Die cavity structure of extrusion die

Abstract

The utility model discloses a die cavity structure of extrusion die, including die body and opening the die cavity main part in the die body, be provided with the protection mechanism on the die cavity main part, the protection mechanism includes protection piece and two sets of fixing piece, the protection piece includes taper sleeve and side ring, the side ring is fixed at one end of taper sleeve, the side ring is fixed in the taper sleeve. The conical sleeve is positioned inside the die cavity main body; through the designed protection mechanism, the conical sleeve can be conveniently mounted in the die cavity main body during use, so that molten plastic is in contact with the inner wall of the conical sleeve and cannot be in direct contact with the inner wall of the die cavity main body during use of the extrusion die, and the probability that the surface of the inner wall of the die cavity main body is eroded is reduced; in addition, when the conical sleeve is worn after being used for a long time, the conical sleeve can be replaced for use, and the extrusion die is convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of extrusion dies, and particularly relates to the cavity structure of an extrusion die. Background Art

[0002] An extrusion die belongs to a type of forming die. However, its discharging method is realized through the extrusion action. The molten plastic material is shaped into the required shape through the extrusion process. The extrusion die is installed on an extruder for use. The molten material coming out of the discharging port of the extruder enters the cavity in the extrusion die, and then is extruded and formed from one end of the cavity. Some plastic rods are also produced through the extrusion die during the forming process. The cavity in the extrusion die enables the molten plastic of the plastic rod product to be plastically pressed into the required shape.

[0003] When the existing cavity structure of the extrusion die is in use, the cavity in the extrusion die may have the phenomenon of being too large or too small due to wear, which intensifies the roughness of the surface of the cavity inside the extrusion die, resulting in a non-smooth surface and substandard quality. Over time, the inner wall of the cavity appears eroded, affecting the service performance of the cavity and reducing the use effect of the extrusion die. For this reason, we propose the cavity structure of the extrusion die. Summary of the Utility Model

[0004] The purpose of the utility model is to provide the cavity structure of an extrusion die to solve the problem that when the existing cavity structure of the extrusion die is in use, the cavity in the extrusion die may have the phenomenon of being too large or too small due to wear, which intensifies the roughness of the surface of the cavity inside the extrusion die, resulting in a non-smooth surface as mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: The cavity structure of an extrusion die includes a die body and a cavity main body opened inside the die body. A protection mechanism is arranged on the cavity main body. The protection mechanism includes a protection part and two groups of fixing parts. The protection part includes a conical sleeve and a side ring. The side ring is fixed at one end of the conical sleeve. The conical sleeve is located inside the cavity main body. The fixing part includes an L-shaped screw rod and a limiting ring. The end of the L-shaped screw rod passes through the inside of the limiting ring.

[0006] Preferably, two groups of internal thread rings are arranged on the outside of the L-shaped screw rod. The two groups of internal thread rings are located on the two side surfaces of the limiting ring. The internal thread rings are connected to the limiting ring through threads.

[0007] Preferably, a fixing plate is arranged on the outside of the side ring. The L-shaped screw rod is fixed on the fixing plate.

[0008] Preferably, a connecting column is fixedly arranged on the outer part of the limiting ring, and the connecting column is fixed on the mold body.

[0009] Preferably, two groups of screws are arranged on the fixing plate, and the working ends of the screws extend into the inside of the side ring.

[0010] Preferably, two groups of limiting plates are fixedly arranged at the other end of the conical sleeve, two groups of clamping grooves are formed on the surface of the other end of the mold body, and the ends of the limiting plates penetrate into the inside of the clamping grooves.

[0011] Preferably, a fixed flange is fixedly arranged at the other end of the mold body, and a plurality of mounting holes are formed in the fixed flange.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] (1) Through the designed protection mechanism of the utility model, it is convenient to install the conical sleeve in the cavity body during use, so that the molten plastic contacts with the inner wall of the conical sleeve instead of directly contacting with the inner wall of the cavity body during the use of the extrusion die, reducing the probability of erosion on the surface of the inner wall of the cavity body, increasing the service performance of the cavity body, and when the conical sleeve is worn after long-term use, it can be replaced for use, which is convenient for using the extrusion die. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic cross-sectional structure diagram of the mold body and the fixed flange of the utility model;

[0016] Figure 3 is of the utility model Figure 2 amplified schematic structural diagram of part A therein;

[0017] Figure 4 is a schematic left cross-sectional view of the mold body of the utility model;

[0018] Figure 5 is of the utility model Figure 4 amplified schematic structural diagram of part B therein;

[0019] Figure 6 is a schematic structural diagram of the cavity body of the utility model;

[0020] Figure 7 is a schematic structural diagram of the conical sleeve of the utility model;

[0021] In the figure: 100, the mold body; 101, the fixed flange; 102, the cavity main body; 200, the side ring; 201, the tapered sleeve; 202, the fixed plate; 203, the L-shaped screw; 204, the limit ring; 205, the internal thread ring; 300, the card slot; 301, the limit plate. Detailed implementation mode

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0023] Embodiment

[0024] Please refer to Figures 1-7 , the present invention provides a technical solution: the cavity structure of an extrusion mold, including a mold body 100 and a cavity main body 102 opened inside the mold body 100. A protection mechanism is provided on the cavity main body 102. The protection mechanism includes a protection part and two groups of fixing parts. The protection part includes a tapered sleeve 201 and a side ring 200. When in use, the tapered sleeve 201 and the side ring 200 are made of steel. The side ring 200 is fixed at one end of the tapered sleeve 201. The tapered sleeve 201 is located inside the cavity main body 102. The fixing parts include an L-shaped screw 203 and a limit ring 204. When in use, the limit ring 204 is fixed to the mold body 100 through a connecting column. The end of the L-shaped screw 203 passes through the inside of the limit ring 204. Two groups of internal thread rings 205 are arranged outside the L-shaped screw 203. The two groups of internal thread rings 205 are located on both sides of the limit ring 204. The internal thread ring 205 is threadedly connected with the limit ring 204. When in use, the L-shaped screw 203 can be fixed to the limit ring 204 through the two groups of internal thread rings 205. A fixed plate 202 is arranged outside the side ring 200. The L-shaped screw 203 is fixed on the fixed plate 202. A connecting column is fixedly arranged outside the limit ring 204. The connecting column is fixed on the mold body 100. Two groups of screws are arranged on the fixed plate 202. When in use, the fixed plate 202 and the side ring 200 can be disassembled and assembled through the two groups of screws. The working ends of the screws extend into the inside of the side ring 200. Through the designed protection mechanism, it is convenient to install the tapered sleeve 201 in the cavity main body 102 during use, so that the molten plastic in the extrusion mold contacts the inner wall of the tapered sleeve 201 during use and does not directly contact the inner wall of the cavity main body 102, reducing the probability of erosion on the inner wall surface of the cavity main body 102 and increasing the service performance of the cavity main body 102. Moreover, when the tapered sleeve 201 is worn out after long-term use, it can be replaced for use, which is convenient for using the extrusion mold.

[0025] In this embodiment, preferably, two sets of limiting plates 301 are fixedly arranged at the other end of the conical sleeve 201, and two sets of clamping grooves 300 are formed on the surface of the other end of the mold body 100. The ends of the limiting plates 301 penetrate into the interior of the clamping grooves 300. By combining the designed limiting plates 301 and clamping grooves 300, it is convenient to limit the conical sleeve 201 during the process of installing the conical sleeve 201 into the cavity main body 102 of the extrusion die, facilitating the installation of the conical sleeve 201.

[0026] In this embodiment, preferably, a fixed flange 101 is fixedly arranged at the other end of the mold body 100, and a plurality of mounting holes are formed on the fixed flange 101. During use, the fixed flange 101 can be fixed at a suitable position on the extruder by bolts for use.

[0027] The working principle and usage process of the present utility model:

[0028] When the present utility model is in use, one end of the conical sleeve 201 is placed at the right side position of the mold body 100, so that one end of the conical sleeve 201 is aligned with the cavity main body 102, and the two sets of limiting plates 301 on the conical sleeve 201 are aligned with the clamping grooves 300 on the mold body 100. Then, the conical sleeve 201 is moved to the left direction, driving the side ring 200 and the limiting plates 301 to move. Next, the end of the side ring 200 passes through the interior of the conical sleeve 201 and is located at the left side position of the mold body 100. Then, the limiting plates 301 are embedded into the interior of the clamping grooves 300. At this time, the internal thread ring 205 on the left side of the L-shaped screw rod 203 is screwed to a suitable position on the L-shaped screw rod 203. Then, the end of the L-shaped screw rod 203 in the fixing plate 202 passes through the interior of the limiting ring 204. Next, the internal thread ring 205 on the right side of the L-shaped screw rod 203 is screwed to the right side position on the L-shaped screw rod 203. Then, the fixing plate 202 is fixed to the side ring 200 by two screws. Next, the two internal thread rings 205 are both rotated in the opposite direction and tightened. At this time, the conical sleeve 201 can be fixed. When in use, the molten plastic coming out of the extruder enters into the conical sleeve 201 of the extrusion die, does not directly contact the inner wall of the cavity main body 102, and then comes out from the side ring 200 to form a plastic rod. When it is necessary to replace the conical sleeve 201, operate according to the reverse principle described above.

[0029] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A mold cavity structure of an extrusion mold, comprising a mold body (100) and a mold cavity main body (102) opened inside the mold body (100), characterized in that: A protective mechanism is provided on the mold cavity body (102), and the protective mechanism includes a protective part and two groups of fixing parts. The protective part includes a conical sleeve (201) and a side ring (200). The side ring (200) is fixed to one end of the conical sleeve (201). The conical sleeve (201) is located inside the mold cavity body (102). The fixing part includes an L-shaped screw (203) and a limiting ring (204). The end of the L-shaped screw (203) passes through the inside of the limiting ring (204).

2. The mold cavity structure of the extrusion mold according to claim 1, characterized in that: Two groups of internal threaded rings (205) are arranged outside the L-shaped screw rod (203), and the two groups of internal threaded rings (205) are located on two side surfaces of the limiting ring (204), and the internal threaded rings (205) are connected to the limiting ring (204) through threads.

3. The mold cavity structure of the extrusion mold according to claim 2, characterized in that: A fixing plate (202) is arranged outside the side ring (200), and the L-shaped screw (203) is fixed on the fixing plate (202).

4. The mold cavity structure of the extrusion mold according to claim 3, characterized in that: A connecting column is fixedly provided on the outside of the limiting ring (204), and the connecting column is fixed on the mold body (100).

5. The mold cavity structure of the extrusion mold according to claim 4, characterized in that: Two sets of screws are arranged on the fixing plate (202), and the working ends of the screws extend to the inside of the side ring (200).

6. The mold cavity structure of the extrusion mold according to claim 5, characterized in that: Two groups of limiting plates (301) are fixedly arranged at the other end of the conical sleeve (201), and two groups of slots (300) are opened on the surface of the other end of the mold body (100), and the ends of the limiting plates (301) penetrate into the interior of the slots (300).

7. The mold cavity structure of the extrusion mold according to claim 1, characterized in that: A fixing flange (101) is fixedly provided at the other end of the mold body (100), and a plurality of mounting holes are provided on the fixing flange (101).

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