CN219171629U

CN219171629U - Ultrahigh molecular weight polyethylene lining plate shaping die

Info

Publication number: CN219171629U
Application number: CN202320136195.7U
Authority: CN
Inventors: 卢翔; 许维; 邹月灿; 肖志军; 昌盛
Original assignee: Changsha Jianxin Technology Development Co ltd
Current assignee: Changsha Jianxin Technology Development Co ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-06-13
Anticipated expiration: 2033-01-17

Abstract

The utility model discloses an ultrahigh molecular weight polyethylene lining plate shaping die, which comprises: the lower die is provided with a lower groove and a first strip-shaped groove communicated with the lower groove; the upper die is covered on the lower die and is connected with the lower die through a fastener; the upper die is provided with an upper groove corresponding to the lower groove and a second strip-shaped groove communicated with the upper groove, and the first strip-shaped groove and the second strip-shaped groove are aligned to form a channel for raw materials to be extruded in; the upper groove and the lower groove are aligned to form a fixed mold space for molding a mold; and the leveling device is arranged on the upper die and used for adjusting the flatness of the upper surface of the upper die. According to the ultrahigh molecular weight polyethylene lining plate shaping die, the ultrahigh molecular weight polyethylene lining plate with special shape, long width and high thickness can be manufactured efficiently, and the extruded product is smooth, and the surface is transparent and does not change color; the leveling device is arranged to level the weak part of the upper die, so that the deformation of the upper die is avoided, and the accuracy of the size of the extruded product is further ensured.

Description

Ultrahigh molecular weight polyethylene lining plate shaping die

Technical Field

The utility model relates to the technical field of shaping dies, in particular to an ultra-high molecular weight polyethylene lining plate shaping die.

Background

The ultra-high molecular weight polyethylene is a thermoplastic engineering plastic with excellent comprehensive performance, and is a linear high-density polyethylene with viscosity average molecular weight more than 150 ten thousand. When the ultra-high molecular weight polyethylene is heated to above the melting point, the melt is in the shape of a rubber-like elastomer, the melt viscosity is extremely high, and the fluidity is extremely poor, so that the injection molding or blow molding is difficult to directly carry out, and particularly when the special-shaped, long-width and high-thickness products are continuously manufactured, the traditional compression molding mode is adopted, and the method has the advantages of low cost, simple equipment, less investment and no influence on the relative molecular weight of the ultra-high molecular weight polyethylene; the defects are low production efficiency, high labor intensity, unstable product quality and the like.

At present, under the condition that other molding is not mature, under the condition that the molecular mass is too high and the flow property is extremely poor, the ultra-high molecular weight polyethylene product is processed mainly in a compression molding mode, and after modification research is carried out on the ultra-high molecular weight polyethylene by adding various flow modifiers and other additives in an extrusion molding mode, plates, pipes, bars, various sectional materials, special sectional materials and the like can be extruded, but to realize continuous and efficient manufacturing of special-shaped, long-width and high-thickness lining plates, a reasonable shaping die is developed and designed while the existing extrusion process is improved, the molding of the special-shaped, long-width and high-thickness ultra-high molecular weight polyethylene lining plates is ensured, the continuous and high-efficiency of manufacturing is realized, and qualified products are obtained so as to promote the industrialization of new products.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the ultrahigh molecular weight polyethylene lining plate shaping die is simple in structure and good in practicability, can be used for efficiently manufacturing the ultrahigh molecular weight polyethylene lining plate with special shapes, long widths and high thicknesses, and ensures that the surface of an extruded product is smooth and transparent.

According to the embodiment of the utility model, the ultrahigh molecular weight polyethylene lining plate shaping die comprises: the lower die is provided with a lower groove and a first strip-shaped groove communicated with the lower groove; the upper die is covered on the lower die and is connected with the lower die through a fastener; the upper die is provided with an upper groove corresponding to the lower groove and a second strip-shaped groove communicated with the upper groove, and the first strip-shaped groove and the second strip-shaped groove are aligned to form a channel for raw material extrusion; the upper groove and the lower groove are aligned to form a fixed mold space for molding of a mold; and the leveling device is arranged on the upper die and is used for adjusting the flatness of the upper surface of the upper die.

The ultrahigh molecular weight polyethylene lining plate shaping die provided by the embodiment of the utility model has at least the following beneficial effects:

by arranging the upper die and the lower die which are reasonably arranged and arranging the heating area and the cooling area which are reasonably arranged, the high-efficiency manufacturing of the special-shaped, long-width and high-thickness ultra-high molecular weight polyethylene lining plate can be realized, and the extruded product can be ensured to be smooth, and the surface of the extruded product is transparent and not discolored by performing the chromium plating polishing treatment inside the upper die and the lower die; the leveling device is arranged to level the weak part of the upper die, so that the deformation of the upper die is avoided, and the accuracy of the size of the extruded product is further ensured.

According to some embodiments of the utility model, the bottom of the lower groove is an arched surface arched upwards, and the bottom of the upper groove is a concave surface corresponding to the radian of the arched surface.

According to some embodiments of the utility model, the bottom of the lower groove is further provided with a long groove, and both sides of the long groove are provided with first cooling holes extending along the length direction of the long groove; the cooling hole penetrates through the lower die along the front-rear direction.

According to some embodiments of the utility model, the upper die is provided with a plurality of upper heating holes and a plurality of upper cooling holes, and the upper heating holes and the upper cooling holes penetrate through the upper die along the left-right direction; the lower die is provided with a plurality of lower heating holes and a plurality of lower cooling holes, and the lower heating holes and the lower cooling holes penetrate through the lower die along the left-right direction.

According to some embodiments of the utility model, the plurality of upper heating holes are arranged at one end close to the second strip-shaped groove and are uniformly spaced along the front-rear direction; the upper cooling holes are arranged at one end far away from the second strip-shaped groove and are uniformly arranged at intervals along the front-rear direction; the plurality of lower heating holes and the plurality of upper heating holes are symmetrically arranged in the vertical direction, and the plurality of lower cooling holes and the plurality of upper cooling holes are symmetrically arranged in the vertical direction.

According to some embodiments of the utility model, the upper die is further provided with two detection ports; the upper heating holes and the upper cooling holes divide the upper die into a hot area and a cold area, and the two detection ports are both positioned at the joint of the hot area and the cold area.

According to some embodiments of the utility model, the detection temperature of the detection port near the hot zone is 115 ℃ to 120 ℃, the detection temperature of the detection port near the cold zone is 85 ℃ to 90 ℃, and the difference between the detection temperatures of the two detection ports is not more than 30 ℃.

According to some embodiments of the utility model, the upper cooling holes and the lower cooling holes can be independently controlled to be on-off.

According to some embodiments of the utility model, the leveling device comprises a pressing table and a pressing plate, wherein the pressing plate is arranged above the upper die and is elastically connected with the pressing table; the pressing table is slidably provided with a pressing structure for pressing the pressing plate to the upper die.

According to some embodiments of the utility model, the middle part of the pressing table is provided with a sliding rail, the pressing structure comprises an adjusting piece and an adjusting bolt connected with the adjusting piece in a threaded mode, the adjusting piece is slidably mounted on the sliding rail, and the adjusting bolt penetrates through the adjusting piece and contacts with the pressing plate to press the pressing plate to the upper die.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is an exploded view of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of the assembly of the upper and lower dies of FIG. 1;

FIG. 3 is an exploded view of the leveling device of FIG. 1;

FIG. 4 is a side view of a leveling device according to an embodiment of the present utility model;

fig. 5 is a cross-sectional view of an article of manufacture according to an embodiment of the utility model.

Reference numerals:

lower die 100, lower groove 110, first slot 120, long slot 130, first cooling hole 140, lower heating hole 150, lower cooling hole 160;

upper die 200, upper groove 210, upper heating hole 230, upper cooling hole 240, and detection port 250;

leveling device 300, platform 310, slide rail 311, second engaging lug 312, clamp plate 320, thickening 321, first engaging lug 322, hold-down 330, adjusting member 331, adjusting bolt 332, elastic member 340.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 5, an ultra-high molecular weight polyethylene lining plate shaping mold according to an embodiment of the present utility model includes a lower mold 100, an upper mold 200, and a leveling device 300, the upper mold 200 and the lower mold 100 being connected by a fastener, such as a bolt; the leveling device 300 is installed above the upper die 200 to ensure the flatness of the upper surface of the upper die 200.

Referring to fig. 1 and 2, the lower die 100 is provided with a lower groove 110 and a first bar groove 120 communicating with the lower groove 110, the upper die 200 is pressed against the lower die 100, and is provided with an upper groove 210 corresponding to the lower groove 110 and a second bar groove 220 communicating with the upper groove 210, the first bar groove 120 and the second bar groove 220 being aligned to form a channel for raw material extrusion; the upper and

lower grooves

210 and 110 are aligned to form a fixed mold space for molding the mold; the product made through the stationary mold space is shown with reference to fig. 5.

In some embodiments of the present utility model, the bottom of the lower groove 110 is an upwardly arched surface, and the bottom of the upper groove 210 is a concave surface corresponding to the curvature of the arched surface. Since the product to be manufactured has a certain radian, the bottom of the lower groove 110 is correspondingly provided with an arched surface, and the bottom of the upper groove 210 is correspondingly provided with a concave surface.

It should be appreciated that the inner surface of the upper recess 210 and the inner surface of the lower recess 110 are treated by chrome plating polishing to ensure smooth surfaces of the finished product.

In some embodiments of the present utility model, the bottom of the lower groove 110 is further provided with a long groove 130, and both sides of the long groove 130 are provided with first cooling holes 140 extending along the length direction of the long groove 130; the cooling holes penetrate the lower die 100 in the front-rear direction. Specifically, referring to fig. 1 and 2, the elongated slot 130 is provided because the product to be manufactured has a protruding portion, and thus the corresponding elongated slot 130 is provided. First cooling holes 140 are provided on both sides of the bottom of the long groove 130 to cool and shape the material entering the long groove 130.

In some embodiments of the present utility model, the upper die 200 is provided with a plurality of upper heating holes 230 and a plurality of upper cooling holes 240, and both the upper heating holes 230 and the upper cooling holes 240 penetrate the upper die 200 in the left-right direction; the lower die 100 is provided with a plurality of lower heating holes 150 and a plurality of lower cooling holes 160, and the lower heating holes 150 and the lower cooling holes 160 penetrate the lower die 100 in the left-right direction. Specifically, the plurality of upper heating holes 230 are disposed near one end of the second bar-shaped groove 220 and are uniformly spaced apart in the front-rear direction; the plurality of upper cooling holes 240 are disposed at one end far from the second bar-shaped groove 220 and are uniformly spaced apart in the front-rear direction; the plurality of lower heating holes 150 are disposed symmetrically with the plurality of upper heating holes 230 in the vertical direction, and the plurality of lower cooling holes 160 are disposed symmetrically with the plurality of upper cooling holes 240 in the vertical direction.

In some embodiments of the present utility model, four upper heating holes 230 and four lower heating holes 150 are provided, six upper cooling holes 240 and six lower cooling holes 160 are provided, the four upper heating holes 230 and the four lower heating holes 150 are heated by inserting heating rods, and the six upper cooling holes 240 and the six lower cooling holes 160 are cooled by cooling water. The temperature of the cooling water fed in is preferably not more than 20 ℃.

In some embodiments of the present utility model, the upper cooling holes 240 and the lower cooling holes 160 may be controlled separately to be on/off, i.e. whether cooling water is introduced into each upper cooling hole 240 or each lower cooling hole 160 may be controlled separately, so that the temperature of the mold may be adjusted according to the actual situation, thereby ensuring the stability of the manufactured product.

In some embodiments of the present utility model, the upper die 200 is further provided with two detection ports 250; the upper mold 200 is divided into a hot zone and a cold zone by a plurality of upper heating holes 230 and a plurality of upper cooling holes 240, and both of the inspection ports 250 are located at the junction of the hot zone and the cold zone. Specifically, referring to fig. 2, the detection temperature of the detection port 250 near the hot zone is 115 ℃ to 120 ℃, the detection temperature of the detection port 250 near the cold zone is 85 ℃ to 90 ℃, and the difference between the detection temperatures of the two detection ports 250 is not more than 30 ℃, so that the obtained product is more stable and beautiful.

Referring to fig. 3 and 4, in some embodiments of the present utility model, the leveling device 300 includes a platen 310 and a pressing plate 320, and the pressing plate 320 is installed above the upper mold 200 and is elastically coupled to the platen 310; the platen 310 is slidably mounted with a pressing structure 330 for pressing the platen 320 against the upper die 200. The middle part of the pressing plate 320 is provided with a thickened part 321 so as to be in contact with the pressing structure 330, and simultaneously, the pressing plate 320 is prevented from being bent and deformed. The two opposite sides of the pressing plate 320 are respectively provided with a first connecting lug 322, the pressing table 310 is provided with a second connecting lug 312 corresponding to the first connecting lug 322, and the first connecting lug 322 and the second connecting lug 312 are connected through an elastic piece 340; the elastic member 340 may be a spring or an elastic string.

It is conceivable that the pressing plate 320 is out of contact with the upper die 200 by the elastic member 340 without being subjected to an external force.

In some embodiments of the present utility model, the middle of the platen 310 is provided with a sliding rail 311, and the pressing structure 330 includes an adjusting member 331 and an adjusting bolt 332 screwed to the adjusting member 331, wherein the adjusting member 331 is slidably mounted on the sliding rail 311, and the adjusting bolt 332 passes through the adjusting member 331 and contacts the platen 320 to press the platen 320 against the upper die 200. Specifically, referring to fig. 3 and 4, the platen 310 is composed of two symmetrically arranged platforms, one side of each platform is connected to the upper die 200 by a fastener, and a column foot extending downward is provided to make the platform higher than the surface of the upper die 200, and the other side of each platform is provided with a slide rail 311 extending toward the other platform. The two sides of the adjusting piece 331 are respectively slidably mounted on the sliding rails 311 of the two platforms, and the adjusting bolt 332 is in threaded connection with the adjusting piece 331 and can slide along with the adjusting piece 331.

In some embodiments of the present utility model, the pressing plate 320 is placed at a middle position of the upper mold 200. Because the bottom of the upper groove 210 of the upper die 200 is a concave surface, the middle position of the upper die 200 is the weakest, and is easy to generate arch deformation; pressing the pressing plate 320 to the middle position of the upper die 200 can greatly reduce the probability of arch deformation, thereby improving the stability of the quality of the manufactured product.

In some embodiments of the present utility model, the sliding rail 311 of the platen 310 has a plurality of pressing structures 330 slidably mounted thereon. When leveling, the surface of the upper die 200 is measured by a level gauge, and then the sliding pressing structure 330 presses the adjusting bolt 332 against different positions of the pressing plate 320 according to the measurement result until the upper surface of the upper die 200 is level.

According to the ultrahigh molecular weight polyethylene lining plate shaping mold disclosed by the embodiment of the utility model, by arranging the upper mold 200 and the lower mold 100 which are reasonably arranged and arranging the heating area and the cooling area which are reasonably arranged, the high-efficiency manufacture of the ultrahigh molecular weight polyethylene lining plate with special shape, long width and high thickness can be realized, and the extruded product can be ensured to be smooth, transparent and not discolored on the surface by performing chromium plating polishing treatment inside the upper mold 200 and the lower mold 100; the leveling device 300 is arranged to level the weak part of the upper die 200, so that the deformation of the upper die 200 is avoided, and the accuracy of the size of the extruded product is further ensured.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. An ultra-high molecular weight polyethylene welt design mould, characterized by comprising:

a lower die (100) provided with a lower groove (110) and a first strip-shaped groove (120) communicated with the lower groove (110);

an upper die (200) which is covered on the lower die (100) and is connected with the lower die (100) through a fastener; the upper die (200) is provided with an upper groove (210) corresponding to the lower groove (110) and a second bar-shaped groove (220) communicated with the upper groove (210), and the first bar-shaped groove (120) and the second bar-shaped groove (220) are aligned to form a channel for raw material to be extruded into; the upper groove (210) and the lower groove (110) are aligned to form a fixed mold space for molding of a mold;

and the leveling device (300) is arranged on the upper die (200) and is used for adjusting the flatness of the upper surface of the upper die (200).

2. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 1, wherein: the bottom of the lower groove (110) is an arched surface arched upwards, and the bottom of the upper groove (210) is a concave surface corresponding to the radian of the arched surface.

3. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 2, wherein: the bottom of the lower groove (110) is also provided with a long groove (130), and both sides of the long groove (130) are provided with first cooling holes (140) extending along the length direction of the long groove (130); the cooling hole penetrates the lower die (100) in the front-rear direction.

4. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 1, wherein: the upper die (200) is provided with a plurality of upper heating holes (230) and a plurality of upper cooling holes (240), and the upper heating holes (230) and the upper cooling holes (240) penetrate through the upper die (200) along the left-right direction; the lower die (100) is provided with a plurality of lower heating holes (150) and a plurality of lower cooling holes (160), and the lower heating holes (150) and the lower cooling holes (160) penetrate through the lower die (100) along the left-right direction.

5. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 4, wherein: the plurality of upper heating holes (230) are arranged at one end close to the second strip-shaped groove (220) and are uniformly arranged at intervals along the front-rear direction; the plurality of upper cooling holes (240) are arranged at one end far away from the second strip-shaped groove (220) and are uniformly arranged at intervals along the front-rear direction; the plurality of lower heating holes (150) and the plurality of upper heating holes (230) are symmetrically arranged in the vertical direction, and the plurality of lower cooling holes (160) and the plurality of upper cooling holes (240) are symmetrically arranged in the vertical direction.

6. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 5, wherein: the upper die (200) is also provided with two detection ports (250); the upper die (200) is divided into a hot zone and a cold zone by a plurality of upper heating holes (230) and a plurality of upper cooling holes (240), and two detection ports (250) are positioned at the joint of the hot zone and the cold zone.

7. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 6, wherein: the detection temperature of the detection ports (250) near the hot zone is 115 ℃ to 120 ℃, the detection temperature of the detection ports (250) near the cold zone is 85 ℃ to 90 ℃, and the difference between the detection temperatures of the two detection ports (250) is not more than 30 ℃.

8. The ultra-high molecular weight polyethylene lining board shaping mold according to claim 4 or 5, wherein: the upper cooling holes (240) and the lower cooling holes (160) can be independently controlled to be on-off.

9. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 1, wherein: the leveling device (300) comprises a pressing table (310) and a pressing plate (320), wherein the pressing plate (320) is arranged above the upper die (200) and is elastically connected with the pressing table (310); the pressing table (310) is slidably provided with a pressing structure (330) for pressing the pressing plate (320) against the upper die (200).

10. The ultra-high molecular weight polyethylene lining plate shaping mold according to claim 9, wherein: the middle part of the pressing table (310) is provided with a sliding rail (311), the pressing structure (330) comprises an adjusting piece (331) and an adjusting bolt (332) which is connected with the adjusting piece (331) in a threaded mode, the adjusting piece (331) is slidably mounted on the sliding rail (311), and the adjusting bolt (332) penetrates through the adjusting piece (331) and contacts with the pressing plate (320) so as to press the pressing plate (320) to the upper die (200).