CN222242576U - In-mold spraying device of die casting mold and die casting mold - Google Patents

Abstract

The present application provides a die-casting mold in-mold spraying device and a die-casting mold, and relates to the field of die-casting molds. The die-casting mold in-mold spraying device includes a rear mold component, a telescopic component, an insert pin and a spray component. The rear mold component has a molding cavity for molding products and a feeding channel for conveying a release agent; the telescopic component is connected to the rear mold component, and the insert pin is connected to the telescopic component, and the telescopic component is used to drive the insert pin to extend into or leave the molding cavity; the spray component is installed in the feeding channel; the feeding channel is used to connect to a pressure feeder, and can spray the release agent onto the insert pin in the mold opening position through the spray component. The spray device can adapt to complex mold structures, can fully spray the mold with a release agent, and is not prone to mold pulling when opening the mold, which can improve the molding quality of the product, reduce the scrap rate, and reduce manufacturing costs.

Description

In-mold spraying device of die casting mold and die casting mold

Technical Field

The utility model relates to the field of die casting dies, in particular to an in-die spraying device of a die casting die and the die casting die.

Background

At present, the existing spraying system of the die casting die is simpler, is generally in out-of-die spraying, and can realize full spraying of the die with a simple structure. However, in the case of a mold having a complicated structure, the mold release agent cannot be sprayed from the outside to a part of the mold, which eventually results in drawing of the product, and affects the production cost and the lead time. That is, the prior art spray coating system cannot meet the requirement of products with complex structures, which is not beneficial to industrial production, and there is a need to design an in-mold spray coating system to adapt to the structure and production.

Disclosure of utility model

The utility model aims to provide an in-mold spraying device for a die-casting mold and the die-casting mold, which can realize in-mold spraying, can adapt to complex mold structures, are beneficial to mold opening, are not easy to cause conditions such as mold pulling and the like during mold opening, can improve the molding quality of products, reduce the rejection rate and reduce the manufacturing cost.

Embodiments of the present utility model are implemented as follows:

In a first aspect, the present utility model provides an in-mold spraying device for a die casting mold, comprising:

The device comprises a rear die assembly, a telescopic assembly, an insert pin and a spraying assembly, wherein the rear die assembly is provided with a forming cavity for forming a product and a material conveying channel for conveying a release agent;

The material conveying channel is used for being connected with the press feeder and can spray the release agent onto the insert pin at the die opening position through the spraying assembly.

In an alternative embodiment, the rear die assembly comprises a rear die holder and a rear die core, the rear die holder is provided with a positioning groove, the rear die core is installed in the positioning groove, and the forming cavity is arranged on the rear die core.

Based on the scheme, the rear die assembly is simple in structure and convenient to process and manufacture, and the rear die holder and the rear die core are independently processed and assembled together and can be processed by different materials respectively, so that the processing and manufacturing cost is reduced.

In an alternative embodiment, the rear die holder and the rear die core are both provided with a material conveying channel.

According to the scheme, the material conveying channels are formed in the rear die holder and the rear die core, and the release agent can be conveyed from different material conveying channels according to requirements, so that the release agent is sprayed from different positions, and therefore the release agent is sprayed to corresponding positions of the die, and can be sprayed to a plurality of positions, so that the release is facilitated.

In an alternative embodiment, the telescopic assembly comprises a telescopic device, a first sliding block and a second sliding block, the telescopic device is connected with the rear die holder, the first sliding block is connected with the second sliding block, the insert pin is connected with the first sliding block, the second sliding block is connected with the telescopic device, a material conveying channel located on the rear die core is matched with the insert pin, and a material conveying channel located on the rear die holder is matched with the second sliding block.

Based on the scheme, the first sliding block and the second sliding block are matched together after being independently processed, so that the processing is convenient, and the cost is low. The expansion bend drives the insert pin to move through the first sliding block and the second sliding block, the movement of the insert pin is more stable, and the position of the insert pin is determined through the first sliding block and the second sliding block, so that the insert pin can be precisely matched with the forming cavity, and the improvement of the forming quality of products is facilitated.

In an alternative embodiment, the spray assembly includes a spherical spray head having a spray orifice, the spherical spray head being positioned within the feed channel, the spherical spray head being in movable engagement with the feed channel to adjust the discharge direction of the spray orifice.

Based on the scheme, the structural design of the spherical spray head can adjust the angle of the spherical spray head relative to the material conveying channel after the spherical spray head is installed in the material conveying channel, namely, the angle of the spray opening is adjusted, so that the spray opening can correspond to the part of the mold, which is to be sprayed with the release agent, better, the release agent can accurately reach the mold, the spraying effect is good, the release agent can be saved, and the waste of materials is reduced.

In an alternative embodiment, the spray assembly further comprises a one-way valve mounted within the feed channel, the one-way valve being located behind the spherical spray head, the one-way valve allowing release agent to be sprayed only from the spherical spray head.

Based on the scheme, through setting up the check valve, release agent when being pumped into the material conveying passageway by the pressure conveyer, release agent can pass through the check valve earlier, then enters into spherical shower nozzle, spouts to the mould from spherical shower nozzle. After the release agent is sprayed out, the release agent can not flow back into the material conveying channel from the check valve, and the material conveying channel is not easy to be polluted.

In an alternative embodiment, the one-way valve comprises a fixed sleeve, a supporting sleeve, a spherical valve core and an elastic piece, wherein the supporting sleeve is installed in the fixed sleeve, the spherical spray head is clamped between the supporting sleeve and the fixed sleeve, the supporting sleeve is provided with a limiting step, the spherical valve core is installed at the limiting step, the elastic piece is located between the spherical valve core and the spherical spray head and used for enabling the spherical valve core to have a movement trend close to the limiting step, and the fixed sleeve is installed in the material conveying channel.

Based on the scheme, the check valve is simple in structure, the elastic force of the elastic piece is overcome firstly during spraying, the spherical valve core is pushed away, the hole section at the limiting step is opened, the release agent can be sprayed out from the spraying opening of the spherical spray head, and the release agent can be sprayed out at a certain speed and can be ensured to smoothly move to the position to be sprayed. When the pressure-feed force of the release agent is reduced and insufficient to spray on the die, the spherical valve core is pushed to the limiting step under the action of the elastic piece, the limiting step is blocked, the release agent is not easy to overflow from the spherical spray head, and the waste of materials is reduced.

In an alternative embodiment, the fixing sleeve is provided with an external thread, the material conveying channel is provided with an internal thread, and the external thread is in threaded connection and fixing with the internal thread.

Based on the scheme, the combination mode of the fixed sleeve and the material conveying channel is simple, the operation is convenient, and the assembly and the disassembly are convenient.

In an alternative embodiment, the end of the fixing sleeve is provided with a clamping groove for being matched with a screwdriver.

Based on above-mentioned scheme, through instrument such as screwdriver and joint groove grafting, the application of force can drive fixed cover rotation in the screwdriver to adjust the position of fixed cover, the simple operation.

The embodiment of the utility model has the beneficial effects that:

In summary, the in-mold spraying device for the die casting mold provided in this embodiment, through integrating the spraying component on the rear mold component, when the mold opening action is completed, the spraying component can be used for completing the spraying operation of the release agent on the components such as the insert pin in the mold, that is, the position switch can be set, when the product manufacturing is completed and the mold is opened to the set position, the position switch is triggered, the signal is sent to the press transmitter, the release agent is conveyed to the conveying channel after the press transmitter is started, and then the release agent is sprayed onto the components such as the insert pin from the spraying component, so that the operation of spraying the release agent in the mold is realized, the problem of drawing the mold of the product is greatly reduced, the rejection rate of the product is reduced, the production efficiency is effectively improved, the labor and time costs can be saved, the production requirement of a factory is met, and the economic benefit is high.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an in-mold spraying apparatus for a die casting mold according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a rear die holder according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a spray assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a spray coating assembly according to an embodiment of the utility model.

Icon:

100-back die assembly, 101-forming cavity, 102-material conveying channel, 103-threaded hole, 110-back die holder, 120-back die core, 200-telescopic assembly, 210-telescopic device, 220-first sliding block, 230-second sliding block, 231-T-shaped groove, 240-pull rod, 300-inlaid needle, 400-spraying assembly, 410-spherical nozzle, 411-material spraying opening, 420-one-way valve, 421-fixing sleeve, 4211-clamping groove, 422-supporting sleeve, 4221-limit step, 423-spherical valve core and 424-elastic piece.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the prior art, the release agent is generally sprayed outside the die, namely, the release agent is sprayed on the front die and the rear die from the outside when the die is opened, and because some dies have complex structures, such as dies with core pulling mechanisms, some parts leave the die when the die is opened, the sprayed release agent is not effectively sprayed on the core pulling mechanisms, so that the condition of pulling the die easily occurs at the core pulling mechanisms, and the rejection rate of products is improved.

In view of the above, the designer provides an in-mold spraying device for a die casting mold, and through in-mold spraying, the components in the mold can be ensured to be sprayed to a release agent, and defects such as drawing mold and the like are not easy to generate during demolding, so that the molding quality of a product is high, the rejection rate is low, and the production cost is low.

Referring to fig. 1-4, in the present embodiment, the in-mold spraying device for a die casting mold includes a rear mold assembly 100, a telescopic assembly 200, an insert 300 and a spraying assembly 400, wherein the rear mold assembly 100 has a molding cavity 101 for molding a product and a material conveying channel 102 for conveying a release agent, the telescopic assembly 200 is connected with the rear mold assembly 100, the insert 300 is connected with the telescopic assembly 200, the telescopic assembly 200 is used for driving the insert 300 to extend into or leave the molding cavity 101, the spraying assembly 400 is installed in the material conveying channel 102, and the material conveying channel 102 is connected with a press conveyor and can spray the release agent onto the insert 300 in an open mold position through the spraying assembly 400.

Based on the above-mentioned scheme, the working mode of the spraying device in the die casting die provided by the embodiment includes, for example:

The spraying device is matched with a press feeder, and the press feeder is communicated with the material conveying channel 102. When the die opening action is completed, the die opening operation of the mold release agent of the components such as the insert 300 can be completed in the die through the spraying assembly 400, namely, a position switch can be arranged, when the product manufacturing is completed and the die is opened to the set position, the position switch is triggered, a signal is sent to the press feeder, the press feeder is started to convey the mold release agent to the material conveying channel 102, and then the mold release agent is sprayed onto the components such as the insert 300 from the spraying assembly 400, so that the operation of spraying the mold release agent in the die is realized, the mold release agent can be fully sprayed at all positions in the die, the problem of die drawing of the product is greatly reduced, the rejection rate of the product is reduced, the production efficiency is effectively improved, in addition, the labor and time cost can be saved, the production requirement of a factory is met, and the economic benefit is high.

The following examples are presented to illustrate details of the in-mold spray apparatus for a die casting mold provided by the present application.

Referring to fig. 1, in this embodiment, optionally, the rear mold assembly 100 includes a rear mold base 110 and a rear mold core 120, the rear mold base 110 is provided with a positioning groove, the rear mold core 120 is installed in the positioning groove, and the molding cavity 101 is disposed on the rear mold core 120. The rear mold base 110 and the rear mold core 120 are independently processed and assembled together, and can be processed by different materials respectively, thereby reducing the processing and manufacturing costs. The cost for processing the rear mold core 120 is high, the rear mold base 110 plays a role of supporting and positioning the rear mold core 120, and the processing material budget can be relatively low, so that the cost is saved.

Further, the rear mold base 110 and the rear mold core 120 are both provided with a material conveying channel 102. The material conveying channels 102 are formed on the rear die holder 110 and the rear die core 120, and can convey the release agent from different material conveying channels 102 according to requirements, so that the release agent is sprayed from different positions, and therefore the release agent is sprayed to corresponding positions of the die, and can be sprayed to a plurality of positions, thereby facilitating the release of the die.

It should be understood that the number of the material conveying channels 102 on the rear mold base 110 and the rear mold core 120 may be set as required, which is not specifically limited in this embodiment, and a spraying assembly 400 is installed in each material conveying channel 102, and the spraying assembly 400 has the same combination structure with the material conveying channel 102, and in this embodiment, only a combination of a pair of material conveying channels 102 and spraying assemblies 400 is used as an example for illustration in order to avoid redundancy of description.

Referring to fig. 2, optionally, an end of the material conveying channel 102 located inside the mold is provided with an internal thread, that is, a partial threaded hole 103 is formed, so as to facilitate the cooperation with the spraying assembly 400.

In addition, the serpentine shape of the material conveying channel 102 may be set as required, and may be a straight channel, a curved channel, or the like, and may be adapted to the mold structure.

Referring to fig. 1, in this embodiment, optionally, the telescopic assembly 200 includes a telescopic device 210, a first slider 220 and a second slider 230, the telescopic device 210 is connected to the rear die holder 110, the first slider 220 is connected to the second slider 230, the insert pin 300 is connected to the first slider 220, the second slider 230 is connected to the telescopic device 210, the material conveying channel 102 on the rear die core 120 is matched with the insert pin 300, and the material conveying channel 102 on the rear die holder 110 is matched with the second slider 230. The first slider 220 and the second slider 230 are independently processed and then matched together, so that the processing is convenient and the cost is low. The expansion piece 210 drives the insert pin 300 to move through the first sliding block 220 and the second sliding block 230, the movement of the insert pin 300 is more stable, and the position of the insert pin 300 is determined through the first sliding block 220 and the second sliding block 230, so that the insert pin 300 can be precisely matched with the forming cavity 101, and the forming quality of products is improved.

It should be appreciated that the telescopic device 210 may be an air cylinder or a hydraulic cylinder, etc., and has a simple structure, convenient operation and control, and is beneficial to controlling the position of the insert pin 300.

In addition, the first slider 220 and the second slider 230 are slidably matched with the rear mold assembly 100, when the mold is at the mold opening position, the release agent sprayed by the material conveying channel 102 arranged on the rear mold core 120 can reach the insert pin 300, the release agent sprayed by the material conveying channel 102 arranged on the rear mold base 110 can reach the second slider 230, and the release agent spraying of the insert pin 300 and the second slider 230 is realized.

Further, a T-shaped slot 231 may be disposed on the second slider 230, and a pull rod 240 may be mounted at the telescopic end of the telescopic device 210, where the pull rod 240 is engaged with the T-shaped slot 231, so as to realize power transmission.

Referring to fig. 3 and 4, in this embodiment, optionally, the spraying assembly 400 includes a spherical nozzle 410 and a check valve 420, the spherical nozzle 410 is provided with a material spraying opening 411, the spherical nozzle 410 and the check valve 420 are both located in the material conveying channel 102, and the spherical nozzle 410 is movably matched with the material conveying channel 102 to adjust the discharging direction of the material spraying opening 411. The check valve 420 is positioned behind the spherical spray head 410, and the check valve 420 allows release agent to be sprayed only from the spherical spray head 410, and release agent sprayed from the spherical spray head 410 is blocked by the check valve 420 and does not enter the material conveying passage 102 through the check valve 420. The structural design of the spherical spray head 410 can adjust the angle of the spherical spray head 410 relative to the material conveying channel 102 after the spherical spray head 410 is installed in the material conveying channel 102, namely, the angle of the spray opening 411 is adjusted, so that the spray opening 411 can better correspond to the part of the mold, on which the release agent is to be sprayed, and the release agent can accurately reach the mold, the spraying effect is good, the release agent can be saved, and the waste of materials is reduced. Meanwhile, by arranging the check valve 420, when the release agent is pumped into the material conveying channel 102 by the press conveyor, the release agent passes through the check valve 420 and then enters the spherical nozzle 410, and is sprayed onto the die from the spherical nozzle 410. After being sprayed out, the release agent cannot flow back into the material conveying channel 102 from the check valve 420, so that the material conveying channel 102 is not easy to be polluted.

Optionally, the check valve 420 includes a fixed sleeve 421, a supporting sleeve 422, a ball valve element 423, and an elastic member 424. Both sides of the fixed sleeve 421 are open, wherein one side of the fixed sleeve is open and communicated with the material conveying channel 102, and the other side of the fixed sleeve is open and corresponds to the spherical spray head 410. Both ends of the supporting sleeve 422 are open, the supporting sleeve 422 is installed in the fixed sleeve 421, the spherical spray head 410 is clamped between the supporting sleeve 422 and the fixed sleeve 421, a limiting step 4221 is arranged on the inner wall of the supporting sleeve 422, namely, a first hole section and a second hole section which are communicated are formed in the supporting sleeve 422, the diameter of the first hole section is smaller than that of the second hole section, the first hole section is communicated with the opening of the fixed sleeve 421, which is far away from the spherical spray head 410, a limiting step 4221 is formed at the joint of the second hole section and the first hole section, and the spherical valve core 423 is installed at the limiting step 4221 and can be plugged to the end part of the first hole section, which is communicated with the second hole section. The elastic member 424 is located between the ball valve element 423 and the ball nozzle 410, and is used for enabling the ball valve element 423 to have a movement tendency close to the limiting step 4221, so that the ball valve element 423 can be normally located at a position for closing the first hole section. The outer peripheral surface of the fixed sleeve 421 is provided with external threads, the fixed sleeve 421 is inserted into the material conveying channel 102, and the external threads on the fixed sleeve 421 are in threaded fit with the internal threads on the inner wall of the material conveying channel 102. The spray assembly 400 is simple in structure and convenient to assemble with the rear mold core 120 or the rear mold base 110.

In the operation process, the elastic force of the elastic element 424 needs to be overcome during spraying, the spherical valve core 423 is pushed open, and the hole section at the limiting step 4221 is opened, so that the release agent can be sprayed out from the spraying opening 411 of the spherical spray head 410, that is, the release agent can be ensured to be sprayed out at a certain speed, and the release agent can be ensured to smoothly move to the position to be sprayed. When the pressure-feed force of the release agent is reduced and insufficient to spray on the die, the spherical valve core 423 is pushed to the limiting step 4221 under the action of the elastic piece 424, the limiting step 4221 is blocked, the release agent is not easy to overflow from the spherical nozzle 410, and the waste of materials is reduced.

It should be appreciated that the resilient member 424 may be a spring.

Further, an end of the fixing sleeve 421 is provided with a locking groove 4211 for being matched with a screwdriver. The screwdriver can drive the fixed sleeve 421 to rotate by inserting tools such as the screwdriver into the clamping groove 4211, so that the position of the fixed sleeve 421 is adjusted, and the operation is convenient.

It should be appreciated that the clamping groove 4211 may be a straight groove, a cross groove, or the like.

According to the in-mold spraying device for the press-mounting mold, through the newly-added in-mold spraying system in the mold, the die casting machine can transmit signals to the press-feeding machine through the mold action, so that the time of in-mold spraying is basically consistent with that of out-mold spraying, and on the basis of not changing the original production beat, the fact that all positions in the mold can be fully sprayed with a release agent is guaranteed, so that the problem of drawing a mold of a product is greatly reduced, the rejection rate of the product is reduced, the production efficiency is improved, the cost of manpower and time is saved, and the production requirement of a factory can be met.

The embodiment also provides a die casting die, which comprises the in-die spraying device of the press-fitting die of the embodiment.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An in-mold spraying device for a die casting mold, comprising:

The mold comprises a rear mold assembly (100), a telescopic assembly (200), an insert needle (300) and a spraying assembly (400), wherein the rear mold assembly (100) is provided with a molding cavity (101) for molding products and a material conveying channel (102) for conveying release agents, the telescopic assembly (200) is connected with the rear mold assembly (100), the insert needle (300) is connected with the telescopic assembly (200), the telescopic assembly (200) is used for driving the insert needle (300) to extend into or leave from the molding cavity (101), and the spraying assembly (400) is arranged in the material conveying channel (102);

The material conveying channel (102) is used for being connected with a press feeder, and can spray release agent onto the insert pin (300) at the die opening position through the spraying assembly (400).

2. The in-mold spraying device for a die casting mold according to claim 1, wherein:

the rear die assembly (100) comprises a rear die holder (110) and a rear die core (120), wherein the rear die holder (110) is provided with a positioning groove, the rear die core (120) is installed in the positioning groove, and the forming cavity (101) is formed in the rear die core (120).

3. The in-mold spraying device for a die casting mold according to claim 2, wherein:

and the rear die holder (110) and the rear die core (120) are respectively provided with a material conveying channel (102).

4. The in-mold spraying device for a die casting mold according to claim 3, wherein:

the telescopic assembly (200) comprises a telescopic device (210), a first sliding block (220) and a second sliding block (230), wherein the telescopic device (210) is connected with the rear die holder (110), the first sliding block (220) is connected with the second sliding block (230), the insert needle (300) is connected with the first sliding block (220), the second sliding block (230) is connected with the telescopic device (210), a material conveying channel (102) arranged on the rear die core (120) is matched with the insert needle (300), and a material conveying channel (102) arranged on the rear die holder (110) is matched with the second sliding block (230).

5. The in-mold spraying device for a die casting mold according to claim 1, wherein:

The spraying assembly (400) comprises a spherical spray head (410) with a spray opening (411), the spherical spray head (410) is positioned in the material conveying channel (102), and the spherical spray head (410) is movably matched with the material conveying channel (102) so as to adjust the discharging direction of the spray opening (411).

6. The in-mold spraying device for a die casting mold according to claim 5, wherein:

The spray assembly (400) further comprises a one-way valve (420), the one-way valve (420) is installed in the material conveying channel (102), the one-way valve (420) is located behind the spherical spray head (410), and the one-way valve (420) only allows release agent to be sprayed out of the spherical spray head (410).

7. The in-mold spraying device for a die casting mold according to claim 6, wherein:

The check valve (420) comprises a fixed sleeve (421), a supporting sleeve (422), a spherical valve core (423) and an elastic piece (424), wherein the supporting sleeve (422) is installed in the fixed sleeve (421), the spherical spray head (410) is clamped between the supporting sleeve (422) and the fixed sleeve (421), the supporting sleeve (422) is provided with a limiting step (4221), the spherical valve core (423) is installed at the limiting step (4221), the elastic piece (424) is located between the spherical valve core (423) and the spherical spray head (410) and used for enabling the spherical valve core (423) to have a movement trend close to the limiting step (4221), and the fixed sleeve (421) is installed in the material conveying channel (102).

8. The in-mold spraying device for a die casting mold according to claim 7, wherein:

The fixed sleeve (421) is provided with external threads, the material conveying channel (102) is provided with internal threads, and the external threads are fixedly connected with the internal threads in a threaded manner.

9. The in-mold spraying device for a die casting mold according to claim 8, wherein:

The end part of the fixed sleeve (421) is provided with a clamping groove (4211) matched with a screwdriver.

10. A die casting die, characterized in that the die casting die comprises:

an in-mold spraying device for a die casting mold according to any one of claims 1 to 9.