Joint-line-free mold for injection molding and product processing device
By designing molds and devices for injection molding, the problem of no parting line between the internal wires and the side wall of the truncated cone was solved, realizing injection molding without parting lines and improving the sealing and safety of the product in deep water.
Patent Information
- Application Number
- CN202422490363.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-10-15
AI Technical Summary
Existing injection molding equipment cannot produce products where the electrical wire section inside the housing frame does not have a parting line in contact with the side wall of the truncated cone, resulting in a water seepage safety hazard when used in deep water areas.
An injection molding device comprising a first mold, a second mold, and a third mold is designed. The device forms a product body molding cavity and a boss molding cavity without mold parting lines by closing the molds, and uses a lifting mechanism and a pressure mechanism to achieve the injection molding of wires, thus avoiding the generation of mold parting lines.
This technology eliminates the mold line on the sidewalls of wire-coated products, improving the sealing and safety of the housing frame in deep water.
Smart Images
Figure CN223545651U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a mold and product processing device for injection molding without parting lines, belonging to the field of injection molding technology. Background Technology
[0002] Injection molding is a method of shaping a heated and softened material into a given shape using a mold, followed by cooling and solidification to obtain the final product. This method is suitable for mass production and molding of complex-shaped products. However, existing housing frames have a frustum-shaped internal space, requiring a portion of the electrical wire to be injection molded into a matching shape and filled within the frame's internal space. Furthermore, due to its use in deep water, the injection-molded overmolded product must not have parting lines at the contact point with the frustum's sidewalls.
[0003] However, existing injection molding equipment cannot produce products whose contact parts with the sidewalls of the truncated cone do not have parting lines. The presence of parting lines can cause water seepage during deep-water operations, posing a significant safety hazard. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a mold and product processing device for injection molding without parting lines.
[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:
[0006] One embodiment of this utility model provides a mold for injection molding without parting lines, comprising:
[0007] A first mold and a second mold that are matched with each other, wherein the first mold can be closed with the second mold to form a product body molding cavity;
[0008] At least one third mold, the third mold having a boss forming cavity, the boss forming cavity being directly connected to the product body forming cavity, wherein the maximum radial cross-sectional area of the boss forming cavity is greater than the radial cross-sectional area of the product body forming cavity.
[0009] Furthermore, the product body forming cavity includes at least two product body forming cavity segments spaced apart along its own axial direction, and the third mold is disposed between two adjacent product body forming cavity segments.
[0010] Furthermore, the inner diameter of the boss forming cavity gradually decreases from one end to the other.
[0011] Furthermore, the second mold and the first mold are provided with insertion slots. When the first mold and the second mold are closed to form the main body molding cavity of the product, the two ends of the third mold along the radial direction of the boss molding cavity are respectively inserted into the insertion slots.
[0012] Furthermore, the first mold and the second mold are respectively provided with a first tail forming strip and a second tail forming strip. The first tail forming strip can close with the second tail forming strip to form a product step forming cavity. The product step forming cavity is located between the product body forming cavity and the boss forming cavity.
[0013] Furthermore, the first mold and the second mold are respectively provided with a third tail forming strip and a fourth tail forming strip. The third tail forming strip and the fourth tail forming strip can be molded together to form at least a part of the product body forming cavity. The third tail forming strip and the fourth tail forming strip are closely connected to the first tail forming strip and the second tail forming strip along the axial direction of the product body forming cavity.
[0014] Another embodiment of this utility model provides a product processing apparatus for injection molding without parting lines, including the mold for injection molding without parting lines, and at least one pressure applying mechanism, the pressure applying mechanism being connected to at least one of the first mold and the second mold, and used to drive the first mold and the second mold to switch between a mold closed state and a mold open state.
[0015] Furthermore, the first mold is provided with a guide rod, and the second mold is provided with a first guide hole. When the first mold and the second mold are switched to a closed state, the guide rod is inserted into the first guide hole.
[0016] Furthermore, the processing device for injection molding products without parting lines also includes a lifting mechanism, which is used to lift the third mold so that the boss forming cavity and the product body forming cavity are disconnected from each other.
[0017] Furthermore, the lifting mechanism includes a lifting plate, a lifting rod, and a return spring. The lifting rod is disposed on the lifting plate, and the lifting plate is used to drive the lifting rod to lift the third mold. The return spring is disposed on the lifting rod, and the return spring is used to reset the lifting plate after the lifting rod lifts the third mold.
[0018] Furthermore, an ejector guide plate is provided between the lifting mechanism and the second mold, and a second guide hole is provided on the ejector guide plate. When the lifting plate is used to drive the lifting rod to lift the third mold, the lifting rod is inserted into the second guide hole.
[0019] Compared with the prior art, the advantages of this utility model include:
[0020] 1. When the first mold and the second mold are in the closed state, the side wall of the formed frustum-shaped overmolded product is injection molded based on the hole wall of the boss forming cavity. Therefore, the parting line is avoided from being generated on the side wall of the frustum-shaped part of the overmolded product, which meets the usage requirements of the shell frame in deep water area.
[0021] 2. The third and fourth molding grooves respectively opened on the first and second tail molding strips form a step between the wire and the frustum structure after injection molding, which better fits the space inside the shell frame and improves the sealing performance of the overmolded product installed inside the shell frame. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the optimal embodiment of a mold and product processing device for injection molding without parting lines, provided in a typical embodiment of this utility model;
[0024] Figure 2 This is a schematic diagram of the structure of the second mold, which is the preferred embodiment of a mold and product processing device for injection molding without parting lines, provided in a typical embodiment of this utility model.
[0025] Figure 3 This is a schematic diagram of the structure of the first mold, which is the preferred embodiment of a mold and product processing device for injection molding without parting lines, provided in a typical embodiment of this utility model.
[0026] Figure 4 This is a schematic diagram of the lifting mechanism of an optimal embodiment of a mold and product processing device for injection molding without parting lines, provided in a typical embodiment of this utility model;
[0027] Figure 5 This is a third cross-sectional view of the mold, which is the preferred embodiment of a mold and product processing device for injection molding without parting lines, provided in a typical embodiment of this utility model.
[0028] Explanation of reference numerals in the attached drawings: 1. First mold; 2. Second mold; 3. Product body forming cavity; 5. Third mold; 6. Boss forming cavity; 7. Guide rod; 8. First guide hole; 9. Insertion groove; 10. Lifting mechanism; 11. Lifting plate; 12. Lifting rod; 13. Return spring; 14. First mesh tail forming strip; 15. Second mesh tail forming strip; 16. Product step forming cavity; 18. Third mesh tail forming strip; 19. Fourth mesh tail forming strip; 20. Guide plate; 21. Second guide hole. Detailed Implementation
[0029] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.
[0030] Figures 1-5 The diagram shows a preferred embodiment of the present invention, a product processing device for injection molding without parting lines, comprising a first mold, a second mold, and a third mold. The third mold has a boss forming cavity that matches the boss-shaped space in the housing frame. Correspondingly, when the first mold and the second mold are closed, there is a product body forming cavity inside for accommodating the wire product to be injection molded. Furthermore, when the first mold and the second mold are in the closed state, the boss forming cavity and the product body forming cavity are directly connected. The sidewall of the boss structure formed by injection molding on the wire product is formed by injection molding the entire sidewall of the boss product forming cavity as the mold, thus avoiding the generation of parting lines on the sidewall of the boss structure.
[0031] The first mold 1 and the second mold 2 are respectively provided with a third tail forming strip 18 and a fourth tail forming strip 19. The third tail forming strip 18 and the fourth tail forming strip 19, when closed, form at least a part of the main body forming cavity of the product. The main body forming cavity of the product is used to place the wire to be processed. The first mold 1 can move vertically relative to the second mold 2. When the first mold 1 is close to the limit position of the second mold 2, it is in the closed state, at which time a complete wire channel (that is, the main body forming cavity of the product) is formed. When processing, the main body forming cavity of the product plays a role in fixing the wire. The third mold 5 has a boss forming cavity 6. When the wire is placed in the main body forming cavity of the product, the wire passes through the boss forming cavity 6 at the same time, and the side wall of the boss forming cavity 6 has and The structure of the boss space sidewalls inside the shell frame fits together. When the first mold 1 and the second mold 2 are in the mold-closed state, the product body molding cavity and the boss molding cavity 6 are connected and coaxially arranged. When the wire product is placed in the product body molding cavity and heated, the outer coating of the wire will soften and fill the boss molding cavity 6. After cooling and solidification, a boss-shaped structure is formed on the outer coating of the wire. Specifically, the space inside the shell frame is frustum-shaped. Therefore, the aperture of the boss molding cavity 6 in this embodiment gradually decreases from one end to the other end and can fit with the frustum-shaped space inside the shell frame. This makes the sidewall of the boss structure formed by injection molding on the wire free of parting lines, thereby avoiding water seepage caused by parting lines on the sidewall of the frustum-shaped part of the coating when the shell frame is working in deep water. When the first mold 1 moves upward in the vertical direction, the first mold 1 disengages from the mold closing position until the first mold 1 moves away from the second mold 2 to the limit position. At this position, the first mold 1 and the second mold 2 are in a disengaged state, and the wire can be removed from the second forming groove 4.
[0032] The first mold 1 is also provided with a guide rod 7. Correspondingly, the second mold 2 is provided with a first guide hole 8 that matches the guide rod 7. When the first mold 1 and the second mold 2 are in a closed state, the guide rod 7 is inserted into the first guide hole 8 and receives guidance from the first guide hole 8. Furthermore, this embodiment provides one way in which the boss forming cavity 6 and the product body forming cavity are connected, that is, the second mold 2 and the first mold 1 are provided with insertion grooves 9. When the first mold 1 and the second mold 2 are in a closed state, the third mold 5 is inserted into the insertion grooves 9 radially along the boss forming cavity 6, so that the boss forming cavity 6 and the product body forming cavity are connected.
[0033] One embodiment of the injection molding apparatus further includes a lifting mechanism 10. When the first mold 1 and the second mold 2 transition to an open mold state, the lifting mechanism 10 lifts the third mold 5, causing the boss molding cavity 6 and the product body molding cavity to disconnect. The injection-molded wire is then removed along with the third mold 5 for use. The third mold 5 is then placed back into the insertion slot 9 for a new round of operation. The injection molding apparatus for products without parting lines also includes a pressure mechanism connected to the first mold and used to drive the first mold and the second mold to switch between a closed mold state and an open mold state.
[0034] The specific structure of the lifting mechanism 10 is described below: The lifting mechanism 10 includes a lifting plate 11, a lifting rod 12, and a return spring 13. The lifting rod 12 is mounted on the lifting plate 11. The lifting plate 11 is used to drive the lifting rod 12 to lift the third mold 5, so that the boss forming cavity 6 is disengaged from the second forming groove 4. The return spring 13 is mounted on the lifting rod 12. The return spring 13 is used to reset the lifting plate 11 after the lifting rod 12 lifts the third mold 5, that is, to drive the lifting plate 11 to move downward, so that the lifting rod 12 exits the insertion groove 9, and the third mold 5 can be re-inserted into the insertion groove 9. Furthermore, an ejection guide plate 20 is provided between the lifting mechanism 10 and the second mold 2. The ejection guide plate 20 has a second guide hole 21. The lifting rod 12 is guided by the second guide hole 21 during the process of lifting the third mold 5.
[0035] Within the internal space of the housing frame, there is a stepped cavity between the frustum-shaped opening and the channel for accommodating the wire. To ensure that the injection-molded wire can better meet the requirements, a first tail forming strip 14 and a second tail forming strip 15 are respectively provided on the first mold 1 and the second mold 2. The first tail forming strip 14 can close with the second tail forming strip 15 to form a product stepped forming cavity. The product stepped forming cavity is located between the product main body forming cavity and the boss forming cavity. The product stepped forming cavity, the product main body forming cavity, and the boss forming cavity 6 are all coaxially arranged. Furthermore, the inner diameter of the product stepped forming cavity is between the inner diameter of the product main body forming cavity and the inner diameter of the boss forming cavity 6. When the wire is placed in the product main body forming cavity and heated, the outer coating of the wire will soften and simultaneously fill the boss forming cavity 6 and the product stepped forming cavity. After cooling and solidification, a step is formed between the frustum-shaped part of the coated product and the wire, which can better fit the internal space of the housing frame and prevent water seepage.
[0036] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A mold for injection molding without parting lines, characterized in that, include: A first mold and a second mold that are matched with each other, wherein the first mold can be closed with the second mold to form a product body molding cavity; At least one third mold, the third mold having a boss forming cavity, the boss forming cavity being directly connected to the product body forming cavity, wherein the maximum radial cross-sectional area of the boss forming cavity is greater than the radial cross-sectional area of the product body forming cavity.
2. The mold for injection molding without parting lines according to claim 1, characterized in that, The product body forming cavity includes at least two product body forming cavity segments spaced apart along its own axial direction, and the third mold is disposed between two adjacent product body forming cavity segments.
3. The mold for injection molding without parting lines according to claim 1, characterized in that, The inner diameter of the boss forming cavity gradually decreases from one end to the other.
4. The mold for injection molding without parting lines according to claim 1, characterized in that, The second mold and the first mold are provided with insertion slots. When the first mold and the second mold are closed to form the main body forming cavity of the product, the two ends of the third mold along the radial direction of the boss forming cavity are respectively inserted into the insertion slots.
5. The mold for injection molding without parting lines according to claim 2, characterized in that, The first mold and the second mold are respectively provided with a first tail forming strip and a second tail forming strip. The first tail forming strip can close with the second tail forming strip to form a product step forming cavity. The product step forming cavity is located between the product body forming cavity and the boss forming cavity.
6. The mold for injection molding without parting lines according to claim 5, characterized in that, The first mold and the second mold are respectively provided with a third tail forming strip and a fourth tail forming strip. The third tail forming strip and the fourth tail forming strip can be molded together to form at least a part of the main body forming cavity of the product. The third tail forming strip and the fourth tail forming strip are closely connected to the first tail forming strip and the second tail forming strip along the axial direction of the main body forming cavity of the product.
7. A processing apparatus for injection-molded products without parting lines, characterized in that, The invention includes a mold for injection molding without parting lines as described in any one of claims 1-6, and at least one pressure mechanism connected to at least one of the first mold and the second mold, and used to drive the first mold and the second mold to switch between a closed state and a closed state.
8. The processing apparatus for injection molding products without parting lines according to claim 7, characterized in that, The first mold is provided with a guide rod, and the second mold is provided with a first guide hole. When the first mold and the second mold are switched to the closed state, the guide rod is inserted into the first guide hole.
9. The processing apparatus for injection-molded products without parting lines according to claim 7, characterized in that, The processing device for injection molding of products without parting lines also includes a lifting mechanism, which is used to lift the third mold so that the boss forming cavity and the product body forming cavity are disconnected from each other.
10. The processing apparatus for injection-molded products without parting lines according to claim 9, characterized in that, The lifting mechanism includes a lifting plate, a lifting rod, and a return spring. The lifting rod is disposed on the lifting plate, and the lifting plate is used to drive the lifting rod to lift the third mold. The return spring is disposed on the lifting rod, and the return spring is used to reset the lifting plate after the lifting rod lifts the third mold.
11. The processing apparatus for injection-molded products without parting lines according to claim 10, characterized in that, An ejector guide plate is provided between the lifting mechanism and the second mold. The ejector guide plate has a second guide hole. When the lifting plate is used to drive the lifting rod to lift the third mold, the lifting rod is inserted into the second guide hole.