CN216343305U - Pre-embedded nut for injection molding of ladle - Google Patents
Pre-embedded nut for injection molding of ladle Download PDFInfo
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- CN216343305U CN216343305U CN202122583178.1U CN202122583178U CN216343305U CN 216343305 U CN216343305 U CN 216343305U CN 202122583178 U CN202122583178 U CN 202122583178U CN 216343305 U CN216343305 U CN 216343305U
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Abstract
The utility model discloses an embedded nut for injection molding ladle, which comprises a threaded connecting part for locking and a positioning part for matching and positioning with a positioning core rod, wherein the threaded connecting part is axially provided with an internal thread through hole; the diameter of the internal thread through hole is larger than that of the positioning through hole, and the positioning core rod can be just inserted into the positioning through hole in a seamless mode. The embedded nut can solve the problem that the position accuracy of the nut in a product with the nut filling bag is not high, and can solve the problems that metal wire scraps are remained in the nut in the turning process and the processing cost is too high, so that the processing process cost and the material cost are reduced, and the product quality and the value after injection molding are promoted integrally.
Description
Technical Field
The utility model relates to a nut, in particular to an embedded nut for injection molding of a ladle, and belongs to the technical field of injection molding and machining of fasteners.
Background
Nut pre-embedding is a production process for embedding a nut into a plastic part, and the firmness of the metal nut as an embedded part is improved by coating the metal nut with a plastic mould. The nut pre-embedding molding is generally to embed a nut into an injection mold manually or by a pre-embedding mechanism and then perform an injection molding process of an injection molding piece.
The structure of the embedded nut used in the prior art is shown in the attached drawing 1 of the specification, the top of the threaded hole (i.e. the opposite side of the locking screw end) of the nut is a blind hole structure, and the most end part of the blind hole structure is a conical tip space.
In the pre-buried forming process of nut, can't carry out accurate location to the position after the pre-buried shaping of nut, this is because the nut of current common structure is at the irritate a packet in-process of moulding plastics, and the nut itself does not have the structural feature that can let the mould mold insert carry out accurate location, generally uses the interior system screw thread of nut or nut external diameter as its irritate a packet location benchmark of moulding plastics in the industry.
However, there are certain disadvantages and risks in positioning using the two methods described above:
when the internal thread of the conventional nut is used for positioning the nut, the positioning core rod needs to be inserted into the threaded hole for positioning, so that when the surface of the positioning core rod is in contact with the thread in the threaded hole, the thread is easily damaged secondarily in the injection molding and bag filling process; in order to avoid thread damage caused by contact, the positioning die workpiece needs to avoid threads during positioning, but the surface of the positioning core rod cannot contact with the surface of the inner end part of the hole after avoiding, and a certain gap is reserved (see the specification, shown in figure 2, wherein c is a gap), so that inaccurate positioning is caused; after the above factors are synthesized, the position accuracy after the conventional nut is used for injection molding and bag filling cannot meet the requirements of the industry.
When the outer diameter of the nut is used for positioning the nut, the nut usually needs to reserve a sufficient distance exposed out of the surface of the plastic resin, and the distance is generally not less than 2mm, so that the exposed part of the nut cannot be flush with the surface of the plastic resin, and the structure of part of the product is limited to the position; meanwhile, the nut section exposed on the surface of the plastic resin is a material waste area, so that the nut cannot be effectively utilized, and the effective utilization rate of the nut is reduced.
In addition, when turning is performed in the production process of the nut, the nut is usually formed into an outer shape, then drilled, and finally tapped to form a thread. When using prior art's conventional nut structure, the wire and the metal fillings that produce are attacked to tooth in this process extremely easily pile up in nut thread space point department, and extremely be difficult to carry out the thorough clearance of stopping formula from the space to various quality risks and the cost of nut in the use stage have been increased.
Based on above-mentioned industry technical field's bottleneck, need design one kind and can enough solve the quiet not high problem of accurate nut position in the product of taking the nut to irritate the package, can solve the nut again and remain the buried nut in advance of the difficult clearance problem of wire bits in the car processing.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides the embedded nut for the injection molding pouring bag, which can solve the problem of low nut position accuracy in a product with the nut pouring bag and also solve the problems of residual metal wire scraps of the nut in turning and overhigh processing cost.
The technical scheme of the utility model is as follows:
an embedded nut for injection molding of a ladle comprises a threaded connecting part for locking and a positioning part for matching and positioning with a positioning core rod, wherein an internal thread through hole is formed in the threaded connecting part along the axial direction, a positioning through hole coaxial with the internal thread through hole is formed in the positioning part along the axial direction, and the positioning through hole is communicated with the internal thread through hole and penetrates through two ends of the embedded nut; the diameter of the internal thread through hole is larger than that of the positioning through hole, and the positioning core rod can be just inserted into the positioning through hole in a seamless mode.
The further technical scheme is as follows:
a transition part is formed between the threaded connection part and the positioning part, a transition through hole which is coaxial and communicated with the internal thread through hole and the positioning through hole is formed in the transition part, the diameter of the transition through hole is larger than that of the positioning through hole, and the diameter of the transition through hole is smaller than that of the internal thread through hole.
The further technical scheme is as follows:
the threaded connection part, the positioning part and the transition part are of an integrally formed structure.
The further technical scheme is as follows:
and in a positioning state, the clearance between the inner diameter of the positioning through hole and the outer diameter of the positioning core rod is not more than 0.02 mm.
The further technical scheme is as follows:
and the outer peripheral surface of the joint of the threaded connecting part and the transition part is radially inwards contracted to form a first positioning groove.
The further technical scheme is as follows:
the outer peripheral surface of the joint of the transition part and the positioning part is radially retracted inwards to form a second positioning groove.
The further technical scheme is as follows:
the outer peripheral surface of the threaded connection part is provided with a plurality of first longitudinal ribs which are arranged along the axial direction, and the cross section of each first longitudinal rib is triangular.
The further technical scheme is as follows:
the outer peripheral surface of the transition part is provided with a plurality of second longitudinal ribs which are arranged along the axial direction, and the cross section of each second longitudinal rib is triangular.
The beneficial technical effects of the utility model are as follows: the embedded nut changes a blind hole on a positioning part in the traditional structure into a positioning through hole communicated with an internal thread through hole, and the positioning core rod can be just inserted into the positioning through hole in a seamless manner, so that when the positioning core rod is used for positioning the embedded nut, the problem of inaccurate positioning caused by overlarge gap between the outer surface of the positioning core rod and the inner surface of a positioning hole of the embedded nut can be avoided; meanwhile, the diameter of the positioning through hole is smaller than that of the internal thread through hole, so that the situation that the positioning core rod is damaged due to the fact that the positioning core rod touches thread threads due to impact of injection molding materials when the positioning core rod is inserted into the hole can be avoided; in addition, the through hole structure runs through whole embedded nut, and after the threading is made in the car processing tapping, can thoroughly clear up remaining silk bits through modes such as blowing or washing. The structural design of the nut can solve the problem that the position of the nut in a product with the nut filling bag is quiet and not high, solve the problem that metal wire scraps remained in the nut in turning are not easy to clean, reduce the processing process cost and the material cost, and promote the quality and the value of the product after injection molding on the whole.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of an embedded nut in the prior art;
FIG. 2 is a schematic cross-sectional view of a pre-embedded nut and a positioning core rod in the prior art;
FIG. 3 is a schematic cross-sectional view of the pre-buried nut of the present invention;
FIG. 4 is a schematic perspective view of the pre-buried nut of the present invention;
FIG. 5 is a schematic cross-sectional view of the pre-embedded nut and the positioning core rod of the present invention;
FIG. 6 is a schematic cross-sectional three-dimensional structure of a prior art nut and a nut of the present invention embedded in a plastic part and coupled with a positioning core rod; wherein the left side is the condition of the prior art and the right side is the condition of the application;
wherein:
1. a threaded connection; 11. an internally threaded through bore; 12. a first longitudinal rib;
2. a positioning part; 21. positioning the through hole;
3. a transition section; 31. a transition through hole; 32. a second longitudinal rib;
4. positioning the core rod;
5. a first positioning groove;
6. a second positioning groove;
7. a plastic component.
Detailed Description
In order to make the technical means of the present invention clearer and to make the technical means of the present invention capable of being implemented according to the content of the specification, the following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples, which are provided for illustrating the present invention and are not intended to limit the scope of the present invention.
This particular embodiment has recorded in detail an injection moulding irritates package and uses embedded nut.
The embedded nut comprises a threaded connection part 1 and a positioning part 2, wherein the threaded connection part 1 is used for being locked with a screw, and the positioning part 2 is used for being matched and positioned with a positioning core rod 4 on an injection mold.
The threaded connection part 1 is provided with an internal thread through hole 11 along the axial direction, and the inner peripheral side wall of the internal thread through hole 11 is provided with an internal thread; a positioning through hole 21 coaxial with the internal thread through hole 11 is axially formed in the positioning part 2, and the inner peripheral side wall of the positioning through hole is a smooth surface; the positioning part 21 is communicated with the internal thread through hole 11 and penetrates through two ends of the embedded nut, so that the two through holes are combined to form a through hole penetrating through the embedded nut along the axial direction. In the above-described through hole, the diameter f of the female screw through hole 11 is larger than the diameter e of the positioning through hole 21, and the diameter of the female screw through hole described in the present application means a small diameter of the female screw, that is, a diameter value of the female screw closest to the axial center. The positioning core rod 4 can be just inserted into the positioning through hole 21 in a seamless manner, and in the application, when the positioning core rod is inserted into the positioning through hole, the outer surface of the positioning core rod and the inner surface of the positioning through hole are almost attached together, so that the positioning core rod can be freely inserted and pulled. Preferably, when the positioning core rod is inserted into the positioning through hole and is in a positioning state, the clearance between the inner diameter of the positioning through hole 21 and the outer diameter of the positioning core rod 4 is not more than 0.02 mm.
Specifically, a transition part 3 is further formed between the threaded connection part 1 and the positioning part 2, and the threaded connection part 1, the positioning part 2 and the transition part 3 are of an integrally formed structure. The transition part 3 is formed with a transition through hole 31 which is coaxial and communicated with the internal thread through hole and the positioning through hole, the diameter of the transition through hole 31 is larger than that of the positioning through hole 21, and the diameter of the transition through hole 31 is smaller than that of the internal thread through hole 11.
The outer diameters of the threaded connecting part 1 and the transition part 3 are consistent, and a first annular positioning groove 5 is formed on the outer peripheral surface of the joint of the threaded connecting part and the transition part by radially shrinking inwards; the outer diameter of the positioning part 2 is smaller than that of the transition part 3, and the outer peripheral surface of the joint of the transition part 3 and the positioning part 2 is radially inwards contracted to form a second positioning groove 6 in an annular shape. Above-mentioned first positioning groove and second positioning groove can only set up one, also can both set up simultaneously, also can set up a plurality ofly according to whole embedded nut's length interval, set up in this embodiment two can. The annular positioning groove can be set to position and stop in the axial direction when the embedded nut is positioned in the plastic part.
In addition, a plurality of first longitudinal ribs 12 which are arranged along the axial direction are formed on the outer peripheral surface of the threaded connection part 1, and the cross sections of the first longitudinal ribs are triangular; the outer peripheral surface of the transition part 3 is formed with a plurality of second longitudinal ribs 32 which are arranged along the axial direction, and the cross section of the second longitudinal ribs is triangular. Above-mentioned first vertical bead and the vertical bead of second can set up simultaneously, also can set up alone to when guaranteeing that buried nut inlays to locate the plastic part, can realize the location card on the circumferential direction and stop suitable. In the present embodiment, the outer peripheral surface of the positioning portion 2 is a smooth surface, and based on the positioning and locking in the axial and circumferential directions, circumferential and axial locking structures, such as corresponding grooves and ribs, may be correspondingly arranged on the outer peripheral surface.
The embedded nut changes a blind hole on a positioning part in the traditional structure into a positioning through hole communicated with an internal thread through hole, and the positioning core rod can be just inserted into the positioning through hole in a seamless manner, so that when the positioning core rod is used for positioning the embedded nut, the problem of inaccurate positioning caused by overlarge gap between the outer surface of the positioning core rod and the inner surface of a positioning hole of the embedded nut can be avoided; meanwhile, the diameter of the positioning through hole is smaller than that of the internal thread through hole, so that the situation that the positioning core rod is damaged due to the fact that the positioning core rod touches thread threads due to impact of injection molding materials when the positioning core rod is inserted into the hole can be avoided; in addition, the through hole structure runs through whole embedded nut, and after the threading is made in the car processing tapping, can thoroughly clear up remaining silk bits through modes such as blowing or washing. The structural design of the nut can solve the problem that the position of the nut in a product with the nut filling bag is quiet and not high, solve the problem that metal wire scraps remained in the nut in turning are not easy to clean, reduce the processing process cost and the material cost, and promote the quality and the value of the product after injection molding on the whole.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides an injection moulding irritates package and uses embedded nut which characterized in that: the nut positioning device comprises a threaded connecting part (1) for locking and a positioning part (2) for matching and positioning with a positioning core rod (4), wherein the threaded connecting part (1) is axially provided with an internal thread through hole (11), the positioning part (2) is axially provided with a positioning through hole (21) coaxial with the internal thread through hole (11), and the positioning through hole is communicated with the internal thread through hole and penetrates through two ends of a pre-buried nut; the diameter of the internal thread through hole (11) is larger than that of the positioning through hole (21), and the positioning core rod (4) can be just inserted into the positioning through hole (21) in a seamless mode.
2. The injection molding is irritated and is used buried nut in advance of package according to claim 1, characterized in that: a transition part (3) is formed between the threaded connection part (1) and the positioning part (2), a transition through hole (31) which is coaxial and communicated with the internal thread through hole and the positioning through hole is formed in the transition part, the diameter of the transition through hole (31) is larger than that of the positioning through hole (21), and the diameter of the transition through hole (31) is smaller than that of the internal thread through hole (11).
3. The embedded nut for injection molding pouring ladle according to claim 2, characterized in that: the threaded connection part (1), the positioning part (2) and the transition part (3) are of an integrally formed structure.
4. The injection molding is irritated and is used buried nut in advance of package according to claim 1, characterized in that: in a positioning state, the clearance between the inner diameter of the positioning through hole (21) and the outer diameter of the positioning core rod (4) is not more than 0.02 mm.
5. The embedded nut for injection molding pouring ladle according to claim 2, characterized in that: and a first positioning groove (5) is formed on the outer peripheral surface of the joint of the threaded connecting part (1) and the transition part (3) in a radially inward contracting mode.
6. The embedded nut for injection molding pouring ladle according to claim 2, characterized in that: the outer peripheral surface of the joint of the transition part (3) and the positioning part (2) contracts inwards along the radial direction to form a second positioning groove (6).
7. The injection molding is irritated and is used buried nut in advance of package according to claim 1, characterized in that: the outer peripheral surface of the threaded connection part (1) is provided with a plurality of first longitudinal ribs (12) which are arranged along the axial direction, and the cross section of each first longitudinal rib is triangular.
8. The embedded nut for injection molding pouring ladle according to claim 2, characterized in that: the outer peripheral surface of the transition part (3) is provided with a plurality of second longitudinal ribs (32) which are arranged along the axial direction, and the cross section of each second longitudinal rib is triangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122583178.1U CN216343305U (en) | 2021-10-26 | 2021-10-26 | Pre-embedded nut for injection molding of ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122583178.1U CN216343305U (en) | 2021-10-26 | 2021-10-26 | Pre-embedded nut for injection molding of ladle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216343305U true CN216343305U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122583178.1U Active CN216343305U (en) | 2021-10-26 | 2021-10-26 | Pre-embedded nut for injection molding of ladle |
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| Country | Link |
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| CN (1) | CN216343305U (en) |
Cited By (2)
| 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 |
| CN116456653A (en) * | 2023-04-24 | 2023-07-18 | 苏州鑫捷顺精密科技股份有限公司 | Electronic device cover plate with embedded screw sleeve |
-
2021
- 2021-10-26 CN CN202122583178.1U patent/CN216343305U/en active Active
Cited By (3)
| 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 |
| CN116456653A (en) * | 2023-04-24 | 2023-07-18 | 苏州鑫捷顺精密科技股份有限公司 | Electronic device cover plate with embedded screw sleeve |
| CN116456653B (en) * | 2023-04-24 | 2023-10-24 | 苏州鑫捷顺精密科技股份有限公司 | Electronic device cover plate with embedded screw sleeve |
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