WO2018210035A1 - 共挤复合模头以及复合板材生产设备 - Google Patents

共挤复合模头以及复合板材生产设备 Download PDF

Info

Publication number
WO2018210035A1
WO2018210035A1 PCT/CN2018/078297 CN2018078297W WO2018210035A1 WO 2018210035 A1 WO2018210035 A1 WO 2018210035A1 CN 2018078297 W CN2018078297 W CN 2018078297W WO 2018210035 A1 WO2018210035 A1 WO 2018210035A1
Authority
WO
WIPO (PCT)
Prior art keywords
extrusion
roll
composite
channel
fluid
Prior art date
Application number
PCT/CN2018/078297
Other languages
English (en)
French (fr)
Inventor
何海潮
刘红彬
Original Assignee
苏州金纬机械制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州金纬机械制造有限公司 filed Critical 苏州金纬机械制造有限公司
Publication of WO2018210035A1 publication Critical patent/WO2018210035A1/zh

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/355—Conveyors for extruded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets

Definitions

  • the invention belongs to the technical field of plastic sheet metal forming, and particularly relates to a molding device for producing different kinds of plastic composite sheets with different melting points.
  • Plastic composite panels are widely used in various fields such as locomotives and trolleys.
  • PVC/ABS sheets which are formed by vacuum forming, among which PVC (Polyvinyl)
  • PVC Polyvinyl
  • chloride polyvinyl chloride resin adds a large amount of plasticizer during processing to increase the plasticity and softness of the plastic, but the mechanical properties are degraded.
  • the soft PVC is sensitive to stress and cannot be completely deformed. Recovering, its thermal stability is poor, and it will cause different degrees of degradation after being heated.
  • TPU-ABS composite board instead of PCV-ABS sheet, and are widely used in various fields such as locomotives and trolleys.
  • TPU Thermoplastic Polyurethanes, thermoplastic polyurethane elastomers, which have a light weight and a wide hardness range (60HA-85HD), wear-resistant, oil-resistant, high transparency, good elasticity, etc., widely used in daily necessities, sporting goods, toys, decorative materials and other fields.
  • ABS Acrylonitrile
  • Butadiene Styrene plastic acrylonitrile-butadiene-styrene plastic
  • It has the advantages of high strength, good toughness and easy processing. It is widely used in machinery, automotive, electronic appliances, instrumentation, textile and Industrial fields such as construction.
  • the TPU-ABS composite board is a multi-layer board with ABS plastic as the inner layer and TPU as the outer layer. In the prior art, the following two methods are generally used.
  • TPU and ABS are respectively extruded into a strip shape, and then integrated into one by heat pressing.
  • the surface is sure to be in contact with the air, and at this time, the hot pressing is performed, and the adhesion between the two interfaces is unreliable and is easily peeled off.
  • the composite sheet synthesized by the above method needs to use viscose, and emits harmful gases such as formaldehyde during the application process.
  • an object of the present invention is to provide a composite die which can be applied to composite coextrusion of dissimilar materials and a composite sheet production apparatus.
  • a co-extruded composite die includes a first body, a second body, an intermediate body sandwiched between the first body and the second body, and a temperature regulating system, wherein the surface fluid is formed between the first body and the intermediate body Forming an extrusion channel, the second body and the intermediate body form an underlayer fluid extrusion channel, and the first body and the second body form a junction channel and a discharge port located downstream of the junction channel, a surface fluid extrusion passage and an underlying fluid extrusion passage merge at an upstream of the merge passage, the temperature adjustment system including a first fluid heater for adjusting a first body temperature, and a second body temperature for adjusting A second fluid heater and a third heating device for heating the intermediate body.
  • the bottom fluid extrusion passage is parallel to the merge passage, and an angle between the surface fluid extrusion passage and the merge passage is greater than 90°.
  • the first body is movably disposed with a surface regulating choke rod extending at least partially into the surface fluid extrusion channel, and the intermediate body is movable at least partially An underlying conditioning baffle extending into the underlying fluid extrusion channel, the first body and the second body forming a die at an end adjacent the discharge opening.
  • the third heating means comprises an oil hole formed in the intermediate body and a heating system for providing circulating hot oil to the oil hole.
  • the intermediate body has a higher temperature than the first body and the second body.
  • the first body or the second body is provided with a U-shaped notch, and the mouth of the notch is provided with a tensioning mechanism for adjusting the opening size of the discharge opening.
  • the notch is opened on the first body, and a groove is formed in a side of the notch near the discharge opening, and a non-position hole is formed on the other side of the notch.
  • the tensioning mechanism includes a tension bolt inserted in the limiting hole, a tensioning hook fixed to one end of the tensioning bolt, and two end portions respectively hooking the tensioning hook and the a transitional pull hook of the groove, the other end of the tension bolt is coaxially provided with a rotatable rotating portion, the rotating portion is provided with an external thread, and the first body is provided with a tension nut, The rotating portion is threaded onto the tension nut.
  • the second body has an underlying base surface
  • the first body has a first surface base
  • the first surface base and the bottom surface enclose the combined channel
  • the intermediate body has a second surface layer, the bottom surface and the second surface layer form the second fluid passage, and the first surface layer is away from the second surface of the second surface The second body described.
  • the merge channel has at least one relaxed section of increased cross section.
  • the invention also adopts the following technical solution: a composite sheet production equipment, comprising a surface layer extrusion unit, a bottom layer extrusion unit, the aforementioned composite mold head, a three-roll molding machine and a sheet conveying unit; the three-roll forming machine comprises a lower roll, a middle roll and an upper roll arranged in sequence from upstream to downstream, the discharge port being oriented between the middle roll and the lower roll, and the composite material flowing out from the discharge port Passing between the intermediate roller and the lower roller, between the upper roller and the intermediate roller.
  • outer surfaces of the upper roller and the lower roller are mirror surfaces, and the outer surface of the middle roller is a matte surface.
  • the temperature of the upper roll is 50 to 60 ° C
  • the temperature of the lower roll is 70 to 80 ° C
  • the temperature of the intermediate roll is 10 to 20 ° C.
  • the composite sheet production apparatus further includes a longitudinal cutting unit and a lateral cutting unit disposed downstream of the three-roll forming machine, and the longitudinal cutting unit and the horizontal cutting unit are disposed between the longitudinal cutting unit and the horizontal cutting unit.
  • the three-roll forming machine is provided with three front and rear moving mechanisms corresponding to the upper roller, the middle roller and the lower roller, respectively.
  • the co-extrusion compounding die and composite sheet equipment of the invention innovatively adopts an in-mold composite mode of dissimilar materials, and can separately adjust the temperature of the two materials for the difference of the characteristics of the two materials, and realize the one-time extrusion molding of the surface layer and the bottom layer.
  • the intermediate body is provided as a heat insulating layer and is provided with an independent third heating device; the composite die can also adjust the material thickness in the mold by adjusting the one-side choke rod. The thickness of the two melt discharges can be adjusted, and the total thickness of the product can be finely adjusted at the exit of the die, and the adjustment mode is simple and convenient compared with the conventional mold.
  • the intermediate roller contacting the material needs to be forcedly cooled during the extrusion process, and the upper roller and the lower roller are heated.
  • the device is equipped with a separate chiller and water heater for real-time collection.
  • the temperature of the upper, middle and lower rolls is automatically adjusted by the PID cycle to ensure that the surface temperature of the roll is at a constant temperature, which is beneficial to obtain a composite sheet with good flatness and gloss.
  • the invention has the advantages that the invention co-extrudes two plastics with different melting points through a co-extrusion composite die, and is cooled and shaped by a three-roll forming machine, and can simultaneously produce a composite plate of two different materials, the composite plate. Different from the traditional glued composite products, it has the advantages of no formaldehyde and no odor, and will not cause secondary pollution. At the same time, the equipment can improve productivity and reduce manufacturing cost, and meet the market demand of modern industrial low energy consumption and low processing cost.
  • Figure 1 is a front view of the present invention
  • Figure 2 is a plan view of the present invention
  • Figure 3 is a plan view of the surface layer extrusion unit
  • Figure 4 is a front elevational view of the bottom extrusion unit
  • Figure 5 is a front view of a three-roll molding machine
  • Figure 6 is a cross-sectional view of the composite die
  • Figure 7 is a partial enlarged view of a portion A in Figure 6;
  • the production apparatus includes a surface layer extrusion unit 1, a bottom layer extrusion unit 2, a composite die 3, a three-roll molding machine 4, a sheet conveying unit 9, a cutting unit, and the like.
  • the surface extrusion unit 1 and the bottom extrusion unit 2 are similar in structure, and each comprises an extruder 101, a screen changer 102, a metering pump 103, a feed cylinder and the like.
  • the surface layer is TPU material
  • the bottom layer is ABS material. Two kinds of materials with large differences are compounded by in-mold compounding.
  • the extruder 101 is connected to the screen changer 102.
  • the discharge port of the screen changer 2 is connected to the metering pump 103.
  • the composite die 3 has two feed ports, respectively, and the surface metering pump 103.
  • the material outlet and the bottom metering pump are connected, and the two materials are layered and extruded together by the composite die 3, and the extruded composite material then enters the three-roll forming machine 4.
  • the co-extruded composite die 3 is used to co-extrude two different materials.
  • the coextruded composite die 3 includes a first body 301, a second body 303, and an intermediate body 302 sandwiched between the first body 301 and the second body 303.
  • the intermediate body 302 is provided with a surface fluid inlet 313, a surface of the first body 301 and the intermediate body 302 is formed with a surface fluid extrusion channel 331; and a second layer 303 forms an underlying fluid with the intermediate body 302.
  • the material formed forms a composite material covering the surface layer on the bottom layer, and the surface layer and the bottom layer can be extruded at one time.
  • the bottom fluid extrusion passage 332 is parallel to the merge passage 333, and the angle between the surface fluid extrusion passage 331 and the merge passage 333 is greater than 90°.
  • the die is thermally insulated and features an independent temperature regulation system.
  • the co-extruded composite die further includes a temperature regulation system for accurately adjusting the temperature of each flow channel, the temperature adjustment system including a first fluid heater for adjusting the temperature of the first body 301, and for adjusting the temperature of the second body 303 A second fluid heater and a third heating device for heating the intermediate body 302.
  • the first fluid heater, the second fluid heater and the third heating device can be implemented by electric heating, circulating water/oil heating, etc.
  • the first fluid heater and the second fluid heater are electrically heated. Heating, while the third heating device is heated by circulating hot oil, the third heating device includes an oil hole opened in the intermediate body 302 and a heating system that provides circulating hot oil to the oil hole.
  • the advantage of this arrangement is that the first fluid heater and the second fluid heater can precisely adjust the temperature of the surface fluid and the bottom fluid to keep the two in a molten state, and the third heating device can adjust the temperature of the intermediate body, and The temperature of the intermediate body is maintained higher than the first body and the second body.
  • the temperature of the first body is maintained at about 230 ° C
  • the temperature of the second body is maintained at about 190 ° C to 200 ° C
  • the temperature of the intermediate body is maintained at about 260 ° C.
  • the surface material TPU and the bottom material ABS are compounded at a higher temperature in the mold, and the two materials still maintain a certain temperature difference when compounded.
  • the first body 301 is movably provided with a surface regulating choke rod 304 extending at least partially into the surface fluid extruding channel 331, and the movable portion of the intermediate body 302 is provided with At least partially extending into the bottom layer regulating choke rod 305 in the bottom fluid extruding channel 332, adjusting the displacement of the extrusion channel by adjusting the surface regulating choke rod 304 and the bottom layer regulating choke rod 305 into the extrusion channel, and adjusting the width of the extrusion channel, Further adjust the thickness of each material.
  • the first body 301 and the second body 303 form a die at one end of the discharge port 312.
  • the first body 301 defines a U-shaped notch 311, and the notch 311 is provided with a groove near the discharge port 312.
  • the other side of the notch 311 defines a limiting hole.
  • the tensioning mechanism includes a tensioning bolt 306 that is inserted into the limiting hole, a tensioning hook 307 that is fixed to one end of the tensioning bolt 306, and hooked ends at each end.
  • the first hook 307 is provided with a rotating nut 310, and the other end of the tensioning bolt 306 is coaxially provided with a rotatable rotating portion 309.
  • the rotating portion 309 is provided with an external thread, and the first body 301 is provided with a tension nut 310.
  • the rotating portion 309 is screwed on the tension nut 310, and the rotation of the bolt 306 is adjusted to adjust the size of the notch 311, thereby adjusting the size of the opening of the die.
  • the invention adjusts the choke bar on one side of the mold, can ensure uniform discharge of the two layers of melt, and can finely adjust the total thickness of the composite material at the exit of the die, and the adjustment mode is simple and convenient compared with the conventional mold.
  • Adjusting the thickness of the material through the choke rod 305 will affect the pressure in the extruder at the same time.
  • the two extruders are respectively equipped with a gear pump, and the pressure closed-loop control is realized by the PLC. Ensure that the pressure is stable after the melt enters the cavity, which can achieve uniform discharge and ensure the thickness of the sheet is consistent.
  • the surface of the second body 303 contacting the intermediate body 302 and the first body 301 has an underlying base surface 334 having a first surface layer 336 on the first body 301, a first surface layer 336 and a bottom layer.
  • the base surface 334 encloses a merged passage 333;
  • the intermediate body 302 has a second surface base 335, and the bottom base 334 and the second surface base 335 form a second fluid passage 332, the first surface base 336 being opposite the second surface
  • the base surface 335 is away from the second body 303, that is, the distance between the bottom base surface 334 and the first surface base surface 336 is greater than the distance between the bottom base surface 334 and the second surface base surface 335, so that the surface material can be smoothly laminated on the bottom layer.
  • the surface of the material Preferably, the surface fluid extrusion channel, the bottom fluid extrusion channel and the junction channel each have at least one slack having an increased cross section, and the material may undergo a compression-fluffing-compression process as the material flows from the flow channel. Improve toughness and enhance performance.
  • the three-roll forming machine 4 includes a lower roll 403, a middle roll 402 and an upper roll 401 which are disposed in order from the upstream to the downstream in the extrusion direction of the composite material, and the discharge port of the composite die 3 is located at the intermediate roll. Between 402 and the lower roll 403, the composite material flowing out of the discharge port enters the three-roll forming machine 4 from between the intermediate roll 402 and the lower roll 403, bypasses the intermediate roll 402, and then passes between the upper roll 401 and the intermediate roll 402. Wear it out.
  • the upper roll 401, the middle roll 402, and the lower roll 403 are respectively provided with three front and rear moving mechanisms on the three-roll forming machine 4, and the gap and position between the upper, middle, and lower rolls can be freely adjusted by the front-rear moving mechanism. Further, downstream of the three-roll forming machine 4, a longitudinal cutting unit 5, a cooling bracket 8, and a transverse cutting unit 7 are provided downstream of the three-roll forming machine 4, a longitudinal cutting unit 5, a cooling bracket 8, and a transverse cutting unit 7 are provided downstream of the three-roll forming machine 4, a longitudinal cutting unit 5, a cooling bracket 8, and a transverse cutting unit 7 are provided downstream of the three-roll forming machine 4, a longitudinal cutting unit 5, a cooling bracket 8, and a transverse cutting unit 7 are provided downstream of the three-roll forming machine 4, a longitudinal cutting unit 5, a cooling bracket 8, and a transverse cutting unit 7 are provided downstream of the three-roll forming machine 4, a longitudinal cutting unit 5, a cooling bracket 8, and a transverse cutting unit 7 are provided downstream of the
  • the present invention forcibly cools the middle roll contacting the TPU during the extrusion process, and heats the upper roll and the lower roll, and
  • the temperature of the upper roll 401 is kept at 50 to 60 ° C
  • the temperature of the lower roll 403 is 70 to 80 ° C
  • the temperature of the middle roll 402 is kept constant at 10 to 20 ° C
  • the middle roll 402 is filled with cooling water while the upper roll 401 and the lower roll are simultaneously
  • the outer surface of the 403 is designed as a mirror surface
  • the outer surface of the middle roller 402 is designed as a matte surface.
  • the upper roller 401 and the lower roller 403 are opposite to the steering of the intermediate roller 402.
  • Each roller is provided with a separate roller temperature control system to control the surface temperature of the roller. Since the temperature of the roller surface of each roller is constant, the material extruded from the composite die 3 can be cooled by constant temperature. It is beneficial to obtain a composite material with uniform tension and good stability. Therefore, a composite sheet with high flatness and good surface gloss can be obtained; at the same time, moderate cooling of the middle roll can improve the forming and drawing speed, increase the output, save power, and is beneficial to the development of the market.
  • the composite material from the upper roll 11 of the three-roll forming machine is subjected to preliminary cooling, and is naturally cooled by passing through the cooling tray 8. Then, the sheet is pulled by the tractor, the sheet is pulled into the entrance of the transverse cutting unit 7, and the sheet is slit by the transverse cutting unit 7, and the cut sheet is transported to the automatic pile through the sheet conveying unit 9.
  • the material table is stacked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

一种生产复合板材的共挤复合模头以及复合板材生产设备，表层材料和底层材料通过复合挤出模具共挤出，其中，共挤复合模头通过第一本体（301）、第二本体（303）和中间本体（302）三部分拼合而成，并通过独立的温度调节系统使三者温度各不相同，进而实现同一模具内表层流体挤出通道（331）和底层流体挤出通道（332）和合流通道（333）的温度不同。

Description

共挤复合模头以及复合板材生产设备 技术领域
本发明属于塑料板材成型技术领域，特别涉及一种用于生产熔点不同的异种塑料复合板材的成型设备。
 背景技术
塑料复合板广泛应用于各类机车、拉杆箱等诸多领域。目前市场上的汽车仪表板，大多采用PVC/ABS片材，其通过真空吸塑成型，其中PVC（Polyvinyl chloride，聚氯乙烯）树脂为增加柔软性，在加工过程中加入大量增塑剂，使塑料的可塑性及柔软性增加，但却使力学性能下降，同时软质PVC对应力敏感，变形后不能完全复原，其热稳定性差，受热后会引起不同程度的降解。
 技术问题
为改善PVC-ABS片材板的性能，越来越多的生产者采用TPU-ABS复合板替代PCV-ABS片材，并广泛应用于各类机车、拉杆箱等诸多领域。TPU(Thermoplastic polyurethanes，热塑性聚氨酯弹性体橡胶)，其具有重量轻、硬度范围宽 (60HA-85HD)、耐磨、耐油、透明度高、弹性好等优点，在日用品、体育用品、玩具、装饰材料等领域应用广泛。ABS(Acrylonitrile Butadiene Styrene plastic，丙烯腈-丁二烯-苯乙烯塑料) 是五大合成树脂之一，具有强度高、韧性好、易于加工成型的优点，广泛应用于机械、汽车、电子电器、仪器仪表、纺织和建筑等工业领域。
TPU-ABS复合板是一种以ABS塑料为内层、以TPU为外层的多层板，现有技术中通常采用以下两种方法制造。
1、将TPU和ABS分别挤塑成带状，然后通过热压合为一体。这种方法因为两种材料一开始是分别成型的，表面肯定会接触空气，此时再进行热压合，两者界面上附着牢度不可靠，很容易剥离。
2、将TPU和ABS共挤成型。这种方法存在的难点在于ABS的熔点明显高于TPU，而TPU 对温度敏感。在模内温度接近ABS熔点的情况下，TPU的流动性会加大，最终出料时TPU不能很好地铺展在ABS表面而形成很多“孤岛”。
3、此外由于TPU材料在注塑成型的时候粘性太强，容易粘辊，造成复合材料表面缺陷。
4、通过上述方法合成的复合板材需要用到粘胶，在应用过程中散发甲醛等有害气体。
因此，有必要提供一种新的异种材料的复合板生产设备来解决上述问题。
 技术解决方案
为了解决上述技术问题，本发明的目的是提供一种能够适用于异种材料复合共挤的复合模头以及复合板材生产设备。
为了实现上述发明的目的，本发明采用如下技术方案：
一种共挤复合模头，包括第一本体、第二本体、夹在第一本体和第二本体之间的中间本体以及温度调节系统，所述的第一本体与中间本体之间形成表层流体挤出通道，所述的第二本体与中间本体之间形成底层流体挤出通道，所述的第一本体与第二本体之间形成合流通道以及位于合流通道下游的出料口，所述的表层流体挤出通道和底层流体挤出通道在所述的合流通道的上游汇合，所述的温度调节系统包括用于调节第一本体温度的第一流体加热器、用于调节第二本体温度的第二流体加热器和用于加热中间本体的第三加热装置。
本发明更进一步的技术方案是：所述的底层流体挤出通道与所述的合流通道平行，所述的表层流体挤出通道与所述的合流通道之间的夹角大于90°。
更优选的，所述的第一本体上可移动的设置有至少部分伸入在所述的表层流体挤出通道内的表层调节阻流棒，所述的中间本体上可移动的设置有至少部分伸入在所述的底层流体挤出通道内的底层调节阻流棒，所述的第一本体与所述的第二本体在靠近所述的出料口的一端部形成口模。
更优选的，所述的第三加热装置包括开设在中间本体上的油孔和为所述的油孔提供循环热油的加热系统。
更优选的，所述的中间本体的温度高于所述的第一本体和第二本体。
更优选的，所述的第一本体或第二本体上开设有一个U形缺口，所述的缺口的口部设置有用于调节所述的出料口的开口大小的拉紧机构。
更优选的，所述的缺口开设在第一本体上，且所述的缺口靠近所述的出料口的一侧开设有凹槽，所述的缺口的另一侧开设有限位孔，所述的拉紧机构包括穿在所述的限位孔内的拉紧栓、固定在所述的拉紧栓一端部上的拉紧钩以及两端部分别钩住所述的拉紧钩与所述的凹槽的过渡拉钩，所述的拉紧栓的另一端同轴设置有能够转动的旋转部，所述的旋转部上开设有外螺纹，所述的第一本体上设置有拉紧螺母，所述的旋转部螺纹装配在所述的拉紧螺母上。
更优选的，所述的第二本体上具有底层基面，所述的第一本体上具有第一表层基面，所述的第一表层基面与底层基面围成所述的合流通道；所述的中间本体上具有第二表层基面，所述的底层基面与第二表层基面形成所述的第二流体通道，所述的第一表层基面相对于第二表层基面远离所述的第二本体。
更优选的，所述的合流通道具有至少一段横截面增大的松弛段。
本发明还采用了如下技术方案：一种复合板材生产设备，包括表层挤出单元、底层挤出单元、前述的复合模头、三辊成型机以及板材输送单元；所述的三辊成型机包括自上游向下游依次设置的下辊、中辊和上辊，所述的出料口朝向所述的中辊与所述的下辊之间，从所述的出料口流出的复合材料，先后穿过所述的中辊与所述的下辊之间、所述的上辊与所述的中辊之间。
更进一步的，所述的上辊和所述的下辊的外表面为镜面，所述的中辊的外表面为雾面。
更优的，所述的上辊的温度为50~60℃，所述的下辊的温度为70~80℃，所述的中辊的温度为10~20℃。
更进一步的，所述的复合板材生产设备，还包括设置在所述的三辊成型机下游的纵向裁切单元与横向裁切单元，所述的纵向裁切单元与横向裁切单元之间设置有用于对复合材料进行自然冷却的冷却托架。
更进一步的，所述的三辊成型机上对应所述的上辊、所述的中辊和所述的下辊分别设置有三个前后移动机构。
本发明的共挤复合模头和复合板材设备，创新地采用了异种材料模内复合方式，能够针对两种物料特性差异分别调节两种物料的温度，实现了表层及底层一次性挤出成型，为减弱两种物料之间的彼此影响，设置中间本体作为隔热层，并配有独立的第三加热装置；该复合模头还可以在模内调节材料厚度，通过调节单侧阻流棒，可以调节两种熔体出料厚度，并可在口模出口处进行制品总厚度的微调，调节方式相对传统模具简单方便。此外，对于熔体粘度较大的底层材料，在挤出过程需要对接触该材料的中辊进行强制冷却，上辊及下辊需进行加热，本设备配备单独冷水机及水加热器，实时采集上、中、下辊的温度，并通过PID循环对辊温实现自动调节，确保辊筒表面温度处于恒温状态，有利于获得平整度、光泽度好的复合板材。
 有益效果
本发明的优点是：本发明通过共挤复合模头将两种熔点不同的塑料共同挤出成型，并经过三辊成形机冷却定形，能够一次生产出双层不同材料的复合板材，该复合板材区别于传统胶粘的复合产品，具有无甲醛、无异味，不会造成二次污染的优点，同时设备能够提高生产率，降低制造成本，符合现代工业低能耗、低加工成本的市场需求。
 附图说明
附图1为本发明的主视图；
附图2为本发明的俯视图；
附图3为表层挤出单元的俯视图；
附图4为底层挤出单元的主视图；
附图5为三辊成型机的主视图；
附图6为复合模头的剖视图；
附图7为附图6中A处的局部放大视图；
其中：1、表层挤出单元；101、挤出机；102、换网器；103、计量泵；2、底层挤出单元；201、挤出机；202、换网器；203、计量泵； 204、入料筒；3、复合模头；301、第一本体；302、中间本体；303、第二本体；304、表层调节阻流棒；305、底层调节阻流棒；306、拉紧栓；307、拉紧钩；308、过渡拉钩；309、旋转部；310、拉紧螺母；311、缺口；312、出料口；313、表层流体的入料口；314、底层流体的入料口；331、表层流体挤出通道；332、底层流体挤出通道；333、合流通道；334、底层基面；335、第二表层基面；336、第一表层基面；4、三辊成型机；401、上辊；402、中辊；403、下辊；5、纵向裁切单元；6、牵引机；7、横向裁切单元；8、冷却托架；9、板材输送单元。
 本发明的最佳实施方式
为详细说明发明的技术内容、构造特征、所达成目的及优点，下面将结合实施例予以详细说明。
附图1、2所示为一种复合板材生产设备，用于对两种差异较大的物料，采用模内复合方式，实现一次性挤出成型。该生产设备包括表层挤出单元1、底层挤出单元2、复合模头3、三辊成型机4以及板材输送单元9、裁切单元等。表层挤出单元1和底层挤出单元2的结构相似，均包括挤出机101、换网器102，计量泵103、入料筒等部件组成，参见附图3、4，本实施例中，表层为TPU材料，底层为ABS材料，通过模内复合将两种差异很大的物料复合在一起。
参见附图3、4挤出机101与换网器102相连接，换网器2的出料口与计量泵103相通，复合模头3有两个进料口，分别与表层计量泵103的物料出口以及底层计量泵相连接，两种物料通过复合模头3分层挤出复合在一起，挤出后的复合材料随即进入三辊成型机4。
参见附图6、7所示，共挤复合模头3用于将两种不同材料通过共挤复合。该共挤复合模头3包括第一本体301、第二本体303、夹在第一本体301和第二本体303之间的中间本体302。其中，中间本体302上设有表层流体的入料口313，第一本体301与中间本体302的接触面上，形成表层流体挤出通道331；第二本体303与中间本体302之间形成底层流体的入料口314以及底层流体挤出通道332，其中底层流体的入料口与底层流体挤出通道332位于同一条直线上；第一本体301与第二本体303的下部相对，并且两者之间形成合流通道333以及位于合流通道333下游的出料口312，表层流体挤出通道331的末端与底层流体挤出通道332相接，并在合流通道333的上游汇合，经过出料口312挤出的物料形成表层覆盖在底层上的复合材料，可实现表层及底层一次性挤出成型。底层流体挤出通道332与合流通道333平行，表层流体挤出通道331与合流通道333之间的夹角大于90°。
由于TPU和ABS的熔点不同，温度的不同会极大的改变两种物料的特性，为减弱两种物料之间的彼此影响，和保证TPU和ABS分别保持在最适宜的复合温度，共挤复合模头采用隔热设计，并配有独立温度调节系统。该共挤复合模头还包括用于精确调节各流道温度的温度调节系统，该温度调节系统包括用于调节第一本体301温度的第一流体加热器、用于调节第二本体303温度的第二流体加热器和用于加热中间本体302的第三加热装置。第一流体加热器、第二流体加热器和第三加热装置，可选择电加热、循环水/油加热等方式实现，本实施例中，第一流体加热器和第二流体加热器采用电热棒加热，而第三加热装置采用循环热油加热，第三加热装置包括开设在中间本体302上的油孔和为油孔提供循环热油的加热系统。这样设置的好处是，第一流体加热器和第二流体加热器可以精确地调节表层流体和底层流体的温度，使二者保持在融融状态，而第三加热装置可以调节中间本体的温度，并保持中间本体的温度高于第一本体和第二本体。在本发明的最佳实施例中，所述的第一本体的温度保持在230℃左右，第二本体的温度保持在190℃~200℃左右，中间本体的温度保持在260℃左右，这样使表层物料TPU和底层物料ABS在模内复合的温度更高，并使两种物料在复合时仍保持一定的温度差。
为实现复合材料各层厚度的精确调节，第一本体301上可移动的设置有至少部分伸入在表层流体挤出通道331内的表层调节阻流棒304，中间本体302上可移动的设置有至少部分伸入在底层流体挤出通道332内的底层调节阻流棒305，通过调节表层调节阻流棒304和底层调节阻流棒305伸入挤出通道的位移，调节挤出通道的宽度，进而调节各材料的厚度。此外，第一本体301与第二本体303在靠近出料口312的一端部形成口模，第一本体301开设有一个U形缺口311，缺口311靠近出料口312的一侧开设有凹槽，缺口311的另一侧开设有限位孔，拉紧机构包括穿在限位孔内的拉紧栓306、固定在拉紧栓306一端部上的拉紧钩307以及两端部分别钩住拉紧钩307与凹槽的过渡拉钩308，拉紧栓306的另一端同轴设置有能够转动的旋转部309，旋转部309上开设有外螺纹，第一本体301上设置有拉紧螺母310，旋转部309螺纹装配在拉紧螺母310上，转动拉近栓306，可以调节缺口311的大小，从而实现对口模开口大小的调节。本发明在模具单侧进行阻流棒调节，可以确保两层熔体出料均匀，并可在口模出口处进行复合材料总厚度的微调，调节方式相对传统模具简单方便。
通过阻流棒305调节材料的厚度，会同时影响挤出机内的压力，为保证挤出单元系统内的压力稳定，两台挤出机分别配备一台齿轮泵，通过PLC实现压力闭环控制，确保熔体进入模腔后压力稳定，可实现出料均匀，确保片材厚薄一致。
进一步的说，第二本体303上与中间本体302和第一本体301相接触的表面上具有底层基面334，第一本体301上具有第一表层基面336，第一表层基面336与底层基面334围成合流通道333；中间本体302上具有第二表层基面335，底层基面334与第二表层基面335形成第二流体通道332，第一表层基面336相对于第二表层基面335远离第二本体303，也就是说底层基面334到第一表层基面336之间的距离大于底层基面334到第二表层基面335的距离，使表层材料能够顺利复合在底层材料的表面。优选的，表层流体挤出通道、底层流体挤出通道和合流通道中均具有至少一段横截面增大的松弛段，当物料从流道中流过时，物料可以经过压紧-蓬松-压紧的过程，提高韧性，增强性能。
参见附图5，三辊成型机4包括在复合材料的挤出方向上，自上游向下游依次设置的下辊403、中辊402和上辊401，复合模头3的出料口位于中辊402与下辊403之间，从出料口流出的复合材料，从中辊402与下辊403之间进入三辊成形机4，绕过中辊402，再从上辊401与中辊402之间穿出。三辊成型机4上对应上辊401、中辊402和下辊403分别设置有三个前后移动机构，通过前后移动机构可以自由调节上、中、下辊之间的间隙和位置。在三辊成型机4下游还设置有纵向裁切单元5、冷却托架8、横向裁切单元7，纵向裁切单元5用于裁切多余的边料，横向裁切单元7用于将复合材料分切成多段，冷却托架8用于对复合材料进行自然冷却。
由于TPU熔体粘度较大，通过辊压成型会容易黏在辊上，为此，本发明在挤出过程中对接触TPU的中辊进行强制冷却，对上辊及下辊则进行加热，并保持上辊401的温度为50~60℃，下辊403的温度为70~80℃，中辊402的温度为10~20℃恒温，中辊402内充满冷却水，同时上辊401和下辊403的外表面设计为镜面，中辊402的外表面设计为雾面。上辊401、下辊403与中辊402的转向相反。每个辊上都设有独立的辊温控系统，可控制辊筒表面温度，由于每个辊的辊面温度恒定，因此可以对复合模头3挤出的物料起到恒温冷却的作用，有利于获得张力均一、稳定性好的复合材料。因此可以获得平整度高、表面光泽性好的复合板材；同时，中辊适度冷却可以提高成型和牵伸速度，提升产量，节约电源，有利于市场的发展。
从三辊成型机上辊11出来的复合材料经过初步定型后，在通过冷却托架8，进行自然冷却。然后再通过牵引机牵出，将板材牵入到横向裁切单元7的入口处，通过横向裁切单元7将对板材进行分切，分切后的板材再通过板材输送单元9输送到自动堆料台进行堆垛。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡根据本发明精神所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。 

Claims (14)

  1. 一种共挤复合模头，其特征在于：它包括第一本体（301）、第二本体（303）、夹在第一本体（301）和第二本体（303）之间的中间本体（302）以及温度调节系统，所述的第一本体（301）与中间本体（302）之间形成表层流体挤出通道（331），所述的第二本体（303）与中间本体（302）之间形成底层流体挤出通道（332），所述的第一本体（301）与第二本体（303）之间形成合流通道（333）以及位于合流通道（333）下游的出料口（312），所述的表层流体挤出通道（331）和底层流体挤出通道（332）在所述的合流通道（333）的上游汇合，所述的温度调节系统包括用于调节第一本体（301）温度的第一流体加热器、用于调节第二本体（303）温度的第二流体加热器和用于加热中间本体（302）的第三加热装置。
  2. 根据权利要求1所述的共挤复合模头，其特征在于：所述的底层流体挤出通道（332）与所述的合流通道（333）平行，所述的表层流体挤出通道（331）与所述的合流通道（333）之间的夹角大于90°。
  3. 根据权利要求1所述的共挤复合模头，其特征在于：所述的第一本体（301）上可移动的设置有至少部分伸入在所述的表层流体挤出通道（331）内的表层调节阻流棒（304），所述的中间本体（302）上可移动的设置有至少部分伸入在所述的底层流体挤出通道（332）内的底层调节阻流棒（305），所述的第一本体（301）与所述的第二本体（303）在靠近所述的出料口（312）的一端部形成口模。
  4. 根据权利要求1所述的共挤复合模头，其特征在于：所述的第三加热装置包括开设在中间本体（302）上的油孔和为所述的油孔提供循环热油的加热系统。
  5. 根据权利要求1所述的共挤复合模头，其特征在于：所述的中间本体（302）的温度高于所述的第一本体和第二本体。
  6. 根据权利要求1所述的共挤复合模头，其特征在于：所述的第一本体（301）或第二本体（303）上开设有一个U形缺口（311），所述的缺口（311）的口部设置有用于调节所述的出料口（312）的开口大小的拉紧机构。
  7. 根据权利要求6所述的共挤复合模头，其特征在于：所述的缺口（311）开设在第一本体（301）上，且所述的缺口（311）靠近所述的出料口（312）的一侧开设有凹槽，所述的缺口（311）的另一侧开设有限位孔，所述的拉紧机构包括穿在所述的限位孔内的拉紧栓（306）、固定在所述的拉紧栓（306）一端部上的拉紧钩（307）以及两端部分别钩住所述的拉紧钩（307）与所述的凹槽的过渡拉钩（308），所述的拉紧栓（306）的另一端同轴设置有能够转动的旋转部（309），所述的旋转部（309）上开设有外螺纹，所述的第一本体（301）上设置有拉紧螺母（310），所述的旋转部（309）螺纹装配在所述的拉紧螺母（310）上
  8. 根据权利要求1所述的共挤复合模头，其特征在于：所述的第二本体（303）上具有底层基面（334），所述的第一本体（301）上具有第一表层基面（336），所述的第一表层基面（336）与底层基面（334）围成所述的合流通道（333）；所述的中间本体（302）上具有第二表层基面（335），所述的底层基面（334）与第二表层基面（335）形成所述的第二流体通道（332），所述的第一表层基面（336）相对于第二表层基面（335）远离所述的第二本体（303）。
  9. 根据权利要求8所述的共挤复合模头，其特征在于：所述的合流通道具有至少一段横截面增大的松弛段。
  10. 一种复合板材生产设备，其特征在于：它包括表层挤出单元（1）、底层挤出单元（2）、如权利要求1~9中任意一项所述的复合模头（3）、三辊成型机（4）以及板材输送单元（9）；所述的三辊成型机（4）包括自上游向下游依次设置的下辊（403）、中辊（402）和上辊（401），所述的出料口朝向所述的中辊（402）与所述的下辊（403）之间，从所述的出料口流出的复合材料，先后穿过所述的中辊（402）与所述的下辊（403）之间、所述的上辊（401）与所述的中辊（402）之间。
  11. 根据权利要求10所述的复合板材生产设备，其特征在于: 所述的上辊（401）和所述的下辊（403）的外表面为镜面，所述的中辊（402）的外表面为雾面。
  12. 根据权利要求11所述的复合板材生产设备，其特征在于:所述的上辊（401）的温度为50~60℃，所述的下辊（403）的温度为70~80℃，所述的中辊（402）的温度为10~20℃。
  13. 根据权利要求10所述的复合板材生产设备，其特征在于:还包括设置在所述的三辊成型机（4）下游的纵向裁切单元（5）与横向裁切单元（7），所述的纵向裁切单元（5）与横向裁切单元（7）之间设置有用于对复合材料进行自然冷却的冷却托架（8）。
  14. 根据权利要求10所述的复合板材生产设备，其特征在于，所述的三辊成型机（4）上对应所述的上辊（401）、所述的中辊（402）和所述的下辊（403）分别设置有三个前后移动机构。
     
     
PCT/CN2018/078297 2017-05-19 2018-03-07 共挤复合模头以及复合板材生产设备 WO2018210035A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710355792.8 2017-05-19
CN201710355792.8A CN107088999B (zh) 2017-05-19 2017-05-19 Tpu与abs复合板材设备

Publications (1)

Publication Number Publication Date
WO2018210035A1 true WO2018210035A1 (zh) 2018-11-22

Family

ID=59638873

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/078297 WO2018210035A1 (zh) 2017-05-19 2018-03-07 共挤复合模头以及复合板材生产设备

Country Status (2)

Country Link
CN (1) CN107088999B (zh)
WO (1) WO2018210035A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113290820A (zh) * 2021-05-25 2021-08-24 昆明电立电缆有限公司 一种电缆挤出双层免调偏共挤机头及其加工工艺
CN115782117A (zh) * 2022-11-25 2023-03-14 浙江杰伟精密机械有限公司 一种发泡板生产用共挤成型的原料分配装置和方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107088999B (zh) * 2017-05-19 2020-11-10 苏州金纬机械制造有限公司 Tpu与abs复合板材设备
CN111113774A (zh) * 2019-12-30 2020-05-08 河北盛邦兴泰新材料科技有限公司 一种abs-tpu拼装运动地板的制备方法
CN113968056A (zh) * 2021-10-20 2022-01-25 罗马斯精密塑料（苏州）有限公司 一种a/b双层工程合金塑料卷材及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106393628A (zh) * 2016-08-31 2017-02-15 昆山恒光塑胶股份有限公司 Tpu‑abs复合板共挤工艺
CN106515159A (zh) * 2016-11-11 2017-03-22 苏州亨达尔工业材料有限公司 一种tpu‑abs双面板材及其制备工艺
CN107088999A (zh) * 2017-05-19 2017-08-25 苏州金纬机械制造有限公司 Tpu与abs复合板材设备

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207564907U (zh) * 2017-05-19 2018-07-03 苏州金纬机械制造有限公司 Tpu与abs复合板材设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106393628A (zh) * 2016-08-31 2017-02-15 昆山恒光塑胶股份有限公司 Tpu‑abs复合板共挤工艺
CN106515159A (zh) * 2016-11-11 2017-03-22 苏州亨达尔工业材料有限公司 一种tpu‑abs双面板材及其制备工艺
CN107088999A (zh) * 2017-05-19 2017-08-25 苏州金纬机械制造有限公司 Tpu与abs复合板材设备

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113290820A (zh) * 2021-05-25 2021-08-24 昆明电立电缆有限公司 一种电缆挤出双层免调偏共挤机头及其加工工艺
CN115782117A (zh) * 2022-11-25 2023-03-14 浙江杰伟精密机械有限公司 一种发泡板生产用共挤成型的原料分配装置和方法

Also Published As

Publication number Publication date
CN107088999B (zh) 2020-11-10
CN107088999A (zh) 2017-08-25

Similar Documents

Publication Publication Date Title
WO2018210035A1 (zh) 共挤复合模头以及复合板材生产设备
US6186765B1 (en) Apparatus for forming a molded multilayer product
US3559239A (en) Multilayer extrusion die
CN102490380B (zh) 打包带生产方法及成套设备
WO2021056298A1 (zh) 一种在线同步对花共挤spc地板及其生产工艺
CN102490366A (zh) 双挤出流延塑料夹网膜产品连续生产成型工艺及设备
CN101293413A (zh) 高强度减量化聚酯薄膜及其制备方法
CN105599266A (zh) 拉杆箱用聚丙烯复合改性挤出板材的生产装置及方法
CN103786323A (zh) 三层铝塑型材共挤工艺
CN101041263A (zh) 汽车部件中金属和塑料复合零件的制造方法
CN102689431B (zh) 一种软硬塑料异型材共挤出模具
CN106393628A (zh) Tpu‑abs复合板共挤工艺
CN106863735A (zh) 一种多层塑料板材的挤出方法及其挤出装置
CN104149372A (zh) 一种轮胎胶片贴合装置
CN207564907U (zh) Tpu与abs复合板材设备
CN213322169U (zh) 板材生产线
CN104260308A (zh) 塑料异型材及密封胶条的共挤成型方法
CN104002459B (zh) 一种双面四层整芯阻燃输送带复合共挤涂覆模具
CN203831759U (zh) 一种双面四层整芯阻燃输送带复合共挤涂覆模具
CN204278440U (zh) 软硬共挤密封用风道护板挤出装置
CN208180198U (zh) 一种聚乙烯/evoh共挤出模具
CN203305494U (zh) 一种塑料管材共挤挤出模具
CN210477731U (zh) 一种pvdc吹膜模头
CN112848203B (zh) 一种复合共挤模具
CN218640285U (zh) 复合平模头

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18801760

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18801760

Country of ref document: EP

Kind code of ref document: A1