CN2546177Y

CN2546177Y - Stretching bar for plastic bottle blow molding machine

Info

Publication number: CN2546177Y
Application number: CN 02217992
Authority: CN
Inventors: 陈官福
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-05
Filing date: 2002-06-05
Publication date: 2003-04-23
Anticipated expiration: 2012-06-05

Abstract

Disclosed is a tension bar of a bottle blowing machine. The tension bar is a hollow duct connected at the tension cylinder of a bottle blowing machine; the wall of the duct is provided with air blowing side holes. An original tension bar which can not transfer air is changed to be a hollow duct together with an exiting air blowing valve (the original one-way valve which can only blow in air is replaced by a two-way valve which can not only blow in air but also discharge air )at the mouth of the bottle forms an air loop with one be the air inlet and the other be the air outlet; in particular, the air blown into the tension bar is cold air, so the purpose of blowing air to the plastic bottle and at the same time blowing out the air inside can be realized, meeting the quality requirement of plastic bottles for hot filling and high temperature sterilizing.

Description

Blower for plastic bottle stretching bar

Technical field

The utility model relates to the production equipment of plastic bottle, particularly relates to the bottle blowing machine stretching bar of producing hot filling or high temperature sterilization plastic bottle.

Background technology

Adopt two-step method to annotate the stretch blow technology and produce plastic beverage bottle, at first plastic raw materials such as PET are annotated and made bottle base, again bottle base is heated, bottle base after then will heating is put into the bottle blowing machine mould through the stretch blow moulding, the mould that uses is cold mould, the plastic bottle of making can only be used for splendid attire normal temperature liquid, as mineral water, oil, cola etc.If but packaged liquid is heatable substance, as hot tea, perhaps during high temperature sterilization, if pour in the plastic bottle of cold Mould Machining, plastic bottle can shrink immediately.Therefore, in order to adapt to the needs of hot filling or high temperature sterilization, must produce plastic bottle with heating mould.But behind the employing heating mould as still according to the disposable air blowing of existing bottle blowing method, the plastic bottle of production loses heat resistance very soon, does not still reach the requirement of hot filling or high temperature sterilization.So have only plastic bottle blank in mold heat, blow into cold air on one side be subjected to bottle blowing machine again after once blowing, just can make qualified products Yi Bian discharge hot gas, but existing bottle blowing machine has only a bottleneck purge valve, can't reach the purpose of the row while blowing.

Summary of the invention

The utility model is in order to overcome the defective of prior art, the improvement design of the stretching bar that a kind of bottle blowing function finishes limit air blowing limit exhaust is provided, the technical scheme of this bottle blowing machine stretching bar is: a stretching bar that is connected under the draft cylinder of plastic moulding machine, it is characterized in that described stretching bar is a hollow tube, it is lateral opening that the tube wall of stretching bar is shaped on air blowing.The air blowing of its stretching rod tube wall is lateral opening to be two or more.Because the stretching bar becomes lateral opening appendix is arranged, add existing bottleneck purge valve, just formed another gas return path of giving vent to anger of an air inlet, become the air cooling in the bar that particularly stretches and blow, the purpose of limit air blowing limit exhaust can be realized.When work, control by controlling organization, earlier from the air inlet of bottleneck purge valve, move downward but the stretching bar is not blown and to finish stretching, make bottle base blow out the bottle moulding, then the bottleneck purge valve changes into air bleeding valve, and the stretching bar is constantly blown, but air of blast-cold in bottle, the cooling air that is blown into is then discharged hot gas from air bleeding valve to the cooling of bottle wall.The plastic bottle of making so just is applicable to the requirement of hot filling or high temperature sterilization.

Description of drawings

Fig. 1 is the utility model blower for plastic bottle stretching bar schematic diagram.

The specific embodiment

The utility model discloses a kind of bottle blowing machine stretching bar of producing hot filling or high temperature sterilization (as various medicines, beer etc.) plastic bottle that is applicable to, the air cooling is blown in this stretching bar, has changed existing stretching bar and has only made the simple function that stretches.Concrete structure is a stretching bar that is connected under the draft cylinder of plastic moulding machine, and its described stretching bar is a hollow tube, and the tube wall of hollow tube stretching bar 1 is shaped on blows lateral opening 2.In order to make the cooling air in lateral opening 2 plastic bottles 3 that are blown into the mold heat 4, so the air blowing lateral opening 2 of stretching rod tube wall is a plurality of, the quantity according to the height and the volume size of plastic bottle are determined perforate is generally two or more.

Claims

1, blower for plastic bottle stretching bar, a stretching bar that is connected under the draft cylinder of plastic moulding machine is characterized in that described stretching bar (1) is a hollow tube, the tube wall of stretching bar is shaped on blow lateral opening (2).

2, blower for plastic bottle stretching bar as claimed in claim 1, the air blowing lateral opening (2) of the rod tube wall that it is characterized in that stretching is two or more.