An extrusion die for profiled sections

Abstract

This utility model discloses a profile extrusion molding die, relating to the field of extrusion molding die technology. It includes a die body, a cavity passage, a shaping strip, an inlet passage, and an outlet groove. The inlet passage, cavity passage, and outlet groove are connected sequentially from left to right. The inlet passage is composed of a shrinking cavity and a guide cavity connected from left to right. It also includes a gradient strip fixed within the guide cavity. The advantages of this utility model are: by pre-shaping the raw material in the shrinking cavity before it enters the guide cavity and contacts the gradient strip for further pre-shaping, the shape change process is relatively smooth. The raw material in the shrinking cavity, through the guide block, smoothly enters and contacts the gradient strip for shaping, resulting in good flow stability. The shrinkage of the raw material in the guide cavity before entering the cavity passage results in a small drop, allowing it to gradually adapt to the final molding shape, reducing stress concentration and thus reducing cracks and defects, and improving the surface quality and precision of the profile.

Description

Technical Field

[0001] This utility model relates to the field of extrusion molding die technology, and more specifically to an extrusion molding die for profiles. Background Technology

[0002] A profile extrusion die is a tool used to extrude metal materials (such as aluminum, copper, etc.) into a specific shape under high pressure, and can produce metal profiles with various cross-sectional shapes (cylindrical, square, etc.).

[0003] As shown in the existing "Application No.: CN201820179851.0, A Solid Bar Mold", the "the vertical edge of the second conical groove and the rectangular groove are set at an angle of 5°". The structure guided by shrinkage can make the structure of the formed profile have good density, and the flow of the guide shape can reduce the wear on the mold.

[0004] However, when using only the above-mentioned shrinkage-guided structure, there are still disadvantages such as stress concentration, which may lead to cracks and lower forming accuracy when producing profiles with concave and convex edges. Utility Model Content

[0005] The purpose of this utility model is to provide a profile extrusion molding die in order to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] This utility model proposes a profile extrusion molding die, including a die body, a cavity passage provided in the die body, a molding strip fixed in the die body, an inlet passage provided at the left end of the die body, and an outlet groove provided at the right end of the die body.

[0008] The inlet passage, the cavity passage, and the outlet groove are connected sequentially from left to right;

[0009] The cavity passage gradually decreases in size from left to right, and the cavity passage is composed of a shrinking cavity and a guide cavity that are connected from left to right.

[0010] It also includes a gradient strip fixed in the guide cavity. The gradient strip gradually decreases in size from left to right. The right end of the gradient strip is the same size and shape as the left end of the shaping strip and they are connected together in a transitional manner. A guide block is fixed at the right end of the gradient strip. The right end of the guide block is the same size as the left end of the gradient strip and they are connected together in a transitional manner. The guide block gradually increases in size from left to right.

[0011] As a preferred embodiment of the present invention, the shrinkage cavity includes a first shrinkage cavity, a first straight cavity, and a second shrinkage cavity connected sequentially from left to right. The first shrinkage cavity and the second shrinkage cavity gradually decrease in size from left to right, and the first straight cavity is the same size from left to right.

[0012] As a preferred embodiment of this utility model, the right end of the first contraction cavity is the same size as the left end of the first straight cavity, and the right end of the first straight cavity is the same size as the left end of the second contraction cavity.

[0013] As a preferred technical solution of this utility model, the guide cavity includes a second straight cavity, a third contraction cavity, a third straight cavity, and a fourth contraction cavity connected sequentially from left to right. The left end of the second straight cavity is connected to the second contraction cavity, and the right end of the fourth contraction cavity is connected to the cavity passage. The second straight cavity and the third straight cavity are the same size from left to right, and the third contraction cavity and the fourth contraction cavity gradually decrease in size from left to right.

[0014] As a preferred embodiment of the present invention, the right end of the second contraction cavity is the same size as the left end of the second straight cavity, the right end of the second straight cavity is the same size as the left end of the third contraction cavity, the right end of the third contraction cavity is the same size as the left end of the third straight cavity, the right end of the third straight cavity is the same size as the left end of the fourth contraction cavity, and the right end of the fourth contraction cavity is the same size as the left end of the cavity passage.

[0015] The beneficial effects of this utility model are as follows:

[0016] By first pre-shaping the raw material in the shrinking cavity, and then entering the guide cavity to contact the gradient strip for further pre-shaping, the shape change process is relatively smooth. In the shrinking cavity, the raw material contacts the gradient strip for smoother shaping through the guide block, resulting in good flow stability. When the raw material shrinks in the guide cavity and then enters the cavity passage, the drop is small, which can gradually adapt to the final molding shape, reduce stress concentration, reduce the generation of cracks and defects, and improve the surface quality and precision of the profile. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 yes Figure 1 Schematic diagram of the AA cross-sectional structure;

[0019] Figure 3 yes Figure 1 A schematic diagram of the BB cross-sectional structure;

[0020] Figure 4 yes Figure 1 Schematic diagram of the CC cross-section structure;

[0021] Figure 5 yes Figure 1 Schematic diagram of the DD cross-sectional structure;

[0022] Figure 6This is a schematic diagram of the cross-sectional structure of the profile of this utility model.

[0023] Reference numerals: Mold body-1, Cavity passage-2, Molding strip-3, Inlet passage-4, Guide strip-5, Outlet groove-6, First shrinkage cavity-41, First straight cavity-42, Second shrinkage cavity-43, Second straight cavity-44, Third shrinkage cavity-45, Third straight cavity-46, Fourth shrinkage cavity-47. Detailed Implementation

[0024] like Figures 1-6 As shown, this utility model proposes: a profile extrusion molding die, including a die body 1, a cavity passage 2 disposed in the die body 1, a molding strip 3 fixed in the die body 1, an inlet passage 4 disposed at the left end of the die body 1, and an outlet groove 6 disposed at the right end of the die body 1.

[0025] The inlet passage 4, the cavity passage 2, and the outlet groove 6 are connected sequentially from left to right; the raw material enters the inlet passage 4, is shaped by the cavity passage 2, and then enters the outlet groove 6;

[0026] The inlet channel 4 gradually decreases in size from left to right. The inlet channel 4 is composed of a shrinking cavity and a guide cavity that are connected from left to right. This allows the raw material to be compressed and flow in the inlet channel 4, which can play a certain guiding role to reduce the resistance and friction of the material when it enters.

[0027] It also includes a gradient strip 5 fixed in the guide cavity; the raw material is first pre-shaped by the shrinking cavity, and then enters the guide cavity to contact the gradient strip 5 for pre-shaping. The shape change process is relatively smooth.

[0028] The gradient strip 5 gradually decreases in size from left to right. The right end of the gradient strip 5 is the same size and shape as the left end of the shaping strip 3 and they are connected in a transitional manner. This corresponds to the shape and structure of the guide cavity, so as to provide a gradual and smooth shrinkage of the incoming raw material. When it enters the cavity channel 2, the drop is small, so as to gradually adapt to the final molding shape. This helps to reduce the stress concentration caused by sudden deformation of the material, thereby reducing the generation of cracks and defects. The gradually decreasing guide can more evenly fill the flowing cavity channel 2 with the material, thereby reducing defects such as voids and bubbles and improving the surface quality and precision of the profile.

[0029] A guide block is fixed at the right end of the gradient strip 5, and the right end of the guide block is the same size as the left end of the gradient strip 5 and they are connected as a whole in a transitional manner. The guide block gradually increases in size from left to right. In this way, the raw material in the shrinkage cavity can enter the contact gradient strip 5 more smoothly through the guide block, and the flow is stable.

[0030] The shrinkage cavity includes a first shrinkage cavity 41, a first straight cavity 42, and a second shrinkage cavity 43 connected sequentially from left to right. The first shrinkage cavity 41 and the second shrinkage cavity 43 gradually decrease in size from left to right, while the first straight cavity 42 is the same size from left to right. The raw material can be gradually shrunk to improve the consistency of the internal structure of the finished product and thus improve its quality. The first straight cavity 42 can transmit constant pressure to the subsequent second shrinkage cavity 43 to improve the uniformity of the flowing material.

[0031] The right end of the first contraction cavity 41 is the same size as the left end of the first straight cavity 42, and the right end of the first straight cavity 42 is the same size as the left end of the second contraction cavity 43; that is, a connection transition of the same size can be made at the connected port position, so that the material flow reduces abrupt changes and reduces the flow resistance of the material.

[0032] The guide cavity includes a second straight cavity 44, a third contraction cavity 45, a third straight cavity 46, and a fourth contraction cavity 47 connected sequentially from left to right. The left end of the second straight cavity 44 is connected to the second contraction cavity 43, and the right end of the fourth contraction cavity 47 is connected to the cavity passage 2. The second straight cavity 44 and the third straight cavity 46 are the same size from left to right, while the third contraction cavity 45 and the fourth contraction cavity 47 gradually decrease in size from left to right. The raw material is then gradually contracted through the third contraction cavity 45 and the fourth contraction cavity 47, which further improves the consistency of the internal structure of the finished product and thus improves its quality. The second straight cavity 44 and the third straight cavity 46 can transmit constant pressure to the subsequent contraction cavities to further improve the uniformity of the flowing material. The cavity passage 4 to the cavity passage 2 has a gradually decreasing stepped contraction structure to greatly reduce the drop and improve the surface quality accuracy of the profile.

[0033] Specifically, the right end of the second contraction cavity 43 is the same size as the left end of the second straight cavity 44, the right end of the second straight cavity 44 is the same size as the left end of the third contraction cavity 45, the right end of the third contraction cavity 45 is the same size as the left end of the third straight cavity 46, the right end of the third straight cavity 46 is the same size as the left end of the fourth contraction cavity 47, and the right end of the fourth contraction cavity 47 is the same size as the left end of the cavity passage 2; thus, a connection transition of the same size can be made at the connected port position, so that the material flow reduces abrupt changes and reduces the flow resistance of the material.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A profile extrusion molding die, comprising a die body (1), a cavity passage (2) disposed within the die body (1), a molding strip (3) fixed within the die body (1), an inlet passage (4) disposed at the left end of the die body (1), and an outlet groove (6) disposed at the right end of the die body (1). The cavity inlet passage (4), the cavity passage (2), and the cavity outlet groove (6) are connected sequentially from left to right; Its features are, The cavity passage (4) gradually decreases in size from left to right, and the cavity passage (4) is composed of a shrinking cavity and a guide cavity that are connected from left to right; It also includes a gradient strip (5) fixed in the guide cavity. The gradient strip (5) gradually decreases from left to right. The right end of the gradient strip (5) has the same shape and size as the left end of the shaping strip (3) and they are connected together in a transitional manner. A guide block is fixed at the right end of the gradient strip (5), and the right end of the guide block has the same size as the left end of the gradient strip (5) and they are connected together in a transitional manner. The guide block gradually increases from left to right.

2. The profile extrusion die according to claim 1, characterized in that, The shrinkage cavity includes a first shrinkage cavity (41), a first straight cavity (42), and a second shrinkage cavity (43) connected sequentially from left to right. The first shrinkage cavity (41) and the second shrinkage cavity (43) gradually decrease in size from left to right, and the first straight cavity (42) is the same size from left to right.

3. The profile extrusion die according to claim 2, characterized in that, The right end of the first contraction cavity (41) is the same size as the left end of the first straight cavity (42), and the right end of the first straight cavity (42) is the same size as the left end of the second contraction cavity (43).

4. The profile extrusion die according to claim 3, characterized in that, The guide cavity includes a second straight cavity (44), a third contraction cavity (45), a third straight cavity (46), and a fourth contraction cavity (47) connected sequentially from left to right. The left end of the second straight cavity (44) is connected to the second contraction cavity (43), and the right end of the fourth contraction cavity (47) is connected to the cavity passage (2). The second straight cavity (44) and the third straight cavity (46) are the same size from left to right, and the third contraction cavity (45) and the fourth contraction cavity (47) gradually decrease in size from left to right.

5. The profile extrusion die according to claim 4, characterized in that, The right end of the second contraction cavity (43) is the same size as the left end of the second straight cavity (44). The right end of the second straight cavity (44) is the same size as the left end of the third contraction cavity (45). The right end of the third contraction cavity (45) is the same size as the left end of the third straight cavity (46). The right end of the third straight cavity (46) is the same size as the left end of the fourth contraction cavity (47). The right end of the fourth contraction cavity (47) is the same size as the left end of the cavity passage (2).

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