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What materials and machines are needed for plastic processing?

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the energy-saving essence of wood plastic composite plastics is to use the waste of natural wood processing (such as sawdust, wood powder, hemp fiber, fruit shell, rice bran, pulp, orange stalk, bamboo powder, etc.) for ultra-fine surface treatment, blend with synthetic resin, and the filling amount can be up to 50%. The formed products can be sawed, planed and drilled, with low water absorption, no deformation due to moisture, no formaldehyde, and meet the safety requirements of environmental protection, flame retardancy and so on. In the past, wood chips, wood powder and waste materials were mostly burned, which not only wasted a lot of resources, but also caused environmental pollution. As an energy-saving, material-saving and environment-friendly material, wood plastic composite has attracted widespread attention in the world, and there are many research results. In the past 10 years, wood plastic composites in North America have increased by 50% every year. The development of wood plastic composite plastics is more meaningful in China, because in 2000, the demand for wood in China was as high as 101.9 million m3, the supply was 63.9 million m3, and the gap was as high as 38 million m3

wood plastic composites are mainly used in the construction industry (building planks), automobile industry (door panels, rear shelf panels, roofs, overhead boxes, protective plates, etc.), storage industry (pallets, base plates, packaging boxes), transportation industry (highway noise partitions, protective barriers, warehouse partitions, rail sleepers), agriculture (scaffolding, tanks, buckets), facilities (floors, open-air tables and chairs, sheds, ladders, etc.). Taking pallets as an example, the domestic market demand is about 100 million, more than 90% of which should be changed to wood plastics. It is necessary to develop an emerging industry with an output of 10 million tons and a value of 60 billion yuan

however, there are many key technologies in the production of wood plastic composite products: the manufacturing technology of resin and wood powder, the drying technology of wood powder, and the treatment technology of wood powder interface; In injection molding, extrusion and blow molding equipment, single screw or twin screw is required to have good dispersibility, wettability, mixing, shearing, exhaust, dehydration, devolatilization and bubble elimination functions for wood flour; Plasticized parts shall be corrosion-resistant and wear-resistant; The equipment shall have the function of accurately controlling the above process conditions and the residence time of materials in each part

TPE rapid processing technology


it is predicted that in the near future, injection molding processors can significantly shorten the processing cycle by adopting a new technology when processing thermoplastic rubber. Using this technology can not only greatly reduce the cost of producing single parts, but also improve the processing capacity of injection molding. Combined with this advanced processing technology, a new TPE series will soon appear in a new look, and its processing speed will be 25% higher than that of the usual rubber brand. These materials with improved processing and molding properties can also significantly reduce the production cost of injection molding processors

it is reported that putting this latest rubber technology into the market can help processors save production costs and improve production capacity, which is more conducive to their business expansion. At the same time, this new rapid processing technology has further expanded the economic boundary of selecting rubber to replace thermosetting rubber

other advantages of choosing rubber to replace thermosetting rubber include ease of processing, design adaptability, reliable component consistency, recyclability, and efficient use of waste, including waste generated in the production process and after the service life of components

this technology can also be used for injection molding, blow molding and extrusion molding. However, the production type that needs a long processing cycle, such as injection molding, can benefit most from this new technology

new development direction of packaging machinery control technology

today’s mechanical control system seems to be single, but it contains logic and motion control system, man-machine interaction system, diagnosis system and even artificial intelligence system. The following examples from packaging machinery manufacturing industry will reveal the new development direction of mechanical control system

like most technologies, mechanical control technology has experienced twists and turns in the development process. It has developed from a simple and huge control system in history to today’s small multi-functional control system, which organically combines machinery, motion control and communication system

initially, the first generation of packaging machinery used in the packaging field – dubbed GEN1, has a simple structure and is purely mechanical. A motor drives the linear shaft to rotate and generates power through the cam. The control system using programmable logic controller (PLC) has a simple structure, and the operator directly controls the machine. In most cases, human-computer interaction technology (HMI) has not been adopted. After the emergence of the second generation of packaging machinery. This technology was born ten years ago. The packaging machinery is still driven by the transmission shaft, but the structure is more complex. Because the speed is controlled by the servo motor, it can send instructions to some special actions, and a more complex PLC programmable logic controller is also used. Indeed, the second-generation packaging machinery has better adjustability, but this advantage requires higher cost. These costs include more line layout, more PLC programmable logic controller input /output (I /O) devices, which are large and complex, with more sensors and program control, and even more peripheral equipment; Moreover, it is more difficult to eliminate and deal with the faults

Author: Bai Jiena replied to this speech at 16:48, March 27, 2007


2 new plastic processing technology 10

the current third generation packaging machinery integrates the so-called “mechatronics” concept and adopts servo system and simple mechanical devices to achieve the purpose of performing complex actions. The goal pursued by the seller is: the price of the machine is cheaper, the working speed is faster, the performance is better, and the floor area is small. Therefore, it is not surprising that new technologies are constantly introduced according to the demand

the third generation packaging machinery was born four years ago. Its development focus has shifted to single box control technology. It has logical PLC function and I /O device. If necessary, it can also be equipped with HMI technology, even Ethernet and network communication service system to facilitate communication between enterprises. Previously, the second generation packaging machinery needed an encoder and programmable limit switch (PLS) to determine the servo position. Now, because the third generation packaging machinery has I /O device, the servo control system exists in a processor. When the servo system is in place, it will produce sensing action and send a signal through the bus to start any required process flow

two step granulation of engineering thermoplastics

Weima machinery company of Germany showed the latest achievements of two-step granulation equipment at the Milan Plastics Exhibition on February 14-18, 2006, which is characterized by two primary and secondary granulators. The equipment is applicable to the economical granulation of engineering thermoplastics such as ABS, PA, PBT, PC, POM, PPA and LCP, especially the granulation of reinforced glass fiber, in the form of large waste bl
ocks or large volume production residues

in two-step granulation, the material to be granulated is pre granulated into particles of about 40mm size in WLK solid single shaft main granulator, and then further granulated into final particles of about 3-10mm by NZ subsequent secondary granulator, which is specially designed for secondary granulation of pre granulated materials

in order to avoid granulation failure, it is necessary to continuously add appropriate amount of material to the crusher, and these requirements are generally difficult to guarantee through manual operation. Once the feeding is excessive, it will usually cause uneven granulation, fluctuation and high-level noise. The result is that the material is accumulated or the heat energy of the material being crushed is weakened due to friction. In addition, the high sensitivity of interfering materials and the wear of ordinary blades causing frequent blade replacement need to be observed

in contrast, two-step granulation can make the main granulator feed discontinuously, where the hopper plays the role of buffer. Feeding in this way is of great significance to optimize the whole production process, because those operators do not have to operate the granulator continuously, so that they can be busy with other work

through the control of a stop switch, the pre granulated particles are now well added to the NZ secondary granulator. The arrangement of two granulators can be selected as one above the other or one after the other. The secondary granulator works according to the working principle of the cutter and is specially designed for pre granulated particles. Compared with the ordinary granulator, the volume of the second generation granulator is much smaller and only needs less driving energy of the whole machine. Due to its uniform feeding and running at a speed of approximately 450 min-1, there has been no failure. When such a granulator is used for the second crushing of pre granulated materials, the noise level is much lower than that of one-step processing with the same speed (n = 450-500min-1)

Cortez will show kcc20d extrusion blow molding machine

Cortez Machinery Manufacturing Co., Ltd., a pioneer in the field of global blow molding machinery manufacturing, will participate in the international rubber and plastic exhibition held in Shanghai from April 26 to 29 again

on this year’s booth (exhibition hall W2, platform E03), Cortez will display a kcc20d extrusion blow molding machine. It is equipped with zwvp30 four cavity die with a center distance of 100mm. In this exhibition, the machine will produce 0.75 liter round bottles at a production rate of 2400 per hour

Cortez can provide a wide range of blow molding machines. For the production of continuous extrusion or storage cylinder die head, it is equipped with mobile die clamping device, or in the production of packaging containers with a capacity from a few milliliters to 30 liters, and even large containers with a capacity of 10000 liters, six or seven layer co extrusion fuel system, and in the production of three-dimensional rotating pipe fittings, it is equipped with parison feeding device. In this way, the flash can be minimized to meet the requirements of automobile pipes, household appliances and other technical components

single sandwich injection molding and automotive technology

the automotive industry continues to face great pressure from the demand for flexibility and continuous improvement of production methods. Along with cost cutting and meeting the constant requirements of increasingly stringent environmental regulations (such as emission reduction and disposal of old vehicles), there are safety issues, including the five-star European NCAP classification system

the current trend, such as more and more automobile styles for specific markets, requires further development in platform sharing policies, spare parts sharing systems and combined design methods. Other hot topics include value-added, function improvement and vehicle weight reduction
the plastics industry can now make great contributions in the fields of lightweight structure, versatility and design flexibility. Moreover, processes similar to single sandwich, multi-component solutions, shortened cycle time and reduced energy consumption can all help reduce the overall cost. Figure 1 shows exactly how much lower material demand and shorter cycle time, i.e. increased production, can contribute to the production costs associated with single component automotive components

single sandwich injection molding and automobile

have great competitive advantages for single sandwich processes with different core and skin materials. The following table summarizes the two processes

especially for large parts, the material cost reduction achieved by using recycled materials in the core layer can

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