Injection molding equipment for producing anti-flatulence plastic feeding bottle and molding process of injection molding equipment

Abstract

The invention relates to the technical field of plastic feeding bottle forming equipment, in particular to injection molding equipment for producing an anti-flatulence plastic feeding bottle and a forming process of the injection molding equipment. The lower die is rotationally arranged on the upper end face of the workbench; the forming cavities are formed in the lower mold, the number of the forming cavities is N, and the N forming cavities are annularly arranged at equal intervals; the upper mold is arranged right above one of the forming cavities; the first air cylinder is fixedly arranged on the workbench, and the lower driving end of the first air cylinder is connected with the upper die; the forming rod assembly is arranged on the lower mold; through the arrangement of the forming rod assembly, the forming rod assembly is used for forming a mounting hole in the formed feeding bottle and also used for discharging flatulence in the feeding bottle and the forming cavity, so that it is ensured that gas can be discharged in time, and it is ensured that the high-quality feeding bottle is prepared.

Description

Technical Field

[0001] The invention relates to the technical field of plastic milk bottle molding equipment, in particular to injection molding equipment and a molding process for producing anti-flatulence plastic milk bottles. Background Art

[0002] Plastic has the advantages of light weight, low density, high strength, high rigidity, good insulation, colorability and easy molding. It has become one of the fastest-growing materials in the 21st century. Plastic parts of various shapes and colors have appeared in my country's industry, agriculture and daily life. A baby bottle is a utensil used to hold milk, generally for babies. The baby bottle itself does not contain a nipple, but only refers to the bottle body, but generally manufacturers of baby bottles will give a nipple with the bottle. For baby bottles, in terms of raw materials, they can be divided into: glass bottles, plastic bottles and silicone bottles. Among them, the materials of plastic bottles are generally PC, PP, PES, PPSU and silicone. One of the great advantages of plastic bottles is that they are light, not easy to break, and suitable for going out and when babies feed themselves. Plastic bottles are generally processed by injection molding.

[0003] During the injection molding process of a baby bottle, the gas in the molding cavity cannot be discharged in time, which is called flatulence (trapped gas). The residual gas will be trapped in the plastic solution, forming pores or bubbles inside or on the surface of the product, affecting the appearance and surface quality of the baby bottle. The presence of pores will also reduce the mechanical properties of the baby bottle, reduce its strength and toughness, and may cause the baby bottle to break during use. In order to solve the above problems, the present invention proposes an injection molding device and a molding process for producing anti-flatulence plastic baby bottles. Summary of the invention

[0004] To achieve the above object, the present invention provides an injection molding device for producing an anti-flatulence plastic milk bottle, comprising:

[0005] Workbench;

[0006] A lower mold is rotatably disposed on the upper end surface of the workbench;

[0007] A molding cavity is provided on the lower mold, the number of the molding cavities is N, the N molding cavities are arranged in an equidistant ring shape, and N is a positive integer greater than or equal to 3;

[0008] An upper mold is arranged directly above one of the molding cavities;

[0009] A first cylinder is fixedly mounted on the workbench, wherein a driving lower end of the first cylinder is connected to the upper mold;

[0010] The forming rod assembly is arranged on the lower mold. The number of the forming rod assembly and the forming cavity is matched with each other. The forming rod assembly is used to form a mounting hole on the formed milk bottle and to release the flatulence in the milk bottle and the forming cavity.

[0011] Optionally, the forming rod assembly is movably connected to the lower mold, and the forming rod assembly includes

[0012] A first forming rod, movably plugged into the lower mold, wherein a first end of the first forming rod extends into the molding cavity, a second end of the first forming rod extends out of the lower mold, and a first cavity is formed inside the first forming rod;

[0013] A second forming rod is fixed to the second end of the first forming rod, a second cavity is formed inside the second forming rod, and M air outlet holes are formed on the second forming rod, the air outlet holes are connected to the second cavity, and M is a positive integer greater than or equal to 2;

[0014] The blocking mesh cover is arranged on the first end of the first forming rod, and the mesh holes on the blocking mesh cover are used for connecting the first cavity with the forming cavity.

[0015] Optionally, it further includes a push-pull mechanism, which is used to drive the molding rod assembly to move out of the molding cavity during demoulding. The push-pull mechanism includes

[0016] Second cylinder;

[0017] An L-shaped fixing rod, one end of which is fixedly connected to the outer side wall of the second cylinder, and the other end of which is fixedly connected to the lower mold;

[0018] The cylinder arm is connected to the driving end of the second cylinder, and one end of the cylinder arm away from the second cylinder is connected to the forming rod assembly.

[0019] Optionally, a scraping mechanism is further included, which scrapes off the sediment in the mesh holes of the blocking mesh cover from the inner side of the blocking mesh cover to keep the mesh holes of the blocking mesh cover connected.

[0020] Optionally, the scraping mechanism includes

[0021] A driving motor is fixedly mounted on one end of the cylinder arm away from the second cylinder;

[0022] A U-shaped fixing rod, used for connecting the second forming rod and the driving motor;

[0023] A rotating rod is fixedly arranged on the driving end of the driving motor, and a free end of the rotating rod passes through the first cavity and the second cavity and extends into the blocking mesh cover;

[0024] The arc-shaped scraping plate is fixedly arranged on one end of the rotating rod located inside the blocking net cover. The arc-shaped scraping plate and the inner side wall of the blocking net cover are arranged to abut against each other, and a mounting groove is arranged on the arc-shaped scraping plate.

[0025] Optionally, it further includes a piercing mechanism disposed in the blocking mesh cover, the piercing mechanism is used to further clear the mesh holes of the blocking mesh cover, and the piercing mechanism includes

[0026] A supporting plate assembly is movably arranged in the blocking mesh cover, a first through hole is opened on the supporting plate assembly, and the rotating rod is movably inserted in the first through hole;

[0027] A puncture needle, fixedly arranged on the supporting plate assembly;

[0028] A second through hole is provided on the arc-shaped scraping plate, the piercing needle is movably inserted into the second through hole, and the second through hole is matched with the piercing needle;

[0029] A return spring is wound around the outside of the rotating rod, one end of the return spring is fixedly connected to the supporting plate assembly, and the other end of the return spring is fixedly connected to the side wall of the rotating rod.

[0030] Optionally, the support plate assembly includes

[0031] A rigid support plate, wherein the rigid support plate and the return spring are connected to each other;

[0032] The elastic supporting plate is fixedly arranged on the rigid supporting plate, and the elastic supporting plate is fixedly connected to the piercing needle.

[0033] Optionally, it also includes a pinhole linkage mechanism, which is used to drive the support plate assembly to move the puncture needle into the mesh of the blocking mesh cover. The pinhole linkage mechanism includes

[0034] A first abutment rod, fixedly mounted on the wall of the first cavity, wherein the first abutment rod is provided with an inclined groove;

[0035] A second resistance rod is fixed on the rigid support plate;

[0036] The circular head is fixedly arranged on an end of the second abutment rod away from the rigid support plate.

[0037] Optionally, the number of the first interference rods is set to be multiple, the multiple first interference rods are arranged in a ring shape with equal distances, and the inclination directions of the multiple inclined grooves are consistent.

[0038] To achieve the above object, the present invention provides an injection molding process for producing an anti-flatulence plastic milk bottle, and the milk bottle is prepared by using the injection molding equipment for producing an anti-flatulence plastic milk bottle, comprising the following steps:

[0039] S1: During injection molding, the molding rod assembly is inserted into the molded milk bottle to form a hole on the milk bottle;

[0040] S2: During the bottle forming process, the scraping mechanism and the piercing mechanism clear the mesh holes of the blocking mesh cover from the inner side of the blocking mesh cover to release the flatulence in the bottle and the forming cavity;

[0041] S3: When the bottle is demoulded after being formed, the push-pull mechanism pulls the forming rod assembly downward out of the mold to separate from the bottle.

[0042] The beneficial effects of the present invention are as follows:

[0043] The present invention improves the structure of the existing injection molding equipment for producing plastic milk bottles. The improved injection molding equipment for producing plastic milk bottles can play a role in preventing flatulence, that is, by adding a molding rod assembly to the lower mold, the molding rod assembly is arranged to form a mounting hole on the molded milk bottle and to release flatulence in the milk bottle and the molding cavity, thereby ensuring that the gas can be discharged in time and ensuring the preparation of high-quality milk bottles. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the structure of an embodiment of an injection molding device for producing an anti-flatulence plastic milk bottle according to the present invention;

[0045] Figure 2 Injection molding equipment for producing anti-flatulence plastic milk bottles of the present invention Figure 1 A schematic diagram of the structure of the middle forming rod assembly;

[0046] Figure 3 Injection molding equipment for producing anti-flatulence plastic milk bottles of the present invention Figure 2 A schematic diagram of the partial structure of the middle forming rod assembly;

[0047] Figure 4 It is a schematic diagram of the structure of a push-pull mechanism for driving a molding rod assembly in an injection molding device for producing an anti-flatulence plastic milk bottle of the present invention;

[0048] Figure 5 It is a structural schematic diagram of a scraping mechanism disposed between a molding rod assembly and a push-pull mechanism in an injection molding device for producing an anti-flatulence plastic milk bottle of the present invention;

[0049] Figure 6 Injection molding equipment for producing anti-flatulence plastic milk bottles of the present invention Figure 5 A schematic diagram of the enlarged structure in the middle;

[0050] Figure 7 It is a partial enlarged structural schematic diagram of a scraping mechanism disposed inside a molding rod assembly of an injection molding device for producing an anti-flatulence plastic milk bottle of the present invention;

[0051] Figure 8 It is a structural schematic diagram of a piercing mechanism provided inside a molding rod assembly in an injection molding device for producing an anti-flatulence plastic milk bottle of the present invention;

[0052] Fig. 9 The present invention is an injection molding process flow chart for producing an anti-flatulence plastic feeding bottle.

[0053] Description of Reference Numerals

[0054] Lower mold 1, molding cavity 2, molding rod assembly 3, first molding rod 31, second molding rod 32, first cavity 33, second cavity 34, air outlet 35, blocking mesh cover 36, upper mold 4, first cylinder 5, workbench 6, push-pull mechanism 7, second cylinder 71, L-shaped fixing rod 72, cylinder arm 73, scraping mechanism 8, drive motor 81, rotating rod 82, U-shaped fixing rod 83, arc scraping plate 84, mounting groove 85, piercing mechanism 9, support plate assembly 91, rigid support plate 911, elastic support plate 912, first through hole 92, piercing needle 93, second through hole 94, reset spring 95, needle hole linkage mechanism 10, first resistance rod 101, inclined groove 102, second resistance rod 103, round head 104. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0056] In view of the problems existing in the prior art, the embodiments of the present invention provide an injection molding device for producing anti-flatulence plastic milk bottles, such as Figure 1 and Figure 2 As shown, the injection molding equipment for producing the anti-flatulence plastic milk bottle includes a workbench 6;

[0057] The lower mold 1 is rotatably disposed on the upper end surface of the workbench 6;

[0058] The molding cavity 2 is provided on the lower mold 1, and the number of the molding cavities 2 is N, and the N molding cavities 2 are arranged in an equidistant ring shape, and N is a positive integer greater than or equal to 3;

[0059] The upper mold 4 is arranged directly above one of the molding cavities 2;

[0060] The first cylinder 5 is fixed on the workbench 6, and the driving lower end of the first cylinder 5 is connected to the upper mold 4;

[0061] The molding rod assembly 3 is arranged on the lower mold 1, and the number of the molding rod assembly 3 and the molding cavity 2 are matched with each other. The molding rod assembly 3 is used to form a mounting hole on the molded milk bottle and to relieve the flatulence in the milk bottle and the molding cavity 2.

[0062] In one embodiment, Figure 3 As shown, the forming rod assembly 3 is movably plugged into the lower mold 1, and the forming rod assembly 3 includes a first forming rod 31, which is movably plugged into the lower mold 1, a first end of the first forming rod 31 extends into the forming cavity 2, a second end of the first forming rod 31 extends out of the lower mold 1, and a first cavity 33 is opened inside the first forming rod 31;

[0063] The second forming rod 32 is fixed to the second end of the first forming rod 31. A second cavity 34 is formed inside the second forming rod 32. M air outlet holes 35 are formed on the second forming rod 32. The air outlet holes 35 are connected to the second cavity 34. M is a positive integer greater than or equal to 2.

[0064] The blocking mesh cover 36 is disposed on the first end of the first forming rod 31 , and the mesh holes on the blocking mesh cover 36 are used to connect the first cavity 33 with the forming cavity 2 .

[0065] During operation, the gas in the milk bottle and the molding cavity 2 will enter the first cavity 33 and the second cavity 34 through the mesh of the blocking mesh cover 36 during the injection molding process, and will be discharged to the outside of the lower mold 1 through the air outlet 35. The structural design of the present invention is reasonable. Due to the presence of the molten material, the pressure in the molding cavity 2 is greater than the pressure of the external environment. Therefore, it can prevent external gas from entering the molding cavity 2 through the mesh of the blocking mesh cover 36, and at the same time, it can more quickly and timely discharge the gas in the molding cavity 2 and the milk bottle to the environment.

[0066] In one embodiment, Figure 4As shown, the injection molding equipment for producing the anti-flatulence plastic milk bottle further includes a push-pull mechanism 7, which is used to drive the molding rod assembly 3 to move out of the molding cavity 2 during demoulding, and the push-pull mechanism 7 includes a second cylinder 71.

[0067] One end of the L-shaped fixing rod 72 (which can be understood as the right end) is fixedly connected to the outer wall of the second cylinder 71, and the other end of the L-shaped fixing rod 72 (which can be understood as the left end) is fixedly connected to the lower mold 1. The setting of the L-shaped fixing rod 72 is used to fix the second cylinder 71.

[0068] The cylinder arm 73 is connected to the driving end of the second cylinder 71 , and one end of the cylinder arm 73 away from the second cylinder 71 is connected to the forming rod assembly 3 .

[0069] When working, the start of the second cylinder 71 will drive the cylinder arm 73 to move left or right, and the movement of the cylinder arm 73 will drive the forming rod assembly 3 to move left or right. The rightward movement of the forming rod assembly 3 is for the purpose of achieving the effect of convenient demolding during demolding. At the same time, holes can be formed on the milk bottle, which can avoid the need to add a punching process to punch holes in the milk bottle as in the prior art. This can improve the production efficiency of the milk bottle on the one hand, and reduce the production cost on the other hand.

[0070] In one embodiment, if Figure 5 , Figure 6 and Figure 7 As shown, the injection molding equipment for producing the anti-flatulence plastic milk bottle further includes a scraping mechanism 8, which scrapes off the sediment in the mesh of the blocking mesh 36 from the inner side of the blocking mesh 36 to keep the mesh of the blocking mesh 36 connected.

[0071] In one embodiment, the scraping mechanism 8 includes a driving motor 81, and the driving motor 81 is fixedly arranged on an end of the cylinder arm 73 away from the second cylinder 71;

[0072] The U-shaped fixing rod 83 is used to connect the second shaping rod 32 and the driving motor 81;

[0073] The rotating rod 82 is fixedly arranged on the driving end of the driving motor 81, and the free end (which can be understood as the left end) of the rotating rod 82 passes through the first cavity 33 and the second cavity 34 and extends into the blocking mesh cover 36;

[0074] The arc scraper plate 84 is fixed on one end (which can be understood as the left end) of the rotating rod 82 inside the blocking mesh cover 36 , and the arc scraper plate 84 and the inner side wall of the blocking mesh cover 36 are arranged to abut against each other, and a mounting groove 85 is opened on the arc scraper plate 84 .

[0075] During operation, the driving motor 81 will cause the rotating rod 82 to rotate, and the rotation of the rotating rod 82 will cause the arc scraping plate 84 to rotate. The rotation of the arc scraping plate 84 will scrape off the sediment in the mesh of the blocking mesh cover 36, thereby clearing the mesh of the blocking mesh cover 36.

[0076] In one example, the arc-shaped scraper plate 84 is in a strip shape.

[0077] In one embodiment, Figure 8 As shown, the injection molding equipment for producing the anti-flatulence plastic bottle also includes a piercing mechanism 9 arranged in the blocking mesh cover 36, and the piercing mechanism 9 is used to further clear the mesh holes of the blocking mesh cover 36. The piercing mechanism 9 includes a supporting plate assembly 91, and the supporting plate assembly 91 is movably arranged in the blocking mesh cover 36. A first through hole 92 is opened on the supporting plate assembly 91, and the rotating rod 82 is movably inserted in the first through hole 92.

[0078] The piercing needle 93 is fixedly disposed on the supporting plate assembly 91;

[0079] The second through hole 94 is formed on the arc-shaped scraping plate 84, and the piercing needle 93 is movably inserted into the second through hole 94, and the second through hole 94 is matched with the piercing needle 93;

[0080] The return spring 95 is wound around the outside of the rotating rod 82, one end of the return spring 95 (which can be understood as the left end) is fixedly connected to the support plate assembly 91, and the other end of the return spring 95 (which can be understood as the right end) is fixedly connected to the side wall of the rotating rod 82.

[0081] In one embodiment, the support plate assembly 91 includes a rigid support plate 911, and the rigid support plate 911 is connected to the return spring 95. The elastic support plate 912 is fixedly arranged on the rigid support plate 911, and the elastic support plate 912 is fixedly connected to the piercing needle 93. The presence of the rigid support plate 911 can prevent the piercing needle 93 from excessively piercing the formed milk bottle.

[0082] In one embodiment, Figure 8As shown, the injection molding equipment for producing anti-flatulence plastic milk bottles further includes a pinhole linkage mechanism 10, which is used to drive the support plate assembly 91 to move the puncture needle 93 into the mesh of the blocking mesh cover 36, and the pinhole linkage mechanism 10 includes a first resistance rod 101, which is fixedly arranged on the wall of the first cavity 33, and is provided with an inclined groove 102; the second resistance rod 103 is fixedly arranged on the rigid support plate 911. The round head 104 is fixedly arranged on one end of the second resistance rod 103 away from the rigid support plate 911.

[0083] During operation, as the support plate assembly 91 rotates, the second resistance rod 103 and the round head 104 will also rotate. When the second resistance rod 103 and the round head 104 abut against the inclined groove 102, as the rotation continues, the second resistance rod 103 and the round head 104 will push the support plate assembly 91 to move to the left. The leftward movement of the support plate assembly 91 will bring the puncture needle 93 to move to the left and enter the mesh of the blocking mesh cover 36, thereby achieving the effect of clearing the mesh of the blocking mesh cover 36.

[0084] In one embodiment, the number of the first resisting rods 101 is set to be several, the several first resisting rods 101 are arranged in an equidistant ring shape, and the inclined directions of the several inclined grooves 102 are consistent. This arrangement can ensure that the dredging process is more frequent, thereby achieving a better dredging effect.

[0085] In view of the problems existing in the existing technology, such as Fig. 9 As shown, an embodiment of the present invention provides an injection molding process for producing an anti-flatulence plastic milk bottle, and the milk bottle is prepared by using the injection molding equipment for producing an anti-flatulence plastic milk bottle, including the following steps:

[0086] S1: During injection molding, the molding rod assembly 3 is inserted into the molded milk bottle to form a hole on the milk bottle;

[0087] S2: During the bottle forming process, the scraping mechanism 8 and the piercing mechanism 9 clear the mesh holes of the blocking mesh cover 36 from the inner side of the blocking mesh cover 36 to discharge the flatulence in the bottle and the forming cavity 2;

[0088] S3: When the bottle is demoulded after being formed, the push-pull mechanism 7 pulls the forming rod assembly 3 to move out of the lower mold 1 and away from the bottle.

[0089] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. An injection molding device for producing anti-flatulence plastic milk bottles, characterized in that: include Workbench (6); A lower mold (1) is rotatably disposed on the upper end surface of the workbench (6); A molding cavity (2) is arranged on the lower mold (1), the number of the molding cavities (2) is N, the N molding cavities (2) are arranged in an equidistant ring shape, and N is a positive integer greater than or equal to 3; An upper mold (4) is arranged directly above one of the molding cavities (2); A first cylinder (5) is fixedly mounted on the workbench (6), wherein a driving lower end of the first cylinder (5) is connected to the upper mold (4); A molding rod assembly (3) is arranged on the lower mold (1), and the number of the molding rod assemblies (3) and the molding cavities (2) are matched with each other. The molding rod assembly (3) is used to form a mounting hole on the molded milk bottle and to relieve flatulence in the milk bottle and the molding cavity (2).

2. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 1, characterized in that: The forming rod assembly (3) is movably plugged into the lower mold (1), and the forming rod assembly (3) comprises A first molding rod (31) is movably plugged into the lower mold (1), a first end of the first molding rod (31) extends into the molding cavity (2), a second end of the first molding rod (31) extends outside the lower mold (1), and a first cavity (33) is formed inside the first molding rod (31); A second forming rod (32) is fixed on the second end of the first forming rod (31), a second cavity (34) is provided inside the second forming rod (32), and M air outlet holes (35) are provided on the second forming rod (32), the air outlet holes (35) are communicated with the second cavity (34), and M is a positive integer greater than or equal to 2; A blocking mesh cover (36) is arranged on the first end of the first forming rod (31), and the mesh holes on the blocking mesh cover (36) are used to connect the first cavity (33) with the forming cavity (2).

3. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 2, characterized in that: It also includes a push-pull mechanism (7), which is used to drive the molding rod assembly (3) to move out of the molding cavity (2) during demoulding. The push-pull mechanism (7) includes A second cylinder (71); An L-shaped fixing rod (72), one end of the L-shaped fixing rod (72) being fixedly connected to the outer side wall of the second cylinder (71), and the other end of the L-shaped fixing rod (72) being fixedly connected to the lower mold (1); The cylinder arm (73) is interconnected with the driving end of the second cylinder (71), and one end of the cylinder arm (73) away from the second cylinder (71) is interconnected with the forming rod assembly (3).

4. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 3, characterized in that: It also comprises a scraping mechanism (8), which scrapes off the sediment in the mesh of the blocking mesh (36) from the inner side of the blocking mesh (36) to keep the mesh of the blocking mesh (36) connected.

5. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 4, characterized in that: The scraping mechanism (8) comprises A driving motor (81) is fixedly mounted on an end of the cylinder arm (73) away from the second cylinder (71); A U-shaped fixing rod (83) used for connecting the second shaping rod (32) and the driving motor (81); A rotating rod (82) is fixedly mounted on the driving end of the driving motor (81), and a free end of the rotating rod (82) passes through the first cavity (33) and the second cavity (34) and extends into the blocking mesh cover (36); The arc-shaped scraper plate (84) is fixedly arranged on one end of the rotating rod (82) located inside the blocking mesh cover (36), the arc-shaped scraper plate (84) and the inner side wall of the blocking mesh cover (36) are arranged to abut against each other, and a mounting groove (85) is provided on the arc-shaped scraper plate (84).

6. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 5, characterized in that: It also includes a piercing mechanism (9) disposed in the blocking mesh cover (36), the piercing mechanism (9) being used to further clear the mesh holes of the blocking mesh cover (36), the piercing mechanism (9) comprising A support plate assembly (91) is movably disposed in the blocking mesh cover (36); a first through hole (92) is formed on the support plate assembly (91); and the rotating rod (82) is movably inserted into the first through hole (92); A puncture needle (93) fixedly arranged on the support plate assembly (91); A second through hole (94) is provided on the arc-shaped scraping plate (84), the piercing needle (93) is movably inserted into the second through hole (94), and the second through hole (94) and the piercing needle (93) are matched and arranged; A return spring (95) is wound around the outside of the rotating rod (82), one end of the return spring (95) is fixedly connected to the supporting plate assembly (91), and the other end of the return spring (95) is fixedly connected to the side wall of the rotating rod (82).

7. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 6, characterized in that: The support plate assembly (91) comprises A rigid support plate (911), wherein the rigid support plate (911) and the return spring (95) are connected to each other; The elastic support plate (912) is fixedly arranged on the rigid support plate (911), and the elastic support plate (912) is fixedly connected to the puncturing needle (93).

8. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 7, characterized in that: It also includes a pinhole linkage mechanism (10), which is used to drive the support plate assembly (91) to move the puncture needle (93) into the mesh of the blocking mesh cover (36). The pinhole linkage mechanism (10) includes A first abutment rod (101) is fixedly mounted on the wall of the first cavity (33), and an inclined groove (102) is formed on the first abutment rod (101); A second resisting rod (103) is fixedly mounted on the rigid supporting plate (911); The circular head (104) is fixedly arranged on an end of the second abutment rod (103) away from the rigid support plate (911).

9. The injection molding equipment for producing anti-flatulence plastic milk bottles according to claim 8, characterized in that: The number of the first interference rods (101) is set to be a plurality, the plurality of the first interference rods (101) are arranged in an equidistant ring shape, and the inclination directions of the plurality of inclined grooves (102) are consistent.

10. An injection molding process for producing anti-flatulence plastic milk bottles, characterized in that: The injection molding equipment for producing anti-flatulence plastic milk bottles according to any one of claims 1 to 9 is used to prepare milk bottles, comprising the following steps: S1: During injection molding, the molding rod assembly (3) is inserted into the molded milk bottle to form a hole in the milk bottle; S2: During the bottle forming process, the scraping mechanism (8) and the piercing mechanism (9) clear the mesh holes of the blocking mesh cover (36) from the inner side of the blocking mesh cover (36) to discharge the flatulence in the bottle and the forming cavity (2); S3: When the bottle is demoulded after being formed, the push-pull mechanism (7) pulls the forming rod assembly (3) to move out of the lower mold (1) and away from the bottle.

Images