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CN-224224365-U - Injection molding fixing structure in nut die

CN224224365UCN 224224365 UCN224224365 UCN 224224365UCN-224224365-U

Abstract

The utility model discloses an in-mold injection fixing structure of a nut, which comprises a mold and a slide block insert pin, wherein the mold is provided with a side slide block, the slide block insert pin is arranged in the side slide block and used for bearing the nut and guiding the nut to be implanted into an injection molding position of a product, the in-mold injection fixing structure of the nut also comprises an elastic small pin, a processing mounting hole is formed in the slide block insert pin, the elastic small pin is arranged in the processing mounting hole, and one end, close to the head, of the elastic small pin is concavely provided with a clearance structure towards the axis direction, so that the elastic small pin has elastic deformation capability and is used for tightly supporting an inner hole of the nut to prevent falling. The utility model solves the problems of easy dropping of the nut and easy compression molding in the traditional process, is suitable for the injection mold of which the side sliding block of the product is embedded into the nut, and has the advantages of reliable positioning, convenient installation, production efficiency improvement and the like.

Inventors

  • TANG BINGWEI
  • YUAN WEIMIN
  • OuYang Debin

Assignees

  • 惠州市耀盈精密技术有限公司

Dates

Publication Date
20260512
Application Date
20250430

Claims (10)

  1. 1. The utility model provides a fixed knot that moulds plastics in nut mould, includes mould and slider insert the needle, the mould is equipped with the side slider, the slider insert the needle locate in the side slider for bear the nut and guide its implantation product injection molding position, its characterized in that, the fixed knot that moulds plastics in the nut mould still includes the elasticity little needle, set up the processing mounting hole in the slider insert the needle, the elasticity little needle install in the processing mounting hole, the one end that the elasticity little needle is close to its head is formed with the empty structure towards the concave setting of axis direction, makes the elasticity little needle possesses elastic deformation ability, is used for propping up the nut hole and prevents to drop.
  2. 2. An in-mold injection fixing structure for nuts as claimed in claim 1, wherein said void-avoiding structure has a dimension in the first direction in the range of 0.08mm to 0.12mm.
  3. 3. The in-mold injection fixing structure of a nut according to claim 1, wherein the elastic small needle is made of spring steel, titanium alloy or memory alloy material.
  4. 4. The in-mold injection fixing structure for nuts as claimed in claim 1, wherein said elastic small needle has a circular, square or corrugated cross-sectional shape.
  5. 5. The in-mold injection fixing structure of claim 1, wherein the cross-sectional profile of the void-avoiding structure is circular arc, trapezoid or zigzag.
  6. 6. The in-mold injection fixing structure of a nut according to claim 1, wherein the clearance structure length of the elastic small needle is 1/5-1/3 of the total length, and the clearance area and the non-clearance area are transited by chamfering.
  7. 7. The in-mold nut injection fixing structure according to claim 1, wherein the machining installation hole in the slider insert is a stepped hole, the machining installation hole comprises a guide section matched with the small elastic needle head and a limit section matched with the tail, the diameter of the guide section is smaller than that of the limit section, and the guide section and the limit section are combined to form an axial limit step.
  8. 8. The in-mold injection fixing structure of claim 7, wherein the inner wall of the guide section is provided with a thread groove for guiding the rotational positioning of the elastic small needle during the implantation.
  9. 9. The in-mold injection fixing structure of a nut according to claim 1, wherein an elastic buffer element is arranged at the bottom of the machining installation hole and is abutted against the tail of the elastic small needle.
  10. 10. The in-mold injection fixing structure of a nut according to claim 1, wherein a magnetic adsorption layer is arranged at the front end of the insert pin of the sliding block, and the magnetic adsorption layer is in magnetic attraction fit with the head of the small elastic pin.

Description

Injection molding fixing structure in nut die Technical Field The utility model relates to the technical field of injection molds, in particular to an in-mold injection fixing structure for nuts. Background In the field of injection molding, in-mold implantation of inserts (e.g., nuts, bolts, etc.) is a common process for achieving functional attachment of products. The process can remarkably improve the assembly performance of the product by pre-installing the metal insert in the mold cavity and then injecting molten plastic to firmly combine the metal insert with the insert. The mold structure with the side sliding block embedded into the nut is widely applied to the production of precision injection molding products such as automobile parts, electronic equipment shells and the like because the mold structure can realize the fixation of an insert in a complex space position. Along with the improvement of automatic production demands, the vertical injection molding machine is one of the main stream equipment of the in-mold implantation process due to the characteristics of vertical mold opening and closing, convenient insert installation and the like. Traditional in-mold nut fixation mainly relies on the rigid positioning of a slider insert pin, namely, limiting is realized by abutting the step structure of the insert pin part with the end face of the nut. The method has the following problems that the positioning accuracy requirement is high when the nut is implanted into the die, the manual operation is complicated, deviation is easy to occur, the nut is easy to fall off from the mounting position when the die rotates in the production process of the vertical injection molding machine, the die is damaged and the production continuity is affected due to the fact that the die accident is caused, and the nut falls off and needs to be frequently stopped and adjusted, so that the production cost is increased and the productivity is reduced. Therefore, the existing in-mold nut fixing structure has the problems of difficult installation, high falling risk and low production efficiency. Disclosure of utility model The present utility model is directed to solving, at least to some extent, one of the problems in the related art. Therefore, one of the purposes of the utility model is to provide an internal injection molding fixing structure of a screw female die, which is used for realizing stable fixation of nuts, solving the problems of difficult installation and falling off of the die and improving the production efficiency and the product quality. The utility model provides a fixed knot constructs of moulding plastics in nut mould, the fixed knot that moulds plastics in the spiral shell master model constructs including mould, slider insert needle and nut, the mould is equipped with the side slider, the slider insert needle is located in the side slider for bear the nut and guide its implantation product injection molding position, the fixed knot that moulds plastics in the spiral shell master model constructs still includes the elasticity little needle, set up the processing mounting hole in the slider insert needle, the elasticity little needle install in the processing mounting hole, the one end that the elasticity little needle is close to the head is formed with the empty structure towards the concave setting of axis direction, makes the elasticity little needle possesses elastic deformation ability for prop up the nut hole and prevent to drop. Further, the size of the void structure ranges from 0.08mm to 0.12mm. Further, the elastic small needle is made of spring steel, titanium alloy or memory alloy material. Further, the cross-section shape of the elastic small needle is round, square or corrugated. Further, the cross section outline of the clearance structure is arc-shaped, trapezoid-shaped or zigzag-shaped. Further, the length of the clearance structure of the elastic small needle accounts for 1/5-1/3 of the total length, and the clearance area and the non-clearance area are in transition through chamfering. Further, the installation hole inside the slider insert is a stepped hole, and comprises a guide section matched with the small elastic needle head and a limit section matched with the tail, the diameter of the guide section is smaller than that of the limit section, and the guide section and the limit section are combined to form an axial limit step. Further, the inner wall of the guide section is provided with a thread groove, and the thread groove is used for guiding the rotation positioning of the elastic small needle during implantation. Further, an elastic buffer element is arranged at the bottom of the mounting hole and is abutted with the tail of the elastic small needle. Further, the front end of the slider insert pin is provided with a magnetic adsorption layer which is in magnetic attraction fit with the head of the elastic small pin. Compared with the prior art, the technical scheme pr