CN112810113B - Blow molding mold and blow molding process - Google Patents

Abstract

The application relates to the technical field of blow molding, in particular to a blow molding mold and a blow molding process, wherein the blow molding mold comprises a first molding half mold and a second molding half mold which are spliced with each other, the first molding half mold is provided with a groove molding block, the outer wall of one side of the first molding half mold, which is provided with the groove molding block, is provided with a blowing mechanism, and the blowing mechanism comprises a blowing assembly connected to the first molding half mold in a sliding manner and a feed driving assembly used for driving the blowing assembly to move; the sliding direction of the blowing assembly is the direction close to or far away from the center of the inner cavity of the first forming half die. This application can reduce the condition that the shaping back handle spacing groove thickness is too thin and influence bottle finished product installation handle back bearing capacity ability, promotes the bearing capacity behind the bottle finished product installation handle.

Description

Blow molding mold and blow molding process

Technical Field

The application relates to the technical field of blow molding, in particular to a blow molding mold and a blow molding process.

Background

Blow molding, also known as blow molding, is a rapidly developing plastic processing method, mainly used for molding hollow plastic products, and widely used for containing drinks, condiments and living goods. The blow molding process is mainly characterized in that a heated bottle blank is placed in a blow molding mold, and then high-pressure gas is injected into the bottle blank so that the bottle blank is expanded to be attached to the inner wall of a molding cavity of the blow molding mold, and a bottle body finished product is obtained.

Referring to fig. 1, a blow mold for molding an oil bottle comprises two molding half molds 10 which are spliced with each other, a groove molding block 11 for molding a handle accommodating groove on a finished bottle body product is arranged on the inner cavity wall of the molding half mold 10, and two limiting lugs 12 for molding a handle limiting groove are arranged on the groove molding block 11. Through the structure, the formed oil bottle can be provided with the handle accommodating groove, and the handle accommodating groove is internally provided with the handle limiting groove for installing the handle.

With respect to the related art in the above, the inventors consider that: in the forming process of the oil bottle, the limit bump 12 can become one of important force bearing points in the pressure expansion process of the bottle blank 3, and the condition that the bottle wall thickness of the formed wine bottle at the handle limit groove is too thin due to the excessive expansion and stretching of the bottle blank 3 attached to the limit bump 12 exists, so that the force bearing performance of the subsequent bottle body finished product after the handle is installed on the handle is influenced.

Disclosure of Invention

First aspect, in order to promote the bearing performance behind the finished product installation handle of bottle, this application provides a blow mold.

The application provides a blow mold adopts following technical scheme:

a blow molding mold comprises a first molding half mold and a second molding half mold which are spliced with each other, wherein the first molding half mold is provided with a groove molding block, the outer wall of one side of the first molding half mold, which is provided with the groove molding block, is provided with an air blowing mechanism, and the air blowing mechanism comprises an air blowing assembly connected to the first molding half mold in a sliding manner and a feed driving assembly used for driving the air blowing assembly to move; the sliding direction of the blowing assembly is the direction close to or far away from the center of the inner cavity of the first forming half mold.

By adopting the technical scheme, after the bottle blank is heated, the bottle blank is placed in the first forming half die, the feeding driving assembly is used for driving the blowing assembly to be close to the bottle blank, then the blowing assembly is used for blowing air and cooling the surface, which is attached to the groove forming block, of the bottle blank after the bottle blank is expanded, then the first forming half die and the second forming half die are driven to be matched, and then high-pressure gas is injected into the bottle blank; the bottle blank starts to expand and stretch under the action of internal high pressure, and the area with low surface temperature of the bottle blank can expand and stretch more slowly; compared with the blow molding process without using a blowing mechanism, the surface of the bottle blank, which is used for being contacted with the groove molding block and the limiting bump in the blow molding process, can be relatively thicker; correspondingly, the thickness of the bottle blank after being coated with the limiting lug is continuously expanded and stretched is relatively thicker, so that the situation that the thickness of a handle limiting groove formed at the position of the limiting lug is too thin to influence the bearing performance of the finished bottle product after the handle is installed on the finished bottle product is reduced, and the bearing performance of the finished bottle product after the handle is installed on the finished bottle product is improved.

Optionally, the blowing assembly comprises a gas collecting plate, a gas collecting cavity communicated with an external gas supply source is formed in the gas collecting plate, and gas outlet holes communicated with the gas collecting cavity are formed in the surface of the gas collecting plate.

By adopting the technical scheme, the air collecting plate is convenient for collecting air flow, and the surface of the bottle blank is blown through the air outlet holes, so that the condition of overlarge blowing range can be reduced.

Optionally, the blowing assembly further comprises a blowing block, the blowing block is connected to the gas collecting plate in a sliding manner, the sliding direction of the blowing block is parallel to the length direction of the first half-mold internal bottle blank, and the surface of the blowing block close to the gas collecting plate is in a fitting shape; the surface of the air collecting plate close to the air blowing block is provided with an air collecting groove communicated with the air outlet hole, and the length direction of the air collecting groove is the same as the sliding direction of the air blowing block; and the air blowing block is provided with an air blowing hole of which one end is communicated with the air collecting groove.

Through adopting above-mentioned technical scheme, the air current is finally blown out by the hole of blowing in the piece of blowing, adjusts the position of the piece of blowing, can reach the regulation to the position of blowing, is convenient for through progressively debugging and verification, makes the position of blowing that the piece of blowing is actual and bottle embryo be used for the extension laminating corresponding in the position of spacing lug to be convenient for realize the subassembly of blowing and to the point-to-point accurate cooling of blowing in bottle embryo surface.

Optionally, the distance between the blowing hole and the first molding half mold clamping surface is gradually reduced along a direction away from the gas collecting plate.

By adopting the technical scheme, the position of the air blowing hole is not aligned with the bottle blank to be blown and cooled, and the air blowing hole is arranged to be inclined so as to blow air flow along the inclined angle, so that the middle area of the surface of the bottle blank can be blown conveniently.

Optionally, the surface of the air collecting plate close to the air blowing block is provided with a guide groove, and the air blowing block is provided with a guide block connected with the guide block in a sliding manner.

Through adopting above-mentioned technical scheme, the guide way slides with the guide block and is connected, can realize the gas collection board and blow the sliding between the piece and be connected, simple structure is practical.

Optionally, the gas collecting plate is provided with bolt holes, the blowing block is provided with waist-shaped holes communicated with the bolt holes, and the length direction of each waist-shaped hole is parallel to the sliding direction of the blowing block.

Through adopting above-mentioned technical scheme, under the gas collection board with blow the circumstances that the piece slided and is connected, utilize the waist shape hole on the piece of blowing, be convenient for use bolt with the block locking of blowing after position control on the gas collection board.

Optionally, the feeding driving assembly includes an installation frame and a feeding driving cylinder, the installation frame is connected to the first forming half die, the feeding driving cylinder is disposed on the installation frame, and a piston rod of the feeding driving cylinder is connected to the gas collecting plate.

Through adopting above-mentioned technical scheme, use and feed the actuating cylinder and can drive whole subassembly of blowing and move along the direction that is close to or keeps away from first shaping half die cavity center, simple structure is practical.

Optionally, a T-shaped groove is formed in the side wall, close to the mounting frame, of the feeding driving cylinder, and the opening direction of the T-shaped groove is parallel to the telescopic direction of the piston rod of the feeding driving cylinder; the mounting frame is provided with a T-shaped block connected with the T-shaped groove in a sliding manner, a plurality of connecting screw holes are formed in the T-shaped groove, and the mounting frame is provided with a kidney-shaped connecting groove communicated with the connecting screw holes.

Through adopting above-mentioned technical scheme, realize feeding the controllability of driving between cylinder and the mounting bracket, increase the suitability of whole mechanism of blowing.

In order to improve the bearing performance of the finished bottle after the handle is installed, the blow molding process is provided.

The blow molding process provided by the application adopts the following technical scheme:

a blow molding process, which adopts the blow mold, comprises the following steps:

s1, heating the bottle blank to a specified temperature;

s2, placing the heated bottle blank in a first forming half mold;

s3, driving the air blowing component to be close to the bottle blank, and blowing air at a fixed point to the surface of the bottle blank through the air blowing hole of the air blowing component for cooling;

s4, stopping the blowing action of the blowing assembly, driving the blowing assembly to move to the outside of the outer wall of the first forming half die along the direction far away from the bottle blank, and driving the first forming half die and the second forming half die to approach each other to realize die assembly;

s5, extending the injection core into the bottle blank from the bottle opening of the bottle blank, and injecting high-pressure gas into the bottle blank through the injection core so that the bottle blank is pressed and expanded to be attached to the inner wall of the forming cavity after the mold is closed, thereby forming a finished bottle body;

s6, exhausting the high-pressure gas in the finished bottle product, drawing the injection core from the finished bottle product, opening the mold and taking out the finished bottle product.

By adopting the technical scheme, the thickness of the handle limiting groove formed at the position of the limiting lug can be reduced to be too thin, so that the bearing performance of the finished bottle product after the handle is installed is influenced, and the bearing performance of the finished bottle product after the handle is installed is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the situation that the bearing performance of the finished bottle body product after the handle is installed on the handle is influenced due to the fact that the thickness of the formed handle limiting groove is too thin is reduced, namely the bearing performance of the finished bottle body product after the handle is installed on the handle is improved;

2. the feeding driving cylinder and the blowing block of the blowing mechanism can be adjusted, so that the whole blowing mechanism has good adaptability.

Drawings

Fig. 1 is a schematic view of a blow mold as indicated in the background of the application.

Fig. 2 is a schematic view of the installation of the cooling mechanism and the first mold half in the embodiment of the present application.

Fig. 3 is a schematic diagram for showing a mounting bracket and a feeding driving cylinder according to the embodiment of the application.

FIG. 4 is a schematic diagram illustrating the feeding driving cylinder and the air blowing assembly according to the embodiment of the present application.

Fig. 5 is an enlarged schematic view of a portion a of fig. 4.

Fig. 6 is a schematic structural view of a gas collecting plate in the embodiment of the present application.

Fig. 7 is a schematic sectional view of a gas collecting plate in the embodiment of the present application.

Description of reference numerals: 1. a first mold half; 10. a molding half-mold; 11. forming a groove forming block; 12. a limiting bump; 2. a blowing mechanism; 21. a mounting frame; 211. mounting a plate; 2111. a kidney-shaped mounting hole; 2112. a horizontal groove; 212. a connecting arm; 2121. a first connecting rod; 2122. a second connecting rod; 21221. a T-shaped block; 21222. a kidney-shaped connecting groove; 2123. an abdicating L-shaped rod; 22. a feed drive cylinder; 221. a T-shaped slot; 222. connecting screw holes; 23. a blowing assembly; 231. a gas collecting plate; 2311. a guide groove; 2312. a gas collection cavity; 2313. an air inlet; 2314. a gas collection tank; 2315. an air outlet; 2316. bolt holes; 232. a blowing block; 2321. a guide block; 2322. a waist-shaped hole; 2323. an air guide part; 2324. a gas blowing hole; 3. and (5) bottle embryo.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a blow mold. Referring to fig. 1 and 2, a blow mold comprises a first molding half mold 1, a second molding half mold, and a blowing mechanism 2 installed on the first molding half mold 1, wherein the first molding half mold 1 and the second molding half mold are in a structural symmetry, and the first molding half mold 1 and the second molding half mold are spliced to form a molding cavity for molding an oil bottle. Specifically, the inner cavity walls of the first forming half mold 1 and the second forming half mold are both formed with groove forming blocks 11, and when the first forming half mold 1 and the second forming half mold are closed, the two groove forming blocks 11 are spliced together to form a handle accommodating groove in the side wall of the oil bottle in the blow molding process. Meanwhile, the upper side and the lower side of the groove forming block 11 are both provided with a limiting lug 12, and the two limiting lugs 12 extend along the direction away from each other; when the first forming half mold 1 and the second forming half mold are closed, the limiting lugs 12 on the two groove forming blocks 11 are correspondingly spliced to form handle limiting grooves used for limiting two ends of a handle in a forming handle accommodating groove in the blow molding process.

Referring to fig. 2 and 3, the blowing mechanism 2 is mounted on the outer wall of the first forming mold half 1 on the side having the groove forming block 11, and specifically, the blowing mechanism 2 includes a mounting frame 21, a feeding driving cylinder 22 and a blowing assembly 23; the mounting frame 21 includes a mounting plate 211 and a connecting arm 212, the mounting plate 211 is rectangular plate-shaped, and four waist-shaped mounting holes 2111 are formed in the mounting plate 211. The four waist-shaped mounting holes 2111 are arranged in the mounting plate 211 in a rectangular array, and the length direction of the four waist-shaped mounting holes 2111 is the vertical direction; correspondingly, threaded mounting holes corresponding to the positions of the waist-shaped mounting holes 2111 one to one are formed in the outer side wall of the first forming half die 1, so that the mounting plate 211 can be connected with the first forming half die 1 through bolts, and the position of the mounting plate 211 can be properly adjusted in the vertical direction according to actual use conditions.

Referring to fig. 3, the connecting arm 212 includes a first connecting rod 2121, a second connecting rod 2122 and an abdicating L-shaped rod 2123, wherein the first connecting rod 2121 and the second connecting rod 2122 are rectangular rod-shaped, and the length direction of the first connecting rod 2121 and the length direction of the second connecting rod 2122 form an included angle of 90 °; the abdicating L-shaped rod 2123 is L-shaped, one end of the abdicating L-shaped rod 2123 is perpendicular to the first connecting rod 2121 and connected with the first connecting rod 2121, and the other end of the abdicating L-shaped rod 2123 is perpendicular to the second connecting rod 2122 and connected with the second connecting rod 2122.

Referring to fig. 3, a strip-shaped horizontal groove 2112 is formed on a surface of the mounting plate 211 facing away from the first molding half die 1, and accordingly, a first connecting rod 2121 is received in the horizontal groove 2112, and the first connecting rod 2121 is connected to the mounting plate 211 through a bolt. And when the first connecting rod 2121 is connected to the mounting plate 211, the length direction of the second connecting rod 2122 is perpendicular to the plane of the mounting plate 211.

Referring to fig. 3, the feeding driving cylinder 22 is a general linear cylinder, the arrangement direction of the feeding driving cylinder 22 is parallel to the length direction of the second connecting rod 2122, and the piston rod of the feeding driving cylinder 22 faces the first molding half 1. Meanwhile, the side wall of the feed driving cylinder 22 near the second connecting rod 2122 has a T-shaped groove 221, and the length direction of the T-shaped groove 221 is parallel to the length direction of the feed driving cylinder 22; accordingly, the second connecting rod 2122 is formed with a T-block 21221 slidably connected to the T-groove 221 near the side wall of the feed driving cylinder 22. The sliding connection between the feeding driving cylinder 22 and the second connecting rod 2122 is realized through the sliding fit between the T-shaped block 21221 and the T-shaped groove 221.

In addition, a plurality of connecting screw holes 222 are arranged at intervals in the T-shaped groove 221 of the feeding driving cylinder 22, and the arrangement direction of the plurality of connecting screw holes 222 is arranged along the length direction of the T-shaped groove 221; accordingly, the second connecting rod 2122 is provided with a kidney-shaped connecting slot 21222, and a bolt is inserted through the kidney-shaped connecting slot 21222 of the second connecting rod 2122 and then connected to the connecting screw hole 222 of the feeding driving cylinder 22, so that the feeding driving cylinder 22 and the second connecting rod 2122 can be connected.

Referring to fig. 3 and 4, the air-blowing assembly 23 is mounted on the piston rod side of the feeding driving cylinder 22, so that the air-blowing assembly 23 is driven to move in a direction close to or away from the central position of the first molding half 1 by the driving action of the feeding driving cylinder 22. Specifically, the air blowing assembly 23 includes an air collecting plate 231 and two air blowing blocks 232; the gas collecting plate 231 is connected with a piston rod of the feeding driving cylinder 22 through a screw, a vertical guide groove 2311 is formed in the surface, deviating from the feeding driving cylinder 22, of the gas collecting plate 231, the upper end of the guide groove 2311 penetrates through the upper surface of the gas collecting plate 231, and the lower end of the guide groove 2311 penetrates through the lower surface of the gas collecting plate 231.

Referring to fig. 4 and 5, the two blowing blocks 232 are formed with guide blocks 2321 at a side facing the gas collecting plate 231, and the guide blocks 2321 are slidably coupled with the guide grooves 2311, so that the blowing blocks 232 are slidably coupled with the gas collecting plate 231. Meanwhile, the blowing block 232 is provided with a vertically arranged waist-shaped hole 2322, and correspondingly, the gas collecting plate 231 is provided with a bolt hole 2316 corresponding to the waist-shaped hole 2322. Bolts penetrate through the waist-shaped holes 2322 on the air blowing block 232 and are connected with the bolt holes 2316 on the gas collecting plate 231, so that the connection between the air blowing block 232 and the gas collecting plate 231 can be realized; meanwhile, the position of the air blowing block 232 can be adjusted vertically.

Referring to fig. 6 and 7, two gas collecting cavities 2312 are formed in the gas collecting plate 231, and the two gas collecting cavities 2312 are arranged at intervals in the vertical direction; the side wall of the gas collecting plate 231 is provided with a gas inlet 2313 communicated with the gas collecting cavity 2312, and the gas inlet 2313 is used for externally connecting a gas pipe for supplying high-pressure gas. Two air collecting grooves 2314 are formed in the guide grooves 2311 of the air collecting plate 231, the two air collecting grooves 2314 are arranged in the vertical direction, and the length direction of the two air collecting grooves 2314 is the vertical direction; air outlet holes 2315 are formed in the two air collecting grooves 2314, and the two air outlet holes 2315 are communicated with the two air collecting cavities 2312 of the air collecting plate 231 in a one-to-one correspondence mode.

Referring to fig. 4 and 7, block-shaped air guides 2323 are formed on the two air blowing blocks 232 at the side away from the air collecting plate 231, and air blowing holes 2324 penetrating through the guide 2321 at the side close to the air collecting plate 231 are formed on the surfaces of the air guides 2323 far away from the air blowing blocks 232; meanwhile, when the air blowing block 232 is connected to the air collecting plate 231 by the bolts, one end of the air blowing hole 2324 near the air collecting plate 231 is communicated with the air collecting groove 2314. In addition, the distance between the guiding hole and the mold clamping surface of the first molding half 1 is gradually reduced along the direction away from the air collecting plate 231, so that the air flow can be blown out from the air blowing hole 2324 along the inclined angle, and the air blowing assembly 23 can blow air to the middle area of one side of the bottle blank 3 facing the groove molding block 11 conveniently. In this embodiment, in order to facilitate the processing of the blowing hole 2324, the surface of the air guide 2323 away from the blowing block 232 may be set to be perpendicular to the length direction of the blowing hole 2324.

The blow mold of the embodiment of the application has the implementation principle that: after the bottle blank 3 is heated to the designated temperature, the bottle blank 3 is placed in the first forming half-mold 1, and the feeding driving cylinder 22 is used for driving the blowing assembly 23 to be close to the bottle blank 3. Blowing air to the air collecting plate 231 in the air blowing assembly 23 through an air pipe, and finally blowing air through the air blowing holes 2324 obliquely arranged in the air blowing block 232, so that the air blowing assembly 23 is used for performing air blowing and cooling on the surface, which is attached to the limiting bump 12, of the bottle blank 3 after being expanded; after the air blowing lasts for a period of time, the air blowing is stopped, and the air blowing assembly 23 is driven by the feeding driving cylinder 22 to move to the outside of the outer wall of the first forming half die 1 along the direction far away from the bottle blank 3.

Then, driving the first molding half die 1 and the second molding half die to be closed, and injecting high-pressure gas into the bottle blank 3; the bottle blank 3 starts to expand and stretch under the action of internal high pressure, and the area with low surface temperature of the bottle blank 3 can expand and stretch more slowly; compared with the blow molding process without using the blowing mechanism 2, the surface of the bottle blank 3 which is used for being contacted with the limiting lug 12 in the blow molding process can be relatively thicker; correspondingly, the thickness of the bottle blank 3 after being extended and stretched to coat the limiting lug 12 is relatively thicker, so that the situation that the thickness of a handle limiting groove formed at the position of the limiting lug 12 is too thin to influence the bearing performance of a finished bottle product after the handle is installed is reduced, and the bearing performance of the finished bottle product after the handle is installed is improved.

The embodiment of the application also discloses a blow molding process.

A blow molding process adopts one of the blow molds, and comprises the following steps:

s1, heating the bottle blank 3 to a specified temperature.

And S2, placing the heated bottle blank 3 in the first forming half die 1.

And S3, driving the air blowing component 23 to be close to the bottle blank 3, and performing air blowing and temperature reduction on the surface, which is attached to the limiting bump 12, of the bottle blank 3 after the bottle blank 3 is expanded through the air blowing hole 2324 of the air blowing component 23.

And S4, stopping the air blowing action of the air blowing assembly 23, driving the air blowing assembly 23 to move to the outside of the outer wall of the first forming half mold 1 along the direction far away from the bottle blank 3, and driving the first forming half mold 1 and the second forming half mold to approach each other to realize mold closing.

And S5, extending the injection core into the bottle blank 3 from the bottle opening of the bottle blank 3, and injecting high-pressure gas into the bottle blank 3 through the injection core so that the bottle blank 3 is expanded under pressure to be attached to the inner wall of the forming cavity after the mold is closed, thereby forming a finished bottle product.

S6, exhausting the high-pressure gas in the finished bottle product, drawing the injection core from the finished bottle product, opening the mold and taking out the finished bottle product.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (5)

1. A blow mould, includes first shaping half mould (1) and the second shaping half mould of mutual amalgamation, first shaping half mould (1) is equipped with recess shaping piece (11), its characterized in that: the outer wall of one side, provided with the groove forming block (11), of the first forming half mold (1) is provided with an air blowing mechanism (2), and the air blowing mechanism (2) comprises an air blowing assembly (23) connected to the first forming half mold (1) in a sliding mode and a feeding driving assembly used for driving the air blowing assembly (23) to move; the sliding direction of the blowing assembly (23) is a direction close to or far away from the center of the inner cavity of the first forming half mold (1);

the blowing assembly (23) comprises a gas collecting plate (231), a gas collecting cavity (2312) communicated with an external gas supply source is formed in the gas collecting plate (231), and gas outlet holes (2315) communicated with the gas collecting cavity (2312) are formed in the surface of the gas collecting plate (231);

the blowing assembly (23) further comprises a blowing block (232), the blowing block (232) is connected to the gas collecting plate (231) in a sliding mode, the sliding direction of the blowing block (232) is parallel to the length direction of the bottle blanks (3) in the first forming half die (1), and the surfaces, close to the gas collecting plate (231), of the blowing block (232) are attached; the surface of the air collecting plate (231) close to the air blowing block (232) is provided with an air collecting groove (2314) communicated with the air outlet hole (2315), and the length direction of the air collecting groove (2314) is the same as the sliding direction of the air blowing block (232); a blowing hole (2324) with one end communicated with the gas collecting groove (2314) is formed in the blowing block (232);

the surface of the air collecting plate (231) close to the air blowing block (232) is provided with a guide groove (2311), and the air blowing block (232) is provided with a guide block (2321) connected with the guide groove (2311) in a sliding manner;

a block-shaped air guide part (2323) is formed on one side, away from the air collecting plate (231), of the air blowing block (232), and the air blowing hole (2324) penetrates from the surface, away from the air blowing block (232), of the air guide part (2323) to one side, close to the air collecting plate (231), of the guide block (2321);

the distance between the air blowing hole (2324) and the die joint surface of the first forming half die (1) is gradually reduced along the direction far away from the air collecting plate (231), so that the air blowing hole (2324) blows air flow along the inclined angle to blow air to the middle area of one side, facing the groove forming block (11), of the bottle blank (3); and the surface of the air guide part (2323) far away from the air blowing block (232) is arranged to be vertical to the length direction of the air blowing hole (2324).

2. A blow mold as in claim 1, wherein: the air collecting plate (231) is provided with a bolt hole (2316), the air blowing block (232) is provided with a waist-shaped hole (2322) communicated with the bolt hole (2316), and the length direction of the waist-shaped hole (2322) is parallel to the sliding direction of the air blowing block (232).

3. A blow mold as in claim 1, wherein: the feeding driving assembly comprises a mounting frame (21) and a feeding driving cylinder (22), the mounting frame (21) is connected to the first forming half die (1), the feeding driving cylinder (22) is arranged on the mounting frame (21), and a piston rod of the feeding driving cylinder (22) is connected with the gas collecting plate (231).

4. A blow mold according to claim 3, wherein: a T-shaped groove (221) is formed in the side wall, close to the mounting frame (21), of the feeding driving cylinder (22), and the opening direction of the T-shaped groove (221) is parallel to the telescopic direction of a piston rod of the feeding driving cylinder (22); the mounting frame (21) is provided with a T-shaped block (21221) connected with the T-shaped groove (221) in a sliding manner, the T-shaped groove (221) is internally provided with a plurality of connecting screw holes (222), and the mounting frame (21) is provided with a kidney-shaped connecting groove (21222) communicated with the connecting screw holes (222).

5. A blow molding process, characterized in that the blow mold according to any one of claims 1 to 4 is used, comprising the following steps:

s1, heating the bottle blank (3) to a specified temperature;

s2, placing the heated bottle blank (3) in a first forming half die (1);

s3, driving the air blowing component (23) to be close to the bottle blank (3), and performing fixed-point air blowing and cooling on the surface of the bottle blank (3) through an air blowing hole (2324) of the air blowing component (23);

s4, stopping the air blowing action of the air blowing assembly (23), driving the air blowing assembly (23) to move to the outside of the outer wall of the first forming half die (1) along the direction far away from the bottle blank (3), and driving the first forming half die (1) and the second forming half die to approach each other to realize die assembly;

s5, extending the injection core into the bottle blank (3) from the bottle opening of the bottle blank (3), and injecting high-pressure gas into the bottle blank (3) through the injection core so that the bottle blank (3) is pressed and expanded to be attached to the inner wall of the forming cavity after being assembled to form a finished bottle body;

s6, exhausting the high-pressure gas in the finished bottle product, drawing the injection core from the finished bottle product, opening the mold and taking out the finished bottle product.

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