Sliding block spring side core-pulling mechanism of injection mold cavity
By using a slider spring-side core extraction mechanism in the injection mold, and using oblique cutting fit and spring elasticity, the core extraction and mold release of the cavity-side structure is achieved, solving the problems of increasing the specific volume of the existing mold and high equipment costs. It is suitable for small injection molding machines to save costs and energy consumption.
Patent Information
- Application Number
- CN202421924098.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-09
AI Technical Summary
When existing injection molds realize the core extraction characteristics of the cavity side, the strokes required for the core extraction cylinder and the core extraction lead to an increase in the mold volume, which requires medium and large injection molding machines to be processed, which increases the cost of equipment investment and production energy consumption.
The injection mold cavity slider spring-side core pulling mechanism is adopted. By setting a slider spring core pulling structure on the outer wall of the cavity plate, the oblique cutting of the core pulling tiles and the upper and lower inclined surfaces is used to convert the vertical movement of the upper and lower slides into the lateral side core pulling direction of the core pulling tiles, and the core pulling release of the product cavity-side structure is achieved through spring elastic assistance.
This solution achieves the smooth core removal of the product cavity side structure, and the entire side core extraction mechanism is arranged vertically, all under the cavity composite plate, without increasing the volume of the mold, making the mold suitable for small injection molding machine processing, saving equipment investment costs and reducing production energy consumption.
Smart Images
Figure CN223013790U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a side core-pulling mechanism of a cavity slider spring for an injection mold, belonging to the field of injection molds. Background Art
[0002] When producing plastic products using an injection mold, according to the analysis of the product structure and shape, if the product on the cavity side of the mold has a core-pulling feature, then this core-pulling feature usually uses a direct core-pulling demolding by an oil cylinder. That is, a core-pulling oil cylinder is arranged on the outer wall of the cavity plate of the mold, a core-pulling slider is arranged in the cavity plate, a core-pulling rod is connected to the core-pulling slider, and the core-pulling rod cooperates with the core-pulling feature on the cavity side of the product. During demolding, usually before the mold is opened, the core-pulling rod on the core-pulling slider is directly pulled out from the core-pulling feature of the product by the core-pulling oil cylinder. The structure is simple and the core-pulling is convenient. However, in actual production, the entire core-pulling oil cylinder hangs outside the cavity plate, and together with the stroke required for core-pulling, it causes the volume of the entire mold to increase significantly, resulting in that small molds require medium and large injection molding machines to process, greatly increasing the equipment investment cost and production energy consumption. Summary of the Invention
[0003] The purpose of the utility model is to overcome the shortcomings of the existing technology and provide a side core-pulling mechanism of a cavity slider spring for an injection mold.
[0004] To achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The side core-pulling mechanism of the cavity slider spring for the injection mold includes a cavity composite plate and a core composite plate. A cavity plate is arranged under the cavity composite plate, a mold foot is arranged on the core composite plate, an upper top plate and a lower top plate are arranged between the mold feet, a core plate is arranged on the mold foot, and the gap between the core plate and the cavity plate forms a mold cavity. There is a molded product in the mold cavity, and a groove is made on the product. A slider spring core-pulling structure is arranged on the outer wall of the cavity plate. The slider spring side core-pulling structure includes a fixing plate, which is fixed under the cavity composite plate and is vertically parallel to the cavity plate. Upper sliders and lower sliders are symmetrically arranged on the inner wall of the fixing plate. An upper inclined surface is arranged on the upper slider, and a lower inclined surface is arranged on the lower slider. A core-pulling block is arranged in the cavity plate, a core-pulling rod is arranged on the core-pulling block, the core-pulling rod passes through the cavity plate and cooperates with the groove, a spring is sleeved on the outer wall of the core-pulling block, the outer end of the core-pulling block extends outside the cavity plate and is in oblique cutting cooperation with the upper inclined surface and the lower inclined surface. The upper sliders and the lower sliders are driven by power to move towards each other or away from each other.
[0006] Furthermore, an upper inclined guide groove is arranged on the upper inclined surface, a lower inclined guide groove is arranged on the lower inclined surface, upper inclined guide bars and lower inclined guide bars are arranged at the outer end of the core-pulling block, and the upper inclined guide bars cooperate with the upper inclined guide grooves, and the lower inclined guide bars cooperate with the lower inclined guide grooves.
[0007] Further, the power driving the upper slider to move includes arranging a compression spring in the cavity backing plate. The compression spring extends out of the cavity backing plate and abuts against the upper slider, and the elastic force of the compression spring is less than that of the spring. The power driving the lower slider to move includes arranging a support plate on the fixed plate, installing an oil cylinder on the support plate, and connecting the piston rod of the oil cylinder to the lower slider.
[0008] Further, an upper limit groove is arranged in the upper slider, and a lower limit groove is arranged in the lower slider. The fixed plate is provided with corresponding upper limit pins and lower limit pins. The upper limit pins are matched with the upper limit groove, and the lower limit pins are matched with the lower limit groove.
[0009] Further, a guide hole is arranged in the core-pulling block, and a guide rod is arranged on the fixed plate. The guide rod is matched with the guide hole.
[0010] The beneficial effects of the present utility model are as follows:
[0011] Through the oblique cutting cooperation of the core-pulling block with the upper inclined surface and the lower inclined surface, the vertical movement directions of the upper slider and the lower slider are converted into the lateral core-pulling direction of the core-pulling block, and with the assistance of the spring elastic force, the core-pulling demolding of the side structure of the product cavity is successfully realized. In particular, the fixed plate and the cavity plate are vertically arranged in parallel, that is, the whole side core-pulling mechanism is vertically arranged and is all below the cavity backing plate, without increasing the volume of the mold, making the mold suitable for processing by a small injection molding machine, saving the equipment investment cost and reducing the production energy consumption. Description of the Drawings
[0012] Figure 1 is a schematic diagram of the mold closing state of the cavity slider spring side core-pulling mechanism of the injection mold of the present utility model;
[0013] Figure 2 is a schematic diagram of the core-pulling state of the cavity slider spring side core-pulling mechanism of the injection mold of the present utility model;
[0014] Figure 3 is a schematic diagram of the mold opening state of the cavity slider spring side core-pulling mechanism of the injection mold of the present utility model. Detailed Embodiments
[0015] The following further describes the present utility model in detail with reference to the specification drawings and specific embodiments.
[0016] Such as Figure 1 — Figure 3As shown in the figure, the injection mold cavity slider spring side core-pulling mechanism includes a cavity composite plate 1 and a core composite plate 2. A cavity plate 3 is arranged under the cavity composite plate, a mold foot 4 is arranged on the core composite plate, an upper top plate 5 and a lower top plate 6 are arranged between the mold feet, a core plate 7 is arranged on the mold foot. The gap between the core plate 7 and the cavity plate 3 forms a mold cavity 8. There is a molded product 9 in the mold cavity. A groove 10 is made on the product. In an actual product, other structures such as holes, buckles and ribs can be made on the product, not limited to the groove 10. A slider spring core-pulling structure is arranged on the outer wall of the cavity plate 3. The slider spring side core-pulling structure includes a fixing plate 11. The fixing plate 11 is fixed under the cavity composite plate 1 and is vertically parallel to the cavity plate 3. An upper slider 12 and a lower slider 13 are symmetrically arranged on the inner wall of the fixing plate. An upper inclined surface 15 is arranged on the upper slider 12, and a lower inclined surface 16 is arranged on the lower slider 13. A core-pulling block 17 is arranged in the cavity plate 3. A core-pulling rod 18 is arranged on the core-pulling block. The core-pulling rod 18 passes through the cavity plate and is matched with the groove 10. A spring 19 is sleeved on the outer wall of the core-pulling block 17. The outer end of the core-pulling block 17 extends out of the cavity plate 3 and is obliquely cut and matched with the upper inclined surface 15 and the lower inclined surface 16. The upper slider 12 and the lower slider 13 are driven by power to move towards each other or away from each other.
[0017] In the slider spring side core-pulling mechanism of this technical solution, after the product 9 is molded, the core-pulling rod 18 is inserted into the groove 10. Therefore, before the product is demolded, the core-pulling rod 18 needs to be pulled out of the groove 10 first. When core-pulling, the core plate 7 and the cavity plate 3 do not open the mold first. First, the upper slider 12 and the lower slider 13 are driven by power to move away from each other, that is, the upper inclined surface 15 and the lower inclined surface 16 slide away from the outer end of the core-pulling block 17. The core-pulling block 17 slides outwards under the elastic force of the spring 19, and the core-pulling rod 18 is pulled out of the groove 10. When resetting, the upper slider 12 and the lower slider 13 are driven by power to move towards each other, that is, the reverse action, and the reset can be realized. The action is simple and the core-pulling is convenient. Its beneficial effects are: through the oblique cut cooperation between the core-pulling block and the upper and lower inclined surfaces, the vertical movement direction of the upper and lower sliders is converted into the lateral core-pulling direction of the core-pulling block, and with the assistance of the spring elastic force, the core-pulling demolding of the side structure of the product cavity is successfully realized. Especially, the fixing plate is vertically parallel to the cavity plate, that is, the whole side core-pulling mechanism is vertically arranged and is all under the cavity composite plate, without increasing the volume of the mold, making the mold suitable for processing by a small injection molding machine, saving the equipment investment cost and reducing the production energy consumption.
[0018] Further, an upper inclined guide groove 20 is arranged on the upper inclined surface 15, a lower inclined guide groove 21 is arranged on the lower inclined surface 16. Upper inclined guide bars 22 and lower inclined guide bars 23 are arranged at the outer end of the core-pulling block 17. The upper inclined guide bar 22 is matched with the upper inclined guide groove 20, and the lower inclined guide bar 23 is matched with the lower inclined guide groove 21. With the cooperation of the inclined guide bars and the inclined guide grooves, the cooperation between the upper and lower sliders and the core-pulling block is closer and the linkage is more reliable.
[0019] In actual production, there are many power sources (structures) driving the upper slider and the lower slider. However, in this technical solution, preferably, the power driving the upper slider includes a compression spring 25 arranged in the cavity compound plate 1. The compression spring 25 extends out of the cavity compound plate 1 and abuts against the upper slider 12, and the elastic force of the compression spring 25 is less than that of the spring 19. The power driving the lower slider includes a support plate 26 arranged on the fixed plate 11, an oil cylinder 27 is installed on the support plate, and the piston rod of the oil cylinder 27 is connected to the lower slider 13.
[0020] During core pulling, the oil cylinder 27 drives the lower slider 13 to move downward, so that the lower inclined surface 16 slides away from the lower part of the outer end of the core pulling block 17. The core pulling block 17 slides outward under the elastic force of the spring 19. Since the elastic force of the compression spring 25 is less than that of the spring 19, the core pulling block 17 squeezes the upper slider 12 upward, and the compression spring 25 is compressed. Finally, the core pulling rod 18 is pulled out of the groove 10, and the core pulling is completed. During reset, the oil cylinder 27 drives the lower slider 13 to move upward, that is, the reverse action can be performed. The upper slider 12 is reset more smoothly under the elastic force of the compression spring 25. This solution can save one oil cylinder, reduce costs and energy consumption. Second, due to the limitation of the core pulling position of the product and the lack of an oil cylinder installation position, a compression spring structure is adopted, which can not only realize core pulling but also contribute to smooth reset, and the design is quite ingenious.
[0021] Further, an upper limit groove 30 is arranged in the upper slider 12, a lower limit groove 31 is arranged in the lower slider 13, corresponding upper limit pins 32 and lower limit pins 33 are arranged on the fixed plate 11. The upper limit pin 32 is matched with the upper limit groove 30, and the lower limit pin 33 is matched with the lower limit groove 31, which can effectively prevent the upper slider and the lower slider from moving excessively and avoid accidents such as collision or detachment.
[0022] A guide hole 35 is arranged in the core pulling block 17, and a guide rod 36 is arranged on the fixed plate 11. The guide rod 36 is matched with the guide hole 35 to guide the outward sliding and reset of the core pulling block, and the action is smoother.
[0023] The above specific embodiments are used to explain and illustrate the present invention. They are only the preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and protection scope of the claims of the present invention fall within the protection scope of the present invention.
Claims
1. An injection mold cavity slider spring side core pulling mechanism comprises a cavity double plate (1) and a core double plate (2), a cavity plate (3) is arranged under the cavity double plate, a mold foot (4) is arranged on the core double plate, an upper top plate (5) and a lower top plate (6) are arranged between the mold feet, a core plate (7) is arranged on the mold foot, a gap between the core plate (7) and the cavity plate (3) constitutes a mold cavity (8), a molded product (9) is arranged in the mold cavity, and a groove (10) is formed on the product, characterized in that: A slider spring core pulling structure is arranged on the outer wall of the cavity plate (3), wherein the slider spring side pulling structure comprises a fixed plate (11), the fixed plate (11) being fixed under the cavity plate (1) and being vertically parallel to the cavity plate (3), an upper slider (12) and a lower slider (13) being symmetrically arranged on the inner wall of the fixed plate, an upper inclined surface (15) being arranged on the upper slider (12), and a lower inclined surface (16) being arranged on the lower slider (13), a core pulling block (17) being arranged in the cavity plate (3), a core pulling rod (18) being arranged on the core pulling block, the core pulling rod (18) passing through the cavity plate and cooperating with the groove (10), a spring (19) being sleeved on the outer wall of the core pulling block (17), an outer end portion of the core pulling block (17) extending out of the cavity plate (3) and being obliquely matched with the upper inclined surface (15) and the lower inclined surface (16), the upper slider (12) and the lower slider (13) being driven by power to move toward or away from each other.
2. The injection mold cavity slider spring side core pulling mechanism according to claim 1, characterized in that An upper inclined guide groove (20) is provided on the upper inclined surface (15), a lower inclined guide groove (21) is provided on the lower inclined surface (16), an upper inclined guide bar (22) and a lower inclined guide bar (23) are provided at the outer end of the core pulling block (17), the upper inclined guide bar (22) cooperates with the upper inclined guide groove (20), and the lower inclined guide bar (23) cooperates with the lower inclined guide groove (21).
3. The injection mold cavity slider spring side core pulling mechanism according to claim 1, characterized in that The power for driving the upper slider to move includes a compression spring (25) arranged in the cavity plate (1), the compression spring (25) extending out of the cavity plate (1) and resting against the upper slider (12), and the elastic force of the compression spring (25) is smaller than the elastic force of the spring (19). The power for driving the lower slider to move includes a support plate (26) arranged on the fixed plate (11), an oil cylinder (27) installed on the support plate, and an oil cylinder rod of the oil cylinder (27) connected to the lower slider (13).
4. The injection mold cavity slider spring side core pulling mechanism according to claim 1, characterized in that An upper limit slot (30) is provided in the upper slider (12), a lower limit slot (31) is provided in the lower slider (13), and a corresponding upper limit pin (32) and lower limit pin (33) are provided on the fixed plate (11); the upper limit pin (32) cooperates with the upper limit slot (30), and the lower limit pin (33) cooperates with the lower limit slot (31).
5. The injection mold cavity slider spring side core pulling mechanism according to claim 1, characterized in that A guide hole (35) is provided in the core-pulling block (17), and a guide rod (36) is provided on the fixing plate (11), wherein the guide rod (36) matches the guide hole (35).