CN110539472A

CN110539472A - Air bag structure and blow molding method

Info

Publication number: CN110539472A
Application number: CN201910755290.3A
Authority: CN
Inventors: 张银龙
Original assignee: Shanghai Longda Plastic Polytron Technologies Inc
Current assignee: Shanghai Longda Plastic Polytron Technologies Inc
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2019-12-06

Abstract

the invention discloses a blow molding method of an air bag structure, which relates to the technical field of extrusion blow molding products and comprises the following steps: s1, melting and plasticizing the plastic by the extruder, and driving the melted and plasticized plastic to enter the extruder head by the screw; s2, extruding two sheet-shaped parisons by the head of the extruder, clamping the lower ends of the parisons when the parisons descend to the set positions, and adsorbing the two sheet-shaped parisons on the left and right molds respectively; s3, placing an insert between the two sheet-shaped parisons from any angle, wherein the insert is a corrugated pipe; s4, after the insert is placed, mold closing is started; s5, after die assembly is finished, the corrugated pipe is wrapped by the sheet-shaped parison, and after blowing is finished, cooling and pressure maintaining are carried out, so that the invention has the beneficial effects that: utilize bellows flexible characteristic, simplified the structure of blowing when the gasbag shaping greatly, the shaping rate is high, of high quality for production efficiency promotes greatly, has shortened the shaping cycle, and the cost also obtains reducing simultaneously.

Description

air bag structure and blow molding method

Technical Field

The invention relates to the technical field of extrusion blow molding, in particular to an air bag structure and a blow molding method.

Background

the traditional air bag forming method is that a round parison is extruded by an extruder, when the parison reaches a certain position, an insert is put in from the bottom of the parison (only from the bottom), then mold closing is started, after the mold closing is finished, blowing is started, cooling is carried out for a period of time, after the cooling is finished, a mold is opened, and a workpiece is taken out.

As shown in the attached figure 2 of the specification, the insert formed by the traditional air bag is formed by connecting an air pipe 1, a cable tie 2, a connector 3 and a clamp 4. The inserts have more connecting parts, the connecting parts are complicated, the forming period of the whole air bag is longer, the efficiency is low, and when the number of the parts is more, the connection result is easy to make mistakes, and the quality of the finally formed air bag cannot be ensured.

Based on this, this application has proposed an gasbag structure and blow molding method.

Disclosure of Invention

The present invention is directed to an airbag structure and a blow molding method to solve the above problems.

in order to achieve the purpose, the invention provides the following technical scheme:

A method of blow molding an airbag structure comprising the steps of:

S1, melting and plasticizing the plastic by the extruder, and driving the melted and plasticized plastic to enter the extruder head by the screw;

s2, extruding two sheet-shaped parisons by the head of the extruder, clamping the lower ends of the parisons when the parisons descend to the set positions, and adsorbing the two sheet-shaped parisons on the left and right molds respectively;

S3, placing an insert between the two sheet-shaped parisons from any angle, wherein the insert is a corrugated pipe;

S4, after the insert is placed, mold closing is started;

and S5, after the die assembly is finished, the corrugated pipe is wrapped by the sheet-shaped parison, the sheet-shaped parison is blown through the corrugated pipe at a proper angle, after the blowing is finished, the sheet-shaped parison is cooled and pressure-maintained, then the die is opened, and the formed air bag is taken out.

As a still further scheme of the invention: the mold closing time is 0.5-0.8 seconds.

As a still further scheme of the invention: in step S2, the insert is placed between two sheets of the sheet parison by a mechanical transmission.

The utility model provides an air bag structure, includes gasbag body and the inserts of connection on the gasbag body, the inserts is the bellows for blow to the gasbag body.

as a further scheme of the invention: the corrugated pipe is made of linear low density polyethylene material.

compared with the prior art, the invention has the beneficial effects that: utilize bellows flexible characteristic, simplified the structure of blowing when the gasbag shaping greatly, the shaping rate is high, of high quality for production efficiency promotes greatly, has shortened the shaping cycle, and the cost also obtains reducing simultaneously.

Drawings

fig. 1 is a schematic structural view (straight tube type) of an airbag structure.

Fig. 2 is a schematic structural view of a conventional airbag molding mentioned in the background art.

Fig. 3 is a schematic structural view (elbow type) of a balloon structure.

FIG. 4 is a block diagram of a blow molding method for an airbag structure.

In the figure: 100-an airbag body, 200-an insert, 300-a left mold, 400-a right mold, 1-an air pipe, 2-a cable tie, 3-a joint and 4-a hoop.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Example 1

Referring to fig. 1 to 4, in an embodiment of the present invention, a method for blow molding an airbag structure includes the following steps:

S2, extruding two sheet-shaped parisons by the head of the extruder, clamping the lower ends of the parisons when the parisons descend to the set positions, and simultaneously adsorbing the two sheet-shaped parisons on the left die 300 and the right die 400 respectively;

S3, placing the insert between the two sheet-shaped parisons at any angle, specifically, placing the insert through a mechanical transmission device such as a manipulator, wherein the insert is a corrugated pipe and is preferably made of linear low-density polyethylene material;

S4, after the insert is placed, mold closing is started, and the mold closing time is 0.5-0.8 second;

And S5, after the die assembly is finished, the sheet-shaped parison covers the corrugated pipe, the corrugated pipe can rotate or bend due to the characteristics of the corrugated pipe, the sheet-shaped parison is blown through the corrugated pipe at a proper angle according to requirements, after the blowing is finished, the mold is cooled and maintained, and then the molded air bag is taken out.

because the bellows that this embodiment used can rotate or crooked, therefore can select suitable angle to blow to slice parison according to the demand, simplified the structure of blowing for production efficiency promotes greatly, and the cost also obtains reducing.

Example 2

Referring to fig. 1 to 3, in an embodiment of the present invention, an airbag structure includes an airbag body 100 and an insert 200 connected to the airbag body 100, where the insert 200 is a corrugated tube for blowing air into the airbag body 100, and the corrugated tube is preferably made of a linear low density polyethylene material, and compared with the air tube fixing method mentioned in the background art, the air blowing structure is greatly simplified, and the corrugated tube can rotate or bend, so that the airbag body 100 can be blown at a proper angle according to requirements, which is very convenient.

It should be noted that, in this technical scheme, utilize the flexible characteristic of bellows, simplified the structure of blowing when gasbag shaping greatly, the shaping rate is high, of high quality for production efficiency promotes greatly, has shortened the shaping cycle, and the cost also obtains reducing simultaneously.

other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method of blow molding an airbag structure, comprising the steps of:

S4, after the insert is placed, mold closing is started;

2. a blow molding method of an airbag structure according to claim 1, wherein the mold closing time is 0.5 to 0.8 seconds.

3. a method for blow-molding an airbag structure as claimed in claim 1, wherein the insert is interposed between the two sheet-shaped parisons by a mechanical actuator in step S2.

4. An airbag structure comprises an airbag body (100) and an insert (200) connected to the airbag body (100), and is characterized in that the insert (200) is a corrugated pipe and is used for blowing air to the airbag body (100).

5. An air-bag structure according to claim 1, wherein said bellows is made of a linear low density polyethylene material.