Die-casting die side face extrusion device
By designing a side extrusion device for die-casting molds, the problem of poor shrinkage effect of traditional extrusion pins at the peripheral position is solved, and precise shrinkage of shrinkage holes at the wall thickness of the die-casting parts is achieved, which improves the airtightness and internal quality of the castings.
Patent Information
- Application Number
- CN202421495707.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The extrusion pin design of traditional die-casting molds is mostly flat-headed structure, which is difficult to effectively replenish and shrink at the peripheral position, resulting in difficult to solve the problem of shrinkage.
A side extrusion device of die-casting mold is designed, including an extrusion sleeve, an extrusion pin, an oil cylinder connecting rod and an extrusion cylinder. Through the cooperation of the slider and the slider seat, the precise movement of the extrusion pin in the non-vertical direction is realized, and the extrusion and replenishment of liquid aluminum is carried out.
This device can effectively accurately replenish the shrinkage holes at the wall thickness of the die casting, increase the range of replenishment, ensure that the airtightness of the product here meets the predetermined standards, and improve the internal quality of the casting.
Smart Images
Figure CN222754399U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of die casting, in particular to a side extrusion device for a die casting die. Background Art
[0002] The local extrusion technology of die-casting molds has been widely used in the current die-casting industry, especially in the manufacture of die-casting products with strict airtightness requirements. The main principle of this technology is to perform precise secondary pressurization treatment on the local over-thick areas in the mold at the critical stage of die-casting. This operation is usually performed when the material is in a semi-solidified state. Through the carefully designed cylinder in the mold, the extrusion rod is connected and driven to perform ejection action, thereby making the crystal structure of these areas more dense. This method can significantly reduce the shrinkage problem that may be caused by local heat concentration during the transition from liquid phase to solid phase.
[0003] However, it is worth noting that the design of traditional extrusion pins is mostly flat-headed. This design can indeed play an effective role in shrinkage compensation in the vertical direction. However, when facing the peripheral position, its shrinkage compensation effect is greatly reduced, and it is often difficult to achieve the expected effect, making it difficult to fundamentally solve the peripheral shrinkage problem. In order to break through this technical bottleneck, a side extrusion device for the die-casting mold is proposed. Utility Model Content
[0004] The utility model aims to provide a side extrusion device for a die-casting die, which realizes the shrinkage compensation of the non-vertical peripheral range of the casting and the extrusion pin, increases the shrinkage compensation range, and enables the casting to obtain good internal quality through secondary extrusion.
[0005] To achieve the above objectives, the present application proposes a die-casting mold side extrusion device, comprising:
[0006] Extrusion sleeve, inserted into the die casting, used for forming;
[0007] An extrusion pin is placed in the extrusion sleeve with its end close to the thickness of the die casting wall, and is used to extrude the aluminum liquid;
[0008] The connecting rod of the oil cylinder is connected to the extrusion pin, and transmits the thrust to the extrusion pin to make it move toward the die casting;
[0009] The extrusion cylinder is connected to the cylinder connecting rod and is used to provide extrusion force.
[0010] Furthermore, it also includes:
[0011] A slider, one side of which matches the shape of the die casting, and a through hole with a hanging platform for the extrusion sleeve to pass through is provided in the slider;
[0012] The slider seat connects the slider and the oil cylinder connecting rod and plays a role of guiding sliding. The oil cylinder connecting rod and the extrusion pin are connected in the slider seat.
[0013] Furthermore, the extrusion oil cylinder is placed on a push block, and the push block is fixedly connected to a slider seat.
[0014] Furthermore, a U-shaped groove is formed on the push block, a connecting shaft is provided in the U-shaped groove, and the connecting shaft is connected to the slider cylinder through a coupling.
[0015] Furthermore, the slider seat comprises an upper platform and a lower platform, a limiting sleeve is provided on the lower platform, and the oil cylinder connecting rod passes through the limiting sleeve.
[0016] Furthermore, when the slider moves into place, it is locked by a locking plate.
[0017] Furthermore, the height of the push block is the same as the height of the lower platform.
[0018] Furthermore, the extrusion pin is arranged at an eccentric position of the extrusion pin sleeve.
[0019] As a further step, the slider cylinder is installed on the cylinder seat through a cylinder plate.
[0020] As a further step, guide strips are provided on both sides of the slider seat.
[0021] Compared with the prior art, the above technical solution adopted by the utility model has the following advantages: when the motion trajectory of the die casting and the extrusion pin is in a non-vertical state, the device exhibits excellent performance, and it can effectively and accurately compensate the shrinkage holes at the wall thickness of the die casting, thereby ensuring that the air tightness of the product at this location meets the predetermined standard. Through the carefully designed slider cylinder, the device as a whole can accurately move toward the die casting, so that the extrusion sleeve can penetrate into the die casting. When the aluminum liquid is semi-solidified, since the cavity and the extrusion sleeve jointly limit the flow range of the aluminum liquid, the extrusion cylinder drives the extrusion pin to accurately guide the aluminum liquid to the wall thickness of the die casting during the movement, and accurately compensate the shrinkage holes, ultimately achieving a significant improvement in the air tightness of the die casting. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the structure of the side extrusion device of the die-casting mold;
[0023] Figure 2 This is a schematic diagram of the die-casting die side extrusion device before the extrusion action is realized;
[0024] Figure 3 It is a schematic diagram of the die-casting mold side extrusion device after the extrusion action is realized;
[0025] Among them: 1-extrusion sleeve; 2-die casting; 3-extrusion pin; 4-slider; 5-slider seat; 6-locking plate; 7-cylinder connecting rod; 8-guide strip; 9-push block; 10-coupling; 11-cylinder seat; 12-extrusion cylinder; 13-slider cylinder; 14-cylinder plate. DETAILED DESCRIPTION
[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0028] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0030] See also Figure 1 , this embodiment provides a die-casting mold side extrusion device, comprising:
[0031] Extrusion sleeve, inserted into the die casting, used for forming;
[0032] An extrusion pin is placed in the extrusion sleeve with its end close to the thickness of the die casting wall, and is used to extrude the aluminum liquid;
[0033] The connecting rod of the oil cylinder is connected to the extrusion pin, and transmits the thrust to the extrusion pin to make it move toward the die casting;
[0034] The extrusion cylinder is connected to the cylinder connecting rod and is used to provide extrusion force; the extrusion cylinder is placed on the push block; a U-shaped groove is opened on the push block, a connecting shaft is arranged in the U-shaped groove, and the connecting shaft is connected to the slider cylinder through a coupling; the slider cylinder is installed on the cylinder seat through a cylinder plate;
[0035] The slider has one side that matches the shape of the die casting, and a through hole with a hanging platform for the extrusion sleeve to pass through is provided in the slider; when the slider moves into place, it is locked by a locking plate, and the locking plate is installed on the fixed plate of the mold (not shown in the figure);
[0036] The slider seat connects the slider and the cylinder connecting rod, plays a guiding sliding role and is connected to the push block. The cylinder connecting rod and the extrusion pin are connected in the slider seat. Guide strips are provided on both sides of the slider seat to limit the moving direction. The slider seat includes an upper platform and a lower platform. A limit sleeve is provided on the lower platform, and the cylinder connecting rod passes through the limit sleeve.
[0037] In this embodiment, the extrusion pin is arranged at an eccentric position of the extrusion pin sleeve.
[0038] The above device is used as follows: it is determined that a die-casting of a product has a thick wall thickness, which is prone to defects and requires secondary extrusion to ensure the internal quality of the casting; when performing the mold closing action, the slider cylinder drives the extrusion sleeve, extrusion pin, slider, slider seat, cylinder connecting rod, push block, coupling, cylinder seat, and extrusion cylinder to move forward. At this time, the extrusion pin is located at the thicker wall position, and one end of the extrusion sleeve is embedded in the die-casting. Figure 2 As shown; when the aluminum liquid is semi-solidified, the extrusion cylinder drives the extrusion pin to continue to move forward to complete the extrusion action, thereby obtaining a die casting with good internal quality, such as Figure 3 When the mold is opened, the slider cylinder drives the extrusion sleeve, the extrusion pin, the slider, the slider seat, the cylinder connecting rod, the push block, the coupling, the cylinder seat, and the extrusion cylinder to move backward.
[0039] The effect of this embodiment is that it realizes the shrinkage compensation in the non-vertical peripheral range of the die casting and the extrusion pin, increases the shrinkage compensation range, enables the casting to obtain good internal quality through secondary extrusion, overcomes the problem of local shrinkage of complex parts, and improves the yield rate.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A die-casting mold side extrusion device, characterized in that: include: Extrusion sleeve, inserted into the die casting, used for forming; An extrusion pin is placed in the extrusion sleeve with its end close to the thickness of the die casting wall, and is used to extrude the aluminum liquid; The connecting rod of the oil cylinder is connected to the extrusion pin, and transmits the thrust to the extrusion pin to make it move toward the die casting; The extrusion cylinder is connected to the cylinder connecting rod and is used to provide extrusion force.
2. A die-casting mold side extrusion device according to claim 1, characterized in that: Also includes: A slider, one side of which matches the shape of the die casting, and a through hole with a hanging platform for the extrusion sleeve to pass through is provided in the slider; The slider seat connects the slider and the oil cylinder connecting rod and plays a role of guiding sliding. The oil cylinder connecting rod and the extrusion pin are connected in the slider seat.
3. A die-casting mold side extrusion device according to claim 2, characterized in that: The extrusion oil cylinder is placed on a push block, and the push block is fixedly connected to a slide block seat.
4. A die-casting mold side extrusion device according to claim 3, characterized in that: A U-shaped groove is provided on the push block, a connecting shaft is arranged in the U-shaped groove, and the connecting shaft is connected with the slide block oil cylinder through a coupling.
5. The die-casting mold side extrusion device according to claim 3, characterized in that: The slider seat comprises an upper platform and a lower platform. A limiting sleeve is arranged on the lower platform, and the oil cylinder connecting rod passes through the limiting sleeve.
6. A die-casting mold side extrusion device according to claim 5, characterized in that: When the slider moves into position, it is locked by the locking plate.
7. The die-casting mold side extrusion device according to claim 5, characterized in that: The height of the push block is the same as the height of the lower platform.
8. The die-casting mold side extrusion device according to claim 1, characterized in that: The extrusion pin is arranged at an eccentric position of the extrusion pin sleeve.
9. A die-casting mold side extrusion device according to claim 4, characterized in that: The slider oil cylinder is installed on the oil cylinder seat through the oil cylinder plate.
10. The die-casting mold side extrusion device according to claim 2, characterized in that: Guide strips are arranged on both sides of the slider seat.