A runner structure of an extrusion die for a clad metal plate

Abstract

The utility model discloses an extrusion die's runner structure of composite metal sheet, including die main part, and die main part includes two half moulds, and the profile cavity of going through left and right is provided on half mould, and half mould surface is arranged with half extrusion runner, and half extrusion runner includes a plurality of transition surface and mixed flow around groove that distribute in turn interval, and half extrusion runner still includes two groups of symmetrical branch runner, and branch runner includes first branch flow and the second branch flow at first branch flow end, and second branch flow end communicates with the most outside mixed flow around groove, and when two half moulds close, half extrusion runner intercombinatorial formation extrusion runner, and mixed flow around groove intercombinatorial formation mixed channel, and the transition surface that directly connects with the profile cavity surrounds and forms the extrusion outlet of strip shape and other transition surface surrounds and forms transition channel. Through this way, make the high polymer composite material of melting change into the surface structure extrusion, and after the mixed diffusion of multiple transition channel and mixed channel before extruding, therefore, the extrusion effect is better more uniform.

Description

Technical Field

[0001] This utility model relates to the field of extrusion molds, and in particular to a flow channel structure for an extrusion mold of composite metal sheets. Background Technology

[0002] Composite metal sheets are products made by bonding polymer composite materials to the surface of metal profiles using an extrusion die. One of the key components in this manufacturing process is the extrusion die. The die for composite metal sheets is an open die, featuring a profile cavity running through both sides. The metal profile moves continuously along the cavity, and an extrusion orifice is located at the top of the cavity. As the metal profile moves, the extrusion orifice continuously extrudes the molten polymer composite material onto the metal profile surface, shaping it according to the dimensions of the profile cavity. Traditional extrusion dies typically have several independent orifice structures. One injection port leads to several independent extrusion orifices through a tree-like structure, resembling a tree diagram. However, this method has two problems: first, during extrusion, the molten material extruded from each orifice inevitably has near and far ends, making it difficult to control the extrusion process uniformly and prone to porosity and shrinkage cavities; second, if there are localized color differences in the molten polymer composite material, the independent operation of each extrusion orifice will result in noticeable color variations on the surface of the composite metal sheet. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a flow channel structure for an extrusion die of composite metal sheets that produces better extrusion results and more uniform extruded molten material.

[0004] The technical solution adopted by this utility model to solve the problem is: a flow channel structure for an extrusion die of composite metal sheet, comprising:

[0005] The mold body includes two mold halves that fit together. Each mold halves have a profile cavity that runs through the left and right sides. At least a portion of the profile cavity is a metal sheet attachment area. Each mold halves have a semi-extrusion channel on their surface. The semi-extrusion channel includes at least two transition surfaces that surround the metal sheet attachment area in sequence. All transition surfaces have the same outline. The height of the transition surface that directly contacts the profile cavity is lower than the surface of the mold half. The height of the transition surface gradually decreases as it moves away from the profile cavity. A mixing flow groove with the same outline as the transition surface is provided between two adjacent transition surfaces and on the outer side of the outermost transition surface. The semi-extrusion channel also includes two sets of branch channels arranged axially symmetrically. Each set of branch channels includes a first branch. At least two second branches that meander in different directions from the first branch are led out from the end of the first branch. The ends of all second branches are connected to the edge of the outermost mixing flow groove. All transition corners of the branch channels are rounded. The transition corners of the transition surfaces and the mixing flow groove are also rounded.

[0006] One of the die halves is provided with a main channel, and the main channel is provided with an extrusion port that connects to the first branch on the die halves;

[0007] When the two half-die are combined into one, the surfaces of the two half-die are completely attached, and the semi-extrusion channels on the two half-die are joined together to form an extrusion channel. The mixing grooves on the two half-die are joined together to form a mixing channel. The transition surfaces on the two half-die that are directly connected to the profile cavity are joined together to form a strip-shaped extrusion port. Other transition surfaces on the two half-die are joined together to form a transition channel.

[0008] As a further improvement to the above technical solution, the shortest distance between the ends of two adjacent second branches is not less than two-thirds of the maximum distance between the ends of two adjacent second branches.

[0009] As a further improvement to the above technical solution, the intersection point of the axis of symmetry of the two sets of branch channels and the outermost mixing trough is point X, and the innermost second branches of the two sets of branch channels that are close to each other are connected to point X.

[0010] As a further improvement to the above technical solution, two second branches meandering towards both sides of the first branch are respectively drawn from both ends of the first branch, and the second branches meandering towards the middle of the first branch are connected to the same point on the edge of the mixing channel.

[0011] As a further improvement to the above technical solution, the first branch includes a transverse section parallel to the upper surface of the profile cavity and a vertical section parallel to the side surface of the profile cavity.

[0012] As a further improvement to the above technical solution, the width and depth of the first branch are greater than those of the second branch.

[0013] As a further improvement to the above technical solution, the number of transition surfaces and mixing channels on the semi-extrusion channel is three sets.

[0014] As a further improvement to the above technical solution, the depth of the mixing groove near the profile cavity is not higher than the depth of the mixing groove far from the profile cavity.

[0015] As a further improvement to the above technical solution, the profile cavity includes an upper cavity and a lower cavity that are interconnected. Each half mold has two sets of semi-extrusion channels arranged vertically. The surface of the half mold is provided with a partition rib flush with the surface of the half mold at the junction of the upper cavity and the lower cavity. The transition surface of each set of semi-extrusion channels and the edge of the mixing groove extend to the edge of the partition rib. The main channel consists of two sets and is connected to the two sets of semi-extrusion channels on the upper and lower parts of the half mold, respectively.

[0016] The beneficial effects of this utility model are as follows: In this solution, the metal sheet attachment area of ​​the profile cavity refers to the area on the surface of the metal profile that needs to be coated with a polymer composite material. When the two half-molds are closed, the semi-extrusion channels on the two half-molds are combined to form an extrusion channel. At this time, the mixing flow grooves on the two half-molds are combined to form a mixing flow channel, and the transition surfaces on the two half-molds are combined to form a transition channel. The thickness of the transition channel gradually decreases along the direction towards the profile cavity, and the thickness of the mixing flow channel is greater than that of the transition channel. At the same time, the transition surfaces on the two half-molds that are directly connected to the profile cavity enclose a strip-shaped extrusion port with the same length as the metal sheet attachment area. Molten polymer composite material flows along the main channel to the extrusion port of two sets of branch channels, thus flowing into the first branch, and then into the second branch, and then into the outermost mixing channel through multiple second branches. At this time, all the molten polymer composite material is merged again in the outermost mixing channel, and then extruded into the inner mixing channel through the smaller transition channel. In this process, the molten polymer composite material is mixed and diffused again. Through several transition channels and mixing channels, the molten polymer composite material undergoes several additional mixing and diffusion processes, and finally reaches the innermost mixing channel. At this time, the molten polymer composite material in the innermost mixing channel has been diffused and mixed very evenly. Finally, it is completely extruded onto the surface of the metal profile through the strip-shaped extrusion port. In the final extrusion process, the distance that the molten composite polymer material moves from the mixing channel to the surface of the metal profile is basically the same, so compared with the existing technology, the uniformity and consistency of the extrusion process are better. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction. Detailed Implementation

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Reference Figures 1 to 2 A flow channel structure for an extrusion die of a composite metal sheet, comprising:

[0025] The mold body includes two mating half-molds 10. Each half-mold 10 has a through-hole profile cavity 11, where at least a portion of the profile cavity 11 is a metal sheet attachment area. Each half-mold 10 has a semi-extrusion channel on its surface, which includes at least two transition surfaces 20 sequentially surrounding the metal sheet attachment area. All transition surfaces 20 have identical contours. The transition surface 20 directly in contact with the profile cavity 11 is lower than the surface of the half-mold 10, and the height of the transition surface 20 gradually decreases as it moves away from the profile cavity 11. The height of adjacent transition surfaces 20 and the outermost transition surface 20 also decrease. The outer side of each of the two sides is provided with a mixing channel 30 with the same outline as the transition surface 20. The semi-extrusion channel also includes two sets of branch channels 40 arranged symmetrically. Each set of branch channels 40 includes a first branch 41. At least two second branches 42 meander in different directions toward the first branch 41 are led out from the end of the first branch 41. The ends of all the second branches 42 are connected to the edge of the outermost mixing channel 30. Preferably, two second branches 42 meander in both directions toward the first branch 41 are led out from both ends of the first branch 41. All transition corners of the branch channels 40 are rounded. The transition corners of the transition surface 20 and the mixing channel 30 are also rounded.

[0026] One of the half-molds 10 is provided with a main channel, and the main channel is provided with an extrusion port connected to the first branch 41 on the half-mold 10;

[0027] When the two half-die 10 are combined into one, the surfaces of the two half-die 10 are completely in contact, and the semi-extrusion channels on the two half-die 10 are joined together to form an extrusion channel. The mixing grooves 30 on the two half-die 10 are joined together to form a mixing channel. The transition surfaces 20 on the two half-die 10 that are directly connected to the profile cavity 11 are surrounded to form a strip-shaped extrusion port. The other transition surfaces 20 on the two half-die 10 are surrounded to form a transition channel.

[0028] In this design, the metal sheet attachment area of ​​the profile cavity 11 refers to the area on the surface of the metal profile that needs to be coated with a polymer composite material. When the two half-molds 10 are closed, the semi-extrusion channels on the two half-molds 10 are joined together to form an extrusion channel. At this time, the mixing flow grooves 30 on the two half-molds 10 are joined together to form a mixing flow channel, and the transition surfaces 20 on the two half-molds 10 are joined together to form a transition channel. The thickness of the transition channel gradually decreases along the direction toward the profile cavity 11, and the thickness of the mixing flow channel is greater than that of the transition channel. At the same time, the transition surfaces 20 on the two half-molds 10 that are directly connected to the profile cavity 11 enclose a strip-shaped extrusion port with the same length as the metal sheet attachment area. The molten polymer composite material flows along the main channel to the extrusion port of the two sets of branch channels 40, thus flowing into the first branch 41. Then, it flows into four second branches 42 at both ends of the first branch 41, resulting in a total of eight second branches 42 flowing into the outermost mixing channel through the two sets of branch channels 40. At this point, all the molten polymer composite material is merged again in the outermost mixing channel, and then extruded into the inner mixing channel through the smaller transition channel. During this process, the molten polymer composite material is mixed, stirred, and diffused again. Through several transition channels and mixing channels, the molten polymer composite material undergoes several additional mixing, stirring, and diffusion processes, finally reaching the innermost mixing channel. At this point, the molten polymer composite material in the innermost mixing channel has been diffused and stirred very evenly. Finally, it is completely extruded onto the surface of the metal profile through the strip-shaped extrusion port. In the final extrusion process, the distance that the molten composite polymer material moves from the mixing channel to the surface of the metal profile is basically the same, thus achieving better uniformity and consistency in the extrusion process compared to existing technologies.

[0029] In this scheme, for the sake of uniformity, it is preferable that the shortest distance between the ends of two adjacent second branches 42 is not less than two-thirds of the maximum distance between the ends of two adjacent second branches 42.

[0030] In this design, considering the fluidity of the molten polymer composite material during the flow process, for optimal extrusion performance, it is preferable that the intersection of the axis of symmetry of the two sets of branch channels 40 and the outermost mixing channel 30 is point X, and the innermost second branches 42 of the two sets of branch channels 40, which are close to each other, are both connected to point X. Furthermore, it is preferable that the second branches 42, which meander towards the center from both ends of the first branch 41, are connected to the same point on the edge of the mixing channel 30.

[0031] In this scheme, since the number of first branches 41 is less than that of second branches 42, it is preferable that the width and depth of the first branches 41 are greater than those of the second branches 42.

[0032] In this scheme, the first branch 41 preferably includes a transverse section 411 parallel to the upper surface of the profile cavity 11 and a vertical section 412 parallel to the side surface of the profile cavity 11.

[0033] Considering the dimensions of conventional metal profiles, it is preferable that the number of transition surfaces 20 and mixing channels 30 on the semi-extrusion flow channel are both three sets. For some larger or more special-sized metal profiles, the number of transition surfaces 20 and mixing channels 30 can be appropriately increased or decreased.

[0034] Further optimization is made, preferably the depth of the mixing groove 30 near the profile cavity 11 is not higher than the depth of the mixing groove 30 far away from the profile cavity 11.

[0035] Considering that there is a special type of composite metal sheet that is a double-sided, different-colored sheet, i.e., composite polymer materials of different colors or proportions are laminated on both sides of the metal profile, in order to facilitate the extrusion operation in one go, the profile cavity 11 preferably includes an upper cavity 111 and a lower cavity 112 that are interconnected. The boundary line between the upper cavity 111 and the lower cavity 112 is the boundary line between the two different composite polymer materials of different colors or proportions. Each half-die 10 has two sets of semi-extrusion channels arranged vertically. At the junction of the upper cavity 111 and the lower cavity 112, the surface of the half-die 10 is provided with a partition rib 50 that is flush with the surface of the half-die 10. The edges of the transition surface 20 and the mixing groove 30 of each set of semi-extrusion channels extend to the edge of the partition rib 50. There are two sets of main channels, which are respectively connected to the two sets of semi-extrusion channels on the upper and lower sides of the half-die 10. In this way, the metal extrusion operation on both sides of the metal profile can be completed in one go.

[0036] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A flow channel structure for an extrusion die of a composite metal sheet, characterized in that, include: The mold body includes two mating half-molds (10), each half-mold (10) having a through-hole profile cavity (11), wherein at least a portion of the profile cavity (11) is a metal sheet attachment area, and each half-mold (10) has a semi-extrusion channel arranged on its surface, wherein the semi-extrusion channel includes at least two transition surfaces (20) sequentially surrounding the outside of the metal sheet attachment area, all transition surfaces (20) having the same outline, wherein the height of the transition surface (20) directly in contact with the profile cavity (11) is lower than the surface of the half-mold (10), and the height of the transition surface (20) gradually decreases as it moves away from the profile cavity (11), and the height of two adjacent transition surfaces (20) decreases as they move away from the profile cavity (11). A mixing channel (30) with the same outline as the transition surface (20) is provided between the transition surfaces (20) and on the outer side of the outermost transition surface (20). The semi-extrusion channel also includes two sets of branch channels (40) arranged symmetrically. Each set of branch channels (40) includes a first branch (41). At least two second branches (42) meandering in different directions toward the first branch (41) are led out from the end of the first branch (41). The ends of all the second branches (42) are connected to the edge of the outermost mixing channel (30). All transition corners of the branch channel (40) are rounded. The transition corners of the transition surface (20) and the mixing channel (30) are rounded. One of the half-die (10) is provided with a main channel, and the main channel is provided with an extrusion port connected to the first branch (41) on the half-die (10); When the two half molds (10) are combined into one, the surfaces of the two half molds (10) are completely attached, and the semi-extrusion channels on the two half molds (10) are joined together to form an extrusion channel. The mixing grooves (30) on the two half molds (10) are joined together to form a mixing channel. The transition surfaces (20) on the two half molds (10) that are directly connected to the profile cavity (11) are enclosed to form a strip-shaped extrusion port. The other transition surfaces (20) on the two half molds (10) are enclosed to form a transition channel.

2. The flow channel structure of the extrusion die for a composite metal sheet as described in claim 1, characterized in that: The shortest distance between the ends of two adjacent second branches (42) is not less than two-thirds of the maximum distance between the ends of two adjacent second branches (42).

3. The flow channel structure of the extrusion die for a composite metal sheet as described in claim 1, characterized in that: The point where the axis of symmetry of the two sets of branch channels (40) intersects with the outermost mixing trough (30) is point X. The innermost second branches (42) of the two sets of branch channels (40) that are close to each other are connected to point X.

4. The flow channel structure of the extrusion die for a composite metal sheet as described in claim 1, characterized in that: Two second branches (42) meander towards both sides of the first branch (41) and both ends of the first branch (41) are connected to the same point on the edge of the mixed flow channel (30) by the second branches (42) meandering towards the middle.

5. The flow channel structure of the extrusion die for a composite metal sheet as described in claim 4, characterized in that: The first branch (41) includes a transverse section (411) parallel to the upper surface of the profile cavity (11) and a vertical section (412) parallel to the side surface of the profile cavity (11).

6. The flow channel structure of the extrusion die for a composite metal sheet as described in claim 1, characterized in that: The width and depth of the first branch (41) are greater than those of the second branch (42).

7. The flow channel structure of the extrusion die for a composite metal sheet as described in claim 1, characterized in that: The number of transition surfaces (20) and mixing channels (30) on the semi-extrusion channel is three sets each.

8. The flow channel structure of the extrusion die for a composite metal sheet as described in claim 1, characterized in that: The depth of the mixing groove (30) near the profile cavity (11) is not higher than the depth of the mixing groove (30) far from the profile cavity (11).

9. The flow channel structure of an extrusion die for a composite metal sheet as described in claim 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that: The profile cavity (11) includes an upper cavity (111) and a lower cavity (112) that are interconnected. Each half mold (10) has two sets of semi-extrusion channels arranged vertically. At the junction of the upper cavity (111) and the lower cavity (112), the surface of the half mold (10) is provided with a partition rib (50) that is flush with the surface of the half mold (10). The edges of the transition surface (20) and the mixing groove (30) of each set of semi-extrusion channels extend to the edge of the partition rib (50). The main channel consists of two sets and is connected to the two sets of semi-extrusion channels on the upper and lower sides of the half mold (10).

Images