CN214982897U - Mould exhaust structure and injection mould - Google Patents

Abstract

The utility model discloses a mould exhaust structure and injection mold. The mold exhaust structure is used for exhausting gas in the production process of an injection molding piece and comprises an upper mold core, a lower mold core and an exhaust insert, wherein a cavity is defined between the upper mold core and the lower mold core and is used for injecting materials to form the injection molding piece; the exhaust insert comprises a connecting portion and an exhaust portion, an exhaust passage and an air guide passage are formed between the exhaust portion and the inner wall of the mounting hole, the width of the air guide passage is larger than that of the exhaust passage, the exhaust passage is located on the side portion of the cavity, the cavity is communicated with the exhaust passage, the exhaust passage is communicated with the air guide passage, and the air guide passage is communicated with the outside. The cavity, the exhaust passage and the air guide passage are communicated in sequence, the width of the air guide passage is larger than that of the exhaust passage, air in the cavity is discharged into the air guide passage through the exhaust passage, and the speed of air flow can be reduced in the air guide passage, so that the impact of the air flow on the upper mold core and the exhaust insert is reduced, and the service life of the injection mold is prolonged.

Description

Mould exhaust structure and injection mould

Technical Field

The utility model belongs to the technical field of the injection moulding technique and specifically relates to a mould exhaust structure and injection mold are related to.

Background

In the production of injection molding, for the shaping cycle who shortens the product, can set up a plurality of runners on the mould, pour simultaneously from the runner of difference and fill the die cavity, but when many runners were moulded plastics, the intersection of the material stream that gets into by different runners easily produced the stagnant gas, leads to the product bad. Therefore, it is desirable to place the vented inserts at the intersection of the streams, but the vented inserts may leave insert lines on the product appearance surface, affecting the product appearance. In the related art, the exhaust insert is disposed at a position avoiding the appearance surface of the product, but in order to avoid the appearance surface of the product, the exhaust passage usually has a turning part and cannot be directly communicated to the outside, and the exhaust passage is not reasonable enough in structure, so that the exhausted gas may impact the mold core or the insert to cause cracks on the mold core or the insert, thereby affecting the service life of the mold.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a mould exhaust structure can cushion the combustion gas, improves the life of mould.

The utility model also provides an injection mold of including above-mentioned mould exhaust structure.

The mold exhaust structure provided by the embodiment of the first aspect of the utility model is used for exhaust of injection molding pieces in the production process, and comprises an upper mold core, a lower mold core and an exhaust insert, wherein the upper mold core is provided with a mounting hole; a cavity is defined between the lower mold core and the upper mold core and is used for injecting materials to form the injection molding piece; the exhaust insert comprises a connecting portion and an exhaust portion, the connecting portion penetrates through the mounting hole, the exhaust portion is connected to the connecting portion, an exhaust passage and an air guide passage are formed between the exhaust portion and the inner wall of the mounting hole, the airflow cross-sectional area of the air guide passage is larger than that of the exhaust passage, the cavity is communicated with the exhaust passage, the exhaust passage is communicated with the air guide passage, and the air guide passage is communicated with the outside.

The utility model discloses the mould exhaust structure that the embodiment of the first aspect provided has following beneficial effect at least: the cavity, the exhaust passage and the air guide passage are communicated in sequence, the width of the air guide passage is larger than that of the exhaust passage, air in the cavity is discharged into the air guide passage through the exhaust passage, and the speed of air flow can be reduced in the air guide passage, so that the impact of the air flow on the upper mold core and the exhaust insert is reduced, and the service life of the injection mold is prolonged.

The utility model discloses an in some embodiments, the junction of the adjacent surface of exhaust mold insert is provided with mold insert chamfer or mold insert fillet, the mold insert chamfer or the mold insert fillet with inject the air vent between the lateral wall of mounting hole, and/or, the junction of the adjacent surface of the inner wall of mounting hole is provided with mould chamfer or last mold fillet, go up the mould chamfer or go up the mold fillet with inject the air vent between the exhaust mold insert, the air vent is used for the intercommunication air guide way and external world.

In some embodiments of the present invention, the exhaust portion includes a first step, and a step surface of the first step defines the exhaust passage with an inner wall of the mounting hole.

In some embodiments of the present invention, the exhaust portion includes a first step and a second step arranged in sequence along an exhaust airflow leading-out direction, the first step is connected to the second step, a step surface of the first step and an inner wall of the mounting hole define the exhaust passage, the step surface of the first step and a connection surface of the first step and a step surface of the second step and an inner wall of the mounting hole define the air leading passage therebetween.

In some embodiments of the present invention, an air guiding groove is disposed on an inner wall of the mounting hole, and a side wall of the air guiding groove and the exhaust portion define the air guiding passage.

In some embodiments of the present invention, an exhaust groove is disposed on an inner wall of the mounting hole, and the side wall of the exhaust groove and the exhaust portion define the exhaust passage.

In some embodiments of the present invention, the cross-sectional area of the exhaust portion gradually increases from the end away from the connecting portion to the end close to the connecting portion.

In some embodiments of the present invention, the exhaust portion has an inclined surface inclined by an end of the exhaust portion away from the connecting portion toward a direction approaching the connecting portion and away from the cavity.

In some embodiments of the present invention, the exhaust passage is located at a side portion of the cavity.

The utility model discloses the embodiment of the second aspect provides an injection mold, including the mould exhaust structure that any above-mentioned embodiment provided.

The utility model discloses the embodiment of the second aspect provides an injection mold has following beneficial effect at least: injection mold adopts the mould exhaust structure that can cushion the die cavity combustion gas, can prevent that the air current from influencing the intensity of mould to guarantee the life of mould.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is an exploded schematic view of a mold venting structure according to some embodiments provided by the first aspect of the present invention;

FIG. 2 is a schematic view of a venting insert and an injection molded part of the venting structure of the mold shown in FIG. 1;

FIG. 3 is a cross-sectional view at the venting insert of the mold venting structure shown in FIG. 1;

FIG. 4 is an enlarged view of portion A circled in FIG. 3;

FIG. 5 is a perspective view of a venting insert of the mold venting structure shown in FIG. 1;

FIG. 6 is a side view of the venting insert shown in FIG. 5;

fig. 7 is a bottom perspective view of the mounting holes of the upper core of the venting structure of the mold shown in fig. 1.

Reference numerals:

the injection molding die comprises an upper die core 100, a mounting hole 110, an exhaust groove 111, an air guide groove 112, a first air guide groove 1121, a second air guide groove 1122, a third air guide groove 1123, an upper die chamfer 113, a lower die core 200, an exhaust insert 300, a connecting portion 310, a connecting hole 311, a bolt 312, an exhaust portion 320, a first step 321, a second step 322, an inclined surface 323, an insert chamfer 330, an exhaust passage 400, an air guide passage 500, a first air guide passage 510, a second air guide passage 520, a third air guide passage 530, an air passage 600, a first air passage 610, a second air passage 620, a third air guide passage 630 and an injection molding 700.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated, for example, up, down, left, right, etc., referred to the orientation description is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the terms "one embodiment," "some embodiments," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The mold exhaust structure provided by the embodiment of the first aspect of the present invention is used for exhausting the injection molding 700 in the production process, and comprises an upper mold core 100, a lower mold core 200 and an exhaust insert 300, wherein the upper mold core 100 is provided with a mounting hole 110; a cavity is defined between the lower mold core 200 and the upper mold core 100 and is used for injecting materials to form the injection molding piece 700; the exhaust insert 300 comprises a connecting portion 310 and an exhaust portion 320, the connecting portion 310 penetrates through the mounting hole 110, the exhaust portion 320 is connected to the connecting portion 310, an exhaust passage 400 and a bleed air passage 500 are formed between the exhaust portion 320 and the inner wall of the mounting hole 110, the airflow cross-sectional area of the bleed air passage 500 is larger than that of the exhaust passage 400, the cavity is communicated with the exhaust passage 400, the exhaust passage 400 is communicated with the bleed air passage 500, and the bleed air passage 500 is communicated with the outside.

For example, as shown in fig. 1, the mold venting structure includes an upper mold core 100, a lower mold core 200, and a venting insert 300, the upper mold core 100 and the lower mold core 200 defining a cavity therebetween for injecting a material to form an injection molded part 700. The connection portion 310 of the degassing insert 300 is inserted into the mounting hole 110 of the upper mold core 100, and the degassing portion 320 is connected to the connection portion 310. In the exhaust process, airflow quickly impacts the upper mold core 100 and the exhaust insert 300, cracks are prone to occurring on the upper mold core 100 and the exhaust insert 300, and the service life is shortened, therefore, the exhaust passage 400 and the air introducing passage 500 are arranged between the exhaust part 320 and the inner wall of the mounting hole 110, the airflow cross-sectional area of the air introducing passage 500 is larger than that of the exhaust passage 400, the cavity is connected to the exhaust passage 400, the exhaust passage 400 is connected to the air introducing passage 500, the air introducing passage 500 is communicated with the outside, air in the cavity is exhausted into the air introducing passage 500 through the exhaust passage 400, the speed of the airflow can be reduced in the air introducing passage 500, accordingly, impact of the airflow on the upper mold core 100 and the exhaust insert 300 is reduced, and the service life of the injection mold is prolonged.

It is understood that the venting insert 300 should be located at the flow intersection of the mold cavity. The exhaust portion 320 and the connecting portion 310 of the exhaust insert 300 may be integrally formed to improve the overall strength of the exhaust insert 300 and prevent the exhaust portion 320 from being separated from the connecting portion 310 due to the injection pressure during the injection molding process. The exhaust duct 400 and the bleed air duct 500 may be formed by providing grooves on the inner walls of the mounting holes 110 and/or on the exhaust insert 300. The number of the exhaust passages 400 is not limited, and a plurality of exhaust passages 400 can be arranged along the length direction of the contact part of the exhaust insert 300 and the injection molding part 700, so that the exhaust efficiency is improved, and the air trapping is reduced. The exhaust insert 300 and the upper mold 100 may be coupled by bolts 312, and referring to fig. 1, 3 and 5, coupling holes 311 may be provided in the coupling portion 310, and the bolts 312 may be screwed into the coupling holes 311 to couple the exhaust insert 300 and the upper mold core 100.

It should be noted that an insert chamfer 330 or an insert fillet is arranged at a joint of adjacent surfaces of the exhaust insert 300, a vent channel 600 is defined between the insert chamfer 330 or the insert fillet and a side wall of the mounting hole 110, and/or an upper mold chamfer 113 or an upper mold fillet is arranged at a joint of adjacent surfaces of an inner wall of the mounting hole 110, a vent channel 600 is defined between the upper mold chamfer 113 or the upper mold fillet and the exhaust insert 300, and the vent channel 600 is used for communicating the air guide channel 500 with the outside.

For example, as shown in fig. 5, an insert chamfer 330 is provided at a junction of adjacent surfaces of the exhaust insert 300, referring to fig. 4, a vent channel 600 is defined between the insert chamfer 330 and a sidewall of the mounting hole 110, and/or, as shown in fig. 7, an upper mold chamfer 113 is provided at a junction of adjacent surfaces of an inner wall of the mounting hole 110, referring to fig. 4, a vent channel 600 is defined between the upper mold chamfer 113 and the exhaust insert 300, and the vent channel 600 is communicated with the bleed channel 500 and the outside, so that the gas in the bleed channel 500 can be exhausted to the outside.

It can be understood that, referring to fig. 4 to 7, the positions of the protrusion of the sidewall of the mounting hole 110 and the recess of the surface of the exhaust insert 300 need to be provided with an upper mold chamfer 113 at the protrusion of the mounting hole 110, and form a vent channel 600 with a triangular cross section with the recess of the exhaust insert 300; in the positions of the sidewall of the mounting hole 110 being concave and the surface of the exhaust insert 300 being convex, an insert chamfer 330 is required to be arranged at the convex position of the exhaust insert 300, and a vent passage 600 with a triangular cross section is formed at the concave position of the mounting hole 110. The arrangement of the air passage 600 may be determined according to the actual shape of the mounting hole 110 and the exhaust insert 300. Above-mentioned mold insert chamfer 330 also can set up to the mold insert fillet, and above-mentioned last mold chamfer 113 also can set up to going up the mold fillet, and visual actual processing degree of difficulty and user demand set up.

It should be noted that the exhaust portion 320 includes a first step 321, and a step surface of the first step 321 and an inner wall of the mounting hole 110 define the exhaust passage 400.

For example, as shown in fig. 5 and 6, the exhaust part 320 includes a first step 321, referring to fig. 4, a step surface of the first step 321 and an inner wall of the mounting hole 110 define an exhaust passage 400, and during injection, gas in the cavity flows to the first step 321 and is exhausted from the exhaust passage 400. Since the step surface of the first step 321 can receive the vertical pressure and the connection portion 310 can receive the front-rear pressure, it is possible to prevent the product size from being affected by the pressure caused by the misalignment between the exhaust insert 300 and the upper core 100.

It should be noted that the exhaust portion 320 includes a first step 321 and a second step 322 sequentially arranged along the exhaust airflow guiding direction, the first step 321 is connected to the second step 322, a step surface of the first step 321 and an inner wall of the mounting hole 110 define the exhaust passage 400, and the air guide passage 500 is defined between the step surface of the first step 321, an engagement surface of the second step 322 and the first step 321, and a step surface of the second step 322 and the inner wall of the mounting hole 110.

For example, as shown in fig. 5 to 6, the exhaust portion 320 includes a first step 321 and a second step 322, and the first step 321, the second step 322 and the connection portion 310 are connected in sequence and have a stepped shape as a whole. Referring to fig. 4, the exhaust passage 400 is defined by the step surface of the first step 321 and the inner wall of the mounting hole 110, the first air guide passage 510 is defined by the step surface of the first step 321 and the inner wall of the mounting hole 110, the second air guide passage 520 is defined by the joint surface of the second step 322 and the first step 321 and the inner wall of the mounting hole 110, the third air guide passage 530 is defined between the step surface of the second step 322 and the inner wall of the mounting hole 110, and the first air guide passage 510, the second air guide passage 520 and the third air guide passage 530 are sequentially communicated to form the air guide passage 500. A plurality of air passages 600 can be formed between the second step 322 and the inner wall of the mounting hole 110, referring to fig. 4, an upper die chamfer 113 is arranged at a corresponding position of a junction between the top surface of the first step 321 and the side surface of the second step 322 to form a first air passage 610, an insert chamfer 330 is arranged at a junction between the side surface of the second step 322 and the top surface to form a second air passage 620, an upper die chamfer 113 is arranged at a corresponding position of a junction between the top surface of the second step 322 and the side surface of the connecting part 310 to form a third air passage 630, the second step 322 can provide a plurality of paths for gas to be exhausted outside, in the injection molding process, the gas is exhausted from the cavity and sequentially passes through the exhaust passage 400, the first air passage 510, the second air passage 520 and the third air passage 530, the gas can flow into the first air passage 610 after passing through the first air passage 510, and can flow into the second air passage 620 after passing through the second air passage 520, after passing through the third air guide passage 530, the air can flow into the third air guide passage 630, and the air can be discharged to the outside from the first air passage 610, the second air passage 620 and the third air guide passage 630, so that the exhaust efficiency is improved.

It is understood that the exhaust portion 320 may include a plurality of second steps 322, and the plurality of second steps 322 are sequentially connected to form a plurality of air channels 600, thereby further improving the exhaust efficiency.

It should be noted that the air guide groove 112 is formed on the inner wall of the mounting hole 110, and the air guide duct 500 is defined by the side wall of the air guide groove 112 and the air exhaust portion 320.

For example, as shown in fig. 7, the air guiding groove 112 is formed on the inner wall of the mounting hole 110, and includes a first air guiding groove 1121, a second air guiding groove 1122, and a third air guiding groove 1123, referring to fig. 3 and 4, the side wall of the air guiding groove 112 and the air exhaust portion 320 define an air guiding passage 500, the side wall of the first air guiding groove 1121 and the top surface of the first step 321 define a first air guiding passage 510, the side wall of the second air guiding groove 1122 and the side surface of the second step 322 define a second air guiding passage 520, and the side wall of the third air guiding groove 1123 and the top surface of the second step 322 define a third air guiding passage 530. The exhaust part 320 does not need to be grooved, so that the strength of the exhaust part 320 can be improved, and the exhaust part 320 is prevented from being deformed or broken in the injection molding process.

It will be appreciated that the number, shape, size, etc. of the bleed air slots 112 are not limited to the solution shown in fig. 7, and may be set according to actual requirements.

It should be noted that the inner wall of the mounting hole 110 is provided with an exhaust groove 111, and the side wall of the exhaust groove 111 and the exhaust portion 320 define an exhaust passage 400.

For example, as shown in fig. 7, the inner wall of the mounting hole 110 is provided with an exhaust groove 111, and referring to fig. 3 and 4, the side wall of the exhaust groove 111 and the exhaust part 320 define an exhaust channel 400, and no groove needs to be formed on the exhaust part 320, so that the strength of the exhaust part 320 can be improved, and the exhaust part 320 can be prevented from being deformed or broken during the injection molding process.

It is understood that the number of the exhaust grooves 111 is not limited, and a plurality of exhaust grooves 111 may be formed along the length direction of the contact portion of the exhaust insert 300 and the injection molded part 700 to form a plurality of exhaust channels 400, so as to improve the exhaust efficiency and reduce the trapped air.

For example, referring to fig. 7 and 4, three exhaust grooves 111 are formed in the surface of the inner wall of the mounting hole 110 opposite to the top surface of the first step 321 along the length direction of the contact portion between the exhaust insert 300 and the injection molded part 700 to form three exhaust channels 400; three first air guiding grooves 1121 are formed in the corresponding positions of the three exhaust grooves 111 to form three first air guiding channels 510, and the exhaust passages 400 in the corresponding positions are communicated with the first air guiding channels 510; a second air guiding groove 1122 is formed in a corresponding position of the middle first air guiding groove 1121 on a surface corresponding to the side surface of the second step 322 to form a second air guiding channel 520; a third air guide groove 1123 is formed in the corresponding position of the second air guide groove 1122 on the surface corresponding to the top surface of the second step 322 to form a third air guide channel 530; an upper die chamfer 113 is arranged on the inner wall of the mounting hole 110 corresponding to the junction of the top surface of the first step 321 and the side surface of the second step 322 to form a first air duct 610, and the first air ducts 510 at two sides are communicated with the second air duct 520 through the first air duct 610. The second bleed grooves 1122 are arranged in the middle of the mounting hole 110 and the surface corresponding to the side surface of the second step 322, so that a gap between the side surface of the second step 322 and the inner wall of the mounting hole 110 is prevented from being too small due to front and rear pressure applied to the exhaust insert 300 in the injection molding process, and unsmooth exhaust is prevented; the third bleed air groove 1123 is disposed in the middle of the mounting hole 110 and the surface corresponding to the top surface of the second step 322, and can prevent the exhaust insert 300 from being pressed in the vertical direction during the injection molding process to cause an excessively small gap between the top surface of the second step 322 and the inner wall of the mounting hole 110, thereby preventing unsmooth exhaust. The above is merely an example of the arrangement of the exhaust duct 400, the air guiding duct 500 and the air duct 600, and is not a limitation of the present invention.

The cross-sectional area of the exhaust portion 320 gradually increases from the end far from the connection portion 310 to the end near the connection portion 310.

For example, as shown in fig. 5 and 6, the sectional area of the exhaust part 320 gradually increases from the end far from the connection part 310 to the end near the connection part 310, so that the strength of the exhaust part 320 can be improved, and the exhaust part 320 can be prevented from being deformed or broken during the injection molding process.

It is understood that the exhaust part 320 may be provided in a stepped type, a truncated pyramid type, or the like.

The exhaust unit 320 has an inclined surface 323, and the inclined surface 323 is inclined from one end of the exhaust unit 320 away from the connection unit 310 toward the connection unit 310 and away from the cavity.

For example, as shown in fig. 6, the inclined surface 323 is a top surface of the first step 321, and is inclined in a direction from the end of the exhaust part 320 away from the connection part 310 toward the connection part 310 and away from the cavity, so that the cross-sectional area of the first step 321 can be gradually increased from the end away from the connection part 310 to the end close to the connection part 310. Referring to fig. 4, the exhaust duct 400 and the first gas guiding duct 510 are both disposed on the inclined surface 323, the inclined surface 323 is inclined upward, and gas in the cavity is heated during the injection molding process, and can be more easily exhausted along the exhaust duct 400 and the first gas guiding duct 510 that are inclined upward.

It is understood that the inclination angle of the inclined surface 323 is not limited, and may be set according to actual use requirements.

It should be noted that the vent 400 is located at the side of the cavity.

For example, as shown in fig. 2 to 4, the exhaust passage 400 is located at the side of the cavity, after injection molding is completed, the exhaust part 320 is attached to the inner side of the injection molded part 700, and an insert line generated by the exhaust passage 400 is located on the inner side of the injection molded part 700, so that the insert line can be prevented from being left on the appearance surface of the injection molded part 700, and the appearance quality of the injection molded part 700 can be ensured.

The utility model discloses the embodiment of the second aspect provides an injection mold, including the mould exhaust structure that any above-mentioned embodiment provided.

Injection mold adopts the mould exhaust structure that can cushion the die cavity combustion gas, can prevent that the air current from influencing the intensity of mould to guarantee the life of mould.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. Mould exhaust structure for the exhaust of injection molding in process of production, its characterized in that includes:

the upper die core is provided with a mounting hole;

the lower mold core and the upper mold core define a cavity therebetween, and the cavity is used for injecting materials to form the injection molding piece;

the exhaust insert comprises a connecting portion and an exhaust portion, the connecting portion penetrates through the mounting hole, the exhaust portion is connected to the connecting portion, an exhaust passage and an air guide passage are formed between the exhaust portion and the inner wall of the mounting hole, the airflow cross-sectional area of the air guide passage is larger than that of the exhaust passage, the cavity is communicated with the exhaust passage, the exhaust passage is communicated with the air guide passage, and the air guide passage is communicated with the outside.

2. The mold exhaust structure according to claim 1, wherein an insert chamfer or an insert fillet is provided at a junction of adjacent surfaces of the exhaust insert, a vent channel is defined between the insert chamfer or the insert fillet and a side wall of the mounting hole, and/or an upper mold chamfer or an upper mold fillet is provided at a junction of adjacent surfaces of an inner wall of the mounting hole, a vent channel is defined between the upper mold chamfer or the upper mold fillet and the exhaust insert, and the vent channel is used for communicating the gas guide channel with the outside.

3. The mold vent structure of claim 1, wherein the vent portion comprises a first step, a step surface of the first step and an inner wall of the mounting hole defining the vent passage.

4. The mold vent structure according to claim 2, wherein the vent portion includes a first step and a second step arranged in this order along a direction in which the exhaust gas flow is guided, the first step being connected to the second step, a step surface of the first step and an inner wall of the mounting hole defining the vent passage, and the vent passage is defined between the step surface of the first step, an engagement surface of the second step and the first step, and a step surface of the second step and the inner wall of the mounting hole.

5. The mold exhaust structure according to any one of claims 1 to 4, wherein an air guide groove is formed in an inner wall of the mounting hole, and a side wall of the air guide groove and the exhaust portion define the air guide passage.

6. The mold venting structure as claimed in any one of claims 1 to 4, wherein an inner wall of the mounting hole is opened with a vent groove, and a sidewall of the vent groove and the vent portion define the vent passage.

7. The mold vent structure according to any one of claims 1 to 4, wherein a sectional area of the vent portion gradually increases from an end distant from the connecting portion to an end close to the connecting portion.

8. The mold venting structure of claim 7, wherein the vent portion has an inclined surface that is inclined from an end of the vent portion remote from the connecting portion to a direction that is closer to the connecting portion and away from the cavity.

9. The mold venting structure as claimed in any one of claims 1 to 4, wherein the vent passage is located at a side portion of the cavity.

10. An injection mold comprising the mold venting structure of any one of claims 1 to 9.

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