A vacuum supply device suitable for a blow-fill-seal integrated machine

Abstract

The utility model relates to the technical field of blow -fill -seal integrated machine and disclose a kind of vacuum supply device suitable for blow -fill -seal integrated machine, comprising: mould, fixedly arranged connecting block, for being contacted with mould's sealing washer, cylinder and hollow vacuum shaft, the connecting block is equipped with through-hole;The one end of the vacuum shaft is connected on the piston rod of cylinder, and the other end passes through the through-hole on the connecting block and is connected with first mounting plate;The side of the first mounting plate is clamped with sealing washer by clamping groove;Spring is sleeved on the vacuum shaft. By setting pre-tightening spring to sealing washer pre-tightening force, so that spring has certain stroke margin, can be compensated by expansion when sealing washer wear thickness reduces, so as to maintain the sealing performance of sealing washer, avoid the gap caused by leakage;And, vacuum supply device overall structure saves time and labor, simple structure, maintenance is convenient, so the quality of the production product of blow -fill -seal equipment can be greatly improved, and economic benefit is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of blow-fill-seal integrated machines, specifically a vacuum replenishment device suitable for blow-fill-seal integrated machines. Background Technology

[0002] The rotary blow-fill-cap machine is a highly integrated automated production equipment that combines the functions of a blow molding machine, a filling machine, and a capping machine. By rotating a mold, it realizes a continuous production process from plastic granules to finished beverage bottles. The entire process requires no manual intervention, which greatly improves production efficiency and product quality.

[0003] During normal production, conventional vacuum replenishment devices use cylinders to directly attach the sealing gasket to the inlet surface of the mold's vacuum channel. Since the external force and stroke applied by the cylinder are fixed values, gaps gradually form between the sealing gasket and the mold's contact surface as the gasket wears down, thus disrupting the vacuum and ultimately affecting the molding effect of the tube preform in the mold. To address this issue, we propose a vacuum replenishment device suitable for blow-fill-seal integrated machines. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a vacuum replenishment device suitable for blow-fill-seal integrated machines, solving the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a vacuum replenishment device suitable for a blow-fill-seal integrated machine, comprising: a mold, a fixedly mounted connecting block, a sealing gasket for contacting the mold, a cylinder, and a hollow vacuum shaft. The connecting block has a through hole; one end of the vacuum shaft is connected to the piston rod of the cylinder, and the other end passes through the through hole on the connecting block and is connected to a first mounting plate; the side of the first mounting plate is engaged with the sealing gasket through a slot; a spring is sleeved on the vacuum shaft, the spring is located between the first mounting plate and the connecting block, and both ends of the spring abut against the first mounting plate and the connecting block respectively; a vacuum groove communicating with the vacuum shaft is provided on the sealing gasket, and the end of the vacuum shaft away from the sealing gasket is used to communicate with a vacuum air source.

[0006] Preferably, a mounting base is fixedly installed on the side of the connecting block, and a limit hole is provided on the mounting base. An anti-rotation shaft is movably provided in the limit hole, and the anti-rotation shaft is connected to the first mounting plate by bolts.

[0007] Preferably, the vacuum replenishment device further includes a second mounting plate and a third mounting plate, the second mounting plate being connected to the end of the connecting block opposite to the first mounting plate; the third mounting plate being spaced apart from the second mounting plate, and the third mounting plate being fixedly connected to the second mounting plate by a support rod; the cylinder being mounted on the third mounting plate, and a limit switch for controlling the cylinder being fixedly mounted on one side of the third mounting plate.

[0008] Preferably, a trigger block is fixedly mounted on the outer surface of the vacuum shaft; the trigger block has a first state and a second state; in the first state, the trigger block is in contact with the touch switch of the limit switch; in the second state, the trigger block is separated from the touch switch of the limit switch.

[0009] Preferably, the trigger block has an opening that communicates with the internal cavity of the vacuum shaft to form a channel, which is used to communicate with the vacuum air source.

[0010] Preferably, the mold is provided with an inlet and a die head, and the mold extrudes the tube blank through the die head.

[0011] Preferably, when the sealing gasket abuts against the mold, the vacuum groove on the sealing gasket communicates with the inlet of the mold.

[0012] Preferably, the upper end of the sealing gasket is chamfered, and the chamfer is located on the side of the sealing gasket away from the first mounting plate.

[0013] Preferably, the spring and the vacuum shaft are fitted with a clearance.

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

[0015] This vacuum replenishment device, applicable to blow-fill-seal integrated machines, applies pre-tightening force to the sealing gasket using a pre-tensioned spring. This spring has a certain travel margin, which can compensate for the reduced thickness of the sealing gasket through expansion and contraction, thereby maintaining the sealing performance of the gasket and preventing gaps that could lead to leakage. Furthermore, the overall structure of the vacuum replenishment device is time-saving, labor-saving, simple, and easy to maintain, thus greatly improving the quality of products produced by blow-fill-seal equipment and increasing economic efficiency. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is an isometric view of the structure of this utility model.

[0019] In the diagram: 1. Sealing gasket; 2. First mounting plate; 3. Anti-rotation shaft; 4. Mounting base; 5. Connecting block; 6. Vacuum shaft; 61. Trigger block; 62. Channel; 7. Second mounting plate; 8. Mold; 81. Inlet; 9. Limit switch; 10. Cylinder; 11. Third mounting plate; 12. Support rod; 13. Spring; 14. Die head; 15. Tube blank. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-3 A vacuum replenishment device suitable for a blow-fill-seal integrated machine includes: a mold 8, a fixedly mounted connecting block 5, a sealing gasket 1 for contacting the mold 8, a cylinder 10, and a hollow vacuum shaft 6. The connecting block 5 has a through hole; one end of the vacuum shaft 6 is connected to the piston rod of the cylinder 10, and the other end passes through the through hole on the connecting block 5 and is connected to a first mounting plate 2; the side of the first mounting plate 2 is engaged with the sealing gasket 1 through a slot; a spring 13 is sleeved on the vacuum shaft 6, with a clearance fit between the spring 13 and the vacuum shaft 6, and the spring 13 is located at the first... Mounting plate 2 and connecting block 5, mounting base 4 is fixedly mounted on the side of connecting block 5, mounting base 4 has a limit hole, anti-rotation shaft 3 is movably set in the limit hole, anti-rotation shaft 3 is connected to first mounting plate 2 by bolts, and the two ends of spring 13 abut against first mounting plate 2 and connecting block 5 respectively; sealing gasket 1 has a vacuum groove communicating with vacuum shaft 6, the end of vacuum shaft 6 away from sealing gasket 1 is used to communicate with vacuum air source, the upper end of sealing gasket 1 has a chamfer, and the chamfer is located on the side of sealing gasket 1 away from first mounting plate 2.

[0022] The vacuum replenishment device also includes a second mounting plate 7 and a third mounting plate 11. The second mounting plate 7 is connected to the end of the connecting block 5 that is away from the first mounting plate 2. The third mounting plate 11 is spaced apart from the second mounting plate 7, and the third mounting plate 11 and the second mounting plate 7 are fixedly connected by a support rod 12.

[0023] The cylinder 10 is mounted on the third mounting plate 11. A limit switch 9 for controlling the cylinder 10 is fixedly mounted on one side of the third mounting plate 11. A trigger block 61 is fixedly mounted on the outer surface of the vacuum shaft 6. The trigger block 61 has a first state and a second state. In the first state, the trigger block 61 is in contact with the touch switch of the limit switch 9. In the second state, the trigger block 61 is separated from the touch switch of the limit switch 9. An opening communicating with the internal cavity of the vacuum shaft 6 is provided on the trigger block 61 to form a channel 62. The channel 62 is used to communicate with the vacuum air source. The mold 8 is provided with an inlet 81 and a die head 14 respectively. The mold 8 extrudes the tube blank 15 through the die head 14. When the sealing gasket 1 abuts against the mold 8, the vacuum groove on the sealing gasket 1 communicates with the inlet 81 of the mold 8.

[0024] Specifically, the hollow second mounting plate 7 is fixed on the frame of the blow-fill-seal integrated machine (not shown in the figure). The hollow connecting block 5 is installed on the second mounting plate 7. The large thread end of the vacuum shaft 6 is passed through the second mounting plate 7 and the connecting block 5 in sequence until the large thread end of the vacuum shaft 6 protrudes from the connecting block 5. Then, the large thread end of the vacuum shaft 6 passes through the inner hole of the spring 13. A spring 13 is provided between the first mounting plate 2 and the connecting block 5. The two ends of the spring 13 are in close contact with the first mounting plate 2 and the connecting block 5, respectively. The outer surface of the vacuum shaft 6... A trigger block 61 is fixedly mounted on the surface. The trigger block 61 can contact the touch switch of the limit switch 9. The vacuum shaft 6 has a cavity design inside, and the trigger block 61 has an opening that communicates with the cavity inside the vacuum shaft 6 to form a channel 62. The channel 62 can communicate with the vacuum air source. The sealing gasket 1 has a vacuum groove that communicates with the channel 62. The axis of the spring 13 coincides with the axis of the vacuum shaft 6, and there is a gap between the spring 13 and the vacuum shaft 6. When the large thread end of the vacuum shaft 6 is tightened with the first mounting plate 2, until... After one end of spring 13 is pressed against connecting block 5, the large thread end of vacuum shaft 6 is screwed into the large thread hole of first mounting plate 2 until the end face of the large thread end of vacuum shaft 6 is pressed against the mounting surface of first mounting plate 2; the hollow mounting base 4 is fixed above connecting block 5, and the threaded side of anti-rotation shaft 3 is passed through mounting base 4 and pressed against first mounting plate 2, and then bolts are used to fix anti-rotation shaft 3 and first mounting plate 2 together; the chamfered side of sealing gasket 1 is set upward and the non-chamfered side is set downward, and the grooves on both sides of sealing gasket 1 are engaged with the grooves on both sides of first mounting plate 2. Inside the slot, push the sealing gasket 1 until the chamfered end face of the sealing gasket 1 is flush with the surface of the first mounting plate 2. The sealing gasket 1 has two vacuum grooves. One end of the support rod 12 is fixed to the second mounting plate 7, and the other end is connected to the third mounting plate 11. The limit switch 9 and the cylinder 10 are mounted on the third mounting plate 11. The small threaded end of the vacuum shaft 6 is screwed into the internal threaded hole of the output shaft of the cylinder 10. The left and right movement of the input shaft of the cylinder 10 can drive the first mounting plate 2 to compress or release the spring 13, so that the sealing gasket 1 moves left and right. Figure 1As shown; the die head 14 is also fixed on the frame of the blow-fill-seal machine (not shown in the figure) and is located directly above the die 8. The die 8 has an inlet 81, from which the tube blank 15 is extruded from the lower end face of the die head 14; the vacuum shaft 6 includes a trigger block 61 at the front end and a channel 62, and the trigger block 61 moves with the left and right movement of the cylinder 10 shaft.

[0025] When the rotary blow-fill-seal machine is in normal production, the inner cavity of cylinder 10 is connected to the outside atmosphere and is in a pressureless state. The piston inside cylinder 10 moves to the left under the action of the spring 13, which in turn moves the sealing gasket 1, the first mounting plate 2, the vacuum shaft 6, and the trigger block 61 to the left. This causes the sealing gasket 1 to press against the mold 8, and the vacuum groove on the sealing gasket 1 to align with the inlet 81 on the mold 8. The vacuum groove on the sealing gasket 1 is connected to the trigger block 61 and the vacuum source through the channel 62. At this time, the trigger block 61 disengages from the limit switch 9, and the limit switch 9 sends a signal to the blow-fill-seal machine. Under the condition that other conditions are met, the blow-fill-seal machine can start production normally. With prolonged production, the thickness of the sealing gasket 1 decreases due to the long-term friction between the mold 8 and the sealing gasket 1. At the same time, under the force of the spring 13, the sealing gasket 1 will always press against the surface of the mold 8, achieving a reliable seal between the sealing gasket 1 and the mold 8. When the rotary blow-fill-seal machine is not in production or when the mold 8 is being disassembled and repaired, compressed air is introduced into the inner cavity of the cylinder 10. Under the pressure, the output shaft of the cylinder 10 moves to the right, which in turn moves the sealing gasket 1, the first mounting plate 2, the vacuum shaft 6, and the trigger block 61 to the right. The sealing gasket 1 is disengaged from the mold 8. At the same time, the trigger block 61 contacts the limit switch 9, which sends another signal to the blow-fill-seal machine, allowing the machine to perform normal operations such as mold 8 disassembly.

[0026] 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 vacuum replenishment device suitable for a blow-fill-seal integrated machine, characterized in that, include: The assembly includes a mold (8), a fixed connecting block (5), a sealing gasket (1) for contact with the mold (8), a cylinder (10), and a hollow vacuum shaft (6). The connecting block (5) has a through hole. One end of the vacuum shaft (6) is connected to the piston rod of the cylinder (10), and the other end passes through the through hole on the connecting block (5) and is connected to the first mounting plate (2). The side of the first mounting plate (2) is engaged with the sealing gasket (1) through a slot. A spring (13) is sleeved on the vacuum shaft (6). The spring (13) is located between the first mounting plate (2) and the connecting block (5), and both ends of the spring (13) abut against the first mounting plate (2) and the connecting block (5), respectively. A vacuum groove communicating with the vacuum shaft (6) is provided on the sealing gasket (1), and the end of the vacuum shaft (6) away from the sealing gasket (1) is used to communicate with a vacuum source.

2. The vacuum replenishment device according to claim 1, characterized in that, The side of the connecting block (5) is fixedly mounted with a mounting base (4), and a limit hole is provided on the mounting base (4). An anti-rotation shaft (3) is movably provided in the limit hole, and the anti-rotation shaft (3) is connected to the first mounting plate (2) by bolts.

3. The vacuum replenishment device according to claim 1, characterized in that, The vacuum replenishment device further includes a second mounting plate (7) and a third mounting plate (11). The second mounting plate (7) is connected to the end of the connecting block (5) away from the first mounting plate (2). The third mounting plate (11) is spaced apart from the second mounting plate (7), and the third mounting plate (11) and the second mounting plate (7) are fixedly connected by a support rod (12). The cylinder (10) is mounted on the third mounting plate (11), and a limit switch (9) for controlling the cylinder (10) is fixedly mounted on one side of the third mounting plate (11).

4. The vacuum replenishment device according to claim 3, characterized in that, A trigger block (61) is fixedly mounted on the outer surface of the vacuum shaft (6); the trigger block (61) has a first state and a second state; in the first state, the trigger block (61) is in contact with the touch switch of the limit switch (9); in the second state, the trigger block (61) is separated from the touch switch of the limit switch (9).

5. The vacuum replenishment device according to claim 4, characterized in that, The trigger block (61) has an opening that communicates with the internal cavity of the vacuum shaft (6) to form a channel (62), which is used to communicate with the vacuum air source.

6. The vacuum replenishment device according to claim 1, characterized in that, The mold (8) is provided with an inlet (81) and a die head (14), and the mold (8) extrudes the tube blank (15) through the die head (14).

7. The vacuum replenishment device according to claim 6, characterized in that, When the sealing gasket (1) abuts against the mold (8), the vacuum groove on the sealing gasket (1) communicates with the inlet (81) of the mold (8).

8. The vacuum replenishment device according to claim 1, characterized in that, The upper end of the sealing gasket (1) is chamfered, and the chamfer is located on the side of the sealing gasket (1) away from the first mounting plate (2).

9. The vacuum replenishment device according to claim 1, characterized in that, The spring (13) and the vacuum shaft (6) are fitted with a clearance.

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