CN1242290A - Blow molding apparatus and method of making the same - Google Patents
Blow molding apparatus and method of making the same Download PDFInfo
- Publication number
- CN1242290A CN1242290A CN99106673A CN99106673A CN1242290A CN 1242290 A CN1242290 A CN 1242290A CN 99106673 A CN99106673 A CN 99106673A CN 99106673 A CN99106673 A CN 99106673A CN 1242290 A CN1242290 A CN 1242290A
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- aforementioned
- conveyance
- neck
- blow molding
- preformed parison
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- 238000000071 blow moulding Methods 0.000 title claims abstract description 73
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 241000220317 Rosa Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/4205—Handling means, e.g. transfer, loading or discharging means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C2049/4294—Sealing means
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Provided are blow molding apparatus and blow molding method to facilitate insertion and removal of a molded item with respect to a conveying pin and surely establish an airtight seal of the molded item at the time of blow molding. A preform with a neck part and body part is supported by a conveying member and carried into a blow molding part. The blow molding part includes a split mold, an enclosing member which encloses the part when the split mold is closed, and a blow nozzle for introducing a blow fluid. The conveying member has a conveying pin, and a sealing flange part, which contacts an opening end surface of the part to airtightly seal it, is formed in the member. The enclosing member has a limiting member which, when the pin moves, contacts a member to be limited of the part to limit the movement of the preform and pin before the member contacts the flange part.
Description
The present invention relates to blow molding apparatus and blow molding method, particularly about guaranteeing the technology of preformed parison gas tightness sealing in the blow molding operation.
In the prior art, such as in the blow molding apparatus of container of shaping synthetic resin system etc., in the inner high pressure blow air that imports of the preformed parison that is formed in advance, as required, with extension rod carry out longitudinal axis extension, one side with preformed parison blow molding on one side.
When implementing this blow molding operation, must make that the inside of preformed parison is outside relatively to become the airtight sealing state, as poorly sealed, will produce gas leakage.
Here, the blow molding apparatus that the preformed parison that is shaped is in advance sent into blow molding portion with the downward handstand state of neck is general.Be the preformed parison of this handstand state of conveyance, on the conveyance member, designed the hollow tube-shape conveyance bar of flanged pin portion.Insert logical conveyance bar by the neck of preformed parison, the preformed parison is stood upside down to be supported on the flange part, and this structure is common to all.This conveyance bar, (マ Application De レ Le/mandrel) is showed to some extent as axle on U.S. patent the 5th, 340,302.
Structure about this United States Patent (USP) is illustrated with Fig. 5～7 that mark the symbol identical with use symbol among this United States Patent (USP) embodiment.Fig. 5 is identical with the 5th figure of above-mentioned United States Patent (USP), is the profile of blow molding portion.Fig. 6 is identical with the 3rd figure of above-mentioned United States Patent (USP), is the partial enlarged drawing of Fig. 5 under the state before blow nozzle 90 shown in Figure 5 rises.Fig. 7 is identical with the 6th figure of above-mentioned United States Patent (USP), is Fig. 5 partial enlarged drawing under the state after blow nozzle 90 shown in Figure 5 rises.Do not need its explanation of Therefore, omited because of the application though in Fig. 5～7, deposit the symbol that does not occur in the following description.
In Fig. 5, divide pattern 41,42 to be individually fixed on the matched moulds plate 43,44 with opening and closing.Holding device 60 has the axle 64 on main shaft portion 63 and its top, corresponds respectively to before blow nozzle 90 risings and after the rising, and is removable in primary position (position shown in Figure 6) and lifting position (position shown in Figure 7).
O shape ring element 68 is installed on the ditch 66 that is formed on the axle 64.This O shape ring element 68 is inserted on the preformed parison (parison/パ リ Application Application) 61 by axle 64 and is compressed, and has in conveyance, location and the process at matched moulds the effect that preformed parison 61 is remained on the axle 64.
Be provided with the detent mechanism 76,76 that formation keeps using flange at minute pattern 41,42.
Under the state before blow nozzle 90 rises, as shown in Figure 6, below detent mechanism 76 81 and and the opposite face 80 of its opposed axle 64 between formed the gap.
When blow nozzle 90 rose, as shown in Figure 7, main shaft member 63 rose with axle 64, and above-mentioned two sides 80,81 contacts.At this moment, the flange 75 of preformed parison 61 is near the maintenance flange 72 of detent mechanism 76.On Fig. 7, as can be seen, 72,75 contacts of two flanges; But in above-mentioned United States Patent (USP), then explanation has 0.008 inch gap (with reference to the 28th row～the 37 row of claim 6) therebetween.
In addition, with flange 72, the neck of preformed parison 61 has distortion to the flange part 75 by preformed parison 61 slightly, thereby has improved the sealing effectiveness (with reference to the 37th row～the 40 row of claim 6) of 0 shape ring element 68 near the maintenance of detent mechanism 76.
But the structure as according to above-mentioned United States Patent (USP) has produced following problems.
At first, the airtight sealing in the blow molding operation is to be realized with tight contact of the inwall of preformed parison 61 by O shape ring element 68.Owing to the existence of this indispensable O shape ring element 68, obviously, preformed parison 61 axle 64 vis-a-vis injects the change difficulty, and the container after will being shaped has also become difficulty from axle 64 disengagements.Particularly, seek to accelerate blow molding cycle, when boosting productivity, the required time of the plug of moulding product center roller 64 can not be ignored.
In addition, the O shape ring element 68 plug deteriorations repeatedly because of the formed products center roller increase as the replacing frequency of running stores, the maintenance work difficulty very that makes the management that comprises that it changes period.
Moreover if carry out blow molding under the state that O shape ring element 68 degenerates, it is bad to cause that not only blow air leakage current, generation are shaped, and because the outside leakage current of pressure-air, danger close becomes.
From the pressure-air that O shape ring element 68 spills, imported between the neck and detent mechanism of preformed parison 61 shown in Figure 7.At this moment, as between the maintenance of the flange 75 of preformed parison 61 shown in Figure 7 and detent mechanism 76 is with flange 72, have above-mentioned between the crack, preformed parison 61 is just pushed to by the leakage current pressure-air.Thus, the gap enlargement that open end of the neck of preformed parison 61 (preformed parison shown in Figure 7 61 lower surfaces) and the face that highlights from axle 64 levels are 80, the leakage current of pressure-air further strengthens.
The invention main points
Can guarantee the blow molding apparatus and the blow molding method of airtight sealing formed products when therefore, purpose of the present invention just is to be provided at blow molding.
Thereby another object of the present invention is not to provide by do not adorn expendable part that containment members such as O shape ring element make formed products plug, not need to be used for airtight sealing to conveyance easily with bar on bar in conveyance and safeguards and be easy to blow molding apparatus and blow molding method.
Even a further object of the present invention is to provide the heating process of the body portion that pair preformed parison is arranged before blow molding, also can prevent the distortion of heat affected areas in this heating process and the blow molding apparatus and the blow molding method of the air leakage current that causes.
Blow molding apparatus of the present invention has conveyance member, blowing cavity mould, surrounds member and blow nozzle, wherein, the conveyance member is used for supporting, conveyance preformed parison, and the preformed parison is provided with and has open end and neck that is limited member and the body portion that links to each other with this neck; The blowing cavity mould has to be opened/closed minute pattern, and will be container in the aforementioned preformed parison blow molding of aforementioned conveyance member upper support; Surrounding member is the aforementioned neck that is used for surrounding aforementioned preformed parison when pattern locking in aforementioned minute; Blow nozzle moves and by aforementioned conveyance member the blowing fluid is imported aforementioned preformed parison inside to aforementioned conveyance member after pattern locking in aforementioned minute; In such blow molding apparatus, it is characterized in that,
Aforementioned conveyance member includes: conveyance bar, conveyance member bodies.Wherein, conveyance imports in the aforementioned preformed parison with the aforementioned blowing fluid that bar is used for coming from aforementioned blow nozzle; The conveyance member bodies is to support the aforementioned conveyance bar that supports aforementioned preformed parison along aforementioned preformed parison with moving axially.
Aforementioned conveyance includes with bar: hollow shaft, sealing flange part.Wherein, hollow shaft inserts the neck of aforementioned preformed parison and imports aforementioned blowing fluid; Sealing contacts and this open end of airtight sealing with the aforementioned open end of aforementioned neck with flange.
Aforementioned encirclement member has limiting member, this limiting member is: when aforementioned conveyance with bar during along with aforementioned blow nozzle mobile and mobile, with before aforementioned sealing contacts with flange part, the member that is limited by the aforementioned neck of butt limits aforementioned preformed parison and aforementioned conveyance moving with bar at aforementioned encirclement member.
In addition, method of the present invention is the blow molding method of implementing applicable to blow molding apparatus of the present invention.
According to device and method of the present invention, by the locking that blowing cavity divides pattern, besieged member surrounds around the neck of preformed parison.Then move with blow nozzle, the conveyance of supporting preformed parison is moved with flange part with bar and sealing.Then, be formed on being limited member and being formed on the limiting member that surrounds on the member and connecting of preformed parison neck.Thus, limited its preformed parison and used moving of flange part with bar and sealing with its conveyance of supporting.Like this, the open end of preformed parison neck is close to the sealing flange part, forms airtight sealing.Therefore, when blow molding thereafter, can prevent really that the blowing fluid that imports preformed parison inside from draining to the outside.
When having formed this airtight sealing, conveyance is with the containment member that just need not adorn O shape ring etc. on the bar.Therefore, the action that conveyance is thrown off with bar from conveyance with the insert action of bar, with the container of blow molding of preformed parison can be implemented very sleekly.Moreover owing to there have not been the running stores of containment member, it is easy that maintenance work also becomes.
In device of the present invention, also have heater, be used for heating the aforementioned body portion of the aforementioned preformed parison that is bearing on the aforementioned conveyance member.
The aforementioned neck of aforementioned preformed parison has in the position of leaving from this neck and position, aforementioned tube portion boundary the aforementioned member that is limited is arranged;
The aforementioned limitations member of aforementioned encirclement member preferably is connected to little aforementioned being limited on the member of influence of the heat of being come by aforementioned heater.
Like this, owing to have being limited on the position that member is formed at the heat affecting that is difficult to be subjected to heater of preformed parison of restrictor function, even during with the limiting member butt, be limited to act on pressure on the member, also can reduce this and be limited the member undesired deformation, can guarantee its restrictor function.And owing to guaranteed to be limited the restrictor function of member, thus can guarantee by the neck opening end face with seal the airtight sealing that forms with flange part.
This is limited member can make the flange that is located at neck usually.
In device of the present invention, forming the 1st flange that is disposed near the position of aforementioned body portion, be positioned at than more forward the 2nd flange of stating the open end side of the 1st flange at the aforementioned neck of aforementioned preformed parison.
The aforementioned limitations member of aforementioned encirclement member, preferably aforementioned the 2nd flange of butt.
Like this, just can make than the 1st flange and be subjected to have restrictor function on the 2nd little flange of the heat affecting of heater.At this, forming under the situation of support ring and retaining ring on the neck of the container that is blow molded shaping, support ring is equivalent to the 1st flange; Retaining ring is equivalent to the 2nd flange.Thereby, in this case, existing flange can be utilized as limiter.
In apparatus of the present invention, when aforementioned limiting member is connected on aforementioned the 2nd flange, between aforementioned the 1st flange and aforementioned encirclement member, preferably maintain the gap from design size.
Come to decide design size like this, can guarantee the restrictor function of the 2nd flange reliably.
In apparatus of the present invention, between aforementioned conveyance inner face, preferably guarantee gapped from design size with the aforementioned quill shaft of bar and aforementioned neck.This structure with different as the structure of the illustrated United States Patent (USP) of prior art, are defined as energetically at the neck inner face and do not carry out airtight sealing.Therefore, formed products can slyness carry out with the Plug Action of bar conveyance.
Brief Description Of Drawings
Fig. 1 is the blow molding portion summary section that is suitable for blow molding apparatus of the present invention; Fig. 2 is that the supporting construction of the preformed parison before blow nozzle shown in Figure 1 is risen amplifies the amplification profile of expression; Fig. 3 is that the supporting construction of the preformed parison after blow nozzle shown in Figure 1 is risen amplifies the amplification profile of expression; Fig. 4 is the diagrammatic illustration figure that is located at the heating part on the blow molding apparatus shown in Figure 1; Fig. 5 is the summary section of the existing use-case of expression blow molding portion; Fig. 6 is the amplification profile of the supporting construction of preformed parison before the blow nozzle of presentation graphs 5 conventional examples rises; Fig. 7 is the amplification profile of the supporting construction of preformed parison after the blow nozzle of presentation graphs 5 conventional examples rises.
The invention most preferred embodiment
Bottom, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is the profile of the blow molding portion of blow molding apparatus of the present invention.In Fig. 1, in this blow molding portion, disposed the blowing cavity mould 100 that 100B constitutes by a pair of to be opened/closed minute pattern 100A.Fig. 1 shows preformed parison 102 and is positioned at a pair of minute pattern 100A, the mold closing state in the 100B.
Preformed parison 102 has neck 104 and coupled body portion 106.Open end 104A, threaded portion 104B, retaining ring 104C and support ring 104D on neck 104, have been formed.Support ring 104D is the 1st flange, and retaining ring 104C is the 2nd flange.
The 2nd quill shaft 112C inserts in the 1st cylindrical shell 114, from outstanding position, the lower end of the 1st cylindrical shell 114, has the C type ring element 112D that anti-avulsion is used.The 1st cylindrical shell 114 turns and can support slidably vertically conveyance bar 112.In addition, on the 1st cylindrical shell 114, fixing sprocket wheel 118.
The 1st cylindrical shell 114 is bearing in the inside of the 2nd cylindrical shell 116 free to rotately by bearing 119.The 2nd cylindrical shell 116 has the conveyance of being fixed on on the chain 120 and drive the cam-follower 126 that is driven sheet 122, rotates and contact with the track 124 with cam function of conveyance.1st, the 2nd cylindrical shell 114,116 has constituted the conveyance member bodies that can support conveyance usefulness bar 112 vertically with moving freely.
In this blow molding apparatus conveyance with chain 120 be set up in circulation conveyance member 110 by on the conveyance path, along the conveyance path with intermittently conveyances of conveyance member 110.This conveyance is surrounded by chain lead part 128 with chain 120.
In blow molding portion, below the stop position of conveyance member 110, disposing blowing core 130.This blowing core 130 is fixed on the board 200 by the blow molding portion fixed station 202 on the board 200 that is disposed at this blow molding apparatus.
This blowing core 130 has the blowing core body 132 that is fixed on the blow molding portion fixed station 202, the blow nozzle 134 of this body free lifting relatively.In blowing core body 132, dispose extension rod 135.This extension rod 135 is driven by not shown drive unit when blow molding, passes blow nozzle 134, conveyance with bar 112, extends driving preformed parison 102 along the longitudinal axis.On blowing core body 132, be connected with high pressure airline 136.In addition, connecting the 1st pipeline 138A, connecting the 2nd pipeline 138B at its downside at the upside of blow nozzle 134.
Fig. 1 shows to give among the 2nd pipeline 138B and imports air state, and blow nozzle 134 is positioned at and descends point most.On the other hand, import air by giving among the 1st pipeline 138A, blow nozzle 134 rises.Disposing sealing gasket 134A in the upper end of blow nozzle 134, by the rising of blow nozzle 134, sealing gasket 134A is close to the lower end of conveyance with bar 112, and blow nozzle 134 is connected with bar 112 with conveyance.Blow nozzle 134 rises again, can push away conveyance and move up with bar 112.
Bottom just makes the structure of airtight sealing of the inside of preformed parison 102 be illustrated by upwards pushed away conveyance by blow nozzle 134 with bar 112.
At first, as shown in Figure 1, with a pair of minute pattern 100A, the locking mobile phase interlock of 100B, as the encirclement member around the neck 104 that surrounds preformed parison 102 a pair of neck fairlead 140,140 is being set.This a pair of neck fairlead 140,140 also can directly be fixed to branch pattern 100A, on the 100B; Perhaps also can be upward represented as day flat 9-24540 of open patent, to being supported on branch pattern 100A horizontally slidingly, a pair of neck fairlead 140,140 on the 100B is to approaching mutually direction pushing by spring.Importantly at a minute pattern 100A, during the 100B locking, so long as a pair of neck guide member 140,140 be disposed at preformed parison 102 neck 104 around, just its supporting construction is not done specific requirement.
With reference to Fig. 2 and Fig. 3 this neck fairlead 140 is elaborated.
Fig. 2 shows the supporting construction of conveyance with the preceding preformed parison 102 of bar 112 risings; Fig. 3 shows the supporting construction of conveyance with bar 112 rising back preformed parisons 102.
As shown in Figure 2, be designed to before conveyance is risen with bar 112, the part of neck fairlead 140 inwalls contacts with the outer wall at arbitrary position of neck 104.The inwall contact part that is neck fairlead 140 can be threaded portion 104B, retaining ring 104C, with support ring 104D in part or all.Part by this neck fairlead 140 contacts with the part of neck 104 outer walls, at a minute pattern 100A, implements the centering to preformed parison 102 during the 100B locking, and in this sense, neck fairlead 140 has the guiding function of preformed parison 102.
On the inwall of neck fairlead 140, be provided with the outstanding limiting member 142 of inside side.Under state shown in Figure 2, this limiting member 142 is between the retaining ring 104C and support ring 104D of neck 104.And at this moment, the sealing with flange part 112A above and neck fairlead 140 below between guarantee that enough gaps are arranged.
As from position shown in Figure 2, conveyance is risen with bar 112, just become appearance shown in Figure 3.As shown in Figure 3, preformed parison 102 also rises with the rising of bar 112 integratedly with conveyance.At this moment, the retaining ring 104C that is formed on the neck 104 of preformed parison 102 contacts with each limiting member 142 of a pair of neck fairlead 140, and in this position, preformed parison 102 stops rising with conveyance with bar 112.Because this retaining ring 104C contacts with limiting member 142, not sealing top can the contact of flange part 112A with the following of neck fairlead 140.
At this moment, the neck 104 of preformed parison 102, other conveyance was up being pushed by blow nozzle 134 with bar 112 when its rising was limited by limiting member 142.The result is, the open end 104A of neck 104 is close to conveyance with the integrally formed sealing of bar 112 with on the flange part 112A.Because this open end 104A fits tightly with flange part 112A with sealing, has formed airtight sealing herein.Thereby, thereafter, even to the preformed parison 102 inner high pressure blow air that import, also can prevent that this pressure-air from leaking into the outside of preformed parison 102 with bar 112 by blowing core 130, conveyance.And owing to limited preformed parison 102 moving upward by limiting member 142, in whole blow molding process, the open end 104A of neck 104 can not be disengaged with the state that fits tightly between the flange part 112A with sealing.
For improving its sealing, also can synthetic resin members such as type ring be set on flange part 112A in the sealing that open end 104A fitted tightly of above-mentioned neck 104.
Under state shown in Figure 3, the support ring 104D of neck 104 and branch pattern 100A between the 100B, preferably guarantee gapped from design size.Like this, can be on support ring 104D actuating pressure not, prevent its distortion.
Here, contact with limiting member 142 about making retaining ring 104C, and make the reason of not bearing excessive pressure on the support ring 104D, also can be illustrated with reference to Fig. 4.
Illustrated among Fig. 4,, disposed the heating part at the conveyance direction leading portion of conveyance member 110 to blow molding portion shown in Figure 1.In Fig. 4, on this heating part, on a side in the conveyance path of clamping preformed parison 102, disposed heating source, as 5 infrared heater 150A～150E; Disposing speculum 152 its other side.In addition, in this heating part, disposed revolution drive chain 156, be meshed with the sprocket wheel 118 of conveyance member 110.Thereby the driving force of this revolution drive chain 156 is delivered to conveyance with bar 112 by sprocket wheel 118, can make 102 rotations of preformed parison.
Each height and position of the tube portion 106 of infrared heater 150A～150E and preformed parison 102 is relatively disposing, so that the body portion 106 of preformed parison 102 is heated to the preference temperature of blow molding.Particularly, because the zone nearby of the neck 104 in the body portion 106 of preformed parison 102 needs to extend especially easily, the infrared heater 150E of hypomere is configured on the position close with neck 102.
Opposite with this structure, neck 104 does not need to be extended and from preventing the viewpoint of thermal deformation, must be by heat insulation, and therefore, as shown in Figure 4, be provided with in the heating part and be used for the reflecting plate 154 heat insulation neck 104.
Even in this wise neck 104 is carried out heat insulationly, hide heat fully near the support ring 104D of the position intersection that is in 106 in neck 104 and tube portion, also be impossible physically.Therefore, support ring 104D possesses heat to a certain degree when blow molding then, this point, and when preformed parison 102 was in the heating part, retaining ring 104C, and was in and is supported the position that ring 104D etc. hides heat further from thermal source than support ring 104D.
By above-mentioned reason, retaining ring 104C lacks than the heat that support ring 104D possesses when the blow molding, is difficult to produce distortion.
Therefore, as mentioned above, the preferably retaining ring 104C that contacts with limiting member 142, and preferably support ring 104D with divide pattern 100A, 100B does not contact, thereby does not produce the distortion of not expecting.
The invention is not restricted to the foregoing description, in main idea scope of the present invention, can do all distortion and implement.
As, in the present invention, as the member that is limited that contacts with limiting member with restrictor function, be not limited to retaining ring in neck formation, so long as the shape that can connect with limiting member can, implement before blow molding under the situation of heating process, it is limited member and preferably is formed at position away from body portion.
Claims (10)
1. blow molding apparatus, it has conveyance member, blowing cavity mould, surrounds member, blow nozzle, wherein: the conveyance member is used for supporting, conveyance preformed parison, the body portion that this preformed parison has and has open end and the neck that is limited member, links to each other with this neck; The blowing cavity mould has to be opened/closed minute pattern, and the aforementioned preformed parison blow molding that will be supported on the aforementioned conveyance member is a container; Surrounding member is when pattern locking in aforementioned minute, surrounds the aforementioned neck of aforementioned preformed parison; Blow nozzle is to move to aforementioned conveyance member after pattern locking in aforementioned minute, and imports the blowing fluid by aforementioned conveyance member to aforementioned preformed parison inside; In above-mentioned such blow molding apparatus, it is characterized in that,
Aforementioned conveyance member includes conveyance bar and conveyance member bodies, and wherein, conveyance is used for the aforementioned blowing fluid from aforementioned blow nozzle is imported aforementioned preformed parison inside with bar; The conveyance member bodies can support the aforementioned conveyance bar that supports aforementioned preformed parison along aforementioned preformed parison with moving axially;
Aforementioned conveyance includes hollow shaft, seals and use flange part with bar, and wherein, hollow shaft inserts the aforementioned neck of aforementioned preformed parison and imports aforementioned blowing fluid; Sealing hermetic seals this open end with flange part by contacting with the aforementioned open end of aforementioned neck;
Aforementioned encirclement member has limiting member, this limiting member aforementioned conveyance move along with aforementioned blow nozzle with bar and when mobile and at aforementioned encirclement member with before aforementioned sealing contacts with flange part, offset and fetch mobile with bar of the aforementioned preformed parison of restriction and aforementioned conveyance by being limited member with aforementioned neck aforementioned.
2. the blow molding apparatus of recording and narrating as claim 1 is characterized in that, it also has heater, is used for heating the aforementioned body portion of the aforementioned preformed parison that is bearing on the aforementioned conveyance member;
The aforementioned neck of aforementioned preformed parison has the aforementioned member that is limited in the position, boundary of leaving this neck and aforementioned tube portion;
The aforementioned limitations member of aforementioned encirclement member is connected to few aforementioned being limited on the member of heat affecting that is subjected to come from aforementioned heater.
3. by claim 1 or 2 blow molding apparatus of being recorded and narrated, it is characterized in that the aforementioned member that is limited is the flange on neck before being located at.
4. the blow molding apparatus of recording and narrating as claim 2 is characterized in that, is forming the 1st flange that is disposed near the position of aforementioned body portion on the aforementioned neck of aforementioned preformed parison, is positioned at than aforementioned the 1st flange also near the 2nd flange of aforementioned open end side;
The aforementioned limitations member of aforementioned encirclement member and aforementioned the 2nd flange carry out butt.
5. the blow molding apparatus of recording and narrating by claim 4 is characterized in that, when aforementioned limiting member is connected on the 2nd flange, between aforementioned the 1st flange and aforementioned encirclement member, guarantees gapped from design size.
6. by each blow molding apparatus of recording and narrating in the claim 1～5, it is characterized in that, between aforementioned conveyance inner face, guarantee gapped from design size with the aforementioned hollow shaft of bar and aforementioned neck.
7. a blow molding method is characterized in that,
It includes and moves into operation, locking operation, surrounds operation, mobile process, sealing process and blow molding operation, wherein moving into operation is: the preformed parison with body portion that open end and the neck that is limited member link to each other with neck therewith will be arranged, supported and moved into blow molding portion by the conveyance member, (this conveyance member by body with have the conveyance that relative this body movably seals with flange part and constituted) with bar;
The locking operation is that the blowing cavity that will be disposed at aforementioned blow molding portion divides the pattern locking;
Surrounding operation is when the aforementioned blowing cavity of locking divides pattern, by surround member surround aforementioned neck around;
Mobile process is that blow nozzle is moved to aforementioned conveyance member;
Sealing process is to be accompanied by moving of aforementioned blow nozzle, and moved with bar above-mentioned body relative to conveyance member the conveyance of the flange part of aforementioned body sealing usefulness aforementioned having, thereby hermetic seals the aforementioned open end of aforementioned preformed parison;
The blow molding operation is after aforementioned sealing process, will import aforementioned preformed parison inside by aforementioned conveyance member from the blowing fluid that aforementioned blow nozzle comes, and is container with the blow molding of aforementioned preformed parison;
In aforementioned airtight sealing operation, when aforementioned conveyance with bar during along with aforementioned blow nozzle mobile and mobile, with ining addition the limiting member that on aforementioned encirclement member, forms be connected to aforementioned neck aforementioned be limited member and limit aforementioned preformed parison and aforementioned conveyance with the mobile operation of bar; Thus, aforementioned sealing fits tightly, has realized airtight sealing with the aforementioned open end of flange part and aforementioned neck.
8. the blow molding method of recording and narrating as claim 7 is characterized in that, it also has heating process, and before aforementioned preformed parison being moved into aforementioned blow molding portion, heating is supported on the aforementioned body portion of aforementioned preformed parison on the aforementioned conveyance member in this operation;
In aforementioned airtight sealing operation, the aforementioned limitations member of aforementioned encirclement member is connected to aforementioned being limited on the member, this be limited member be formed at the aforementioned neck of aforementioned preformed parison and position, aforementioned body portion boundary from the position on and be subjected to the heat affecting of aforementioned heating process little.
9. the blow molding method of recording and narrating by claim 8, it is characterized in that, on the aforementioned neck of aforementioned preformed parison, be provided with and be disposed near locational the 1st flange of aforementioned cylindrical shell, be positioned at the 2nd flange than the more close aforementioned open end side of aforementioned the 1st flange;
In aforementioned airtight sealing operation, the aforementioned limitations member of aforementioned encirclement member and aforementioned the 2nd flange carry out butt.
10. the blow molding method of recording and narrating by claim 9, it is characterized in that, in aforementioned airtight sealing operation, when the aforementioned limitations member is connected on aforementioned the 2nd flange, guarantee between aforementioned the 1st flange and aforementioned encirclement member gapped from design size.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP155293/1998 | 1998-05-20 | ||
| JP15529398A JP3588549B2 (en) | 1998-05-20 | 1998-05-20 | Blow molding apparatus and blow molding method |
| JP155293/98 | 1998-05-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1242290A true CN1242290A (en) | 2000-01-26 |
| CN1147392C CN1147392C (en) | 2004-04-28 |
Family
ID=15602737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991066731A Expired - Lifetime CN1147392C (en) | 1998-05-20 | 1999-05-20 | Blow molding apparatus and method of making the same |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3588549B2 (en) |
| KR (1) | KR100582337B1 (en) |
| CN (1) | CN1147392C (en) |
| TW (1) | TW504450B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101827699B (en) * | 2007-09-27 | 2013-01-16 | 西德尔公司 | Equipment for blowing vessels of a thermoplastic material |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1311733B1 (en) * | 1999-12-23 | 2002-03-19 | Sipa Spa | IMPROVED PLANT FOR INFRARED HEATING OF PLASTIC PREFORMS |
| DE202007002873U1 (en) * | 2007-02-27 | 2007-04-26 | Krones Ag | Blow mold for producing plastic containers comprises a ring that supports the neck of the container and has a spacer to prevent the body of the container from contacting the inner wall of the mold if the container is tilted |
| KR100826844B1 (en) * | 2008-01-11 | 2008-05-06 | 노윤호 | Injection stretching blow molding assembly for non-round shape case |
| DE102008036103A1 (en) * | 2008-08-04 | 2010-02-11 | Krones Ag | Device for expanding containers |
| JP5284751B2 (en) * | 2008-10-21 | 2013-09-11 | 株式会社フロンティア | Blow molding preform carrier and blow mold |
| MX359208B (en) * | 2012-08-09 | 2018-09-19 | Nissei Asb Machine Co Ltd | Blow nozzle and blow molding machine. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4382760A (en) * | 1981-04-24 | 1983-05-10 | Cincinnati Milacron Inc. | Apparatus for high rate production of biaxially oriented thermoplastic articles |
| JP3336477B2 (en) * | 1994-04-28 | 2002-10-21 | 株式会社吉野工業所 | Preform holding jig |
| CH690002A5 (en) * | 1995-10-10 | 2000-03-15 | Tetra Pak Plastics Ltd Tetra P | Machine for the production of plastic container. |
-
1998
- 1998-05-20 JP JP15529398A patent/JP3588549B2/en not_active Expired - Lifetime
-
1999
- 1999-04-29 TW TW088106964A patent/TW504450B/en active
- 1999-05-20 CN CNB991066731A patent/CN1147392C/en not_active Expired - Lifetime
- 1999-05-20 KR KR1019990018211A patent/KR100582337B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101827699B (en) * | 2007-09-27 | 2013-01-16 | 西德尔公司 | Equipment for blowing vessels of a thermoplastic material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11320665A (en) | 1999-11-24 |
| KR100582337B1 (en) | 2006-05-23 |
| JP3588549B2 (en) | 2004-11-10 |
| CN1147392C (en) | 2004-04-28 |
| KR19990088433A (en) | 1999-12-27 |
| TW504450B (en) | 2002-10-01 |
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20040428 |