PE plastic bottle blow molding device

Abstract

The utility model relates to the field of plastic bottle production especially relates to a PE plastic bottle blow molding device, and fixed mould, movable mould constitute forming mould, and movable mould is driven to move horizontally to realize the action of closing die by closing film mechanism, is equipped with material nozzle to realize feeding and is located the fixed mould top, and the fixed mould side is connected with blow molding mouth. In the utility model, the movable mould, the fixed mould closing film can excite the gas storage mechanism in the fixed mould, and the gas in the gas source mechanism is stored and energy storage by the gas storage cavity and annular diaphragm in the fixed mould, and the gas in the gas storage cavity is released quickly and enters the mould cavity through the gas passage to fill the product outer wall gap when the film is retracted, so as to play the effect of auxiliary demolding, which not only triggers accurately but also can effectively improve the demolding efficiency, avoids the burr of product and improves the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic bottle production technology, and in particular to a blow molding device for PE plastic bottles. Background Technology

[0002] Currently, blow molding machines are mostly used in the production of PE plastic bottles. A blow molding machine is a plastic processing machine that sprays liquid plastic and uses the air force of the machine to blow the plastic body into a mold cavity of a certain shape, thereby making the product.

[0003] However, in the existing technology, some traditional blow molding equipment, in order to increase production speed, performs the demolding process before the mold after blow molding has reached a good cooling time, which causes problems such as burrs on the mold surface, resulting in low demolding efficiency and affecting production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a blow molding device for PE plastic bottles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A blow molding apparatus for PE plastic bottles includes a fixed mold and a moving mold, which together form a molding die. The moving mold is driven to move laterally by a mold closing mechanism to achieve the mold closing action. A material nozzle is provided above the fixed mold to achieve material feeding. A blow molding nozzle is connected to one side of the fixed mold.

[0007] A pair of guide grooves are provided on one side of the fixed mold. One side of the guide grooves is connected to the air storage chamber. An annular diaphragm is installed in the center of the air storage chamber. An air receiving support is installed in the middle of one side of the air storage chamber. A rubber block is installed inside the air receiving support by a spring. The rubber block seals the air outlet of the air receiving support in its natural state.

[0008] A pin is installed on one side of the moving mold. The pin and the guide groove are interlocking mechanisms. One end of the pin is provided with a thin trigger rod, which corresponds to and fits into the air cavity.

[0009] Furthermore, in a preferred configuration, the outer wall of the annular diaphragm is spaced a certain distance from the inner wall of the gas storage chamber to allow for deformation of the annular diaphragm.

[0010] Furthermore, in a preferred configuration, one end of the air receiving support is connected to an air source mechanism.

[0011] In addition, a preferred structure is that a support frame is installed inside the air inlet support, a spring is installed in the middle of the support frame, and the other end of the spring is connected to a rubber block.

[0012] In addition, a preferred structure is that the air-receiving support has an internal ventilation groove, the inner diameter of which is larger than the outer diameter of the rubber block.

[0013] In addition, a preferred structure is that one end of the insertion post is provided with a sealing gasket, and when the insertion post is inserted into the guide groove, the sealing gasket is sealed and squeezed against the inner wall of the guide groove.

[0014] In addition, a preferred structure is that a mold cavity is formed in the middle of the fixed mold and the moving mold, and a pair of air passages are formed on the inner wall of the mold cavity of the fixed mold, and the air passages are connected to the guide groove.

[0015] The beneficial effects of this utility model are as follows:

[0016] In this invention, when the moving mold and the fixed mold are closed, the gas storage mechanism in the fixed mold is activated. The gas in the gas source mechanism is stored and stored using the gas storage cavity and annular diaphragm inside the fixed mold. As the mold is removed, the gas in the gas storage cavity is quickly released and enters the mold cavity through the air channel to fill the gaps on the outer wall of the product, thereby assisting in demolding. It not only triggers accurately but also effectively improves demolding efficiency, avoids burrs on the product, and improves production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a PE plastic bottle blow molding device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the fixed mold proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure at point A proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the air-receiving support structure proposed in this utility model;

[0021] Figure 5 This is a cross-sectional view of the fixed mold and moving mold combined according to the present invention.

[0022] In the diagram: 1. Fixed mold; 11. Guide groove; 12. Air storage cavity; 13. Air passage; 2. Moving mold; 21. Insert pin; 22. Trigger rod; 23. Sealing gasket; 3. Mold closing mechanism; 4. Air source mechanism; 5. Blow molding nozzle; 6. Material nozzle; 7. Mold cavity; 8. Rubber membrane; 9. Support; 91. Rubber block; 92. Spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-5 A PE plastic bottle blow molding device includes a fixed mold 1 and a moving mold 2. The fixed mold 1 and the moving mold 2 form a molding die. The moving mold 2 is driven by a film closing mechanism 3 to move laterally to achieve the mold closing action. A material nozzle 6 is provided above the fixed mold 1 to achieve material feeding. A blow molding nozzle 5 is connected to one side of the fixed mold 1 and the blow molding nozzle 5 is connected to the mold cavity 7 of the fixed mold 1.

[0025] A pair of guide grooves 11 are provided on one side of the fixed mold 1. One side of the guide grooves 11 is connected to the air storage cavity 12. An annular diaphragm 8 is installed in the center of the air storage cavity 12. An air receiving support 9 is installed in the middle of one side of the air storage cavity 12. A rubber block 9 is installed inside the air receiving support 9 through a spring 92. Under the tightening force of the spring 92, the rubber block 9 naturally seals the air outlet of the air receiving support 9.

[0026] A pin 21 is installed on one side of the moving mold 2. When the mold is closed, the pin 21 is inserted into the guide groove 11. One end of the pin 21 is provided with a thin trigger rod 22, which is matched with the air cavity 12.

[0027] The outer wall of the annular diaphragm 8 is kept at a certain distance from the inner wall of the gas storage chamber 12 to allow for the deformation of the annular diaphragm 8.

[0028] One end of the air receiving support 9 is connected to the air source mechanism 4, and the air source mechanism 4 pumps compressed gas into the air receiving support 9.

[0029] The air inlet support 9 has a support frame 93 installed inside, and a spring 92 is installed in the middle of the support frame 93. The other end of the spring 92 is connected to the rubber block 91.

[0030] The support frame 93 is the frame body, and there is still a gap between it and the ventilation channel 10 to allow gas to pass through.

[0031] The air support 9 has an internal ventilation groove 10. The inner diameter of the ventilation groove 10 is larger than the outer diameter of the rubber block 91. When the rubber block 91 retracts inward and moves to a point in the ventilation groove 10, air escapes from the outside of the rubber block 91 through the ventilation groove 10.

[0032] One end of the insertion post 21 is provided with a sealing gasket 23. When the insertion post 21 is inserted into the guide groove 11, the sealing gasket 23 is sealed and squeezed against the inner wall of the guide groove 11.

[0033] A mold cavity 7 is provided in the middle of the fixed mold 1 and the moving mold 2. A pair of air passages 13 are provided on the inner wall of the mold cavity 7 located in the fixed mold 1. The air passages 13 are connected to the guide groove 11.

[0034] In this embodiment, hot fluid material is extruded from the material nozzle 6 into the mold cavity 7 in the middle of the fixed mold 1 and the moving mold 2. At this time, the film closing mechanism 3 drives the moving mold 2 to perform the film closing action, and the blow molding seat 5 realizes the blow molding action.

[0035] During this process, the insert pin 21 on one side of the moving mold 2 is inserted into the guide groove 11 of the fixed mold 1. The thinner trigger rod 22 at the front end of the insert pin 21 enters the air storage cavity 12 inside the guide groove 11 until the mold closing is completed. The trigger rod 22 and the rubber block 91 inside the air storage cavity 12 are pressed tightly together.

[0036] The rubber block 91, which is under pressure, retracts into the air-receiving support 9. At this time, the spring 92 is compressed until the outer wall of the rubber block 91 moves to a place in the air-venting groove 10. Since the inner diameter of the groove wall of the air-venting groove 10 is larger than the outer diameter of the rubber block 91, a gap sufficient for air to pass through is generated between the rubber block 91 and the air-venting groove 10. Under the continuous air supply action of the air source mechanism 4, the gas will quickly escape from this gap and enter the air storage chamber 12. The annular diaphragm 8 in the air storage chamber 12 deforms as the gas increases, thus achieving the effect of temporary gas storage.

[0037] Until the blow molding process is completed and the demolding process is carried out, during the retraction of the moving mold 2, the trigger rod 22 gradually disengages from the rubber block 91 and the insert 21 gradually disengages from the guide groove 11. At the instant the insert 21 disengages from the connection surface between the guide groove 11 and the air storage cavity 12, the gas pressure inside the annular diaphragm 8 is released and quickly escapes from the air storage cavity 12 into the guide groove 11. The guide groove 11 is provided with an air passage 13 that connects to the mold cavity 7. The air passage 13 guides the compressed gas into the mold cavity 7, and the gas will quickly enter the gap between the product and the inner wall of the curtain wall 7, which plays an auxiliary demolding role.

[0038] With each mold closing operation, the fixed mold 1 will perform a gas storage operation each time it connects with the moving mold 2, and guide the gas into the mold cavity 7 as the moving mold 2 retracts.

[0039] It should be noted that the film-closing mechanism 3, the material nozzle 6, and the blow molding nozzle 5 are standard configurations in blow molding machines, and their internal structures and operating principles are common knowledge to those skilled in the art and will not be explained further.

[0040] Air source unit 4, specifically a compressed air system, is a device that provides clean, dry, and pressure-stable compressed air.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A blow molding apparatus for PE plastic bottles, comprising a fixed mold (1) and a moving mold (2), characterized in that, The fixed mold (1) and the moving mold (2) form a molding die. The moving mold (2) is driven to move laterally by the film closing mechanism (3) to realize the mold closing action. A material nozzle (6) is provided above the fixed mold (1) to realize material supply. A blow molding nozzle (5) is connected to one side of the fixed mold (1). A pair of guide grooves (11) are provided on one side of the fixed mold (1). One side of the guide grooves (11) is connected to the air storage chamber (12). An annular diaphragm (8) is installed in the center of the air storage chamber (12). An air receiving support (9) is installed in the middle of one side of the air storage chamber (12). A rubber block (91) is installed inside the air receiving support (9) by a spring (92). The rubber block (91) is naturally sealed at the air outlet of the air receiving support (9). A pin (21) is installed on one side of the moving mold (2). The pin (21) and the guide groove (11) are interlocking mechanisms. One end of the pin (21) is provided with a thin trigger rod (22), which corresponds to and fits into the air cavity (12).

2. The PE plastic bottle blow molding apparatus according to claim 1, characterized in that, The outer wall of the annular diaphragm (8) is kept at a certain distance from the inner wall of the gas storage cavity (12) to allow for the deformation of the annular diaphragm (8).

3. The PE plastic bottle blow molding apparatus according to claim 1, characterized in that, One end of the gas receiving support (9) is connected to the gas source mechanism (4).

4. The PE plastic bottle blow molding apparatus according to claim 1, characterized in that, The air inlet support (9) has a support frame (93) installed inside, and a spring (92) is installed in the middle of the support frame (93). The other end of the spring (92) is connected to the rubber block (91).

5. The PE plastic bottle blow molding apparatus according to claim 1, characterized in that, The air-receiving support (9) has an air-venting groove (10) inside, and the inner diameter of the air-venting groove (10) is larger than the outer diameter of the rubber block (91).

6. The PE plastic bottle blow molding apparatus according to claim 1, characterized in that, One end of the insert (21) is provided with a sealing gasket (23). When the insert (21) is inserted into the guide groove (11), the sealing gasket (23) is sealed and squeezed against the inner wall of the guide groove (11).

7. The PE plastic bottle blow molding apparatus according to claim 1, characterized in that, The fixed mold (1) and the moving mold (2) have a mold cavity (7) in the middle. A pair of air passages (13) are provided on the inner wall of the mold cavity (7) of the fixed mold (1), and the air passages (13) are connected to the guide groove (11).

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