CN221677956U - Injection mold cooling structure - Google Patents

Abstract

The utility model provides an injection mold cooling structure, and belongs to the technical field of molds. It has solved the not good enough problem of current mould cooling effect. The cooling structure comprises a cooling flow passage which horizontally penetrates through the lower end of the male die and is in a straight strip shape, a plurality of cooling holes are vertically formed in the male die and are distributed along the length direction of the cooling flow passage, the top and the bottom of each cooling hole are in a closed shape, the upper end of each cooling hole extends to the upper end of the male die, and the lower end of each cooling hole penetrates through the cooling flow passage; and each radiating hole is vertically fixed with a radiating fin, and the bottom surface of the radiating fin is positioned at the lower side of the cooling flow passage. The cooling structure of the injection mold has good cooling effect.

Description

Injection mold cooling structure

Technical Field

The utility model belongs to the technical field of molds and relates to an injection mold, in particular to an injection mold cooling structure.

Background Art

An injection mold is a tool for producing plastic products and also a tool for giving plastic products a complete structure and precise size.

The existing injection mold, such as a universal injection mold with a cold runner disclosed in the Chinese Patent Library (application number: 201810577809.9), comprises a cold runner frame plate and a valve needle; the upper part of the cold runner frame plate is provided with a groove portion; the characteristics are: a lower manifold and an upper manifold are provided in the groove portion; the upper manifold is provided above the lower manifold; the upper surface of the lower manifold is provided with a fully balanced manifold flow channel; the lower surface of the upper manifold A fully balanced manifold flow channel is provided; the fully balanced manifold flow channel on the upper surface of the lower manifold cooperates with the fully balanced manifold flow channel on the lower surface of the upper manifold to form a manifold flow channel; a mold plate is provided at the lower part of the cold runner frame plate; a mold mounting hole is provided on the lower surface of the mold plate; a mold is installed in the mold mounting hole; an insulation board is provided between the cold runner frame plate and the mold plate; a cold runner panel is provided on the upper surface of the cold runner frame plate; the cold runner A panel is provided on the upper part of the cold runner panel; an oil-gas cylinder drive system is provided in the middle between the cold runner frame plate and the panel, and square irons are provided on both sides; a cold runner nozzle installation space is formed on the cold runner frame plate and the mold core plate; a cold runner nozzle is provided in the cold runner nozzle installation space; a nozzle inlet and outlet water path is provided on the cold runner frame plate; the nozzle inlet and outlet water path is connected with the cold runner nozzle; a manifold cooling water path is provided on the lower manifold plate and the upper manifold plate respectively; the upper A manifold sealing sleeve installation space is provided on the manifold; a manifold sealing sleeve is installed in the manifold sealing sleeve installation space; the upper end of the valve needle is provided on the oil and gas cylinder drive system, and the lower part passes through the upper manifold, the lower manifold, the cold runner frame plate and the mold core plate in sequence, and is inserted into the cold runner nozzle; the manifold sealing sleeve is provided on the valve needle; a cavity is provided at the lower part of the mold core; the cavity is connected with the cold runner nozzle; the cavity is used to place product inserts and mold products.

The above-mentioned injection mold quickly cools down the finished product by setting a cold runner, but the height of the cold runner is generally narrow. For a punch with an inclined molding surface, the thickness of the punch is large due to the setting of the inclined surface, and a simple cold runner cannot dissipate heat for this punch well.

Utility Model Content

The utility model aims to solve the above problems in the prior art and proposes an injection mold cooling structure which can enhance the cooling effect of a thicker punch.

The purpose of the utility model can be achieved through the following technical solutions: an injection mold cooling structure, the mold includes a concave mold with a concave cavity at the bottom and a punch arranged in the concave cavity, and a molding cavity is formed between the outer surface of the upper end of the punch and the inner surface of the concave cavity, and the lower end of the punch extends out of the concave cavity. The cooling structure includes a cooling channel that horizontally passes through the lower end of the punch and is in the shape of a straight strip, and is characterized in that a straight strip-shaped heat dissipation hole is vertically provided in the punch, and there are multiple heat dissipation holes distributed along the length direction of the cooling channel. The top and bottom of the heat dissipation hole are closed, the upper end of the heat dissipation hole extends to the upper end of the punch, and the lower end of the heat dissipation hole passes through the cooling channel; a heat sink is vertically fixed in each heat dissipation hole, and the bottom surface of the heat sink is at the lower side of the cooling channel.

When in use, cooling water enters through one end of the cooling channel and is discharged from the other end of the cooling channel to achieve circulation.

A plurality of heat dissipation holes distributed along the length direction of the cooling channel are arranged in the punch, each heat dissipation hole is connected to the cooling channel, and a heat sink is arranged in each heat dissipation hole for heat exchange, which can effectively improve the heat dissipation speed of the punch, greatly speed up the cooling speed of the finished product, and improve the injection molding efficiency.

In the above-mentioned injection mold cooling structure, the heat dissipation hole is composed of a forming hole vertically opened in the male mold and a connecting block integrally formed on the bottom wall of the heat sink. The forming hole is closed at the top and open at the bottom. The connecting block is fixed in the lower end of the forming hole and closes the lower end of the forming hole. The heat sink is used for heat exchange to accelerate the heat dissipation of the male mold and is also used to form the heat dissipation hole. That is, in this application, the heat sink has a dual-purpose effect to simplify the structure and facilitate assembly.

In the above-mentioned injection mold cooling structure, the connecting block is threadedly connected in the lower end of the molding hole, which is convenient for the installation and positioning of the heat sink.

In the above-mentioned injection mold cooling structure, the type of the molding hole is a round hole, which is easy to design and process.

In the above-mentioned injection mold cooling structure, an annular groove is opened on the outer wall of the connecting block, an O-ring is arranged in the annular groove, and the outer peripheral surface of the O-ring contacts and seals with the hole wall of the forming hole to strengthen the sealing effect formed between the connecting block and the forming hole, prevent cooling water leakage, and ensure the stable operation of the cooling structure.

In the above-mentioned injection mold cooling structure, a polygonal hole is provided on the bottom wall of the connecting block, and the polygonal hole cooperates with the tool to facilitate the screwing in of the heat sink.

In the above-mentioned injection mold cooling structure, both sides of the heat sink are pressed against the inner wall of the molding hole, thereby increasing the contact area between the heat sink and the punch and further accelerating the heat exchange speed.

In the above-mentioned injection mold cooling structure, water pipes are inserted into both ends of the cooling channel, the outer ends of the water pipes extend out of the cooling channel, and the inner ends of the water pipes are sealed and fixedly connected to the punch. The water pipes are provided to facilitate the cooling channel to connect to the cooling water supply equipment and form a circulation.

In the above-mentioned injection mold cooling structure, the outer wall of the water guide pipe is in close contact and fixedly connected with the inner wall of the cooling channel.

In the above-mentioned injection mold cooling structure, annular steps are formed on the inner walls at both ends of the cooling channel, and the annular steps are composed of annular side surfaces and annular bottom surfaces. Annular sealing gaskets are provided in the two annular steps, and the two end surfaces of the sealing gaskets are respectively pressed tightly against the inner end surface of the corresponding water pipe and the corresponding annular bottom surface to further enhance the sealing effect formed between the water pipe and the punch.

In the above-mentioned injection mold cooling structure, the mold also includes a mold base, a mounting cavity matching the lower end of the punch is opened on the top wall of the mold base, the lower end of the punch is inserted into the mounting cavity and fixedly connected to the mold base, and a connecting block is pressed on the bottom wall of the mounting cavity, and the mounting cavity is provided with two through holes for the outer ends of the two water pipes to extend out. The connecting block is pressed on the bottom wall of the mounting cavity to prevent the heat sink from falling off.

Compared with the prior art, this injection mold cooling structure has the following advantages:

1. Multiple heat dissipation holes are arranged in the punch along the length direction of the cooling channel. Each heat dissipation hole is connected to the cooling channel, and a heat sink is arranged in each heat dissipation hole for heat exchange, which can effectively improve the heat dissipation speed of the punch, greatly speed up the cooling speed of the finished product, and improve the injection molding efficiency.

2. The heat sink is used for heat exchange to accelerate the heat dissipation of the punch, and is also used to form heat dissipation holes. That is, in this application, the heat sink has a dual purpose effect to simplify the structure and facilitate assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an injection mold.

FIG. 2 is an enlarged schematic diagram of point A in FIG. 1 .

FIG. 3 is a schematic diagram of the structure of a heat sink.

In the figure, 1, die; 2, punch; 2a, cooling channel; 2b, heat dissipation hole; 2b1, forming hole; 3, forming cavity; 4, heat sink; 4a, connecting block; 4a1, polygonal hole; 5, O-ring; 6, water guide pipe; 7, sealing gasket; 8, mold base.

DETAILED DESCRIPTION

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in FIG1 , the injection mold includes a concave mold 1 with a concave cavity at the bottom, and a convex mold 2 arranged in the concave cavity, wherein a molding cavity 3 is formed between the upper outer surface of the convex mold 2 and the inner surface of the concave cavity, and the lower end of the convex mold 2 extends out of the concave cavity.

As shown in Figures 1 to 3, the injection mold cooling structure includes a cooling channel 2a that runs horizontally through the lower end of the punch 2 and is in the shape of a straight strip. As shown in Figure 1, the punch 2 is also vertically provided with a straight strip-shaped heat dissipation hole 2b. There are multiple heat dissipation holes 2b and they are distributed along the length direction of the cooling channel 2a. The top and bottom of the heat dissipation hole 2b are both closed. The upper end of the heat dissipation hole 2b extends to the upper end of the punch 2, and the lower end of the heat dissipation hole 2b passes through the cooling channel 2a. A heat sink 4 is vertically fixed in each heat dissipation hole 2b, and the bottom surface of the heat sink 4 is on the lower side of the cooling channel 2a. Among them, the heat sink 4 is made of aluminum alloy material. Naturally, the heat sink 4 can also be made of brass material.

When in use, cooling water enters through one end of the cooling channel 2a and is discharged from the other end of the cooling channel 2a to achieve circulation.

A plurality of heat dissipation holes 2b distributed along the length direction of the cooling channel 2a are arranged in the punch 2, each heat dissipation hole 2b is connected to the cooling channel 2a, and a heat sink 4 is arranged in each heat dissipation hole 2b for heat exchange, which can effectively improve the heat dissipation speed of the punch 2, greatly speed up the cooling speed of the finished product, and improve the injection molding efficiency.

In this embodiment,

The heat dissipation hole 2b is formed as follows: the heat dissipation hole 2b is composed of a forming hole 2b1 vertically opened in the male mold 2 and a connecting block 4a integrally formed on the bottom wall of the heat sink 4. The forming hole 2b1 is closed at the top and open at the bottom, and the connecting block 4a is fixed in the lower end of the forming hole 2b1 and closes the lower end of the forming hole 2b1. The heat sink 4 is used for heat exchange to accelerate the heat dissipation of the male mold 2, and is also used to form the heat dissipation hole 2b. That is, in this application, the heat sink 4 has a dual-purpose effect to simplify the structure and facilitate assembly.

Preferably, the heat sink 4 and the connecting block 4a are integrally formed by casting.

As shown in Fig. 1 and Fig. 2, the connection block 4a is installed as follows: the connection block 4a is threadedly connected to the lower end of the forming hole 2b1, which is convenient for the installation and positioning of the heat sink 4. Further explanation: the type of the forming hole 2b1 is a round hole, which is convenient for design and processing. An annular groove is provided on the outer wall of the connection block 4a, and an o-ring 5 is provided in the annular groove. The outer peripheral surface of the o-ring 5 contacts and seals with the hole wall of the forming hole 2b1 to strengthen the sealing effect formed between the connection block 4a and the forming hole 2b1, prevent cooling water leakage, and ensure the stable operation of the cooling structure.

Furthermore, a polygonal hole 4a1 is provided on the bottom wall of the connecting block 4a, and the polygonal hole 4a1 cooperates with the tool to facilitate the screwing in of the heat sink 4. Both sides of the heat sink 4 are pressed on the inner wall of the forming hole 2b1, increasing the contact area between the heat sink 4 and the punch 2, further accelerating the heat exchange speed.

As shown in Figures 1 and 2, water pipes 6 are inserted into both ends of the cooling channel 2a, the outer ends of the water pipes 6 extend out of the cooling channel 2a, and the inner ends of the water pipes 6 are sealed and fixedly connected to the punch 2. The water pipes 6 are provided to facilitate the cooling channel 2a to be connected to the cooling water supply equipment and form a circulation.

Among them, the outer wall of the water pipe 6 is in close contact and fixed connection with the inner wall of the cooling channel 2a. It is further explained that annular steps are formed on the inner walls at both ends of the cooling channel 2a, and the annular steps are composed of annular side surfaces and annular bottom surfaces. Annular sealing gaskets 7 are provided in the two annular steps, and the two end surfaces of the sealing gasket 7 are respectively pressed tightly against the inner end surface and the corresponding annular bottom surface of the corresponding water pipe 6 to further enhance the sealing effect formed between the water pipe 6 and the punch 2.

In the actual product, the mold also includes a mold base 8, and a mounting cavity matching the lower end of the punch 2 is opened on the top wall of the mold base 8. The lower end of the punch 2 is inserted into the mounting cavity and fixedly connected to the mold base 8, and the connecting block 4a is pressed on the bottom wall of the mounting cavity. The mounting cavity is provided with two through holes for the outer ends of the two water pipes 6 to extend out. The connecting block 4a is pressed on the bottom wall of the mounting cavity to prevent the heat sink 4 from falling off.

The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims (10)

1. An injection mold cooling structure, the mold comprising a concave mold (1) with a concave cavity at the bottom and a convex mold (2) arranged in the concave cavity, wherein a molding cavity (3) is formed between the outer surface of the upper end of the convex mold (2) and the inner surface of the concave cavity, and the lower end of the convex mold (2) extends out of the concave cavity. The cooling structure comprises a cooling channel (2a) which horizontally passes through the lower end of the convex mold (2) and is in the form of a straight strip, and is characterized in that a straight strip-shaped heat dissipation hole (2b) is vertically arranged in the convex mold (2), the heat dissipation hole (2b) is in a plurality and is distributed along the length direction of the cooling channel (2a), the top and bottom of the heat dissipation hole (2b) are both closed, the upper end of the heat dissipation hole (2b) extends to the upper end of the convex mold (2), and the lower end of the heat dissipation hole (2b) passes through the cooling channel (2a); a heat dissipation fin (4) is vertically fixed in each heat dissipation hole (2b), and the bottom surface of the heat dissipation fin (4) is located at the lower side of the cooling channel (2a). 2. The injection mold cooling structure according to claim 1 is characterized in that the heat dissipation hole (2b) is composed of a forming hole (2b1) vertically opened in the punch (2) and a connecting block (4a) integrally formed on the bottom wall of the heat sink (4), the forming hole (2b1) is closed at the top and open at the bottom, and the connecting block (4a) is fixed in the lower end of the forming hole (2b1) and closes the lower end of the forming hole (2b1). 3. The injection mold cooling structure according to claim 2, characterized in that the connecting block (4a) is threadedly connected to the lower end of the molding hole (2b1). 4. The injection mold cooling structure according to claim 3 is characterized in that the type of the molding hole (2b1) is a circular hole; an annular groove is opened on the outer wall of the connecting block (4a), an O-ring (5) is arranged in the annular groove, and the outer peripheral surface of the O-ring (5) contacts and seals with the hole wall of the molding hole (2b1). 5. The injection mold cooling structure according to claim 4, characterized in that a polygonal hole (4a1) is provided on the bottom wall of the connecting block (4a). 6. The injection mold cooling structure according to claim 3 or 4, characterized in that two sides of the heat sink (4) are pressed against the inner wall of the molding hole (2b1). 7. The injection mold cooling structure according to claim 1 is characterized in that water pipes (6) are inserted into both ends of the cooling channel (2a), the outer ends of the water pipes (6) extend out of the cooling channel (2a), and the inner ends of the water pipes (6) are sealed and fixedly connected to the punch (2). 8. The injection mold cooling structure according to claim 7, characterized in that the outer wall of the water conduit (6) is in close contact and fixed connection with the inner wall of the cooling channel (2a). 9. The injection mold cooling structure according to claim 8 is characterized in that annular steps are formed on the inner walls at both ends of the cooling channel (2a), and the annular steps are composed of an annular side surface and an annular bottom surface. An annular sealing gasket (7) is provided in each of the two annular steps, and the two end surfaces of the sealing gasket (7) are respectively pressed tightly against the inner end surface of the corresponding water pipe (6) and the corresponding annular bottom surface. 10. The injection mold cooling structure according to claim 3 is characterized in that the mold further comprises a mold base (8), a mounting cavity matching the lower end of the punch (2) is opened on the top wall of the mold base (8), the lower end of the punch (2) is inserted into the mounting cavity and fixedly connected to the mold base (8), and the connecting block (4a) is pressed on the bottom wall of the mounting cavity, and two through holes are provided on the mounting cavity for the outer ends of the two water pipes (6) to extend out respectively.