Batch injection molding mold for wine bottle packaging caps

Abstract

The present invention relates to the technical field of bottle cap injection molding, and discloses a batch injection molding mold for wine bottle packaging caps, comprising a top mold mechanism, a middle mold mechanism, a tail mold mechanism and an injection molding mechanism, wherein the top mold mechanism, the middle mold mechanism, the tail mold mechanism and the injection molding mechanism are closely stacked together during injection molding, and the injection molding raw materials flow from the inside of the injection molding mechanism into the inside of the combination of the top mold mechanism, the middle mold mechanism and the tail mold mechanism to form the bottle caps. The batch injection molding mold for wine bottle packaging caps is provided with a tail mold body, and a plurality of groups of circular arrays of gas injection needles are provided on the tail mold body to penetrate the needle through holes and enter the inside of the molding cavity. During the injection molding process, gas is injected into the wine bottle caps that have not yet been formed by the gas injection needles to form bubbles, and the gas injection needles are controlled by a second push rod to be slowly withdrawn from the molding cavity. During the withdrawal process, the gas injection needles also uniformly and intermittently inject gas into the unformed wine bottle caps to form continuous bubbles.

Description

Technical Field

[0001] The invention relates to the technical field of bottle cap injection molding, in particular to a batch injection molding mold for wine bottle packaging caps. Background Art

[0002] Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. The principle of injection molding is to use thermoplastics or thermosetting materials to make various shapes using plastic molding molds. This is achieved through injection molding machines and molds.

[0003] When sealing wine bottles, bottle caps are often used, and the production of bottle caps is mostly formed by injection molding. In order to improve the quality of the finished product, the existing injection molding process will use various means to eliminate the bubbles generated during the injection molding process.

[0004] In fact, this is a prejudice. When uniform bubbles can be produced in injection molded products, the weight of the product will be greatly reduced, as well as the consumption of raw materials.

[0005] Compared with general bottle caps, the packaging caps of wine bottles are mostly used for decoration. They are rarely transparent and are mostly colored to match the color of the wine bottle body. Their thickness is greater than other types of bottle caps. Therefore, a large number of bubbles can exist inside the bottle cap, and the bubbles cannot be seen directly because of the opacity of the bottle cap, and will not affect the aesthetics and practicality.

[0006] The applicant retrieved the closest prior art, which is microcellular foaming technology. However, microcellular foaming technology requires greatly improving the solubility and diffusion rate of carbon dioxide or nitrogen under supercritical conditions. The technology is difficult to use, and microcellular foaming injection molding technology may encounter the problem of deterioration of pore morphology during the mold opening process, resulting in a rapid decrease in the mechanical properties of the product, thereby increasing the cost of injection molding;

[0007] Therefore, low-cost bottle caps are not suitable for microcellular foaming technology.

[0008] In view of the characteristics of wine bottle packaging caps, the present application proposes a batch injection molding mold for wine bottle packaging caps, which is used to evenly fill the wine bottle packaging caps with bubbles to reduce the weight of the caps and save material usage. Summary of the invention

[0009] The object of the present invention is to provide a batch injection molding mold for wine bottle packaging caps to solve the problems raised in the above background technology.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a batch injection molding mold for wine bottle packaging caps, comprising a top mold mechanism, a middle mold mechanism, a tail mold mechanism and an injection molding mechanism, wherein the top mold mechanism, the middle mold mechanism, the tail mold mechanism and the injection molding mechanism are tightly stacked together during injection molding, and the injection molding raw materials flow from the inside of the injection molding mechanism into the inside of the assembly of the top mold mechanism, the middle mold mechanism and the tail mold mechanism to form the bottle cap;

[0011] The top mold mechanism comprises a top mold body, and a plurality of regularly distributed forming holes are formed on the top mold body;

[0012] The middle mold mechanism comprises a middle mold body, the surface of which is fixedly connected with a central hole column having the same position and number as the molding cavity, the central hole column being inserted inside the central hole column to form a bottle cap inner cavity during the injection molding process, and all the central hole columns are provided with needle penetration holes distributed in a circular array with the central hole column axis as the center;

[0013] The tail mold mechanism comprises a tail mold body, a gas injection needle is fixedly connected to the surface of the tail mold body, the gas injection needle is inserted from the needle through hole and extends to the inside of the molding cavity, the gas injection needle is hollow, a ventilation cavity is arranged inside the tail mold body, an air inlet pipe is fixedly connected to a side of the tail mold body away from the gas injection needle, the gas injection needle, the ventilation cavity and the air inlet pipe are connected, and the air inlet pipe injects gas into the gas injection needle;

[0014] The four corners of the tail mold body located on one side of the air inlet pipe are fixedly connected with second push rods;

[0015] The injection molding mechanism comprises a sealing plate, wherein a side of the sealing plate facing the top mold body is provided with an injection molding hole, wherein the position and number of the injection molding hole and the molding cavity are equal, and a side of the sealing plate away from the injection molding hole is fixedly connected with a feed pipe, wherein the feed pipe is connected with the injection molding hole, and the injection molding material is injected from the feed pipe toward the injection molding hole;

[0016] The four corners of the sealing plate are fixedly connected with third push rods, and the third push rods and the feed pipe are located on the same plane.

[0017] Preferably, connecting blocks are symmetrically installed on the side surfaces of the top mold body, and a first push rod is installed on the connecting block, and the first push rod pushes the top mold body away from the middle mold body.

[0018] Preferably, a circulation cavity is provided inside the top mold body, and a circulation pipe is provided on the side of the top mold body. The number of the circulation pipes is two, the two circulation pipes are symmetrically distributed, and the circulation pipes are connected with the circulation cavity.

[0019] Preferably, the circulation pipe on one side injects liquid, and the circulation pipe on the other side discharges liquid to form a circulation, and the liquid is close to the forming cavity.

[0020] Preferably, the central hole column is made of heat-conducting metal, and the length of the central hole column does not exceed the length of the gas injection needle.

[0021] Preferably, the diameter of the gas injection needle is equal to the diameter of the needle through hole, and there is a gap between the outer surface of the gas injection needle and the inner wall of the forming cavity and the outer surface of the central hole column.

[0022] Preferably, both ends of the air intake pipe are rigid pipes, and the middle section of the air intake pipe is a corrugated pipe.

[0023] Preferably, the second push rod is staggered with the first push rod, and the second push rod drives the tail mold body away from the middle mold body.

[0024] Preferably, the gas filled into the air inlet pipe is an inert gas, and the inert gas is slowly and intermittently ejected from the opening of the gas injection needle.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0026] First, the present invention arranges a tail mold body, and arranges a plurality of groups of circular array gas injection needles on the tail mold body to penetrate the needle penetration holes and enter the interior of the molding cavity. During the injection molding process, gas is injected into the unformed wine bottle cap through the gas injection needles to form bubbles, and the gas injection needles are controlled by the second push rod to be slowly withdrawn from the molding cavity. During the withdrawal process, the gas injection needles also uniformly and intermittently inject gas into the unformed wine bottle cap to form continuous bubbles, thereby reducing the weight of the bottle cap and saving the amount of material used.

[0027] Second, the present invention sets a circulation cavity inside the top mold body, and sets a circulation pipe from the side of the top mold body to pass through the circulation cavity. During the injection molding of the wine bottle cap, circulating liquid is injected into the circulation cavity through the circulation pipe, so that the outer surface of the bottle cap is cooled faster than the inside of the bottle cap. Therefore, when preparing bubbles, the gas will not damage the outer surface of the bottle cap, thereby achieving the effect of making the outer surface of the bottle cap intact.

[0028] Third, the present invention arranges a first push rod around the top mold body to push the top mold body, and arranges a second push rod on the tail mold body to push the tail mold body. After the injection molding is completed, the middle mold body remains stationary, and the top mold body and the tail mold body are separated by the first push rod and the second push rod. The formed bottle cap falls off from the surface of the center hole column under the push of the top mold body, thereby achieving the effect of automatic demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention;

[0030] Figure 2It is a schematic diagram of the explosion of the structure of the present invention;

[0031] Figure 3 It is a schematic diagram of the top mold mechanism, the middle mold mechanism and the tail mold mechanism after being superimposed;

[0032] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0033] Figure 5 This is a cross-sectional view of the top mold body structure of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the middle mold mechanism of the present invention;

[0035] Figure 7 It is a schematic diagram of the tail mold structure of the present invention;

[0036] Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at B in the middle;

[0037] Fig. 9 It is a cross-sectional view of the tail mold body structure of the present invention;

[0038] Fig.10 It is a schematic diagram of the structure of the injection molding mechanism of the present invention.

[0039] Wherein: 1. top mold mechanism; 101. top mold body; 102. molding cavity; 103. connecting block; 104. first push rod; 105. circulation cavity; 106. circulation pipe; 2. middle mold mechanism; 201. middle mold body; 202. center hole column; 203. needle through hole; 3. tail mold mechanism; 301. tail mold body; 302. air injection needle; 303. ventilation cavity; 304. air inlet pipe; 305. second push rod; 4. injection mechanism; 401. sealing plate; 402. injection hole; 403. feed pipe; 404. third push rod. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-10A batch injection molding mold for wine bottle packaging caps, comprising a top mold mechanism 1, a middle mold mechanism 2, a tail mold mechanism 3 and an injection molding mechanism 4. The top mold mechanism 1, the middle mold mechanism 2, the tail mold mechanism 3 and the injection molding mechanism 4 are closely stacked together during injection molding, and the injection molding raw materials flow from the inside of the injection molding mechanism 4 into the inside of the combination of the top mold mechanism 1, the middle mold mechanism 2 and the tail mold mechanism 3 to form a bottle cap;

[0042] The top mold mechanism 1 includes a top mold body 101, and a plurality of regularly distributed molding cavities 102 are formed on the top mold body 101;

[0043] The middle mold mechanism 2 includes a middle mold body 201, and the surface of the middle mold body 201 is fixedly connected with a central hole column 202, which is equal to the position and number of the molding cavity 102. The central hole column 202 is inserted inside the central hole column 202 to form the inner cavity of the bottle cap during the injection molding process. The periphery of all the central hole columns 202 is provided with needle penetration holes 203 distributed in a circular array with the axis of the central hole column 202;

[0044] The tail mold mechanism 3 includes a tail mold body 301, a gas injection needle 302 is fixedly connected to the surface of the tail mold body 301, the gas injection needle 302 is inserted from the needle through hole 203 and extends to the inside of the molding cavity 102, the gas injection needle 302 is hollow, a ventilation cavity 303 is arranged inside the tail mold body 301, and an air inlet pipe 304 is fixedly connected to the side of the tail mold body 301 away from the gas injection needle 302, the gas injection needle 302, the ventilation cavity 303 and the air inlet pipe 304 are connected, and the air inlet pipe 304 injects gas into the gas injection needle 302;

[0045] The four corners of the tail mold body 301 on one side of the air inlet pipe 304 are fixedly connected with second push rods 305;

[0046] The injection mechanism 4 includes a sealing plate 401, and an injection hole 402 is opened on a side of the sealing plate 401 facing the top mold body 101. The position and number of the injection hole 402 and the molding cavity 102 are equal. A feed pipe 403 is fixedly connected to a side of the sealing plate 401 away from the injection hole 402. The feed pipe 403 is connected to the injection hole 402, and the injection material is injected from the feed pipe 403 to the injection hole 402.

[0047] The four corners of the sealing plate 401 are fixedly connected with third push rods 404, and the third push rods 404 and the feed pipe 403 are located on the same plane;

[0048] Because bubbles are formed by direct gas injection and extrusion, and the bubbles are not tiny, therefore, it is only necessary to prepare bubbles before the injection molding raw materials are solidified. Compared with the microporous foaming technology, there is no need to wait for the supercritical state, and the gas is quantitatively input, so the possibility of deterioration of the pore morphology is small. Even if the problem of deterioration of the pore morphology occurs, the appearance of the bottle cap can be remedied by adding injection molding raw materials.

[0049] Through the above technical scheme, a tail mold body 301 is provided, and a plurality of groups of gas injection needles 302 in a circumferential array are provided on the tail mold body 301 to penetrate the needle penetration holes 203 and enter the interior of the molding cavity 102. During the injection molding process, gas is injected into the unformed wine bottle cap through the gas injection needles 302, so that the gas is squeezed into the molded injection molding material to form a bubble cavity, and the gas injection needles 302 are controlled by the second push rod 305 to be slowly withdrawn from the molding cavity 102. During the withdrawal process, the gas injection needles 302 also uniformly and intermittently inject gas into the unformed wine bottle cap to form coherent bubbles and avoid a single bubble being too large. Under the same volume, the bubbles occupy part of the space, which relatively reduces the amount of material used. In addition, the bubbles are intermittently injected, so that there is solid support between the bubbles, so as to avoid the interior of the bottle cap being too empty and affecting the strength of the bottle cap, thereby reducing the weight of the bottle cap and saving the amount of material used.

[0050] The bottle cap formed by the above technical solution has a circle of pinholes at its mouth. When the bottle cap is connected to the wine bottle, the pinholes will be blocked by the wine bottle, thereby not affecting the aesthetics of the bottle cap.

[0051] In order to ensure the fullness of the bottle cap, during the solidification process of the bubbles, the injection material is fed through the injection hole 402 to completely fill the gap inside the molding cavity 102 .

[0052] Specifically, a connecting block 103 is symmetrically installed on the side of the top mold body 101 , and a first push rod 104 is installed on the connecting block 103 . The first push rod 104 pushes the top mold body 101 away from the middle mold body 201 .

[0053] Through the above technical solution, a first push rod 104 is set on the side of the top mold body 101. After the injection molding is completed, the first push rod 104 can push the top mold body 101 away from the middle mold body 201, so that the bottle cap on the surface of the center hole column 202 is pushed by the top mold body 101 until it is separated from the support of the center hole column 202 and the molding cavity 102, thereby achieving the effect of automatic demolding.

[0054] Specifically, a circulation cavity 105 is disposed inside the top mold body 101 , and a circulation pipe 106 is disposed on the side of the top mold body 101 . There are two circulation pipes 106 , which are symmetrically distributed and communicate with the circulation cavity 105 .

[0055] Through the above technical scheme, the purpose of setting the circulation chamber 105 and the circulation tube 106 is to be able to inject a coolable substance into the interior of the top mold body 101 through the cooperation of the circulation chamber 105 and the circulation tube 106 to reduce the temperature around the molding cavity 102, so that the outer surface of the bottle cap solidifies faster than the inner part. At this time, gas is injected into the unformed bottle cap through the gas injection needle 302 to form bubbles. Because the outer surface of the bottle cap solidifies first, the bubbles formed at this time will not damage the outer surface of the bottle cap, causing damage or pitting to the outer surface of the bottle cap.

[0056] Specifically, liquid is injected into the circulation pipe 106 on one side, and liquid is discharged from the circulation pipe 106 on the other side to form a circulation, and the liquid is close to the forming cavity 102 .

[0057] Through the above technical solution, liquid is injected into the circulation chamber 105 from the circulation tube 106, which can quickly absorb heat through the fluidity of the liquid, so that the outer surface of the bottle cap solidifies before the inside. Compared with gas, liquid has better heat absorption effect and controllability.

[0058] Specifically, the central hole column 202 is made of heat-conducting metal, and the length of the central hole column 202 does not exceed the length of the gas injection needle 302 .

[0059] Through the above technical solution, the central hole column 202 is set to a heat-conducting metal, so that the interior of the bottle cap can absorb heat quickly, and the heat is conducted and dissipated through the middle mold body 201, so that the inner wall of the bottle cap solidifies faster than the interior of the bottle cap, avoiding the inner wall of the bottle cap being damaged when bubbles are generated, resulting in an uneven inner wall of the bottle cap.

[0060] The length of the central hole column 202 is set so that the gas injection needle 302 can produce bubbles inside the bottle cap to the greatest extent.

[0061] Specifically, the diameter of the gas injection needle 302 is equal to the diameter of the needle through hole 203 , and there is a gap between the outer surface of the gas injection needle 302 and the inner wall of the forming cavity 102 and the outer surface of the central hole column 202 .

[0062] Through the above technical solution, the diameters of the gas injection needle 302 and the needle through hole 203 are set to be equal, so that during injection molding, the raw material will not penetrate from the connection seam between the gas injection needle 302 and the needle through hole 203, thereby avoiding the generation of residues and sharp tips at the bottom of the bottle cap.

[0063] Specifically, both ends of the air inlet pipe 304 are rigid pipes, and the middle section of the air inlet pipe 304 is a corrugated pipe.

[0064] Through the above technical solution, the two ends of the air inlet pipe 304 are set to be rigid, so that they can be conveniently connected to the tail mold body 301 and the air supply pipeline, and the middle of the air inlet pipe 304 is set to be a bellows, so that the middle of the air inlet pipe 304 has ductility. When the tail mold body 301 is displaced, it will not cause excessive pulling on the joint of the air inlet pipe 304, thereby avoiding loosening of the joint.

[0065] Specifically, the second push rod 305 is staggered with the first push rod 104 , and the second push rod 305 drives the tail mold body 301 away from the middle mold body 201 .

[0066] Through the above technical solution, the second push rod 305 and the first push rod 104 are staggered and distributed, so that when the second push rod 305 and the first push rod 104 are working, there is no mutual interference between the second push rod 305 and the first push rod 104.

[0067] Specifically, the gas filled into the air inlet pipe 304 is an inert gas, and the inert gas is slowly and intermittently ejected from the mouth of the gas injection needle 302 .

[0068] Through the above technical solution, the inert gas is used as the medium for bubble generation, which can effectively avoid the high temperature causing the gas to react, thereby making the bubble generation stable;

[0069] The first push rod 104, the second push rod 305 and the third push rod 404 mentioned above are hydraulic, pneumatic or electric devices that can generate linear thrust and are configured according to actual needs, not limited to one or more of the above.

[0070] When in use, the tail mold body 301 is provided, and a plurality of groups of gas injection needles 302 in a circumferential array are provided on the tail mold body 301 to penetrate the needle through-holes 203 and enter the interior of the molding cavity 102. During the injection molding process, the gas injection needles 302 are used to inject gas into the unformed wine bottle cap to form bubbles, and the gas injection needles 302 are controlled by the second push rod 305 to be slowly withdrawn from the molding cavity 102. During the withdrawal process, the gas injection needles 302 also uniformly and intermittently inject gas into the unformed wine bottle cap to form continuous bubbles, thereby reducing the weight of the bottle cap and saving the amount of material used.

[0071] By arranging a circulation cavity 105 inside the top mold body 101, and arranging a circulation pipe 106 from the side of the top mold body 101 to pass through the circulation cavity 105, during the injection molding of the wine bottle cap, circulating liquid is injected into the circulation cavity 105 through the circulation pipe 106, so that the outer surface of the bottle cap is cooled faster than the inside of the bottle cap, so that when the bubble is prepared, the gas will not damage the outer surface of the bottle cap, so that the outer surface of the bottle cap is intact;

[0072] By arranging a first push rod 104 around the top mold body 101 to push the top mold body 101, and arranging a second push rod 305 on the tail mold body 301 to push the tail mold body 301, after the injection molding is completed, the middle mold body 201 remains stationary, and the top mold body 101 and the tail mold body 301 are separated from each other by the first push rod 104 and the second push rod 305. The molded bottle cap falls off from the surface of the center hole column 202 under the push of the top mold body 101, thereby achieving the effect of automatic demoulding.

[0073] The specific steps are:

[0074] S1, superimpose and fit the top mold body 101, the middle mold body 201, the tail mold body 301 and the sealing plate 401, and then evenly inject the injection raw material into the injection hole 402 through the feed pipe 403;

[0075] S2, when the injection molding material enters the molding cavity 102, the liquid is injected into the circulation cavity 105 through the circulation pipe 106 for circulation, thereby cooling and solidifying the outer surface of the bottle cap;

[0076] S3, slowly injecting gas into the gas injection needle 302 through the gas inlet pipe 304, and slowly driving the tail mold body 301 to move through the second push rod 305, so that the gas injection needle 302 is gradually withdrawn from the inside of the bottle cap, and relatively uniform bubbles are formed inside the bottle cap;

[0077] S4, when the gas injection needle 302 is completely pulled out of the bottle cap, wait for the bottle cap to completely solidify and form, and then add a small amount of injection material through the forming cavity 102 to fill the gap in the forming cavity 102;

[0078] S5, the sealing plate 401 is driven backward by the third push rod 404 to leave the closed state, and at the same time, the first push rod 104 drives the top mold body 101 to push in the direction of the sealing plate 401, so that the solidified bottle cap is pushed out from the surface of the central hole column 202, and the bottle cap after being pushed out falls out of the molding cavity 102 to be demoulded because of the reduced contact area;

[0079] S6, repeat the above steps to realize the cyclic injection molding of wine bottle caps.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A batch injection molding mold for wine bottle packaging caps, comprising a top mold mechanism (1), a middle mold mechanism (2), a tail mold mechanism (3) and an injection molding mechanism (4), wherein the top mold mechanism (1), the middle mold mechanism (2), the tail mold mechanism (3) and the injection molding mechanism (4) are tightly stacked together during injection molding, and injection molding raw materials flow from the inside of the injection molding mechanism (4) into the inside of the assembly of the top mold mechanism (1), the middle mold mechanism (2) and the tail mold mechanism (3) to form a bottle cap; Features: The top mold mechanism (1) comprises a top mold body (101), and a plurality of regularly distributed molding holes (102) are formed on the top mold body (101); The middle mold mechanism (2) comprises a middle mold body (201), the surface of the middle mold body (201) being fixedly connected with central hole columns (202) having the same position and number as the molding cavities (102), the central hole columns (202) being inserted into the interior of the central hole columns (202) to form a bottle cap inner cavity during the injection molding process, and all the central hole columns (202) are provided with needle penetration holes (203) distributed in a circular array with the axis of the central hole column (202); The tail mold mechanism (3) comprises a tail mold body (301), a gas injection needle (302) is fixedly connected to the surface of the tail mold body (301), the gas injection needle (302) is inserted from the needle through hole (203) and extends to the inside of the molding cavity (102), the gas injection needle (302) is hollow, a ventilation cavity (303) is provided inside the tail mold body (301), an air inlet pipe (304) is fixedly connected to a side of the tail mold body (301) away from the gas injection needle (302), the gas injection needle (302), the ventilation cavity (303) and the air inlet pipe (304) are connected, and the air inlet pipe (304) injects gas into the gas injection needle (302); The four corners of the tail mold body (301) located on one side of the air inlet pipe (304) are fixedly connected to second push rods (305); The injection molding mechanism (4) comprises a sealing plate (401), wherein a side of the sealing plate (401) facing the top mold body (101) is provided with injection holes (402), the positions and numbers of the injection holes (402) and the molding cavities (102) are equal, and a side of the sealing plate (401) away from the injection holes (402) is fixedly connected with a feed pipe (403), the feed pipe (403) is connected with the injection holes (402), and the injection material is injected from the feed pipe (403) in the direction of the injection holes (402); The four corners of the sealing plate (401) are fixedly connected to third push rods (404), and the third push rods (404) are located on the same plane as the feed pipe (403); A connecting block (103) is symmetrically mounted on the side surface of the top mold body (101), and a first push rod (104) is mounted on the connecting block (103), wherein the first push rod (104) pushes the top mold body (101) away from the middle mold body (201); A circulation cavity (105) is arranged inside the top mold body (101), and a circulation pipe (106) is arranged on the side of the top mold body (101). There are two circulation pipes (106), the two circulation pipes (106) are symmetrically distributed, and the circulation pipes (106) are connected to the circulation cavity (105); Liquid is injected into the circulation pipe (106) on one side, and liquid is discharged from the circulation pipe (106) on the other side to form a circulation, and the liquid is close to the molding cavity (102).

2. The batch injection molding mold for wine bottle packaging caps according to claim 1, characterized in that: The central hole column (202) is made of heat-conducting metal, and the length of the central hole column (202) does not exceed the length of the gas injection needle (302).

3. The batch injection molding mold for wine bottle packaging caps according to claim 1, characterized in that: The diameter of the gas injection needle (302) is equal to the diameter of the needle through hole (203), and a gap is left between the outer surface of the gas injection needle (302) and the inner wall of the forming cavity (102) and the outer surface of the central hole column (202).

4. The batch injection molding mold for wine bottle packaging caps according to claim 3 is characterized by: Both ends of the air intake pipe (304) are rigid pipes, and the middle section of the air intake pipe (304) is a corrugated pipe.

5. The batch injection molding mold for wine bottle packaging caps according to claim 1, characterized in that: The second push rod (305) is arranged in a staggered manner with the first push rod (104), and the second push rod (305) drives the tail mold body (301) to move away from the middle mold body (201).

6. The batch injection molding mold for wine bottle packaging caps according to claim 1, characterized in that: The gas filled into the air inlet pipe (304) is an inert gas, which is slowly and intermittently ejected from the mouth of the gas injection needle (302).

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