A large-format deep-cavity plastic part injection mold

Abstract

The present application relates to the technical field of ejection molding products, and particularly relates to a large-format deep-cavity plastic part injection mold, which comprises a female mold having a cavity, and a vacuum-breaking channel is arranged at the center of the cavity, at the outer edge of the cavity, and between the center of the cavity and the outer edge of the cavity, and the vacuum-breaking channel has a gas injection channel opening communicated with the cavity, so that the gas is injected into the cavity of the female mold through the vacuum-breaking channel when the large-format deep-cavity plastic part injection mold is opened, the demolding resistance caused by the atmosphere is eliminated, the large-format deep-cavity plastic part is prevented from being left in the female mold after the mold is opened, and the normal ejection operation of the plastic part by the ejection system on the male mold is affected, the normal demolding of the large-format deep-cavity plastic part is facilitated, and the product is prevented from being scrapped due to the non-normal taking out caused by falling into the female mold.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ejection molding products, in particular to a large-format deep-cavity plastic part injection mold. BACKGROUND

[0002] Plastic parts belong to plastic products. At present, large-format deep-cavity plastic parts with relatively large surface area and deep cavity are needed on some large equipment. After the plastic parts are injection molded by an injection mold, the plastic parts need to be first loosened and separated from the mold, and then the plastic parts are ejected from the mold, and then the plastic parts are taken out by a mechanical hand or manually. For such plastic parts with cavities, the corresponding injection mold includes a female die and a male die, and a ejection system is arranged on the male die. In order to facilitate demolding, it is necessary to ensure that the plastic part is tightly wrapped on the male die core after the mold is opened, so that the plastic part is separated from the mold by the ejection system arranged on the male die.

[0003] In order to make the plastic part tightly wrapped on the male die core after the mold is opened, the prior art usually sets different temperatures of the male die and the female die during injection molding, and uses thermal expansion and contraction to make the plastic part shrink and tightly wrap on the male die core after the mold is opened. This method can be applied to conventional small plastic parts. For large-format deep-cavity plastic parts, their normal production process is shown in Figure 1 、 Figure 2 、 Figure 3 As shown in the figure, the large-format deep-cavity plastic part 300 is injection molded by the female die 200 and the male die 100, normally opened (the plastic part remains on the male die), and the ejection system on the male die ejects the plastic part. However, this large-format deep-cavity plastic part often falls into the female die after the mold is opened in actual production, as shown in Figure 4 The plastic part is stuck on the female die 200. After research and analysis, the reason is that a vacuum is easily formed between the large-format deep-cavity plastic part and the female cavity. Affected by the vacuum suction force on the side of the female die, the plastic part does not remain on the male die core after the mold is opened, but falls into the female die, which cannot be normally taken out. If the traditional pulling, copper rod prying and other methods are used to forcibly demold, not only the plastic part will be deformed, but also the mold will be easily damaged. SUMMARY

[0004] The purpose of the present application is to provide a large-format deep-cavity plastic part injection mold to solve the problem that the existing injection mold easily causes the large-format deep-cavity plastic part to remain on the female die after the mold is opened, which leads to difficulty in taking out the plastic part.

[0005] The technical scheme of the large-format deep-cavity plastic part injection mold of the present application is as follows:

[0006] The utility model provides a large -scale deep cavity plastic injection mould, including the female die, the female die has the cavity, is equipped with the vacuum breaking channel on the female die in the cavity center, the cavity periphery and the cavity center and the cavity periphery between, the vacuum breaking channel has the gas injection channel mouth with the cavity, to inject gas to the cavity of female die through the vacuum breaking channel when the large -scale deep cavity plastic injection mould opens, and the width of gas injection channel mouth is 5-7 mu.

[0007] Beneficial effect: by setting the vacuum breaking channel on the female die, and setting the vacuum breaking channel respectively in multiple positions of the cavity, thereby injecting gas into the cavity of the female die through each vacuum breaking channel when the mould opens, eliminating the demoulding resistance caused by the atmosphere, avoiding the large -scale deep cavity plastic parts left in the female die after opening the mould to affect the normal ejection operation of the plastic parts by the ejection system on the male die, beneficial to the normal demoulding of the large -scale deep cavity plastic parts, avoiding the product scrap due to the non - normal taking out caused by falling into the female die, at the same time, injecting gas through multiple vacuum breaking channels can improve the demoulding efficiency while avoiding the larger opening of a single vacuum breaking channel affecting the plastic forming.

[0008] Further, the female die is provided with an air inlet mounting hole, and an insert is arranged in the air inlet mounting hole.

[0009] Beneficial effect: by setting the insert, the vacuum breaking channel is set on the insert, which is convenient for processing the vacuum breaking channel, and the insert can be replaced and installed, which is convenient for maintenance.

[0010] Further, the insert comprises a bushing and an insert block, the bushing is fixed in the air inlet mounting hole, and the insert block is fixed in the center hole of the bushing, and the vacuum breaking channel is arranged on the insert block.

[0011] Beneficial effect: the insert is set as a split bushing and an insert block, and the bushing is beneficial to ensuring the sealing between the insert block and the female die body.

[0012] Further, at least two vacuum breaking channels are arranged on the insert block at intervals.

[0013] Beneficial effect: by using the dispersed vacuum breaking channels, it is beneficial to increase the flow area while avoiding the larger opening of the vacuum breaking channel to reduce the influence of the gas injection channel mouth on the plastic forming.

[0014] Further, the insert block has an outer peripheral surface opposite to the hole wall of the center hole of the bushing, and a first gas groove is arranged on the outer peripheral surface of the insert block, the first gas groove constitutes the vacuum breaking channel, and the opening of the first gas groove communicating with the cavity constitutes the gas injection channel mouth.

[0015] Beneficial effect: by using the larger outer peripheral surface of the insert block, it is convenient to dispersely arrange each first gas groove and convenient for processing.

[0016] Further, the air inlet mounting hole is provided with an inner step facing away from the cavity of the female die, the air inlet mounting hole is provided with an air pipe, the end of the air pipe is provided with a flange, the flange is fixed on the inner step and the flange blocks one side of the female die facing away from the cavity of the female die, the one side of the female die facing away from the cavity of the female die is provided with a second air groove, and the second air groove communicates the air pipe with the first air groove.

[0017] Beneficial effects: the flange of the air pipe can limit the insert, and in order to avoid the flange blocking the first air groove, the second air groove is arranged on the one side of the female die facing away from the cavity of the female die, and the second air groove communicates the air pipe with the first air groove.

[0018] Further, the flange has a ring-shaped boss protruding towards the insert, and the ring-shaped boss extends into the center hole of the bushing and blocks one side of the female die facing away from the cavity of the female die.

[0019] Beneficial effects: after the insert is installed into the air inlet mounting hole of the female die, the ring-shaped boss of the flange extends into the center hole of the bushing, the extension process of the flange is guided, and the installation of the flange is facilitated.

[0020] Further, the air inlet mounting hole has a wedge-shaped hole section, the wedge-shaped hole section gradually narrows in the direction close to the cavity of the female die, and the insert has a wedge-shaped structure and is tightly fixed in the wedge-shaped hole section.

[0021] Beneficial effects: the fixing of the insert and the mold is realized through the cooperation of the wedge-shaped structure, and the use of fasteners is reduced.

[0022] Further, the female die is provided with multiple air vent positions, each air vent position is provided with the vacuum breaking channel, and the air vent positions are distributed in a radial manner.

[0023] Beneficial effects: the air vent positions are distributed in a radial manner at the cavity of the female die, and uniform air inlet is facilitated.

[0024] Further, the vacuum breaking channel is connected with a gas supply device, and the gas supply device includes two or more first air inlet pipes arranged side by side, and each first air inlet pipe is connected with a vacuum breaking channel.

[0025] Beneficial effects: the gas supply pressure is controlled through the gas supply device, different first air inlet pipes are used to supply gas to respective corresponding vacuum breaking channels, pipeline arrangement is facilitated, and the injection efficiency is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the large-format deep-cavity plastic part in the prior art when the part is formed in a mold;

[0027] Figure 2 It is a schematic diagram of the male die and the female die in the prior art when the male die and the female die are normally separated; Figure 1

[0028] ​Figure 3 is a schematic view of the ejection of the large-format deep-cavity plastic part in Figure 2 ;

[0029] Figure 4 is a schematic view of the ejection of the large-format deep-cavity plastic part in Figure 1 ;

[0030] Figure 5 is a schematic view of the structure of the cavity side of the cavity of the injection mold for the large-format deep-cavity plastic part;

[0031] Figure 6 is a schematic view of the cross section of Figure 5 ;

[0032] Figure 7 is a schematic view of the structure of the insert in Figure 6 ;

[0033] Figure 8 is a schematic view of the structure of the first air inlet pipe on the side away from the cavity and the cavity body of Figure 5 ;

[0034] Figure 9 is a schematic view of the structure of the side facing the cavity of the insert in Figure 6 ;

[0035] Figure 10 is a schematic view of the structure of the insert block in Figure 7 ;

[0036] Figure 11 is a top view of Figure 10 ;

[0037] Figure 12 is a side view of Figure 10 .

[0038] In the drawings: 100, male mold; 200, female mold; 300, large-format deep-cavity plastic part; 1, cavity; 2, air inlet mounting hole; 3, first air inlet pipe; 4, second air inlet pipe; 5, flange; 6, bolt; 7, bushing; 8, pin; 9, insert block; 91, first air groove; 92, pin hole. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer and more apparent, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application, i.e., the described examples are only a part of the examples of the present application, but not all the examples. The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations.

[0040] The following detailed description of embodiments of the application in the drawings provided is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. Based upon the embodiments of the application, all other embodiments that would be obvious to those skilled in the art from the present application without doing creative work are within the scope of the application claimed.

[0041] It should be noted that the relationship terms such as "first" and "second" and the like that can appear in the specific embodiments of the application are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms such as "include", "contain" or any other variants that can appear are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the elements defined by the possible appearing statements "include a" and the like do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0042] In the description of the application, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" that can appear should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0043] In the description of the application, unless otherwise explicitly specified and limited, the term "provided with" that can appear should be understood broadly, for example, the object "provided with" can be part of the body, or it can be arranged separately from the body and connected to the body, and the connection can be detachable or non-detachable. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0044] The application will be further described in detail below in combination with the embodiments.

[0045] Embodiment 1 of the large-area deep-cavity plastic part injection mold of the application:

[0046] As Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 ,Figure 11 、 Figure 12 As shown in FIGS. 1-2, the large-format deep-cavity plastic part injection mold comprises a male mold and a female mold 200, the male mold has a core, the male mold is provided with an ejection system, the female mold 200 has a cavity 1, the female mold 200 has a female mold body, the female mold body is provided with gas inlet mounting holes 2 in communication with the cavity 1, inserts are mounted in the gas inlet mounting holes 2, the inserts comprise bushings 7 and inserts 9, the inserts 9 are provided with vacuum breaking channels, the vacuum breaking channels are in communication with the cavity 1 of the female mold 200, the vacuum breaking channels are connected with a gas supply device, the gas supply device comprises a gas inlet pipeline arranged on the side of the female mold 200 away from the cavity 1 and an air compressor connected with the gas inlet pipeline, the gas inlet pipeline comprises a first gas inlet pipeline 3 and a second gas inlet pipeline 4, the second gas inlet pipeline 4 extends into the gas inlet mounting hole 2 and is in communication with the vacuum breaking channel on the insert 9, so as to inject gas into the cavity 1 of the female mold 200 through the vacuum breaking channel when the large-format deep-cavity plastic part injection mold is opened.

[0047] The gas inlet mounting holes 2 are arranged radially around the center line of the female mold 200, that is, the gas inlet mounting holes 2 are arranged at the center of the cavity, the outer edge of the cavity and between the center of the cavity and the outer edge of the cavity, the extension direction of the axis of the gas inlet mounting hole 2 is the same as the extension direction of the center line of the female mold 200, the gas inlet mounting hole 2 is a stepped hole comprising a small hole section close to the cavity 1 and a large hole section away from the cavity 1, an inner step of the female mold 200 away from the cavity 1 is formed at the transition between the small hole section and the large hole section, the large hole section is a constant-diameter hole, and the small hole section is a wedge-shaped hole section that gradually narrows in the direction close to the cavity 1 of the female mold 200, and the insert is fixed in the wedge-shaped hole section.

[0048] The bushing 7 is wedge-shaped and gradually thins in the direction close to the cavity 1, the wedge-shaped bushing 7 is adapted to the wedge-shaped hole section of the gas inlet mounting hole 2 to fix the bushing 7 in the wedge-shaped hole section, the cross section of the bushing 7 perpendicular to the center line of the bushing 7 is square, and the gas inlet mounting hole 2 is a square hole, the surface of the bushing 7 around the outer periphery of the center line of the bushing 7 is the outer peripheral surface of the bushing 7, and the outer peripheral surface of the bushing 7 is in contact with the inner wall surface of the wedge-shaped hole section.

[0049] The insert 9 is a square block, and the center hole of the bushing 7 is a square hole with equal diameter. The insert 9 is installed in the center hole of the wedge-shaped bushing 7 to form a wedge-shaped insert, which is then tightly fixed in the wedge-shaped hole section. The fixing of the insert and the mold is achieved by the wedge-shaped structure, which is beneficial to reduce the use of fasteners. The insert 9 has four side surfaces arranged around the center line of the insert 9. The four side surfaces form the outer peripheral surface of the insert 9 opposite to the hole wall of the center hole of the bushing 7. The first gas grooves 91 are arranged on each of the four side surfaces. Each first gas groove 91 has multiple grooves arranged side by side and spaced apart. The first gas grooves 91 extend linearly along the extension direction of the center line of the insert 9 and penetrate the two end surfaces of the insert 9. Each first gas groove 91 is in communication with the cavity 1 of the die 200. The first gas grooves form the vacuum breaking channels. The vacuum breaking channels on the same insert 9 are at the same venting position. The first gas grooves have openings in communication with the cavity. The openings form the gas injection channel openings of the vacuum breaking channels. The first gas grooves are square grooves with a square cross section. The corresponding gas injection channel openings are square openings. The width of the gas injection channel opening is a, which is 7 μm. In other embodiments, a can also take other values between 5-7 μm. The plastic material of the large-format deep-cavity plastic part is thermoplastic resin. The temperature of the molten plastic during injection molding is 240℃. The size of the gas injection channel opening is designed to ensure that the molten plastic does not enter the first gas grooves, avoiding burrs. The use of dispersed first gas grooves for gas injection is beneficial to increase the flow area of the vacuum breaking channels while avoiding large openings of the vacuum breaking channels, thereby reducing the influence of the gas injection channel openings on the molding of the plastic part. The large area of the outer peripheral surface of the insert 9 facilitates the dispersion of the first gas grooves 91 and facilitates processing. Since the gas inlet installation holes 2 are radially distributed, the insert is also radially distributed. The vacuum breaking channels are provided at the center of the cavity, the outer edge of the cavity, and between the center of the cavity and the outer edge of the cavity on the die. The venting positions are radially distributed on the surface of the cavity 1 of the die 200, which is beneficial to uniform gas injection, ensures the gas flow, and avoids the influence of large openings of the vacuum breaking channels on the molding of the plastic part.

[0050] The insert 9 is provided with a pin hole 92, and the bushing 7 is provided with a through hole corresponding to the pin hole 92. After the insert 9 is installed in the bushing 7, the pin 8 is installed through the pin hole 92 of the insert 9 and the through hole of the bushing 7 to fix the insert 9 in the bushing 7. The size of the insert 9 in the axial direction of the air inlet mounting hole 2 is smaller than the size of the bushing 7 in the axial direction of the air inlet mounting hole 2. The end face of the insert 9 facing the cavity 1 is flush with the end face of the bushing 7 facing the cavity 1, and is designed to be flush with the cavity wall of the cavity 1. The end face of the insert 9 away from the cavity 1 is in the central hole of the bushing 7. The insert is provided as a split bushing 7 and an insert 9. The bushing 7 helps to ensure the sealing between the insert 9 and the body of the die 200. The insert is provided with a vacuum breaking channel. The machining of the vacuum breaking channel is facilitated. The insert can be replaced and installed, and maintenance is facilitated.

[0051] The second air inlet pipe 4 is provided with a flange 5 at one end extending into the air inlet mounting hole 2. The flange 5 is fixed to the inner step of the air inlet mounting hole 2 away from the cavity 1. The inner step is provided with a threaded hole, and the flange 5 is provided with a flange hole. The flange 5 is fixed to the threaded hole of the inner step by the bolt 6. The flange 5 includes a flange body and an annular boss protruding from the side of the flange body facing the insert 9. The central hole of the flange 5 corresponds to the central hole of the air pipe and is in communication. The central hole of the flange 5 is a stepped hole, including an inner hole of the annular boss with a larger diameter and an inner hole of the flange body with a smaller diameter. The size of the inner hole of the annular boss is larger than that of the inner hole of the flange body, and the size of the inner hole of the flange body is equal to that of the inner hole of the second air inlet pipe. The annular boss is matched with the central hole of the bushing 7. After the flange 5 is fixed to the inner step of the air inlet mounting hole 2, the part of the flange 5 outside the annular boss is pressed against the inner step of the air inlet mounting hole 2 and the bushing 7. The annular boss extends into the central hole of the bushing 7 and blocks one side of the insert 9 away from the cavity 1 of the die 200.

[0052] The side end face of the insert 9 away from the cavity 1 is provided with a second air groove. The second air groove includes a horizontal extension groove and a vertical extension groove. A plurality of horizontal extension grooves are provided side by side and spaced apart. A plurality of vertical extension grooves are provided side by side and spaced apart. The horizontal extension grooves and the vertical extension grooves cross each other. The horizontal extension grooves communicate the first air grooves 91 on the two opposite sides of the insert 9 in the horizontal direction. The vertical extension grooves communicate the first air grooves 91 on the two opposite sides of the insert 9 in the vertical direction. After the annular boss of the flange 5 is pressed against the insert 9, the second air groove can keep the second air inlet pipe in communication with the first air grooves 91, avoiding the flange 5 from blocking the first air grooves 91.

[0053] The second air inlet pipe 4 extends out of the air inlet mounting hole 2 and is connected with the first air inlet pipe 3 at one end away from the flange 5, and a plurality of first air inlet pipes are arranged side by side, each of which is connected with a second air inlet pipe, and the first air inlet pipe is connected with the air compressor pipe through a quick connector, and different first air inlet pipes 3 are used to connect corresponding second air inlet pipes respectively to supply air to the corresponding vacuum breaking channels respectively, which facilitates the pipeline arrangement and is beneficial to guarantee the gas injection efficiency.

[0054] In use, after the large-format deep-cavity plastic part is completed by injection molding, the gas injection device is used to inject compressed gas into the vacuum breaking channel when the mold is opened, the gas enters the cavity of the female mold, the demolding resistance caused by the atmosphere is eliminated, the pressure of the compressed gas is used to separate the plastic part from the female mold, and after the mold is opened, the plastic part is left on the male mold, and then the ejection system on the male mold is used to eject the plastic part; the gas blowing structure arranged on the female mold side can avoid that the large-format deep-cavity plastic part is left on the female mold after the mold is opened, which affects normal ejection and part taking, is beneficial to smooth part taking, and meanwhile, a plurality of air supply positions are distributed on the cavity, and each air supply position includes a plurality of vacuum breaking channels, so that the injection efficiency can be improved by using each vacuum breaking channel on each air supply position, meanwhile, the injection channel opening of each vacuum breaking channel can be relatively small, the burr caused by the injection channel opening during plastic part molding is reduced, and the vacuum breaking channel is formed by the first gas groove on the insert, so that the very small vacuum breaking channel can be easily machined.

[0055] Embodiment 2 of the large-format deep-cavity plastic part injection mold of the present application:

[0056] The difference between the present embodiment and embodiment 1 is that in embodiment 1, the female mold is provided with an air inlet mounting hole, the insert is arranged in the air inlet mounting hole, and the vacuum breaking channel is arranged on the insert. In the present embodiment, the insert is not arranged, the air inlet hole is arranged on the female mold body, the air inlet hole constitutes the vacuum breaking channel, and the opening of the air inlet hole away from the cavity is connected with the air pipe of the gas injection device.

[0057] Embodiment 3 of the large-format deep-cavity plastic part injection mold of the present application:

[0058] The difference between the present embodiment and embodiment 1 is that in embodiment 1, the insert includes a bushing and an insert block, the bushing is fixed in the air inlet mounting hole, the insert block is fixed in the center hole of the bushing, and the vacuum breaking channel is arranged on the insert block. In the present embodiment, the insert is of an integrated structure, the air inlet groove is arranged on the outer circumferential surface of the insert, and the air inlet groove constitutes the vacuum breaking channel.

[0059] Embodiment 4 of the large-format deep-cavity plastic part injection mold of the present application:

[0060] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the insert has an outer peripheral surface opposite to the hole wall of the central hole of the bush, the outer peripheral surface of the insert is provided with the first air groove, and the first air groove forms the vacuum breaking channel. In the embodiment, the insert is provided with a plurality of air holes, and the air holes form the vacuum breaking channel.

[0061] The embodiment 5 of the large-format deep-cavity plastic part injection mold of the present application:

[0062] The difference between the embodiment and the embodiment 1 is that, in the embodiment 1, the insert has an outer peripheral surface opposite to the hole wall of the central hole of the bush, the outer peripheral surface of the insert is provided with the first air groove, and the first air groove forms the vacuum breaking channel. In the embodiment, the insert is provided with a plurality of air holes, and the air holes form the vacuum breaking channel.

[0063] Finally, it should be noted that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments without creative labor, or replace some technical features with equivalents. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A large-format deep-cavity plastic injection mold, comprising a cavity (200) having a cavity (1), characterized in that, The cavity mold (200) is provided with vacuum breaking channels at the cavity center, the cavity outer edge, and between the cavity center and the cavity outer edge. The vacuum breaking channels have air injection ports that communicate with the cavity (1) so that air can be injected into the cavity (1) of the cavity mold (200) through the vacuum breaking channels when the large-format deep cavity plastic injection mold is opened. The width of the air injection port is 5-7μm. The cavity mold is provided with an air inlet mounting hole, and an insert is installed in the air inlet mounting hole. The insert includes a bushing and an insert block installed in the center hole of the bushing by a pin. The bushing has a thickness that gradually changes in the direction close to the cavity. The thin wedge-shaped structure has an air inlet mounting hole with a wedge-shaped hole section for the bushing to be fitted and tightened; multiple first air grooves are distributed on the outer circumference of the insert, the first air grooves penetrate the end face of the insert facing the cavity and the end face facing away from the cavity and form a vacuum breaking channel; an air pipe is provided in the air inlet mounting hole, and a flange fixed in the air inlet mounting hole is provided at the end of the air pipe. The flange has an annular boss that extends into the central hole of the bushing. The part of the flange located outside the annular boss presses on the bushing. The annular boss presses on the end face of the insert facing away from the cavity, and the end face of the insert has a second air groove to keep the air pipe connected to the first air groove.

2. The large-format deep-cavity injection mold for plastic parts according to claim 1, characterized in that, The air intake mounting hole (2) has an inner step facing away from the cavity (1), and the flange (5) is fixed on the inner step.

3. The large-format deep-cavity injection mold for plastic parts according to claim 1 or 2, characterized in that, The die (200) has multiple ventilation positions, each of which has a vacuum breaking channel, and the ventilation positions are radially distributed.

4. The large-format deep-cavity injection mold for plastic parts according to claim 3, characterized in that, The vacuum breaking channel is connected to a gas supply device, which includes two or more first air inlets (3) arranged side by side, and each first air inlet (3) is connected to a vacuum breaking channel.

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