Die casting mold structure with slider pawl type positioning preventing slider from retreating
By employing a tiger-mouth positioning groove and protrusion engagement structure and a slider design made of hard material in the die-casting mold, the problem of slider retraction under high temperature and high pressure is solved, thereby achieving mold stability and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN BONTECK HARDWARE
- Filing Date
- 2025-08-20
- Publication Date
- 2026-08-04
AI Technical Summary
In existing die-casting molds, the slider tends to retract under high temperature and high pressure, resulting in substandard dimensional accuracy of the molded products, accumulation of slag inside the mold, affecting production rhythm and shortening mold life.
It adopts a locking structure of tiger mouth positioning groove and tiger mouth positioning protrusion, combined with a slider and mold core made of hard material. The included angle design prevents the slider from moving backward. Stable locking is achieved through the cooperation of the inclined insertion rod and the wear-resistant block of the shovel base.
It effectively prevents the slider from sliding back, reduces product defects and mold damage, extends mold life, and reduces subsequent processing costs.
Smart Images
Figure CN224586950U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of die casting mold technology, and in particular to a die casting mold structure with a slider jaw positioning to prevent slider backing. Background Technology
[0002] In the production and application of slider core-pulling die-casting molds, existing technologies generally adopt a single shovel base positioning and anti-backward structure, including insert-type shovel bases or original shovel bases. However, the working environment of die-casting molds is characterized by high temperature and high pressure. At the moment of production, the mold as a whole will be subjected to severe high temperature and high pressure impact. Under this impact, the slider is prone to slight backward movement, which directly leads to the dimensional accuracy and shape quality of the molded product not meeting the design requirements.
[0003] To correct these defects, subsequent production requires additional CNC machining or manual polishing processes, increasing production costs and labor time. More seriously, as production continues, the frequent retraction of the slider gradually creates tiny gaps inside the mold, which easily trap slag and other debris. As slag accumulates, the mold will experience difficulty closing, affecting normal production rhythm. In extreme cases, it may even lead to mold cracking and scrapping, significantly shortening the mold's lifespan and increasing production losses for the company. Utility Model Content
[0004] To address the technical problems existing in the background art, this utility model proposes a die-casting mold structure with a slider tiger-mouth positioning to prevent the slider from retracting.
[0005] This utility model proposes a die-casting mold structure with a slider jaw-type positioning to prevent slider backing, comprising a rear mold blank and a front mold blank. A rear mold core is installed on the top of the rear mold blank, and a slide block is slidably arranged inside the rear mold core. A slider is connected to the inner side of the slide block, and a jaw-type positioning groove is opened at the top of the slider. A front mold core is installed on the bottom of the front mold blank, and a jaw-type positioning protrusion is connected inside the front mold core. The jaw-type positioning protrusion is adapted to the jaw-type positioning groove, and after the rear mold blank and the front mold blank are closed, the jaw-type positioning protrusion and the jaw-type positioning groove are engaged. The angle between the jaw-type positioning groove and the vertical direction is greater than the angle between the shovel base wear-resistant block and the inclined insert rod and the vertical direction.
[0006] Furthermore, a groove is formed inside the rear mold core, and the slide block slides inside the groove.
[0007] Furthermore, a slide base surface is provided on the outer side of the slide block, and a wear-resistant block is installed on the inner side of the front mold core. The inclination angle of the wear-resistant block is adapted to the slide base surface.
[0008] Furthermore, the slide block has an inclined insertion hole inside, and the front mold core is connected to an inclined insertion rod inside. After the rear mold blank and the front mold blank are closed, the inclined insertion rod is inserted into the inclined insertion hole to drive the slide block to slide.
[0009] Furthermore, the interior of the rear mold core has a flow channel that communicates with the molding groove to guide the injection liquid into the molding groove.
[0010] Furthermore, the upper surface of the rear mold blank has several positioning holes, and the lower surface of the front mold blank has several positioning pins connected to it. After the rear mold blank and the front mold blank are closed, the positioning pins are inserted into the positioning holes.
[0011] Furthermore, the angle between the tiger-mouth positioning groove and the vertical direction is set to 30°, the angle between the shovel base wear-resistant block and the vertical direction is set to 25°, and the angle between the inclined insertion rod and the vertical direction is set to 23°.
[0012] The beneficial effects of this utility model are as follows: By setting a tiger-mouth positioning groove at the top of the slider and forming a locking structure with the tiger-mouth positioning protrusion of the front mold core, and the angle between the tiger-mouth positioning groove and the vertical direction is greater than the angle between the wear-resistant block of the shovel base and the inclined rod, combined with the high stability characteristics of the slider and the front mold core being made of hard material, it can effectively prevent the slider from retreating under the high temperature and high pressure impact of die casting, avoid product size exceeding specifications, shape steps and other defects, reduce subsequent CNC machining or manual grinding processes, and at the same time prevent the accumulation of slag in the mold due to the slide retreat, which can lead to difficulties in mold closing, cracking or even scrapping, thus extending the service life of the mold. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the rear mold blank in this utility model; Figure 3 This is a schematic diagram of the structure of the front mold blank in this utility model; Figure 4 This is a half-sectional view of the present invention; Figure 5 This is a schematic diagram showing the angles of the tiger-mouth positioning groove, the inclined insertion rod, and the wear-resistant block of the shovel base of this utility model.
[0014] In the diagram: 1. Rear mold blank; 11. Rear mold core; 12. Slide block; 13. Slider; 14. Slot positioning groove; 15. Slide groove; 16. Slide block base surface; 17. Angled insertion hole; 18. Runner; 19. Positioning hole; 2. Front mold blank; 21. Front mold core; 22. Slot positioning protrusion; 23. Slot base wear-resistant block; 24. Angled insertion rod; 25. Positioning pin; 3. Product. Detailed Implementation
[0015] Reference Figure 1-5 The die-casting mold structure with slider gripper-type positioning to prevent slider backing proposed in this utility model consists of a rear mold blank 1 and a front mold blank 2. The two work together through mold closing and mold opening actions to complete the die-casting operation. The specific technical solution is as follows: A rear mold core 11 is fixedly installed at the top of the rear mold blank 1. A groove 15 is formed inside the rear mold core 11. A slide block 12 is slidably disposed inside the groove 15. The groove 15 provides precise guidance for the sliding of the slide block 12, allowing it to slide stably along the extension direction of the groove 15. A slider 13 is fixedly connected to the inner side of the slide block 12. The slider 13 performs core-pulling or resetting actions as the slide block 12 slides. A tiger-mouth positioning groove 14 is formed at the top of the slider 13. The angle between the tiger-mouth positioning groove 14 and the vertical direction is set to 30°, for use with... The positioning structure of the front mold part is used to achieve the anti-backward function. At the same time, the outer side of the slide block 12 is provided with a slide block shovel base surface 16, and the inside is provided with an inclined insertion hole 17, which is used to cooperate with the driving component of the front mold part. The interior of the rear mold core 11 is also provided with a flow channel 18 connected to the molding groove. The flow channel 18 is the channel for the die casting liquid to enter the molding groove, which can accurately guide the liquid into the molding groove to ensure the supply of raw materials for product molding. The upper surface of the rear mold blank 1 is also provided with several positioning holes 19 for accurate positioning of the front and rear molds. A front mold core 21 is installed at the bottom of the front mold blank 2. The front mold core 21 and the rear mold core 11 cooperate to form the cavity for product molding. The front mold core 21 is internally connected to a tiger's mouth positioning protrusion 22, a shovel base wear-resistant block 23, and a slanted insert 24. The tiger's mouth positioning protrusion 22 is adapted to the tiger's mouth positioning groove 14 on the slider 13. After the rear mold blank 1 and the front mold blank 2 are closed, the tiger's mouth positioning protrusion 22 and the tiger's mouth positioning groove 14 are tightly engaged. The 30° included angle design provides a strong locking force to prevent the slider from moving backward. The shovel base wear-resistant block 23 is adapted to the inclination angle of the slider base surface 16. The included angle in the vertical direction is set to 25°. During the mold closing process, the sliding block 12 is pushed to slide and reset by fitting with the base surface 16 of the sliding block spatula. The inclined insertion rod 24 is adapted to the inclined insertion hole 17 inside the sliding block 12. Its included angle with the vertical direction is set to 23°. When the mold is closed, it is inserted into the inclined insertion hole 17 to drive the sliding block 12 to slide. When the mold is opened, the sliding block 12 is driven to slide in the opposite direction by the withdrawal action. Several positioning pins 25 are also connected to the lower surface of the front mold blank 2. The positioning pins 25 are adapted to the positioning holes 19 on the rear mold blank 1. After the mold is closed, the positioning pins 25 are inserted into the positioning holes 19 to ensure that the rear mold blank 1 and the front mold blank 2 are accurately aligned. During the mold closing process, the front mold blank 2 drives the front mold core 21 to move closer to the rear mold blank 1. The positioning pin 25 is first inserted into the positioning hole 19 to achieve initial positioning. As the mold closing action continues, the shovel base wear-resistant block 23 gradually fits against the slide base surface 16, pushing the slide 12 to slide inward along the slide groove 15. At the same time, the inclined insertion rod 24 is inserted into the inclined insertion hole 17 to further drive the slide 12 to accurately reset. Finally, the tiger mouth positioning protrusion 22 and the tiger mouth positioning groove 14 are completely engaged, completing the mold closing. Since the included angle (30°) of the tiger mouth positioning groove 14 is greater than the included angle of the shovel base wear-resistant block 23 (25°) and the inclined insertion rod 24 (23°), and a reasonable gap is reserved between each component, there is no interference in the mold closing process. At this time, the tiger mouth positioning structure forms a stable lock to resist the high temperature and high pressure impact during die casting. During the mold opening process, the front mold blank 2 drives the front mold core 21 to move away from the rear mold blank 1. The inclined insertion rod 24 is pulled out from the inclined insertion hole 17. Under the action of the inclined force, it pushes the slide block 12 to slide outward along the slide groove 15. The shovel base wear-resistant block 23 moves with the front mold core 21 and separates from the slide block shovel base surface 16. The tiger mouth positioning protrusion 22 disengages from the tiger mouth positioning groove 14. Because the included angle of each component is reasonably designed, the gaps between each component are properly matched during the mold opening process, and there is no movement interference. Finally, the slider 13 completes the core pulling action with the slide block 12, which facilitates the removal of the molded product.
[0016] In addition, both the slider 13 and the front mold core 21 are made of hard material, and the hardness can reach HRC46~48 after heat treatment. They have excellent strength and hardness and are not easily deformed. Compared with the traditional shovel base structure made of soft material, the tiger mouth positioning structure of this utility model has higher stability, can effectively prevent the slider from moving backward for a long time, reduce product defects and mold damage problems, and extend the service life of the mold.
[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A die casting mold structure having a slide finger positioning preventing the slide from retreating, comprising a back mold block (1) and a front mold block (2), characterized in that, The rear mold blank (1) is fitted with a rear mold core (11) on top. A slide block (12) is slidably arranged inside the rear mold core (11). A slider (13) is connected to the inner side of the slide block (12). A tiger mouth positioning groove (14) is opened at the top of the slider (13). The front mold blank (2) is fitted with a front mold core (21) on the bottom. A tiger mouth positioning protrusion (22) is connected inside the front mold core (21). The tiger mouth positioning protrusion (22) is adapted to the tiger mouth positioning groove (14). After the rear mold blank (1) and the front mold blank (2) are closed, the tiger mouth positioning protrusion (22) and the tiger mouth positioning groove (14) are engaged. The angle between the tiger mouth positioning groove (14) and the vertical direction is greater than the angle between the shovel base wear-resistant block (23) and the inclined rod (24) and the vertical direction.
2. The die casting mold structure with a slide pawl finger-tip positioning preventing the slide from retreating according to claim 1, characterized by, The rear mold core (11) has a groove (15) inside, and the slide block (12) slides inside the groove (15).
3. The die-casting mold structure with slider jaw-type positioning to prevent slider backing as described in claim 1, characterized in that, The outer side of the slide block (12) is provided with a slide block shovel base surface (16), and the inner side of the front mold core (21) is provided with a shovel base wear-resistant block (23). The shovel base wear-resistant block (23) is adapted to the inclination angle of the slide block shovel base surface (16).
4. The die casting mold structure with a slide pawl finger-tip positioning preventing the slide from retreating according to claim 1, characterized by, The slide block (12) has an inclined insertion hole (17) inside. The front mold core (21) is connected to an inclined insertion rod (24). After the rear mold blank (1) and the front mold blank (2) are closed, the inclined insertion rod (24) is inserted into the inclined insertion hole (17) to drive the slide block (12) to slide.
5. The die casting mold structure with a slide pawl finger-tip positioning preventing the slide from retreating according to claim 1, wherein, The interior of the rear mold core (11) has a flow channel (18) that communicates with the molding groove to guide the injection liquid into the molding groove.
6. The die casting mold structure with a slide pawl finger-tip positioning preventing the slide from retreating according to claim 1, wherein, The upper surface of the rear mold blank (1) has several positioning holes (19), and the lower surface of the front mold blank (2) is connected with several positioning pins (25). After the rear mold blank (1) and the front mold blank (2) are closed, the positioning pins (25) are inserted into the positioning holes (19).
7. The die casting mold structure with a slide pawl finger-tip positioning preventing the slide from retreating according to claim 1, wherein, The angle between the tiger mouth positioning groove (14) and the vertical direction is set to 30°, the angle between the shovel base wear-resistant block (23) and the vertical direction is set to 25°, and the angle between the inclined insertion rod (24) and the vertical direction is set to 23°.