A cold extrusion filter cavity mold

Abstract

The utility model relates to the technical field of cold extrusion dies, and specifically to a cold extrusion filter cavity die, a fixed die, and a movable die which is arranged above the fixed die and can move toward the fixed die to extrude a blank, and is characterized in that it also includes a pad, a through slot for the fixed die to pass through is opened in the middle of the pad, a ring wall is extended downward around the through slot on the lower surface of the pad to form a cavity for the blank to flow and form, a base is fixedly connected below the fixed die, a guide hole is opened through the surface of the base, a guide rod is fixedly connected to the lower surface of the pad, the guide rod is slidably connected to the guide hole, and the guide rod extends to the bottom of the base and is fixedly connected to a bottom plate, a spring is sleeved on the guide rod, and the upper and lower ends of the spring are respectively fixedly connected to the pad and the base; the blank is extruded and enters the cavity to realize rapid extrusion forming; when the movable die is pressed to the surface of the blank, the guide convex ridge guides the flow of the blank to form a part with better quality.

Description

Technical Field

[0001] The utility model relates to the technical field of cold extrusion dies, in particular to a cold extrusion filter cavity die. Background Art

[0002] Cold extrusion is a metal plastic processing method, which applies high pressure to the metal blank at room temperature, so that it undergoes plastic deformation through the mold cavity, and then forms parts of the desired shape and size. Aluminum alloy and other billets with good plasticity are processed into billets of suitable shape, which are placed in the cavity formed by the movable die (concave die) and the fixed die (convex die). Under the action of the press, continuous non-uniform deformation occurs along the contour of the mold, gradually filling all the details of the mold, thereby forming the geometric features of the part, such as holes, grooves, and ribs. There are certain problems with the existing cold extrusion mold. When the billet is extruded, a large amount of billet quickly enters the cavity, causing uneven and continuous flow of billet everywhere. At the same time, due to the excessively fast flow speed, the air in the cavity cannot be discharged slowly, causing bubbles to form in the molded parts, low quality of the finished product, and prone to defects. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] The utility model aims to provide a cold extrusion filter cavity die, which can guide the pressed blanks to quickly form finished parts with higher quality.

[0005] 2. Technical Solution

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model proposes a cold extrusion filter cavity mold, which comprises a fixed mold, a movable mold which is arranged above the fixed mold and can move toward the fixed mold to extrude a blank, and a pad, a through groove for the fixed mold to pass through is opened in the middle of the pad, a ring wall is extended downward around the through groove on the lower surface of the pad to form a cavity for the blank to flow and form between the ring wall and the fixed mold, a base is fixedly connected below the fixed mold, a guide hole is opened through the surface of the base, a guide rod is fixedly connected to the lower surface of the pad, the guide rod is slidably connected to the guide hole, and the guide rod extends to the bottom of the base and is fixedly connected to the bottom plate, a spring is sleeved on the guide rod, and the upper and lower ends of the spring are respectively fixedly connected to the pad and the base.

[0008] Furthermore, the fixed mold surface is provided with guide ridges at the edge close to the mold cavity, and the blank can be squeezed and flow into the mold cavity from the gaps between the guide ridges.

[0009] Furthermore, the guide ridge is broken near the fixed mold corner to form a reinforced corner.

[0010] Furthermore, a guide groove is provided from the fixed mold surface near the edge of the cavity downwardly through the base, a guide column is fixedly connected below the guide ridge, the guide column is slidably connected to the guide groove, and the lower end of the guide column is also fixedly connected to the bottom plate and can move with the bottom plate.

[0011] Furthermore, the upper surface of the pad is slightly higher than the upper edge of the guide ridge.

[0012] 3. Beneficial Effects

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model extrude the movable die on the surface of the blank, and the blank is extruded into the cavity to realize rapid extrusion molding; when the movable die presses to the surface of the blank, the guide ridges guide the flow of the blank and block the blank from directly and rapidly entering the cavity in large quantities from the edge of the fixed die, so that the flow of the blank is more continuous and uneven flow of the blank is prevented. At the same time, the air in the cavity can be slowly emptied, the generation of cavitation in the molded parts is reduced, and the quality of extrusion molding is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the connection between the fixed die and the pad;

[0017] Figure 3 It is a schematic diagram of the connection structure of the pad, the guide ridge and the bottom plate;

[0018] Figure 4 yes Figure 2 A partial enlarged view of part A;

[0019] Figure 5 yes Figure 2 A top view of

[0020] 1. Fixed mold; 2. Moving mold; 3. Backing plate; 4. Through groove; 5. Annular wall; 6. Cavity; 7. Base; 8. Guide hole; 9. Guide rod; 10. Bottom plate; 11. Spring; 12. Guide ridge; 13. Guide groove; 14. Guide column. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] A cold extrusion filter cavity mold, please refer to Figure 1 , including a fixed die 1 and a movable die 2, the movable die 2 is arranged above the fixed die 1, the blank is placed on the surface of the fixed die 1, and the movable die 2 is driven by a press to move toward the fixed die 1, thereby extruding the blank to form it.

[0023] See also Figure 2-5 , and also includes a backing plate 3, in the middle of which a through slot 4 is opened, through which the fixed die 1 can pass, and on the lower surface of the backing plate 3, an annular wall 5 is extended downward around the through slot 4 to form. When the backing plate 3 is almost flush with the upper surface of the fixed die 1, the annular wall 5 surrounds the fixed die 1, and a cavity 6 is formed between the annular wall 5 and the fixed die 1. At this time, the movable die 2 is extruded on the surface of the blank, and the blank is extruded into the cavity 6 to be extruded and formed. The shape of the cavity 6 determines the structure of the part after extrusion.

[0024] A base 7 is fixedly connected below the fixed mold 1, and a guide hole 8 is formed through the surface of the base 7. A guide rod 9 is fixedly connected to the lower surface of the pad 3. The guide rod 9 is slidably connected to the guide hole 8, and the guide rod 9 extends to the lower side of the base 7 and is fixedly connected to the bottom plate 10. A spring 11 is sleeved on the guide rod 9, and the upper and lower ends of the spring 11 are respectively fixedly connected to the pad 3 and the base 7. When the movable mold 2 moves toward the fixed mold 1, the movable mold 2 pushes the pad 3, and the pad 3 drives the guide rod 9 to move downward, and the spring 11 extends. When the pad 3 moves to be flush with the blank on the upper surface of the fixed mold 1, the annular wall 5 just surrounds the outer side of the fixed mold 1, and the movable mold 2 continues to move and presses the blank into the cavity 6 to form the part. When the movable mold 2 retracts under the drive of the press, the spring 11 drives the pad 3 to return to its original position.

[0025] In this embodiment, a guide rib 12 is provided on the surface of the fixed mold 1 near the edge of the cavity 6, and the upper surface of the pad 3 is slightly higher than the upper edge of the guide rib 12, and the height thereof is set to the thickness of the part after molding.

[0026] Specifically, a guide groove 13 is provided from the edge of the surface of the fixed mold 1 near the cavity 6 and passes downward through the base 7. A guide column 14 is fixedly connected below the guide rib 12. The guide column 14 is slidably connected to the guide groove 13. The lower end of the guide column 14 is also fixedly connected to the bottom plate 10 and can move with the bottom plate 10. When the movable mold 2 is pressed on the surface of the pad 3, the pad 3 drives the bottom plate 10, the guide column 14 and the guide rib 12 to move downward synchronously, so that the pad 3 and the guide rib 12 move synchronously, and the guide column 14 slides in the guide groove 13 to play a guiding role.

[0027] When the movable mold 2 is pressed to the surface of the blank, the guide ribs 12 prevent the blank from directly and quickly entering the cavity 6 from the edge of the fixed mold 1, making the flow of the blank more continuous and preventing uneven flow of the blank. At the same time, the air in the cavity 6 can be slowly emptied, reducing the generation of cavitation in the molded parts and improving the quality of extrusion molding. After extrusion molding, the spring 11 drives the bottom plate 7 and the guide ribs 12 to move upward, and the guide ribs 12 can be pressed against the inner wall of the molded part. Since the guide ribs 12 are distributed in large numbers at various places above the fixed mold 12, the top force applied to the molded parts is relatively uniform, making the finished product less likely to deform after demolding.

[0028] In addition, the guide rib 12 is disconnected near the corner of the fixed mold 1. At the disconnection point, the flow flux of the blank is large and the flowability is strong, so that more and faster blanks can flow into the corner, thereby forming a reinforced corner structure.

[0029] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. A cold extrusion filter cavity mold, a fixed mold, and a movable mold arranged above the fixed mold and capable of moving toward the fixed mold to extrude a blank, characterized in that: The cam is provided with a spring which is arranged on the bottom surface of the base and the guide hole is provided on the bottom surface of the base. The spring is provided with a spring which is arranged on the bottom surface of the base. The spring has two ends which are fixed to the cam and the guide hole. The cam is provided with a spring which is arranged on the bottom surface of the base. The spring has two ends which are fixed to the cam and the guide hole is provided on the bottom surface of the base. The spring has two ends which are fixed to the cam and the guide hole is provided on the bottom surface of the base. The spring has two ends which are fixed to the cam and the guide hole is provided on the bottom surface of the base.

2. A cold extrusion filter cavity mold according to claim 1, characterized in that: The fixed mold surface is provided with a flow guiding ridge at the edge close to the mold cavity.

3. A cold extrusion filter cavity mold according to claim 2, characterized in that: The guide rib is broken near the fixed mold corner to form a reinforced corner.

4. A cold extrusion filter cavity mold according to claim 2 or 3, characterized in that: A guide groove is provided downwardly through the base from the edge of the fixed mold surface close to the cavity, a guide column is fixedly connected below the guide ridge, the guide column is slidably connected to the guide groove, and the lower end of the guide column is also fixedly connected to the bottom plate and can move with the bottom plate.

5. The cold extrusion filter cavity mold according to claim 4, characterized in that: The upper surface of the pad is slightly higher than the upper edge of the guide ridge.

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