CN108437411B

CN108437411B - Airflow type self-expansion forming bottle blowing device

Info

Publication number: CN108437411B
Application number: CN201810457867.8A
Authority: CN
Inventors: 邓发明; 陈清; 马根昌
Original assignee: Shenzhen Kaihongxin Electronic Technology Co ltd
Current assignee: Cangzhou Yikang Food And Drug Packaging Co ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2020-12-29
Anticipated expiration: 2038-05-14
Also published as: CN108437411A

Abstract

The invention provides an airflow type self-expansion forming bottle blowing device, which comprises a forming module, wherein a forming cavity is processed in the forming module, a bottle blank to be formed is arranged at the upper part of the forming cavity, the opening of the bottle blank faces upwards, a main air blowing valve capable of moving up and down is arranged at the upper part of the opening of the bottle blank, the lower part of the main air blowing valve is hermetically assembled with the opening at the upper part of the bottle blank, and high-pressure hot air can be blown into the bottle blank by the main air blowing valve; the side wall of the forming cavity is processed with a forming pore and an air return hole, the forming pore is connected with the high-pressure air channel through a forming control block, and the air return hole is connected with the air exhaust module through the forming control block. The device only needs same one shaping module just can make different bottle shapes, and the manufacturing process is simple swift, and the bottle shape manufacturing cost of small batch is lower.

Description

Airflow type self-expansion forming bottle blowing device

Technical Field

The invention belongs to the technical field of bottle blowing equipment, and particularly relates to an airflow type self-expansion forming bottle blowing device.

Background

Plastic bottle containers are indispensable filling materials in the production and life of the society at present. The existing plastic bottle is processed in a blow molding mode, in the blow molding process, a bottle blank processed in advance is placed in a blow molding die, high-pressure hot gas is blown into the bottle blank through high-pressure equipment, so that the plastic bottle blank is softened and expanded, and the plastic bottle can be finally molded in the bottle blank through the limitation of a bottle body die. The shape of the bottle body is determined by the shape of the mold. One mould can only process a bottle shape, when needs process different bottle shapes, need change different moulds, mould volume processing replacement cost is comparatively high, makes like this that it is comparatively inconvenient when processing different plastics bottle shapes with the mode of blowing, and especially when processing a small amount of bottle shapes, processing cost is comparatively high, owing to need preparation mould for whole process time is longer.

Disclosure of Invention

Aiming at the problems, the invention provides the air flow type self-expansion forming bottle blowing device which can process the bottle body in an external air flow mode and can directly process different bottle bodies.

The technical scheme adopted by the invention for solving the technical problems is as follows: the airflow type self-expansion forming bottle blowing device comprises forming modules, wherein the forming modules are divided into two blocks which are bilaterally symmetrical, a forming cavity is processed in each forming module, a bottle blank to be formed is arranged at the upper part of each forming cavity, the opening of the bottle blank faces upwards, a main air blowing valve capable of moving up and down is assembled at the upper part of the opening of the bottle blank, the lower part of the main air blowing valve is hermetically assembled with the opening at the upper part of the bottle blank, and high-pressure hot air can be blown into the bottle blank by the main air blowing valve; the side wall of the forming cavity is processed with a forming pore and an air return hole, the forming pore is connected with the high-pressure air channel through a forming control block, and the air return hole is connected with the air exhaust module through the forming control block.

Preferably, the molding cavity is cylindrical, the molding pores and the air return holes are uniformly distributed on the wall of the molding cavity in an annular mode, the air exhaust module is communicated with the high-pressure air path, and the diameter of the molding pores is smaller than that of the air return holes.

Preferably, the molding pores are divided into two or more groups from top to bottom in the molding cavity, and the molding pores of each group are annularly arranged along the axis of the molding cavity.

Preferably, the air return holes are divided into two groups from top to bottom in the forming cavity, and the air return holes in each group are annularly arranged along the axis of the forming cavity.

Preferably, the outside of the forming cavity is wrapped by a control cavity, the wall of the control cavity is provided with the forming control block, and the forming control block is respectively connected with the forming fine hole and the air return hole through a metal hose.

Preferably, the lower part of the forming cavity is provided with a bottom hole, and the bottom hole is connected with the high-pressure air path through a bottom control block.

Preferably, a fixed block is assembled at the upper part of the molding cavity, the bottle blank is assembled on the fixed block, the fixed block is fixedly connected with the upper part of the bottle blank, and the molding module is rotatably assembled with the fixed block.

The invention has the beneficial effects that: when the airflow type self-expansion forming bottle blowing device is used, hot high-pressure gas is filled into a bottle blank through the main air blowing valve, so that the bottle blank expands, high-pressure airflow is blown into the forming cavity through the forming fine holes, then the main air blowing valve is closed, the airflow blown out of the forming fine holes is blown onto the bottle blank, so that the bottle blank can be shaped, the air return holes and the forming fine holes are opened simultaneously, so that constant pressure is kept in the forming cavity, the stability of the airflow blown out of the forming fine holes is ensured, the temperature in the forming cavity can be reduced after the shape of the bottle body is stable, the bottle body is stably formed, and then the bottle body can be conveniently taken out by closing the air return holes and the forming fine holes. The device during operation heats the inflation through main air outlet valve to the bottle base, and the air current that blows out through the shaping pore carries out moulding to the expanded bottle, as long as control the air current size that each shaping pore blown out through the shaping control block like this, just so can conveniently produce the bottle shape of needs, when the bottle shape that needs the difference, only need change each shaping pore blow out the air current can. Therefore, different bottle shapes can be manufactured only by the same forming module, the manufacturing process is simple and quick, and the small-batch bottle shape production cost is lower.

Drawings

Fig. 1 is a schematic structural diagram of a forward section of an airflow type self-expansion molding bottle blowing device.

Detailed Description

The invention is further illustrated by the following examples:

as shown in the embodiment of fig. 1, the airflow type self-expansion forming bottle blowing device adopts a structure similar to that of a conventional bottle blowing device, and comprises a forming module 1, wherein the forming module 1 is divided into two blocks which are bilaterally symmetrical, a forming cavity 11 is processed inside the forming module 1, a bottle blank 2 to be formed is arranged at the upper part of the forming cavity 11, the opening of the bottle blank 2 is upward, a main air blowing valve 3 capable of moving up and down is arranged at the upper part of the opening of the bottle blank 2, the lower part of the main air blowing valve 3 is hermetically assembled with the opening at the upper part of the bottle blank 2, and the main air blowing valve 3 can blow high-pressure hot air into the bottle blank 2; the left and right blocks of the forming module 1 can be relatively opened, when bottle blowing work is required, the forming module 1 is opened, a bottle blank 2 is placed into a forming cavity as shown in figure 1, then the main air blowing valve 3 is lowered, and the upper end of the bottle blank 2 is tightly pressed and closed. In the device, a forming pore 12 and an air return hole 13 are processed on the side wall of the forming cavity 11, the forming pore 12 is connected with a high-pressure air passage through a forming control block 4, and the air return hole 13 is connected with an air extraction module through the forming control block 4.

When the airflow type self-expansion molding bottle blowing device is used, hot high-pressure gas is filled into the bottle blank 2 through the main air blowing valve 3, so that the bottle blank 2 expands, high-pressure airflow is blown into the molding cavity through the molding fine holes 12, then the main air blowing valve 3 is closed, the airflow blown out from the molding fine holes 12 is blown onto the bottle blank 2, so that the bottle blank 2 can be molded, the air return holes 13 and the molding fine holes 12 are opened simultaneously, so that constant pressure is kept in the molding cavity 11, the airflow blown out from the molding fine holes 12 is ensured to be stable, when the airflow blown out from the molding fine holes 12 impacts on an expanded bottle body, the bottle body can deform, and the bottle body can be formed into a required shape through blowing at different airflow strengths of all the molding fine holes 12. After the shape of the bottle body is stable, the temperature in the forming cavity 11 can be reduced to ensure that the bottle body is stably formed, and then the air return hole 13 and the forming fine hole 12 are closed to conveniently take out the bottle body. The device during operation heats inflation to bottle base 2 through main air outlet valve 3, and the air current that blows out through shaping pore 12 carries out moulding to the expanded bottle, as long as control the air current size that each shaping pore 12 blew out through shaping control block 4 like this, just so can conveniently produce the bottle shape of needs, when the bottle shape of needs difference, only need to change each shaping pore blow out the air current can. Therefore, different bottle shapes can be manufactured only by the same forming module 1, the manufacturing process is simple and rapid, and the small-batch bottle shape production cost is lower.

In the specific design, as shown in fig. 1, the forming cavity 11 is cylindrical, and the forming pores 12 and the air return holes 13 are uniformly distributed on the wall of the forming cavity 11. The design of the cylindrical cavity of the forming cavity 11 is more convenient for processing cylindrical bottle bodies. The air pumping module is communicated with the high-pressure air path, so that hot air in the molding cavity 11 can be pumped out and discharged into the high-pressure air path through the air return hole 13 through the air pumping module, an air pumping pump is designed in the air pumping module, the air can be pumped into the molding cavity 11, the air is pressurized and then discharged into the high-pressure air path, the air is supplied to the high-pressure air path, the use of the high-pressure air can be effectively reduced, and meanwhile, the loss of heat in air circulation can be effectively reduced due to the fact that the air in the molding cavity 11 needs to have a certain temperature. Simultaneously, after the device just processes and shapes the bottle blank 2, cold air can be blown into the forming fine holes 12, so that the bottle shape can be cooled and fixed more quickly, and the processing speed of the plastic bottle is improved.

In the present embodiment, the diameter of the forming pore 12 is smaller than the diameter of the return air hole 13. Specifically, the total air exhaust cross section of all the air return holes 13 is much larger than the air blowing cross section of all the forming pores 12, so that the air flow blown out by the forming pores 12 has a larger air speed, is less affected by the air return holes 13, and has a better plasticity effect.

In the specific design, as shown in fig. 1, the forming pores 12 are divided into two or more groups from top to bottom in the forming cavity 11, and the forming pores 12 of each group are annularly arranged along the axis of the forming cavity 11. Due to the structural design, the forming fine holes 12 are densely distributed in the forming cavity 11, the bottle-shaped structure with symmetrical centers can be conveniently machined, and the forming fine holes 12 of each group can be connected into the air outlet cavity of the same forming control block 4 during specific connection, so that the control is simpler and more convenient. In the present embodiment, the air returning holes 13 are divided into two groups from top to bottom in the molding cavity 11, and the air returning holes 13 in each group are arranged annularly along the axis of the molding cavity 11. Two sets of air return holes 13 are vertically symmetrical, so that the air exhaust effect is better.

In this embodiment, the outside of the forming cavity is wrapped by a control cavity 41, the wall of the control cavity is assembled with the forming control block 4, and the forming control block 4 is connected with the forming fine hole 12 and the air return hole 13 through metal hoses respectively. The parcel the control chamber 41 of one-tenth die cavity 11 has the heat preservation effect, be in the high temperature state during the inside work of one-tenth die cavity 11, the design of control chamber 41 not only can reduce thermal loss, can effectively keep apart the high temperature in the control chamber 41 simultaneously for the device during operation is safer more.

In the specific design, as shown in fig. 1, a bottom hole 14 is processed at the lower part of the forming cavity 11, and the bottom hole 14 is connected with a high-pressure air passage through a bottom control block 5. In this way, a high-pressure air stream can be blown out of the bottom opening, so that the bottle-shaped lower part can be shaped.

As shown in fig. 1, a fixing block 6 is assembled at the upper part of the molding cavity 11, the bottle preform is assembled on the fixing block 6, the fixing block 6 is fixedly connected with the upper part of the bottle preform 2, and the molding module 1 is rotatably assembled with the fixing block 6. In the process of blowing bottles by the device, the forming module 1 can be rotated, so that the forming fine holes 12 and the air return holes 13 on the inner part of the forming cavity 11 rotate along with the forming module, and therefore annular air flow is formed on the bottle body, and the bottle body forming effect is better.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An airflow type self-expansion molding bottle blowing device comprises a molding module (1), wherein the molding module (1) is divided into two blocks which are bilaterally symmetrical, a molding cavity (11) is processed inside the molding module (1), a bottle blank (2) to be molded is arranged at the upper part of the molding cavity (11), the opening of the bottle blank (2) is upward, a main air blowing valve (3) capable of moving up and down is assembled at the upper part of the opening of the bottle blank (2), the lower part of the main air blowing valve (3) is hermetically assembled with the opening at the upper part of the bottle blank (2), and high-pressure hot air can be blown into the bottle blank (2) by the main air blowing valve (3); the method is characterized in that: processing has shaping pore (12), return air hole (13) on the limit wall of shaping chamber (11), shaping pore (12) link to each other with high-pressure gas circuit through shaping control block (4), return air hole (13) link to each other with the module of bleeding through shaping control block (4).

2. An air-flowing type self-expansion molding bottle blowing device according to claim 1, characterized in that: the forming cavity (11) is cylindrical, forming pores (12) and air return holes (13) are uniformly distributed on the hole wall of the forming cavity (11), the air suction module is communicated with the high-pressure air passage, and the diameter of each forming pore (12) is smaller than that of each air return hole (13).

3. The airflow type self-expansion bottle blowing device according to claim 2, wherein the forming fine holes (12) are divided into two or more groups from top to bottom in the forming cavity (11), and the forming fine holes (12) of each group are arranged annularly along the axis of the forming cavity (11).

4. An air-flowing type self-expansion molding bottle blowing device according to claim 2, characterized in that: the air return holes (13) are divided into two groups from top to bottom in the molding cavity (11), and the air return holes (13) in each group are annularly arranged along the axis of the molding cavity (11).

5. An air-flowing type self-expansion molding bottle blowing device according to claim 1, characterized in that: the outer portion of the forming cavity is wrapped by a control cavity (41), the forming control block (4) is assembled on the cavity wall of the control cavity, and the forming control block (4) is connected with the forming fine hole (12) and the air return hole (13) through metal hoses respectively.

6. An air-flowing type self-expansion molding bottle blowing device according to claim 1, characterized in that: and a bottom hole (14) is processed at the lower part of the forming cavity (11), and the bottom hole (14) is connected with a high-pressure air path through a bottom control block (5).

7. An air-flowing type self-expansion molding bottle blowing device according to claim 1, characterized in that: the upper portion of the molding cavity (11) is provided with a fixing block (6), the bottle blank is assembled on the fixing block (6), the fixing block (6) is fixedly connected with the upper portion of the bottle blank (2), and the molding module (1) and the fixing block (6) are rotatably assembled.