Die protection structure for an extruder

Abstract

This utility model discloses a mold protection structure for an extruder, comprising a mold body, a mold support, and a mold protection seat. The mold body is mounted on the mold support, and the mold protection seat is located at the outlet of the mold body. The mold protection seat has a material passage for the extruded product to pass through, and the material passage is connected to the outlet of the mold body. A circumferential venting groove is formed on the mold protection seat, and venting holes are formed on the mold protection seat. A venting channel is formed inside the mold protection seat, connecting to the venting holes and the venting groove. Protective gas flows into the venting channel through the venting holes and then into the outlet of the mold body through the venting groove, thus protecting the extruded product. By forming a venting groove, the mold protection structure of the extruder allows the protective gas to form a protective layer on the surface of the extruded product, preventing oxidation due to contact with air and avoiding impact on subsequent processes.

Description

Technical Field

[0001] This utility model belongs to the field of extrusion press technology, and in particular relates to a mold protection structure for an extrusion press. Background Technology

[0002] Extrusion molding is a common forming method for aluminum alloy tubes and rods. Extrusion molding requires an extrusion press for production. Most existing extrusion presses use forward extrusion. In forward extrusion, the extrusion shaft, driven by hydraulic pressure, pushes the cast ingot forward within the extrusion cylinder, forcing it to be extruded from the die to form a tube or rod profile. An extrusion pad is placed between the extrusion shaft and the aluminum cast ingot to prevent aluminum material from overflowing through the gaps. During the extrusion process, the extruded workpiece flows out from the die cavity. Due to the high surface temperature of the extruded product, it oxidizes upon contact with air, affecting subsequent processes. Utility Model Content

[0003] The purpose of this invention is to provide a mold protection structure for an extruder, so as to solve the problem that conventionally extruded products are oxidized when they come into contact with air during extrusion due to their high surface temperature.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A die protection structure for an extruder includes a die body, a die support, and a die protection base, wherein:

[0006] The mold body is detachably mounted on the mold support base. The mold protection base is mounted on the mold support base and located at the outlet of the mold body. The mold protection base has a material passage for the extruded product to pass through. The material passage is connected to the outlet of the mold body. The mold protection base has a circumferentially formed venting ring groove on one side facing the mold body. The venting ring groove is connected to the material passage. The mold protection base has a venting hole. The mold protection base has a venting channel inside. The first end of the venting channel is connected to the venting hole. The second end of the venting channel is connected to the venting ring groove. Protective gas flows into the venting channel through the venting hole and into the outlet of the mold body through the venting ring groove to protect the extruded product.

[0007] Furthermore, the protective gas is nitrogen.

[0008] Furthermore, the mold support base includes a mold base, an extrusion tube mold sleeve, and a mold sleeve. The mold sleeve is detachably installed on the mold base via a disassembly assembly. The mold sleeve has a hollowed-out center. The outer end face of the extrusion tube mold sleeve is installed in the center of the mold sleeve. An installation cavity is provided inside the extrusion tube mold sleeve, and the mold body is installed in the installation cavity.

[0009] Furthermore, the mold support base also includes a mold support pad, which is sleeved between the mold body and the mold protection base. The mold support pad is configured to prevent hard contact between the mold body and the mold protection base.

[0010] Furthermore, the mold protection seat includes a first pad and a second pad, both of which can be detachably installed on the mold base. The first side of the first pad is tightly attached to the mold support seat, and the second side of the first pad is connected to the second pad by a fixing bolt.

[0011] Furthermore, the first pad has a first material passage cavity in the middle, and the second pad has a second material passage cavity in the middle. The first material passage cavity and the second material passage cavity are connected and coaxially arranged. The inner diameter of the first material passage cavity is smaller than the inner diameter of the second material passage cavity. The first material passage cavity and the second material passage cavity together form the material passage channel.

[0012] Furthermore, the assembly / disassembly assembly includes a first bolt and a pressure plate. The outer edge of the mold sleeve extends outward with an installation portion. The pressure plate abuts against the installation portion. The mold base has a first threaded hole. The first bolt is adapted to the first threaded hole. The pressure plate has a through hole. The shank of the first bolt passes through the through hole and is tightened into the first threaded hole. The head of the first bolt abuts against the pressure plate, thereby cooperating with the installation portion to install the mold sleeve.

[0013] Furthermore, the bottom of the mold protection seat is provided with a keyway, and the mold base is provided with an installation key on the side facing the mold protection seat. The installation key is adapted to the keyway, and the installation key is provided with at least one second threaded hole. A second bolt is provided corresponding to the second threaded hole. Each second bolt is tightened into the corresponding second threaded hole to install the installation key on the mold base. The mold protection seat is installed on the mold base through the snap-fit ​​cooperation between the keyway and the installation key.

[0014] Compared with the prior art, the beneficial effects of the die protection structure of the extruder are as follows:

[0015] 1) Through the cooperation of the mold body, mold support base and mold protection base, the mold protection base is provided with an air passage groove and an air passage hole on the side facing the mold body. The protective gas flows into the air passage channel through the air passage hole and flows into the outlet of the mold body through the air passage groove. The protective gas can form a protective layer on the surface of the extruded product to prevent the extruded product from contacting the air and oxidizing, without affecting the subsequent process.

[0016] 2) By setting mold support pads, hard contact between the mold body and the mold protection seat is avoided, further protecting the mold body and preventing damage. Attached Figure Description

[0017] To more clearly illustrate and understand the technical solutions in the embodiments of this utility model, the accompanying drawings used in the background technology and embodiment description of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional schematic diagram of the die protection structure of the extruder provided in this embodiment of the utility model;

[0019] Figure 2 This is a side view of the mold protection seat 30 provided in this embodiment of the utility model. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] To facilitate understanding of this utility model, a more complete description of it will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Please see Figure 1 and Figure 2 As shown, in this embodiment, a die protection structure for an extruder includes a die body 10, a die support 20, and a die protection seat 30. The die body 10 is detachably mounted on the die support 20. The die protection seat 30 is mounted on the die support 20 and located at the outlet of the die body 10. The die protection seat 30 has a material passage 300 for the extruded product to pass through. The material passage 300 is connected to the outlet of the die body 10. The die protection seat 30 has a circumferential edge facing the die body 10. An venting ring groove 301 is provided, which is connected to the material passage 300. An venting hole 302 is provided on the mold protection seat 30, and an venting channel 303 is provided inside the mold protection seat 30. The first end of the venting channel 303 is connected to the venting hole 302, and the second end of the venting channel 303 is connected to the venting ring groove 301. Protective gas flows into the venting channel 303 through the venting hole 302 and flows into the outlet of the mold body 10 through the venting ring groove 301 to protect the extruded product.

[0023] As can be seen, through the cooperation of the mold body 10, the mold support 20 and the mold protection seat 30, the mold protection seat 30 has an air passage groove 301 and an air passage hole 302 circumferentially opened on the side facing the mold body 10. The protective gas flows into the air passage channel 303 through the air passage hole 302 and flows into the outlet of the mold body 10 through the air passage groove 301. The protective gas can form a protective layer on the surface of the extruded product to prevent the extruded product from contacting the air and oxidizing, without affecting the subsequent processes.

[0024] As one implementation method, the protective gas is nitrogen.

[0025] Specifically, nitrogen has low reactivity and can form a protective layer on the surface of the extruded product.

[0026] Of course, as another implementation method, the protective gas can also be other inert gases.

[0027] In one embodiment, the mold support base 20 includes a mold base 21, an extrusion tube mold sleeve 22, and a mold sleeve 23. The mold sleeve 23 is detachably mounted on the mold base 21 via a disassembly assembly 40. The mold sleeve 23 has a hollowed-out center. The outer end face of the extrusion tube mold sleeve 22 is mounted in the center of the mold sleeve 23. An installation cavity is provided inside the extrusion tube mold sleeve 22, and the mold body 10 is installed in the installation cavity.

[0028] Specifically, both the extrusion tube sleeve 22 and the die sleeve 23 are annular components.

[0029] It can be seen that by assembling and cooperating the extrusion tube sleeve 22 and the mold sleeve 23, dual protection of the mold body 10 is achieved, preventing damage to the mold body 10 during the extrusion process.

[0030] In one embodiment, the mold support base 20 also includes a mold support pad 24, which is sleeved between the mold body 10 and the mold protection base 30. The mold support pad 24 is configured to prevent hard contact between the mold body 10 and the mold protection base 30.

[0031] Specifically, the mold support pad 24 is also a ring-shaped component.

[0032] It can be seen that by setting the mold support pad 24, hard contact between the mold body 10 and the mold protection seat 30 is avoided, further protecting the mold body 10 and preventing damage.

[0033] In one embodiment, the mold protection seat 30 includes a first pad 31 and a second pad 32. Both the first pad 31 and the second pad 32 can be detachably installed on the mold base 21. The first side of the first pad 31 is set close to the mold support seat 20, and the second side of the first pad 31 is connected to the second pad 32 by a fixing bolt 33.

[0034] Specifically, both the first pad 31 and the second pad 32 are annular components.

[0035] In one embodiment, a first material passage cavity 300a is provided in the middle of the first pad 31, and a second material passage cavity 300b is provided in the middle of the second pad 32. The first material passage cavity 300a and the second material passage cavity 300b are connected and coaxially arranged. The inner diameter of the first material passage cavity 300a is smaller than the inner diameter of the second material passage cavity 300b. The first material passage cavity 300a and the second material passage cavity 300b together form a material passage channel 300.

[0036] It can be seen that by coaxially connecting the first material passage chamber 300a and the second material passage chamber 300b to form the material passage channel 300, it can be ensured that the material flows in a straight line during the conveying process, thus ensuring the smoothness and stability of the product outflow.

[0037] In one embodiment, the disassembly and assembly assembly 40 includes a first bolt 41 and a pressure plate 42. The outer edge of the mold sleeve 23 extends outward with an installation part 43. The pressure plate 42 abuts against the installation part 43. The mold base 21 has a first threaded hole 44. The first bolt 41 is adapted to the first threaded hole 44. The pressure plate 42 has a through hole 45. The shank of the first bolt 41 passes through the through hole 45 and is tightened into the first threaded hole 44. The head of the first bolt 41 abuts against the pressure plate 42, thereby cooperating with the installation part 43 to install the mold sleeve 23.

[0038] As can be seen, through the cooperation of the first bolt 41 and the pressure plate 42, the shank of the first bolt 41 is passed through the through hole 45 and tightened into the first threaded hole 44, and the head of the first bolt 41 abuts against the pressure plate 42. With the cooperation of the mounting part 43, the mold sleeve 23 is installed, providing a disassembly and assembly component 40 that is simple to install and occupies little space.

[0039] In one embodiment, a keyway 34 is provided at the bottom of the mold protection seat 30, and an installation key 35 is provided on the side of the mold base 21 facing the mold protection seat 30. The installation key 35 is adapted to the keyway 34. At least one second threaded hole 36 is provided on the installation key 35, and a second bolt 37 is provided corresponding to the second threaded hole 36. Each second bolt 37 is tightened in the corresponding second threaded hole 36 to install the installation key 35 on the mold base 21. The mold protection seat 30 is installed on the mold base 21 through the snap-fit ​​cooperation between the keyway 34 and the installation key 35.

[0040] Specifically, there are two second threaded holes 36, and a second bolt 37 is provided at each of the two second threaded holes 36, with the two second threaded holes 36 spaced apart.

[0041] As can be seen, by providing a keyway 34 at the bottom of the mold protection seat 30 and setting an installation key 35 on the side of the mold base 21 facing the mold protection seat 30, the mold protection seat 30 is installed on the mold base 21 through the snap-fit ​​cooperation of the keyway 34 and the installation key 35, resulting in high positioning accuracy and firm installation.

[0042] When the extruded product flows to the outlet of the die body 10, the protective gas of the die protection structure of the extruder flows into the air passage 303 through the air passage 302 and into the outlet of the die body 10 through the air passage ring groove 301. The low-activity nitrogen can form a protective layer on the surface of the extruded product to prevent the extruded high-temperature product from oxidizing upon contact with air, thereby optimizing the effect of water quenching in subsequent equipment.

[0043] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above examples. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A die protection structure for an extruder, characterized in that, The die protection structure of the extruder includes a die body, a die support base, and a die protection base, wherein: The mold body is detachably mounted on the mold support base. The mold protection base is mounted on the mold support base and located at the outlet of the mold body. The mold protection base has a material passage for the extruded product to pass through. The material passage is connected to the outlet of the mold body. The mold protection base has a circumferentially formed venting ring groove on one side facing the mold body. The venting ring groove is connected to the material passage. The mold protection base has a venting hole. The mold protection base has a venting channel inside. The first end of the venting channel is connected to the venting hole. The second end of the venting channel is connected to the venting ring groove. Protective gas flows into the venting channel through the venting hole and into the outlet of the mold body through the venting ring groove to protect the extruded product.

2. The die protection structure for the extruder according to claim 1, characterized in that, The protective gas is nitrogen.

3. The die protection structure for the extruder according to claim 1, characterized in that, The mold support base includes a mold base, an extrusion tube mold sleeve, and a mold sleeve. The mold sleeve is detachably installed on the mold base via a disassembly assembly. The mold sleeve has a hollowed-out center. The outer end face of the extrusion tube mold sleeve is installed in the center of the mold sleeve. An installation cavity is provided inside the extrusion tube mold sleeve, and the mold body is installed in the installation cavity.

4. The die protection structure for the extruder according to claim 3, characterized in that, The mold support base also includes a mold support pad, which is sleeved between the mold body and the mold protection base. The mold support pad is configured to prevent hard contact between the mold body and the mold protection base.

5. The die protection structure for the extruder according to claim 3, characterized in that, The mold protection seat includes a first pad and a second pad, both of which can be detachably installed on the mold base. The first side of the first pad is set close to the mold support seat, and the second side of the first pad is connected to the second pad by a fixing bolt.

6. The die protection structure for the extruder according to claim 5, characterized in that, The first pad has a first material passage cavity in the middle, and the second pad has a second material passage cavity in the middle. The first material passage cavity and the second material passage cavity are connected and coaxially arranged. The inner diameter of the first material passage cavity is smaller than the inner diameter of the second material passage cavity. The first material passage cavity and the second material passage cavity together form the material passage channel.

7. The die protection structure for the extruder according to claim 3, characterized in that, The assembly / disassembly assembly includes a first bolt and a pressure plate. The outer edge of the mold sleeve extends outward with a mounting portion. The pressure plate abuts against the mounting portion. The mold base has a first threaded hole. The first bolt is adapted to the first threaded hole. The pressure plate has a through hole. The shank of the first bolt passes through the through hole and is tightened into the first threaded hole. The head of the first bolt abuts against the pressure plate, thereby cooperating with the mounting portion to install the mold sleeve.

8. The die protection structure for the extruder according to claim 3, characterized in that, The bottom of the mold protection seat is provided with a keyway, and the mold base is provided with an installation key on the side facing the mold protection seat. The installation key is adapted to the keyway, and the installation key is provided with at least one second threaded hole. A second bolt is provided corresponding to the second threaded hole. Each second bolt is tightened into the corresponding second threaded hole to install the installation key on the mold base. The mold protection seat is installed on the mold base through the snap-fit ​​cooperation between the keyway and the installation key.

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