PET bottle blow molding device

Abstract

The utility model discloses a PET bottle blow molding device relates to PET bottle blow molding technical field, including equipment cabinet, mould and PET bottle body, the number of mould is two, PET bottle body is provided in the inside of two mould, the inner side of clamping plate is provided with the neck, the inner wall of clamping plate is threaded connection screw rod, and the screw rod is connected with the inside of clamping plate. An output shaft of the motor is connected with one end of the lead screw, one end of the positioning bolt is connected with a check block, the check block is matched with the clamping groove, through cooperation of the motor, the clamping plate, the clamping groove and the check block, after the two molds are closed, the lead screw is driven to rotate through the motor as a power source, and power is provided for the upward moving position of the clamping plate after the lead screw rotates. The clamping grooves wrap the check blocks, the check blocks provide resistance for the clamping plates, and the two molds are pulled together through the clamping plates and the check blocks, so that the two molds can resist larger expansion force, the stability of the two molds after mold closing is improved, and the production qualification rate of PET bottles is increased.

Description

Technical Field

[0001] This utility model relates to the field of PET bottle blow molding technology, specifically to a PET bottle blow molding apparatus. Background Technology

[0002] PET bottles are plastic bottles made of polyethylene terephthalate (PET), widely used in the packaging of beverages, food, chemicals, and pharmaceuticals. PET bottles possess excellent transparency, high strength, impact resistance, and dimensional stability, capable of withstanding certain pressure and weight without easily breaking or deforming. They offer good barrier properties against gases such as oxygen and carbon dioxide, effectively preventing oxidation and deterioration of the contents. Furthermore, they exhibit good chemical corrosion resistance, resisting the erosion of various acid and alkali solutions. PET bottles are recyclable materials with a high recycling rate and reuse value, meeting environmental protection requirements. They are widely used in packaging carbonated beverages, drinking water, fruit juices, and tea drinks. Due to their lightweight, transparency, and unbreakability, PET bottles are popular with consumers. They can also be used to package condiments such as edible oils, soy sauce, and vinegar, as well as foods such as candies and biscuits, effectively protecting food quality and safety. PET bottles also have good corrosion resistance, making them suitable for packaging various chemical products such as detergents, cosmetics, and pesticides, offering excellent sealing, corrosion resistance, and safety.

[0003] The production process of PET bottles mainly includes injection molding and blow molding. First, PET raw materials are heated and melted, then injected into a mold to form a preform. The preform is then heated to a certain temperature and blow-molded to expand and form a bottle. During blow molding, molds are used to shape the PET bottle to achieve the desired shape. The PET preform is encased in two molds, and high-pressure gas is injected into it, causing the preform to expand and contact the inner wall of the mold. Once the preform is restrained by the mold, it achieves the desired shape. While the mold restricts the further expansion of the preform, it also bears the expansion force from the preform. This expansion force may cause the mold to separate, resulting in bulges on the PET bottle's appearance, creating defects and reducing the overall quality of PET bottle production. Therefore, a PET bottle blow molding device is urgently needed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a PET bottle blow molding apparatus to solve the problem mentioned in the background art, where the mold itself bears the expansion force from the PET preform, which may cause the mold to separate. Mold separation can lead to bulges on the PET bottle appearance, resulting in defects in the PET bottle, leading to the production of defective PET bottles and reducing the production quality of PET bottles.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a PET bottle blow molding device, comprising a cabinet, molds, and a PET bottle body. Two molds are arranged symmetrically inside the cabinet. The PET bottle body is disposed inside the two molds. A first hydraulic cylinder is installed on one side of the cabinet's exterior. The output end of the first hydraulic cylinder is connected to one side of the mold. A slide is connected to one side of one of the mold bodies. A clamping plate is slidably connected to the inner wall of the slide. A clamping groove is formed on the inner side of the clamping plate. A lead screw is connected to the inner wall of the mold body. The end of the lead screw is slidably connected to the inner wall of the slide. A motor is installed on one side of the slide, and the output shaft of the motor is connected to one end of the lead screw. A support base is connected to another side of the mold body. A positioning bolt is threaded to the inner wall of the support base. A stop block is connected to one end of the positioning bolt, and the stop block is adapted to the slot. Four first guide rods are connected to one side of the mold, and the four first guide rods are located at the four corners of the mold. The same number of sliding sleeves as the first guide rods are connected to the outer side of the cabinet. The first guide rods slide through the inner wall of the cabinet and the sliding sleeves.

[0006] A second hydraulic cylinder is installed above the cabinet. The output end of the second hydraulic cylinder is connected to a clamp, which is located inside the cabinet. One end of the PET bottle body is located inside the clamp.

[0007] A blower head is installed above the clamp, with one end of the blower head located inside the PET bottle body, and the other end of the blower head located outside the PET bottle body connected to a high-pressure air pipe.

[0008] The stop block is located on one side of the support base and is connected to four second guide rods, with the four second guide rods located at the four corners of the stop block. The outer surface of the second guide rods is slidably connected to the inner wall of the support base.

[0009] A collection box is slidably connected to the inner wall of the cabinet, and a handle is connected to one side of the collection box.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. The PET bottle blow molding device of this utility model, through the cooperation between the motor, the clamping plate, the clamping groove and the stop block, after the two molds are closed, the motor drives the lead screw to rotate. After the lead screw rotates, it provides power for the clamping plate to move upward. After the clamping plate moves upward, the clamping groove wraps around the stop block, and the stop block provides resistance to the clamping plate. The clamping plate and the stop block pull the two molds together, so that the two molds can resist greater expansion force, improve the stability of the two molds after they are closed, and improve the PET bottle production qualification rate.

[0012] 2. The PET bottle blow molding device of this utility model provides support for the first guide rod through the cooperation between the first guide rod and the sliding sleeve, thereby maintaining the stability of the first guide rod during sliding. The first guide rod provides support for the mold, thereby maintaining the stability of the mold and preventing the mold from moving at an angle, which could lead to misalignment between the molds and improve the accuracy of mold closing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the blow nozzle structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the support structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the stop block structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the card plate structure of this utility model.

[0018] In the diagram: 1. Cabinet; 2. Mold; 3. PET bottle body; 4. First hydraulic cylinder; 5. Slide; 6. Clamping plate; 7. Slot; 8. Lead screw; 9. Motor; 10. Support base; 11. Positioning bolt; 12. Stop block; 13. Second hydraulic cylinder; 14. Clamp; 15. Blow head; 16. High-pressure air pipe; 17. First guide rod; 18. Sliding sleeve; 19. Second guide rod; 20. Collection box; 21. Handle. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-5 This utility model provides a PET bottle blow molding device, including a cabinet 1, a mold 2 and a PET bottle body 3. There are two molds 2, which are set inside the cabinet 1 and are symmetrical to each other. The PET bottle body 3 is set inside the two molds 2. The molds 2 have cavities inside, through which the PET bottle body 3 is plasticized. The two molds 2 are joined together to wrap the PET bottle preform inside. After the PET bottle preform is plasticized, the two molds 2 are separated to take out the plasticized PET bottle body 3.

[0021] A first hydraulic cylinder 4 is installed on one side of the outside of the cabinet 1. The output end of the first hydraulic cylinder 4 is connected to one side of the mold 2. The first hydraulic cylinder 4 serves as the power source to provide power for the mold 2 to move.

[0022] One of the mold bodies 2 is connected to a slide 5 on one side. A clamping plate 6 is slidably connected to the inner wall of the slide 5. The slide 5 provides support for the clamping plate 6 and maintains the stability of the slide 5. The slide 5 is composed of two slide rods and two lugs. The lugs provide support for the slide rods and maintain the stability of the slide rods. The slide rods provide support for the clamping plate 6 and maintain the stability of the clamping plate 6.

[0023] The inner side of the card plate 6 is provided with a card slot 7. The inner wall of the card plate 6 is threadedly connected to the lead screw 8. The end of the lead screw 8 is slidably connected to the inner wall of the slide 5. A motor 9 is installed on one side of the slide 5. The output shaft of the motor 9 is connected to one end of the lead screw 8. The motor 9 is the power source to provide power for the rotation of the lead screw 8. While the lead screw 8 is rotating, it drives the card plate 6 to move.

[0024] Another mold 2 has a support base 10 connected to one side of its body. The inner wall of the support base 10 is threaded with a positioning bolt 11. One end of the positioning bolt 11 is connected to a stop 12. The support base 10 provides support force to the positioning bolt 11, maintaining the stability of the positioning bolt 11. The position of the stop 12 is changed by rotating the positioning bolt 11, and the distance between the stop 12 and the slot 7 is adjusted.

[0025] Furthermore, the stop block 12 is compatible with the slot 7, and the stop block 12 provides resistance to the card plate 6. The card plate 6 contacts the stop block 12 through the slot 7, and the slot 7 wraps the stop block 12 inside, pulling the two molds 2 together and improving the stability of the two molds 2 when they are closed.

[0026] A second hydraulic cylinder 13 is installed on the top of the cabinet 1. The output end of the second hydraulic cylinder 13 is connected to a chuck 14, and the chuck 14 is located inside the cabinet 1. One end of the PET bottle body 3 is located inside the chuck 14. The second hydraulic cylinder 13 is used as the power source to provide power for the movement of the chuck 14.

[0027] A blower head 15 is installed above the clamp 14, with one end of the blower head 15 located inside the PET bottle body 3 and the other end of the blower head 15 located outside the PET bottle body 3 connected to a high-pressure air pipe 16. The clamp 14 provides support and fixation for the PET bottle body 3, and the high-pressure air pipe 16 provides high-pressure gas to the blower head 15. The blower head 15 delivers high-pressure gas to the inside of the PET bottle body 3, causing the PET bottle body 3 to deform and expand.

[0028] Four first guide rods 17 are connected to one side of the mold 2, and the four first guide rods 17 are located at the four corners of the mold 2. The same number of sliding sleeves 18 as the first guide rods 17 are connected to one side of the cabinet 1 outside. The first guide rods 17 slide through the cabinet 1 and are slidably connected to the inner wall of the sliding sleeves 18. The sliding sleeves 18 provide support for the first guide rods 17, maintain the stability of the first guide rods 17 when sliding, and provide support for the mold 2, maintain the stability of the mold 2.

[0029] The stop block 12 is located on one side of the support base 10 and is connected to four second guide rods 19. The four second guide rods 19 are located at the four corners of the stop block 12. The outer surface of the second guide rods 19 is slidably connected to the inner wall of the support base 10. The second guide rods 19 provide support force to the stop block 12, maintain the stability of the stop block 12, and prevent the positioning bolt 11 from changing the angle of the stop block 12 when rotating, which would make it difficult for the slot 7 to contact the stop block 12. The second guide rods 19 provide resistance to the stop block 12, limiting the stop block 12 from rotating with the positioning bolt 11.

[0030] A collection box 20 is slidably connected to the inner wall of the cabinet 1. A handle 21 is connected to one side of the collection box 20. The blow-molded PET bottle bodies 3 are collected through the collection box 20, and the blow-molded PET bottle bodies 3 are collected together for easy unified storage. The handle 21 makes it easy to move the collection box 20.

[0031] Working principle: First, the PET preform is placed on the outside of the blow head 15. Then, the PET preform is placed inside the clamp 14. The second hydraulic cylinder 13 is activated to move the clamp 14. At the same time, the PET preform is moved to a horizontal position in the mold 2. Then, the first hydraulic cylinder 4 is activated to push the two molds 2 closer together. The two molds 2 then wrap the PET preform inside. The motor 9 is activated to rotate. The rotation of the motor 9 drives the lead screw 8 to rotate simultaneously. The rotation of the lead screw 8 pushes the clamping plate 6 to move upward. Then, the clamping groove 7 wraps the stop block 12 inside. High-pressure gas is then delivered to the inside of the blow head 15 through the high-pressure pipe. The blow head 15 injects high-pressure gas into the inside of the PET preform, causing the PET preform to expand until it is in complete contact with the cavity inside the mold 2. Then, the mold 2 is opened and the blow-molded PET bottle body 3 is taken out.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A PET bottle blow molding apparatus, comprising a cabinet (1), a mold (2), and a PET bottle body (3), characterized in that: There are two molds (2), which are arranged inside the cabinet (1) and are symmetrical. The PET bottle body (3) is arranged inside the two molds (2). A first hydraulic cylinder (4) is installed on one side of the cabinet (1). The output end of the first hydraulic cylinder (4) is connected to one side of the mold (2). A slide (5) is connected to one side of the body of one of the molds (2). A clamping plate (6) is slidably connected to the inner wall of the slide (5). A clamping groove (7) is opened on the inner side of the clamping plate (6). A screw rod (8) is threadedly connected to the inner wall of the clamping plate (6). The end of the screw rod (8) is slidably connected to the inner wall of the slide (5). A motor (9) is installed on one side of the mold (2), and the output shaft of the motor (9) is connected to one end of the lead screw (8). A support base (10) is connected to one side of the mold (2), and a positioning bolt (11) is threadedly connected to the inner wall of the support base (10). A stop block (12) is connected to one end of the positioning bolt (11), and the stop block (12) is adapted to the slot (7). Four first guide rods (17) are connected to one side of the mold (2), and the four first guide rods (17) are located at the four corners of the mold (2). The same number of sliding sleeves (18) as the first guide rods (17) are connected to the outside of the cabinet (1). The first guide rods (17) slide through the inner wall of the cabinet (1) and slide in a sliding connection.

2. The PET bottle blow molding apparatus according to claim 1, wherein: A second hydraulic cylinder (13) is installed above the cabinet (1). The output end of the second hydraulic cylinder (13) is connected to a clamp (14), and the clamp (14) is located inside the cabinet (1). One end of the PET bottle body (3) is located inside the clamp (14).

3. The PET bottle blow molding apparatus of claim 2, wherein: A blower (15) is installed above the clamp (14), and one end of the blower (15) is located inside the PET bottle body (3). The end of the blower (15) located outside the PET bottle body (3) is connected to a high-pressure air pipe (16).

4. The PET bottle blow molding apparatus of claim 1, wherein: The stop block (12) is located on one side of the support base (10) and is connected to four second guide rods (19), and the four second guide rods (19) are located at the four corners of the stop block (12). The outer surface of the second guide rods (19) is slidably connected to the inner wall of the support base (10).

5. The PET bottle blow molding apparatus of claim 1, wherein: A collection box (20) is slidably connected to the inner wall of the cabinet (1), and a handle (21) is connected to one side of the collection box (20).

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