Suspension arm type mold

Abstract

The utility model discloses a lazy arm type die which comprises a male die and a female die which are matched and butted, and an outer side cavity extending outwards is formed in the edge of the section shape of a section produced by the lazy arm type die; the convex die is provided with a through shunting hole and a convex die core on the discharging side, and the die core comprises an outer side die core corresponding to the outer side cavity; the outer side die core is connected with the male die through a suspension arm structure on the inward side, the outer side die core is located in the flow dividing hole, and the outward side of the outer side die core and the flow dividing hole are suspended. According to the lazy arm type mold, the mold core is arranged through the lazy arm structure, the outer side of the mold core is suspended, and no shunting bridge is arranged, so that the flow speed of the outer side mold core is increased, the stress of the mold is balanced, and the lazy arm type mold is particularly suitable for the conditions that the span of a profile is large and the end part is provided with a small cavity; and the forming quality and the yield of the profile can be effectively improved, and the service life of the mold can be effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminum profile extrusion dies, in particular to a suspension arm type die. Background Art

[0002] For profiles with cavities, the extrusion die has a corresponding core on the punch. To ensure the stability of the core, the core is usually located under the diversion bridge. In other words, the core is not suspended but connected to the die body through at least two sections on both sides. There is a type of profile with a large span, which exceeds the feeding range of the rod diameter and has a cavity at the end, such as Figure 3 As shown, according to the traditional mold design method, Figure 4 、 Figure 5 As shown, the right side of the two small mold cores (commonly known as "little tongues" in the industry) are connected to the inner wall of the diversion hole via a diversion bridge. This traditional method of bridging results in slow flow in the small tongues, hindering proper molding of this cavity. Furthermore, since the left side lacks a bridge and its shape is simpler than the right, the mold undergoes irreversible elastic deformation during extrusion. This uneven force on the mold causes the large tongue in the center to deflect, which in turn causes plastic deformation at the bridges, ultimately leading to cracking and mold damage. Therefore, an improved mold solution is needed for this situation. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a cantilever-type mold to solve the problem that the core bridging structure of the existing mold affects the production of profiles, and to realize the use of a cantilever structure to connect the core, thereby increasing the flow rate of the core at the edge, balancing the force on the mold, and thereby effectively improving the molding quality of this type of profile and the service life of the mold.

[0004] According to the technical solution of the utility model, the utility model provides a cantilever-type mold, including a matching male mold and a female mold, and the cross-sectional shape of the profile produced by the mold has an outer cavity extending outward at the edge; the male mold has a through diversion hole and a protruding mold core on the discharge side, and the mold core includes an outer mold core corresponding to the outer cavity; the outer mold core is connected to the male mold through a cantilever structure toward the inside, and the position of the outer mold core is located in the diversion hole, and the outer side of the outer mold core is suspended between the diversion hole and the outer side.

[0005] Furthermore, the length dimension of the cross-sectional shape of the produced profile is greater than the diameter of the raw material bar corresponding to the die.

[0006] Furthermore, in the direction from feeding to discharging, the shape of the arm structure of the outer mold core is to first bulge outward and expand, and then retract inward.

[0007] Furthermore, the feeding side of the boom structure is located inside the punch.

[0008] Furthermore, the cross-sectional shape of the produced profile also has a central cavity, the size of the outer cavity is smaller than the central cavity, and the outer cavity is located on one side outside the central cavity; the mold core includes a central mold core corresponding to the central cavity, and the outer mold core is connected to the outside of the central mold core through a suspension arm structure.

[0009] Furthermore, in the cross-sectional shape of the produced profile, there are two outer cavities distributed side by side in the width direction, and there are also two corresponding outer mold cores, and the boom structures of the two outer mold cores are connected by an intermediate bridge.

[0010] Furthermore, on the discharge side of the punch, the middle bridge does not exceed the end surface of the punch other than the core.

[0011] Furthermore, the female mold has a mold hole, and the mold core is inserted into the mold hole. The outline of the mold hole and the outline of the mold core at the mold hole together constitute the cross-sectional shape of the produced profile.

[0012] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0013] In the boom-type mold of the utility model, the mold core is set by the boom structure, the outer side of the mold core is suspended and no diversion bridge is set, thereby improving the flow rate at the outer mold core and balancing the force on the mold. It is particularly suitable for situations where the profile has a large span and a small cavity at the end position, and can effectively improve the molding quality, yield rate and service life of this type of profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a perspective structural diagram of the mold provided by the utility model.

[0015] Figure 2 It is a schematic cross-sectional structural diagram of the male mold in the mold provided by the utility model.

[0016] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional shape structure of the profile produced by the mold shown.

[0017] Figure 4 This is a perspective structural diagram of the outer mold core of a mold designed using traditional mold design methods.

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the outer mold core of a mold designed using traditional mold design methods.

[0019] Description of reference numerals in the accompanying drawings:

[0020] 1. Punch; 2. Outer cavity; 3. Diverter hole; 4. Outer core; 5. Arm structure; 6. Middle cavity; 7. Middle core; 8. Middle bridge. DETAILED DESCRIPTION

[0021] The utility model provides a cantilever mold, which solves the problem that the core bridge structure of the existing mold affects the production of profiles. The mold core is connected by a cantilever structure, thereby increasing the flow rate of the mold core at the edge and balancing the force on the mold, thereby effectively improving the molding quality of this type of profile and the service life of the mold.

[0022] See also Figures 1 to 3 The utility model provides a cantilevered mold, which is a diversion combination mold, including a matching butt-jointed punch 1 and a die. The situation targeted by this solution is that the cross-sectional shape of the produced profile has an outer cavity 2 extending outward at the edge. The punch 1 has a through diversion hole 3 and a protruding mold core on the discharge side, and the mold core includes an outer mold core 4 corresponding to the outer cavity 2. The die has a mold hole, and the mold core is inserted into the mold hole. The contour of the mold hole and the contour of the mold core at the mold hole together constitute the cross-sectional shape of the produced profile; the other specific structures of the extrusion mold are not the focus of improvement of this solution, and will not be elaborated here. The focus of the improvement of this solution is that the outer mold core 4 is connected to the punch 1 on the inner side through the cantilevered structure 5, and the position of the outer mold core 4 is located in the diversion hole 3, and the outer side of the outer mold core 4 is suspended between the diversion hole 3 and the outer side.

[0023] Please also see Figure 1 、 Figure 4 ,as well as Figure 2 、 Figure 5 According to the traditional mold design method, the outside of the outer core 4 is also connected to the inner wall of the diverter hole through a diverter bridge; or in the molds of some other profiles, there are three or four diverter bridges distributed on the outer circumference of the core; and in this solution, only one bridge located on the inner side is connected, that is, the boom structure 5. The traditional method is to provide multiple diverter bridges to stabilize the core, but for such a small core located at the edge, the outer bridge will cause the flow rate at the outer core to be slow, which is not conducive to the normal molding of the outer cavity 2 of the profile; and because there is a diverter bridge on the outside, the resistance is greater than that of the structure on the inside of the outer core. During the extrusion process, the mold is unevenly stressed and the core is prone to deflection, which leads to unsatisfactory wall thickness of the produced profile, as well as deformation and damage of the mold. In view of this structural situation, this solution removes the outer diversion bridge and forms a cantilever structure, which solves the above-mentioned problem. Moreover, since the outer mold core 4 is located at the edge, the resistance is reduced and the uniformity of the force is improved. Therefore, the cantilever structure 5 with a certain thickness can ensure sufficient structural strength and ensure that the outer mold core 4 will not be significantly deformed during extrusion.

[0024] This solution is particularly suitable for situations where the length of the cross-sectional shape of the produced profile is larger than the diameter of the raw material bar corresponding to the mold, in other words, the span of the profile is larger than the diameter of the raw material bar, such as Figure 1 As shown, the left side of the die hole exceeds the feeding range of the raw aluminum rod shown by the dot-dash circle, and the right side of the module corresponding to the outer cavity 2 is also close to the edge of the feeding range.

[0025] More specifically, Figure 2 As shown, in the direction from feed to discharge, the shape of the boom structure 5 of the outer mold core 4 is that it first bulges outward and expands, and then converges inward. On the feed side, the connection between the boom-type mold core and the diversion hole 3 and other structures of the punch 1 has a transition slope or curved surface, which helps to reduce resistance. Furthermore, the feed side of the boom structure 5 is located inside the punch 1, in other words, it is lower than the feed side end face of the punch 1, which is more beneficial to reducing resistance and reducing deformation of the outer mold core 4. On the discharge side, the position of the end of the side mold core 4 below the boom structure 5 is converged inward again. In other words, the boom structure 5 has a section of outward protrusion on the outside. The specific size of this part can be adjusted during design to adjust the flow rate and stress conditions.

[0026] See also Figure 3 The cross-sectional shape of the profile produced in this exemplary embodiment also includes a central cavity 6. The central cavity 6 is generally elongated, such as a rectangle or a long trapezoid. The central cavity 6 is relatively large and located in the middle of the profile. The outer cavity 2 is smaller than the central cavity 6 and is also generally elongated, such as a rectangle or a long trapezoid. The outer cavity 2 is located to one side outside the central cavity 6. A long cantilever structure is also provided at the other end of the lengthwise direction of the central cavity 6, resulting in a larger span of the profile. The core of the punch 1 also includes a central core 7 corresponding to the central cavity 6. The outer core 4 is connected to the outside of the central core 7 via a cantilever structure 5.

[0027] Furthermore, the cross-sectional shape of the produced profile includes two outer cavities 2 arranged side by side in the width direction, with the space between the two outer cavities 2 being empty, in other words, forming a U-shaped groove; the outer mold cores 4 are also two corresponding ones. For this structure with two or more outer mold cores 4, it is preferred that the boom structures 5 of the two outer mold cores 4 be connected by an intermediate bridge 8 to further increase the structural strength and prevent the outer mold cores 4 from swinging and deforming. More preferably, on the discharge side of the punch 1, the intermediate bridge 8 does not extend beyond the end surface of the portion of the punch 1 outside the mold core (i.e., the outer surface of the punch 1 that contacts the die). In the direction from feeding to discharging, the intermediate bridge 8 is positioned with sufficient spacing from the outer mold core 4 to prevent the intermediate bridge 8 from hindering the flow rate of the aluminum material.

[0028] To sum up, in the boom-type mold of the present invention, the mold core is set by the boom structure, the outer side of the mold core is suspended and no diversion bridge is set, thereby improving the flow rate at the outer mold core and balancing the force on the mold. It is particularly suitable for situations where the profile has a large span and a small cavity at the end position, and can effectively improve the molding quality, yield rate and service life of this type of profile.

Claims

1. A cantilever type mold, comprising a matching male mold (1) and a female mold, characterized in that: The cross-sectional shape of the profile produced thereby has an outer cavity (2) extending outward at the edge; the punch (1) has a through diversion hole (3) and a protruding mold core on the discharge side, the mold core including an outer mold core (4) corresponding to the outer cavity (2); the outer mold core (4) is connected to the punch (1) through a suspension arm structure (5) on the inner side, the outer mold core (4) is located in the diversion hole (3), and the outer side of the outer mold core (4) is suspended between the diversion hole (3).

2. The boom type mold according to claim 1, characterized in that: The length dimension of the cross-sectional shape of the produced profile is larger than the diameter of the raw material bar corresponding to the die.

3. The boom type mold according to claim 1, characterized in that: In the direction from feeding to discharging, the shape of the arm structure (5) of the outer mold core (4) is to first bulge outward and then contract inward.

4. The cantilever mold according to claim 3, characterized in that: The feeding side of the boom structure (5) is located inside the punch (1).

5. The cantilever type mold according to any one of claims 1 to 4, characterized in that: The cross-sectional shape of the produced profile further comprises a central cavity (6), the outer cavity (2) is smaller than the central cavity (6), and the outer cavity (2) is located on a side outside the central cavity (6); the mold core comprises a central mold core (7) corresponding to the central cavity (6), and the outer mold core (4) is connected to the outer side of the central mold core (7) via a suspension arm structure (5).

6. The cantilever type mold according to claim 5, characterized in that: In the cross-sectional shape of the produced profile, there are two outer cavities (2) distributed side by side in the width direction, there are also two corresponding outer mold cores (4), and the boom structures (5) of the two outer mold cores (4) are connected by an intermediate bridge (8).

7. The cantilever type mold according to claim 6, characterized in that: On the discharge side of the punch (1), the intermediate bridge (8) does not exceed the end surface of the portion outside the core of the punch (1).

8. The cantilever type mold according to any one of claims 1 to 4, characterized in that: The die has a die hole, and the die core is inserted into the die hole. The outline of the die hole and the outline of the die core at the die hole together constitute the cross-sectional shape of the produced profile.

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