CN217434853U

CN217434853U - Nut location structure and injection mold structure of moulding plastics in mould

Info

Publication number: CN217434853U
Application number: CN202220472866.2U
Authority: CN
Inventors: 刘兆奇
Original assignee: Guangdong Blu Ray Intelligent Technology Co ltd
Current assignee: Guangdong Blu Ray Intelligent Technology Co ltd
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-09-16
Anticipated expiration: 2032-03-03

Abstract

The utility model relates to a nut location structure and injection mold structure mould plastics in mould. The structure comprises a positioning needle and an elastic sheet, wherein the upper part of the positioning needle is provided with an upward extending top column, the outer diameter of the top column is smaller than the aperture of a nut, and the top column is used for penetrating into an inner hole of the nut; the positioning needle is provided with a flat hole, the length direction of the side opening of the flat hole is parallel to the axial direction of the positioning needle, the flat hole is used for the penetration of the elastic sheet, the upper half part of the flat hole radially penetrates through the ejection column, and the lower half part of the flat hole radially penetrates through the positioning needle; the shell fragment divide into the base of lower part and the two mutual symmetry's on upper portion play the arm, and the base penetrates in the flat hole the latter half, and two play arms penetrate in the flat hole the upper half, and the lateral wall of two play arms all is equipped with the arc arch that surpasss outside the fore-set outer wall, and the maximum distance is greater than the aperture of nut hole between two arc archs. Through above structure, the nut all can embolia the fore-set smoothly on, and the nut can be effectively fixed on the pilot pin, avoids appearing the rubber coating, has improved the yields.

Description

Nut location structure and injection mold structure of moulding plastics in mould

Technical Field

The utility model relates to an accessory of moulding plastics, the more specifically nut location structure and injection mold structure mould moulding plastics in mould that says so.

Background

The injection molding is to heat and melt plastic (generally, pellets) in a cylinder of an injection molding machine, and when the plastic is in a fluid state, the molten plastic is compressed and moved forward under the pressure of a plunger or a screw, and then injected into a closed mold with a low temperature at a high speed through a nozzle at the front end of the cylinder, and after cooling and shaping for a certain period of time, the mold is opened to obtain a finished product.

During injection molding, the metal nut is often fixed at a set position, after injection molding is completed, a screw hole is formed in the position of the metal nut, and the metal nut and an injection molding part are integrated. In the prior art, a positioning needle is generally adopted to penetrate and fix a metal nut, but the size of the positioning needle is basically unchanged due to certain tolerance existing in the aperture of the nut, so that the positioning needle and the nut are too tightly matched sometimes, the friction resistance encountered when the nut is installed in the positioning needle is too large, the nut is not installed in place, and the nut is easily encapsulated; sometimes, the fit between the positioning pin and the nut is too loose, the nut is easy to be driven to move by the flowing of rubber during injection molding, and the nut is encapsulated by rubber to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's above defect, provide a nut location structure and injection mold structure mould plastics in mould to realize that the nut is effectively fixed at the pilot pin, avoid appearing the rubber coating.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an in-mold injection molding nut positioning structure comprises a positioning needle and an elastic sheet, wherein an upward extending top column is arranged at the upper part of the positioning needle, the outer diameter of the top column is smaller than the aperture of a nut, and the top column is used for penetrating into an inner hole of the nut; the positioning needle is provided with a flat hole, the length direction of the side opening of the flat hole is parallel to the axial direction of the positioning needle, the flat hole is used for the penetration of the elastic sheet, the upper half part of the flat hole radially penetrates through the ejection column, and the lower half part of the flat hole radially penetrates through the positioning needle; the shell fragment divide into the base of lower part and the two mutual symmetry's on upper portion play the arm, and the base penetrates in the flat hole the latter half, and two play arms penetrate in the flat hole the upper half, and the lateral wall of two play arms all is equipped with the arc arch that surpasss outside the fore-set outer wall, and the maximum distance is greater than the aperture of nut hole between two arc archs.

Furthermore, the elastic sheet and the flat hole are in gapless fit.

Further, the top pillar is coaxial with the positioning pin.

Furthermore, the outer side wall of the elastic arm is flush with the outer wall of the top column except for the other parts of the arc-shaped bulge, the outer side wall of the substrate of the elastic sheet is flush with the outer wall of the positioning needle, and the step surface of the joint of the substrate of the elastic sheet and the elastic arm is flush with the step surface of the joint of the positioning needle and the top column.

Further, the gap between the two elastic arms is a U-shaped groove, and the width of the U-shaped groove is gradually reduced from the direction from the substrate to the elastic arms.

Further, the U-shaped groove extends to the substrate.

Furthermore, the side walls of the elastic arms on the two sides of the U-shaped groove are inclined planes, and an acute angle formed by the side walls of the elastic arms and the axial direction of the positioning needle is 5 degrees.

Further, the spring plate is made of art blade steel.

The utility model also discloses an injection mold structure, it includes the nut location structure of moulding plastics in the above mould.

Compared with the prior art, the utility model beneficial effect be: through inserting the shell fragment in the pilot pin and play the arm and set up the arc arch outward, when the fore-set inserted the nut in, because play the arm and have elasticity, the nut can all embolia on the fore-set smoothly, and the arc arch of playing the arm blocks the nut moreover for the nut can not remove, therefore the nut can be effectively fixed on the pilot pin, avoids appearing the rubber coating, has improved the yields.

The foregoing is a summary of the present invention, and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments, which is provided for the purpose of illustration and understanding of the present invention.

Drawings

Fig. 1 is an exploded view of the positioning pin, spring plate and nut of the present invention.

Fig. 2 is an assembly view of the positioning pin with the spring plate installed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

The first embodiment is an in-mold injection molding nut positioning structure, and the specific structure of the in-mold injection molding nut positioning structure is shown in fig. 1 and 2.

As shown in fig. 1, the nut positioning structure of the first embodiment includes a positioning pin 10 and a resilient sheet 20. The upper part of the positioning needle 10 is provided with an upward extending top pillar 11, and the top pillar 11 and the positioning needle 10 are coaxial and are integrated. The outer diameter of the top column 11 is smaller than the bore diameter of the inner bore 31 of the nut 30. The top post 11 is adapted to pass into the internal bore 31 of the nut 30. The outer diameter of the top column 11 is smaller than the outer diameter of the body of the positioning needle 10. A step surface 111 is formed at the joint of the top pillar 11 and the positioning pin 10 body, and the step surface 111 is used for limiting the position of the nut 30. The positioning pin 10 is provided with a flat hole 12, and the flat hole 12 is used for the elastic sheet 20 to penetrate. The length direction of the side opening of the flat hole 12 is parallel to the axial direction 100 of the positioning needle 10. The upper half part 121 of the flat hole 12 radially penetrates through the top column 11, and the lower half part 122 of the flat hole 12 radially penetrates through the positioning needle 10.

As shown in fig. 1, the spring plate 20 is divided into a lower base plate 21 and an upper two symmetrical spring arms 22, the base plate 21 penetrates into the lower half 122 of the flat hole 12, and the two spring arms 22 penetrate into the upper half 121 of the flat hole 12. The outer side walls of the two elastic arms 22 are provided with arc-shaped protrusions 221 which exceed the outer wall of the top column 11, and the maximum distance between the two arc-shaped protrusions 221 is larger than the aperture of the inner hole 31 of the nut 30. As shown in fig. 2, after the elastic piece 20 is inserted into the flat hole 12 from the direction a, the outer side wall 223 of the elastic arm 22 is flush with the outer wall of the plunger 11 (to form a cylindrical shape) except for the arc-shaped protrusion 221, the outer side wall 211 of the substrate 21 of the elastic piece 20 is flush with the outer wall of the positioning pin 10 (to form a cylindrical shape), and the step surface 201 at the joint of the substrate 21 of the elastic piece 20 and the elastic arm 22 is flush with the step surface 111 at the joint of the positioning pin 10 and the plunger 11. After the assembly into the state of fig. 2, the nut 30 is sleeved into the top pillar 11 from the direction B, and the inner hole 31 of the nut 30 is clamped by the arc-shaped protrusion 221 of the elastic sheet 20, so that the nut is fixed.

In this embodiment, after the resilient plate 20 is inserted into the flat hole 12, there is no clearance between the resilient plate 20 and the flat hole 12, i.e. there is no clearance between the resilient plate 20 and the flat hole 12, so that molten plastic is prevented from flowing between the resilient plate 20 and the flat hole 12 during injection molding.

As shown in fig. 1, the gap between the two elastic arms 22 is a U-shaped groove 23. The width of the U-shaped groove 23 decreases gradually in the direction from the substrate 21 toward the elastic arm 22. U-shaped groove 23 extends to substrate 21. The side walls 222 of the elastic arms 22 on both sides of the U-shaped groove 23 are inclined planes, and the acute angle formed between the side walls 222 of the elastic arms 22 and the axial direction 100 of the positioning pin 10 is 5 degrees, so that the rigidity of the elastic arms 22 is not too high, and the nut 30 can be installed in the top column 11.

Further, the resilient plate 20 is made of art blade steel.

The utility model discloses an insert shell fragment 20 and play arm 22 and set up the protruding 221 of arc outward in pilot pin 10, when the fore-set 11 inserts in the nut 30, because play arm 22 has elasticity, on the fore-set 11 can all be emboliaed smoothly to nut 30, the protruding 221 of arc of playing arm 22 blocked nut 30 moreover for nut 30 can not remove, therefore nut 30 can be effectively fixed on pilot pin 10, avoids appearing the rubber coating, has improved the yields.

A second embodiment is an injection mold structure that includes the in-mold nut positioning structure of the first embodiment.

The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. An in-mold injection molding nut positioning structure is characterized by comprising a positioning needle and an elastic sheet, wherein an upward extending top column is arranged at the upper part of the positioning needle, the outer diameter of the top column is smaller than the aperture of a nut, and the top column is used for penetrating into an inner hole of the nut; the positioning needle is provided with a flat hole, the length direction of a side opening of the flat hole is parallel to the axial direction of the positioning needle, the flat hole is used for the penetration of the elastic sheet, the upper half part of the flat hole radially penetrates through the ejection column, and the lower half part of the flat hole radially penetrates through the positioning needle; the shell fragment divide into the substrate of lower part and the bullet arm of two mutual symmetries on upper portion, the substrate penetrates in the flat hole the latter half, two in the bullet arm penetrates flat hole the upper half, two the lateral wall of bullet arm all is equipped with the arc arch outside surpassing the fore-set outer wall, two maximum distance between the arc arch is greater than the aperture of nut hole.

2. The in-mold nut positioning structure of claim 1, wherein the spring plate is in a clearance-free fit with the flat hole.

3. The in-mold nut positioning structure of claim 1, wherein the top post is coaxial with the positioning pin.

4. The in-mold injection molding nut positioning structure according to claim 1, wherein the outer side wall of the elastic arm except the arc-shaped bulge is flush with the outer wall of the top pillar, the outer side wall of the substrate of the elastic sheet is flush with the outer wall of the positioning pin, and the step surface at the joint of the substrate of the elastic sheet and the elastic arm is flush with the step surface at the joint of the positioning pin and the top pillar.

5. The in-mold nut positioning structure of claim 1, wherein the gap between the two spring arms is a U-shaped groove, and the width of the U-shaped groove gradually decreases from the substrate toward the spring arms.

6. The in-mold nut positioning structure of claim 5 wherein the U-shaped channel extends to the substrate.

7. The in-mold nut positioning structure according to claim 5, wherein the elastic arm side walls on both sides of the U-shaped groove are inclined surfaces, and an acute angle formed by the elastic arm side walls and the axial direction of the positioning pin is 5 degrees.

8. The in-mold nut positioning structure of claim 1, wherein the spring plate is made of art blade steel.

9. An injection mold structure, characterized in that it comprises the in-mold injection nut positioning structure according to any one of claims 1 to 8.