Recently, DEKUMA’s upgraded and optimized new RC480 automated rubber track production machine has been commissioned, and successfully exported to South Korea and arrived at the customer’s factory.
This customer is one of the largest auto parts manufacturers in South Korea, with production bases in many countries and regions, such as China, Europe, Southeast Asia and South Korea headquarters where DEKUMA’s rubber track machines are widely used.
DEKUMA has been cooperating with this customer for more than 10 years, and continuously improves equipment during the cooperation, and creating greater value to the customer.
Today, let’s see how DEKUMA’s rubber track production machines meet customer needs and keep improving.
Excellent performance of DEKUMA’s rubber track production machine
High degree of automation, reducing labor intensity and manpower requirements
In the past, the traditional production of rubber track required manual feeding, demolding and product retrieval. Generally, the production of a rubber track of several hundred kilograms required 3~4 people to work together.
Overcome steel wires week links, and improve the service life of track
Advanced non-dynamic clamping and vulcanization structure reduces energy consumption in production process
Highly intelligent operating system realizes simple operation
Abstract: This paper analyzes the production process of PTFE compression molding, and summarizes the causes why conventional pressing pressure and pressing process are easy to cause product defects and scraps.
To solve the problems of surface patterns, cracks, discoloration, hidden cracks, etc., the hydraulic press team of Dekuma has developed a precision servo hydraulic press for blank pressing of PTFE powder product, and solves the problem for customers from the root.
01 Introduction to PTFE Properties
PTFE, known as the “king of plastics”, features many excellent properties including colorless, non-toxic, wide temperature resistance, chemical inertness and low coefficient of friction.
It serves as one of the important materials that are indispensable to all industrial sectors, e.g. automobile, national defense, machinery, chemical industry, electronics and other industries. It can also be made into PTFE pipes, rods, belts, plates, etc.
02 Commonly Used Methods of PTFE
The most common method is compression molding when processing products with PTEE.
The process of compression molding goes roughly as follows: raw material inspection → mashing and sieving → measuring → molding → semi-finished product inspection → sintering → cooling → finished product inspection → packaging.
After investigation on the common problems encountered during production of PTFE compression molding, it can be found that the improper operation of pressing pressure and pressing process may easily cause product defects and scraps, and the unstable pressure output serves as the main reason for cracks.
On the basis of understanding the customer’s process, the hydraulic press team of Dekuma has developed a precision servo hydraulic press for blank pressing of PTFE powder product, and solves the problem for customers from the root.
03 Advantages of PTFE Powder Blank Precision Molding Machine
（1） Slow Pressure Rising and Controllable Time
For powder compression, the time will significantly affect the effect of product molding. In case that the speed is too fast, exhaust will be insufficient, which may easily cause problems such as surface patterns, cracks, and large differences in density between both ends and the middle.
For the time control of pressurization, the hydraulic press adopts servo motor oil pump hydraulic system to solve the problem. Under the cooperation of hydraulic pressure and electricity, it has developed a controllable function of slow pressurization based on the set pressurization time, and the pressurization time is controllable from several seconds to dozens of minutes.
（2）Almost no pressure impact and fluctuation in pressurization stage
At the critical point of signaling pressure, most common hydraulic presses will experience the process of overshoot – fallback – stabilization due to inconsistent pressure repeatability each time.
Under the cooperation of server and plc program, the hydraulic press can control the critical point of signaling pressure well under the high sampling frequency and high-speed scanning cycle.
Thanks to the research results of hydraulic team of Dekuma for years, the set target value can be achieved under cooperated control of the server and the plc program. In the pressure holding stage, the pressure fluctuation is controlled within 1 bar, which can also maintain long-time operating of oil pump without damage.
Due to the specific characteristics of PTFE powder, after the initial pressurization to the set pressure and entering the holding pressure stage, the volume can still be compressed continuously. Once the volume is compressed, the pressure shall be reduced and the press will supplement pressure. Therefore, the pressure holding stage of PTFE product serves as a process of hydraulic system continuous pressure dropping and supplementing.
The stability of hydraulic press is realized based on years of application experience. Under the perfect coordination of high response of servo hydraulic PID and discharge flow of hydraulic oil circuit, the pressure fluctuation reaches almost zero.
For accurate pressure output, the hydraulic press engineers continuously optimize the hydraulic system and program. In application of servo system, sometimes a single PDI parameter is often not sufficient for the pressure range of the whole area. With the PID parameters set with low pressure, it will be still not applicable when reaching medium and high pressures.
After finding this situation in practical application, the hydraulic press combines with years of application experience, adopts multiple sets of PID parameters, corresponding to the multi-stage signaling pressure of the hydraulic press, and avoids the inapplicability of a single PID parameter to different pressure stages.
（3）After completion of pressing, the pressure relief time is controllable
For pressing of PTFE powder blank products, sometimes the pressure holding time takes dozens of minutes, with the purpose of obtaining a blank product with uniform density after reaching a certain compression ratio. However, after reaching the pressure holding time, in case of pressure relief instantaneously for some products, it is easy to cause the quality problem of hidden cracks inside the product.
To solve the problem of pressure relief, the hydraulic engineers have developed the function of slow pressure relief process and controllable time, and the pressure relief time can be controlled from several seconds to dozens of minutes.
For this, the pressure relief process can be considered as an inverse process of pressurization. During pressure relief, the pressure is output according to the time ratio for the purpose of reducing pressure until the final pressure relief in place. Conventional hydraulic presses have no such function.
（4）Convenient setting of process parameters
Adopt PLC + touch screen + servo drive control, for intuitive and efficient setting of technological process and parameters.
Most PTFE blank molding methods require two-sided pressurization + product demolding, and one product forming requires pressing twice + demolding once. However, the pressing parameters of the three times are not the same, and common hydraulic presses require repeated manual filling of different parameters three times.
Based on the special process of PTFE, the hydraulic press has compiled the parameter setting method for this process, allowing the customers to input parameters that conform to the product for one time, and the pressing can be completed with only operation controller. The operation is simple and fast, which reduce the probability of errors, improves reliability, and significantly reduces the technical threshold of operators.
For products that require to maintain pressure and exhaust for a certain period of time under different pressures to ensure transmission of pressure to all parts of the resin, it provides a free parameter setting function. (As shown in figure below)
For commonly used product parameters, after completion of debugging and passing inspection, it can be saved as a recipe, which supports one-key save and recall. (As shown in figure below)
（5）Energy saving and environmental protection
Common hydraulic presses produce large noises when working, which can easily pollute the production environment and affect the health of operators. The Datong hydraulic press adopts a servo motor as the power source, whose noise level is only about 70 decibels when working, and is almost silent under standby state. When operating, the torque is output according to the size of immediate load. The power loss is small, which can save 30%-50% of electric energy compared with common hydraulic presses, with significant energy saving effect.
Note that the pressing and holding time of PTFE powder blank products is long. For high precision, the user shall basically maintain the pump on and holding pressure. In this process, the servo motor system of the press only needs a dozen or so percent of output to conform to the pressure holding requirements. The hydraulic system produces less heat, reduces the cooling cost, and extends the service life of oil pump.
Common hydraulic presses require full speed output when the pump is on and pressure is holding. The actual utilization rate is only about 10%, and the machine is doing useless heating work for the rest time. The power loss is large, the energy utilization rate is low, and the oil pump service life of each hydraulic component is reduced.
For PTFE powder molding, accurate and stable pressure serve as the key factor to molding; for investment income, machines with energy-saving, energy conservation and environmental protection and high-utilization features are the key to cost recovery and realization of benefits; for operators, simple and efficient operation mode is the key point; the hydraulic press meets all the above key points, which can meet customer needs, and help customers solve problems from the root.
Abstract: With the continuous improvement of productivity of extrusion production line main unit, the capacity of its downstream equipment shall also be continuously improved to fulfill the requirements. This section introduces the method that Dekuma solves the problems of difficult adjustment of the cutting machine feed mechanism and difficult control of the feed speed with TRIZ innovative theory.
Keywords: TRIZ extrusion line Cutting Machine
01 The main problems of commonly-used feed mechanism in the industry
The feed mechanism of the cutting machine commonly used in the industry meets the processing requirements of the feeding and retracting with a group of hydraulic pump, supply hydraulic oil to hydraulic cylinder to control the swing movement of tool arm.
To cut pipes with different diameters and different wall thicknesses, firstly, it needs to adjust the initial feeding position, and meanwhile, it also needs to effectively control the feed amount of the tool arm; on the other hand, the feeding length is generally controlled by the cylinder stroke, and the initial position of the feed is controlled by adjusting screw of hydraulic cylinder support assembly.
In addition, for different cutting methods, the feeding speed shall also be controlled. The feeding speed is realized by adding the flow control valve in hydraulic circuit. If the speed is too fast, it will easily damage the cutting blade or saw blade.
（1）Difficult to adjust the initial position of tool arm
The initial position of tool arm shall be adjusted by adjusting screw of hydraulic cylinder support assembly. It needs to loosen or tighten the lock nut and rotate the adjusting screw. Due to lack of suitable marking scale, it can only perform the action of feeding and retreating after preliminary adjustment, observe whether the cutting thickness can be completed, and finally lock the adjusting screw. However, when adjusting with this method, the working space is limited, and adjustment is very inconvenient.
（2）Difficult to control the tool arm feeding speed
The feed of tool arm is adjusted by the flow control valve, and it is difficult to obtain a suitable feed speed. The speed is easy to become too fast or too slow. The operators shall adjust the appropriate feeding speed for many times, which requires high technical level of the operators.
（3）Slow feeding speed
The feeding speed has only one speed when passing through the flow control valve, especially under working conditions with relatively slow feeding speed, the tool arm takes more time in approaching stroke. Taking the 40mm feeding stroke as an example, 20mm is approaching stroke, which requires 30s; the remaining 20mm working stroke also takes 30s, and it takes total 1min to complete the cylinder stroke.
02 Solve problems with TRIZ theory
The TRIZ theory was first proposed and summarized by the Soviet scientist Genrich S. Altshuler. TRIZ theory contains many systematic, scientific and operational creative thinking methods and analytical methods for finding problems. After years of development, TRIZ theory has become a mature classical theoretical system for solving practical problems in product development.
The general method of TRIZ theory to solve problems is that, first, abstract the special problem to be solved into a standard problem; then obtain a general solution based on the methods and tools provided by TRIZ theory; finally, obtain the final solution based on the user’s experience.
Heavy Duty Chipless Cutting Machine DKM-PO450
（1）Find and analyze problems – abstract into standard problems
Based on the analysis of the actions of feed mechanism, Dekuma’s engineering team conclude that in the approaching stroke, the feeding speed is expected to be faster, to reduce the feeding time and improve efficiency; while in the working stroke, the feeding speed is expected to slow down. On the one hand, it is aiming to reduce the load resistance of hydraulic cylinder; On the other hand, it is to reduce the rigidity requirement of the whole mechanism, and to improve the service life of the blade. From this analysis, the feeding speed shall be combined fast and slow, forming a pair of physical contradictions.
（2）Conduct resource analysis to find out contradictions
Four separation principles are summarized with TRIZ theory according to space, time, condition and system level, which are space separation, time separation, condition separation, and whole-part separation.
Among them, the principle of time separation is to separate the conflicting parties in different time periods, aiming to solve the problem or reduce the difficulty of problem. Based on analysis, Dekuma’s engineering team solve the problem of different speeds required by feeding speed at different times with this principle.
Comparing the corresponding 12 innovative principles in the principle of time separation, the “fast principle” that completes harmful operations at the fastest speed serves as the most effective one of the 12 innovative principles. For the feed mechanism, slow approaching travel can be considered as a harmful operation, which is very harmful to the improvement of efficiency.
To quickly complete the harmful operation, the “fast principle” is adopted to solve the problem of approaching stroke. Dekuma introduces a deceleration cylinder, which quickly feeds and oil return to complete the action during approaching stroke. When it comes to the working stroke, the oil return of cylinder reduces the speed of working stroke by decelerating to meet the process requirements.
03 Main advantages of the new segment-controlled feed mechanism
To solve the problems encountered by commonly used feed mechanism in the industry, achieve the convenient operation of the extrusion production line, and reduce the cycle time required to replace different pipe specifications, Dekuma’s engineering team has developed a new segment-controlled feed mechanism, with the main advantages and principles as follows:
（1）Fast adjustment of tool arm initial position
The position of tool arm can be adjusted quickly by way of clamp-type tool arm assembly. The operation method goes as follows. Loosen the fixing screws of the clamping block, and swing the tool arm quickly to the marking scale line of the required specification according to the scale displayed on the sign, and then tighten the fixing screws of the clamping block. The initial operation of tool arm position adjustment is thus completed.
（2）Control the oil via deceleration cylinder
Therefore, two stages of fast and slow feed speeds can be achieved. Fast feed is adopted during the approaching stroke, and slow feed is adopted during the working stroke, which can effectively reduce the feeding cycle of tool arm. Taking the 40mm feed stroke as an example, 20mm is the approaching stroke, the time required for fast feed in the approaching stroke is 1s, and the time required for slow feed in the working stroke is 30s, and it takes total 31s to complete the whole stroke, which can save approx. half time of the original mechanism.
（3）Springs configured by deceleration cylinder and feed cylinder
The hydraulic cylinder can be reset actively, allowing the action of tool retracting to be completed faster, which further reduces the time of the whole process and improves the stability of actions.
04 Various processes of tool feed and retracting – description of actions of feeding cylinder and deceleration cylinder
（1）Fast feeding speed
The oil flow to no rod cavity of feeding cylinder, and the rod cavity cylinder returns oil into the deceleration cylinder. Before the piston of the deceleration cylinder reaches the limit position, the piston can move quickly, and the return oil of piston enters the hydraulic tank via valve body.
（2）Slow feeding speed
After the piston of deceleration cylinder moves forward and gets contact with the limit point, the piston will stop, and the oil can only return to the hydraulic tank via throttle valve. Thus the forward speed of the cylinder is reduced significantly, and it enters the slow-speed stage until the feed reaches in position.
（3）Fast retract speed
Both the deceleration cylinder piston and the hydraulic cylinder are set with return springs. The oil passes through the deceleration cylinder piston and quickly pushes the deceleration cylinder piston back to its original position driven by the spring’s reset thrust. Also acted by the spring force, the oil cylinder realizes fast return action.
（4）Retract in place
After the piston of the deceleration cylinder returns in place, the oil passes through the check valve. The piston installs with a check valve, allowing the oil to quickly pass through the piston, enter to rod cavity, and push the tool arm to return to the origin position quickly.
By applying the invention principle of TRIZ theory, Dekuma has proposed the idea of solving the problem of feed segmented control, which improves the action performance of feed mechanism cylinder and the time of each process.
The new segmented-control feed mechanism developed by Dekuma doubled the feeding speed, and ensured the stability and reliability of the retracting action. The cutting machine, as part of the extrusion production line, can better match the productivity of the entire production line!
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The future will be dominated by big data. Your choice made now will decide to become a stumbling block or an accelerator for development of rubber and plastic manufacturing enterprise……
Abstract: This paper introduces an environmentally-friendly and efficient servo hydraulic press for production of backing plate of brake pads launched by Cosmos Presswhich widely used in the brake pad industry in past few years.
Keywords: automobile brake pad, production of steel backing, automatic production.
1. Difficulties in production process and special equipment for backing plate
Our investigations in Guangdong, Jiangsu, Zhejiang, Hebei and Shandong district reveal that the production of backing plate has the following features: the steel plate is relatively thick, generally 4-6mm, while the backing plate is generally designed with rivets and holes for installation on the caliper, therefore, the production processes are various and accuracy requirement is high.
At present, in the industry, the conventional punching process is the main production method. The main production equipment are mechanical presses. Some factories will use traditional hydraulic presses in some processes.
The control of quality is difficult in the production process with mechanical press and traditional hydraulic press. The production with mechanical press has a great impact on the service life of die. There is no domestic machine manufacturer to produce precision pressing equipment for backing plate. Some customers with high quality requirements will use imported fine blanking press which improves the quality of backing plate. However, the fine blanking press with price of several millions greatly increases the production costs. In addition, it is not conducive to flexible production with different specifications and in small batches, and affect the competitive advantage of enterprise.
Furthermore, the mechanical press generates great noise during punching process, so it is not environmentally friendly. Workers must wear ear protector for protection, the worse working environment cause difficulties in recruitment. With the improvement of urbanization, a factory which generates noise and is not environmental friendly is often complained, so the working time is greatly limited!
2. Introduction to functional characteristics of Cosmos servo driven hydraulic press
Automobile brake pads are vulnerable parts with large production volume. With the rapid growth of the automobile market and the increase of automobile owner, all automobile brake pad manufacturers are expanding their plants to increase productivity, and new manufacturers are also running into the market.
To meet the needs of customers, Cosmos Press, under the support of the group’s strong R&D strength, has launched a special environmentally-friendly, low noise level and efficient servo driven hydraulic press for production of backing plates. The machine matched with the molds can fully cover the typical production processes of backing plates including 1.chamfer forming; 2.stamping; 3.pin forming and 4.fine stamping;
At the beginning of the design, the characteristics of “large quantity and low price” of backing plate production were known. On the premise of meeting the function, the costs of the equipment should be minimized, and the redundant design should be well controlled, to ensure that each kilogram of steel of the equipment is useful, and each component is appropriate at this position.
3. Advantages of Cosmos servo driven hydraulic press
3.1 Compact structure, easy operation, and automation
This machine is different from the traditional small table hydraulic press. Its hydraulic electrical system is reasonably designed and arranged on top. It is compact, has no obstacles around the machine, and is convenient for operation and installation of the mold. It does not affect the placement and handling of products. It is deeply favored by the workers on site. There is no obstacle around. Therefore, neither single machine automation nor multi-machine automation is affected. The production mode of multi-machine automation device reduces the manpower.
3.2 Rigid and lightweight machine body structure
The machine body structure avoids the “short, flat and fast” method of the small table machine, that is, three platens are made of heavy steel plates to achieve the purpose of rapid design and production. The three platens composed of top platen, moving bolster and fixed bolster are made of high-quality nodular cast iron. The reinforcement structure adjusted by finite element analyses is more reasonable, enhance good strength and small stress deformation, and has more optimized weight and safety factor ratio. Therefore, it avoids the phenomenon of “the wool coming from the sheep”, i.e. customers spending more money on machine weight.
3.3 Low noise level, environmentally-friendly, high-speed and stable hydraulic system
3.3.1 Low noise level and environmentally-friendly
The optimized servo motor hydraulic pump system only generates approximately 70dB to 80dB noise level during operation, and almost doesn’t generate noise in idle time, which greatly reduces the noise problems in the working environment. The operator enjoys moving from mechanical press workshop to servo driven hydraulic press workshop. To a certain extent, it also reduces the pressure of labor recruitment.
3.3.2 Pressure and position accuracy
The moving position and the pressing pressure are controlled and detected by precision linear transducer and pressure sensor. The pressure sensor matched with servo driver control can realize stepless regulation of working pressure. The working pressure for production of large and small backing plates can be set according to demand, which improves the quality and stability of products, and improves the “uncontrollable pressure and vulnerable mold” during punching operation; the pressing pressure can provide data support for new product development according to the size and accuracy requirement of product.
3.3.3 High-speed response
The highlight of the hydraulic system is used of imported Rexroth directional valve matched with the domestic mature two-way large-flow cartridge valve technology which not only realizes high-speed response to meet the production efficiency, but also reduces the manufacturing costs of the high-speed hydraulic system. The specially designed cartridge valve system reduces the resistance of the hydraulic oil flowing at a high speed, reduces the calorific value and the energy consumption, ensures the long-term high-speed response without stuck phenomenon, and ensures 24 hours stable and automatic production of press hydraulic system installed with oil cooler.
3.3.4 Control system
The “PLC+ touch screen + servo driver” control can realize the intuitive and efficient setting of the process flow and parameters. The flexible pressing process is adopted. Based on current backing plate production process and years of experience, Cosmos Press’ machine contains most of the pressing technologies of production process in the market. It can do the pressing process that cannot be completed by the mechanical press, realize the flexible and multi-purpose use of one machine, reduce the expenses and floor areas of production line, and lower the production costs.
Instant and effective action prompts
3.3.5 Unique finishing process structure
Based on the requirements of production process of backing plate, the machine is designed with a special cushion cylinder structure for finishing process. The sheared edge zone and dimensions of backing plate produced by the customer’s mold with the cushion cylinder structure, can reach the precision requirement from main engine factory. A special proportional pressure valve is equipped on the two-way cartridge valve to realize the floating blank holding force during finishing. By adjusting the floating blank holding force, the sheared edge zone of finished backing plate can meet the requirements. Besides, under the support of the floating force, the geometric dimensions of the previous processes of the backing plate will not be affected. A certain leveling effect will also be achieved.
Equipped with a special mold frame, it can be used in the reverse finishing process, that is, the ram cylinder is used for pressing and leveling, and the cushion cylinder is used for finishing. This process action is applicable to products requiring high leveling force.
The finishing process meets the quality requirements of backing plates. Three or four machines are combined to form an automatic line for production of backing plates. Customers do not have to spend millions on purchasing imported machines. It reduces the production costs of products, realizes the flexible production with different specifications and in small batch, and improves the product competitiveness.
4. Other advantages
4.1 Energy saving
The servo motor as the power source of machine. In working, it outputs the torque according to the real-time loads. Its power loss is small, 50% less than the traditional induction motor fixed with displacement pump, and at least 30% less than the traditional induction motor with variable pump.
4.2 High productivity
Its productivity is equal to that of mechanical press. It can complete punching action within 1.3s-1.6s and complete finishing action within 1.7s-2.3s.
Its successful development has solved three problems in traditional brake pad production process with mechanical press, i.e. “difficult recruitment & low per-capita productivity, noisy and high energy consumption”, relieves the pressure of environmental protection of an enterprise in production, greatly improves the product competitiveness, creates profits for users, and makes contributions to the development of automobile industry in China.
1. Hardship in plastic machinery development
Since 2002, with China’s reform and opening-up policy, its economy rapidly grew and there was a strong demand for rubber and plastic machinery and equipment from different industries. The Chinese manufacturing industry’s knowledge and technical skills in the rubber and plastic machinery industry was well behind other foreign countries’, causing local domestic manufacturing companies to be dependent on imported machines. European and American equipments were more advanced, but they were expensive. Shipments were also slow and after-sales services were mostly unresponsive. If the machines or components were damaged when received and required re-ordering, the lead-time usually took at least one or two months for another shipment. This greatly hindered China’s rapidly growing manufacturing industry.
Some European manufacturers realized the opportunity for business development in China, and decided to invest and set up factories in China. Only a few of them were successful in setting up their manufacturing facilities and developing their own brands in China, most of them were unable to take any market shares in the Chinese market due to a lack of understanding of Chinese law, culture, the market, etc.
2. Awakening of the industry
Amid the industry’s development, we questioned if a machine with high performance and reasonable production cost was really impossible, and whether high-end rubber machines can only be used in niche markets.
For several years, the core management team of Cosmos Machinery Enterprises Ltd. (Cosmos) had been searching for solutions.
Cosmos is a Hong Kong listed company with more than 40 years of experience in machine manufacturing, industrial product trading, and manufacturing of plastic products. Cosmos has been one of the market leaders in machine manufacturing in China Mainland, with an ample source of quality customers and suppliers. Our strong sense of brand awareness and quality control have demonstrated asuccessful model more capable than our mainland counterparts. In addition, Cosmos has an advanced and extensive capacity forproducing and processing rubber machinery as well as the rich experiences in collaborating with some international partners. More importantly, the core team in Cosmos could communicate well and exchange ideas with Europe counterparts, which would help us understand and develop necessary knowledge and skills in advancing our technology.
With Cosmos recognizing the importance of manufacturing its rubber machineries on its own, it then built a machining center in the 1990s, which has possessed a strong processing and production capacity.
In order to enhance the competitiveness of China’s rubber and plastics machinery and equipment industry, and reduce the dependency on imported equipments, it was important to develop the ability to build our own high-end equipments, that is why Cosmos’ executives have conceived a uniquesolution.
DEKUMA GmbH Deutsche Kunststoff Maschinen
With the continuous competitive environment across all industries, the competitive edge of Dekuma’s standard was being challenged, and more importantly, both domestic and foreign customers urgently needed customized equipment to enhance their competitiveness.
In order to satisfy the upgrading needs of customers, Dekuma turned its attention to the niche market segments in 2012 and began actively paying attention to theirneeds by continuing the technological innovation and continuous research and development.
Although there was still a gap between Dekuma’s equipment and imported equipment, the gap was narrowing rapidly. Comparing with foreign branded equipment, some of Dekuma’s most significant competitive edges are rapid response, effective technical exchanges in early stages, timely equipment delivery, equipment installation and optimization, and quick solutions to problems encountered by customers… These characteristics could be the real solution for problems of efficiency encountered during the rapid development of all Chinese manufacturers.
Among different niche market application, Dekuma has been highly recognized by our users such as from automobile nylon tubing, rubber track, the microduct cables, hydraulic press for brake pad sectors thanks to our strong R&D, perseverance and our willingness to customize products for our clients.
6. China’s smart manufacturing journey