CN101195271A - Stretch blow molding shaping method for container bottle - Google Patents
Stretch blow molding shaping method for container bottle Download PDFInfo
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- CN101195271A CN101195271A CNA2006101193473A CN200610119347A CN101195271A CN 101195271 A CN101195271 A CN 101195271A CN A2006101193473 A CNA2006101193473 A CN A2006101193473A CN 200610119347 A CN200610119347 A CN 200610119347A CN 101195271 A CN101195271 A CN 101195271A
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- bottle
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Abstract
The invention discloses a stretch blow molding method of container bottles, which is characterized in that molten resin bottle base is sent into a baking furnace to be heated, a segment of reserved grip position of the bottle base is air-cooled, the temperature of the segment of the bottle base is enabled to be lower than the temperature of other portions, and then the heated bottle base is sent into a bottle-shaped mold to be stretch-blow-molded by using a stretch rod. The invention has the advantages that the bottle body engages with the grip portion to be hard to be blown through and poor molding is avoided, thereby increasing the quality of the container bottles.
Description
Technical field
The present invention relates to a kind of stretch blow molding shaping method that uses molten resin to make method, the especially container bottle of container bottle, be specially adapted to the moulding that stretch-blow needs the container bottle of secondary operations assembling handle.
Background technology
Container bottle especially by stretch blow-molded transparent resin container bottle, for attractive in appearance, easy to carry, need be equipped with handle on the container bottle.Present way is that container bottle and handle are separated making, after container bottle is stretch blow-molded, and then installs handle.So just require container bottle in the blowing process, on body, to reserve the position that handle is installed.Because container bottle breaks away from the traditional rule shape, so difficult forming particularly continuously during bottle blowing, is reserved the handle position, it is bad or blown brokenly to be very easy to moulding, causes handle to install, and becomes waste product.The production of this kind bottle type at present generally all avoids adopting the method for continuous bottle blowing, use single mode Artificial Control bottle blowing, and good in order to guarantee bottle type moulding, place handle in advance, cooperate bottle blowing, its blow moiding method is: make the position of placing handle in advance on bottle pattern tool, during blowing, by hand handle is installed on bottle pattern tool earlier, put into the resin bottle base after the heating then, matched moulds carries out bottle blowing, after the end, bottle is taken out by hand again.Such container bottle stretch blow molding process not only production efficiency is extremely low, the product rejection rate height, and need much manually, there is certain danger in operation.
Summary of the invention
First goal of the invention of the present invention provides the stretch blow molding shaping method of the good container bottle of a kind of moulding, and this stretch blow molding shaping method is difficult for the cooperation handle position with non-regular shape of container bottle is blown brokenly, to improve the quality of container bottle.
In order to realize the foregoing invention purpose, the stretch blow molding shaping method of container bottle of the present invention, it is characterized in that: the molten resin bottle base is sent into the baking oven heating, heating process is to the cooling of drying of the reservation handle position section of bottle base, make this section of bottle base temperature be lower than the other parts temperature, the bottle base after will heating is then sent in bottle pattern tool and is carried out the stretch blow moulding with the stretching bar.
Because in heating process, in advance to the cooling of drying of the reservation handle position section of bottle base, this section of bottle base temperature is reduced, thereby the molecularly oriented motion of this section is slowed down relatively, reduced the draw ratio of this section, when carrying out stretch blow after it enters bottle pattern tool, this section of bottle base stretches and relaxes, so just easier subsides volt is at the specific position of bottle pattern tool, and unlikely body cooperates the handle position to be blown brokenly.Therefore, the present invention has makes body cooperate the handle position to be difficult for blowing brokenly, avoids the bad advantage of moulding, has improved the quality of container bottle.
Second purpose of the present invention is to further improve the present invention, makes the stretch blow molding shaping method of container bottle of the present invention can realize continuous bottle blowing, even realizes full-automatic operation, to enhance productivity, reduces manpower, lowers dangerous.
In order to realize above-mentioned second purpose, in the further improvement of the stretch blow molding shaping method of container bottle of the present invention, the cooperation handle position of bottle pattern tool is adopted by two tenons of cylinder control and is stretched out indentation.
Stretch out two tenons of indentation owing to adopt cylinder control, when the bottle base after heating enters and carries out stretch blow in bottle pattern tool, two tenons of cylinder control stretch out, make bottle base blow out the shape of container bottle, after the container bottle moulding, cylinder is controlled two tenon indentations again, be beneficial to the demoulding of container bottle, after the demoulding, allow next bottle base enter a bottle pattern tool and carry out stretch-blow, work continuously.Therefore just can realize continuous bottle blowing like this, owing to be, therefore can realize the full-automation of stretch-blow fully again, reduce manpower, lower dangerous by the indentation of stretching out of cylinder control tenon.
In addition, in also further the improving of the stretch blow molding shaping method of container bottle of the present invention, for the non-regular position of container bottle and cooperate especially corner's easy-formation more of handle position, with further raising Forming Quality, when stretching bar bottom was to the bottle base stretch blow, the increase gas hole was assisted air blowing at non-regular position and cooperation handle position on the stretching bar.Like this along with the good draftability of heating bottle blank, and have at auxiliary air blowing, just be easy to moulding, and guaranteed non-regular position and cooperated the handle position that especially the same moulding of corner is good.
In sum, the stretch blow molding shaping method of container bottle of the present invention, can realize continuous bottle blowing, having the body of making cooperates the handle position not blown brokenly, avoid the bad advantage of moulding, not only improved efficiency, the product quality of raising, and can reduce manpower, stopped original manually-operated danger.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the shape schematic diagram of the imperial fish edible oil bottle of 2.5L gold;
The schematic diagram that Fig. 2 heats in baking oven for bottle base;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 needs the position of section on the bottle embryo, reservation handle position of blowing cooling for expression;
Fig. 5 is a stretching bar stretch-blow bottle base, container bottle forming process schematic diagram;
Fig. 6 stretches out the schematic diagram of indentation for adopting by two tenons of cylinder control in the bottle pattern tool.
Among the figure: 1, the cooperation handle position 2 of container bottle, handle 3, tongue-and-groove 4, bottle base 41 is reserved handle position section 5, baking oven 51, heating fluorescent tube 52, distribution fluorescent tube 6, mandrel conveyer 7, cold wind blower 8, bottle pattern tool 81, tenon 82, cylinder 83, the cooperation handle position 9 of bottle pattern tool, stretching bar 91, gas hole
The specific embodiment
The stretch blow molding shaping method of container bottle of the present invention, its process is as follows: the molten resin bottle base is sent into the baking oven heating, heating process is to the cooling of drying of the reservation handle position section of bottle base, make this section of bottle base temperature be lower than the other parts temperature, the bottle base after will heating is then sent in bottle pattern tool and is carried out the stretch blow moulding with the stretching bar.Wherein in bottle pattern tool, use in the process of stretching bar stretch blow moulding at heating bottle blank, the cooperation handle position of bottle pattern tool, two tenons that employing is stretched out indentation by cylinder control replace originally placing handle in advance in bottle pattern tool.Since in to bottle base heating process to reserving the cooling of drying of handle position section, this section of bottle base temperature is reduced, thereby the molecularly oriented motion of this section is slowed down relatively, reduced the draw ratio of this section, after entering bottle pattern tool, it draws high when blowing, this section of bottle base stretches and relaxes, so just easier subsides volt is at the specific position of bottle pattern tool, unlikely body cooperates the handle position to be blown brokenly, stretch out two tenons of indentation owing to cooperate the handle position to adopt in the employing bottle pattern tool again by cylinder control, so just can save the artificial handle of placing in bottle pattern tool, feasible bottle blowing is continuously realized the stretch blow-molded full-automation of container bottle, thereby is raised labour efficiency, reduce manpower, stop manually-operated danger.
The stretch blow molding shaping method of container bottle of the present invention can be suitable for the inhomogeneous molten resin container bottle of moulding, introduces the present invention in order to know, is example with the handled container bottle of moulding PETG below.
As shown in Figure 1, the figure illustrates the shape of the golden imperial fish 2.5L edible oil bottle of selling the market, the material that this container bottle adopts is a PETG.Wherein cooperation handle position 1 shape of this container bottle is more special, is non-regular shape, and many depressions and turning are arranged, as is used for fixing the tongue-and-groove 3 of handle, not only has depression, and has rapid turning.Therefore in the forming process of this kind container bottle, the moulding of this part is difficulty very, and moulding is bad easily, even blows brokenly, causes handle 2 to install.In addition, existing forming method in the stretch blow-molded process, needs handle is installed in bottle pattern tool in advance in bottle pattern tool, and then the bottle base of putting into after the heating carries out bottle blowing, after the end, manual again the container bottle after the moulding from taking out.So existing forming method, not only production efficiency is extremely low, the product rejection rate height, and need much manually operate dangerous property.
The PETG bottle base 4 that the stretch blow molding shaping method of present container bottle of the present invention at first uses injection moulding in advance to produce is orderly by the arrangement of reason base machine, baking oven 5 temperature adjustment are reached 180 ℃ or higher, bottle base 4 is sent into baking oven 5 by mandrel conveyer 6 to be heated, for bottle base 4 is heated evenly, reach optimum efficiency, mandrel conveyer 6 is sent into bottle base in the process of baking oven 5, makes bottle base 4 continuous rotations.In order to save the energy, baking oven is built-in with circulation heat transfer blower fan, and the general 35～37kw of power makes the temperature of bottle base 4 reach 116 ℃～120 ℃.As shown in Figures 2 and 3.
During bottle base 4 is advanced, one section cold wind blower 7 is set in baking oven 5, adjusts the position, to the cooling of drying of 41 (as shown in Figure 4) of reservation handle position section of bottle base, when making this section temperature drop to 105 ℃～110 ℃, and the other parts temperature of bottle base still remains on 116 ℃～120 ℃.
As Fig. 5, shown in Figure 6, send into a bottle pattern tool 8 by the bottle base of getting after the base manipulator will heat then.Close a bottle pattern tool 8, stretching bar 9 is started working, and to the bottle base pre-blowing simultaneously that stretches, pre-blowing pressure is 9.5kg/cm from bottle base bottom
2～10.5kg/cm
2Simultaneously stretching bar 9 is improved,, establish gas hole 91 newly, blow facing to the position that cooperates handle on the body.In the time of pre-blowing, 83 places, cooperation handle position of bottle pattern tool, the control cylinder 82 of tenon 81 is up and down started working, and stretches out tenon 81 up and down, guarantees that the cylinder pressure of bottle pattern tool 8 inner control tenons remains on 9.5kg/cm this moment
2～10.5kg/cm
2Between.Pre-blowing finishes laggard horizontal high voltage blows, and high pressure blow-gas pressure generally is controlled at 32kg/cm
2～35kg/cm
2Between, continued 0.90 second or more how after.Begin exhaust at last, cylinder 82 control bottle pattern tools 8 interior tenons 81 up and down begin to reclaim simultaneously, and die sinking is taken out bottle and send into streamline and go up the handle machine automatically in mould by getting bottle manipulator, and handle is installed.
Specifically, the key of this forming method is:
1, when heating bottle blank is advanced in baking oven, when the heating-up temperature of bottle base arrives 116 ℃～120 ℃, one section cold wind blower is set in heating furnace reserves the handle section facing to bottle base, the cooling of drying, make the temperature of this section drop to 105 ℃～110 ℃ in the effect of cold wind, like this along with the reduction of this section temperature, the molecularly oriented motion of this section slows down relatively, reduced the draw ratio of this section, when it carries out pressure-air blowing in mould, this section stretching is slow closes, and so just easier subsides volt is the specific position of mould, unlikely blowing brokenly.
2, also improve at the non-regular shape that cooperates the handle position on the stretching bar, traditional stretching bar generally all has the high pressure pore in the bottom, during stretch blow, gas is along with the elongation of bottle, begin upwards distending from the bottom, make the well obedient volt of body on bottle pattern tool, moulding.But at bottle type, particularly body the vertical place of giving prominence to or caving in and is arranged, adopt this traditional stretch blow mode just to be difficult in this privileged sites, particularly corner's moulding with non-regular shape.At this situation, the present invention has done improvement on the stretching bar, promptly facing toward cooperation handle position on the body, the increase gas hole is assisted air blowing, like this along with the good draftability of heating bottle blank, and blow targetedly, just be easy to moulding, and guarantee that the same moulding in turning of privileged sites is good, deal with problems.
Be below adopt container bottle of the present invention the imperial fish edible oil bottle of stretch blow molding shaping method moulding 2.5L gold for example and the performance after the moulding:
Moulding material: PETG
The imperial fish edible oil bottle of shaped bottle type: 2.5L gold
Bottle blowing moulding machine: the SBO of SIDEL company series bottle blowing machine
Bottle base size: length 163.5mm
Weight 79g
Wall thickness 4.40mm
Base thickness 3.70mm
Product size:
Height 312mm
Capacity 2563ml
The out-of-shape cylinder, and the middle and upper part falls in, and leaves to cooperate the handle position
Thickness body part: 〉=0.30mm
1.91 times of draw ratios (axially)
The formed product condition:
Embodiment 1
Bottle base temperature: 116 ℃
Power of fan: 35kw
Pre-blowing pressure: 9.5kg/cm
2
Tenon control cylinder pressure: 9.5kg/cm
2
High pressure blow-gas pressure: 32kg/cm
2
The high pressure blow-gas duration: 0.90s
Moulding and cooperate handle after performance:
The perusal outward appearance: transparent, no bubble, no stain, no color differnece does not have white trace, not damaged, matched moulds is smooth, and the bottle inflation is full, and no buildup does not have distortion, without acceptance of persons.
Detection body wall thickness: 0.40mm (critical field: 〉=0.30mm)
Drop test: fill vertical 1.2 meters of water, fall 5 times, the bottle end, is not broken, and handle does not come off.(standard: behind plastic cement bottle dress 2.5L water, cover bottle cap, at the high vertical free fall in position of dried up mud ground face 120cm, not broken at the bottom of the secondary bottle, handle does not come off for qualified)
Detect compression strength: 30kg (standard: to erectting the empty bottle pressurization, the pressure 〉=24kg during bottle axial deformation 3mm is qualified with the test of compression strength instrument)
Detect vacuum: 110ml (standard: empty bottle is filled the water cover upper cover, draw water with syringe, until bottle tangible distortion is arranged, this moment, the reading of syringe was that vacuum 〉=90ml is qualified)
Embodiment 2
Bottle base temperature: 120 ℃
Power of fan: 36kw
Pre-blowing pressure: 10kg/cm
2
Tenon control cylinder pressure: 10kg/cm
2
High pressure blow-gas pressure: 33kg/cm
2
The high pressure blow-gas duration: 0.90s
Moulding and cooperate handle after performance:
The perusal outward appearance: transparent, no bubble, no stain, no color differnece does not have white trace, not damaged, matched moulds is smooth, and the bottle inflation is full, and no buildup does not have distortion, without acceptance of persons.
Detect body wall thickness: 0.39mm
Detection is fallen: fill vertical 1.2 meters of water, fall 5 times, the bottle end, is not broken, and handle does not come off.
Detect compression strength: 29kg
Detect vacuum: 105ml
Embodiment 3
Bottle base temperature: 120 ℃
Power of fan: 37kw
Pre-blowing pressure: 10.5kg/cm
2
Tenon control cylinder pressure: 10.5kg/cm
2
High pressure blow-gas pressure: 34kg/cm
2
The high pressure blow-gas duration: 0.90s
Moulding and cooperate handle after performance:
Naked eyes detect outward appearance: transparent, and no bubble, no stain, no color differnece does not have white trace, not damaged, matched moulds is smooth, and the bottle inflation is full, and no buildup does not have distortion, without acceptance of persons.
Detect body wall thickness: 0.35mm
Detection is fallen: fill vertical 1.2 meters of water, fall 5 times, the bottle end, is not broken, and handle does not come off.
Detect compression strength: 28kg
Detect vacuum: 100ml
Therefore, the stretch blow molding shaping method of container bottle of the present invention can be realized continuous bottle blowing, have the body of making and cooperate the handle position not blown brokenly, avoid the bad advantage of moulding, not only improved efficiency, the product quality that improves, and can reduce manpower, stopped original manually-operated danger.
Claims (9)
1. the stretch blow molding shaping method of container bottle, it is characterized in that: the molten resin bottle base is sent into the baking oven heating, heating process is to the cooling of drying of the reservation handle position section of bottle base, make this section of bottle base temperature be lower than the other parts temperature, heating bottle blank is sent in bottle pattern tool then and carried out the stretch blow moulding with the stretching bar.
2. the stretch blow molding shaping method of container bottle according to claim 1 is characterized in that: the cooperation handle position of bottle pattern tool, and adopt by two tenons of cylinder control and stretch out indentation.
3. the stretch blow molding shaping method of container bottle according to claim 1 and 2 is characterized in that: when stretching bar bottom is to the bottle base stretch blow, establishes gas hole on the stretching bar newly and assist air blowing at non-regular position and cooperation handle position.
4. the stretch blow molding shaping method of container bottle according to claim 1, it is characterized in that: described molten resin is a PETG, when bottle base is heated to 116 ℃～120 ℃, in heating process the reservation handle position section of bottle base is carried out the cold wind cooling, making this section temperature is 105 ℃～110 ℃.
5. the stretch blow molding shaping method of container bottle according to claim 4 is characterized in that: a described bottle bottle embryo keeps rotation in heating process.
6. the stretch blow molding shaping method of container bottle according to claim 5 is characterized in that: when stretching bar bottom is to the bottle base stretch blow, establishes gas hole on the stretching bar newly and assist air blowing at the cooperation handle position of container bottle.
7. the stretch blow molding shaping method of container bottle according to claim 6 is characterized in that: described heating bottle blank is sent into and is carried out stretch blow with the stretching bar in bottle pattern tool and be divided into stretching pre-blowing and high pressure blow-gas.
8. the stretch blow molding shaping method of container bottle according to claim 7, it is characterized in that: the pre-blowing pressure of described stretching pre-blowing is 9.5kg/cm
2～10.5kg/cm
2
9. the stretch blow molding shaping method of container bottle according to claim 7, it is characterized in that: the high pressure blow-gas pressure of described high pressure blow-gas is 32kg/cm
2～35kg/cm
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101193473A CN100560338C (en) | 2006-12-08 | 2006-12-08 | The stretch blow molding shaping method of container bottle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101193473A CN100560338C (en) | 2006-12-08 | 2006-12-08 | The stretch blow molding shaping method of container bottle |
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| CN101195271A true CN101195271A (en) | 2008-06-11 |
| CN100560338C CN100560338C (en) | 2009-11-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863309A (en) * | 2009-03-06 | 2010-10-20 | 克罗内斯股份公司 | Be used to make method and apparatus with filling thin-walled drink containers |
| CN102275296A (en) * | 2011-04-29 | 2011-12-14 | 广州达意隆包装机械股份有限公司 | Method for controlling temperature of heating head of bottle blowing machine |
| CN102529076A (en) * | 2010-12-01 | 2012-07-04 | 克朗斯股份有限公司 | Device for blow moulding containers |
| CN103372969A (en) * | 2012-04-19 | 2013-10-30 | 上海紫江企业集团股份有限公司 | Bottle blank |
-
2006
- 2006-12-08 CN CNB2006101193473A patent/CN100560338C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101863309A (en) * | 2009-03-06 | 2010-10-20 | 克罗内斯股份公司 | Be used to make method and apparatus with filling thin-walled drink containers |
| CN104309101A (en) * | 2009-03-06 | 2015-01-28 | 克罗内斯股份公司 | Method and device for manufacturing and filling thin-walled beverage containers |
| US9896318B2 (en) | 2009-03-06 | 2018-02-20 | Krones Aktiengesellschaft | Method and device for manufacturing and filling thin-walled beverage containers |
| CN102529076A (en) * | 2010-12-01 | 2012-07-04 | 克朗斯股份有限公司 | Device for blow moulding containers |
| CN102529076B (en) * | 2010-12-01 | 2014-07-23 | 克朗斯股份有限公司 | Device for blow moulding containers |
| CN102275296A (en) * | 2011-04-29 | 2011-12-14 | 广州达意隆包装机械股份有限公司 | Method for controlling temperature of heating head of bottle blowing machine |
| CN102275296B (en) * | 2011-04-29 | 2014-02-12 | 广州达意隆包装机械股份有限公司 | Method for controlling temperature of heating head of bottle blowing machine |
| CN103372969A (en) * | 2012-04-19 | 2013-10-30 | 上海紫江企业集团股份有限公司 | Bottle blank |
| CN103372969B (en) * | 2012-04-19 | 2015-10-28 | 上海紫江企业集团股份有限公司 | A kind of bottle base |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100560338C (en) | 2009-11-18 |
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