Anti-bursting blow molding device for plastic bottle body

Abstract

The utility model belongs to the technical field of blow molding, and particularly relates to an anti-burst blow molding device for a plastic bottle body, which comprises a base and two blow molding molds, a portal frame is fixedly connected to the top of the base, an opening and closing assembly is arranged between the base and the two blow molding molds, cooling assemblies are arranged on the blow molding molds, and the portal frame is fixedly connected with the base. Two upper air cylinders are fixedly connected to the inner wall of the top of the portal frame, the same mounting plate is fixedly connected to output shafts of the two upper air cylinders, and an air pump is fixedly connected to the top of the mounting plate. The plastic bottle blowing device is reasonable in structural design, the blowing speed of blow molding and the total amount of entering gas can be regulated and controlled, the situation that plastic bottle blanks are blown to be broken due to the fact that the blowing speed is too high and the total amount of entering gas is too large is avoided, and therefore the qualification rate of plastic bottle body manufacturing is improved; and in addition, the plastic bottle body subjected to blow molding can be quickly cooled and demolded, and the using effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding, in particular to a blow molding device for preventing expansion and bursting of plastic bottles. Background Art

[0002] In the prior art, during the blow molding process of a plastic bottle, the preform must first be placed in a predetermined position in the corresponding mold. The molds are then closed and the preform is heated, blown, cooled, and then opened to produce the desired plastic bottle. Patent number CN218615368U discloses a plastic bottle blow molding device characterized by comprising a first mold assembly and a second mold assembly positioned opposite each other, the two mold assemblies being capable of being assembled into a mold body, the mold body being provided with a mold cavity, fins extending outward from the outer walls of the two mold assemblies, and a heat dissipation space being left between each adjacent fin; the fins having multiple through-holes, through which a heat dissipation pipe passes and snakes around the outer wall of the mold assembly; and a base, positioned below the mold body, having multiple air outlets corresponding to the heat dissipation space.

[0003] However, the above-mentioned plastic bottle blow molding equipment still has some shortcomings. It is inconvenient to control the air flow speed during blow molding and the total amount of gas entering. If the blowing speed is too fast and the total amount of gas entering is too much, it is easy to cause the plastic bottle embryo to be blown and burst, which in turn causes the processing to be unqualified. Therefore, we propose a plastic bottle body anti-expansion blow molding device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned shortcomings and to propose a plastic bottle anti-expansion and burst blow molding device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A plastic bottle anti-expansion and burst blow molding device comprises a base and two blow molds, the top of the base is fixedly connected to a gantry, an opening and closing assembly is provided between the base and the two blow molds, a cooling assembly is provided on the blow molds, two upper cylinders are fixedly connected to the top inner wall of the gantry, the output shafts of the two upper cylinders are fixedly connected to the same mounting plate, the top of the mounting plate is fixedly connected to an air pump, the bottom of the air pump is fixedly connected to a blow molding pipe, a blow molding control assembly is provided between the blow molding pipe and the mounting plate, and a blow molding cavity is opened on one side of the blow mold.

[0007] Preferably, the blow molding control assembly includes a flow meter arranged on the blow molding tube and a lower cylinder fixedly connected to one side of the mounting plate, a slide is fixedly connected to the output shaft of the lower cylinder, a baffle is fixedly connected to one side of the slide, and the baffle is slidably sleeved in the blow molding tube.

[0008] Preferably, a cavity is defined in the mounting plate, and the slide plate is slidably sleeved in the cavity.

[0009] Preferably, a sealing sleeve is fixedly connected to one side of the blow molding tube, and the baffle sliding sleeve is arranged in the sealing sleeve.

[0010] Preferably, the top of the mounting plate is fixedly connected to two fixing frames, and the air pump is fixedly connected between the two fixing frames.

[0011] Preferably, the opening and closing assembly includes two slide grooves opened on the top of the base and a drive motor fixedly connected to one side of the base, a bidirectional screw is fixedly connected to the output shaft of the drive motor, and the outer threaded sleeve of the bidirectional screw is provided with two drive plates, and the two blow molds are respectively fixedly connected to the top of the corresponding drive plates.

[0012] Preferably, the two driving plates are slidably mounted in corresponding sliding grooves respectively.

[0013] Preferably, the cooling assembly includes a cooling cavity provided in the blow molding mold, and an inner wall of one side of the cooling cavity is provided with a cold water inlet pipe and a water outlet pipe which are fixedly connected in sequence from top to bottom.

[0014] In the utility model, a device for blow-molding a plastic bottle to prevent expansion and bursting is described. The heated bottle preform is placed in the blow-molding cavity, and the two upper cylinders are started. The two upper cylinders drive the mounting plate and the blow-molding tube to move downward and insert into the bottle preform. The air can be blown into the blow-molding tube through the air pump, and then blown into the bottle preform to perform the blow-molding operation. The flow rate of the air can be measured by the flow meter. When it is too large, the lower cylinder is started, and the lower cylinder drives the slide plate and the baffle to move horizontally, thereby adjusting the cross-sectional area of the baffle to effectively flow air into the blow-molding tube. The area can be adjusted to control the blowing flow rate, so as to avoid the preform being blown up and bursting due to excessive blowing speed. The total amount of air entering can also be measured by setting the flow meter. When the blow molding requirements are met, the lower cylinder is started to drive the slide and the baffle to move left to block the blow molding tube. At the same time, the air pump is turned off and the blow molding is stopped. The total amount of gas blown in can be controlled to avoid the preform being blown up and bursting due to excessive gas entering, thereby improving the qualified rate of plastic bottle manufacturing.

[0015] In the utility model, the device for blow-molding a plastic bottle to prevent expansion and bursting is described. After blow molding is completed, cold water is continuously injected through the cold water inlet pipe. The cold water flows in the cooling chamber to cool the blow-molded plastic bottle. The cold water absorbs heat and is then discharged from the water outlet pipe. After cooling, the drive motor is started, which drives the rotation of the bidirectional screw rod. The bidirectional screw rod drives the two drive plates and the two blow molds to move away from each other and open, so that the cooled plastic bottle can be taken out. After the bottle is taken out, the drive motor is started in the reverse direction, so that the two blow molds are close to each other and fit together, so that the next preform can be blow-molded.

[0016] The utility model has a reasonable structural design and can regulate the blowing speed and the total amount of gas entering, so as to avoid the situation that the plastic bottle embryo is blown and burst due to the blowing speed being too fast and the total amount of gas entering being too much, thereby improving the qualified rate of plastic bottle manufacturing, and being conducive to the rapid cooling and demoulding of the plastic bottle body after the blow molding is completed, thereby improving the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a plastic bottle anti-expansion and burst blow molding device proposed by the utility model;

[0018] Figure 2 This is a three-dimensional diagram of the base of a plastic bottle anti-expansion and burst blow molding device proposed by the utility model;

[0019] Figure 3 This is a cross-sectional view of a plastic bottle anti-expansion and burst blow molding device proposed by the utility model;

[0020] Figure 4 This is a structural schematic diagram of part A of a plastic bottle anti-expansion and burst blow molding device proposed by the utility model.

[0021] In the figure: 1. Base; 2. Slide; 3. Blow mold; 4. Blow cavity; 5. Water outlet pipe; 6. Cold water inlet pipe; 7. Gantry; 8. Upper cylinder; 9. Mounting plate; 10. Fixing frame; 11. Air pump; 12. Blow tube; 13. Flow meter; 14. Lower cylinder; 15. Drive motor; 16. Bidirectional screw; 17. Drive plate; 18. Cooling cavity; 19. Baffle; 20. Sealing sleeve; 21. Slide plate; 22. Cavity. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-4A plastic bottle anti-expansion and burst blow molding device comprises a base 1 and two blow molds 3. The top of the base 1 is fixedly connected to a gantry 7. An opening and closing component is provided between the base 1 and the two blow molds 3. A cooling component is provided on the blow mold 3. Two upper cylinders 8 are fixedly connected to the top inner wall of the gantry 7. The output shafts of the two upper cylinders 8 are fixedly connected to the same mounting plate 9. The top of the mounting plate 9 is fixedly connected to an air pump 11. The bottom of the air pump 11 is fixedly connected to a blow molding pipe 12. A blow molding control component is provided between the blow molding pipe 12 and the mounting plate 9. A blow molding cavity 4 is opened on one side of the blow mold 3.

[0024] In the utility model, the blow molding control assembly includes a flow meter 13 provided on the blow molding tube 12 and a lower cylinder 14 fixedly connected to one side of the mounting plate 9. A slide plate 21 is fixedly connected to the output shaft of the lower cylinder 14. A baffle 19 is fixedly connected to one side of the slide plate 21. The baffle 19 is slidably sleeved in the blow molding tube 12. The flow rate of the air flow can be measured by the flow meter 13. When the flow rate is too large, the lower cylinder 14 is started, and the lower cylinder 14 drives the slide plate 21 and the baffle 19 to move horizontally, thereby adjusting the baffle 19 to have an effect on the blow molding tube 12. The cross-sectional area of the air flowing in effectively can be used to regulate the flow rate, thereby avoiding the situation that the preform is blown and burst due to excessive blowing speed. The total amount of air entering can also be measured by the setting of the flow meter 13. When the blow molding requirement is met, the lower cylinder 14 is started, so that the lower cylinder 14 drives the slide plate 21 and the baffle 19 to move left to block the blow molding tube 12. At the same time, the air pump 11 is turned off and the blow molding is stopped. Thus, the total amount of gas blown in can be controlled to avoid the situation that the preform is blown and burst due to excessive gas.

[0025] In the present invention, a cavity 22 is provided in the mounting plate 9 , and the slide plate 21 is slidably sleeved in the cavity 22 , which is beneficial for guiding the slide plate 21 and the baffle 19 and making their movement more stable.

[0026] In the present invention, a sealing sleeve 20 is fixedly connected to one side of the blow molding tube 12, and the baffle 19 is slidably sleeved in the sealing sleeve 20, which facilitates sealing the connection between the baffle 19 and the blow molding tube 12 to avoid air leakage.

[0027] In the present invention, two fixing frames 10 are fixedly connected to the top of the mounting plate 9 , and the air pump 11 is fixedly connected between the two fixing frames 10 , so as to support and fix the air pump 11 .

[0028] In the present utility model, the opening and closing assembly includes two slide grooves 2 provided on the top of the base 1 and a drive motor 15 fixedly connected to one side of the base 1. A bidirectional screw rod 16 is fixedly connected to the output shaft of the drive motor 15. The outer threaded sleeve of the bidirectional screw rod 16 is provided with two drive plates 17. The two blow molds 3 are respectively fixedly connected to the top of the corresponding drive plates 17. When the drive motor 15 is started, the drive motor 15 drives the rotation of the bidirectional screw rod 16. The bidirectional screw rod 16 drives the two drive plates 17 and the two blow molds 3 to move away from each other and open, so as to take out the cooled plastic bottle body. After taking out, the drive motor 15 is started in the reverse direction, so that the two blow molds 3 are close to each other and fit together, so as to perform the blow molding operation on the next bottle embryo.

[0029] In the present invention, the two driving plates 17 are respectively slidably sleeved in the corresponding sliding grooves 2, which facilitates the guidance of the driving plates 17 and makes their movement more stable.

[0030] In the utility model, the cooling assembly includes a cooling chamber 18 opened in the blow mold 3. On one side of the inner wall of the cooling chamber 18, there are opened a cold water inlet pipe 6 and a water outlet pipe 5 fixedly connected from top to bottom. Cold water is continuously injected through the cold water inlet pipe 6. The cold water flows in the cooling chamber 18 and can cool the plastic bottle body after blow molding. The cold water absorbs heat and is then discharged from the water outlet pipe 5.

[0031] In the present invention, when in use, the heated preform is placed in the blow molding cavity 4, and the two upper cylinders 8 are started. The two upper cylinders 8 drive the mounting plate 9 and the blow molding tube 12 to move downward and insert into the preform. The gas can be blown into the blow molding tube 12 through the air pump 11, and then blown into the preform to perform blow molding. The flow rate of the air flow can be measured by the flow meter 13. When it is too large, the lower cylinder 14 is started. The lower cylinder 14 drives the slide plate 21 and the baffle 19 to move horizontally, and then the baffle 19 can be adjusted to adjust the cross-sectional area of the air effectively flowing into the blow molding tube 12, thereby regulating the flow rate to avoid the situation where the preform is blown and burst due to excessive blowing speed. The total amount of air entering can also be measured by the setting of the flow meter 13. When the blow molding requirements are met, the lower cylinder 14 is started, so that the lower cylinder 14 drives the slide plate 21 and the baffle 19 to move horizontally. The left movement blocks the blowing tube 12, and at the same time turns off the air pump 11 to stop blowing, so that the total amount of gas blown in can be controlled to avoid the situation where the bottle embryo bursts due to excessive total amount of gas entering, thereby improving the qualified rate of plastic bottle manufacturing. After the blow molding is completed, cold water is continuously injected through the cold water inlet pipe 6. The cold water flows in the cooling chamber 18 to cool the blow-molded plastic bottle body, and the cold water absorbs heat and is discharged from the water outlet pipe 5. When cooling is good, the drive motor 15 is started, and the drive motor 15 drives the rotation of the bidirectional screw rod 16. The bidirectional screw rod 16 drives the two drive plates 17 and the two blow molds 3 to move away from each other to open so as to take out the cooled plastic bottle body. After taking it out, the drive motor 15 is started in the reverse direction so that the two blow molds 3 are close to each other and fit together so as to blow the next bottle embryo.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic bottle anti-expansion and burst blow molding device, characterized in that: The invention comprises a base (1) and two blow molding molds (3), wherein the top of the base (1) is fixedly connected to a gantry (7), an opening and closing assembly is provided between the base (1) and the two blow molding molds (3), a cooling assembly is provided on the blow molding molds (3), two upper cylinders (8) are fixedly connected to the top inner wall of the gantry (7), the output shafts of the two upper cylinders (8) are fixedly connected to the same mounting plate (9), the top of the mounting plate (9) is fixedly connected to an air pump (11), the bottom of the air pump (11) is fixedly connected to a blow molding pipe (12), a blow molding regulating assembly is provided between the blow molding pipe (12) and the mounting plate (9), and a blow molding cavity (4) is provided on one side of the blow molding mold (3).

2. A plastic bottle anti-burst blow molding device according to claim 1, characterized in that: The blow molding regulating assembly comprises a flow meter (13) arranged on the blow molding tube (12) and a lower cylinder (14) fixedly connected to one side of the mounting plate (9); a slide plate (21) is fixedly connected to the output shaft of the lower cylinder (14); a baffle (19) is fixedly connected to one side of the slide plate (21); and the baffle (19) is slidably sleeved in the blow molding tube (12).

3. A plastic bottle anti-burst blow molding device according to claim 2, characterized in that: A cavity (22) is provided in the mounting plate (9), and the slide plate (21) is slidably sleeved in the cavity (22).

4. A plastic bottle anti-burst blow molding device according to claim 2, characterized in that: A sealing sleeve (20) is fixedly connected to one side of the blow molding tube (12), and the baffle (19) is slidably sleeved in the sealing sleeve (20).

5. The device for preventing plastic bottle from bursting and blowing according to claim 1, characterized in that: Two fixing frames (10) are fixedly connected to the top of the mounting plate (9), and the air pump (11) is fixedly connected between the two fixing frames (10).

6. The device for preventing plastic bottle from bursting and blowing according to claim 1, characterized in that: The opening and closing assembly comprises two slide grooves (2) provided on the top of the base (1) and a drive motor (15) fixedly connected to one side of the base (1); a bidirectional screw rod (16) is fixedly connected to the output shaft of the drive motor (15); two drive plates (17) are provided on the outer thread sleeves of the bidirectional screw rod (16); and two blow molds (3) are respectively fixedly connected to the tops of the corresponding drive plates (17).

7. A plastic bottle anti-burst blow molding device according to claim 6, characterized in that: The two drive plates (17) are respectively slidably sleeved in the corresponding sliding grooves (2).

8. The device for preventing plastic bottle from bursting and blowing according to claim 1, characterized in that: The cooling assembly comprises a cooling cavity (18) provided in the blow mould (3), and an inner wall of one side of the cooling cavity (18) is provided with a cold water inlet pipe (6) and a water outlet pipe (5) which are fixedly connected in sequence from top to bottom.

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