Forming die for rubber shell
By introducing a precision molding chamber, a demolding chute, and a heat dissipation channel into the plastic shell molding die, the problems of mold surface flatness and demolding were solved, thereby improving product quality and production efficiency.
Patent Information
- Application Number
- CN202520079791.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-01-13
AI Technical Summary
The existing plastic shell molding molds have poor surface flatness and imperfect demolding mechanisms, which leads to deformation and cracking of the plastic shells, as well as poor heat dissipation performance, affecting product quality and production efficiency.
A mold structure including a precision molding chamber, a demolding groove, a heat dissipation channel, and heat dissipation fins was designed to ensure a smooth surface of the shell, improve the demolding process, and enhance heat dissipation performance.
It improves the dimensional accuracy and surface flatness of the shell, reduces the scrap rate and production costs, enhances the smoothness of demolding, shortens the molding cycle, and improves production efficiency.
Smart Images
Figure CN223790940U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, specifically to a molding mold for a plastic shell. Background Technology
[0002] A molding die for a plastic shell is a tool used to manufacture plastic shells. It usually consists of two or more parts, including an upper die, a lower die, a middle die, a core, inserts, etc. These parts are heated and pressurized during the manufacturing process to form the plastic shell material into the required shape within the die.
[0003] Common molding dies often suffer from poor surface flatness during the production of plastic shells, which affects the assembly and aesthetics of the product. Furthermore, the imperfect demolding mechanism of the mold can easily cause deformation and cracking of the plastic shell during demolding, reducing the product qualification rate. In addition, the poor heat dissipation performance after the mold is closed leads to heat accumulation during continuous production, resulting in uneven curing of the rubber material, affecting the quality of the plastic shell, increasing the scrap rate, and failing to meet the working requirements of the mold. Therefore, a molding die for plastic shells is proposed. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a molding die for plastic shells, which solves the technical problems of poor surface flatness affecting product assembly and aesthetics, and imperfect demolding mechanism leading to deformation and cracking of the plastic shell during demolding.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a molding die for a plastic shell, comprising:
[0008] The base plate has a lower mold base mounted on its assembly surface, and an upper mold base is covered on the pressing surface of the lower mold base. A precision forming chamber is formed in the middle of the pressing surface of the lower mold base.
[0009] An assembly plate is inserted into the lower part of the inner cavity of the lower mold base. An ejector pin is installed on the upper surface of the assembly plate. The top of the ejector pin penetrates the corresponding position inside the precision forming cavity. A release plate is installed on the top of the ejector pin.
[0010] The demolding spur is located on the top of the lower mold base, on the left and right sides of the precision forming chamber. A heat dissipation channel is provided in the middle of the interior of the upper mold base. The heat dissipation channel is a tubular mesh structure. Each air outlet of the heat dissipation channel is fitted with a pin, and each pin is fitted with a heat dissipation fin.
[0011] Preferably, guide holes are provided at all four corners of the pressing surface of the lower mold base, and guide rods are connected at the four corners of the pressing surface of the upper mold base corresponding to the guide holes, which facilitates mold closing.
[0012] Preferably, the inner wall of the precision molding chamber is finely polished and has a fine diamond-shaped mesh texture, which can effectively improve the flow characteristics of the adhesive, so that the adhesive fills the chamber evenly during the molding process, ensuring the precise size and smooth surface of the molded shell.
[0013] Preferably, the four corners of the pressing surface of the upper mold base are equipped with matching inclined blocks at positions corresponding to the demolding inclined groove, and handles are connected to the middle of the front and rear sides of the assembly plate. The added handles facilitate the up and down movement of the assembly plate.
[0014] Preferably, springs are fitted around the outside of the ejector pins at positions between the assembly plate and the lower mold base. The upper and lower ends of the springs are connected to corresponding positions on the assembly plate and the lower mold base, respectively. The added springs facilitate the up-and-down movement of the assembly plate.
[0015] Preferably, the lower mold base has sliding grooves at all four corners, and sliders are inserted into the sliding grooves. The outer ends of the sliders are connected to the corresponding positions on the outer periphery of the assembly plate, which improves the stability of the assembly plate and the ejector pin when they move up and down.
[0016] (III) Beneficial Effects
[0017] Compared with the prior art, this utility model provides a molding die for a plastic shell, which has the following features:
[0018] Beneficial effects:
[0019] The molding die used for this plastic shell, through the addition of a precision molding chamber, ensures accurate dimensions and a smooth surface, improving product assembly performance and aesthetics, reducing scrap rate, and enhancing product quality. Simultaneously, the up-and-down movement of the assembly plate drives the ejector pins to rise, allowing the plastic shell to be ejected through the demolding plate and with the assistance of the demolding chute. This ensures a smooth demolding process, reduces deformation and breakage during demolding, increases product qualification rate, extends mold life, and lowers production costs. Furthermore, the heat dissipation channels and added heat dissipation fins enhance the speed of heat conduction within the lower mold base, improving the mold's heat dissipation performance. This facilitates rapid temperature reduction within the lower mold base, improves the uniformity of plastic material curing, shortens the molding cycle, increases production efficiency, and meets the needs of large-scale plastic shell production. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2This is a schematic diagram of the assembly structure of the lower mold base and the pin of this utility model;
[0022] Figure 3 This is a schematic diagram of the bottom structure of the upper mold base of this utility model;
[0023] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the lower mold base of this utility model;
[0024] Figure 5 This is a longitudinal sectional view of the lower mold base of this utility model.
[0025] Figure 6 This is an exploded view of the lower mold base structure of this utility model.
[0026] In the diagram: 1. Base plate; 2. Lower mold base; 3. Upper mold base; 4. Guide hole; 5. Guide rod; 6. Precision molding chamber; 7. Assembly plate; 8. Demolding groove; 9. Heat dissipation channel; 10. Pin; 11. Heat dissipation fins; 12. Mating inclined block; 13. Ejector pin; 14. Demolding plate; 15. Spring; 16. Slide groove; 17. Slider; 18. Handle. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] This utility model provides a technical solution: a molding die for a plastic shell, comprising a base plate 1, a lower mold base 2, an upper mold base 3, a guide hole 4, a guide rod 5, a precision molding chamber 6, an assembly plate 7, a demolding groove 8, a heat dissipation channel 9, a pin 10, heat dissipation fins 11, a mating inclined block 12, an ejector pin 13, a demolding template 14, a spring 15, a slide groove 16, a slider 17, and a handle 18.
[0029] Please see Figure 1 The mounting surface of the base plate 1 is equipped with a lower mold base 2, and the pressing surface of the lower mold base 2 is covered with an upper mold base 3. Please refer to [link / reference]. Figure 2 A precision forming chamber 6 is provided in the middle of the pressing surface of the lower mold base 2;
[0030] Assembly plate 7 is inserted into the lower part of the inner cavity of the lower mold base 2. Please refer to [link / reference]. Figure 5 An ejector pin 13 is installed on the upper surface of the assembly plate 7. The top of the ejector pin 13 penetrates the corresponding position inside the precision forming chamber 6. A release template 14 is installed on the top of the ejector pin 13.
[0031] Please see Figure 2 The demolding spur 8 is located on the top of the lower mold base 2, on the left and right sides of the precision molding chamber 6. A heat dissipation channel 9 is located in the center of the interior of the upper mold base 3. (See also...) Figure 4 The heat dissipation channel 9 is a tubular mesh structure. Please refer to [link / reference]. Figure 2 Each air outlet of the heat dissipation channel 9 is equipped with a pin 10, and each pin 10 has a heat dissipation fin 11 installed on its outer end. Please refer to [link / reference]. Figure 1 The lower mold base 2 has guide holes 4 at each of its four corners on the pressing surface. Guide rods 5 are connected to each of the four corners of the upper mold base 3 at positions corresponding to the guide holes 4. The inner wall of the precision molding chamber 6 is finely polished and has a finely textured diamond-shaped grid pattern. Please refer to [link / reference]. Figure 3 Each of the four corners of the pressing surface of the upper mold base 3, corresponding to the demolding groove 8, is equipped with a mating inclined block 12. Please refer to [link / reference]. Figure 2 Handles 18 are connected to the center of both the front and rear sides of the assembly plate 7. The added precision molding chamber 6 ensures accurate dimensions and a smooth surface for the plastic shell, improving product assembly performance and aesthetics, reducing scrap rate, and enhancing product quality. Simultaneously, the up-and-down movement of the assembly plate 7 drives the ejector pins 13 to rise, allowing the plastic shell to be ejected through the demolding template 14 and with the assistance of the demolding chute 8. This ensures a smooth demolding process, reduces deformation and breakage during demolding, improves product qualification rate, extends mold life, and reduces production costs. Furthermore, the heat dissipation channel 9 and added heat dissipation fins 11 increase the speed of heat conduction within the lower mold base 2, improving the mold's heat dissipation performance. This facilitates rapid temperature reduction within the lower mold base 2, improves the uniformity of plastic material curing, shortens the molding cycle, and increases production efficiency, meeting the needs of large-scale plastic shell production. Please refer to [link / reference]. Figure 5 Springs 15 are fitted around the ejector pins 13 at positions between the assembly plate 7 and the lower mold base 2. The upper and lower ends of the springs 15 are connected to corresponding positions on the assembly plate 7 and the lower mold base 2, respectively. (See attached diagram.) Figure 6 The lower mold base 2 has four internal corners with sliding grooves 16, and each sliding groove 16 has a slider 17 inserted inside. The outer ends of the sliders 17 are connected to the corresponding positions on the outer periphery of the assembly plate 7.
[0032] This solution, through the addition of a precision molding chamber 6, ensures accurate dimensions and a smooth surface for the plastic shell, improving product assembly performance and aesthetics, reducing scrap rate, and enhancing product quality. Simultaneously, the up-and-down movement of the assembly plate 7 drives the ejector pin 13 to rise, allowing the plastic shell to be ejected through the demolding template 14 and in conjunction with the demolding chute 8. This ensures a smooth demolding process, reduces deformation and breakage during demolding, increases product qualification rate, extends mold life, and reduces production costs. Furthermore, the heat dissipation channel 9 and the added heat dissipation fins 11 enhance the speed of heat conduction within the lower mold base 2, improving the mold's heat dissipation performance. This facilitates rapid temperature reduction within the lower mold base 2, improves the uniformity of plastic material curing, shortens the molding cycle, increases production efficiency, and meets the needs of large-scale plastic shell production.
[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A molding die for a plastic shell, comprising a base plate, characterized in that: The mounting surface of the base plate is equipped with a lower mold base, the pressing surface of the lower mold base is covered with an upper mold base, and a precision forming cavity is opened in the middle of the pressing surface of the lower mold base. An assembly plate is inserted into the lower part of the inner cavity of the lower mold base. An ejector pin is installed on the upper surface of the assembly plate. The top of the ejector pin penetrates the corresponding position inside the precision forming cavity. A stripper plate is installed on the top of the ejector pin. The lower mold base has demolding grooves on the top and on both sides of the precision forming chamber. The upper mold base has a heat dissipation channel in the middle. The heat dissipation channel is a tubular mesh structure. The air outlet of the heat dissipation channel is inserted with a pin, and the outer end of the pin is equipped with heat dissipation fins.
2. The molding die for a plastic shell according to claim 1, characterized in that: The lower mold base has guide holes at all four corners of its pressing surface, and guide rods are connected to the four corners of the upper mold base at positions corresponding to the guide holes.
3. The molding die for a plastic shell according to claim 1, characterized in that: The inner wall of the precision-molded chamber is finely polished and has a fine diamond-shaped mesh texture.
4. The molding die for a plastic shell according to claim 1, characterized in that: The upper mold base has four corners of the pressing surface with corresponding positions to the demolding groove, and handles are connected to the middle of the front and rear sides of the assembly plate.
5. A molding die for a plastic shell according to claim 1, characterized in that: Springs are fitted around the outside of the ejector pins at positions between the assembly plate and the lower mold base, with the upper and lower ends of the springs connected to corresponding positions on the assembly plate and the lower mold base, respectively.
6. A molding die for a plastic shell according to claim 1, characterized in that: The lower mold base has sliding grooves at its four internal corners, and sliders are inserted into the sliding grooves. The outer ends of the sliders are connected to the corresponding positions on the outer periphery of the assembly plate.