WO2024093342A1

WO2024093342A1 - Hot-nozzle cooling cylinder and injection mold

Info

Publication number: WO2024093342A1
Application number: PCT/CN2023/106219
Authority: WO
Inventors: 焦太景; 张俊
Original assignee: 艾默斯智能科技(深圳)有限公司
Priority date: 2022-11-03
Filing date: 2023-07-07
Publication date: 2024-05-10
Also published as: CN115570760A

Abstract

Disclosed in the present application are a hot-nozzle cooling cylinder and an injection mold. The injection mold is provided with a cooling water path and a mounting hole in communication with the cooling water path, the mounting hole being in communication with a cavity of the injection mold. The hot-nozzle cooling cylinder comprises a cylinder body and an end cover, wherein the cylinder body is provided with an assembly hole that is arranged in a penetrating manner on both ends and is configured for mounting a hot nozzle, the cylinder body is mounted in the mounting hole, and a cooling cavity is formed between the cylinder body and a wall of the mounting hole; and the end cover is provided with a mounting via, the end cover is detachably mounted at one end of the cylinder body, and the mounting via is in communication with the assembly hole.

Description

Hot nozzle cooling cylinder and injection mold

This application claims the priority of the Chinese patent application filed with the China Patent Office on November 3, 2022, with application number 202211372368.1 and invention name “Hot nozzle cooling cylinder and injection mold”, the entire contents of which are incorporated by reference in this application.

Technical Field

The present application relates to the field of mold technology, and in particular to a hot nozzle cooling cylinder and an injection mold.

Background technique

An injection mold is a mold used for plastic injection molding, which usually includes a mold body used to form an injection cavity. The mold body includes a movable mold and a fixed mold. After the movable mold and the fixed mold are molded together, an injection cavity is formed inside. Generally, a hot nozzle is provided on the fixed mold, and molten plastic is injected into the cavity through the hot nozzle. In order to avoid local high temperature in the hot nozzle and gate to affect the molding quality of the product, some injection molds currently have a cooling cylinder outside the hot nozzle, so that a cooling water channel is formed between the cooling cylinder and the fixed mold plate to avoid the hot nozzle being too high. The cooling cylinder will wear out during use. At present, the cooling cylinder is generally replaced as a whole, which has high maintenance costs.

technical problem

The main purpose of the present application is to provide a hot nozzle cooling cylinder, aiming to reduce the production and maintenance costs of the hot nozzle cooling cylinder.

Technical Solutions

To achieve the above-mentioned purpose, the hot nozzle cooling cylinder proposed in the present application is used in an injection mold, the injection mold is provided with a cooling water channel and a mounting hole connected to the cooling water channel, the mounting hole is connected to the cavity of the injection mold, the hot nozzle cooling cylinder comprises a cylinder body and an end cover, the cylinder body is provided with an assembly hole, the assembly hole is through-set at both ends, the assembly hole is provided for the installation of the hot nozzle, the cylinder body is installed in the mounting hole, and a cooling cavity is formed between the cylinder body and the hole wall of the mounting hole; the end cover is provided with an installation through hole, the end cover is detachably mounted on one end of the cylinder body, and the installation through hole is connected to the assembly hole.

Optionally, a plurality of water retaining portions are provided on the outer periphery of the cylinder, and the plurality of water retaining portions extend along the circumference of the cylinder and are spaced apart on the circumference of the cylinder. When the cylinder is installed in the mounting hole, the water retaining portions are arranged to abut against the hole wall of the mounting hole, so that the portion between any two adjacent water retaining portions on the cylinder forms the cooling cavity with the hole wall of the mounting hole.

Optionally, the radial dimension of the end cover is smaller than the radial dimension of the cylinder. When the cylinder is installed in the mounting hole, the end cover is configured to form a guide cavity with the hole wall of the mounting hole, any two adjacent cooling cavities are separated by the water retaining portion, and a plurality of cooling cavities are connected to the guide cavity.

Optionally, an end surface of the end cover is formed with an abutment portion and an arc portion, the abutment portion is arranged around the mounting through hole, and the arc portion is connected to the periphery of the abutment portion and is arranged around the abutment portion.

Optionally, the portion between any two adjacent water retaining parts on the cylinder has a first step surface and a second step surface, the first step surface is located on the side of the second step surface close to the end cover and passes through the end surface of the cylinder, and the second step surface is protruding compared to the first step surface.

Optionally, the end cover has a connecting portion inserted into the assembly port, and a first annular groove is provided on the surface of the connecting portion. The first annular groove is arranged around the connecting portion, and the hot nozzle cooling cylinder also includes a first sealing ring, which is installed in the first annular groove to seal the gap between the connecting portion and the cylinder body.

Optionally, the assembly hole is provided with an internal thread, and the connecting portion is provided with an external thread matching the internal thread so as to be screwed to the cylinder.

Optionally, the cylinder includes a cylinder body and a fixing flange, one end of the cylinder body is detachably connected to the end cover, and the other end of the cylinder body is detachably connected to the fixing flange.

The present application also proposes an injection mold, which includes a mold body, a hot nozzle and a hot nozzle cooling cylinder, the mold body is provided with a cooling water channel and a mounting hole connected to the cooling water channel, the mounting hole is connected to the cavity of the mold body, the hot nozzle cooling cylinder includes a cylinder body and an end cover, the cylinder body is provided with an assembly hole, the assembly hole is through-set at both ends, the end cover is provided with an installation through hole, the end cover is detachably mounted on one end of the cylinder body, the installation through hole is connected to the assembly hole; the hot nozzle cooling cylinder is installed in the mounting hole, and a cooling cavity is formed between the cylinder body of the hot nozzle cooling cylinder and the hole wall of the mounting hole, and the hot nozzle is installed in the assembly hole of the hot nozzle cooling cylinder.

Optionally, the cooling water circuit includes a water inlet and a water outlet formed on the wall of the mounting hole, and the water inlet and the water outlet are arranged on opposite sides of the mounting hole and are both arranged toward the side of the cylinder body of the hot nozzle cooling cylinder.

Beneficial Effects

The technical solution of the present application connects the barrel and the end cover of the hot nozzle cooling barrel in a detachable manner, so that when the end cover is worn or damaged, only the end cover needs to be replaced, and the whole hot nozzle cooling barrel is not needed, which can reduce the maintenance cost of the injection mold. In addition, the barrel and the end cover can be formed separately and then assembled and fixed. Compared with the hot nozzle cooling barrel formed in one piece, this can reduce the manufacturing difficulty of the hot nozzle cooling barrel, thereby reducing the production cost of the hot nozzle cooling barrel and improving practicality.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

FIG1 is a schematic structural diagram of an embodiment of a hot nozzle cooling cylinder of the present application.

FIG. 2 is an exploded view of the hot nozzle cooling cylinder in FIG. 1 .

FIG3 is a cross-sectional view of a hot nozzle cooling cylinder and a portion of a mold body in an embodiment of an injection mold of the present application.

FIG4 is a partial cross-sectional view taken along line A-A in FIG3 .

Explanation of the accompanying drawings: 10, hot nozzle cooling cylinder; 101, cooling chamber; 102, guide chamber; 11, cylinder; 111, cylinder body; 112, fixing flange; 113, assembly hole; 114, water retaining part; 115, first step surface; 116, second step surface; 12, end cover; 121, mounting hole; 122, abutting part; 123, arc-shaped part; 124, connecting part; 125, first annular groove; 20, mold body; 21, water inlet; 22, water outlet; 23, mounting hole.

Embodiments of the present application

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The present application proposes a hot nozzle cooling cylinder, which is used in an injection mold. The injection mold is provided with a cooling water channel and a mounting hole connected to the cooling water channel, and the mounting hole is connected to the cavity of the injection mold. Specifically, the injection mold includes a mold body and a hot nozzle, and the mold body is provided with a cooling water channel and a mounting hole.

In the embodiment of the present application, as shown in Figures 1 to 4, the hot nozzle cooling cylinder 10 includes a cylinder body 11 and an end cover 12. The cylinder body 11 is provided with an assembly hole 113. The assembly hole 113 is through-set at both ends. The assembly hole 113 is provided for the installation of the hot nozzle. The cylinder body 11 is installed in the installation hole 23, and a cooling cavity 101 is formed between the cylinder body 11 and the hole wall of the installation hole 23; the end cover 12 is provided with an installation through hole 121. The end cover 12 is detachably installed at one end of the cylinder body 11, and the installation through hole 121 is connected to the assembly hole 113.

Specifically, when the hot nozzle cooling cylinder 10 is installed in the mounting hole 23, the cylinder body 11 of the hot nozzle cooling cylinder 10 is spaced from the hole wall of the mounting hole 23 to form a cooling cavity 101, and the cooling cavity 101 is connected to the cooling water path on the mold body 20, and the hot nozzle is installed in the assembly hole 113 of the hot nozzle cooling cylinder 10, and the hot nozzle is extended from the mounting hole 121 or the plastic in the hot nozzle flows from the mounting hole 121 to the cavity. Therefore, during injection molding, the heat of the hot nozzle can be transferred to the hot nozzle cooling cylinder 10, and when the cooling water flows through the cooling cavity 101, the heat on the hot nozzle cooling cylinder 10 can be taken away, thereby achieving heat dissipation of the hot nozzle.

The technical solution of the present application makes the barrel 11 and the end cover 12 of the hot nozzle cooling barrel 10 detachably connected, so that when the end cover 12 is worn or damaged, only the end cover 12 needs to be replaced, and the whole hot nozzle cooling barrel 10 is not needed, which can reduce the maintenance cost of the injection mold. In addition, the barrel 11 and the end cover 12 can be formed separately and then assembled and fixed. Compared with the hot nozzle cooling barrel 10 formed in one piece, this can reduce the manufacturing difficulty of the hot nozzle cooling barrel 10, thereby reducing the production cost of the hot nozzle cooling barrel 10 and improving practicality.

In some embodiments, a plurality of water retaining portions 114 are provided on the outer periphery of the cylinder 11, and the plurality of water retaining portions 114 extend along the circumference of the cylinder 11 and are spaced apart in the circumference of the cylinder 11. When the cylinder 11 is installed in the mounting hole 23, the water retaining portions 114 are arranged to abut against the hole wall of the mounting hole 23, so that the portion between any two adjacent water retaining portions 114 on the cylinder 11 forms a cooling cavity 101 with the hole wall of the mounting hole 23. Specifically, when the cylinder 11 is installed in the mounting hole 23 to form a plurality of cooling cavities 101, the plurality of cooling cavities 101 are all connected to the cooling waterway, that is, the water in the cooling waterway can flow through each cooling cavity 101 and then flow out. A flow guide cavity 102 is formed between the end cover 12 and the hole wall of the mounting hole 23, and any two adjacent cooling cavities 101 are separated by the water retaining portion 114, and the plurality of cooling cavities 101 are all connected to the flow guide cavity 102.

The cooling water circuit includes a water inlet 21 and a water outlet 22 formed on the hole wall of the mounting hole 23. The water inlet 21 and the water outlet 22 are arranged on opposite sides of the mounting hole 23 and are both arranged toward the side of the cylinder 11, that is, the water inlet 21 is toward one of the cooling chambers 101, and the water outlet 22 is toward the other cooling chamber 101. In this way, after the cooling water enters the corresponding cooling chamber 101 from the water inlet 21, it can flow from the cooling chamber 101 to the guide chamber 102. Under the action of water pressure, the cooling water in the guide chamber 102 is diverted to each cooling chamber 101. When entering the cooling chamber 101 connected to the water outlet 22, the water in the cooling chamber 101 can be discharged from the water outlet 22. With the continuous injection of cooling water, under the action of water pressure, the cooling water in the remaining cooling chambers (the water inlet 21 corresponds to the cooling chamber 101 and the water outlet 22 corresponds to other cooling chambers 101 outside the cooling chamber 101) can be continuously exchanged with the guide chamber 102, and the cooling water can eventually flow out from the water outlet 22, which can prevent the generation of dead water in the cooling chamber 101, thereby continuously causing heat to the hot nozzle and the hot nozzle cooling cylinder 10. By adjusting the water inlet and water flow rate of the cooling water circuit, heat regulation can be achieved to avoid excessive heat affecting the product molding quality.

Such arrangement makes each cooling cavity 101 independent of each other, and the water inlet 21 and the water outlet 22 are arranged on opposite sides of the hot nozzle cooling cylinder 10, and each is arranged toward a cooling cavity 101. When the cooling water is injected through the water inlet 21, the cooling water first enters the cooling cavity 101 corresponding to the water inlet 21, then flows into the guide cavity 102 from the cooling cavity 101, and finally is diverted from the guide cavity 102 to the remaining cooling cavities 101, and the cooling water after absorbing the heat flows out from the cooling cavity 101 and the water outlet 22 on the other side. In this way, the water flow path between the water inlet 21 and the water outlet 22 is longer, which increases the retention time of the cooling water at the hot nozzle cooling cylinder 10, allowing the cooling water to have enough time to absorb the heat on the hot nozzle, thereby improving the cooling efficiency. In addition, this also makes the water temperature of the cooling water entering each cooling cavity 101 from the guide cavity 102 closer, so that the heat dissipation around the hot nozzle cooling cylinder 10 is more uniform, which is conducive to improving the heat dissipation effect. Optionally, a plurality of water retaining portions 114 are evenly spaced and distributed in the circumferential direction of the cylinder 11 , so that the sizes of the cooling cavities 101 are comparable, the heat dissipation effect is uniform, and the molding is also facilitated.

Of course, in other embodiments, multiple cooling chambers 101 may be connected in sequence in a chain, and the cooling chamber 101 at the first section is connected to the water inlet 21, and the cooling chamber 101 at the tail end is connected to the water outlet 22, so that the cooling water flows through all cooling chambers 101 in sequence and then flows out from the water outlet 22. Alternatively, multiple cooling chambers 101 are connected end to end in sequence, and the two ports of each cooling chamber 101 are staggered, and the water inlet 21 and the water outlet 22 are arranged on opposite sides of the mounting hole 23, so that the cooling water entering from the water inlet 21 flows to the water outlet 22 in two ways. In addition, in other embodiments, an annular groove may be provided on the outer circumference of the cylinder 11, and the annular groove and the hole wall of the mounting hole 23 enclose the cooling chamber 101. Or the outer circumference of the cylinder 11 is spaced from the hole wall of the mounting hole 23 to form the cooling chamber 101.

In some embodiments, six water retaining parts 114 are provided on the outer circumference of the cylinder 11, and the six water retaining parts 114 are evenly spaced and distributed in the circumference of the cylinder 11, that is, the number of cooling chambers 101 is six. Such an arrangement can make the contact area between the cylinder 11 and the hole wall of the mounting hole 23 large, and the installation stability is high. It can also make the chamber capacity larger, and can accommodate more cooling water, thereby improving the heat dissipation effect. And such a symmetrical arrangement can make the distance between the cooling chamber 101 corresponding to the water inlet 21 and the cooling chamber 101 corresponding to the water outlet 22 longer, so that the water flow path between the water inlet 21 and the water outlet 22 is longer, and the retention time of the cooling water at the hot nozzle cooling cylinder 10 is increased. Of course, in other embodiments, the number of water retaining parts 114 can also be 4, or 8, etc.

In some embodiments, the radial dimension of the end cover 12 is smaller than the radial dimension of the cylinder 11, and the end surface of the end cover 12 is formed with an abutment portion 122 and an arc portion 123, the abutment portion 122 is arranged around the mounting hole 121, and the arc portion 123 is connected to the periphery of the abutment portion 122 and arranged around the abutment portion 122. When the cylinder 11 is installed in the mounting hole 23, the circumference of the end cover 12 and the hole wall of the mounting hole 23 and the arc portion 123 and the hole wall of the mounting hole 23 jointly form a guide cavity 102. Such a configuration makes the size of the guide cavity 102 larger, which can increase the water flow of the cooling water and improve the heat exchange effect. Of course, in other embodiments, the guide cavity 102 can also be formed only between the circumference of the end cover 12 and the hole wall of the mounting hole 23, or only between the arc portion 123 and the hole wall of the mounting hole 23.

In some embodiments, the portion between any two adjacent water retaining portions 114 on the cylinder 11 has a first step surface 115 and a second step surface 116. The first step surface 115 is located on the side of the second step surface 116 close to the end cover 12 and is arranged to penetrate the end surface of the cylinder 11. The second step surface 116 is arranged to protrude compared to the first step surface 115. Specifically, when the hot nozzle cooling cylinder 10 is installed in the mounting hole 23, the distance between the first step surface 115 and the hole wall of the mounting hole 23 is greater than the distance between the second step surface 116 and the hole wall of the mounting hole 23, so that the space at the first step surface 115 is larger than the space at the second step surface 116. The water inlet 21 and the water outlet 22 are both arranged toward the second step surface 116. When the cooling water enters the cooling cavity 101 from the water inlet 21 and flows from the second step surface 116 to the first step surface 115, the water flow can be slowed down, the water pressure can be reduced, and the heat of the hot nozzle cooling cylinder 10 can be better taken away. When the cooling water flows out of the cooling cavity 101 corresponding to the water outlet 22 , the cooling water flows from the first step surface 115 to the second step surface 116 , and the flow rate toward the water outlet 22 can be increased to quickly flow out of the cooling cavity 101 .

In some embodiments, the end cover 12 has a connection portion 124 inserted into the assembly port, and a first annular groove 125 is provided on the surface of the connection portion 124, and the first annular groove 125 is arranged around the connection portion 124. The hot nozzle cooling cylinder 10 also includes a first sealing ring, which is installed in the first annular groove 125 to seal the gap between the connection portion 124 and the cylinder body 11. Such an arrangement can facilitate the disassembly of the end cover 12 while achieving a good sealing effect between the end cover 12 and the connection portion 124, and can effectively prevent the water in the cooling cavity 101 from flowing into the hot nozzle cooling cylinder 10.

In some embodiments, the assembly hole 113 is provided with an internal thread, and the connecting portion 124 is provided with an external thread matching the internal thread to be screwed to the cylinder 11. Such a configuration can facilitate the assembly and disassembly of the end cover 12 while making the installation of the end cover 12 stable.

In some embodiments, the barrel 11 includes a barrel body 111 and a fixed flange 112, one end of the barrel body 111 is detachably connected to the end cover 12, and the other end is detachably connected to the fixed flange 112. That is, the fixed flange 112, the barrel 11 and the end cover 12 are mutually detachable, so that when one of them is worn or damaged, only the corresponding part needs to be replaced, and the entire hot nozzle cooling barrel 10 is not required, which can reduce the maintenance cost of the injection mold. In addition, the fixed flange 112, the barrel 11 and the end cover 12 can be formed separately and then assembled and fixed. Compared with the integrally formed hot nozzle cooling barrel 10, the structure of the fixed flange 112, the barrel 11 and the end cover 12 is relatively simple and easy to form, which can reduce the manufacturing difficulty of the hot nozzle cooling barrel 10, thereby reducing the production cost of the hot nozzle cooling barrel 10 and improving practicality.

In some embodiments, a second annular groove is provided on the side of the fixed flange 112 facing the mold body 20, and the first annular groove 125 is arranged around the cylinder body 111. The hot nozzle cooling cylinder 10 also includes a second sealing ring, which is installed in the second annular groove. When the hot nozzle cooling cylinder 10 is installed on the mold body 20, the second sealing ring is used to seal the gap between the fixed flange 112 and the mold body 20.

The present application also proposes an injection mold, which includes a mold body 20, a hot nozzle and a hot nozzle cooling cylinder 10. The specific structure of the hot nozzle cooling cylinder 10 refers to the above embodiment. Since the present injection mold adopts all the technical solutions of all the above embodiments, it at least has all the technical effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the mold body 20 is provided with a cooling water channel and a mounting hole 23 connected to the cooling water channel. The mounting hole 23 is connected to the cavity of the mold body 20. The hot nozzle cooling cylinder 10 is installed in the mounting hole 23, and a cooling cavity 101 is formed between the hot nozzle cooling cylinder 10 and the hole wall of the mounting hole 23. The hot nozzle is installed in the assembly hole 113 of the hot nozzle cooling cylinder 10.

Specifically, the mold body 20 includes a movable mold part and a fixed mold part, which together enclose a cavity. The fixed mold part is provided with a mounting hole 23 and a cooling water channel, that is, the hot nozzle and the hot nozzle cooling cylinder 10 are installed in the fixed mold part.

The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly/indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

A hot nozzle cooling cylinder is used in an injection mold, wherein the injection mold is provided with a cooling water channel and a mounting hole connected to the cooling water channel, and the mounting hole is connected to the cavity of the injection mold, wherein the hot nozzle cooling cylinder comprises a cylinder body and an end cover, the cylinder body is provided with an assembly hole, the assembly hole is through-set at both ends, the assembly hole is provided for the installation of the hot nozzle, the cylinder body is installed in the mounting hole, and a cooling cavity is formed between the cylinder body and the hole wall of the mounting hole; the end cover is provided with an installation through hole, the end cover is detachably mounted on one end of the cylinder body, and the installation through hole is connected to the assembly hole.
The hot nozzle cooling cylinder as described in claim 1, wherein a plurality of water retaining portions are provided on the outer periphery of the cylinder, the plurality of water retaining portions all extend along the circumference of the cylinder and are spaced apart on the circumference of the cylinder, and when the cylinder is installed in the mounting hole, the water retaining portion is arranged to abut against the hole wall of the mounting hole, so that the portion between any two adjacent water retaining portions on the cylinder forms the cooling cavity with the hole wall of the mounting hole.
The hot nozzle cooling cylinder as described in claim 2, wherein the radial dimension of the end cover is smaller than the radial dimension of the cylinder body, and when the cylinder body is installed in the mounting hole, the end cover is configured to form a guide cavity with the hole wall of the mounting hole, and any two adjacent cooling cavities are separated by the water retaining portion, and a plurality of the cooling cavities are connected to the guide cavity.
The hot nozzle cooling cylinder as described in claim 3, wherein the end surface of the end cover is formed with an abutment portion and an arc portion, the abutment portion is arranged around the mounting through hole, and the arc portion is connected to the periphery of the abutment portion and is arranged around the abutment portion.
The hot nozzle cooling cylinder as described in claim 1, wherein the portion between any two adjacent water retaining portions on the cylinder body has a first step surface and a second step surface, the first step surface is located on the side of the second step surface close to the end cover and is arranged through the end surface of the cylinder body, and the second step surface is arranged to protrude compared to the first step surface.
The hot nozzle cooling cylinder as described in claim 1, wherein the end cover has a connecting portion inserted into the assembly port, a first annular groove is provided on the surface of the connecting portion, the first annular groove is arranged around the connecting portion, and the hot nozzle cooling cylinder also includes a first sealing ring, which is installed in the first annular groove to seal the gap between the connecting portion and the cylinder body.
The hot nozzle cooling cylinder according to claim 6, wherein the assembly hole is provided with an internal thread, and the connecting portion is provided with an external thread matching the internal thread so as to be screwed to the cylinder body.
The hot nozzle cooling cylinder according to claim 1, wherein the cylinder body comprises a cylinder body and a fixing flange, one end of the cylinder body is detachably connected to the end cover, and the other end is detachably connected to the fixing flange.
An injection mold, comprising a mold body, a hot nozzle and a hot nozzle cooling cylinder, the mold body being provided with a cooling water channel and a mounting hole connected to the cooling water channel, the mounting hole being connected to the cavity of the mold body, the hot nozzle cooling cylinder comprising a cylinder body and an end cover, the cylinder body being provided with an assembly hole, the assembly hole being through-set at both ends, the end cover being provided with an installation through hole, the end cover being detachably mounted on one end of the cylinder body, the installation through hole being connected to the assembly hole; the hot nozzle cooling cylinder being mounted in the mounting hole, and a cooling cavity being formed between the cylinder body of the hot nozzle cooling cylinder and the hole wall of the mounting hole, the hot nozzle being mounted in the assembly hole of the hot nozzle cooling cylinder.
The injection mold as described in claim 9, wherein the cooling water circuit includes a water inlet and a water outlet formed on the wall of the mounting hole, and the water inlet and the water outlet are respectively arranged on opposite sides of the mounting hole and are both arranged toward the side of the barrel of the hot nozzle cooling barrel.