CN115157593A

CN115157593A - Plastic injection mold convenient to heat dissipation

Info

Publication number: CN115157593A
Application number: CN202210643591.9A
Authority: CN
Inventors: 林春平
Original assignee: Xiamen Jingwei Industry And Trade Co ltd
Current assignee: Xiamen Jingwei Industry And Trade Co ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-10-11

Abstract

The invention relates to the technical field of injection molds, in particular to a plastic injection mold convenient for heat dissipation, which comprises an upper mold, a lower mold and a heat dissipation assembly, wherein the upper mold is connected and positioned with the lower mold through a positioning pin, an injection molding opening is formed in the upper mold, a heat conduction plate is arranged in the lower mold, the heat dissipation assembly is arranged in the lower mold and is positioned below the heat conduction plate, the heat dissipation assembly comprises a heat dissipation seat and a plurality of fins inserted in the heat dissipation seat, a plurality of first heat dissipation holes and second heat dissipation holes are formed in the fins, the first heat dissipation holes and the second heat dissipation holes are not positioned in the same plane, through holes are formed in the lower mold on two sides of the heat dissipation assembly, an adjusting cover is arranged on the outer side of each through hole, a first support plate and a second support plate which are arranged adjacently are arranged on the two sides of the top and the bottom of the heat dissipation seat, and positioning pieces are rotatably arranged between the first support plate and the inner wall of the lower mold. The invention sends the transferred heat out through the fins in the heat dissipation assembly, accelerates the cooling of the product and improves the forming speed.

Description

Plastic injection mold convenient to heat dissipation

Technical Field

The invention relates to the technical field of injection molds, in particular to a plastic injection mold convenient for heat dissipation.

Background

The structure of the mold may vary widely depending on the type and properties of the plastic, the shape and structure of the plastic product, and the type of injection machine, but the basic structure is consistent. In the continuous processing process of the injection mold, the injection molding material is continuously heated, the temperature of the mold rises, the product is molded slowly due to poor heat dissipation, the demolding time is prolonged, and the product is scrapped due to the deformation problem in the demolding process. Therefore, a plastic injection mold with convenient heat dissipation is needed to solve the above problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a plastic injection mold convenient for heat dissipation.

In order to achieve the purpose, the invention adopts the following technical scheme:

a plastic injection mold convenient for heat dissipation comprises an upper mold, a lower mold and a heat dissipation assembly, wherein the upper mold is connected and positioned with the lower mold through a positioning pin, and an injection molding opening is formed in the upper mold;

the heat-conducting plate is arranged in the lower die, the heat-radiating assembly is arranged in the lower die and is positioned below the heat-conducting plate, the heat-radiating assembly comprises a heat-radiating seat and a plurality of fins inserted in the heat-radiating seat, a plurality of first heat-radiating holes and second heat-radiating holes are formed in the fins, and the first heat-radiating holes and the second heat-radiating holes are not positioned in the same plane;

the through holes are formed in the lower die of the two sides of the heat dissipation assembly, the adjusting cover is arranged on the outer side of each through hole, the first supporting plate and the second supporting plate which are arranged adjacently are arranged on the two sides of the heat dissipation seat on the top and one side of the bottom of the heat dissipation seat, the positioning plate is rotatably arranged between the first supporting plate and the inner wall of the lower die, the second supporting plate is provided with a fixed shaft, two sliding columns are welded on the adjusting cover, the sliding columns are elastically arranged on the fixed shaft, and limiting plates are welded on the sliding columns.

Preferably, an outlet communicated with the injection molding opening is formed in the lower surface of the upper die, and the positioning pin is connected with the upper die and the lower die through threads.

Preferably, the lateral walls of the two sides of the heat dissipation seat are both in a mesh structure, and the heat dissipation seat is clamped between the two second support plates in the vertical direction.

Preferably, the positioning plate is of a cam structure, a rotating handle fixedly bonded with the positioning plate penetrates through the positioning plate, and the rotating handle is rotatably arranged between the inner walls of the lower die.

Preferably, the length of the fixed shaft is smaller than the distance between the inner wall of the lower die and the second support plate.

Preferably, a groove matched with the fixed shaft is formed in the sliding column, a spring is sleeved on the outer wall of the fixed shaft, and one end of the spring is welded and fixed with the second support plate.

Preferably, when the sliding column is in contact with the second support plate, one end of the positioning piece is clamped between the limiting piece and the inner wall of the lower die.

The invention has the beneficial effects that:

according to the invention, the heat-conducting plate and the heat-radiating assembly are arranged in the lower die, the heat of the formed product is transferred to the heat-radiating assembly by the heat-conducting plate, and the transferred heat is sent out through the through holes by the fins in the heat-radiating assembly, so that the cooling of the product is accelerated, and the forming speed is increased.

Drawings

FIG. 1 is a schematic structural diagram of a plastic injection mold facilitating heat dissipation according to the present invention;

FIG. 2 is a schematic side view of the internal structure of a lower mold of the plastic injection mold convenient for heat dissipation according to the present invention;

fig. 3 is a schematic side view of a fin of a plastic injection mold convenient for heat dissipation according to the present invention.

In the figure: 1. an upper die; 11. an injection molding port; 12. positioning pins; 2. a lower die; 21. a heat conducting plate; 22. a through hole; 23. a first support plate; 24. a second support plate; 25. a fixed shaft; 26. a handle is rotated; 3. a heat sink; 4. a fin; 41. a first heat dissipation hole; 42. a second heat dissipation hole; 5. an adjusting cover; 51. a traveler; 52. a limiting sheet; 6. and a positioning sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a plastic injection mold convenient for heat dissipation comprises an upper mold 1, a lower mold 2 and a heat dissipation assembly, wherein the upper mold 1 is connected and positioned with the lower mold 2 through a positioning pin 12, an injection port 11 is arranged on the upper mold 1, an outlet communicated with the injection port 11 is arranged on the lower surface of the upper mold 1, the positioning pin 12 is connected and arranged with the upper mold 1 and the lower mold 2 through threads, a rotary cover is arranged on the upper surface of the upper mold 1 at the top of the positioning pin 12, and the upper mold 1 is also connected with a lifting mechanism for up-and-down movement of the upper mold;

a heat conducting plate 21 is arranged in the lower die 2, the heat conducting plate 21 is arranged to transmit heat of a product to the direction of a heat dissipation assembly, the heat dissipation assembly is installed in the lower die 2 and is located below the heat conducting plate 21, the heat dissipation assembly comprises a heat dissipation seat 3 and a plurality of fins 4 inserted in the heat dissipation seat 3, the fins 4 are provided with even numbers and are of cavity structures, the fins 4 are provided with a plurality of first heat dissipation holes 41 and second heat dissipation holes 42, wherein the first heat dissipation holes 41 on the two fins 4 are opposite in direction, so that heat can be dispersed to two sides, the directions of the first heat dissipation holes 41 on the fins 4 on the other same sides are consistent with the direction of the first heat dissipation holes 41 on the fin 4, the directions of the second heat dissipation holes 42 on all the fins 4 are consistent with the direction of the first heat dissipation holes 41, the middle axis is used as a boundary and are respectively facing the side walls on two sides of the heat dissipation seat 3, the first heat dissipation holes 41 and the second heat dissipation holes 42 are not located in the same plane, the side walls on two sides of the heat dissipation seat 3 are of the mesh structure, and the heat dissipation seat 3 is clamped between the two second support plates 24 located in the vertical direction;

through holes 22 are formed in the two sides of the heat dissipation assembly on the lower die 2, adjusting covers 5 are arranged on the outer sides of the through holes 22, the setting of the adjusting covers 5 is convenient for heat overflow, a first support plate 23 and a second support plate 24 which are adjacently arranged are arranged on the two sides of the top and the bottom of the heat dissipation base 3, a positioning plate 6 is rotatably arranged between the inner walls of the first support plate 23 and the lower die 2, the positioning plate 6 is arranged for assisting in positioning the position of the adjusting covers 5, the positioning plate 6 is of a cam structure, a rotating handle 26 which is fixedly bonded with the positioning plate 6 penetrates through the positioning plate 6, the rotating handle 26 can drive the positioning plate 6 to rotate and adjust, the rotating handle 26 is rotatably arranged between the inner walls of the lower die 2, a fixing shaft 25 is welded on the second support plate 24, the length of the fixing shaft 25 is smaller than the distance between the inner wall of the lower die 2 and the second support plate 24, two sliding columns 51 are welded on the adjusting covers 5, the sliding columns 51 can facilitate the moving and adjusting covers of the adjusting covers 5, the sliding columns 51 are elastically arranged on the fixing shaft 25, limiting plates 52 are welded on the outer walls of the fixing shaft 25, and one end of springs are sleeved with the fixing shaft 24.

Further, when the slide column 51 contacts the second support plate 24, one end of the positioning plate 6 is clamped between the limiting plate 52 and the inner wall of the lower die 2.

Example 1:

in the embodiment, during injection molding, the upper mold 1 and the lower mold 2 are combined together, the upper mold 1 and the lower mold 2 are fixed by the positioning pin 12, feed liquid is injected into an injection molding cavity from the injection molding opening 11, after the injection molding is finished, the rotating handle 26 on the lower mold 2 is rotated to drive the positioning piece 6 to rotate towards one side far away from the limiting piece 52 (namely, rotate 180 degrees), so that one side of the limiting piece 52 is not limited at the moment, under the action of the spring, the sliding column 51 drives the adjusting cover 5 to bounce outwards, when the limiting piece 52 bounces to be in contact with the inner wall of the lower mold 2, the sliding column stops bouncing to the outside, and the through hole 22 is opened at the moment;

the heat of the intracavity of moulding plastics is through heat-conducting plate 21 downwardly transferring to radiator unit on, in radiator unit, the heat flows to fin 4 in through first louvre 41, flow from the second louvre 42 of opposite side again, and the position of second louvre 42 is towards the direction of through-hole 22 just, make the heat of outflow directly spill over from through-hole 22, thereby accelerate the heat dissipation of the intracavity product of moulding plastics, and then make the quick cooling shaping of product, after the complete molding, remove and go up mould 1, it can to take out the product from lower mould 2.

Example 2: compared with the embodiment 1, the difference is that the first heat dissipation holes 41 are formed in the vertically opposite side walls of the two sides of the fin 4, and the second heat dissipation holes 42 are not formed in the vertically opposite side walls of the other two sides.

Example 3: compared with embodiment 1, the difference is that the second heat dissipation hole 42 is formed on the other side wall opposite to the first heat dissipation hole 41, but the two adjacent fins 4 are installed oppositely, that is, counted from left to right, and the first heat dissipation hole 41 of the fin 4 located at the odd number position is opposite to the second heat dissipation hole 42 of the fin 4 located at the even number position.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A plastic injection mold convenient for heat dissipation comprises an upper mold (1), a lower mold (2) and a heat dissipation assembly, wherein the upper mold (1) is connected and positioned with the lower mold (2) through a positioning pin (12), and an injection opening (11) is formed in the upper mold (1);

the heat dissipation device is characterized in that a heat conduction plate (21) is arranged in the lower die (2), a heat dissipation assembly is installed in the lower die (2) and located below the heat conduction plate (21), the heat dissipation assembly comprises a heat dissipation seat (3) and a plurality of fins (4) inserted in the heat dissipation seat (3), the fins (4) are provided with a plurality of first heat dissipation holes (41) and second heat dissipation holes (42), and the first heat dissipation holes (41) and the second heat dissipation holes (42) are not located in the same plane;

through-hole (22) have all been seted up on lower mould (2) to radiator unit's both sides, the outside of through-hole (22) is provided with adjusting cover (5), the both sides of radiating seat (3) all are provided with adjacent first branch board (23) and the second branch board (24) that set up in one side of its top and bottom, it is provided with spacer (6) to rotate between the inner wall of first branch board (23) and lower mould (2), be provided with fixed axle (25) on second branch board (24), the welding has two travelers (51) on adjusting cover (5), traveler (51) elasticity sets up on fixed axle (25) and still weld spacing piece (52) on traveler (51).

2. The plastic injection mold convenient for heat dissipation according to claim 1, wherein an outlet communicated with the injection port (11) is formed in the lower surface of the upper mold (1), and the positioning pin (12) is in threaded connection with the upper mold (1) and the lower mold (2).

3. The plastic injection mold convenient for heat dissipation as defined in claim 1, wherein the side walls of the heat dissipation seat (3) are both in mesh structure, and the heat dissipation seat (3) is clamped between the two second support plates (24) in the vertical direction.

4. The plastic injection mold convenient for heat dissipation as defined in claim 1, wherein the positioning plate (6) is of a cam structure, and a rotating handle (26) fixedly bonded with the positioning plate is arranged in the positioning plate in a penetrating manner, and the rotating handle (26) is rotatably arranged between the inner walls of the lower mold (2).

5. The plastic injection mold facilitating heat dissipation as recited in claim 1, wherein the length of the fixed shaft (25) is smaller than the distance between the inner wall of the lower mold (2) and the second support plate (24).

6. The plastic injection mold convenient for heat dissipation according to claim 5, wherein a groove matched with the fixed shaft (25) is formed in the sliding column (51), a spring is sleeved on the outer wall of the fixed shaft (25), and one end of the spring is welded and fixed with the second support plate (24).

7. The plastic injection mold convenient for heat dissipation as defined in claim 1, wherein one end of the positioning plate (6) is clamped between the limiting plate (52) and the inner wall of the lower mold (2) when the sliding column (51) contacts the second support plate (24).