A blind hole nut implantation mold
By setting up a support part and an interference part at the master mold positioning needle of the blind hole nut implanted into the mold, the problem of the blind hole nut floating in the air during the injection molding process is solved, and stable molding and high-quality production of the product are achieved.
Patent Information
- Application Number
- CN202420477185.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-03-12
AI Technical Summary
When producing products such as wall-mounted radomes, blind hole nuts cannot be positioned with male and female molds, which leads to the influence of injection molding force in the suspended state during the injection molding process, which is prone to floating up and down, resulting in problems of overflowing glue and poor molding.
A blind hole nut implant mold is designed. By providing a support and an interference part at the positioning needle of the mother mold, the support and the interference part are cooperated to tighten the blind hole nut outward, so that it is suspended and fixed in the injection molding cavity to avoid floating.
It effectively reduces the occurrence of overflow, improves the yield of production molding, and allows the blind hole nut to be stably fixed during injection molding to ensure the quality of the product.
Smart Images
Figure CN222712662U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of implant injection molding, in particular to a blind hole nut implantation mold. Background Art
[0002] Wall-mounted radome base stations are usually used to install wireless communication equipment, such as base station antennas, signal amplifiers, etc., on the exterior walls of buildings or other supports. This design can effectively save space, improve signal coverage, and does not occupy ground space.
[0003] Wall-mounted products are similar to the nuts on the back of a TV or a router on the wall. In the processing of wall-mounted products, especially when it is necessary to add nuts to the product, due to the insufficient bonding force of traditional hot-melt nuts, implanted nuts are generally produced by injection molding. However, for products with waterproof requirements, implanted nuts are usually not through-hole type, but blind hole nuts are selected. However, when the blind hole nuts cannot be molded and positioned with the male and female molds in the mold, the blind hole bolts are in a suspended state. When the blind hole bolts are sealed in the mold, the injection force generated will act on the suspended blind hole bolts, which can easily cause the blind hole bolts to float up and down, resulting in the top surface of the injection-molded product and the top surface of the blind hole bolts not being in the same plane, resulting in overflow of glue and forming defective products. Utility Model Content
[0004] The utility model aims to provide a blind hole nut implanting die to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a blind hole nut implantation mold, suitable for nuts, wherein the nut is a blind hole nut, comprising: a female mold and a male mold, an injection cavity is formed between the female mold and the male mold, the nut is suspended in the injection cavity, the female mold is slidably connected with a positioning needle, a notch is provided at the needle head of the positioning needle, support parts are formed on both sides of the notch, the support part is provided with an interference part, and the support part and the interference part cooperate to tighten the nut outward.
[0006] Preferably, a contact surface is provided between the female mold and the male mold.
[0007] Preferably, the notch is a groove-like structure that penetrates from front to back.
[0008] Preferably, the top of the nut is in contact with the female mold.
[0009] Preferably, the bottom of the nut has no contact with the male mold.
[0010] Preferably, the interference portion is arranged on the arc-shaped outer surface of the support portion.
[0011] Preferably, the interference amount of the interference part is 0.04 mm.
[0012] The blind hole nut implantation mold has the following beneficial effects:
[0013] The blind hole nut is implanted in the mold, and a supporting part and an interference part are arranged at the needle head of the positioning pin. The supporting part and the interference part cooperate to tighten the blind hole nut outward, so that the blind hole nut can be suspended and fixed in the injection cavity and is difficult to move when it cannot be positioned with the male and female molds, thereby reducing the occurrence of glue overflow and greatly improving the production molding yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A three-dimensional diagram of a blind hole nut implantation mold provided in an embodiment of the present application;
[0015] Figure 2 An exploded view of a blind hole nut implantation mold provided in an embodiment of the present application;
[0016] Figure 3 A cross-sectional view of a blind hole nut implantation mold provided in an embodiment of the present application;
[0017] Figure 4 for Figure 3 The enlarged view of point A in the middle;
[0018] Figure 5 for Figure 2 Schematic diagram of the positioning needle;
[0019] Figure 6 It is a schematic diagram of the nut forming structure after the through-hole nut is positioned and sealed by the male and female molds in the prior art;
[0020] Figure 7 It is a schematic diagram of the nut forming structure of the blind hole nut after the male and female molds are molded and positioned and sealed with glue in the prior art;
[0021] Figure 8 The present invention is a schematic diagram of the nut forming structure of the blind hole nut in the prior art after the male and female molds are not molded, positioned and sealed with glue.
[0022] In the figure: 1. female mold; 2. male mold; 3. contact surface; 4. positioning pin; 41. notch; 42. supporting part; 43. interference part; 5. nut; 6. product. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] like Figure 1-Figure 4 As shown, the utility model provides an embodiment of a blind hole nut implantation mold, which is suitable for a nut 5, wherein the nut 5 is a blind hole nut. The blind hole nut implantation mold comprises: a female mold 1 and a male mold 2, wherein a contact surface 3 is arranged between the female mold 1 and the male mold 2, and an injection cavity is formed between the female mold 1 and the male mold 2, wherein the nut 5 is suspended in the injection cavity. Specifically, the top of the nut 5 is in contact with the female mold 1, and the bottom of the nut 5 is not in contact with the male mold 2. Plastic is injected into the injection cavity, and the plastic fills the entire injection cavity and seals the nut, and then solidifies and forms a product 6.
[0025] Specifically, Figure 2-Figure 5 As shown, the mother mold 1 is slidably connected with a positioning needle 4, and a notch 41 is provided at the needle head of the positioning needle 4. The notch 41 is a groove-like structure that passes through the front and back. Support parts 42 are formed on both sides of the notch 41. The notch 41 provides a deformation space for the deformation of the support part 42. An interference part 43 is provided on the arc-shaped outer surface of the support part 42. The interference amount of the interference part 43 is 0.04mm. The support part 42 and the interference part 43 cooperate to tighten the nut 5 outward.
[0026] In this embodiment, the female mold 1 and the male mold 2 are first fitted together, and the unfitted space in the middle forms an injection cavity. The positioning pin 4 is then passed through the female mold 1 until the needle head enters the injection cavity. The blind hole nut is sleeved on the outside of the needle head so that the blind hole nut is suspended in the injection cavity, but the top of the blind hole nut is in contact with the female mold 1. When sleeved, the support parts 42 on both sides of the notch 41 are deformed inwardly until the support parts 42 are completely immersed in the blind hole nut, and the interference part 43 is in contact with the inner wall of the blind hole nut. Due to the outward tension of the support part 42, under the action of the tension, the interference part 43 is tightly attached to the inner wall of the blind hole nut, so that the blind hole nut can be suspended and fixed in the injection cavity and is difficult to move when it cannot be molded and positioned with the male mold 2 and the female mold 1. Then, injection molding glue is injected into the injection cavity, and the injection molding glue fills the entire injection cavity and seals the nut. After solidification and molding, a product 6 is formed. Finally, the positioning pin 4, the female mold 1 and the male mold 2 are removed.
[0027] It is understandable that the blind hole nut is suspended and fixed in the injection molding cavity during the sealing process, and is not prone to floating up and down, thereby reducing the occurrence of glue overflow and greatly improving the production molding yield.
[0028] The inventors found that if Figure 6As shown, in the existing implant nut injection molding process, if the nut 5 adopts a through hole nut (the through hole nut is threadedly connected to the needle head of the positioning needle 4), the top and bottom of the through hole nut are respectively in contact with the female mold 1 and the male mold 2, so that the through hole nut can be positioned by the male and female molds and then sealed with glue. However, the nut 5 in the present application is a blind hole nut and cannot be implanted by injection molding through this process.
[0029] like Figure 7 As shown, if the nut 5 is a blind hole nut, in the existing implant nut injection molding process (the blind hole nut is threadedly connected to the needle head of the positioning needle 4), the top and bottom of the blind hole nut are respectively in contact with the female mold 1 and the male mold 2, and the blind hole nut can still be positioned by combining the male and female molds and then sealed with glue, but the blind hole nut will be exposed at the bottom of the molded product 6, which is not suitable for product 6 whose bottom needs to be closed. The mold of the present application can be suitable for product 6 whose bottom needs to be closed.
[0030] like Figure 8 As shown, when it is necessary to implant a blind hole nut into the injection molding to produce a product 6 whose bottom needs to be closed, the existing implanted nut injection molding process is adopted (the blind hole nut is threadedly connected to the needle head of the positioning needle 4), then the nut 5 will inevitably be suspended in the injection molding cavity. When the injection molding glue is injected into the injection molding cavity, the force generated by the injection molding will act on the suspended blind hole bolt, which is easy to push the blind hole bolt to rotate on the needle head, causing the blind hole bolt to float up and down, making it impossible for the blind hole nut to be positioned by the male and female molds, and the floating will cause a gap between the top of the blind hole bolt and the female mold 1. The injection molding glue entering the gap will cause the top surface of the injection molded product 6 and the top surface of the blind hole bolt to be not in the same plane, resulting in overflow of glue. The mold of the present application adopts a structure in which the notch 41, the support portion 42 and the interference portion 43 cooperate, which can fix the suspended position of the blind hole bolt and is not easily affected by the force generated by injection molding, thereby effectively avoiding the occurrence of overflow of glue.
[0031] Working principle: first fit the female mold 1 and the male mold 2 together, then pass the positioning needle 4 through the female mold 1 until the needle tip enters the injection cavity, and then sleeve the blind hole nut on the outside of the needle tip so that the blind hole nut is suspended in the injection cavity, but the top of the blind hole nut is in contact with the female mold 1. When sleeved, the support parts 42 on both sides of the notch 41 are deformed inward until the support parts 42 are completely immersed in the blind hole nut, and the interference part 43 is close to the inner wall of the blind hole nut, so that the blind hole nut can be suspended and fixed in the injection cavity and is difficult to move when it cannot be positioned with the male mold 2 and the female mold 1. Then, injection molding glue is injected into the injection cavity, and the injection molding glue fills the entire injection cavity and seals the nut. After solidification and molding, product 6 is formed.
[0032] In summary, although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A blind hole nut implantation mold, suitable for a nut (5), wherein the nut (5) is a blind hole nut, characterized in that: include: A female mold (1) and a male mold (2), wherein an injection molding cavity is formed between the female mold (1) and the male mold (2), and the nut (5) is suspended in the injection molding cavity; The female mold (1) is slidably connected to a positioning needle (4), a notch (41) is provided at the needle head of the positioning needle (4), support portions (42) are formed on both sides of the notch (41), and an interference portion (43) is provided on the support portion (42). The support portion (42) cooperates with the interference portion (43) to tighten the nut (5) outward.
2. A blind hole nut implantation mold according to claim 1, characterized in that: A contact surface (3) is provided between the female mold (1) and the male mold (2).
3. A blind hole nut implantation mold according to claim 1, characterized in that: The notch (41) is a groove-shaped structure that penetrates from front to back.
4. A blind hole nut implantation mold according to claim 1, characterized in that: The top of the nut (5) is in contact with the female mold (1).
5. The blind hole nut implanting mold according to claim 1, characterized in that: The bottom of the nut (5) has no contact with the male mold (2).
6. A blind hole nut implantation mold according to claim 1, characterized in that: The interference portion (43) is arranged on the arc-shaped outer surface of the support portion (42).
7. A blind hole nut implantation mold according to claim 6, characterized in that: The interference amount of the interference portion (43) is 0.04 mm.