Injection mold with side holes

Abstract

The utility model relates to an injection mold with a side hole, which comprises an upper mold frame and a lower mold assembly corresponding to the upper mold frame, the lower mold assembly comprises a lower mold frame, a mold core, a needle feeding plate and a needle ejecting piece, the lower mold frame is detachably connected with the mold core, the mold core is provided with a first cavity and needle threading grooves arranged on two sides of the first cavity, and the needle threading grooves are communicated with the first cavity. The lower die frame is slidably connected with a needle feeding plate, one end of the ejector pin piece is rotationally connected to the needle feeding plate, the other end of the ejector pin piece penetrates through the lower die frame and extends to the needle penetrating groove, and the ejector pin piece is provided with a protruding part used for forming a side hole in the direction facing the first cavity. The utility model mainly aims to form the main body of the injection molding piece through the first cavity and form the side hole of the injection molding piece through the convex part of the ejector pin piece, so that the injection molding piece is ejected out of the first cavity through the ejector pin piece by an injection molding machine by extruding the pin feeding plate during demolding, a pin drawing structure does not need to be configured, and the manufacturing cost of the mold is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of injection mold, especially to an injection mold with side holes. BACKGROUND

[0002] The injection mold is usually composed of two sets of mold frames, and during injection, the mold is clamped on the injection molding machine, the molten plastic is injected into the molding cavity, and then cooled and shaped in the cavity, and then the upper and lower molds are separated, and the plastic part is ejected from the mold cavity through the ejection system. In order to meet the product structure requirements, some plastic parts need to be opened towards the connecting hole perpendicular to the opening direction. In order to meet the demand of one-time injection molding, an independent pneumatic structure with a needle is installed on the side of the mold, which makes the mold structure complex and the manufacturing cost high. SUMMARY

[0003] In order to overcome the shortcomings of the background art, the utility model adopts the technical scheme: an injection mold with side holes, comprising an upper mold frame and a lower mold assembly corresponding to the upper mold frame, the lower mold assembly comprising a lower mold frame, a mold core, a needle feeding plate and a ejector pin, the lower mold frame is detachably connected with the mold core, the mold core is provided with a first cavity and a needle slot on both sides of the first cavity, the lower mold frame is slidingly connected with the needle feeding plate, one end of the ejector pin is rotatably connected to the needle feeding plate, the other end of the ejector pin extends through the lower mold frame to the needle slot, and the direction of the ejector pin towards the first cavity is provided with a protruding part for opening the side hole.

[0004] By adopting the above technical scheme, the main body of the injection molded part is formed by the first cavity, and the side hole of the injection molded part is formed by the protruding part of the ejector pin. When demolding, the injection molding machine extrudes the needle feeding plate, so that the ejector pin ejects the injection molded part out of the first cavity, without the need to configure a needle extraction structure, thereby reducing the manufacturing cost of the mold.

[0005] The utility model is further provided, the ejector pin is symmetrically distributed on both sides of the first cavity, the side of the ejector pin towards the protruding part is provided with a first inclined surface, and the other side is provided with a second inclined surface, and the height of the first inclined surface is lower than that of the second inclined surface.

[0006] Further, the distance H from the first inclined surface to the second inclined surface is not less than the depth of the needle slot.

[0007] Further, U-shaped grooves are arranged on both sides of the first cavity, and the protruding part and the U-shaped grooves are combined to form a second cavity communicating with the first cavity.

[0008] By adopting the above technical scheme, when the needle feeding plate ejects the injection molded part out of the first cavity, the ejector pin rotates outward relative to the injection molded part through the first inclined surface, so as to facilitate the injection molded part to separate from the ejector pin. When the needle feeding plate is reset, the protruding part is re- abutted to the U-shaped groove through the second inclined surface, so as to facilitate the next injection, and the overall structure is simple and the transmission is stable.

[0009] The utility model further sets up, the needle plate is equipped with the steering groove that presents rectangular array distribution, is equipped with the pivot in the steering groove, the ejector pin piece is connected in the needle plate through the pivot rotation, the lower mould is equipped with the open slot, the ejector pin piece extends to the needle slot in the open slot.

[0010] Adopt above-mentioned technical scheme, the ejector pin piece is connected with the needle plate through the pivot rotation, when needing to replace the ejector pin piece, the pivot is extruded out of the lower mould, and the ejector pin piece can be replaced.

[0011] The utility model further sets up, the lower mould is equipped with rectangular cavity and the positioning hole through the both sides of rectangular cavity, the both sides of mould core are equipped with the connecting hole corresponding with positioning hole, and the upper mould is connected with mould core through the positioning hole pin.

[0012] Adopt above-mentioned technical scheme, the positioning hole and the mounting hole combination form the through -hole through the lower mould, and the mould core is clamped in the lower mould through the long pin, when needing to replace the mould core, the long pin is extruded out of the lower mould, and the mould core can be replaced.

[0013] Compared with prior art, the beneficial effects of the utility model are:

[0014] 1. the main body of injection molding part is formed through the first cavity, and the side hole of injection molding part is formed through the protruding part of ejector pin piece, when demoulding, the injection molding machine is extruded the needle plate, so that the ejector pin piece ejects the injection molding part out of the first cavity, without configuring the needle extraction structure, reduce the manufacturing cost of mould.

[0015] 2. when the needle plate ejects the injection molding part out of the first cavity, the ejector pin piece is rotated outward relative to the injection molding part through the first inclined surface, so that the injection molding part automatically separates from the ejector pin piece.

[0016] The utility model embodiment is further explained below in connection with the drawings. DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 It is the structure schematic view of the lower mould assembly of the utility model;

[0019] Figure 3 It is the sectional view of the lower mould assembly of the utility model;

[0020] Figure 4 It is the Figure 3 partial close-up view of the front view of the utility model;

[0021] Figure 5 It is the front view of the ejector pin piece of the utility model;

[0022] Figure 6The utility model discloses a main view of injection molding part,

[0023] Among them: 1 - upper die holder, 2 - lower mould assembly, 3 - lower die holder, 4 - mould core, 5 - needle plate, 6 - ejector pin, 7 - injection molding part, 31 - opening groove, 32 - rectangular cavity, 33 - positioning hole, 41 - first cavity, 42 - needle slot, 43 - U-shaped groove, 44 - second cavity, 45 - connecting hole, 51 - turning groove, 52 - pivot, 61 - protruding part, 62 - first inclined surface, 63 - second inclined surface, 71 - mounting part, 72 - side hole, DETAILED DESCRIPTION

[0024] As Figure 1 , 2 , 5 shows, the utility model provides a side hole's injection mold that sets up, including upper die holder 1 and the lower mould assembly 2 corresponding with upper die holder 1, and the lower mould assembly 2 includes lower die holder 3, mould core 4, needle plate 5 and ejector pin 6, and lower die holder 3 detachably connects with mould core 4, and mould core 4 is equipped with first cavity 41 and is equipped with needle slot 42 at the both sides of first cavity 41, and lower die holder 3 is slidably connected with needle plate 5, and one end of ejector pin 6 is rotatably connected to needle plate 5, and the other end extends to needle slot 42 through lower die holder 3, and the direction of ejector pin 6 towards first cavity 41 is equipped with protruding part 61 for setting up side hole 72.

[0025] Combining Figure 3 , 4 As shown in the embodiment, the ejector pin 6 is symmetrically distributed on the two sides of the first cavity 41, the side of the ejector pin 6 towards the protruding part 61 is provided with a first inclined surface 62, and the other side is provided with a second inclined surface 63, the height of the first inclined surface 62 is lower than that of the second inclined surface 63, the distance H from the first inclined surface 62 to the second inclined surface 63 is not less than the depth of the needle slot 42, and the two sides of the first cavity 41 are provided with a U-shaped groove 43, and the protruding part 61 and the U-shaped groove 43 are combined to form a second cavity 44 in communication with the first cavity 41.

[0026] In the embodiment, the needle plate 5 is provided with turning grooves 51 arranged in a rectangular array, the turning grooves 51 are provided with pivots 52, the ejector pin 6 is rotatably connected to the needle plate 5 through the pivots 52, the lower die holder 3 is provided with an opening groove 31, the ejector pin 6 extends to the needle slot 42 through the opening groove 31, and the ejector pin 6 is rotatably connected to the needle plate 5 through the pivots 52, when the ejector pin 6 needs to be replaced, the pivots 52 are extruded out of the lower die holder 3, and then the ejector pin 6 can be replaced.

[0027] In the embodiment, the lower die frame 3 is provided with a rectangular cavity 32 and positioning holes 33 penetrating through two sides of the rectangular cavity 32, the mold core 4 is provided with connecting holes 45 corresponding to the positioning holes 33, the upper die frame 1 is connected with the mold core 4 through the positioning holes 33, the positioning holes 33 and the mounting holes are combined to form through holes penetrating through the lower die frame 3, and the mold core 4 is clamped to the lower die frame 3 through long pins, when the mold core 4 needs to be replaced, the long pins are extruded out of the lower die frame 3, and then the mold core 4 can be replaced.

[0028] In combination Figure 6 As shown in the utility model, the working principle is that, in production, the injection molding machine controls the upper die frame 1 and the lower die frame 3 to be closed and injection molded, the first cavity 41 forms the main body of the injection molded part 7, the second cavity 44 forms the mounting portions 71 on two sides of the injection molded part 7, and the convex portion 61 forms the side holes 72 on the mounting portions 71, when demolding, the injection molding machine moves the needle plate 5 towards the direction of the mold core 4, the ejector pins 6 on two sides of the first cavity 41 eject the injection molded part 7 out of the first cavity 41, the ejector pins 6 are rotated outwards relative to the injection molded part 7 through the first inclined surface 62, at this time, the injection molded part 7 is automatically separated from the ejector pins 6 through the action of gravity, thereby completing demolding, when the needle plate 5 is reset, the convex portion 61 is abutted against the U-shaped groove 43 again through the second inclined surface 63, so as to facilitate next injection molding.

[0029] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. An injection mold with a side hole, characterized in that: The application relates to a mold assembly, which comprises an upper mold frame (1) and a lower mold assembly (2) corresponding to the upper mold frame (1), wherein the lower mold assembly (2) comprises a lower mold frame (3), a mold core (4), a needle plate (5) and a needle piece (6), the mold core (4) is detachably connected to the lower mold frame (3), the mold core (4) is provided with a first cavity (41) and needle passing grooves (42) arranged on both sides of the first cavity (41), the needle plate (5) is slidably connected to the lower mold frame (3), one end of the needle piece (6) is rotatably connected to the needle plate (5), the other end of the needle piece (6) extends to the needle passing grooves (42) through the lower mold frame (3), and the needle piece (6) is provided with a protruding part (61) for opening a side hole (72) on the side facing the first cavity (41).

2. A side-gated injection mold according to claim 1, characterized in that: The needle piece (6) is symmetrically arranged on both sides of the first cavity (41), the needle piece (6) is provided with a first inclined surface (62) on one side facing the protruding part (61) and a second inclined surface (63) on the other side, and the height of the first inclined surface (62) is lower than that of the second inclined surface (63).

3. A side-gated injection mold according to claim 2, wherein: The distance H from the first inclined surface (62) to the second inclined surface (63) is not less than the depth of the needle passing grooves (42).

4. A side-gated injection mold according to claim 3, wherein: Both sides of the first cavity (41) are provided with U-shaped grooves (43), and the protruding part (61) and the U-shaped grooves (43) combine to form a second cavity (44) communicating with the first cavity (41).

5. A side-gated injection mold according to claim 1, wherein: The needle plate (5) is provided with turning grooves (51) arranged in a rectangular array, the turning grooves (51) are provided with rotating shafts (52), the needle piece (6) is rotatably connected to the needle plate (5) through the rotating shafts (52), the lower mold frame (3) is provided with an opening groove (31), and the needle piece (6) extends to the needle passing grooves (42) through the opening groove (31).

6. A side-gated injection mold according to claim 1, wherein: The lower mold frame (3) is provided with a rectangular cavity (32) and positioning holes (33) penetrating through both sides, both sides of the mold core (4) are provided with connecting holes (45) corresponding to the positioning holes (33), and the mold core (4) is pin-connected to the upper mold frame (1) through the positioning holes (33).

Images