CN1240705A

CN1240705A - Plastic bottle with deep recess bottom and its manufacture method

Info

Publication number: CN1240705A
Application number: CN 99114309
Authority: CN
Inventors: 李缵缨
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-07-08
Filing date: 1999-07-08
Publication date: 2000-01-12
Anticipated expiration: 2019-07-08
Also published as: CN1089670C

Abstract

A method for making plastic bottle with deep recess at its bottom features that the bottle mould with internal moulding cavity matched with the profile of plastic bottle has a bottom which is nested with bottom mould. Said bottom mould has a central through hole with big diameter at both ends and small diameter in central part. A movable moulding pin matched with said through hole in size is sleeved by the through hole. Its both ends are made into bigger-diameter stop flanges and its central partis longer than that of the thinner part of through hole, so the movable moulding pin can slide back and forth and is extended out of the top of bottom mould. An air chamber is formed in the front of movable moulding pin and through hole.

Description

The bottom has the plastic cement bottle and the manufacture method thereof of deep recess

The present invention relates to plastic cement bottle and manufacture method thereof that a kind of bottom has deep recess.

Existing plastic cement bottle is owing to be subject to production method, all be designed to slick and sly saturated appearance, and it is limited with the cushion space that shrinks to expand, be difficult to bear the influence of rising-heat contracting-cold, so behind the liquid of can heat, if it is in addition airtight, after liquid cooling, promptly can form the situation of torsional deflection or depression, but fruit juice, Sugared beverages edible beverages such as (not containing vapour) then when manufacturing, often heating earlier so that mixed dissolution, or use the mode of hot filling to load, to prevent that bacterium from growing easily in container filling, cause and addle, but because the plastic cement bottle has above shortcoming, so traditional way is to use glass bottle to carry out hot filling, or add anti fouling composition therein, and change the mode that adopts cold filling into.Yet glass bottle is filled with shortcomings such as weight is not light, frangible, and adding anti fouling composition can be harmful, and the hot solution cold-penetration is equipped with the slow shortcoming of flow process time lengthening, energy dissipation and speed of production; In addition, contain the beverage or the can of alcohol material of vapour after, because of the cushion space that do not have to expand, all make bottle explosion damage, poor stability easily so rock or collide; Moreover, existing plastic cement bottle is when producing, the bottom of mould is mono-bed die (as shown in Figure 1), when the demoulding, can form the vacuum suction effect between the bottle end and bed die, cause the depression of plastic cement bottle bottom only can be designed to low shallow shape, so the weight of beverage in the bottle, have only fraction along low shallow depression edge guides to bottle at the end, thereby can't effectively produce the effect of expansion floor space and pressure holding, have the not enough shortcoming of stability of standing, so will be improved.

Purpose of the present invention is exactly that it is big to propose a kind of expansion space in order to address the above problem, and the bottom that heat-resisting resistance to pressure is good has the plastic cement bottle and the manufacture method thereof of deep recess.

Another object of the present invention is to rely on plastic cement bottle bottom to form darker depression, and can guide the weight of bottle interior beverage, and periphery at the bottom of extending to than bevelled depression lateral margin bottle makes it to produce floor space and the pressure-proof effect expanded, the stability that increase is stood.

Technical solution of the present invention:

A kind of bottom has the plastic cement bottle and the manufacture method thereof of deep recess, it is characterized in that it will be formed with the bottle mould of plastic cement bottle external form hollow die cavity, in the nested hollow mould that is formed with through hole above only being connected in its bottom with bed die, and bed die has the narrower vertical through hole of two ends diameter broad mid diameter in central authorities, in through hole, be socketed with the shuttering end of similar valve body, this shuttering end matches with the size of through hole, its front and back end is formed with the bigger retaining edge of diameter, and its stage casing neck bar slightly is longer than the length of diameter narrower region in the bed die through hole, thereby can impel before and after the shuttering end slippage back and forth and protrude out the bed die top, and be formed with air chamber at shuttering end and through hole front end, before bottle blowing is shaped, earlier with external force by the convex bed die top of stretching out of bottom ejection shuttering end, the through hole places a bottle embryo up again, impel bottle embryo to be blow molded into the plastic cement bottle according to the die cavity of mould, and when the demoulding, impel the external force of ejection shuttering end to disappear earlier, and the air in shuttering end and the through hole front end air chamber can be stayed rapidly into hole, cave, plastic cement bottle bottom by the gap, make that shuttering end can itself gravity or pulling force a little, can impel shuttering end to drop easily fast, make the present invention and load the plastic cement bottle that beverage is used along the bed die center through hole.

It is not good to the present invention is directed to the heat-resisting existing resistance to pressure of existing plastic cement bottle, inconvenience is used for the shortcoming of hot filling or splendid attire carbonated beverage, the mould that plastic cement bottle bottle blowing is used is designed to the narrower through hole of two ends diameter broad mid diameter in the middle of its bed die, and in the bed die through hole, be socketed with similar valve body can before and after back and forth slippage protrude out the shuttering end on bed die top, make when bottle blowing is shaped, try hard to recommend the shuttering end convex bed die top of stretching out in top beyond behind mold closing, impel plastic cement bottle according to the mould blowing, darker hole, cave can be formed on the bottom, and when the demoulding, the external force of ejection shuttering end is disappeared, because shuttering end and center through hole front end are formed with air chamber, by the gravity of shuttering end itself or pulling force a little, can impel shuttering end to drop easily fast along the bed die center through hole, and the air in the air chamber also can be stayed rapidly into hole, cave, plastic cement bottle bottom by the gap, and can not produce the situation that the vacuum demoulding is difficult for, and because the bottom of the plastic cement bottle after being shaped has darker depression, so can reserve the big expansion space of filling heat or carbonated beverage, and periphery at the bottom of most component of beverage weight also can be directed to along the lateral margin along deep recess bottle in the bottle, then increase stability of standing and pressure-proof effect, had good social benefit and economic benefit.

Fig. 1 is the partially cut-away side view of existing bottle blowing mould;

Fig. 2 is the partially cut-away side view of bottle blowing mould embodiment of the present invention;

Fig. 3 is the base section lateral plan of the plastic cement bottle made of the present invention.

Among the figure, 1-bottle mould 2-bed die 10-die cavity 20-through hole 21-shuttering end 22-retaining edge 23-air chamber 24-neck bar

Below in conjunction with accompanying drawing the present invention is further described:

As Fig. 2,3, the bed die 2 that the inventive method is used the bottle mould 1 be positioned at lateral margin and is positioned at the bottom is manufactured, wherein be formed with hollow die cavity 10 in the bottle mould 1 according to plastic cement bottle exterior design, and be formed with the hollow mould of through hole above only being connected in that its bottom is nested with bed die 2, bed die 2 has the narrower vertical through hole 20 of two ends diameter broad mid diameter in central authorities again, and in through hole 20, be socketed with the shuttering end 21 of similar valve body, this shuttering end 21 matches with the size of through hole 20, its front and back end is formed with the bigger retaining edge 22 of diameter, and its stage casing neck bar 24 slightly is longer than the length of diameter narrower region in bed die 2 through holes 20, so can impel the slippage and protrude out bed die 2 tops back and forth of shuttering end 21 front and back, and be formed with air chamber 23 at shuttering end 21 and through hole 20 front ends.

During the manufacturing, earlier with bottle mould 1 and the bed die 2 nested moulds that are connected into hollow, before bottle blowing is shaped, with external force by bottom ejection shuttering end 21 convex bed die 2 tops of stretching out, through hole 20 places place a bottle embryo up again, impel bottle embryo to be blow molded into the plastic cement bottle according to the die cavity 10 of mould, and when the demoulding, impel the external force of ejection shuttering end 21 to disappear earlier, and shuttering end 21 is formed with air chamber 23 with through hole 20 front ends, 23 interior air can be stayed rapidly into hole, cave 25, plastic cement bottle bottom by the gap in the air chamber, make that shuttering end 21 can itself gravity or pulling force a little, can impel shuttering end 21 to drop easily fast along bed die 2 center through hole 20, and can not produce the situation that the vacuum suction demoulding is difficult for, so plastic cement bottle bottom can be designed to dark and than hole, bevelled cave 25, and because the protrusion of shuttering end 21, can cause 25 tops, hole, cave, plastic cement bottle bottom to be upwards protrudes out, when can hot beverage or carbonated beverage, and after airtight in addition, because the gas that interior dress solution generates produces expansion, impel plastic cement bottle volume inside to be pushed and strengthened, and the space that protrudes out on darker hole, cave 25, plastic cement bottle bottom and its top, expanded by its ejection downwards, for reserving cushion space when the expansion in the bottle inner space, unlikely distortion and distortion, and can be used as heat-resisting and the pressure bottle use, again because plastic cement bottle bottom than hole, bevelled cave 25, can guide the weight of bottle interior beverage, extend to a bottle bottom perimeter along bevelled depression lateral margin, so can effectively produce expansion floor space and pressure-proof effect, increase the stability that the plastic cement bottle is stood.

Claims

1. a bottom has the plastic cement bottle and the manufacture method thereof of deep recess, it is characterized in that it will be formed with the bottle mould of plastic cement bottle external form hollow die cavity, in the nested hollow mould that is formed with through hole above only being connected in its bottom with bed die, and bed die has the narrower vertical through hole of two ends diameter broad mid diameter in central authorities, in through hole, be socketed with the shuttering end of similar valve body, this shuttering end matches with the size of through hole, its front and back end is formed with the bigger retaining edge of diameter, and its stage casing neck bar slightly is longer than the length of diameter narrower region in the bed die through hole, thereby can impel before and after the shuttering end slippage back and forth and protrude out the bed die top, and be formed with air chamber at shuttering end and through hole front end, before bottle blowing is shaped, earlier with external force by the convex bed die top of stretching out of bottom ejection shuttering end, the through hole places a bottle embryo up again, impel bottle embryo to be blow molded into the plastic cement bottle according to the die cavity of mould, and when the demoulding, impel the external force of ejection shuttering end to disappear earlier, and the air in shuttering end and the through hole front end air chamber can be stayed rapidly into hole, cave, plastic cement bottle bottom by the gap, make that shuttering end can itself gravity or pulling force a little, can impel shuttering end to drop easily fast, make the present invention and load the plastic cement bottle that beverage is used along the bed die center through hole.