CN216519110U - Injection molding structure of embedded metal nut - Google Patents
Injection molding structure of embedded metal nut Download PDFInfo
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- CN216519110U CN216519110U CN202123302406.XU CN202123302406U CN216519110U CN 216519110 U CN216519110 U CN 216519110U CN 202123302406 U CN202123302406 U CN 202123302406U CN 216519110 U CN216519110 U CN 216519110U
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- metal nut
- nut
- injection molding
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- annular flange
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Abstract
The utility model discloses an injection molding part structure embedded with a metal nut, which comprises an injection molding part and the metal nut injected in the injection molding part, wherein the metal nut is provided with a central through hole, and the lower end of the inner wall of the central through hole is provided with an annular flange protruding towards the axis of the central through hole; the top surface of the injection molding part is provided with a nut groove, the center of the bottom wall of the nut groove is provided with a boss, the boss is matched with the inner hole of the annular flange, and the top surface of the annular flange and the bottom surface of the insert inserted into the internal thread part form an injection molding glue surface. According to the utility model, the lower end of the inner wall of the central through hole of the metal nut is provided with the annular flange, the top surface of the annular flange is tightly pressed and attached with the bottom surface of the insert inserted into the internal thread part to form the injection molding glue surface, so that the problem that glue overflows to fill the threads due to the fact that plastic enters the internal thread hole through the lower end of the central through hole of the metal nut in the injection molding process is avoided, and the connection strength of the metal nut is ensured.
Description
Technical Field
The utility model relates to the technical field of injection molding parts, in particular to an injection molding part structure with an embedded metal nut.
Background
In order to improve the connection strength with other components, many plastic products are usually embedded with a metal nut, and the metal nut is injection molded to form a beer nut set structure, so as to realize connection with other components. In the injection molding mode of the sleeve beer nut of the existing plastic product, when the metal nut is injected in a mold, plastic is easily poured into the threads of the metal nut, so that the number of effective thread turns of the sleeve beer nut is reduced, the locking is not completed, and the problem of poor connection performance is caused.
In view of this, it is necessary to improve the structure of the existing injection molding part with the inner nested beer nut, so as to avoid that the connection performance is affected by the overflowing glue filling thread when the metal nut is injected.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide an injection molding structure with a metal nut embedded therein, so as to solve the problem of poor connection performance caused by the fact that plastic is easily poured into the thread of the metal nut in the prior art.
Therefore, the injection molding part structure with the embedded metal nut comprises the injection molding part and the metal nut which is injected in the injection molding part,
the metal nut is provided with a central through hole, the lower end of the inner wall of the central through hole is provided with an annular flange protruding towards the axle center of the central through hole, and the part of the central through hole above the annular flange is an internal thread part;
the injection molding piece is characterized in that a nut groove is formed in the top surface of the injection molding piece and matched with the shape of the metal nut, a boss is arranged at the center of the bottom wall of the nut groove and matched with the inner hole of the annular flange, and the top surface of the annular flange and the bottom surface of the insert inserted into the inner threaded part form an injection molding glue surface.
In the above technical solution, preferably, the outer end surface of the metal nut is flush with the outer surface of the injection molded part.
In the above technical solution, preferably, the height of the boss is equal to the thickness of the annular flange.
In the above technical solution, preferably, a diameter of the boss is smaller than an inner diameter of the metal nut.
In the above technical solution, preferably, the metal nut is a cylindrical nut or a hexagonal nut.
In the above technical solution, preferably, a plurality of process holes are provided on a bottom wall of the nut groove, and an ejector pin of the injection mold supports an inner end surface of the metal nut.
In the above technical solution, preferably, the process holes are uniformly distributed along the circumference of the metal nut, and are configured to be 2 or 3.
In the above technical solution, preferably, an annular groove is further provided on an inner wall of the central through hole, and the annular groove is located above the annular flange and is connected to the annular flange.
According to the technical scheme, the injection molding part structure with the embedded metal nut solves the problem that plastic in the prior art is easy to fill into the threads of the metal nut, so that the connection performance is poor. Compared with the prior art, the utility model has the following beneficial effects:
the inner wall lower extreme of metal nut's central through-hole is equipped with annular flange, and the top surface of annular flange sticiss the laminating with the bottom surface of the mold insert that inserts the internal thread portion and form the plastic injection molding face of gluing, has avoided at the in-process of moulding plastics, and the plastic gets into the internal thread hole via the lower extreme of metal nut's central through-hole, causes the problem of excessive gluey filling thread, has guaranteed metal nut's joint strength.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic structural diagram of a structure of an injection-molded part with a metal nut embedded therein, provided by the utility model;
FIG. 2 is an exploded view of the structure of the injection molded part with the metal nut embedded therein according to the present invention;
FIG. 3 is a schematic structural view of a metal nut according to the present invention;
FIG. 4 is a top view of a structure of an injection molded part with a metal nut embedded therein according to the present invention;
fig. 5 is a sectional view taken along line a-a of fig. 4 with an insert added.
In fig. 1 to 5, the correspondence between the components is as follows:
the injection molding part 10, the metal nut 20 and the insert 30;
a central through hole 21, an annular flange 22, an annular groove 23, an internal threaded portion 24;
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.
It should be noted that the terms of orientation such as "inside, outside", "front, back" and "left and right" are used herein as reference objects, and it is obvious that the use of the corresponding terms of orientation does not limit the scope of protection of the present invention.
As shown in fig. 1 and fig. 2, the injection molded part structure with the embedded metal nut provided by the utility model comprises an injection molded part 10 and a metal nut 20 injected into the injection molded part 10, thereby forming a sleeve nut structure, wherein the outer end surface of the metal nut 20 is flush with the outer surface of the injection molded part 10.
As shown in fig. 3, the metal nut 20 has a central through hole 21, an annular flange 22 protruding toward the axis of the central through hole 21 is provided at the lower end of the inner wall of the central through hole 21, an annular groove 23 is further provided on the inner wall of the central through hole 21, the annular groove 23 is located above the annular flange 22 and is connected to the annular flange 22, and the portion of the central through hole 21 located above the annular groove 23 is an internal threaded portion 24.
As shown in fig. 2, 4 and 5, a nut groove 11 is formed on the top surface of the injection molded part 10, the nut groove 11 is adapted to the shape of the metal nut 20, a boss 12 is formed at the center of the bottom wall of the nut groove 11, the boss 12 is adapted to the inner hole of the annular flange 22, the height of the boss 12 is equal to the thickness of the annular flange 22, and the diameter of the boss 12 is smaller than the inner diameter of the metal nut 20. The top surface of the boss 12 and the bottom surface of the insert 30 inserted into the internal thread portion 24 form an injection molding rubber surface. The boss 12 is formed by injection molding. The insert 30 fits into the internal bore of the threaded portion.
In the present embodiment, the metal nut 20 may be a cylindrical nut or a six-nut.
In addition, a plurality of process holes 13 are formed in the bottom wall of the nut groove 11, and are used for supporting the inner end surface of the metal nut 20 by an ejector pin of an injection mold. In this embodiment, the process holes 13 are uniformly distributed along the circumference of the metal nut 20, and are configured to be 2 or 3.
During injection molding, the insert 30 is firstly placed into the metal nut 20, the lower end of the insert 30 is tightly pressed against the top surface of the annular flange 22, then the insert 30 and the metal nut 20 are placed into an injection mold together for injection molding, and the insert 30 is screwed out after the injection molding is finished. Because the bottom surface of the metal nut 20 forms the sealing surface, during the injection molding process, the plastic cannot enter the interior of the metal nut 20 through the lower end of the central through hole of the metal nut 20, and the overflowing glue cannot enter the internal thread part.
With the above description of the specific embodiment, compared with the prior art, the injection molding part structure with the embedded metal nut provided by the utility model has the following advantages:
first, the inner wall lower extreme of metal nut's central through-hole is equipped with the annular flange, and the top surface of annular flange sticiss the laminating with the bottom surface of the mold insert of inserting internal thread portion and form the plastic injection molding face of gluing, has avoided at the in-process of moulding plastics, and the plastic gets into the internal thread hole via the lower extreme of metal nut's central through-hole, causes the problem of excessive gluey filling thread, has guaranteed metal nut's joint strength.
And secondly, an annular groove is further formed in the inner wall of the central through hole of the metal nut, is positioned above the annular flange and is connected with the annular flange, and even if the injection molding sealing glue surface is not tightly sealed and has a small amount of glue overflowing, the glue can enter the annular groove and cannot enter the internal thread part, so that the connection performance of the internal thread part is not influenced.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (8)
1. An injection molding part structure with embedded metal nuts, which comprises an injection molding part and metal nuts injected in the injection molding part, and is characterized in that,
the metal nut is provided with a central through hole, the lower end of the inner wall of the central through hole is provided with an annular flange protruding towards the axle center of the central through hole, and the part of the central through hole above the annular flange is an internal thread part;
the injection molding piece is characterized in that a nut groove is formed in the top surface of the injection molding piece and matched with the shape of the metal nut, a boss is arranged at the center of the bottom wall of the nut groove and matched with the inner hole of the annular flange, and the top surface of the annular flange and the bottom surface of the insert inserted into the inner threaded part form an injection molding glue surface.
2. The injection-molded part structure with an embedded metal nut as claimed in claim 1, wherein the outer end face of the metal nut is flush with the outer surface of the injection-molded part.
3. The injection molded part structure of an embedded metal nut as claimed in claim 1, wherein the height of said boss is equal to the thickness of said annular flange.
4. The injection molded part structure of an embedded metal nut as claimed in claim 1, wherein the boss has a diameter smaller than an inner diameter of the metal nut.
5. The injection-molded part structure with an embedded metal nut as claimed in claim 1, wherein the metal nut is a cylindrical nut or a hex nut.
6. The structure of an injection-molded part with an embedded metal nut as claimed in claim 1, wherein the bottom wall of the nut groove is provided with a plurality of fabrication holes, and a thimble for an injection mold supports the inner end surface of the metal nut.
7. The injection molding structure of embedded metal nut of claim 6, wherein the process holes are uniformly distributed along the circumference of the metal nut and are configured into 2 or 3.
8. The injection-molded part structure with an embedded metal nut as claimed in claim 1, wherein an annular groove is further formed on the inner wall of the central through hole, and the annular groove is located above the annular flange and connected with the annular flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123302406.XU CN216519110U (en) | 2021-12-24 | 2021-12-24 | Injection molding structure of embedded metal nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123302406.XU CN216519110U (en) | 2021-12-24 | 2021-12-24 | Injection molding structure of embedded metal nut |
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| Publication Number | Publication Date |
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| CN216519110U true CN216519110U (en) | 2022-05-13 |
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| CN202123302406.XU Active CN216519110U (en) | 2021-12-24 | 2021-12-24 | Injection molding structure of embedded metal nut |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986793A (en) * | 2022-05-31 | 2022-09-02 | 泰德兴精密电子（昆山）有限公司 | Nut penetration embedding injection molding process and forming mold thereof |
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2021
- 2021-12-24 CN CN202123302406.XU patent/CN216519110U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986793A (en) * | 2022-05-31 | 2022-09-02 | 泰德兴精密电子（昆山）有限公司 | Nut penetration embedding injection molding process and forming mold thereof |
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