CN219486634U - Extrusion molding production equipment for high polymer plate - Google Patents
Extrusion molding production equipment for high polymer plate Download PDFInfo
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- CN219486634U CN219486634U CN202320803917.XU CN202320803917U CN219486634U CN 219486634 U CN219486634 U CN 219486634U CN 202320803917 U CN202320803917 U CN 202320803917U CN 219486634 U CN219486634 U CN 219486634U
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- 238000001125 extrusion Methods 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 229920000642 polymer Polymers 0.000 title claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 71
- 238000010438 heat treatment Methods 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims abstract description 54
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 238000007493 shaping process Methods 0.000 claims abstract description 20
- 238000000641 cold extrusion Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims description 35
- 239000000523 sample Substances 0.000 claims description 16
- 238000003490 calendering Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 11
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 7
- 238000009529 body temperature measurement Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 3
- LYKJEJVAXSGWAJ-UHFFFAOYSA-N compactone Natural products CC1(C)CCCC2(C)C1CC(=O)C3(O)CC(C)(CCC23)C=C LYKJEJVAXSGWAJ-UHFFFAOYSA-N 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 14
- 239000000155 melt Substances 0.000 abstract description 11
- 238000009826 distribution Methods 0.000 abstract description 9
- 239000002861 polymer material Substances 0.000 abstract description 7
- 238000001746 injection moulding Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 230000010006 flight Effects 0.000 description 3
- 238000010583 slow cooling Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses extrusion molding production equipment of a high polymer plate, which relates to the technical field of molding equipment of plastic high polymer materials and solves the technical defects of low product quality and poor performance of the molded plate caused by uneven field distribution and concentrated internal stress of the plasticized material in the prior equipment, wherein the technical scheme comprises the following steps: screw extruder, cold extrusion die, calibrating device, conveyer and cutting device, cold extrusion die's panel die cavity includes samming narrow cavity section and shaping extrusion section, is equipped with samming guiding gutter on the samming narrow cavity section, and cutting device's discharge end one side still is equipped with heating heat preservation device and heat sink that is used for shaping panel stress release in proper order. According to the utility model, the injection molding pressure is increased through the material-equalizing narrow cavity section, and the melt distribution is promoted through the material-equalizing diversion trench, so that the homogeneity of the formed plate is improved; meanwhile, the formed plate is heated, insulated and cooled by the heating and heat-preserving device and the cooling device, so that the stress concentration of the plate is eliminated, and the functional characteristics of the plate product are improved.
Description
Technical Field
The utility model relates to the technical field of molding equipment of plastic polymer materials, in particular to extrusion molding production equipment of polymer plates.
Background
The plastic polymer material is widely used in various fields in production and life, and the molding processing method mainly comprises injection molding, extrusion molding, compression molding, blow molding, calendaring, foaming and the like, wherein the extrusion molding has high efficiency and good continuity, is suitable for large-scale continuous production and manufacture, is beneficial to reducing the molding cost of the plastic polymer material, and is particularly widely applied. The extrusion molding production equipment used for producing the polymer plate generally comprises a screw extruder for plasticizing and extruding raw materials, a cold-pushing extrusion die for shaping and extruding molten plasticizing materials, a calibration device for calibrating an extruded molding plate, a conveying device for conveying the calibrated molding plate and a cutting device for cutting the molding plate.
In the extrusion molding process, various factors such as melt field distribution, cooling shaping temperature curve, stress change and the like can influence the aggregation state structure and chemical structure of the high polymer material, and the quality and performance of the final extrusion molded product are changed. The structural design of the cold-pushing extrusion die of the existing high polymer plate cannot adapt to all quality influence factors, for example, molten plasticizing materials entering from a feeding channel are not easy to uniformly flow to two sides of a plate die cavity because of being influenced by a cooling system, after the extrusion molding production equipment is used for a period of time, aggregation of low-temperature plasticizing materials in the middle of the feeding end of the plate die cavity is intensified, the difference of melt flow velocity fields is increased, so that the field quantity of the molten plasticizing materials in the plate die cavity is unevenly distributed, the melt flow resistance is further increased, wall surface sliding is caused, and further the uniformity of molded plates is poor and the product quality is low.
In addition, in the cooling and shaping process of the plasticized material by the cold extrusion die, stress in the material is extremely easily concentrated due to quenching, and the existing equipment is generally not provided with a stress release device after shaping, so that the tensile strength, bending strength and impact strength of the shaped plate are relatively low, the thermal deformation temperature is low, the quality of a high-molecular plate product is seriously influenced, and the product performance is reduced.
Disclosure of Invention
In summary, the utility model aims to solve the technical problems of unreasonable structural design, uneven field distribution of plasticized materials, poor homogeneity of formed plates, relatively low tensile strength, bending strength, impact strength, thermal deformation temperature and the like caused by too concentrated and incomplete release of internal stress of materials in the cooling and shaping process of the traditional extrusion molding production equipment of the polymer plates, and further low product quality and poor performance of the formed plates.
In order to solve the technical defects of the utility model, the technical scheme adopted is that extrusion molding production equipment of a polymer plate sequentially comprises a screw extruder, a cold-pushing extrusion die, a calibrating device, a conveying device and a cutting device from a raw material feeding end to a molding plate discharging end, and is characterized in that: the cold-pushing extrusion die comprises a plate die cavity, wherein the plate die cavity comprises a material-equalizing narrow cavity section and a forming extrusion section, and a material-equalizing diversion trench for diversion of the entered melt to two sides of the plate die cavity and the forming extrusion section is arranged at the bottom of the feeding end of the material-equalizing narrow cavity section. The cutting device is characterized in that a heating and heat-preserving device and a cooling device for releasing stress of the formed plate are further arranged on one side of the discharging end of the cutting device in sequence, the heating and heat-preserving device is composed of an upper heating plate, a lower heating plate and an adjusting mechanism A for adjusting a gap between the upper heating plate and the lower heating plate to accommodate the formed plate, and the cooling device is composed of an upper cooling plate, a lower cooling plate and an adjusting mechanism B for adjusting a gap between the upper cooling plate and the lower cooling plate to clamp the formed plate.
Further, a screw of the screw extruder is sequentially divided into a feeding section, a melting section, a mixing section, an exhaust section and a homogenizing section from a rear feeding end to a front extrusion end, wherein the ratio of the length L of the screw to the nominal diameter D of the screw is 16-20; the length of the feeding section is 0.31L-0.36L, the length of the melting section is 0.26L-0.30L, the length of the mixing section is 0.074L-0.10L, the length of the exhaust section is 0.12L-0.15L, and the length of the homogenizing section is 0.15L-0.18L.
Further, the mixing section comprises at least two mixing elements which are arranged at intervals and have the same structure, each mixing element is provided with at least four mixing screw edges which are spirally wound within 180 degrees from back to front along the axis of the screw rod, screw edge leads among the mixing screw edges are gradually increased from back to front, and screw groove depths of the mixing screw edges are consistent and are all 0.10D-0.14D.
Further, the cold-pushing extrusion die comprises an upper die plate, a lower die plate and an opening frame, and the upper die plate, the lower die plate and the opening frame are matched to form the plate die cavity; the rear end middle part of opening frame be equipped with the feed channel of screw extruder's discharge end intercommunication, the opening part of front end constitutes the extrusion mouth that is used for shaping panel ejection of compact jointly with the front edge of upper and lower template, and the rear end inside wall of opening frame is indent structure, the homoenergetic guiding gutter locate on the internal surface of lower template and extend along the profile of the rear end inside wall of opening frame, and homoenergetic guiding gutter's groove depth reduces to both sides by the middle part that corresponds the feed channel front end gradually.
Further, the rear part of the opening frame is provided with a calendaring plate which can shield the material homogenizing diversion trench and does not shield the feeding channel, and the calendaring plate, the rear part of the opening frame and the inner surface of the lower die plate jointly form the material homogenizing narrow cavity section.
Furthermore, the inner surfaces of the calendaring plate, the upper template and the lower template are provided with anti-sticking mold plating layers.
Further, the body of the upper template and the lower template, which are close to the plate die cavity, are horizontally and transversely provided with a plurality of heat exchange channels for circulating flow of heat exchange medium, the outer surfaces of the upper template and the lower template, which are away from the plate die cavity, are provided with a plurality of temperature measurement probe holes A which extend vertically to the sides of the heat exchange channels but are not communicated with the heat exchange channels in a matrix manner, and each temperature measurement probe hole A is detachably connected with a temperature sensor A electrically connected with pumping equipment of the heat exchange medium.
Further, the calibrating device comprises an upper roller bracket and a lower roller bracket which are connected with the discharge end of the formed plate of the cold-pushing extrusion die, and a plurality of rotating rollers which are respectively connected with the inner surface sides of the upper roller bracket and the lower roller bracket in a rotating way and are used for correspondingly clamping the formed plate.
Further, the upper heating plate and the lower heating plate of the heating and heat-preserving device are correspondingly and averagely divided into a heating section close to one side of the cutting device and a heat-preserving section close to one side of the cooling device, and the heating section and the heat-preserving section are independently heated and controlled respectively.
Further, the body of the upper cooling plate and the lower cooling plate of the cooling device are horizontally and transversely provided with a plurality of cooling channels for circulating and flowing cooling liquid, the outer surface of the upper cooling plate and the outer surface of the lower cooling plate are provided with a plurality of temperature measuring probe holes B which extend vertically to the side of the cooling channels but are not communicated with the cooling channels in a matrix manner, and each temperature measuring probe hole B is detachably connected with a temperature sensor B electrically connected with pumping equipment of the cooling liquid.
Compared with the prior art, the production equipment has the beneficial effects that: the cold pushing extrusion die's panel die cavity feed end one side is the samming narrow cavity section, and the feed end bottom of samming narrow cavity section is equipped with the samming guiding gutter, can increase the pressure of fuse-element to shaping extrusion section injection molding through the samming narrow cavity section of space relatively narrow and small in the in-service use, the samming guiding gutter of cooperation bottom makes the fuse-element in the samming narrow cavity to the both sides of panel die cavity and shaping extrusion section equipartition simultaneously for the field volume distribution of plasticization material in the die cavity is more even, is showing the homogeneity that has improved shaping panel, has guaranteed the product quality of shaping panel.
The heating and heat-preserving device and the cooling device are additionally arranged at the back of the cutting device, and the gradient slow heating and the subsequent heat preservation can be carried out on the cut formed plate through the heating and heat-preserving device in the actual use process, so that the stress concentration caused by rapid cooling in the material forming and extrusion process is eliminated, and the stress in the plate is thoroughly released; and then the formed plate subjected to stress release is subjected to gradient slow cooling through the cooling device, so that the plate is thoroughly shaped, stress concentration caused by rapid cooling in the cooling process is avoided, the internal stress of the formed plate is thoroughly eliminated in the post-treatment stage, the tensile strength, bending strength and impact strength of a plate product are improved, the heat deformation temperature of the plate product is increased, and the product quality and functional characteristics of the formed plate are further improved.
In addition, the production equipment has the advantages of simple structure, convenient assembly and use, convenient maintenance, high use reliability and low cost, and is favorable for reducing the production cost of the formed plate.
Drawings
FIG. 1 is a schematic view of the overall structure of the production apparatus of the present utility model;
FIG. 2 is a schematic view of the front side structure of the cold extrusion die of the present utility model;
FIG. 3 is an exploded schematic view of the cold extrusion die of the present utility model;
FIG. 4 is a cross-sectional view of the structure of the cold-pressing extrusion die of the present utility model;
FIG. 5 is a schematic view of the screw structure of the screw extruder of the present utility model;
FIG. 6 is a schematic diagram of an assembled structure of the calibration device of the present utility model;
FIG. 7 is a schematic diagram of the heating and heat preserving device and the cooling device of the present utility model.
In the figure: 1. screw extruder, 11, screw, 111, feed section, 112, melt section, 113, mixing section, 1131, mixing element, 1132, mixing screw flight, 114, discharge section, 115, homogenizing section, 2, cold-extrusion die, 21, plate die cavity, 211, cavity section, 212, forming extrusion section, 213, material guide, 22, upper die plate, 23, lower die plate, 24, open-ended frame, 241, feed channel, 242, calendar plate, 25, extrusion orifice, 26, anti-sticking coating, 27, heat exchange channel, 28, temperature sensing probe A,29, temperature sensor A,3, calibration device, 31, upper roller bracket, 32, lower roller bracket, 33, rotating roller, 4, conveyor, 5, cutting device, 6, heating and insulation device, 61, upper heating plate, 62, 63, adjustment mechanism A,64, conveyor roller, 601, heating section, 602, 7, heating device, 71, upper plate, 72, lower plate, 73, adjustment mechanism B,74, temperature sensing probe B, 75, temperature sensing probe B, temperature sensor B,76.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present utility model, the following description will further illustrate the present utility model by way of specific examples, and the specific embodiments adopted in the following examples are only some preferred embodiments of the technical solution of the present utility model, not limiting the present utility model.
Referring to fig. 1 to 4, the extrusion molding production equipment for polymer plates according to the present utility model sequentially comprises a screw extruder 1 for melt extrusion of polymer raw materials from a feeding end of the polymer raw materials to a discharging end of the molded plates, a cold extrusion die 2 for uniformly distributing, shaping and extruding the polymer raw materials, a calibration device 3 for calibrating the extruded molded plates and providing a certain feeding resistance to promote the sufficient filling of the melt in the plate mold cavity, a conveying device 4 for providing assistance for the transportation and transfer of the molded plates, and a cutting device 5 for spacing cutting the molded plates to divide the continuous plates as required. As shown in fig. 2 to 4, the plate die cavity 21 of the cold extrusion die 2 includes a material-equalizing narrow cavity section 211 connected to the discharge end of the screw extruder 1 and a molding extrusion section 212 for cooling, shaping and extruding the plasticized material. Specifically, the bottom of the feeding end of the uniform material narrow cavity section 211 of the plate material die cavity 21 is provided with a uniform material diversion trench 213 for diversion of the entered melt to both sides of the plate material die cavity 21 and the molding extrusion section 212.
Specifically, one side of the discharging end of the cutting device 5 of the production equipment is further provided with a heating and heat-preserving device 6 and a cooling device 7 for releasing stress of the formed plate in sequence, wherein the heating and heat-preserving device 6 is composed of an upper heating plate 61, a lower heating plate 62 and an adjusting mechanism A63 for adjusting a gap between the upper heating plate 62 and the lower heating plate 62 to accommodate the formed plate, and the cooling device 7 is composed of an upper cooling plate 71, a lower cooling plate 72 and an adjusting mechanism B73 for adjusting a gap between the upper cooling plate 72 and the lower cooling plate 72 to clamp the formed plate.
Specifically, referring to fig. 5, the screw 11 of the screw extruder 1 of the production apparatus of the present utility model is divided into a feeding section 111, a melting section 112, a kneading section 113, an exhaust section 114 and a homogenizing section 115 in this order from the rear feeding end to the front extruding end, and the ratio of the total length L of the screw 11 to the nominal diameter D of the screw 11 is 16 to 20. The utility model optimizes and improves the structure of the screw 11, wherein the length of the feeding section 111 is (0.31-0.36) L, the length of the melting section 112 is (0.26-0.30) L, the length of the mixing section 113 is (0.074-0.10) L, the length of the exhaust section 114 is (0.12-0.15) L, and the length of the homogenizing section 115 is (0.15-0.18) L.
Further, referring to fig. 5, the mixing section 113 of the screw 11 according to the present utility model includes at least two mixing elements 1131 with the same structure and arranged at intervals, each mixing element 1131 is provided with at least four mixing flights 1132 which are spirally wound within 180 ° from back to front along the axis of the screw 11, the flight leads between the mixing flights 1132 gradually increase from back to front, and the flight depths of the mixing flights 1132 are uniform and are all (0.10-0.14) D.
The utility model optimizes and improves each function segmented structure of the screw 11 of the screw extruder 1, wherein the lengths of the feeding section 111, the melting section 112, the mixing section 113, the exhaust section 114 and the homogenizing section 115 respectively account for 31% -37%, 26% -30%, 7.5% -10%, 12% -15% and 15% -18% of the total length of the screw 11, and the design reduces the length of the mixing section 113 to the greatest extent while ensuring the plasticizing extrusion efficiency of different plastic polymer materials, thereby providing a length space for the optimized design of other functional section mechanisms and being applicable to plasticizing extrusion of a plurality of different materials. In addition, the structural design of the screw 11 improves plasticizing efficiency of different materials, optimizes the structure of the mixing element 1131, promotes mixing of molten materials through the mixing screw edges 1132 on the mixing element 1131, increases shearing action of the materials by utilizing the mixing screw edges 1132 with gradually increased leads, promotes further plasticizing of the materials, reduces generation of coke materials and bubbles, reduces waste of raw materials and air exhaust difficulty of an air exhaust section 114, ensures mixing and plasticizing effects of different materials, and fundamentally avoids the problems of uneven distribution in a cold extrusion die 2 and poor consistency of formed plates caused by the fact that coke materials, bubbles and the like exist in the melt. In addition, the screw 11 for the extruder has the advantages of simple structure, reliable operation, strong applicability and good plasticizing effect, and is suitable for popularization and application in large-scale plastic polymer material forming and processing enterprises.
Further, referring to fig. 2 to 4, the cold-pushing extrusion die 2 of the production device of the present utility model includes an upper die plate 22, a lower die plate 23 and an open frame 24, and the three die plates are assembled to form the plate die cavity 21. Specifically, the opening frame 24 has a U-shaped structure, a feeding channel 241 is disposed in the middle of the rear end of the back cover and is communicated with the discharge port die end of the screw extruder 1, and the opening at the front end and the front edges of the upper and lower templates 23 form an extrusion port 25 for discharging formed boards together. Specifically, the inner side wall at the rear end of the opening frame 24 is of a concave structure, the material-equalizing diversion trench 213 is arranged on the inner surface of the lower die plate 23 and extends along the contour of the inner side wall at the rear end of the opening frame 24, and the trench depth of the material-equalizing diversion trench 213 is gradually reduced from the middle part corresponding to the front end of the feeding channel 241 to two sides.
Specifically, referring to fig. 3 to 4, a calendaring plate 242 capable of shielding the material homogenizing and guiding slot 213 and not shielding the feeding channel 241 is disposed at the rear portion of the opening frame 24 of the cold-pushing extrusion die 2 of the present utility model, and the calendaring plate 242, the rear portion of the opening frame 24 and the inner surface of the lower die plate 23 together form the material homogenizing slot section 211.
Preferably, the rear part of the homogenizing narrow cavity section 211 formed by the opening frame 24, the upper die plate and the lower die plate and the front part formed by the forming extrusion section 212 adopt a split type structural design, and the design can reduce the difficulty of manufacturing the opening frame 24 and is convenient to assemble and use.
The plate die cavity 21 of the cold-extrusion die 2 of the utility model is composed of a material-equalizing narrow cavity section 211 and a forming extrusion section 212, wherein the material-equalizing narrow cavity section is composed of the rear part of an opening frame 24, a calendaring plate 242 and the inner surface of a lower die plate 23, and the forming extrusion section 212 is composed of the front part of the opening frame 24, the inner surfaces of the upper die plate and the lower die plate. Because the rear part of the opening frame 4 is provided with the calendaring plate 242, the space on one side of the feeding end of the plate die cavity 21 is compressed in height, and then the calendaring plate is matched with the homogenizing guide groove 213 arranged on the lower die plate 23, so that the pressure of the molten plasticizing material entering through the feeding channel 241 is further increased, the molten plasticizing material is automatically caused to flow along the feeding guide groove to two sides of the plate die cavity 21, the molten plasticizing material is favorably uniformly distributed to the molding extrusion section 212 on the front part of the plate die cavity 21, and the space of the homogenizing narrow cavity section 211 is smaller than that of the molding extrusion section, and provides additional injection molding pressure for the molten plasticizing material to the front part of the plate die cavity 21, the effect of uniformly distributing the molten plasticizing material is further improved, the field quantity distribution of the plasticizing material in the plate die cavity 21 is more uniform, the uniformity of the molding plate is remarkably improved, and the product quality of the molding plate is ensured.
Further, referring to fig. 4, the inner surfaces of the rolled plate 242 and the inner surfaces of the upper die plate 22 and the lower die plate 23 of the opening frame 24 of the present utility model are provided with anti-sticking die plating layers 26.
The anti-sticking coating 26 can prevent plasticized materials from adhering to the surface of a plate die cavity of the die in the shaping process, promote the plasticized materials to be uniformly distributed in the plate die cavity, and ensure the uniform distribution effect of melt in the die cavity.
Further, referring to fig. 1 to 2, the body of the upper die plate 22 and the lower die plate 23 of the cold-pushing extrusion die 2, which are close to the plate die cavity 21, are horizontally and transversely provided with a plurality of heat exchange channels 27 for circulating heat exchange medium therethrough, the outer surfaces of the upper die plate 22 and the lower die plate 23, which are away from the plate die cavity 21, are respectively provided with a plurality of temperature measurement probe holes a28 extending vertically to the sides of the heat exchange channels 27 but not communicated with the heat exchange channels, and each temperature measurement probe hole a28 is detachably connected with a temperature sensor a29 electrically connected with a pumping device (not shown) of the heat exchange medium.
According to the utility model, the temperature measuring probe holes A28 which are arranged on the outer surfaces of the upper and lower templates 23 and extend towards the heat exchange channel 27 in the vertical direction are arranged on the outer surfaces of the upper and lower templates, so that the existing temperature sensor arranged on the side edge of the die is optimally adjusted to the front surface of the templates, the accurate measurement of the temperature change condition of the middle part of the plasticizing material in the plate die cavity 21 is realized, the positive and accurate guiding effect is realized on timely and accurate regulation of the circulation rate of the heat exchange medium and regulation of the cooling and shaping effect of the die by pumping equipment, and the problems of poor homogeneity and low quality of the formed plate caused by improper heat exchange and cooling of the plasticizing material are avoided.
Further, referring to fig. 6, the calibrating device 3 of the production apparatus of the present utility model includes an upper roller support 31 and a lower roller support 32 fixedly connected to the discharge ends of the formed sheet material of the upper and lower die plates of the cold-extrusion die 2, respectively, and a plurality of rotating rollers 33 rotatably connected to the inner surfaces of the upper roller support 31 and the lower roller support 32, respectively, for clamping the formed sheet material continuously extruded through the extrusion port 25, respectively.
The continuously extruded formed sheet material is more straight and is attached to the clothing after being extruded by the upper and lower rotary rollers 33, the position of the formed sheet material can be effectively corrected, and the formed sheet material can be pushed by the conveying device 4 to enter the cutting device 5 more accurately, so that the cutting device 5 can accurately cut the sheet material. Simultaneously, the rotating rollers 33 at the upper side and the lower side can provide additional moving resistance for the clamped formed plate, which is beneficial to uniformly distributing and filling the melt in the plate die cavity 21 of the cold-pushing extrusion die 2, and further improves the homogeneity of the formed plate.
Further, referring to fig. 7, the upper heating plate 61 and the lower heating plate 62 of the heating and heat-preserving device 6 of the production apparatus of the present utility model are divided into a heating section 601 near the cutting device 5 and a heat-preserving section 602 near the cooling device 7, where the heating section 601 and the heat-preserving section 602 are independently controlled.
The distance between the upper heating plate and the lower heating plate of the heating and heat preserving device 6 is adjusted by the adjusting mechanism A63, so that the cut formed plate can correspondingly enter the gap between the upper heating plate and the lower heating plate. Preferably, the upper and lower heating plates 62 do not directly contact the formed plate to prevent overheating and melting of the material on the surface of the plate during heating, and in order to ensure the supporting effect of the lower heating plate 62 on the formed plate, a plurality of groups of conveying rollers 64 may be disposed on the surface of the lower heating plate, and the plate is supported and conveyed by the conveying rollers 64 directly contacting the lower bottom surface of the formed plate.
Further, referring to fig. 7, the upper cooling plate 71 and the lower cooling plate 72 of the cooling device 7 of the present utility model are provided with a plurality of cooling channels 74 for circulating the cooling liquid horizontally and transversely penetrating the body, and a plurality of temperature measuring probe holes B75 extending vertically to the side of the cooling channels 74 but not communicating with the cooling channels are arranged on the outer surfaces of the upper cooling plate 71 and the lower cooling plate 72 in a matrix manner, and each temperature measuring probe hole B75 is detachably connected with a temperature sensor B76 electrically connected with a pump-out device (not shown) for the cooling liquid.
The space between the upper cooling plate 71 and the lower cooling plate 72 of the cooling device 7 is adjusted by the adjusting mechanism B73, so that the upper cooling plate 71 and the lower cooling plate 72 can be tightly attached to the formed plate processed by the heating and heat preserving device 6, and the cooling effect of the formed plate on the plate is ensured. The upper cooling plate and the lower cooling plate exchange heat with the plate through the cooling liquid circularly flowing in the cooling channel 74, and the control of the circulation rate of the cooling liquid by the pumping device is guided in an auxiliary way through the detection data of the temperature sensor B76, so that gradient slow cooling of the plate is realized.
In the shaping extrusion process, the internal stress of the formed plate is excessively concentrated due to rapid cooling, the plate is firstly subjected to gradient slow heating through the heating section 601 of the heating and heat preserving device 6, the plate which is pushed in place by the conveying device 4 and subjected to heating is subjected to constant temperature heat preserving treatment through the heat preserving section 602 after a period of time is maintained, the stress concentration in the plate is thoroughly eliminated after a period of time is maintained, the internal stress of the plate is thoroughly released, and then the plate subjected to heat preserving treatment is subjected to gradient slow cooling through the cooling device 7, so that the internal stress of the plate is prevented from being concentrated again, and finally the formed plate product is prepared.
In summary, the production equipment improves the screw structure optimization of the screw extruder, improves the mixing effect of melt state plasticizing materials, avoids coke materials and bubbles from being generated in the melt, and ensures the consistency of the melt after the melt enters the plate die cavity of the cold-pushing extrusion die; by optimizing and improving the plate die cavity structure of the cold-pushing extrusion die, the pressure of the entering melt in the material-homogenizing narrow cavity section is improved, the uniform distribution of the melt to the two sides of the plate die cavity is promoted, the injection molding pressure and efficiency are improved, and the consistency of the field quantity distribution of the melt in the die cavity is ensured; the stress concentration in the formed plate is thoroughly eliminated through the added heating and heat-preserving device and cooling device, the uniformity of field distribution in the melt shaping process is promoted together with the improvements, the uniformity of the formed plate is obviously improved, the characteristics of tensile strength, bending strength, impact strength deviation, heat deformation temperature and the like of the formed plate product are ensured, and the quality of the plate product is improved.
The foregoing examples are merely for the purpose of illustrating the technical solution of the present utility model, and are not intended to limit the embodiments of the present utility model. Various modifications and alterations of this utility model will be apparent to those skilled in the art without departing from the spirit and substance of this utility model, and it is intended to cover all such modifications and alterations as fall within the true scope of this utility model.
Claims (10)
1. Extrusion molding production facility of polymer panel is by raw and other materials feeding one end to shaping panel ejection of compact one end including screw extruder, cold extrusion die, calibrating device, conveyer and cutting device in proper order, its characterized in that: the cold-pushing extrusion die comprises a plate die cavity, a material homogenizing narrow cavity section and a forming extrusion section, wherein a material homogenizing diversion trench for diversion of an entered melt to two sides of the plate die cavity and the forming extrusion section is arranged at the bottom of a feeding end of the material homogenizing narrow cavity section; the cutting device is characterized in that a heating and heat-preserving device and a cooling device for releasing stress of the formed plate are further arranged on one side of the discharging end of the cutting device in sequence, the heating and heat-preserving device is composed of an upper heating plate, a lower heating plate and an adjusting mechanism A for adjusting a gap between the upper heating plate and the lower heating plate to accommodate the formed plate, and the cooling device is composed of an upper cooling plate, a lower cooling plate and an adjusting mechanism B for adjusting a gap between the upper cooling plate and the lower cooling plate to clamp the formed plate.
2. The extrusion molding production equipment of a polymer sheet according to claim 1, wherein: the screw of the screw extruder is sequentially divided into a feeding section, a melting section, a mixing section, an exhaust section and a homogenizing section from a rear feeding end to a front extrusion end, wherein the ratio of the length L of the screw to the nominal diameter D of the screw is 16-20; the length of the feeding section is 0.31L-0.36L, the length of the melting section is 0.26L-0.30L, the length of the mixing section is 0.074L-0.10L, the length of the exhaust section is 0.12L-0.15L, and the length of the homogenizing section is 0.15L-0.18L.
3. The extrusion molding production equipment of the polymer sheet material according to claim 2, wherein: the mixing section comprises at least two mixing elements which are arranged at intervals and have the same structure, each mixing element is provided with at least four mixing screw edges which are spirally wound within 180 degrees from back to front along the axis of the screw rod, screw edge leads between the mixing screw edges are gradually increased from back to front, and the screw groove depths of the mixing screw edges are consistent and are all 0.10D-0.14D.
4. The extrusion molding production equipment of a polymer sheet according to claim 1, wherein: the cold-pushing extrusion die comprises an upper die plate, a lower die plate and an opening frame, and the upper die plate, the lower die plate and the opening frame are matched to form the plate die cavity; the rear end middle part of opening frame be equipped with the feed channel of screw extruder's discharge end intercommunication, the opening part of front end constitutes the extrusion mouth that is used for shaping panel ejection of compact jointly with the front edge of upper and lower template, and the rear end inside wall of opening frame is indent structure, the homoenergetic guiding gutter locate on the internal surface of lower template and extend along the profile of the rear end inside wall of opening frame, and homoenergetic guiding gutter's groove depth reduces to both sides by the middle part that corresponds the feed channel front end gradually.
5. The extrusion molding apparatus for manufacturing a polymer sheet according to claim 4, wherein: the rear part of the opening frame is provided with a calendaring plate which can shield the material homogenizing diversion trench and does not shield the feeding channel, and the calendaring plate, the rear part of the opening frame and the inner surface of the lower template jointly form the material homogenizing narrow cavity section.
6. The extrusion molding apparatus for manufacturing a polymer sheet according to claim 5, wherein: the inner surfaces of the calendaring plate, the upper template and the lower template are respectively provided with an anti-sticking mold plating layer.
7. The extrusion molding apparatus for manufacturing a polymer sheet according to claim 4, wherein: the upper template and the lower template are horizontally and transversely provided with a plurality of heat exchange channels for circulating flow of heat exchange medium, the outer surfaces of the upper template and the lower template, which deviate from the plate die cavity, are respectively provided with a plurality of temperature measurement probe holes A which extend vertically to the sides of the heat exchange channels but are not communicated with the heat exchange channels in a matrix manner, and each temperature measurement probe hole A is detachably connected with a temperature sensor A electrically connected with pumping equipment of the heat exchange medium.
8. The extrusion molding production equipment of a polymer sheet according to claim 1, wherein: the calibrating device comprises an upper roller bracket and a lower roller bracket which are connected with the discharge end of the formed plate of the cold-pushing extrusion die, and a plurality of rotating rollers which are respectively connected with the inner surface sides of the upper roller bracket and the lower roller bracket in a rotating way and are used for correspondingly clamping the formed plate.
9. The extrusion molding production equipment of a polymer sheet according to claim 1, wherein: the upper heating plate and the lower heating plate of the heating and heat-preserving device are correspondingly and averagely divided into a heating section close to one side of the cutting device and a heat-preserving section close to one side of the cooling device, and the heating section and the heat-preserving section are independently heated and controlled respectively.
10. The extrusion molding production equipment of a polymer sheet according to claim 1, wherein: the upper cooling plate and the lower cooling plate of the cooling device are horizontally and transversely provided with a plurality of cooling channels for circulating and flowing cooling liquid, the outer surfaces of the upper cooling plate and the lower cooling plate are provided with a plurality of temperature measuring probe holes B which extend vertically to the sides of the cooling channels but are not communicated with the cooling channels in a matrix manner, and each temperature measuring probe hole B is detachably connected with a temperature sensor B electrically connected with a pumping device of the cooling liquid.
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| CN202320803917.XU CN219486634U (en) | 2023-04-12 | 2023-04-12 | Extrusion molding production equipment for high polymer plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119589877A (en) * | 2025-02-13 | 2025-03-11 | 东莞市钜欣电子有限公司 | A method for manufacturing an injection molded receiver net plastic part |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119589877A (en) * | 2025-02-13 | 2025-03-11 | 东莞市钜欣电子有限公司 | A method for manufacturing an injection molded receiver net plastic part |
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