CN104527022A - Extrusion mixing device in PP foam sheet extruder - Google Patents
Extrusion mixing device in PP foam sheet extruder Download PDFInfo
- Publication number
- CN104527022A CN104527022A CN201410735915.7A CN201410735915A CN104527022A CN 104527022 A CN104527022 A CN 104527022A CN 201410735915 A CN201410735915 A CN 201410735915A CN 104527022 A CN104527022 A CN 104527022A
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- Prior art keywords
- machine barrel
- mixing device
- section
- pipe
- sections
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
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- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
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- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/397—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using a single screw
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/802—Heating
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/82—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an extrusion mixing device in a PP foam sheet extruder, and the extrusion mixing device can realize precise temperature control and even material mixing. The extrusion mixing device includes a cylinder in the shell, the feed end of the cylinder is communicated with a feed pipe, the discharge end of the cylinder is in seal communication with a discharge port equipped discharge casing pipe, the inside of the cylinder wall's sleeve gasket layer is surrounded by several sections of cooling water pipes, the water inlets of the cooling water pipes are all communicated with a water inlet pipe, the cylinder's outer wall corresponding to each section of cooling water pipe is sleeved with a section of heating ring. In the cylinder, one end of the extrusion screw extends into the discharge casing pipe, and the other end of the extrusion screw is in mutual seal with the cylinder inner wall and is driven to rotate by a driving unit. The extrusion screw is equipped with at least two sections of multi-start screw threads, a guide channel is formed between adjacent two-start screw threads in each section of multi-start screw thread, and the longitudinally adjacent guide channels are mutually staggered.
Description
Technical field
The present invention relates to PP foamed board production technical field, be specifically related to adopt liquid carbon dioxide as the mixing device in the PP foamed board extruder of blowing agent.
Background technology
PP foamed board and polypropylene expanded plate, PP foamed board is widely used in multiple fields such as auto parts and components, device fabrication, stationery, packaging, construction materials with its excellent mechanical property, significant effect of heat insulation, good resilience and the feature such as corrosion resistance and recyclable regeneration.Blowing agent is one of the important source material during PP foamed board is produced, and traditional blowing agent is freon.Because freon can produce extremely serious destruction to ozone layer, therefore PP foamed board adopts liquid carbon dioxide replacement fluorine Leon as blowing agent in producing more and more at present.
Liquid carbon dioxide and PP melting charge are undertaken mixing and lowering the temperature by mixing device by one step of producing PP foaming plate the most key using liquid carbon dioxide as blowing agent exactly, wherein liquid carbon dioxide fully mixes equal with PP melting charge by mixing exactly, cooling is then that the material of mixing is cooled to default temperature, is usually cooled to 140 DEG C from 180 DEG C.But, the mixing device of the PP foamed board used when producing PP foamed board at present using liquid carbon dioxide as blowing agent, the lack of homogeneity of its liquid carbon dioxide blended and PP melting charge, and blending shear forces makes the temperature of liquid carbon dioxide and PP melting charge constantly rise in mixed process, be difficult to the temperature of charge after having mixed accurately to control at required 140 DEG C, thus greatly reduce performance and the quality of PP foaming plate.
Summary of the invention
The technical issues that need to address of the present invention are: provide one that liquid carbon dioxide can be made fully to mix with PP melting charge, and can guarantee that the temperature of charge mixed accurately controls to extrude mixing device in the PP foamed board extruder of set temperature value.
For solving the problem, the technical solution used in the present invention is: extrude mixing device in PP foamed board extruder, comprise: be arranged on the housing in frame, mixing device is extruded in PP foamed board extruder, comprise: be arranged on the housing in frame, in housing, level runs through and is provided with machine barrel, the two ends of machine barrel are respectively feed end and discharge end, feed pipe is communicated with on the machine barrel of feed end, machine barrel discharge end is communicated with the discharging bobbin seal of the band discharging opening of hull outside, the barrel of the machine barrel between feed pipe and discharging sleeve pipe adopts spacer Rotating fields, some sections of cooling water pipes are surrounded with in spacer layer, every section of cooling water pipe is provided with water inlet and delivery port, each water inlet is all connected with the water inlet pipe in frame, each delivery port is all connected with the drainpipe in frame, the outer wall of the machine barrel that every section of cooling water pipe is corresponding is all arranged with one section of heating collar, in machine barrel, level runs through and is provided with stock screw, one end of stock screw extend out in discharging sleeve pipe from the discharge end of machine barrel, mutually seal between the other end of stock screw and the machine barrel feed end inwall outside feed pipe, and stretch out from machine barrel feed end and driven by the drive unit frame, stock screw between feed pipe and discharging sleeve pipe is provided with the material extrusion screw thread for feeding, material extrusion screw thread is made up of the longitudinal helical arrangement successively of at least two sections of multiple threads, a deflector chute is formed between two head threads adjacent in every section of multiple thread, the deflector chute that adjacent two sections of longitudinal directions are adjacent staggers setting mutually, under the driving of drive unit, stock screw can rotate thus the material ordered about in machine barrel constantly moves to discharging opening in machine barrel.
Further, mixing device is extruded in aforesaid PP foamed board extruder, wherein, the position, front end of every section of heating collar side is all connected with the air outlet of a cooling blower, every platform cooling blower is installed on the housing outside corresponding heating collar, the air outlet of every platform cooling blower all with the intracavity inter-connection of corresponding heating collar, the position, rear end of every section of heating collar opposite side is provided with the air outlet be connected with hull outside.
Further, mixing device is extruded in aforesaid PP foamed board extruder, wherein, hermetically-sealed construction between the inwall of stock screw and machine barrel feed end comprises: be sleeved on the sealing ring on stock screw, mutually seal between sealing ring and the inwall of machine barrel, stock screw between sealing ring and feed pipe is provided with the sealing thread preventing material from outwards flowing out, the hand of spiral of sealing thread is consistent with the hand of spiral of material extrusion screw thread.
Further, extrude mixing device in aforesaid PP foamed board extruder, wherein, every section of multiple-threaded length is 2 ~ 4 times of stock screw diameter.
Further, in aforesaid PP foamed board extruder, extrude mixing device, wherein, in spacer layer, be surrounded with six sections of cooling water pipes, machine barrel be provided with accordingly six sections of heating collars, housing is arranged accordingly six cooling blowers.
Further, extrude mixing device in aforesaid PP foamed board extruder, wherein, described drive unit is reducing motor.
Further, extrude mixing device in aforesaid PP foamed board extruder, wherein, described multiple thread is four head threads.
Advantage of the present invention is: on the one hand, some sections of cooling water pipes are surrounded with in the barrel of machine barrel spacer Rotating fields, machine barrel is provided with some sections of heating collars accordingly, actually on such machine barrel be provided with several separate temperature control sections, each temperature control section can independently heat the material in the machine barrel of this length section or cool, thus the temperature of the material in machine barrel is accurately controlled, guarantee that the temperature of charge after having mixed accurately controls at required temperature value, on the other hand stock screw is provided with at least two sections of multiple threads, a deflector chute is formed between two head threads adjacent in every section of multiple thread, longitudinally adjacent deflector chute staggers setting mutually, the material that a deflector chute in such the last period multiple thread is derived can be extruded and branch to, in two deflector chutes in rear one section of multiple thread that bar deflector chute is longitudinally adjacent therewith, the process that material moves from feed end to discharge end is exactly that material is by the process of constantly extruding shunting mixing, material obtains and mixes fully in the process being constantly extruded shunting, which greatly enhances the uniformity of mixed material, thus substantially increase quality and the performance of finished product PP sheet material.
Accompanying drawing explanation
Fig. 1 is the structural representation extruding mixing device in PP foamed board extruder of the present invention.
Fig. 2 is the structural representation that Fig. 1 overlooks direction.
Fig. 3 is the cooling blower shown in the left apparent direction of Fig. 1 and the syndeton schematic diagram between heating collar.
Fig. 4 is the structural representation of machine barrel in Fig. 1.
Fig. 5 is the structural representation of stock screw in Fig. 1.
Fig. 6 is two sections of multiple-threaded deployed configuration schematic diagrames on stock screw in Fig. 5.
Fig. 7 is the Hermetical connecting structure schematic diagram of the feed end of stock screw and machine barrel.
Detailed description of the invention
Below in conjunction with accompanying drawing and preferred embodiment, the present invention is described in further detail.
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, mixing device is extruded in PP foamed board extruder, comprise: be arranged on the housing 2 in frame 1, in housing 2, level runs through and is provided with machine barrel 3, the two ends of machine barrel 3 are respectively feed end and discharge end, feed pipe 31 is communicated with on the machine barrel 3 of feed end, the discharging sleeve pipe 4 of the band discharging opening 41 outside machine barrel 3 discharge end and housing 2 is tightly connected mutually, the barrel of the machine barrel 3 between feed pipe 31 and discharging sleeve pipe 4 adopts spacer Rotating fields, some sections of cooling water pipes 5 are surrounded with in spacer layer, every section of cooling water pipe 5 is provided with water inlet and delivery port, each water inlet is all connected with the water inlet pipe 6 in frame 1, each delivery port is all connected with the drainpipe 7 in frame 1, the outer wall of the machine barrel 3 of every section of cooling water pipe 5 correspondence is all arranged with one section of heating collar 8, in machine barrel 3, level runs through and is provided with stock screw 9, one end of stock screw 9 extend out in discharging sleeve pipe 4 from the discharge end of machine barrel 3, mutually seal between the inwall of the other end of stock screw 9 and machine barrel 3 feed end outside feed pipe 31, and stretch out from the feed end of machine barrel 3 and driven by the drive unit frame 1, as shown in Figure 7, in the present embodiment stock screw 9 and machine barrel 3 feed end inwall between hermetically-sealed construction comprise: be sleeved on the sealing ring 13 on stock screw 9, mutually seal between sealing ring 13 and machine barrel 3 inwall, stock screw 9 between sealing ring 13 and feed pipe 31 is also provided with the sealing thread 91 preventing material from outwards flowing out, the hand of spiral of sealing thread 91 is consistent with the hand of spiral of material extrusion screw thread, sealing ring 13 and sealing thread 91 constitute dual-seal, effectively prevent material from outwards flowing out from the feed end of machine barrel 3, described drive unit is reducing motor, as Fig. 5, shown in Fig. 6, stock screw 9 between feed pipe 31 and discharging opening 41 is provided with the material extrusion screw thread for feeding, described material extrusion screw thread is made up of the longitudinal helical arrangement successively of at least two sections of multiple threads 11, the hop count of the material extrusion screw thread on stock screw 9 specifically can be determined according to the length of stock screw 9, in the present embodiment, two sections of multiple threads are preferably four head threads, every section of multiple-threaded length is 2 ~ 4 times of the diameter of stock screw 9, every section of multiple-threaded concrete length can be determined according to actual needs, a deflector chute 111 is formed between two head threads adjacent in every section of multiple thread 11, the deflector chute 111 that longitudinal direction in adjacent two sections of multiple threads is adjacent staggers setting mutually, under the driving of reducing motor, stock screw 9 can rotate in machine barrel 3, thus the material ordered about in machine barrel 3 constantly moves to discharging opening 41 direction.In the present embodiment, the position, front end of every section of heating collar 8 side is all connected with the air outlet of a cooling blower 12, every platform cooling blower 12 is installed on the housing 2 outside heating collar 8, the air outlet of every platform cooling blower 12 and the intracavity inter-connection of corresponding heating collar 8, the position, rear end of the opposite side of every section of heating collar 8 is provided with the air outlet 81 be connected with housing 2 outside.In order to more optimize the structure of mixing device, and better control the temperature of material in machine barrel 3, be surrounded with six sections of cooling water pipes 5 in spacer layer in the present embodiment, machine barrel 3 be provided with accordingly six sections of heating collars 8, housing 2 is arranged accordingly six cooling blowers 12.
Operation principle of the present invention is: liquid carbon dioxide and PP melting charge constantly enter in machine barrel 3 from feed pipe 31, and reducing motor drives stock screw 9 to rotate, thus the material in machine barrel 3 is constantly moved to discharging opening 41 direction.Because deflector chute 111 that the longitudinal direction in two sections of multiple threads adjacent on stock screw 9 is adjacent staggers setting mutually, the material that a deflector chute 111 in such the last period multiple thread 11 is derived can be extruded and branch to, in two deflector chutes in rear one section of multiple thread that bar deflector chute 111 is longitudinally adjacent therewith, the process that material moves from feed end to discharge end is exactly that material is by the process of constantly extruding shunting mixing, on stock screw 9, multiple thread hop count is more, the number of times of extruding shunting mixing is more, mixing of materials is also more abundant, more even, material obtains and mixes fully in the process being constantly extruded shunting, be completely mixed fully when time in material to discharging sleeve pipe 4, the uniformity completing mixed material is very good.
Owing to being surrounded with six sections of cooling water pipes 5 in spacer layer in the present embodiment, machine barrel 3 is provided with accordingly six sections of heating collars 8, housing 2 is arranged accordingly six cooling blowers 12, actually on such machine barrel 3 be provided with six separate temperature control sections, each temperature control section can independently heat the material in the machine barrel 3 of corresponding length section or cool, and the cooling water pipe 5 in each temperature control section, heating collar 8 and cooling blower 12 are used for carrying out water-cooled, electrical heating and air-cooled to material respectively.Particularly, when the temperature of charge in the machine barrel 3 of certain temperature control section correspondence is lower, heating collar 8 energising in this temperature control section can be heated the material in this temperature control section machine barrel 3, when temperature of charge in the machine barrel 3 of certain temperature control section correspondence is too high, cooling water pipe 5 in this temperature control section can carry out cooling work, namely cooling water enters in the cooling water pipe 5 of this temperature control section correspondence from water inlet pipe 6, material in the machine barrel 3 that cooling water in cooling water pipe 5 is corresponding with this temperature control section carries out heat exchange, thus the material in the machine barrel 3 of this temperature control section correspondence is lowered the temperature, the water absorbing heat enters after to drainpipe 7 discharges, when water-cooled cooling can not reach temperature control requirement, the cooling blower 12 in this temperature control section can also be started, under the effect of cooling blower 12, air constantly enters to the inner chamber of this heating collar 8 from the position, front end of heating collar 8 side of correspondence, then the continuous position, rear end from this heating collar 8 opposite side is discharged, constantly the heat in heating collar 8 inner chamber of this temperature control section is taken away in air flow process, so just serve the effect of cooling further.Each temperature control section can according to the different temperatures situation of material in the machine barrel 3 of correspondence, independently carry out electrical heating, water-cooled or air-cooled, thus realize controlling better to the temperature of material in machine barrel 3, guarantee the temperature of the material exported after having mixed, from discharging opening 41 accurately to control at required temperature value, thus substantially increase quality and the performance of PP foaming plate.
Claims (7)
- Mixing device is extruded in 1.PP foamed board extruder, comprise: be arranged on the housing in frame, in housing, level runs through and is provided with machine barrel, the two ends of machine barrel are respectively feed end and discharge end, it is characterized in that: on the machine barrel of feed end, be communicated with feed pipe, machine barrel discharge end is communicated with the discharging bobbin seal of the band discharging opening of hull outside, the barrel of the machine barrel between feed pipe and discharging sleeve pipe adopts spacer Rotating fields, some sections of cooling water pipes are surrounded with in spacer layer, every section of cooling water pipe is provided with water inlet and delivery port, each water inlet is all connected with the water inlet pipe in frame, each delivery port is all connected with the drainpipe in frame, the outer wall of the machine barrel that every section of cooling water pipe is corresponding is all arranged with one section of heating collar, in machine barrel, level runs through and is provided with stock screw, one end of stock screw extend out in discharging sleeve pipe from the discharge end of machine barrel, mutually seal between the other end of stock screw and the machine barrel feed end inwall outside feed pipe, and stretch out from machine barrel feed end and driven by the drive unit frame, stock screw between feed pipe and discharging sleeve pipe is provided with the material extrusion screw thread for feeding, material extrusion screw thread is made up of the longitudinal helical arrangement successively of at least two sections of multiple threads, a deflector chute is formed between two head threads adjacent in every section of multiple thread, the deflector chute that adjacent two sections of longitudinal directions are adjacent staggers setting mutually, under the driving of drive unit, stock screw can rotate thus the material ordered about in machine barrel constantly moves to discharging opening in machine barrel.
- 2. in PP foamed board extruder according to claim 1, extrude mixing device, it is characterized in that: the position, front end of every section of heating collar side is all connected with the air outlet of a cooling blower, every platform cooling blower is installed on the housing outside corresponding heating collar, the air outlet of every platform cooling blower all with the intracavity inter-connection of corresponding heating collar, the position, rear end of every section of heating collar opposite side is provided with the air outlet be connected with hull outside.
- 3. in PP foamed board extruder according to claim 1 and 2, extrude mixing device, it is characterized in that: the hermetically-sealed construction between the inwall of stock screw and machine barrel feed end comprises: be sleeved on the sealing ring on stock screw, mutually seal between sealing ring and the inwall of machine barrel, stock screw between sealing ring and feed pipe is provided with the sealing thread preventing material from outwards flowing out, the hand of spiral of sealing thread is consistent with the hand of spiral of material extrusion screw thread.
- 4. extrude mixing device in PP foamed board extruder according to claim 1 and 2, it is characterized in that: every section of multiple-threaded length is 2 ~ 4 times of stock screw diameter.
- 5. extrude mixing device in PP foamed board extruder according to claim 1 and 2, it is characterized in that: in spacer layer, be surrounded with six sections of cooling water pipes, machine barrel is provided with accordingly six sections of heating collars, housing is arranged accordingly six cooling blowers.
- 6. extrude mixing device in PP foamed board extruder according to claim 1 and 2, it is characterized in that: described drive unit is reducing motor.
- 7. extrude mixing device in PP foamed board extruder according to claim 1 and 2, it is characterized in that: described multiple thread is four head threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735915.7A CN104527022A (en) | 2014-12-08 | 2014-12-08 | Extrusion mixing device in PP foam sheet extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410735915.7A CN104527022A (en) | 2014-12-08 | 2014-12-08 | Extrusion mixing device in PP foam sheet extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104527022A true CN104527022A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410735915.7A Pending CN104527022A (en) | 2014-12-08 | 2014-12-08 | Extrusion mixing device in PP foam sheet extruder |
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| Country | Link |
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| CN (1) | CN104527022A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106217740A (en) * | 2016-07-22 | 2016-12-14 | 朱昭林 | A kind of polyurethane foaming machine material feeding rifle |
| CN107848183A (en) * | 2015-07-08 | 2018-03-27 | 麦克赛尔株式会社 | Method and apparatus for producing foam molded body |
| CN110877450A (en) * | 2019-11-25 | 2020-03-13 | 苏州同大机械有限公司 | Screw extrusion device with air cooling function |
| CN112140506A (en) * | 2019-06-26 | 2020-12-29 | 宝天高科（广东）有限公司 | PVC low foaming board setting device |
| CN114454455A (en) * | 2022-02-14 | 2022-05-10 | 江西华缆科技有限公司 | Cable three-layer supply forming equipment |
-
2014
- 2014-12-08 CN CN201410735915.7A patent/CN104527022A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107848183A (en) * | 2015-07-08 | 2018-03-27 | 麦克赛尔株式会社 | Method and apparatus for producing foam molded body |
| CN106217740A (en) * | 2016-07-22 | 2016-12-14 | 朱昭林 | A kind of polyurethane foaming machine material feeding rifle |
| CN112140506A (en) * | 2019-06-26 | 2020-12-29 | 宝天高科（广东）有限公司 | PVC low foaming board setting device |
| CN110877450A (en) * | 2019-11-25 | 2020-03-13 | 苏州同大机械有限公司 | Screw extrusion device with air cooling function |
| CN114454455A (en) * | 2022-02-14 | 2022-05-10 | 江西华缆科技有限公司 | Cable three-layer supply forming equipment |
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Application publication date: 20150422 |