Extrusion die for heat shrink tube production

Abstract

The utility model provides an extrusion die for heat shrink tube production, which comprises a fixing ring, the inside of the fixing ring is fixedly connected with a fixing block through a fixing plate, one side of the fixing block close to an extrusion head is fixedly connected with an auxiliary block, the other side of the fixing block is fixedly connected with a screw joint column, and the fixing ring is fixedly connected with a mouth die main body through a long bolt. The end, close to the fixing ring, of the inner side face of the die body is fixedly connected with the heating assembly through a groove, meanwhile, the forming assembly is fixedly connected with the fixing block through a screw joint column and composed of a flow guide column and a forming column, and the surface of the forming column is symmetrically connected with protruding plates. According to the extrusion die, through the cooperation of the fixing ring, the fixing plate, the fixing block, the auxiliary block and the forming assembly, the pressure borne by the interior of the extrusion die during heat shrink tube production can be effectively reduced, and then the probability that the extrusion die is accidentally damaged can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat shrink tube technology, in particular to an extrusion die for producing heat shrink tubes. Background Art

[0002] Heat shrink tubing is a special polyolefin heat shrink tubing, also known as EVA material. The outer layer is made of high-quality soft cross-linked polyolefin material and the inner layer is composited with hot melt adhesive. The outer layer material has the characteristics of insulation, corrosion resistance, and wear resistance, while the inner layer has the advantages of low melting point, waterproof sealing, and high adhesion. The conventional heat shrink tubing extrusion molding device consists of an extruder, a die, and a molding die. The traditional die is connected and molded in one piece by a die, a core die, and a die adjustment part. However, the inner surface of common heat shrink tubing is smooth. When the heat shrink tubing is heated and shrinks from one end to the other, the air inside the tubing is easily discharged. However, if the tubing is heated and shrinks from both ends simultaneously, the air inside the tubing is blocked inside the tubing, which is easy to generate bubbles after shrinkage, affecting the fit of the heat shrink tubing after shrinkage. At the same time, when the heat shrink tubing is extruded, it is easy to increase the burden on the internal components of the mold, increase the probability of deformation, damage, or positional displacement of the internal structure of the mold, thereby reducing the quality of the heat shrink tubing. Utility Model Content

[0003] In order to overcome the defects of the prior art, an extrusion die for producing a heat shrink tube is provided to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, an extrusion die for producing heat shrinkable tubes is provided, comprising: a fixing ring, which is fixedly connected to the surface of the extruder through an extrusion head, the interior of the fixing ring is fixedly connected to a fixing block through a fixing plate, and the fixed block is fixedly connected to an auxiliary block on one side close to the extrusion head, and the other side of the fixed block is fixedly connected to a screw column, and the fixing ring is fixedly connected to a die body through a long bolt, and one end of the inner side of the die body close to the fixing ring is fixedly connected to a heating assembly through a groove, and at the same time, a molding assembly is fixedly connected to the fixed block through a screw column, and the molding assembly consists of a guide column and a molding column, and the surface of the molding column is symmetrically connected to the convex plate.

[0005] Preferably, the fixing ring is in a circular ring structure, and six groups of positioning plates are fixed at equal intervals along the circumferential direction around the edge of the fixing ring surface, and the six groups of positioning plates are all in a rectangular structure, and the end faces of the positioning plates are in a fan ring structure.

[0006] Preferably, the sealing layer fixedly connected to the surface of the extrusion head has a circular ring structure, and the size of the sealing layer is adapted to the size of the end face of the extrusion head, and positioning grooves are provided corresponding to the positions of the outer sides of the extrusion head and the sealing layer relative to the positioning plate, and the positioning plate is fixedly connected in the positioning groove by bolts.

[0007] Preferably, the fixed block has a cylindrical structure, and the arc surface of the fixed block is evenly spaced to fix and connect four groups of fixed plates, and the four groups of fixed plates are all rectangular structures, and the cross-section of the fixed plates is a shuttle-shaped structure. At the same time, the fixed plates and the fixed blocks are combined together to form a cross-shaped structure.

[0008] Preferably, the auxiliary block has a hemispherical structure, the diameter of the auxiliary block is equal to the diameter of the fixed block, and the screw column to which the fixed block is fixedly connected has a cylindrical structure.

[0009] Preferably, the die body is in a cylindrical structure, the heating component fixedly connected to the inner side of the die body is in a circular ring structure, and the inner side of the heating component and the inner side of the die body are in the same plane.

[0010] Preferably, the guide column in the forming assembly has a truncated cone structure, and the forming column has a cylindrical structure, and the larger end of the guide column is fixedly connected to the forming column, and the smaller end of the guide column is screwed to the screw column through the opened screw groove, and at the same time, the end of the guide column close to the fixed block is fixedly connected to the fastening layer through the groove, the fastening layer has a circular ring structure, and the arc surface of the forming column is fixedly connected to multiple groups of convex plates at equal intervals along the circumferential direction, and the convex plates have a long strip structure.

[0011] Compared with the prior art, the beneficial effect of the present invention is that: through the cooperation of the die body and the convex plate in the molding assembly, the extrusion mold can leave an exhaust groove inside the heat shrink tube when producing it, thereby effectively enhancing the fitting effect of the heat shrink tube when in use and reducing the chance of bubbles being generated. At the same time, through the cooperation of the fixing ring, fixing plate, fixing block, auxiliary block and molding assembly, it can effectively reduce the pressure on the internal components of the extrusion mold during the production of heat shrink tubes, thereby reducing the chance of damage to the extrusion mold, and can also assist in enhancing the smoothness of the heat shrink tube during extrusion, thereby improving the quality and production efficiency of the heat shrink tube after extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0013] Figure 2 This is a front view of a fixing ring according to an embodiment of the present invention.

[0014] Figure 3 This is a front view of the die body of an embodiment of the present utility model.

[0015] Figure 4 For the embodiment of the utility model Figure 1 A magnified schematic diagram of .

[0016] In the figure: 1. Extruder; 2. Extrusion head; 3. Positioning plate; 4. Fixing ring; 5. Fixing block; 6. Heating assembly; 7. Molding assembly; 8. Auxiliary block; 9. Fixing plate; 10. Fastening layer; 11. Screw column; 12. Guide column; 13. Molding column; 14. Convex plate; 15. Die body. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Reference Figures 1 to 4 As shown, the utility model provides an extrusion die for producing heat shrinkable tubes, including: a fixed ring 4, which is fixedly connected to the surface of the extruder 1 through the extrusion head 2, and the interior of the fixed ring 4 is fixedly connected to the fixed block 5 through a fixed plate 9, and the fixed block 5 is fixedly connected to the auxiliary block 8 on the side close to the extrusion head 2, and the other side of the fixed block 5 is fixedly connected to the screw column 11, and the fixed ring 4 is fixedly connected to the die body 15 through a long bolt, and the end of the inner side of the die body 15 close to the fixed ring 4 is fixedly connected to the heating component 6 through a groove, and at the same time, the molding component 7 is fixedly connected to the fixed block 5 through the screw column 11, and the molding component 7 is composed of a guide column 12 and a molding column 13, and the surface of the molding column 13 is symmetrically connected to the convex plate 14.

[0019] In this embodiment, the switch of the extruder 1 is turned on, and the extruder 1 squeezes the raw material into the interior of the fixed ring 4 through the extrusion head 2. The raw material can be smoothly squeezed into the interior of the inlet mold body 15 with the cooperation of the arc surface of the auxiliary block 8 and the inclined edges of the fixed plate 9, thereby reducing the pressure on the internal components of the extrusion mold. Under the guidance of the inclined surface of the guide column 12 in the molding assembly 7, the separated raw materials can be re-integrated, and the quality of the raw material when it is extruded into a heat shrinkable tube through the molding column 13 can also be enhanced. At the same time, in the process of the heat shrinkable tube being formed by the molding column 13, the convex plate 14 on the surface of the molding column 13 can symmetrically open multiple groups of through grooves on the inner side of the heat shrinkable tube, thereby leaving corresponding air flow channels inside the heat shrinkable tube, ensuring that the internal airflow of the heat shrinkable tube can be smoothly and completely emptied during use, reducing the probability of bubbles appearing inside the heat shrinkable tube, and enhancing the fit of the heat shrinkable tube after shrinkage.

[0020] As a preferred embodiment, the fixing ring 4 has a circular ring structure, and six groups of positioning plates 3 are fixed at equal intervals along the circumferential direction around the edge of the surface of the fixing ring 4. The six groups of positioning plates 3 are all rectangular structures, and the end faces of the positioning plates 3 are fan-shaped structures.

[0021] In this embodiment, if Figure 1 and Figure 2 The setting of the positioning plate 3 can effectively enhance the stability of the fixed connection between the fixing ring 4 and the extrusion head 2, and reduce the probability of accidental deflection of the fixing ring 4.

[0022] As a preferred embodiment, the sealing layer fixedly connected to the surface of the extrusion head 2 has a circular ring structure, and the size of the sealing layer is adapted to the size of the end face of the extrusion head 2, and positioning grooves are provided corresponding to the positions of the outer side surfaces of the extrusion head 2 and the sealing layer relative to the positioning plate 3, and the positioning plate 3 is fixedly connected in the positioning groove by bolts.

[0023] In this embodiment, if Figure 1 and Figure 2 The sizes of the positioning plate 3 and the positioning groove are matched, which can effectively enhance the stability of the connection between the extrusion head 2 and the fixing ring 4, and the sealing layer is made of rubber material, which can effectively enhance the sealing of the connection between the extrusion head 2 and the fixing ring 4.

[0024] As a preferred embodiment, the fixed block 5 has a cylindrical structure, and the arc surface of the fixed block 5 is fixedly connected to four groups of fixed plates 9 at equal intervals, and the four groups of fixed plates 9 are all rectangular structures, and the cross-section of the fixed plate 9 is a shuttle-shaped structure. At the same time, the fixed plate 9 and the fixed block 5 are combined together to form a cross-shaped structure.

[0025] In this embodiment, if Figure 1 and Figure 2 The inclined surface structure on both sides of the fixed plate 9 can effectively reduce the resistance of the raw materials when flowing through, and can also help enhance the efficiency of the re-convergence and fusion of the raw materials. At the same time, it can also effectively enhance the stability of the connection between the fixed block 5 and the internal fixing ring 4.

[0026] As a preferred embodiment, the auxiliary block 8 has a hemispherical structure, the diameter of the auxiliary block 8 is equal to the diameter of the fixed block 5, and the screw column 11 to which the fixed block 5 is fixedly connected has a cylindrical structure.

[0027] In this embodiment, if Figure 1 The setting of the auxiliary block 8 can effectively reduce the impact force of the raw material when it impacts the internal components of the fixing ring 4, and then effectively reduce the pressure on the internal components of the extrusion mold, and further reduce the deformation, damage or position displacement of the internal components of the extrusion mold, thereby ensuring the quality of the heat shrink tube after extrusion molding.

[0028] As a preferred embodiment, the die body 15 is a cylindrical structure, the heating component 6 fixedly connected to the inner side of the die body 15 is a circular ring structure, and the inner side of the heating component 6 and the inner side of the die body 15 are in the same plane.

[0029] In this embodiment, if Figure 1 and Figure 3 The inner side surfaces of the heating component 6, the fixing ring 4 and the die body 15 are all in the same plane, which can effectively reduce the resistance of the raw material when flowing inside the extrusion die and improve the smoothness of the raw material flow. At the same time, the setting of the heating component 6 can also assist in heating the raw material to avoid the problem of solidification of the raw material due to too low temperature.

[0030] As a preferred embodiment, the guide column 12 in the molding assembly 7 has a truncated cone structure, and the molding column 13 has a cylindrical structure, and the larger end of the guide column 12 is fixedly connected to the molding column 13, and the smaller end of the guide column 12 is screwed to the screw column 11 through the opened screw groove. At the same time, the end of the guide column 12 close to the fixed block 5 is fixedly connected to the fastening layer 10 through the groove. The fastening layer 10 has a circular ring structure, and the arc surface of the molding column 13 is fixedly connected to multiple groups of protrusions 14 at equal intervals along the circumferential direction, and the protrusions 14 have a long strip structure.

[0031] In this embodiment, if Figure 1 and Figure 3 The structural setting of the guide column 12 can not only effectively improve the efficiency of the heat shrinkable tube extrusion molding, but also help enhance the quality of the heat shrinkable tube wall. At the same time, the setting of the fastening layer 10 can help enhance the stability of the connection between the molding component 7 and the fixing block 5. The setting of the convex plate 14 enables the corresponding exhaust groove to be opened inside the heat shrinkable tube, and the upper surface of the convex plate 14 is inclined downward at one end close to the guide column 12, so that the convex plate 14 can gradually open a through groove on the inner side of the heat shrinkable tube, reducing the interference of the convex plate 14 on the extrusion molding of the heat shrinkable tube, thereby ensuring the overall quality of the heat shrinkable tube.

[0032] The extrusion die for producing heat shrinkable tubes of the present invention can effectively reduce the pressure on the inside of the extrusion die during the production of heat shrinkable tubes through the cooperation of the fixing ring 4, the fixing plate 9, the fixing block 5, the auxiliary block 8 and the forming assembly 7, thereby effectively reducing the probability of accidental damage to the extrusion die. In addition, the setting of the convex plate 14 enables multiple groups of through grooves to be symmetrically opened inside the heat shrinkable tube, thereby improving the exhaust efficiency inside the heat shrinkable tube. At the same time, the extruder 1 and the heating assembly 6 are both common brands and models on the market, and the heating assembly 6 has its own temperature sensor, thereby realizing automatic heating and heat preservation of the heating assembly 6.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion die for producing heat shrink tubing, comprising: A fixing ring (4) is fixedly connected to the surface of the extruder (1) through the extrusion head (2), characterized in that: the interior of the fixing ring (4) is fixedly connected to the fixing block (5) through a fixing plate (9), and the fixing block (5) is fixedly connected to the auxiliary block (8) on one side close to the extrusion head (2), and the other side of the fixing block (5) is fixedly connected to the screw column (11), and the fixing ring (4) is fixedly connected to the die body (15) through a long bolt, and the end of the inner side surface of the die body (15) close to the fixing ring (4) is fixedly connected to the heating component (6) through a groove, and the molding component (7) is fixedly connected to the fixing block (5) through the screw column (11), and the molding component (7) is composed of a guide column (12) and a molding column (13), and the surface of the molding column (13) is symmetrically connected to the convex plate (14).

2. The extrusion die for producing heat shrinkable tubes according to claim 1, characterized in that: The fixing ring (4) has a circular ring structure, and six groups of positioning plates (3) are fixed at equal intervals around the edge of the surface of the fixing ring (4) along the circumferential direction, and the six groups of positioning plates (3) are all rectangular structures, and the end faces of the positioning plates (3) are fan-shaped ring structures.

3. The extrusion die for producing heat shrinkable tubes according to claim 1, characterized in that: The sealing layer fixedly connected to the surface of the extrusion head (2) has a circular ring structure, and the size of the sealing layer is adapted to the size of the end face of the extrusion head (2). Positioning grooves are provided on the outer side surfaces of the extrusion head (2) and the sealing layer relative to the positioning plate (3), and the positioning plate (3) is fixedly connected in the positioning groove by bolts.

4. The extrusion die for producing heat shrinkable tubes according to claim 1, characterized in that: The fixed block (5) is cylindrical in structure, and the arc surface of the fixed block (5) is fixedly connected to four groups of fixed plates (9) at equal intervals, and the four groups of fixed plates (9) are all rectangular in structure, and the cross section of the fixed plate (9) is a shuttle-shaped structure. At the same time, the fixed plate (9) and the fixed block (5) are combined together to form a cross-shaped structure.

5. The extrusion die for producing heat shrinkable tubes according to claim 1, characterized in that: The auxiliary block (8) has a hemispherical structure, the diameter of the auxiliary block (8) is equal to the diameter of the fixed block (5), and the screw connection column (11) to which the fixed block (5) is fixedly connected has a cylindrical structure.

6. The extrusion die for producing heat shrinkable tubes according to claim 1, characterized in that: The die body (15) is cylindrical in structure, the heating component (6) fixedly connected to the inner side of the die body (15) is annular in structure, and the inner side of the heating component (6) and the inner side of the die body (15) are in the same plane.

7. The extrusion die for producing heat shrinkable tubes according to claim 1, characterized in that: The guide column (12) in the molding assembly (7) has a truncated cone structure, while the molding column (13) has a cylindrical structure. The larger end of the guide column (12) is fixedly connected to the molding column (13), and the smaller end of the guide column (12) is screwed to the screw column (11) through the screw groove. At the same time, the end of the guide column (12) close to the fixed block (5) is fixedly connected to the fastening layer (10) through the groove. The fastening layer (10) has an annular structure, and the arc surface of the molding column (13) is fixedly connected to multiple groups of convex plates (14) at equal intervals along the circumferential direction. The convex plates (14) have a long strip structure.

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