CN220534856U - Water-proof sheet for plastic mould cooling device and plastic mould cooling device - Google Patents

Abstract

The application discloses a water proof piece and plastic mould cooling device for plastic mould cooling device to solve current water proof piece time and energy when the installation location, effect are not good and processing difficulty, problem that manufacturing cost is high. The water-proof sheet is of a strip-shaped flat structure, two sides of the water-proof sheet in the width direction are respectively provided with a positioning wing, two positioning grooves are formed in the position, corresponding to the position where the water-proof sheet is installed, of the cooling channel, and the cooling channel is connected with the water-proof sheet in an interference fit mode; when the waterproof sheet is used, according to the arrangement position of the cooling channel in the plastic mold, two positioning grooves are formed in the position, where the waterproof sheet needs to be installed, in the cooling channel, and then the waterproof sheet and the cooling channel are mutually embedded to complete the installation and positioning of the waterproof sheet; the device has the advantages of simple structure, convenient installation and positioning, high production efficiency, stable and accurate size; meanwhile, the waterproof sheet is made of plastic resin, is not easy to rust, is low in cost and long in service life, and is easy to manufacture.

Description

Water-proof sheet for plastic mould cooling device and plastic mould cooling device

Technical Field

The application relates to the technical field of plastic molds, in particular to a water-proof sheet for a plastic mold cooling device and the plastic mold cooling device.

Background

The plastic injection molding mold is a tool for producing plastic products. The device consists of several parts, including upper and lower dies, ejector and forming cavity between the upper and lower dies. During injection molding, the mold is clamped on the injection molding machine, molten plastic is injected into the molding cavity, and the molten plastic is cooled and shaped in the cavity.

In the existing plastic mold, when the mold is cooled, a water cooling mode is generally adopted, and for products (plastics) with different height and fluctuation, a water-proof sheet is required to be arranged at a cooling channel of the mold for drainage. At present, the water-proof sheets used in the market are time-consuming and labor-consuming in installation and positioning, have poor effect, and the two sides of the water-proof sheets easily form a gap with a cooling channel of a die, so that water flows out of the gap, and the drainage effect is poor; meanwhile, the water-proof sheet is made of traditional metal copper, aluminum, iron and other materials, when in use, the water-proof sheet made of metal needs to be cut off, a semicircle is punched at the end part of the water-proof sheet, then the water-proof sheet is arranged in a cooling channel of a die, if the height of the water-proof sheet after being arranged is higher than that of the die, the raised part needs to be polished and cut, and the water-proof sheet has the defects of difficult processing, complex process, high production cost, easy embroidering and short service life, and can not be in a complex shape to guide water flow.

Disclosure of Invention

For this reason, this application provides a water proof piece and plastic mould cooling device for plastic mould cooling device to solve current water proof piece and waste time and energy, effect are not good and processing difficulty, problem that manufacturing cost is high when the installation location.

In order to achieve the above object, the present application provides the following technical solutions:

in a first aspect, a water-proof sheet for a cooling device of a plastic mold, the water-proof sheet is disposed in a cooling channel of the plastic mold, the water-proof sheet is in a strip-shaped flat structure, two sides of the water-proof sheet along a width direction are respectively provided with a positioning wing, and two positioning wings are located at one end of the water-proof sheet along a length direction; the cooling channel is provided with positioning grooves corresponding to the two positioning wings, and the cooling channel is connected with the two lateral surfaces of the water-proof sheet in the width direction in an interference fit mode.

Optionally, a plurality of cross bars which are distributed up and down in sequence are respectively arranged on the water-proof sheet, which is close to one end of the positioning wing and corresponds to two sides of the positioning wing along the thickness direction.

Optionally, a plurality of reinforcing ribs are further arranged on the waterproof sheet and below the cross rod.

Optionally, the reinforcing ribs are respectively crossed in pairs and distributed up and down.

Optionally, the material of the waterproof sheet is plastic resin.

In a second aspect, a cooling device for a plastic mold includes a plastic mold, wherein at least one cooling channel is arranged in the plastic mold, each cooling channel is provided with at least one water-proof sheet, and the water-proof sheets are the water-proof sheets;

the cooling channels comprise a plurality of communicated vertical channels and transverse channels, and the water-proof sheets are arranged in at least one vertical channel.

Optionally, the number of the cooling channels is two, one cooling channel is a linear cooling channel, and the other cooling channel is a vertical cooling channel;

the plastic mold comprises a mold frame and a mold core, wherein two water inlets and two water outlets corresponding to the linear cooling channel and the vertical cooling channel are respectively arranged on the mold frame.

Optionally, the linear cooling channel comprises a first vertical channel in the mold core, and a first water-proof sheet is arranged in the first vertical channel;

the lower end of the first vertical channel is positioned on the lower end surface of the die core, the upper end of the first vertical channel extends into the die core, and a first interval for water flow to pass through is reserved at the deepest part of the first water-proof sheet and the first vertical channel; two first positioning grooves are symmetrically arranged at the lower end face of the die core corresponding to the first water-proof sheet, and the first vertical channel is connected with two side faces of the first water-proof sheet in the width direction in an interference fit mode; the first water-proof sheet is perpendicular to the water flow direction of the linear cooling channel.

Optionally, the vertical cooling channel comprises a second vertical channel in the mold core, a first transverse channel and a second transverse channel which are vertical to the second vertical channel, and a second water-proof sheet is arranged in the second vertical channel;

the upper part of the first vertical channel is positioned on the lower end surface of the die core, the upper end of the first vertical channel extends into the die core, and a second interval for water flow to pass through is reserved at the deepest part of the second water-proof sheet and the second vertical channel; two second positioning grooves are symmetrically arranged at the lower end face of the die core corresponding to the positions of the second water-proof sheets, and the second vertical channels are connected with the two side faces of the second water-proof sheets in the width direction in an interference fit mode; the second waterproof sheet forms an included angle of 45 degrees with the first transverse channel and the second transverse channel.

Optionally, the die carrier is connected with the die core through a screw;

and a sealing ring is arranged between the die frame and the die core at a position corresponding to the vertical channel.

Compared with the prior art, the application has the following beneficial effects:

1. the application provides a water-proof sheet for a plastic mold cooling device, wherein the water-proof sheet is of a strip-shaped flat structure, two sides of the water-proof sheet along the width direction are respectively provided with a positioning wing, two positioning grooves are formed in a cooling channel corresponding to the position where the water-proof sheet is installed, and the cooling channel is connected with the water-proof sheet in an interference fit mode; when the waterproof sheet is used, according to the arrangement position of the cooling channel in the plastic mold, two positioning grooves are formed in the position, where the waterproof sheet needs to be installed, in the cooling channel, and then the waterproof sheet and the cooling channel are mutually embedded to complete the installation and positioning of the waterproof sheet; the device has the advantages of simple structure, convenient installation and positioning, high production efficiency, stable and accurate size;

meanwhile, the waterproof sheet adopts plastic resin to replace the traditional waterproof sheet made of metal materials such as copper, aluminum and the like, is difficult to rust, low in cost and long in service life, the shape of the waterproof sheet is easier to manufacture, and the waterproof sheet can be made more complicated, so that the purpose of guiding water flow in a specific shape is easier to achieve.

2. The utility model provides a be close to the one end of locating wing on the water proof piece and be provided with many horizontal poles that distribute from top to bottom in proper order respectively corresponding to its both sides along thickness direction, the frictional force in this position has been increased in the setting of horizontal pole, takes when being convenient for water proof piece installation.

3. The utility model provides a still be provided with many strengthening ribs corresponding to the below of horizontal pole on the water proof piece, the intensity of water proof piece has been strengthened in the setting of strengthening rib, avoids water proof piece to take place to warp, has further improved water proof piece's life.

4. The application also provides a plastic mold cooling device, which comprises a plastic mold, wherein at least one cooling channel is arranged in the plastic mold, each cooling channel is provided with at least one water-proof sheet, and the water-proof sheets are the water-proof sheets for the plastic mold cooling device; the cooling channel comprises a plurality of vertical channels and transverse channels which are communicated, and the water-proof sheet is arranged in at least one vertical channel; the cooling channels comprise linear cooling channels and vertical cooling channels; when the vertical channel of the linear cooling channel is provided with the water-proof sheet, the water-proof sheet is vertical to the water flow direction of the linear cooling channel; when the vertical channel of the vertical cooling channel is provided with the water-proof sheet, the first transverse channel and the second transverse channel which are vertical to the vertical channel of the second water-proof sheet are all 45-degree included angles so as to ensure the purpose of guiding water flow.

Drawings

For a more visual illustration of the prior art and the present application, several exemplary drawings are presented below. It should be understood that the specific shape and configuration shown in the drawings should not be considered in general as limiting upon the practice of the present application; for example, based on the technical concepts and exemplary drawings disclosed herein, those skilled in the art have the ability to easily make conventional adjustments or further optimizations for the add/subtract/assign division, specific shapes, positional relationships, connection modes, dimensional scaling relationships, etc. of certain units (components).

Fig. 1 is a schematic structural view of a water-blocking sheet according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a water-blocking sheet according to an embodiment of the present disclosure;

FIG. 3 is a front view of the device shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a cooling device for plastic molds according to an embodiment of the present disclosure;

FIG. 5 is an exploded view of a mold frame and a mold insert according to one embodiment of the present disclosure;

FIG. 6 is a bottom schematic view of the mold insert shown in FIG. 5;

FIG. 7 is a cross-sectional view of the mold insert shown in FIG. 6;

FIG. 8 is a transverse cross-sectional view as shown in FIG. 4;

FIG. 9 is a longitudinal cross-sectional view I shown in FIG. 4;

FIG. 10 is a partial schematic view of the view shown in FIG. 9;

FIG. 11 is a partial schematic view of the view shown in FIG. 8;

FIG. 12 is a second longitudinal cross-sectional view of the device shown in FIG. 4;

fig. 13 is a longitudinal cross-sectional view III shown in fig. 4.

Reference numerals illustrate:

1. a plastic mold; 11. a mould frame; 12. a mold core; 121. a positioning groove; 13. a water inlet; 131. a first water inlet; 132. a second water inlet; 14. a water outlet; 141. a first water outlet; 142. a second water outlet; 15. a linear cooling channel; 151. a third transverse channel; 1511. a first down leg; 152. a fourth transverse channel; 1521. a second down leg; 1522. a third down leg; 153. a first vertical channel; 154. a third vertical channel; 155. a fifth transverse channel; 1551. a first upper branch conduit; 1552. a second upper branch pipe; 16. a vertical cooling channel; 161. a second vertical channel; 162. a first transverse channel; 163. a second transverse channel; 17. a first pitch; 18. a second pitch; 19. a third pitch;

2. a water barrier sheet; 21. positioning wings; 22. a cross bar; 23. reinforcing ribs; 24. a circular arc surface; 201. a first water barrier sheet; 202. a second water barrier sheet; 203. a third water barrier sheet; 204. a fourth water-blocking sheet; 205. a fifth water-blocking sheet;

3. and (3) sealing rings.

Detailed Description

The present application is further described in detail below with reference to the attached drawings.

In the description of the present application: unless otherwise indicated, the meaning of "a plurality" is two or more. The terms "first," "second," "third," and the like in this application are intended to distinguish between the referenced objects without a special meaning in terms of technical connotation (e.g., should not be construed as emphasis on degree or order of importance, etc.). The expressions "comprising", "including", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

The terms such as "upper", "lower", "left", "right", "middle", and the like, as referred to in this application, are generally used for convenience in visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in actual products. Such changes in relative positional relationship are considered to be within the scope of the present description without departing from the technical concepts disclosed herein.

In one embodiment of the present application, as shown in fig. 1-7, a water-proof sheet for a cooling device of a plastic mold, wherein a water-proof sheet 2 is disposed in a cooling channel of the plastic mold 1, the water-proof sheet 2 is in a strip-shaped flat structure, two sides of the water-proof sheet along a width direction are respectively provided with a positioning wing 21, and two positioning wings 21 are located at one end of the water-proof sheet 2 along a length direction; the cooling channel is provided with positioning grooves 121 corresponding to the two positioning wings 21 at positions corresponding to the positions where the water-proof sheets 2 are arranged, and the cooling channel is connected with the water-proof sheets 2 in an interference fit mode.

Preferably, a plurality of cross bars 22 are respectively arranged on the water-proof sheet 2 near one end of the positioning wing 21 and corresponding to two sides of the positioning wing along the thickness direction, and the cross bars are sequentially distributed up and down.

The provision of the cross bar 22 increases the friction at this location, facilitating the handling of the spacer 2 during installation.

Preferably, a plurality of reinforcing ribs 23 are further provided on the waterproof sheet 2 corresponding to the lower portions of the cross bars 22.

Further preferably, the plurality of reinforcing ribs 23 are arranged to intersect one another and to be vertically distributed.

The strength of the water-proof sheet 2 is enhanced by the arrangement of the reinforcing ribs 23, the water-proof sheet 2 is prevented from deforming, and the service life of the water-proof sheet 2 is further prolonged.

Still further preferably, the lower portions of the two sides of the water-proof sheet 2 in the width direction corresponding to the positioning wings 21 are circular arc surfaces 24, which are mutually attached to the inner wall of the cylindrical cooling channel, and the diameter of the positioning wings 21 of the circular arc surfaces 24 is slightly larger than the diameter of the inner wall of the cylindrical cooling channel, so that interference fit is achieved at the attaching position.

Preferably, the material of the water barrier sheet 2 is plastic resin.

When the waterproof sheet 2 is used, according to the arrangement position of the cooling channel in the plastic mold 1, two positioning grooves 121 corresponding to the positioning wings 21 on two sides of the waterproof sheet 2 are formed in the position, where the waterproof sheet 2 needs to be installed, in the cooling channel, and then the waterproof sheet 2 and the cooling channel are mutually embedded to complete the installation and the positioning of the waterproof sheet 2; the waterproof sheet 2 has the advantages of convenient installation and positioning, high production efficiency and stable and accurate size; meanwhile, the waterproof sheet 2 adopts plastic resin to replace the traditional waterproof sheet 2 made of metal materials such as copper, aluminum and the like, so that the waterproof sheet 2 is difficult to rust, low in cost and long in service life, the shape of the waterproof sheet 2 is easier to manufacture, and the waterproof sheet 2 can be made more complex, and the purpose of guiding water flow in a specific shape is easier to achieve.

As shown in fig. 5-13, the application further provides a cooling device for a plastic mold, which comprises a plastic mold 1, wherein at least one cooling channel is arranged in the plastic mold 1, each cooling channel is provided with at least one water-proof sheet 2, and the water-proof sheet 2 is the water-proof sheet 2 for the cooling device for the plastic mold 1; the cooling channel comprises a plurality of communicated vertical channels and transverse channels, and the water-proof sheet 2 is arranged in at least one vertical channel.

Preferably, as shown in fig. 8, two cooling channels are provided, wherein one cooling channel is a linear cooling channel 15 and the other cooling channel is a vertical cooling channel 16; the plastic mold 1 comprises a mold frame 11 and a mold core 12 sleeved with the mold frame 11, wherein the mold frame 11 is respectively provided with two water inlets 13 and two water outlets 14 corresponding to a linear cooling channel 15 and a vertical cooling channel 16; the outside of plastic mould 1 is provided with water supply equipment, and water supply equipment is connected with water inlet 13, provides the coolant liquid for plastic mould 1.

First, as shown in fig. 9 to 10, the linear cooling passage 15 has the following structure:

the linear cooling channels 15 comprise a third transverse channel 151 in the mould frame 11, a fourth transverse channel 152 in the mould frame 11, a first vertical channel 153 in the mould core 12, a third vertical channel 154 in the mould core 12, and a fifth transverse channel 155 in the mould core 12; the fifth transverse channel 155 is provided with a first upper branch pipe 1551 and a second upper branch pipe 1552, and the lower ends of the two branch pipes are positioned on the lower end face of the die core 12;

a first water-proof sheet 201 is arranged in the first vertical channel 153, the lower end of the first vertical channel 153 is positioned on the lower end face of the die core 12, the upper end of the first vertical channel 153 extends into the die core 12, and a first interval 17 for water flow to pass through is formed between the first water-proof sheet 201 and the deepest part of the first vertical channel 153; the deepest part of the top of the first vertical channel 153 is provided with a concave taper hole, so that cooling water can flow conveniently; two first positioning grooves 121 are symmetrically arranged at the lower end face of the die core 12 corresponding to the positions of the first water-proof sheets 201, the first vertical channels 153 are connected with two side faces of the first water-proof sheets 201 in the width direction in an interference fit mode, the first water-proof sheets 201 are perpendicular to the water flow direction of the linear cooling channels 15, namely, the vertical planes formed by the two first positioning grooves 121 are perpendicular to the water flow direction of the linear cooling channels 15;

one end of the third transverse channel 151 is communicated with the first water inlet 131, a first lower branch pipeline 1511 is arranged at the other end of the third transverse channel 151, and the first lower branch pipeline 1511 is correspondingly communicated with a first upper branch pipeline 1551; one end of the fourth transverse channel 152 is communicated with the first water outlet 141, the other end of the fourth transverse channel 152 is provided with a second lower branch pipeline 1521 and a third lower branch pipeline 1522, and the second lower branch pipeline 1521 is correspondingly communicated with a second upper branch pipeline 1552;

a third water-proof sheet 203 is arranged in the third vertical channel 154, the lower end of the third water-proof sheet 203 is positioned on the lower end surface of the die core 12, the upper end of the third water-proof sheet extends into the die core 12, and a third interval 19 for water flow to pass through exists at the deepest part of the third water-proof sheet 203 and the third vertical channel 154; two positioning grooves 121 are symmetrically arranged at the lower end face of the die core 12 corresponding to the position of the third water-proof sheet 203, the third vertical channel 154 is connected with two lateral sides of the third water-proof sheet 203 in the width direction in an interference fit mode, and the third water-proof sheet 203 is perpendicular to the water flow direction of the linear cooling channel 15, namely the direction of the third water-proof sheet is the same as that of the first water-proof sheet 201; the third lower branch pipe 1522 is communicated with the third vertical channel 154, and the fourth water-proof sheet 204 is arranged in the third lower branch pipe 1522, and the fourth water-proof sheet 204 and the third water-proof sheet 203 have the same orientation and are vertically connected; the bottom end of the fourth riser 204 is in contact with the bottom end of the third down leg 1522.

As shown in fig. 9, the dashed arrows indicate the water flow direction, and the cooling water of the linear cooling channel 15 flows in from the water inlet 13 in the mold frame 11, flows through the third transverse channel 151, the first lower branch channel 1511, the first upper branch channel 1551, the left side of the fifth transverse channel 155, the left side of the first water barrier 201 in the first vertical channel 153, and after crossing from the top of the first water barrier 201, flows down from the right side of the first water barrier 201, sequentially through the right side of the fifth transverse channel 155, the second upper branch channel 1552, the second lower branch channel 1521, the left side of the fourth transverse channel 152, flows down from the left side of the fourth water barrier 204 in the third lower branch channel 1522, the left side of the third water barrier 203 in the third vertical channel 154, and after crossing, flows down from the right side of the third water barrier 203 in the third vertical channel 154, the right side of the fourth water barrier 204 in the third lower branch channel 1522, and then flows out from the right side of the water outlet 14.

Second, as shown in fig. 11-13, the vertical cooling channel 16 is structured as follows:

the vertical cooling channel 16 comprises a second vertical channel 161 positioned in the mold core 12, a first transverse channel 162 and a second transverse channel 163 which are vertical to the second vertical channel 161, and a second water-proof sheet 202 is arranged in the second vertical channel 161;

the upper part of the first vertical channel 153 is positioned at the lower end surface of the die core 12, the upper end of the first vertical channel 153 extends into the die core 12, and a second interval 18 for water flow to pass through exists at the deepest part of the second water-proof sheet 202 and the second vertical channel 161; the deepest part of the top of the second vertical channel 161 is provided with a concave taper hole, so that cooling water can flow conveniently; two second positioning grooves 121 are symmetrically arranged at the lower end face of the die core 12 corresponding to the positions of the second water-proof sheets 202, and the second vertical channels 161 are connected with two lateral sides of the second water-proof sheets 202 in the width direction in an interference fit manner; the second waterproof sheet 202 forms an included angle of 45 degrees with the first transverse channel 162 and the second transverse channel 163.

The vertical cooling channel 16 further comprises a fourth vertical channel located in the mold frame 11, the fourth vertical channel and the second vertical channel 161 are located on the same vertical plane, and a fifth water-proof sheet 205 is arranged in the fourth vertical channel.

The cooling water flow direction of the vertical cooling channel 16 is shown in fig. 12 and 13, wherein the dotted arrow indicates the water flow direction, and the cooling water enters from the second water inlet 132 and finally flows out from the second water outlet 142 after flowing in the illustrated (fig. 12 and 13).

Preferably, the die frame 11 and the die core 12 are connected through screws.

Further preferably, sealing rings 3 are arranged between the die frame 11 and the die core 12 at positions corresponding to the vertical channels.

Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.

The foregoing has outlined and detailed description of the present application in terms of the general description and embodiments. It should be appreciated that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but such conventional modifications and further innovations may be made without departing from the technical spirit of the present application, and such conventional modifications and further innovations are also intended to fall within the scope of the claims of the present application.

Claims (10)

1. A water-proof sheet for a plastic mould cooling device, which is arranged in a cooling channel of a plastic mould and is characterized in that,

the waterproof sheet is of a strip-shaped flat structure, two sides of the waterproof sheet in the width direction are respectively provided with a positioning wing, and the two positioning wings are positioned at one end of the waterproof sheet in the length direction; the cooling channel is provided with positioning grooves corresponding to the two positioning wings, and the cooling channel is connected with the two lateral surfaces of the water-proof sheet in the width direction in an interference fit mode.

2. The water-proof sheet for plastic mold cooling device according to claim 1, wherein a plurality of cross bars are respectively arranged on the water-proof sheet near one end of the positioning wing and corresponding to two sides of the positioning wing along the thickness direction, and the cross bars are sequentially distributed up and down.

3. The water-proof sheet for a plastic mold cooling device according to claim 2, wherein a plurality of reinforcing ribs are further arranged on the water-proof sheet and below the cross bar.

4. A water barrier sheet for a plastic mold cooling device according to claim 3, wherein a plurality of the reinforcing ribs are respectively crossed two by two and are distributed up and down.

5. The water-proof sheet for a plastic mold cooling device according to claim 1, wherein the material of the water-proof sheet is plastic resin.

6. A plastic mold cooling device, which is characterized by comprising a plastic mold, wherein at least one cooling channel is arranged in the plastic mold, each cooling channel is provided with at least one water-proof sheet, and the water-proof sheets are the water-proof sheets according to any one of claims 1-5;

the cooling channels comprise a plurality of communicated vertical channels and transverse channels, and the water-proof sheets are arranged in at least one vertical channel.

7. The plastic mold cooling device of claim 6, wherein the number of cooling channels is two, one of the cooling channels is a linear cooling channel, and the other cooling channel is a vertical cooling channel;

the plastic mold comprises a mold frame and a mold core, wherein two water inlets and two water outlets corresponding to the linear cooling channel and the vertical cooling channel are respectively arranged on the mold frame.

8. The plastic mold cooling device of claim 7, wherein the linear cooling channel comprises a first vertical channel in the mold core, wherein a first water-proof sheet is arranged in the first vertical channel;

the lower end of the first vertical channel is positioned on the lower end surface of the die core, the upper end of the first vertical channel extends into the die core, and a first interval for water flow to pass through is reserved at the deepest part of the first water-proof sheet and the first vertical channel; two first positioning grooves are symmetrically arranged at the lower end face of the die core corresponding to the first water-proof sheet, and the first vertical channel is connected with two side faces of the first water-proof sheet in the width direction in an interference fit mode; the first water-proof sheet is perpendicular to the water flow direction of the linear cooling channel.

9. The plastic mold cooling device according to claim 8, wherein the vertical cooling channel comprises a second vertical channel in the mold core, a first transverse channel and a second transverse channel perpendicular to the second vertical channel, and a second water-proof sheet is arranged in the second vertical channel;

the upper part of the first vertical channel is positioned on the lower end surface of the die core, the upper end of the first vertical channel extends into the die core, and a second interval for water flow to pass through is reserved at the deepest part of the second water-proof sheet and the second vertical channel; two second positioning grooves are symmetrically arranged at the lower end face of the die core corresponding to the positions of the second water-proof sheets, and the second vertical channels are connected with the two side faces of the second water-proof sheets in the width direction in an interference fit mode; the second waterproof sheet forms an included angle of 45 degrees with the first transverse channel and the second transverse channel.

10. The cooling device for plastic molds according to claim 8 or 9, wherein the mold frame and the mold core are connected by a screw;

and a sealing ring is arranged between the die frame and the die core at a position corresponding to the vertical channel.