CN105172107A - Bottle blowing machine and bottle blowing method - Google Patents

Abstract

The invention discloses a bottle blowing machine. The bottle blowing machine comprises blank conveying fingers and a bottle blowing mechanism. The bottle blowing mechanism comprises sealing openings, a side mold, a bottom mold, drawing rods and blank conveying finger position sensors. The drawing rods are located in the sealing openings and internally provided with outlets for compressed air for bottle blowing. According to the bottle blowing machine, the position sensors are additionally arranged, the positions of bottle blanks are determined in time, the drawing rods can rapidly stretch into the molds, the positions of sprues of the bottle blanks are corrected, and bottle walls are supported. The relative positions of the upper parts and the lower parts of bottle bodies are kept fixed, deformation of the bottle bodies is avoided, and the pass percent of the plastic bottles is increased.

Description

A kind of bottle blowing machine and bottle blowing method

Technical field

The present invention relates to a kind of bottle blowing machine and a kind of bottle blowing method.

Background technology

Plastic bottle makes simple due to it, and cost is low, is that one is widely used.Its production method is mainly by preheat bidirectional stretching blow molding machine (hereinafter referred to as bottle blowing machine) blow molding.Plastic bottle semi-finished product have cast gate bottom it in forming process, and cast gate is used for welding hanging ring.Shaping and the cast gate welding hanging ring of plastic bottle is by bottle blowing machine one-shot forming.

Bottle blowing machine is made up of three parts: Shang Pei mechanism, heating system and clamping; Plastic bottle is shaping main at clamping.Bottle embryo cast gate and suspension ring are welded on after embryo section and bringing-up section complete and enter matched moulds section; In matched moulds section, the action step of clamping is: the first step, and bottle embryo that is heated enters mould through sending embryo electricity cylinder finger; Second step, under bed die; 3rd step, matched moulds; 4th step, in sealing; 5th step, stretching bar is positioned at position 1, and stretching bar first time blows stretching simultaneously; 6th step, stretching bar position rises to position 2, stretching of blowing for the second time; Last plastic bottle is shaping.

Because after bottle embryo cast gate and suspension ring welding, temperature is higher, welding position is softer each other for bottle embryo cast gate and suspension ring, wait for that welding position temperature decline not only can affect the efficiency of bottle blowing, the temperature of bottle embryo more seriously can be caused to reduce and affect the quality of follow-up bottle blowing operation; Keep the high temperature of bottle embryo and reduce welding position temperature becoming conflict; How to ensure the quality of the plastic bottle that bottle blowing machine is produced and not reduce production efficiency be the key technical problem that those skilled in the art pay close attention to.

Summary of the invention

The object of this invention is to provide a kind of novel structure unique, easy to use, and effectively can promote the bottle blowing machine of plastic bottle quality.Concrete technical scheme is:

A kind of bottle blowing machine, comprises and send embryo to point and bottle mechanism; Described bottle mechanism comprises by sealing, Bian Mo, bed die, stretching bar and send embryo finger position sensor; The internal diameter of the external diameter of described stretching bar and the bottle embryo of plastic bottle is suitable; Stretching bar passes described sealing, with sealing slipper seal; Stretching bar is provided with the pore compressed air of bottle blowing being introduced described bottle embryo.

Further, embryo finger position sensor is sent to be infrared tube described in; The thickness of the supporting plate sending embryo to point described in the gap between described infrared tube is greater than, interdicts the infrared ray that infrared transmitting tube sends when the edge of described supporting plate passes described gap.

A kind of bottle blowing method, it is characterized in that, the concrete steps of bottle blowing are as follows:

1) embryo is sent to point top correspondence position bottle embryo being delivered to sealing;

2) bed die declines, and limit mould closes up, and forms bottle blowing chamber;

3) sealing is risen, and carries out shutoff to the bottleneck of bottle embryo;

4) the stretching bar in sealing stretches into a bottle embryo, supports to bottle embryo, corrects, make bottle embryo gate location return to the position of center to bottle embryo;

5) stretching bar retreats to a bottle embryo bottleneck;

6) open sealing compressed air air valve, compressed air, from the outlet blowout of sealing, starts bottle blowing oriented bottle embryo; After plastic bottle preliminarily forming, close sealing compressed air air valve;

7) stretching bar stretches into the middle part in bottle blowing chamber, air blowing oriented bottle embryo; Until plastic bottle completes shaping.

Bottle blowing machine of the present invention is by increasing displacement transducer, determine the position of bottle embryo in time, make stretching bar can stretch into rapidly the bottom of bottle embryo, bottle embryo gate location is corrected, and support bottle wall, keep the upper and lower two parts relative position of body to fix, avoid body distortion, improve the qualification rate of plastic bottle.

Accompanying drawing explanation

Fig. 1 is bottle blowing machine bottle mechanism decomposing schematic representation of the present invention;

Fig. 2 is the stretching bar primary importance view of bottle blowing machine;

Fig. 3 is the stretching bar second place view of bottle blowing machine;

Fig. 4 is displacement transducer scheme of installation;

Fig. 5 is the structural representation of bottle embryo;

Fig. 6 is the structural representation of the bottle embryo having welded suspension ring.

In figure: 1, seal; 2, stretching bar; 3, bottle embryo; 3-1; Cast gate; 3-2, suspension ring; 4, Bian Mo; 5, bed die; 6, embryo is sent to point; 7, position sensor; 7-1, gap; 8, supporting plate.

Detailed description of the invention

Embodiment is utilized more fully to illustrate the present invention below.The present invention can be presented as multiple multi-form, and should not be construed as the exemplary embodiment being confined to describe here.

For ease of illustrating, here can use such as " on ", the space relative terms such as D score " left side " " right side ", for illustration of the element of shown in figure or the feature relation relative to another element or feature.It should be understood that except the orientation shown in figure, spatial terminology is intended to comprise device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be positioned at other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise be located (90-degree rotation or be positioned at other orientation), and space used here illustrates relatively can correspondingly explain.

As shown in Figure 1 to Figure 3, the bottle blowing machine in the present embodiment, comprises and send embryo to point 6 and bottle mechanism; Bottle mechanism comprises by sealing 1, limit mould 4, bed die 5, stretching bar 2 and send embryo finger position sensor 7; Stretching bar position 2, in sealing 1, is coaxially arranged with sealing 1, and stretching bar 2 upper end is provided with the compressed-air actuated delivery outlet for bottle blowing.Delivery outlet can at top, also can in side.

As shown in Figure 4, send embryo finger position sensor 7 for infrared tube; Gap 7-1 between infrared tube is adaptive with the supporting plate 8 sending embryo to point, the infrared ray that supporting plate 8 sends through blocking infrared transmitting tube during the 7-1 of gap.The signal that supporting plate 8 passed and passed gap meeting trigger position sensor 7 changes.Position sensor 7 is arranged in place, accurately can judge whether the bottle embryo 3 sending embryo to point folded by 6 arrives position corresponding with sealing 1 above sealing 1 according to the signal condition of position sensor 7.

During specific works, first, send embryo to point 6 and clamp a bottle embryo, bottle embryo 3 is delivered to the top correspondence position of sealing 1; After bottle blowing machine receives the signal that bottle embryo 3 that position sensor 7 sends puts in place, drive bed die 5 to decline, limit mould 4 closes up; Formation bottle blowing chamber around bottle embryo 3.

Then seal 1 to rise, the bottleneck of bottle embryo 3 is inserted in upper end; And the bottleneck of bottle embryo 3 is sealed.

As shown in Figure 5, Figure 6, due to bottle embryo 3 feeding bottle mechanism before temperature higher, bottle embryo 3 and cast gate 3-1 all softer.If send the movement velocity of embryo finger 6 very fast, assigned address is arrived at bottle embryo 3, during rapid stopping, because the suspension ring 3-2 be welded on cast gate 3-1 is relatively heavier, suspension ring 3-2 is made to drive top and cast gate 3-1 position of displaced central axis under the effect of inertia of bottle embryo 3.This departing from can obtain partial correction in air blowing drawing process; But it is defective that the body difference of temperature contrast or bottle embryo 3 still has the medicine bottle that part bottle embryo 3 makes.In order to address this problem, have to reduce the speed of service and the stopping speed of sending embryo to point 6; This is difficult to promote with regard to making the efficiency of bottle blowing process.

In order to address this problem, in embodiment, the internal diameter of the diameter of stretching bar 2 and bottle embryo 3 is designed to suitable size, and change processing step, after sealing, do not start bottle blowing, but drive the stretching bar 2 in sealing 1 to stretch into bottle embryo 3, support to the bottom (position two) of bottle embryo 3, due to the diameter of stretching bar 2 and the internal diameter of bottle embryo 3 suitable, gap is less, the rectification of stretched bar 2, makes the cast gate 3-1 of bottle embryo 3 and suspension ring 3-2 location restore to the position of center.

Then, stretching bar 2 retreats to the bottleneck (position one) of bottle embryo 3; Open sealing compressed air air valve, compressed air blows out from the outlet of sealing 1, starts oriented bottle embryo 3 of blowing; After 0.1 second, plastic bottle is shaped substantially; Close sealing compressed air air valve, sealing 1 stops blowing; Stretching bar 2 stretches in the middle part of bottle blowing chamber, continues air blowing oriented bottle embryo 3; Blow after 0.5 second, plastic bottle is shaped completely.Seal 1 gassing time and stretching bar 2 to stretch into initial time in the middle part of bottle blowing chamber and movement velocity and gassing time and need to adjust according to the size of the plastic bottle of processing.

Bottle blowing compressed air is limited in 1.3 to 1.8Mpa scope; It is not full at the bottom of the too little meeting of bottle blowing compressed air causes bottle; And bottle blowing compressed air not only can cause waste too greatly, bottle local also can be made excessively thin, bring product quality hidden danger; Although this defect can detect in lamp inspection process, owing to filling with liquid, the waste of liquid also can be caused.

By improving, the plastic bottle quality of bottle blowing machine blowout is greatly improved, and the rate of qualifiid of the lamp inspection also brings up to 99.97% from 99.5%; And the distance that suspension ring depart from is reduced to from be substantially greater than suspension ring diameter 5% especially and is less than 1%; And being less than 1% for standard by deviation distance, the qualification rate of bottle blowing also can more than 99.97%.

Above-mentioned example, just for illustration of the present invention, in addition, also has multiple different embodiment, and these embodiments to be all those skilled in the art can expect after comprehension inventive concept, therefore, will not enumerate at this.

Claims (3)

1. a bottle blowing machine, comprises and send embryo to point and bottle mechanism; It is characterized in that, described bottle mechanism comprises by sealing, Bian Mo, bed die, stretching bar and send embryo finger position sensor; The internal diameter of the external diameter of described stretching bar and the bottle embryo of plastic bottle is suitable; Stretching bar passes described sealing, with sealing slipper seal; Stretching bar is provided with the pore compressed air of bottle blowing being introduced described bottle embryo.

2. bottle blowing machine as claimed in claim 1, is characterized in that, described in send embryo finger position sensor to be infrared tube; The thickness of the supporting plate sending embryo to point described in the gap between described infrared tube is greater than, interdicts the infrared ray that infrared transmitting tube sends when the edge of described supporting plate passes described gap.

3. a bottle blowing method, is characterized in that, the concrete steps of bottle blowing are as follows:

1) embryo is sent to point top correspondence position bottle embryo being delivered to sealing;

2) bed die declines, and limit mould closes up, and forms bottle blowing chamber;

3) sealing is risen, and carries out shutoff to the bottleneck of bottle embryo;

4) the stretching bar in sealing stretches into a bottle embryo, supports to bottle embryo, corrects, make bottle embryo gate location return to the position of center to bottle embryo;

5) stretching bar retreats to a bottle embryo bottleneck;

6) open sealing compressed air air valve, compressed air, from the outlet blowout of sealing, starts bottle blowing oriented bottle embryo; After plastic bottle preliminarily forming, close sealing compressed air air valve;

7) stretching bar stretches into the middle part in bottle blowing chamber, air blowing oriented bottle embryo; Until plastic bottle completes shaping.