Cooling structure for injection mold and injection mold convenient for cooling internal product

Abstract

The invention relates to a cooling structure for an injection mold, in particular to an injection mold convenient for cooling an internal product. The cooling structure comprises a fixed mold plate (8) and a movable mold plate (9), the fixed mold plate (8) and the movable mold plate (9) are closed to form a mold cavity; a cooling structure for the injection mold is arranged in the mold cavity; the cooling structure for the injection mold comprises a movable mold insert (2), a red copper ridge piece (3) and a cooling pipeline (4) which are sequentially connected in an abutting mode. And one end, opposite to the red copper ridge piece (3), of the movable mold insert (2) is propped against a product. Compared with the prior art, the injection mold facilitating cooling of the internal product is designed, the cooling structure for the injection mold is arranged in the injection mold, the product, the movable mold insert, the red copper ridge piece and the cooling pipeline abut against one another in sequence, and the movable mold insert transfers heat of the product to the red copper ridge piece; cooling liquid flowing through the cooling pipeline takes away heat on the red copper ridge piece, and product cooling is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a cooling structure for an injection mold, which is convenient for cooling internal parts of the injection mold. Background Art

[0002] Plastic parts can be molded by high-temperature plastic injection molding. During the injection molding process, the heat of the high-temperature plastic is transferred to the surroundings. If the cooling is insufficient or uneven, it will cause errors in the dimensions of batch products or even all of them will be scrapped.

[0003] At present, the cooling methods in the industry include: (2) cooling pipes processed by traditional processing technology, such as milling machines; (2) using beryllium copper to make parts, and removing heat through coolant contact with parts; (3) 3D printing parts, cooling pipes cover the product to the greatest extent, and maximize heat removal. The above three are the most widely used cooling methods in the existing market, but they all have the following difficult to solve problems: traditional processing cooling pipes are the most stable, but due to process limitations, the cooling effect is poor; parts made of beryllium copper have good cooling effects, but the hardness of beryllium copper is much different from that of traditional materials, it is easy to damage, and the life span cannot be guaranteed; parts made by 3D printing have good cooling effects, but the application of them on micro parts is not good, mainly because the cooling pipes are small and easy to clog, which loses the cooling effect and causes poor product size. Summary of the invention

[0004] The purpose of the present invention is to overcome at least one of the defects of the above-mentioned prior art and to provide an injection mold with a cooling structure that facilitates cooling of the internal product.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] One of the purposes of the present invention is to provide a cooling structure for an injection mold, which is used for cooling the product inside the mold, and comprises a movable mold insert, a copper sill, and a cooling pipe which are abutted in sequence;

[0007] One end of the movable mold insert relative to the copper edge piece abuts against the product;

[0008] The movable mold insert transfers the heat of the product to the copper sill piece, and the coolant flowing through the cooling pipeline takes away the heat from the copper sill piece, thereby realizing cooling of the product.

[0009] In one embodiment of the present invention, the side of the copper sill is provided with a plurality of fins for heat dissipation. In the present invention, the fins are arranged at equal intervals on the side of the copper sill and are all straight plates. The provision of the heat dissipation fins achieves a better heat dissipation effect, makes the overall heat dissipation more balanced, and avoids local overheating.

[0010] In one embodiment of the present invention, the cooling pipe is a flat-bottomed U-shaped pipe, and the flat bottom can ensure that the cooling pipe is in full contact with the copper sill.

[0011] In one embodiment of the present invention, one end of the cooling pipe abutting against the copper sill is provided with a groove for the copper sill to extend into, thereby increasing the contact area between the cooling pipe and the copper sill, taking away heat better and faster, and speeding up the working rhythm.

[0012] The second object of the present invention is to provide an injection mold that is convenient for cooling internal parts, including a fixed mold plate and a movable mold plate;

[0013] The fixed mold plate and the movable mold plate are closed to form a mold cavity; the mold cavity is provided with the above-mentioned cooling structure for the injection mold.

[0014] In one embodiment of the present invention, a hot runner plate is disposed on the top surface of the fixed mold plate.

[0015] In one embodiment of the present invention, an upper fixing plate is provided on the top surface of the hot runner plate.

[0016] In one embodiment of the present invention, an upper ejector plate is provided on the bottom surface of the movable template.

[0017] In one embodiment of the present invention, a lower ejector plate is provided on the bottom surface of the upper ejector plate.

[0018] In one embodiment of the present invention, a lower fixing plate is provided on the bottom surface of the lower ejector plate.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) The present invention designs a cooling structure for an injection mold, in which a product, a movable mold insert, a copper sill piece, and a cooling pipe are sequentially abutted, the movable mold insert transfers the heat of the product to the copper sill piece, and the coolant flowing through the cooling pipe takes away the heat from the copper sill piece, thereby cooling the product.

[0021] (2) The present invention designs a cooling structure for an injection mold, in which a plurality of fins for facilitating heat dissipation are provided on the side of a copper step.

[0022] (3) The present invention provides a cooling structure for an injection mold, wherein one end of the cooling pipe abutting against the copper sill is provided with a groove for facilitating the insertion of the copper sill.

[0023] (4) The present invention designs a cooling structure for an injection mold that is simple, stable in application, and relatively low in cost.

[0024] (4) The present invention designs a cooling structure for an injection mold that is simple, stable in application, and relatively low in cost.

[0025] (5) The present invention designs a cooling structure for an injection mold, the hardness and strength of which can meet production requirements and will not cause strain due to product demoulding.

[0026] (6) The present invention designs an injection mold that is convenient for cooling the internal product. A cooling structure for the injection mold is provided between the movable mold and the fixed mold of the mold, which can avoid blockage caused by the small cross-section of the cooling water channel in the prior art, affecting the cooling effect and causing poor product size. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A cross-sectional view of an injection mold for facilitating internal product cooling in an embodiment;

[0028] Figure 2 is a cross-sectional view of a cooling structure for an injection mold in an embodiment;

[0029] The numbers in the figure are as follows: 1. Product, 2. Moving mold insert, 3. Copper insert, 4. Coolant, 5. Cooling pipe, 6. Upper fixed plate, 7. Hot runner plate, 8. Fixed mold plate, 9. Moving mold plate, 10. Upper ejector plate, 11. Lower ejector plate, 12. Lower fixed plate. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0031] Example

[0032] See Figure 1 , 2 , a cooling structure for an injection mold, used for cooling the product inside the mold, comprising a movable mold insert 2, a copper sill 3, and a cooling pipe 4 abutting against each other in sequence;

[0033] One end of the movable mold insert 2 relative to the copper edge piece 3 abuts against the product;

[0034] The movable mold insert 2 transfers the heat of the product to the copper sill piece 3, and the coolant flowing through the cooling pipe 4 takes away the heat from the copper sill piece 3, thereby cooling the product.

[0035] In this embodiment, a plurality of fins are provided on the side of the copper sill 3 for heat dissipation. The fins are arranged at equal intervals on the side of the copper sill 3 and are all straight plates. The provision of the heat dissipation fins achieves a better heat dissipation effect, makes the overall heat dissipation more balanced, and avoids local overheating.

[0036] In this embodiment, the cooling pipe 4 is a flat-bottomed U-shaped pipe, and the flat bottom can ensure that the cooling pipe 4 is in full contact with the copper sill 3. One end of the cooling pipe 4 that abuts against the copper sill 3 is provided with a groove for the copper sill 3 to extend into, thereby increasing the contact area between the cooling pipe 4 and the copper sill 3, taking away heat better and faster, and speeding up the work rhythm.

[0037] See Figure 1 An injection mold that is convenient for cooling internal parts includes a fixed mold plate 8 and a movable mold plate 9; the fixed mold plate 8 and the movable mold plate 9 are closed to form a mold cavity; the mold cavity is provided with a cooling structure for the injection mold as above.

[0038] In this embodiment, a hot runner plate 7 is disposed on the top surface of the fixed mold plate 8. An upper fixed plate 6 is disposed on the top surface of the hot runner plate 7. An upper ejector plate 10, a lower ejector plate 11 and a lower fixed plate 12 are disposed on the bottom surface of the movable mold plate 9 in sequence.

[0039] In this embodiment, the movable mold insert 2 is made of traditional mold steel, and its hardness and strength can meet the industry requirements. The manufacturing process of the movable mold insert 2 is relatively simple, and the traditional NC and welding processes can complete the key features of the parts. The disadvantage is that the cooling pipe cannot be designed at the head position of the movable mold insert 2. The cooling of the head position of the movable mold insert 2 is crucial to the product molding cycle. In this embodiment, the copper embedding method is adopted, and the heat is taken away by the coolant flowing at the other end, thereby achieving a cooling effect.

[0040] Working principle:

[0041] In the cooling structure for the injection mold in this embodiment, the coolant 4 flows through the cooling pipe 5, the copper insert 3 is in contact with the coolant 4, the heat of the product 1 will be conducted to the movable mold insert 2, and the heat of the movable mold insert 2 will be conducted to the copper insert 3. When the coolant 4 flows through the copper insert 3, a large amount of heat will be taken away to achieve a cooling effect.

[0042] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A cooling structure for an injection mold, used for cooling the product inside the mold, characterized in that: It comprises a movable mold insert (2), a copper sill (3), and a cooling pipe (4) which are abutted in sequence; One end of the movable mold insert (2) relative to the copper edge piece (3) is in contact with the product; The movable mold insert (2) transfers the heat of the product to the copper sill piece (3), and the coolant flowing through the cooling pipe (4) takes away the heat on the copper sill piece (3), thereby achieving cooling of the product.

2. A cooling structure for an injection mold according to claim 1, characterized in that: The side surface of the copper sill (3) is provided with a plurality of fins for facilitating heat dissipation.

3. The cooling structure for injection mold according to claim 1, characterized in that: The cooling pipe (4) is a flat-bottomed U-shaped pipe.

4. The cooling structure for injection mold according to claim 1, characterized in that: One end of the cooling pipe (4) that abuts against the copper sill piece (3) is provided with a groove for facilitating the insertion of the copper sill piece (3).

5. An injection mold that facilitates cooling of internal parts, characterized in that: It comprises a fixed die plate (8) and a movable die plate (9); The fixed mold plate (8) and the movable mold plate (9) are closed to form a mold cavity; the mold cavity is provided with a cooling structure for an injection mold as claimed in any one of claims 1 to 4.

6. The injection mold for facilitating cooling of internal parts according to claim 5, characterized in that: A hot runner plate (7) is provided on the top surface of the fixed mold plate (8).

7. An injection mold for facilitating cooling of internal parts according to claim 6, characterized in that: An upper fixing plate (6) is provided on the top surface of the hot runner plate (7).

8. The injection mold for facilitating cooling of internal parts according to claim 5, characterized in that: An upper ejector plate (10) is provided on the bottom surface of the movable plate (9).

9. An injection mold for facilitating cooling of internal parts according to claim 8, characterized in that: A lower ejector plate (11) is provided on the bottom surface of the upper ejector plate (10).

10. The injection mold for facilitating cooling of internal parts according to claim 9, characterized in that: A lower fixing plate (12) is provided on the bottom surface of the lower ejector plate (11).

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