Wall thickness adjusting device and blowing, filling and sealing all-in-one machine

Abstract

The utility model relates to the technical field of plastic hollow forming, and discloses a wall thickness adjusting device which comprises a mold base, a mold sleeve and a mold core rod, a plastic feeding pipe is installed on the surface of the mold base, the mold sleeve is installed at the bottom end of the mold base, the mold base and the mold sleeve are connected to the surface of the mold core rod in a sleeved mode, a first buffering cavity is formed between the mold core rod and the mold base, and a second buffering cavity is formed between the mold core rod and the mold base. A second buffer cavity and an adjusting die orifice are formed between the die core rod and the die sleeve, the second buffer cavity is communicated with the adjusting die orifice, and a position adjusting assembly is arranged at the top of the die holder. According to the wall thickness adjusting device, by arranging the mold core rod and the position adjusting assembly, adjusting the position of the mold core rod through the position adjusting assembly and setting corresponding parameters in a wall thickness adjusting program, the opening degree of the opening mold of the adjusting mold opening can be adjusted, corresponding material blanks with different thicknesses are obtained, the wall thicknesses of the material blanks can be continuously adjusted on line, and the quality of a formed container can be controlled; the difficulty of operators is reduced and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic hollow molding technology, specifically a wall thickness adjustment device and an integrated blow-fill-seal machine. Background Technology

[0002] In the field of plastic hollow molding, preform wall thickness control technology is a key technology, especially in the application of blow-fill-seal integrated equipment. Preform wall thickness is usually linked to production costs and subsequent finished product inspection stages. Thicker container walls result in lower light transmittance, which is not conducive to screening, while thinner container walls increase the risk of leakage after sterilization.

[0003] Most existing extruder die head structures use manual adjustment of the die gap to control the wall thickness. For some containers that are not sensitive to wall thickness requirements, they can still be used after adjusting the die gap. However, for some containers that require different wall thicknesses for the bottle head, body, and bottom, the wall thickness needs to be adjusted periodically. Manual adjustment makes it difficult to guarantee the accuracy of the wall thickness after adjustment. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a wall thickness adjustment device and an integrated blow-fill-seal machine, which solves the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a wall thickness adjustment device, comprising: a mold base, a mold sleeve, and a mold core rod. A plastic feed pipe is installed on the surface of the mold base. The mold sleeve is installed at the bottom end of the mold base. The mold base and the mold sleeve are sleeved on the mold core rod. A first buffer cavity is formed between the mold core rod and the mold base. A second buffer cavity and an adjusting mold opening are formed between the mold core rod and the mold sleeve. The second buffer cavity and the adjusting mold opening are connected. A position adjustment component is provided on the top of the mold base. The movable end of the position adjustment component is connected to the top end of the mold core rod for adjusting the position of the mold core rod.

[0006] Preferably, the position adjustment assembly includes a hydraulic cylinder, a proportional directional valve, and a hydraulic press. A mounting plate is connected to the hydraulic cylinder, a guide seat is mounted on the bottom of the mounting plate, the mold base is mounted on the bottom of the guide seat, the proportional directional valve is mounted on the hydraulic cylinder, the hydraulic cylinder is connected to the hydraulic press, and a mold core fixing seat is provided at the top of the mold core rod. The mold core fixing seat is mounted on the telescopic end of the hydraulic cylinder.

[0007] Preferably, the position adjustment assembly further includes a displacement sensor mounted on a hydraulic cylinder, which is used to detect the position of the mold core rod.

[0008] Preferably, the guide seat includes a connecting plate connected to the mold base, the top of the connecting plate is provided with a plurality of guide rods, and the top of the guide rods is connected to the bottom of the mounting plate, and the mold core fixing seat is slidably connected to the guide rods.

[0009] Preferably, a cooling pipe is installed on the mounting plate, and a cooling water circuit is provided inside the mounting plate, with the cooling pipe connected to the cooling water circuit.

[0010] Preferably, the mold core rod has an air channel inside, a connecting block is installed at the top of the mold core rod, an air inlet pipe is installed on the connecting block, the air inlet pipe extends into the interior of the connecting block, and the air inlet pipe communicates with the air channel.

[0011] Preferably, a correction seat is installed at the bottom of the mold base, and the correction seat is sleeved on the mold sleeve; a first adjusting bolt is screwed onto the correction seat, and a mating groove is opened on the surface of the mold sleeve, and one end of the first adjusting bolt is inserted into the mating groove.

[0012] Preferably, the correction seat is further screwed with a second adjusting bolt. There are two second adjusting bolts, which are arranged symmetrically with respect to the center of the correction seat. A first adjusting bolt is located between the two second adjusting bolts, and one end of the second adjusting bolt abuts against the surface of the mold sleeve.

[0013] A blow-fill-seal integrated machine, comprising the wall thickness adjustment device described in any of the above-mentioned embodiments.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This wall thickness adjustment device, by setting a mold core rod and a position adjustment component, adjusts the position of the mold core rod. By setting the corresponding parameters in the wall thickness adjustment program, the opening of the mold can be adjusted to obtain blanks of different thicknesses. The wall thickness of the blank can be continuously adjusted online, controlling the quality of the molded container, reducing the difficulty for operators, and improving production efficiency.

[0016] 2. The wall thickness adjustment device, by setting a correction seat, a first adjusting bolt and a second adjusting bolt, adjusts the mold sleeve so that the mold sleeve coincides with the central axis of the mold core rod, so as to avoid the phenomenon of material blank skewing and make the material blank extruded in a straight state. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This utility model Figure 1 A schematic diagram of the top section of the structure at location AA;

[0019] Figure 3 This is a schematic diagram of the hydraulic press connection of this utility model.

[0020] In the diagram: 1. Mold base; 2. Mold sleeve; 3. Mold core rod; 4. Plastic feed pipe; 5. First buffer chamber; 6. Second buffer chamber; 7. Adjusting mold opening; 81. Hydraulic cylinder; 82. Proportional directional valve; 83. Hydraulic press; 84. Displacement sensor; 9. Mounting plate; 101. Connecting plate; 102. Guide rod; 11. Mold core fixing seat; 12. Cooling pipe; 13. Air channel; 14. Air inlet pipe; 15. Correction seat; 16. First adjusting bolt; 17. Second adjusting bolt; 18. Connecting groove; 19. Material blank; 20. Container product. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-3 A wall thickness adjustment device includes: a mold base 1, a mold sleeve 2, and a mold core rod 3. A plastic feed pipe 4 is installed on the surface of the mold base 1. The mold sleeve 2 is installed at the bottom end of the mold base 1. The mold base 1 and the mold sleeve 2 are sleeved on the mold core rod 3. A first buffer cavity 5 is formed between the mold core rod 3 and the mold base 1. A second buffer cavity 6 and an adjusting mold opening 7 are formed between the mold core rod 3 and the mold sleeve 2. The second buffer cavity 6 and the adjusting mold opening 7 are connected. A position adjustment component is provided on the top of the mold base 1. The movable end of the position adjustment component is connected to the top end of the mold core rod 3 for adjusting the position of the mold core rod 3.

[0023] Preferably, the position adjustment assembly includes a hydraulic cylinder 81, a proportional directional valve 82, and a hydraulic press 83. A mounting plate 9 is connected to the hydraulic cylinder 81, and a guide seat is installed at the bottom of the mounting plate 9. The mold base 1 is installed at the bottom of the guide seat. The proportional directional valve 82 is installed on the hydraulic cylinder 81. The hydraulic cylinder 81 is connected to the hydraulic press 83. A mold core fixing seat 11 is provided at the top of the mold core rod 3. The mold core fixing seat 11 is installed at the telescopic end of the hydraulic cylinder 81.

[0024] Preferably, the position adjustment assembly further includes a displacement sensor 84, which is mounted on the hydraulic cylinder 81 and is used to detect the position of the mold core rod 3.

[0025] Preferably, the guide seat includes a connecting plate 101 connected to the mold base 1. The top of the connecting plate 101 is provided with a plurality of guide rods 102, and the top of the guide rods 102 is connected to the bottom of the mounting plate 9. The mold core fixing seat 11 is slidably connected to the guide rods 102.

[0026] Preferably, a cooling pipe 12 is installed on the mounting plate 9, and a cooling water circuit is provided inside the mounting plate 9, with the cooling pipe 12 connected to the cooling water circuit.

[0027] Preferably, the mold core rod 3 has an air channel 13 inside, a connecting block is installed at the top of the mold core rod 3, an air inlet pipe 14 is installed on the connecting block, the air inlet pipe 14 extends into the interior of the connecting block, and the air inlet pipe 14 is connected to the air channel 13.

[0028] Preferably, a correction seat 15 is installed at the bottom of the mold base 1, and the correction seat 15 is sleeved on the mold sleeve 2; a first adjusting bolt 16 is screwed onto the correction seat 15, and a mating groove 18 is opened on the surface of the mold sleeve 2, and one end of the first adjusting bolt 16 is inserted into the mating groove 18.

[0029] Preferably, the correction seat 15 is also equipped with a second adjusting bolt 17. There are two second adjusting bolts 17, which are arranged symmetrically with respect to the center of the correction seat 15. The first adjusting bolt 16 is located between the two second adjusting bolts 17, and one end of the second adjusting bolt 17 abuts against the surface of the mold sleeve 2.

[0030] A blow-fill-seal integrated machine includes a wall thickness adjustment device.

[0031] Plastic particles are heated and extruded by the extruder barrel and enter through the plastic feed pipe, reaching the first buffer chamber 5. A circular cylindrical preform is formed around the die core rod 3. The preform then enters the smaller second buffer chamber 6, further reducing the preform wall thickness. At the same time, sterile filtered compressed air is continuously injected through the air inlet pipe 14 at the upper end of the die core rod 3 to maintain the extruded hollow circular preform and prevent adhesion. The gap between the die core rod 3 and the die sleeve 2 is the adjusting die opening 7. The actual preform wall thickness control is achieved by adjusting the opening size of the adjusting die opening 7. The die core rod 3 and the die sleeve 2 form a "V" shaped gap, which can easily achieve precise control of the wall thickness. The overall structure is small in volume, and the spacing between multiple die cores is very small, saving space. The die core rod 3 and the surrounding die sleeve 2 form the first buffer chamber 5 and the second buffer chamber 6, making the flow rate of the extruded preform 19 stable and easy to control.

[0032] To facilitate control of the mold core rods 3, all mold core rods 3 are installed on the mold core fixing plate. The mold core fixing plate is guided and limited by guide rods to ensure stable up-and-down movement of the mold core rods 3. A closed-loop control system is formed by hydraulic cylinder 81, proportional directional valve 82, displacement sensor 84, hydraulic press 83, and wall thickness control program to precisely adjust the position of the mold core rods 3. According to the characteristics of the container shape, the thickness parameters of the blank in different areas are set to obtain a blank corresponding to the length of the container. After entering the mold for forming, the final container product is obtained. The proportional directional valve 82 and displacement sensor 84 installed on the hydraulic cylinder 81 are installed close to the actuator, which greatly improves the response speed of the cylinder. The hydraulic cylinder 81 is connected to the mold core fixing seat 11, and the mold core rods 3 are installed on the mold core fixing seat 11. The mold gap can be adjusted at the same time. The mold core fixing seat 11 is slidably connected to the guide rod 102 and can move smoothly up and down.

[0033] When the equipment is running, the die sleeve 2 is stationary. There is a misalignment between the die sleeve 2 and the die core rod 3, which causes the extruded blank to be thicker on one side and thinner on the other, resulting in a skewed blank. Therefore, the initial adjustment can be made by the correction structure composed of the first adjusting bolt 16 and the second adjusting bolt 17 to make the blank extruded in a straight state.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wall thickness adjustment device, characterized in that, include: The mold base (1), mold sleeve (2), and mold core rod (3) are provided. A plastic feed pipe (4) is installed on the surface of the mold base (1). The mold sleeve (2) is installed at the bottom end of the mold base (1). The mold base (1) and the mold sleeve (2) are sleeved on the mold core rod (3). A first buffer cavity (5) is formed between the mold core rod (3) and the mold base (1). A second buffer cavity (6) and an adjusting mold opening (7) are formed between the mold core rod (3) and the mold sleeve (2). The second buffer cavity (6) and the adjusting mold opening (7) are connected. A position adjustment component is provided on the top of the mold base (1). The movable end of the position adjustment component is connected to the top end of the mold core rod (3) for adjusting the position of the mold core rod (3).

2. The wall thickness adjustment device according to claim 1, characterized in that, The position adjustment assembly includes a hydraulic cylinder (81), a proportional directional valve (82), and a hydraulic press (83). A mounting plate (9) is connected to the hydraulic cylinder (81), and a guide seat is installed at the bottom of the mounting plate (9). The mold base (1) is installed at the bottom of the guide seat. The proportional directional valve (82) is installed on the hydraulic cylinder (81). The hydraulic cylinder (81) is connected to the hydraulic press (83). A mold core fixing seat (11) is provided at the top of the mold core rod (3). The mold core fixing seat (11) is installed at the telescopic end of the hydraulic cylinder (81).

3. The wall thickness adjustment device according to claim 2, characterized in that, The position adjustment assembly also includes a displacement sensor (84), which is mounted on a hydraulic cylinder (81) and is used to detect the position of the core rod (3).

4. The wall thickness adjustment device according to claim 2, characterized in that, The guide seat includes a connecting plate (101) connected to the mold base (1). The top of the connecting plate (101) is provided with a plurality of guide rods (102), and the top of the guide rods (102) is connected to the bottom of the mounting plate (9). The mold core fixing seat (11) is slidably connected to the guide rods (102).

5. The wall thickness adjustment device according to claim 2, characterized in that, A cooling pipe (12) is installed on the mounting plate (9), and a cooling water circuit is provided inside the mounting plate (9). The cooling pipe (12) is connected to the cooling water circuit.

6. The wall thickness adjustment device according to claim 1, characterized in that, An air channel (13) is provided inside the mold core rod (3). A connecting block is installed at the top of the mold core rod (3). An air inlet pipe (14) is installed on the connecting block. The air inlet pipe (14) extends into the interior of the connecting block and is connected to the air channel (13).

7. The wall thickness adjustment device according to claim 1, characterized in that, A correction seat (15) is installed at the bottom of the mold base (1), and the correction seat (15) is sleeved on the mold sleeve (2); a first adjusting bolt (16) is screwed on the correction seat (15), and a mating groove (18) is opened on the surface of the mold sleeve (2), and one end of the first adjusting bolt (16) is inserted into the mating groove (18).

8. The wall thickness adjustment device according to claim 7, characterized in that, The correction seat (15) is also screwed with a second adjusting bolt (17). There are two second adjusting bolts (17). The two second adjusting bolts (17) are arranged symmetrically with the center of the correction seat (15) vertically facing each other. The first adjusting bolt (16) is located between the two second adjusting bolts (17). One end of the second adjusting bolt (17) abuts against the mold sleeve (2).

9. A blow-fill-seal integrated machine, characterized in that, Includes the wall thickness adjustment device as described in any one of claims 1 to 8.

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