Extrusion device for die-casting die
By setting a telescopic power mechanism connecting the steering part and the extrusion pin on the outside of the die-casting mold, the problems of insufficient ejection force and high-temperature failure in the die-casting mold are solved, higher ejection force and mold strength are achieved, and the failure rate and cost are reduced.
Patent Information
- Application Number
- CN202422628515.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Existing die-casting molds cannot be equipped with extrusion cylinders with larger diameters, resulting in insufficient ejection force and frequent failures caused by high temperatures, affecting production efficiency and mold strength.
A telescopic power mechanism connected to a steering part and an extrusion pin is set on the outside of the fixed mold frame. The left and right forces of the telescopic power mechanism are converted into up and down forces through the steering part to push the extrusion pin up and down, avoiding installation inside the fixed mold frame. Ordinary telescopic cylinders are used instead of small-bore cylinders.
It achieves greater ejection force, avoids inadequate extrusion, improves mold strength and equipment reliability, reduces failure rate, and saves costs.
Smart Images
Figure CN223418314U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an extrusion device for a die-casting mold, in particular to the structure of the extrusion device for the die-casting mold. Background Art
[0002] When using the die-casting process to produce die-cast parts, due to the diverse structures of die-cast products, some die-cast parts have thicker walls and numerous internal channels, which can easily lead to casting defects such as shrinkage cavities and porosity. To address this problem, existing methods typically incorporate auxiliary structures such as extrusion pins into the die-casting mold. These pins are then locally extruded in thicker areas of the die-casting to eliminate internal shrinkage cavities and porosity. Specifically, a groove is cut within the fixed die frame of the die-casting mold to house an extrusion cylinder. The extrusion cylinder drives the extrusion pins, thereby extruding potential defective areas. This extrusion increases the density of the locally thicker areas and reduces shrinkage cavities.
[0003] Although this method is feasible, due to the small thickness of the fixed mold frame, the size of the extrusion cylinder is limited due to installation space issues, and only an extrusion cylinder with a smaller cylinder diameter can be used, resulting in insufficient ejection force and failure to eject in place, which will affect the actual effect.
[0004] Moreover, in order to place the extrusion cylinder, a large space was dug out in the fixed mold frame, which not only affected the structural strength of the die-casting mold, but also because the extrusion cylinder was installed inside the mold frame, the temperature was too high, causing the extrusion cylinder to malfunction frequently (such as seal failure), resulting in a significant reduction in service life. Maintenance was time-consuming and labor-intensive, affecting production efficiency.
[0005] The purpose of the utility model is to solve the problems that, during the production of die castings, an extrusion oil cylinder with a larger diameter cannot be installed, resulting in insufficient ejection force, and high temperature leads to easy failure. Utility Model Content
[0006] In order to solve the above problems, the utility model provides an extrusion device for a die-casting mold. The die-casting mold 4 includes a fixed mold core 41 and a fixed mold frame 42 fitted on the outside of the fixed mold core 41. The extrusion device includes an extrusion pin 1, a steering device 2 and a telescopic power mechanism. The fixed mold core 41 and the fixed mold frame 42 are provided with an extrusion hole 43 that matches the extrusion pin 1. The extrusion pin 1 is slidably arranged in the extrusion hole 43, with one end located on the outside of the fixed mold frame 42 and the other end located inside the fixed mold. The steering device 2 includes a steering member 21, which is slidably arranged on the outside of the fixed mold frame 42 and is slidably connected to the extrusion pin 1, and is used to drive the extrusion pin 1 to slide back and forth along the extrusion hole 43 during reciprocating motion. The telescopic power mechanism is fixedly arranged on the fixed mold frame 42. The telescopic power mechanism has a telescopic mechanism, which is connected to the steering member 21 to drive the steering member 21 to slide back and forth.
[0007] When the utility model is used, when the telescopic power mechanism pushes the steering member 21 to slide to the right, the force toward the right is converted into a force driving the extrusion pin 1 to move in a vertical upward direction through the steering member 21, so that the extrusion pin 1 slides upward; when the telescopic power mechanism pushes the steering member 21 to slide to the left, the force toward the left is converted into a force driving the extrusion pin 1 to move in a vertical downward direction through the steering member 21, so that the extrusion pin 1 slides downward, thereby achieving the purpose of extruding the thick and large parts of the die-cast product.
[0008] The present invention provides a steering member 21, which is slidably disposed outside the fixed die frame 42. The telescopic power mechanism is connected to the extrusion pin 1 and fixedly mounted on the fixed die frame 42. The steering member 21 converts the left-right force of the telescopic power mechanism into a vertical force, thereby pushing the extrusion pin 1 up and down. The present invention eliminates the need to install the telescopic power mechanism inside the fixed die frame 42, removing the restriction on cylinder diameter. This allows the extrusion cylinder to be replaced with a conventional telescopic power mechanism during mold manufacturing, ensuring ejection force and preventing underextrusion. This improves the strength of the die-casting mold, saves costs, and reduces equipment failure rates.
[0009] Preferably, the steering member 21 includes an inclined steering rod 211 and sliders 212 respectively arranged at both ends of the steering rod 211. The steering rod 211 is inclined along the sliding direction of the steering member 21. A slide groove 11 corresponding to the steering rod 211 is provided on the extrusion pin 1. The slide groove 11 has the same inclination angle as the steering rod 211. The steering rod 211 is inserted into the slide groove 11 and is slidably connected to the extrusion pin 1.
[0010] The steering rod 211 is arranged to be inclined along the sliding direction of the steering member 21, and a slide groove 11 is provided on the extrusion pin 1, so that the extrusion pin 1 is slidably connected to the steering rod 211 through the slide groove 11. Through the mutual cooperation between the steering rod 211 and the extrusion pin 1, when the steering member 21 slides to the right, the force to the right is converted into a force that drives the extrusion pin 1 to move in a vertical upward direction, so that the extrusion pin 1 slides upward. When the steering member 21 slides to the left, the force to the left is converted into a force that drives the extrusion pin 1 to move in a vertical downward direction, so that the extrusion pin 1 slides downward, thereby achieving the purpose of extruding the thick and large parts of the die-casting product.
[0011] Preferably, the steering device 2 further includes a guide plate 22, which is fixedly mounted on the fixed die frame 42 via a mounting plate 23. The guide plate 22 is located outside the steering member 21 and parallel to the fixed die frame 42, with a sliding space 223 formed in the middle for the guide block to slide. A clearance hole 221 is provided on the guide plate 22 at a position corresponding to the extrusion pin 1, and the steering member 21 slides in the sliding space 223. By providing the guide plate 22, the steering member 21 can be positioned, preventing the steering member 21 from tilting due to force, thereby better promoting the movement of the extrusion pin 1.
[0012] Preferably, the guide plate 22 is provided with a guide groove 222 corresponding to the slider 212. The guide groove 222 extends along the sliding direction of the steering member 21, and the slider 212 is slidably disposed in the guide groove 222. By providing the guide groove 222 on the guide plate 22, the slider 212 is slidably disposed in the guide groove 222. The guide groove 222 can be used to position the sliding direction of the steering member 21, thereby preventing the steering member 21 from being tilted due to force, thereby preventing the extrusion pin 1 from being unable to move.
[0013] Preferably, two steering members 21 are provided, and the two steering members 21 are respectively provided on both sides of the extrusion pin 1. Providing steering members 21 on both sides of the extrusion pin 1 can balance the force on the extrusion pin 1 and prevent the extrusion pin 1 from tilting due to uneven force and causing sliding difficulty.
[0014] Preferably, the telescopic power mechanism is a telescopic oil cylinder 3 , a cylinder body 31 of the telescopic oil cylinder 3 is fixedly arranged on the fixed mold frame 42 , and a piston rod 32 of the telescopic oil cylinder 3 is fixedly connected to the steering member 21 through a connecting plate 33 .
[0015] Preferably, the connecting plate 33 is connected to the steering member 21 by bolts. The connecting plate 33 is connected to the steering member 21 by bolts, which can facilitate disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 . Schematic diagram of the overall structure of the extrusion device for the die-casting mold;
[0017] Figure 2 .Schematic diagram of the top structure of the extrusion device for the die-casting mold;
[0018] Figure 3 .Schematic diagram of the side structure of the extrusion device for the die-casting mold;
[0019] Figure 4 .Schematic diagram of the other side of the extrusion device for the die-casting mold;
[0020] Figure 5 . Figure 3 Schematic diagram of the middle AA section;
[0021] Figure 6 . Figure 3 Schematic diagram of the middle BB section;
[0022] Figure 7 .Schematic diagram of the overall structure of the extrusion pin.
[0023] In the figure, 1. extrusion pin, 11. slide groove, 2. steering device, 21. steering member, 211. steering rod, 212. slider, 22. guide plate, 221. avoidance hole, 222. guide groove, 223. sliding space, 23. mounting plate, 3. telescopic cylinder, 31. cylinder body, 32. piston rod, 33. connecting plate, 34. fixed block, 4. die-casting mold, 41. fixed mold core, 42. fixed mold frame, 43. extrusion hole. DETAILED DESCRIPTION
[0024] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0025] like Figure 1 and Figure 2 As shown, the die-casting mold uses an extrusion device, and the die-casting mold 4 includes a fixed mold core 41 and a fixed mold frame 42 that is fitted on the outer side of the fixed mold core 41.
[0026] The extrusion device includes an extrusion pin 1, a steering device 2 and a telescopic power mechanism. The fixed mold core 41 and the fixed mold frame 42 are provided with an extrusion hole 43 that matches the extrusion pin 1. The extrusion pin 1 is slidably inserted into the extrusion hole 43, with one end located outside the fixed mold frame 42 and the other end located inside the fixed mold core 41. Figure 3 .
[0027] The steering device 2 includes a guide plate 22 and a steering member 21. The guide plate 22 is fixed on the fixed mold frame 42 through the mounting plate 23 and is parallel to the fixed mold frame 42. A sliding space 223 is formed in the middle for the guide block to slide. An avoidance hole 221 is provided on the guide plate 22 at the position corresponding to the extrusion pin 1.
[0028] The steering member 21 is slidably disposed in the sliding space 223 and is slidably connected to the extrusion pin 1 , and is used to drive the extrusion pin 1 to slide back and forth along the extrusion hole 43 during reciprocating motion.
[0029] The telescopic power mechanism is a telescopic oil cylinder 3, the cylinder body 31 of the telescopic oil cylinder 3 is fixedly set on the fixed mold frame 42 through a fixing block 34, and the piston rod 32 of the telescopic oil cylinder 3 is fixedly connected to the steering member 21 through a connecting plate 33, driving the steering member 21 to slide back and forth.
[0030] The connecting plate 33 is connected to the steering member 21 by bolts, see Figure 3 The connecting plate 33 is connected to the steering member 21 by bolts, which can facilitate disassembly and maintenance.
[0031] When the telescopic oil cylinder 3 pushes the steering piece 21 to slide to the right, the steering piece 21 converts the force to the right into the force to drive the extrusion pin 1 to move in the vertical upward direction, so that the extrusion pin 1 slides upward; when the telescopic oil cylinder 3 pushes the steering piece 21 to slide to the left, the steering piece 21 converts the force to the left into the force to drive the extrusion pin 1 to move in the vertical downward direction, so that the extrusion pin 1 slides downward, thereby achieving the purpose of extruding the thick part of the die casting product.
[0032] The telescopic power mechanism is not required to be installed in the fixed mold frame 42, the limitation on the cylinder diameter is removed, so that the extrusion oil cylinder can be replaced by a common telescopic power mechanism when the mold is manufactured, the ejection force is ensured, the phenomenon that the extrusion is not in place does not occur, the die casting mold strength is improved, the cost is saved, and the extrusion oil cylinder failure rate is reduced.
[0033] As shown in Figure 3 , Figure 4 and Figure 5 , the steering piece 21 comprises a steering rod 211 which is inclinedly arranged and a sliding block 212 which is arranged at each end of the steering rod 211, the steering rod 211 is inclinedly arranged along the sliding direction of the steering piece 21, the inclination angle of the steering rod 211 is 15°, that is, the included angle between the steering rod 211 and the outer side of the fixed mold frame 42 is 15°, and the steering rod 211 is inserted into the sliding groove 11 of the extrusion pin 1 and is in sliding connection with the extrusion pin 1.
[0034] The extrusion pin 1 is provided with the sliding groove 11 corresponding to the steering rod 211, the inclination angle of the sliding groove 11 is the same as that of the steering rod 211, the extrusion pin 1 is in sliding connection with the steering rod 211 through the sliding groove 11, and Figure 7 .
[0035] Through cooperation of the steering rod 211 and the extrusion pin 1, when the steering piece 21 slides to the right, the force to the right is converted into the force to drive the extrusion pin 1 to move in the vertical upward direction, so that the extrusion pin 1 slides upward; when the steering piece 21 slides to the left, the force to the left is converted into the force to drive the extrusion pin 1 to move in the vertical downward direction, so that the extrusion pin 1 slides downward, thereby achieving the purpose of extruding the thick part of the die casting product.
[0036] The steering piece 21 is provided with two steering pieces 21 which are arranged at the two sides of the extrusion pin 1. The steering piece 21 is arranged at each side of the extrusion pin 1, so that the extrusion pin 1 is balanced in force and is prevented from being inclined due to uneven force and being difficult to slide.
[0037] As shown in Figure 6As shown, the guide plate 22 is provided with a guide groove 222 corresponding to the slider 212. The guide groove 222 extends along the sliding direction of the steering member 21, and the slider 212 is slidably disposed in the guide groove 222. The guide groove 222 can be used to position the sliding direction of the steering member 21, preventing the steering member 21 from being tilted due to force and thus failing to push the extrusion pin 1 to move.
[0038] The present invention provides a steering member 21, which is slidably mounted outside the fixed die frame 42. The telescopic cylinder 3 is fixedly mounted on the fixed die frame 42 and connected to the extrusion pin 1. The steering member 21 converts the left-right force of the telescopic cylinder 3 into a vertical force, thereby pushing the extrusion pin 1 up and down. The present invention eliminates the need to mount the telescopic cylinder 3 inside the fixed die frame 42, removing the restriction on cylinder diameter. This allows the extrusion cylinder to be replaced with a conventional telescopic cylinder 3 during mold manufacturing, ensuring ejection force and preventing the occurrence of inadequate extrusion. This improves the strength of the die-casting mold, saves costs, and reduces the failure rate of the telescopic cylinder 3.
[0039] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.
Claims
1. An extrusion device for a die-casting mold, wherein the die-casting mold (4) comprises a fixed mold core (41) and a fixed mold frame (42) arranged on the outside of the fixed mold core (41), characterized in that: The extrusion device comprises an extrusion pin (1), a steering device (2) and a telescopic power mechanism. The fixed mold core (41) and the fixed mold frame (42) are provided with extrusion holes (43) that match the extrusion pins (1); The extrusion pin (1) is slidably arranged in the extrusion hole (43), with one end located outside the fixed mold frame (42) and the other end located inside the fixed mold; The steering device (2) comprises a steering member (21), The steering member (21) is slidably arranged outside the fixed mold frame (42) and is slidably connected to the extrusion pin (1), and is used to drive the extrusion pin (1) to slide back and forth along the extrusion hole (43) during reciprocating motion; The telescopic power mechanism is fixedly arranged on the fixed mold frame (42), and the telescopic power mechanism has a telescopic mechanism, which is connected to the steering member (21) through the telescopic mechanism to drive the steering member (21) to slide back and forth.
2. The extrusion device for die casting mold according to claim 1, characterized in that The steering member (21) comprises a tilted steering rod (211) and sliders (212) respectively arranged at both ends of the steering rod (211). The steering rod (211) is arranged obliquely along the sliding direction of the steering member (21); The extrusion pin (1) is provided with a sliding groove (11) corresponding to the steering rod (211), and the sliding groove (11) and the steering rod (211) have the same inclination angle; The steering rod (211) is inserted into the slide groove (11) and is slidably connected to the extrusion pin (1).
3. The extrusion device for die casting mold according to claim 2, characterized in that The steering device (2) further comprises a guide plate (22), The guide plate (22) is fixedly mounted on the fixed die frame (42) via a mounting plate (23), is located outside the steering member (21), is parallel to the fixed die frame (42), and forms a sliding space (223) in the middle for the guide block to slide, and an avoidance hole (221) is provided on the guide plate (22) at a position corresponding to the extrusion pin (1); The steering member (21) is slidably disposed in the sliding space (223).
4. The extrusion device for die casting mold according to claim 3, characterized in that The guide plate (22) is provided with a guide groove (222) corresponding to the slider (212). The guide groove (222) extends along the sliding direction of the steering member (21); The slider (212) is slidably disposed in the guide groove (222).
5. The extrusion device for die casting mold according to claim 4, characterized in that The steering members (21) are provided with two, The two steering members (21) are respectively arranged on both sides of the extrusion pin (1).
6. The extrusion device for a die casting mold according to any one of claims 1 to 5, characterized in that: The telescopic power mechanism is a telescopic oil cylinder (3). The cylinder body (31) of the telescopic oil cylinder (3) is fixedly arranged on the fixed mold frame (42), and the piston rod (32) of the telescopic oil cylinder (3) is fixedly connected to the steering member (21) via a connecting plate (33).
7. The extrusion device for die casting mold according to claim 6, characterized in that The connecting plate (33) is connected to the steering member (21) via bolts.