Back pressure sliding block structure of movable die of high-pressure casting die
By introducing a counter-pressure slider structure into the high-pressure casting mold, the problem of die casting sticking to the mold was solved, achieving stable demolding and efficient production of die castings, thus improving product quality and economy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING YUJIANG LANFENG POWERPARTS CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-12
AI Technical Summary
When demolding existing high-pressure die-casting molds, die-cast parts tend to stick to the mold, resulting in surface quality damage, scratches, and difficulty in demolding, which increases scrap rate and production costs.
Design a reverse pressure slider structure for the moving mold of a high-pressure casting mold, including a reverse pressure slider, a core puller and a guide groove. The reverse pressing surface applies vertical pressure to the die-casting part, and the combination of protruding blocks and locking blocks improves the locking force, ensuring the stability and uniform force distribution of the slider.
Reduce demolding difficulty, improve product quality and production efficiency, reduce tearing defects, simplify mold structure, and reduce production costs.
Smart Images
Figure CN224222704U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of die-casting molds, specifically to a counter-pressure slider structure for the moving mold of a high-pressure die-casting mold. Background Technology
[0002] In modern manufacturing, high-pressure die casting technology is widely used in many fields such as automobiles, electronics, and aerospace due to its advantages of high efficiency and high precision, in order to produce metal parts of various complex shapes.
[0003] High-pressure die casting uses the injection device of a die casting machine to inject molten alloy at high speed and high pressure into the mold cavity. Under high pressure, the molten alloy rapidly fills every corner of the cavity. After filling the cavity, a certain pressure is maintained, causing the molten alloy to solidify and form a shape. After the casting cools to a certain extent, the die casting machine opens the mold, the moving mold separates from the fixed mold, and the ejection mechanism on the moving mold pushes the formed casting out of the mold, completing one die casting production cycle. The structure of the die casting mold plays a crucial role in the die casting effect. For example, the mold structure disclosed in the prior art "A Die Casting Mold and Die Casting Process for Partially Thin-Walled Parts" (Publication No.: CN110523952A) allows molten metal to be introduced into the cavity between the fixed mold and the moving mold for forming. At the same time, sliders on both sides are used to assist in forming the raised structures on both sides of the die casting, ultimately completing the forming of the entire die casting. However, this prior art still has the following technical problems:
[0004] During the mold opening process, die-casting molds commonly present the thorny problem of products easily sticking to the fixed mold side. This is mainly due to the structural differences in the fixed mold. The fixed mold usually has protruding structures to form various cavities for the die-casting part. Therefore, during the shrinkage and solidification process of the die-casting part, the die-casting part will exert a clamping force on the protruding structures on the fixed mold, making it easy for the product to stick to the fixed mold during demolding. As with the existing mold structure, after the die-casting part is formed in the cavity at the center of the moving mold and the fixed mold, the liquid metal alloy will surround the protruding part of the fixed mold. During mold opening, varying degrees of sticking to the fixed mold are likely to occur. The sticking problem will cause damage to the surface quality of the die-casting part, resulting in defects such as surface roughness, scratches, peeling, or even missing material. Forced demolding may also cause deformation and cracking of the casting, resulting in substandard product quality, increased scrap rate, and a great waste of raw materials and production costs. Utility Model Content
[0005] This utility model provides a counter-pressure slider structure for the moving mold of a high-pressure casting mold, which can solve the problem in the prior art where the die casting is prone to sticking to the fixed mold and making demolding difficult due to the excessive clamping force of the fixed mold on the die casting during demolding. This can easily lead to defects such as surface scratches on the die casting during demolding, reducing product quality and increasing costs.
[0006] This application provides the following technical solution: a counter-pressure slider structure for a moving mold of a high-pressure casting mold, comprising a moving mold plate, a moving mold core located at the center of the moving mold plate, multiple sets of core pullers fixed in the circumferential direction of the moving mold plate, and multiple counter-pressure sliders located between the core pullers and the moving mold core, wherein the counter-pressure sliders are slidably connected to the moving mold plate; the core pullers are used to drive the counter-pressure sliders to slide horizontally.
[0007] The anti-pressure slider has an extension surface, an anti-clamping surface, and a contouring surface at one end near the moving mold core. The anti-clamping surface is horizontally arranged, the extension surface protrudes towards the moving mold core, and the anti-clamping surface connects with the contouring surface and the extension surface.
[0008] Beneficial effects:
[0009] 1. Reduce demolding difficulty and improve product quality. Due to the structure of die-casting molds, the clamping force on the fixed mold side of the die-casting part is too large, causing the die-casting part to stick to the mold. Although the existing slider technology can apply downward pressure from the middle of the side of the die-casting part to apply demolding force, the structure of die-casting parts is usually irregular, and the cavity size of its circumferential side is different. The contact area between the various sliders and the die-casting part in these cavities is too different, which makes the pressure on different parts of the die-casting part very uneven. It is easy to cause scratches on the inner surface of the die-casting part during demolding. In this solution, after the die-casting part is formed, the extension surface protrudes relative to the direction of the moving mold core, which makes the reverse... The clamping surface can be horizontally clamped onto the upper surface of the die casting. When the mold is opened, as the counter-pressure slider moves with the moving mold plate, all the counter-pressure sliders can apply vertical pressure to the upper surface of the forming edge of the die casting, and the pressure is directed towards the moving mold plate, thereby removing the die casting from the fixed mold. At this time, the force applied by all the counter-pressure sliders to the die casting is applied to the entire edge of the die casting, making the overall force on the die casting more uniform and stable. The die casting can be released from the fixed mold more smoothly, making the demolding process smoother and easier. This greatly reduces the difficulty of demolding the die casting, reduces the tearing defects during product demolding, and improves product quality.
[0010] 2. Reduce processing costs and improve production efficiency. Traditional molds have a push mechanism on the fixed mold side for easier demolding, which uses a push rod to eject the die-casting part stuck to the fixed mold. This solution directly utilizes the mechanical principles of mold opening, combined with the counter-clamping surface of the counter-pressure slider to apply demolding force to the die-casting part. The demolding process is achieved simultaneously with mold opening, eliminating the need for the push mechanism in traditional molds. This simplifies the mold structure, improves production efficiency, and significantly reduces production costs, effectively enhancing economic efficiency.
[0011] Furthermore, the lower end of the counter-pressure slider is provided with a protrusion block, and the side of the moving mold core is provided with a groove, into which the protrusion block is embedded.
[0012] Beneficial effects: Since the counter-pressure slider is slidably connected to the moving mold plate, the locking force of the counter-pressure slider may be insufficient due to the sliding clearance when clamping the die casting. This can easily cause the counter-pressure slider to loosen during mold opening and result in unstable pressure on the die casting. However, by embedding the protrusion into the groove on the side of the moving mold core, the groove of the moving mold core can hold the protrusion and move downward together during mold opening, thereby increasing the locking force of the counter-pressure slider, suppressing the shaking of the counter-pressure slider during mold opening, and improving the smoothness and stability of demolding.
[0013] Furthermore, a guide groove is fixed on the moving mold plate, and the counter-pressure slider is slidably connected in the guide groove.
[0014] Beneficial effects: The guide groove provides a clear motion guide path for the counter-pressure slider, ensuring that the slider can only slide in the preset direction during the sliding process, avoiding offset, skew or shaking caused by uneven force, and ensuring the accuracy of the position of the counter-pressure slider extending into the moving mold core, which helps to improve the forming quality of die castings.
[0015] Furthermore, the anti-pressure slider is provided with an inclined surface, and a locking block is provided on the inclined surface.
[0016] Beneficial effects: The locking block on the inclined surface of the counter-pressure slider can utilize the wedge-tightening characteristics of the inclined surface to generate a large locking force with a small external force. This can prevent the counter-pressure slider from loosening and shifting due to the pressure impact of high-pressure metal injection during the die casting process, thus ensuring the forming quality of the die casting.
[0017] Furthermore, the counter-pressure slider is also provided with a connecting groove, and the core puller is a hydraulic cylinder, with the piston rod end of the hydraulic cylinder engaged in the connecting groove.
[0018] Beneficial effects: The snap-fit connection between the connecting groove and the piston rod enables quick assembly and disassembly, facilitating equipment installation, maintenance, and component replacement, thus improving maintenance efficiency; it ensures that the hydraulic cylinder driving force is stably and efficiently transmitted to the counter-pressure slider, ensuring the accuracy and stability of the slider's movement.
[0019] Furthermore, a bracket is fixed to the side of the moving mold plate, and the core puller is fixed to the bracket.
[0020] Beneficial effects: The bracket securely connects the core puller to the moving mold plate, providing reliable support for the core puller, ensuring its fixed position during operation, ensuring accurate and stable core pulling action, and avoiding product quality issues caused by core pulling deviation due to shaking. Attached Figure Description
[0021] Figure 1 This is the main structural view of the present invention.
[0022] Figure 2 for Figure 1Enlarged view of the counter-pressure slider. Detailed Implementation
[0023] The following detailed description illustrates the specific implementation method:
[0024] The markings in the accompanying drawings include: moving mold plate 1, moving mold core 2, back pressure slider 3, extension surface 301, back snap pressing surface 302, contour surface 303, protrusion block 304, connecting groove 305, inclined surface 306, locking block 4, piston rod 5, guide groove 6, core puller 7, and bracket 8.
[0025] Example 1
[0026] like Figures 1 to 2 As shown, a counter-pressure slider structure for a moving mold of a high-pressure casting mold includes a moving mold plate 1, a moving mold core 2 fixed at the center of the moving mold plate 1, multiple sets of core pullers 7 fixed in the circumferential direction of the moving mold plate 1, and multiple counter-pressure sliders 3 located between the core pullers 7 and the moving mold core 2. (The structure is shown for ease of demonstration.) Figure 1 Only one set of core puller 7 and back pressure slider 3 is retained. Other sets can be selected and set in appropriate positions around the circumference of the moving mold plate 1 according to the actual shape of the die casting.
[0027] A bracket 8 is fixed to the side of the moving mold plate 1, and a core puller 7 is fixed to the bracket 8. In this embodiment, the core puller 7 is a hydraulic cylinder. A guide groove 6 is also fixed on the moving mold plate 1, and the counter-pressure slider 3 is slidably connected in the guide groove 6. The guide groove 6 provides a clear motion guide path for the counter-pressure slider 3, ensuring that the slider can only slide in a preset direction during the sliding process, avoiding deviation, tilting or shaking caused by uneven force.
[0028] like Figure 2 As shown, the tail of the counter-pressure slider 3 is also provided with a connecting groove 305. The inner wall of the connecting groove 305 is semi-circular. The end of the piston rod 5 of the hydraulic cylinder can be inserted into the connecting groove 305 from above, so that when the piston rod 5 of the hydraulic cylinder moves axially, it can drive the counter-pressure slider 3 to slide horizontally on the guide groove 6.
[0029] The tail of the counter-pressure slider 3 is also provided with an inclined surface 306, and a locking block 4 is provided on the inclined surface 306. The locking block 4 can be fixed to the fixed mold with screws. Figure 1 The fixed mold is omitted and is located above the entire moving mold plate 1. After the mold is closed, the locking block 4 can use the wedge-tightening characteristic of the inclined surface 306 to generate a large locking force with a small external force. During the die casting process, it can prevent the pressure impact of the high-pressure metal injection on the counter-pressure slider 3 from causing the counter-pressure slider 3 to loosen and shift, so as to ensure the forming quality of the die casting.
[0030] The lower end of the counter-pressure slider 3 is also provided with a protruding block 304. Figure 1The moving mold core 2 has a groove on its side, into which the protruding block 304 can be embedded. Since the counter-pressure slider 3 is slidably connected to the moving mold sleeve plate 1, the counter-pressure slider 3 may have insufficient locking force due to the sliding clearance when pressing the die casting. This can easily cause the counter-pressure slider 3 to loosen during mold opening and result in unstable pressure on the die casting. However, by embedding the protruding block 304 into the groove on the side of the moving mold core 2, the groove of the moving mold core 2 can hold the protruding block 304 and move downward together during mold opening, thereby increasing the locking force of the counter-pressure slider 3, suppressing the shaking of the counter-pressure slider 3 during mold opening, and improving the smoothness and stability of demolding.
[0031] like Figure 1 and Figure 2 As shown, the counter-pressure slider 3 has an extension surface 301, a counter-clamping surface 302, and a contouring surface 303 at one end near the moving mold core 2. The counter-clamping surface 302 is horizontally arranged, and the extension surface 301 protrudes towards the moving mold core 2. The counter-clamping surface 302 connects with the contouring surface 303 and the extension surface 301. The contouring surface 303 is used to form the cavity wall surface of the die casting to facilitate the formation of the side shape of the die casting. The extension surface 301 protrudes a distance towards the moving mold core 2 so that the counter-clamping surface 302 can be horizontally clamped onto the upper surface of the edge part of the die casting after forming.
[0032] The usage method of this solution is as follows:
[0033] Before die casting, the piston rod 5 of the core puller 7 pushes the counter-pressure slider 3 to slide towards the moving mold core 2, so that the end of the counter-pressure slider 3 extends into the cavity of the moving mold core 2. Then, die casting is performed. After the die casting is formed, the counter-clamping surface 302 will press against the upper surface of the edge of the formed die casting. Then, the mold is opened. The moving mold sleeve 1 drives the core puller 7 and the counter-pressure slider 3 to move downward. During this process, the counter-clamping surfaces 302 of all the counter-pressure sliders 3 can apply downward vertical pressure to the upper surface of the formed edge of the die casting, thereby removing the die casting from the fixed mold. At this time, the force points of all the counter-pressure sliders 3 on the die casting are applied to the entire edge of the die casting, making the overall force of the die casting more uniform and stable. The die casting can be released from the fixed mold more smoothly, making the demolding process smoother and easier. This greatly reduces the difficulty of demolding the die casting, reduces the tearing defects during product demolding, improves product quality and production efficiency, and effectively improves economy.
[0034] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A counter-pressure slider structure for the moving mold of a high-pressure casting mold, characterized in that: It includes a moving mold plate, a moving mold core located at the center of the moving mold plate, multiple sets of core pullers fixed in the circumferential direction of the moving mold plate, and multiple pressure sliders located between the core pullers and the moving mold core. The pressure sliders are slidably connected to the moving mold plate. The core pullers are used to drive the pressure sliders to slide horizontally. The anti-pressure slider has an extension surface, an anti-clamping surface, and a contouring surface at one end near the moving mold core. The anti-clamping surface is horizontally arranged, the extension surface protrudes towards the moving mold core, and the anti-clamping surface connects with the contouring surface and the extension surface.
2. The counter-pressure slider structure of the moving mold of a high-pressure casting mold according to claim 1, characterized in that: The lower end of the counter-pressure slider is also provided with a protruding block, and the side of the moving mold core is provided with a groove, into which the protruding block is embedded.
3. The counter-pressure slider structure of the moving mold of a high-pressure casting mold according to claim 2, characterized in that: The moving mold plate is fixed with a guide groove, and the counter-pressure slider is slidably connected in the guide groove.
4. The counter-pressure slider structure of the moving mold of a high-pressure casting mold according to claim 3, characterized in that: The anti-pressure slider is also provided with an inclined surface, and a locking block is provided on the inclined surface.
5. The counter-pressure slider structure of the moving mold of a high-pressure casting mold according to claim 4, characterized in that: The counter-pressure slider is also provided with a connecting groove, and the core puller is a hydraulic cylinder, with the piston rod end of the hydraulic cylinder engaged in the connecting groove.
6. The counter-pressure slider structure of the moving mold of a high-pressure casting mold according to claim 5, characterized in that: A bracket is fixed to the side of the moving mold plate, and the core puller is fixed to the bracket.