CN116968298A - PET bottle preform blow molding heating device and method - Google Patents
PET bottle preform blow molding heating device and method Download PDFInfo
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- CN116968298A CN116968298A CN202311222892.5A CN202311222892A CN116968298A CN 116968298 A CN116968298 A CN 116968298A CN 202311222892 A CN202311222892 A CN 202311222892A CN 116968298 A CN116968298 A CN 116968298A
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- blow molding
- cabin
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 58
- 238000000071 blow moulding Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 130
- 210000001161 mammalian embryo Anatomy 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000007664 blowing Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract description 4
- 239000012141 concentrate Substances 0.000 abstract description 2
- 239000000112 cooling gas Substances 0.000 description 30
- 238000009415 formwork Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000002257 embryonic structure Anatomy 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B29C49/48—Moulds
-
- 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
- B29C49/48—Moulds
- B29C49/4823—Moulds with incorporated heating or cooling means
-
- 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
- B29C49/48—Moulds
- B29C49/4823—Moulds with incorporated heating or cooling means
- B29C2049/4825—Moulds with incorporated heating or cooling means for cooling moulds or mould parts
-
- 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
- B29C49/48—Moulds
- B29C49/4823—Moulds with incorporated heating or cooling means
- B29C2049/4838—Moulds with incorporated heating or cooling means for heating moulds or mould parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
- B29L2031/7158—Bottles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
The invention relates to the field of blow molding processing equipment, in particular to a PET bottle embryo blow molding heating device and method. The invention provides a PET bottle embryo blow molding heating device, which comprises an installation underframe, a moving mechanism and the like; the installation chassis is connected with the moving mechanism. After the bottles are heated and blow-molded in the molds, the moving mechanism drives the right mold shell and the left mold shell to conduct the initial separation work, the local cooling mechanism firstly concentrates the preset structural area of the bottles to conduct cooling treatment, the cooling shaping speed of the connection part of the bottles and the preset structure is accelerated, the separation time of the two molds is later than the separation time of the right mold shell and the left mold shell under the electromagnetic attraction of the electromagnet, and the cooling demolding time of the bottles formed by blow molding between the right mold shell and the left mold shell is prolonged. Solves the technical problem that when the preset structure on the bottle blank is heavier, the bottle is not cooled and shaped in time after demoulding, and the structural consistency of the preset structure area of the produced bottle is damaged.
Description
Technical Field
The invention relates to the field of blow molding processing equipment, in particular to a PET bottle embryo blow molding heating device and method.
Background
In the blow molding process of the PET bottle embryo, the PET bottle embryo needs to be transferred into a mold, a heating module is arranged in the mold, the PET bottle embryo is maintained in a high-temperature state, a blow molding pipe is inserted into the PET bottle embryo, and after the PET bottle embryo is blow molded into a bottle which is suitable for the shape of the mold, the bottle can be directly removed from the mold and transferred into a next device for cooling treatment.
However, when a preset structure which does not need to be subjected to heating and blow molding is arranged on a bottle blank, as in a PET bottle blank disclosed in patent CN113199662A, the preset structure which does not need to be subjected to heating and blow molding in the bottle blank is clamped in a corresponding structure of a mold, the region outside the preset structure of the bottle blank is subjected to heating and blow molding, the preset structure of the bottle blank is kept independently, when the preset structure weight on the bottle blank is heavy, after the bottle blank is subjected to heating and blow molding to obtain a corresponding bottle, if the connection part between the bottle and the preset structure is not subjected to cooling and shaping treatment in time, the preset structure on the bottle is influenced by gravity after demolding, the initial structural shape of the connection part of the bottle and the preset structure is damaged, and the structural consistency of the preset structural region of the produced bottle is finally damaged.
The prior equipment is a local cooling mechanism for bottle embryo molding, such as the one described in patent CN104476758A, the water connection part of the bottle embryo is subjected to air blowing cooling treatment by the local cooling mechanism, but during the cooling process of the bottle embryo by using the method, cold air blown to other parts of the bottle embryo conflicts with hot air blowing treatment on other parts of the bottle embryo, so that the hot air blowing treatment effect of the other parts of the bottle embryo covered by the cold air is poor, and the structural consistency of the produced bottle is also damaged.
Disclosure of Invention
In order to overcome the defect that when the preset structure on the bottle blank is heavy, the bottle is not cooled and shaped in time after being demoulded, and the structural consistency of the preset structure area of the produced bottle is damaged, the invention provides a PET bottle blank blow molding heating device and a PET bottle blank blow molding heating method.
The technical scheme is as follows: a PET bottle preform blow molding heating device comprises an installation underframe, a moving mechanism, a right mould shell, a left mould shell, a mould, a first spring, an electromagnet, a heating block, a local cooling mechanism and a bottom cooling mechanism; the mounting underframe is connected with a moving mechanism; the right side of the moving mechanism is connected with a right mould shell; the left side of the moving mechanism is connected with a left mould shell; the opposite sides of the right mould shell and the left mould shell are respectively connected with a mould in a sliding way; two first springs are fixedly connected between the left mould and the left mould shell; two first springs are fixedly connected between the right mould and the right mould shell; two electromagnets are respectively arranged on the right mould shell and the left mould shell; the electromagnets on the right mould shell are initially clung to the adjacent electromagnets on the left mould shell; the opposite sides of the right mould shell and the left mould shell are respectively provided with a heating block; the heating parts of the two heating blocks are respectively connected with adjacent molds in a sliding way; a local cooling mechanism is connected between the upper sides of the right mould shell and the left mould shell; the bottom cooling mechanism is connected to the mounting underframe; the local cooling mechanism is connected with the bottom cooling mechanism.
In addition, it is particularly preferred that the local cooling mechanism comprises a cooling cabin, an air inlet pipe, an air exhaust pipe, an air outlet pipe, an air exhaust plug assembly and an air outlet plug assembly;
a cooling cabin is arranged on the upper side of the right mould shell; the left mould shell clings to the cooling cabin; the rear side of the cooling cabin is connected with an air inlet pipe; an exhaust pipe is communicated with the cooling cabin; an air extraction plug component is connected between the cooling cabin and the air extraction pipe; the air extraction plug component is connected with the left mould shell; an air outlet pipe is communicated with the cooling cabin; an air outlet plug assembly is connected between the cooling cabin and the air outlet pipe; the air outlet plug component is connected with the left mould shell.
Furthermore, it is particularly preferred that the cooling module is provided in a U-shaped configuration with bent ends.
Furthermore, it is particularly preferred that the suction plug assembly comprises a first push rod, a first piston and a second spring;
a first through hole structure aligned with the left end of the exhaust pipe is arranged on the cooling cabin; the exhaust pipe is connected with a first piston in a sliding way; a second spring is fixedly connected between the first piston and the exhaust pipe; the left mould shell is fixedly connected with a first push rod; the right end of the first push rod is clung to the first piston; the first piston is provided with an air suction hole structure, and the air suction hole is initially positioned in the cooling cabin.
Furthermore, it is particularly preferred that the outlet plug assembly comprises a second push rod, a second piston and a third spring;
a second through hole structure aligned with the left end of the air outlet pipe is arranged on the cooling cabin; the air outlet pipe is connected with a second piston in a sliding way; a third spring is fixedly connected between the second piston and the air outlet pipe; a second push rod is fixedly connected to the left mould shell; the right end of the second push rod is clung to the second piston; and the second piston is provided with an air outlet hole structure, and the air outlet hole is initially positioned in the air outlet pipe.
Furthermore, it is particularly preferred that the moving mechanism comprises a moving slide and an electric push rod;
two movable sliding blocks are connected to the mounting underframe in a sliding manner; the left mould shell is arranged on the left movable sliding block; a right mould shell is arranged on the right movable sliding block; two electric push rods are arranged on the mounting underframe; the telescopic ends of the two electric push rods are fixedly connected with adjacent movable sliding blocks respectively.
Furthermore, it is particularly preferred that the bottom cooling means comprises an annular compartment, an annular air cushion and a counterweight ring;
the middle part of the mounting underframe is provided with an annular cabin; an annular air cushion is fixedly connected in the annular cabin; the top of the annular air cushion is fixedly connected with a counterweight ring; the inner side of the annular air cushion is provided with a plurality of air injection hole structures; the lower side of the annular air cushion is connected with an air duct; the air outlet pipe is connected with the air guide pipe through a pipeline.
Furthermore, it is particularly preferred that the left and right sides of the counterweight ring are each fixedly connected with a double slider; the front side and the rear side of the right mould shell and the front side and the rear side of the left mould shell are respectively provided with a vertical chute structure which is adaptive to the double sliding blocks; a tension spring is fixedly connected between the two double sliding blocks and the annular cabin.
Furthermore, it is particularly preferred that the inner wall of the annular chamber is provided with a number of vent structures.
A PET bottle embryo blow molding heating method comprises the following steps:
step one: heating and blowing, namely firstly placing the bottle blank into a mold cavity for heating and blowing treatment to obtain a bottle with a required shape;
step two: locally cooling, and before demolding the bottle, intensively cooling and molding the joint of the bottle and the preset structure to form a firm connection structure between the bottle and the preset structure;
step three: demolding, namely demolding the bottle, wherein a firm connecting structure is formed between the bottle and a preset structure, and the preset structure of the bottle is not affected by gravity so that the structure is not damaged;
step four: and the whole cooling treatment is carried out, the whole bottle is rapidly cooled, and the whole cooling forming work of the bottle is quickened.
The beneficial effects are that: the invention describes a PET bottle embryo blow molding heating device, a moving mechanism drives a right mould shell and a left mould shell to finish closing or separating work, bottle embryos are heated and blow molded between two moulds in the right mould shell and the left mould shell to form bottles, electromagnets are respectively arranged on the right mould shell and the left mould shell, the moving mechanism drives the right mould shell and the left mould shell to carry out initial separating work, a local cooling mechanism firstly concentrates the preset structural area of the bottles to carry out cooling treatment, the cooling shaping speed of the connection part of the bottles and the preset structure is accelerated, under the electromagnetic attraction between the electromagnets which are mutually clung, the separating time of the two moulds is later than the separating time of the right mould shell and the left mould shell, the cooling demoulding time of the bottles blow molded between the right mould shell and the left mould shell is prolonged, and the whole bottle is gradually cooled under the cooling treatment effect of the local cooling mechanism;
the technical problem that when the preset structure on the bottle blank is heavy, the bottle is not cooled and shaped in time after being demoulded, and the structural consistency of the preset structure area of the produced bottle is damaged is solved.
Drawings
Fig. 1 is a perspective view schematically illustrating a first perspective structure according to an embodiment of the present invention;
fig. 2 is a schematic view of a perspective view of a second embodiment of the present invention;
FIG. 3 is a cross-sectional view of a right and left formwork depicting the present invention in accordance with an embodiment;
FIG. 4 is a cross-sectional view of a right formwork depicting an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a left formwork depicting an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a right form and mold according to an embodiment of the invention;
FIG. 7 is a cross-sectional view of a cooling module according to an embodiment of the invention;
FIG. 8 is a cross-sectional view of an outlet tube depicting the present invention according to an embodiment;
FIG. 9 is a cross-sectional view of an annular chamber depicting the present invention according to an embodiment;
fig. 10 is a schematic view illustrating a three-dimensional structure of a ring-shaped air cushion according to an embodiment of the present invention.
Reference numerals: 1-mounting underframe, 21-moving slide block, 22-electric push rod, 30-vertical slide groove, 31-right mould shell, 32-left mould shell, 33-mould, 34-first spring, 35-electromagnet, 4-heating block, 5-cooling cabin, 501-first through hole, 502-second through hole, 503-first push rod, 504-second push rod, 51-air inlet pipe, 52-air extraction pipe, 520-air extraction hole, 521-first piston, 522-second spring, 53-air outlet pipe, 530-air outlet hole, 531-second piston, 532-third spring, 6-annular cabin, 601-air discharge hole, 61-annular air cushion, 610-air injection hole, 611-air guide pipe, 62-counterweight ring, 63-double slide block, 64-tension spring.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
A PET bottle embryo blow molding heating method comprises the following steps:
step one: heating and blowing, namely firstly placing the bottle blank into a mold cavity for heating and blowing treatment to obtain a bottle with a required shape;
step two: locally cooling, and before demolding the bottle, intensively cooling and molding the joint of the bottle and the preset structure to form a firm connection structure between the bottle and the preset structure;
step three: demolding, namely demolding the bottle, wherein a firm connecting structure is formed between the bottle and a preset structure, and the preset structure of the bottle is not affected by gravity so that the structure is not damaged;
step four: and the whole cooling treatment is carried out, the whole bottle is rapidly cooled, and the whole cooling forming work of the bottle is quickened.
Example 1
The PET bottle embryo blow molding heating device comprises an installation underframe 1, a moving mechanism, a right mould shell 31, a left mould shell 32, a mould 33, a first spring 34, an electromagnet 35, a heating block 4, a local cooling mechanism and a bottom cooling mechanism, wherein the moving mechanism is arranged on the bottom of the installation underframe; the mounting underframe 1 is connected with a moving mechanism; the right side of the moving mechanism is connected with a right mould shell 31; the left side of the moving mechanism is connected with a left mould shell 32; the moving mechanism drives the right mould shell 31 and the left mould shell 32 to finish closing or separating work; the opposite sides of the right mould shell 31 and the left mould shell 32 are respectively connected with a mould 33 in a sliding way; the preform is blow-molded between two molds 33 to form a bottle; two first springs 34 are fixedly connected between the left mould 33 and the left mould shell 32; two first springs 34 are fixedly connected between the right mould 33 and the right mould shell 31; two electromagnets 35 are connected to the right and left die shells 31 and 32 through bolts; the electromagnet 35 on the right formwork 31 initially clings to the adjacent electromagnet 35 on the left formwork 32; the opposite sides of the right mould shell 31 and the left mould shell 32 are respectively connected with a heating block 4 through bolts; the heating parts of the two heating blocks 4 are respectively connected with adjacent dies 33 in a sliding way; when the moving mechanism drives the right mould shell 31 and the left mould shell 32 to separate, under the electromagnetic attraction between the mutually-clung electromagnets 35, the separation time of the two moulds 33 is later than the separation time of the right mould shell 31 and the left mould shell 32, and the cooling demoulding time of the bottle blow-molded between the right mould shell 31 and the left mould shell 32 is prolonged; a local cooling mechanism for cooling a preset structure which does not need to be heated is connected between the upper sides of the right mould shell 31 and the left mould shell 32; the bottom cooling mechanism is connected to the mounting underframe 1; the local cooling mechanism is connected with the bottom cooling mechanism.
As shown in fig. 4, 5 and 7, the local cooling mechanism comprises a cooling cabin 5, an air inlet pipe 51, an air exhaust pipe 52, an air outlet pipe 53, an air exhaust plug assembly and an air outlet plug assembly; a cooling cabin 5 is arranged on the upper side of the right mould shell 31; the left mould shell 32 is closely attached to the cooling cabin 5; the rear side of the cooling cabin 5 is connected with an air inlet pipe 51; an exhaust pipe 52 is connected to the cooling cabin 5; an air extraction plug assembly is connected between the cooling cabin 5 and the air extraction pipe 52; the air extraction plug assembly is connected with the left mould shell 32; an air outlet pipe 53 is communicated with the cooling cabin 5; an air outlet plug component is connected between the cooling cabin 5 and the air outlet pipe 53; the outlet plug assembly is connected to the left form 32; the cooling cabin 5 is arranged to be of a U-shaped structure with a bent end part, the preset structure which is not needed to be heated for the bottle is wrapped, and the cooling effect of the preset structure which is not needed to be heated for the bottle is improved.
As shown in fig. 7, the bleed piston assembly includes a first pushrod 503, a first piston 521, and a second spring 522; the cooling cabin 5 is provided with a first through hole 501 structure aligned with the left end of the exhaust pipe 52; a first piston 521 is slidably connected to the suction pipe 52; a second spring 522 is fixedly connected between the first piston 521 and the exhaust pipe 52; a first push rod 503 is fixedly connected to the left mould shell 32; the right end of the first pushrod 503 is abutted against the first piston 521; the first piston 521 is provided with an air suction hole 520 structure, and the air suction hole 520 is initially positioned in the cooling cabin 5; when the first pushrod 503 moves leftwards away from the second piston 531, the first piston 521 is pushed leftwards by the second spring 522, which is initially compressed, so that the suction hole 520 of the first piston 521 moves leftwards away from the cooling chamber 5, and the cooling gas in the cooling chamber 5 is no longer sucked outwards through the suction hole 520 through the suction pipe 52.
As shown in fig. 7 and 8, the outlet plug assembly includes a second pushrod 504, a second piston 531, and a third spring 532; a second through hole 502 structure aligned with the left end of the air outlet pipe 53 is arranged on the cooling cabin 5; the air outlet pipe 53 is connected with a second piston 531 in a sliding way; a third spring 532 is fixedly connected between the second piston 531 and the air outlet pipe 53; a second push rod 504 is fixedly connected to the left mould shell 32; the right end of the second push rod 504 is closely attached to the second piston 531; the second piston 531 is provided with an air outlet hole 530 structure, and the air outlet hole 530 is initially positioned in the air outlet pipe 53; when the second push rod 504 moves leftwards away from the second piston 531, the third spring 532, which is initially compressed, pushes the second piston 531 leftwards, so that the air outlet hole 530 of the second piston 531 enters the cooling compartment 5 leftwards, and cooling air in the cooling compartment 5 flows through the air outlet pipe 53 to enter the bottom cooling mechanism through the air outlet hole 530.
As shown in fig. 2, the moving mechanism comprises a moving slide 21 and an electric push rod 22; two movable sliders 21 are connected to the mounting underframe 1 in a sliding manner; the left movable sliding block 21 is connected with a left mould shell 32 through bolts; the right side movable slide block 21 is connected with a right mould shell 31 through bolts; two electric push rods 22 are connected to the mounting underframe 1 through bolts; the telescopic ends of the two electric push rods 22 are fixedly connected with adjacent movable sliding blocks 21 respectively; the two electric push rods 22 respectively drive the two movable sliding blocks 21 to move in opposite directions, and control the right mould shell 31 and the left mould shell 32 to finish closing or separating work.
The heating blow molding work of this PET bottle embryo blowing heating device:
the air intake pipe 51 is externally connected with cooling gas conveying equipment for conveying cooling gas to the cooling cabin 5, and the air exhaust pipe 52 is externally connected with cooling gas circulating and sucking equipment, and the externally connected cooling gas circulating and sucking equipment sucks and circularly conveys the cooling gas conveyed into the cooling cabin 5 to the externally connected cooling gas conveying equipment.
Firstly, two electric push rods 22 respectively drive two movable sliding blocks 21 to move in opposite directions, the two movable sliding blocks 21 respectively drive a right mould shell 31 and a left mould shell 32 to be away from each other, separation work of the right mould shell 31, the left mould shell 32 and two moulds 33 connected with the right mould shell 31 and the left mould shell 32 is completed, bottle blanks are clamped and transferred between the two moulds 33 by an external transfer mechanism, a preset structure of the bottle blanks is independently inserted into a cooling cabin 5, and in the process, two heating blocks 4 respectively perform heating treatment on the adjacent moulds 33.
Then, the two electric push rods 22 drive the two movable slide blocks 21 to move and reset respectively, the two movable slide blocks 21 drive the right mould shell 31 and the left mould shell 32 to approach each other, the closing work of the right mould shell 31, the left mould shell 32 and the two moulds 33 connected with the right mould shell 31 and the left mould shell is completed, the bottle blank is positioned between the two closed moulds 33, the heating block 4 keeps heating the two moulds 33, the bottle blank between the two moulds 33 is kept in a high-temperature state by the heat radiation of the moulds 33, then the bottle blank is inserted into the bottle blank by an external hot blowing pipe, the bottle blank is subjected to hot blowing treatment, and the bottle blank subjected to the hot blowing treatment forms a bottle with a specified shape between the two moulds 33, so that the heating blowing work of the bottle blank is completed.
The demolding work of the PET bottle embryo blow molding heating device comprises the following steps:
after the bottle blank is heated and blown to obtain a corresponding bottle, an external cooling gas conveying device conveys cooling gas into the cooling cabin 5 through the air inlet pipe 51, and meanwhile, an external cooling gas circulating and sucking device sucks and circularly conveys the cooling gas in the cooling cabin 5 into the external cooling gas conveying device through the air suction hole 520 of the air suction pipe 52, so that the cooling gas continuously flows in the cooling cabin 5, and preliminary cooling treatment is carried out on a preset structure of the bottle blank.
Simultaneously, the two electric push rods 22 respectively drive the two movable sliding blocks 21 to move in opposite directions, the two movable sliding blocks 21 respectively drive the right mould shell 31 and the left mould shell 32 to be away from each other, simultaneously, the two electromagnets 35 which are mutually clung generate electromagnetic attraction force to enable the two moulds 33 to be kept in a mutually clung state under the action of the electromagnetic attraction force, the right mould shell 31 and the left mould shell 32 respectively drive the first springs 34 connected with the two moulds to stretch, at the moment, the cooling cabin 5 intensively carries out cooling treatment on the preset structural area of the bottle, so that the cooling shaping speed of the joint of the bottle and the preset structure is accelerated, and the heating blocks 4 in the right mould shell 31 and the left mould shell 32 are respectively separated from the two moulds 33, the moulds 33 are not heated by the heating blocks 4, and the moulds 33 are gradually cooled due to the cooling influence of the cooling cabin 5, so that the whole cooling speed of the moulds 33 and the bottle is accelerated.
In the process that the left mould shell 32 and the right mould shell 31 are far away from each other, a first push rod 503 and a second push rod 504 in the left mould shell 32 are respectively pulled out from a first through hole 501 and a second through hole 502 of the cooling cabin 5, meanwhile, a second spring 522 and a third spring 532 which are in initial compressed states respectively push a first piston 521 and a second piston 531 to move leftwards, cooling gas in the cooling cabin 5 is not pumped outwards through a pumping hole 520 through a pumping pipe 52, the cooling gas in the cooling cabin 5 enters a bottom cooling mechanism through a gas outlet pipe 53, an electromagnet 35 is disconnected from electromagnetic attraction, two moulds 33 connected with the first spring 34 are respectively driven by the first spring 34 to return to the inside of the right mould shell 31 and the left mould shell 32, the heating blocks 4 in the right mould shell 31 and the left mould shell 32 heat the moulds 33 again, the separation time of the two moulds 33 is later than the separation time of the right mould shell 31 and the left mould shell 32, the cooling time of a bottle formed by blow molding between the right mould shell 31 and the left mould shell 32 is prolonged, and the connection part between the bottle and the preset structure can be firmly molded.
And finally, cooling gas in the cooling cabin 5 enters a bottom cooling mechanism, the whole demoulded bottle is rapidly cooled by the bottom cooling mechanism, the cooling speed of the bottle is accelerated, and then the bottle blank is clamped and transferred to a next processing device by an external transfer mechanism.
Example 2
As shown in fig. 1 to 10, on the basis of embodiment 1, the bottom cooling mechanism of this embodiment includes an annular chamber 6, an annular air cushion 61, a weight ring 62, a double slider 63, and a tension spring 64; the middle part of the mounting underframe 1 is connected with an annular cabin 6 through bolts; an annular air cushion 61 is fixedly connected inside the annular cabin 6; the top of the annular air cushion 61 is fixedly connected with a counterweight ring 62; the inner side of the annular air cushion 61 is provided with a plurality of air injection holes 610; the lower side of the annular air cushion 61 is connected with an air duct 611; the air outlet pipe 53 is communicated with an air guide pipe 611 through a pipeline; after the cooling gas in the cooling cabin 5 enters the annular air cushion 61 through the gas outlet pipe 53 and the gas guide pipe 611, the cooling gas rapidly props the annular air cushion 61 upwards to wrap the demoulded bottle, and blows out the bottle through the gas injection holes 610 on the annular air cushion 61 to cover the outer surface of the bottle, so that the bottle is cooled at the first time.
The left side and the right side of the counterweight ring 62 are welded with a double slide block 63 respectively; the front side and the rear side of the right mould shell 31 and the front side and the rear side of the left mould shell 32 are respectively provided with a vertical chute 30 structure which is matched with the double slide blocks 63; a tension spring 64 is fixedly connected between the two double slide blocks 63 and the annular cabin 6, cooling gas is not filled in the annular air cushion 61, and the stretched tension spring 64 is matched with the counterweight ring 62 to accelerate the downward retraction speed of the annular air cushion 61.
When the bottle is demolded from the two moulds 33, the left mould shell 32 and the right mould shell 31 are mutually far away, the double slide blocks 63 respectively cover the Ji Zuobu mould shell 32 and the vertical slide grooves 30 on the right mould shell 31, cooling gas in the cooling cabin 5 enters the annular air cushion 61 through the gas outlet pipe 53, the annular air cushion 61 is expanded and supported upwards by the cooling gas along with continuous filling of the cooling gas into the annular air cushion 61, the annular air cushion 61 pushes the counterweight ring 62 to drive the double slide blocks 63 to move upwards along the vertical slide grooves 30, the double slide blocks 63 drive the tension springs 64 to stretch upwards, the supported annular air cushion 61 wraps the bottle, and cooling air in the annular air cushion 61 is continuously sprayed on the outer surface of the bottle to perform rapid cooling treatment on the bottle.
And then the external cooling gas conveying equipment stops conveying cooling gas into the cooling cabin 5, the cooling gas does not enter the annular air cushion 61 any more, and after the annular air cushion 61 supported by the cooling gas loses the input of the cooling gas, the stretched tension spring 64 pulls the double slide blocks 63 to drive the counterweight ring 62 to quickly reset downwards, and the counterweight ring 62 drives the annular air cushion 61 to retract downwards into the annular cabin 6.
Example 3
As shown in fig. 1 to 10, on the basis of embodiment 2, the inner wall of the annular chamber 6 of this embodiment is provided with a plurality of air release holes 601, and the cooling air initially ejected from the air holes 610 of the annular air cushion 61 is discharged upward through the air release holes 601, so as to accelerate the initial cooling speed of the two molds 33.
Since the cooling gas in the cooling cabin 5 enters the annular air cushion 61 and a certain buffer time is needed to wait for the upward supporting process of the annular air cushion 61, during the period, part of the cooling gas sprayed from the air injection holes 610 of the annular air cushion 61 is directly discharged upward through the air release holes 601, the bottoms of the two dies 33 are directly cooled, the bottoms of the two dies 33 are cooled first, and the cooling cabin 5 cools the bottle blank from top to bottom through the connection part between the bottle blank and the preset structure in the earlier stage of the demolding operation of the PET bottle blank blow molding heating device, at this time, the cold air discharged upward from the air release holes 601 cools the bottle blank from bottom to top, which is beneficial to reducing the temperature difference between the upper side and the lower side of the bottle blank, and after the two dies 33 are separated from each other, the cooling gas pushes the annular air cushion 61 to be rapidly supported upward for complete cooling treatment of the bottle, and the cooling treatment time of the bottle is prolonged.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted equally without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. A PET bottle embryo blow molding heating device, which comprises: a mounting chassis (1);
the mounting underframe (1) is connected with a moving mechanism; the right side of the moving mechanism is connected with a right mould shell (31); the left side of the moving mechanism is connected with a left mould shell (32);
the method is characterized in that: also comprises a mould (33);
the opposite sides of the right mould shell (31) and the left mould shell (32) are respectively connected with a mould (33) in a sliding way; two first springs (34) are fixedly connected between the left mould (33) and the left mould shell (32); two first springs (34) are fixedly connected between the right mould (33) and the right mould shell (31); two electromagnets (35) are respectively arranged on the right mould shell (31) and the left mould shell (32); the electromagnet (35) on the right mould shell (31) is initially clung to the adjacent electromagnet (35) on the left mould shell (32); the opposite sides of the right mould shell (31) and the left mould shell (32) are respectively provided with a heating block (4); the heating parts of the two heating blocks (4) are respectively connected with adjacent moulds (33) in a sliding way; a local cooling mechanism is connected between the upper sides of the right mould shell (31) and the left mould shell (32); the bottom cooling mechanism is connected to the mounting underframe (1); the local cooling mechanism is connected with the bottom cooling mechanism.
2. A PET bottle preform blow molding heating apparatus as in claim 1 wherein: the local cooling mechanism comprises a cooling cabin (5);
a cooling cabin (5) is arranged on the upper side of the right mould shell (31); the left mould shell (32) is tightly attached to the cooling cabin (5); an air inlet pipe (51) is connected to the rear side of the cooling cabin (5); an exhaust pipe (52) is connected to the cooling cabin (5); an air extraction plug assembly is connected between the cooling cabin (5) and the air extraction pipe (52); the air extraction plug component is connected with the left mould shell (32); an air outlet pipe (53) is communicated with the cooling cabin (5); an air outlet plug assembly is connected between the cooling cabin (5) and the air outlet pipe (53); the outlet plug assembly is connected with the left mould shell (32).
3. A PET bottle preform blow molding heating apparatus as in claim 2 wherein: the cooling cabin (5) is of a U-shaped structure with a bent end part.
4. A PET bottle preform blow molding heating apparatus as in claim 2 wherein: the air extraction plug assembly comprises a first push rod (503);
a first through hole (501) structure aligned with the left end of the exhaust pipe (52) is arranged on the cooling cabin (5); a first piston (521) is connected in a sliding way to the exhaust pipe (52); a second spring (522) is fixedly connected between the first piston (521) and the exhaust pipe (52); a first push rod (503) is fixedly connected on the left mould shell (32); the right end of the first push rod (503) is clung to the first piston (521); the first piston (521) is provided with a suction hole (520) structure, and the suction hole (520) is initially positioned in the cooling cabin (5).
5. A PET bottle preform blow molding heating apparatus as in claim 4 wherein: the air outlet plug assembly comprises a second push rod (504);
a second through hole (502) structure aligned with the left end of the air outlet pipe (53) is arranged on the cooling cabin (5); the air outlet pipe (53) is connected with a second piston (531) in a sliding way; a third spring (532) is fixedly connected between the second piston (531) and the air outlet pipe (53); a second push rod (504) is fixedly connected on the left mould shell (32); the right end of the second push rod (504) is clung to the second piston (531); the second piston (531) is provided with an air outlet hole (530) structure, and the air outlet hole (530) is initially positioned in the air outlet pipe (53).
6. A PET bottle preform blow molding heating apparatus as in claim 1 wherein: the moving mechanism comprises a moving slide block (21);
two movable sliding blocks (21) are connected to the mounting underframe (1) in a sliding manner; a left mould shell (32) is arranged on the left movable sliding block (21); a right mould shell (31) is arranged on the right movable sliding block (21); two electric push rods (22) are arranged on the installation underframe (1); the telescopic ends of the two electric push rods (22) are fixedly connected with adjacent movable sliding blocks (21) respectively.
7. A PET bottle preform blow molding heating apparatus as in claim 5 wherein: the bottom cooling mechanism comprises an annular cabin (6);
an annular cabin (6) is arranged in the middle of the mounting underframe (1); an annular air cushion (61) is fixedly connected in the annular cabin (6); the top of the annular air cushion (61) is fixedly connected with a counterweight ring (62); the inner side of the annular air cushion (61) is provided with a plurality of air injection holes (610) structures; the lower side of the annular air cushion (61) is communicated with an air duct (611); the air outlet pipe (53) is communicated with the air guide pipe (611) through a pipeline.
8. A PET bottle preform blow molding heating apparatus as in claim 7 wherein: the left side and the right side of the counterweight ring (62) are fixedly connected with a double slide block (63) respectively; the front side and the rear side of the right mould shell (31) and the front side and the rear side of the left mould shell (32) are respectively provided with a vertical chute (30) structure which is matched with the double slide blocks (63); a tension spring (64) is fixedly connected between the two double sliding blocks (63) and the annular cabin (6).
9. A PET bottle preform blow molding heating apparatus as in claim 7 wherein: the inner wall of the annular cabin (6) is provided with a plurality of air leakage holes (601).
10. A method for heating a blow molding of a PET preform using the apparatus for heating a blow molding of a PET preform according to any one of claims 1 to 9, comprising the steps of:
step one: heating and blowing, namely firstly placing the bottle blank into a mold cavity for heating and blowing treatment to obtain a bottle with a required shape;
step two: locally cooling, and before demolding the bottle, intensively cooling and molding the joint of the bottle and the preset structure to form a firm connection structure between the bottle and the preset structure;
step three: demolding, namely demolding the bottle, wherein a firm connecting structure is formed between the bottle and a preset structure, and the preset structure of the bottle is not affected by gravity so that the structure is not damaged;
step four: and the whole cooling treatment is carried out, the whole bottle is rapidly cooled, and the whole cooling forming work of the bottle is quickened.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311222892.5A CN116968298B (en) | 2023-09-21 | 2023-09-21 | PET bottle preform blow molding heating device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311222892.5A CN116968298B (en) | 2023-09-21 | 2023-09-21 | PET bottle preform blow molding heating device and method |
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| CN116968298A true CN116968298A (en) | 2023-10-31 |
| CN116968298B CN116968298B (en) | 2024-01-16 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476758A (en) * | 2014-11-20 | 2015-04-01 | 中山汇伟塑胶工业有限公司 | Local cooling mechanism for preform molding |
| CN110605841A (en) * | 2018-06-14 | 2019-12-24 | 铨宝工业股份有限公司 | Blow molding machine suitable for manufacturing bottle body with handle and using method thereof |
| US20200047393A1 (en) * | 2018-08-12 | 2020-02-13 | Chumpower Machinery Corp. | Blow molding machine suitable for manufacturing a bottle having a handle and method for using the same |
| CN216804371U (en) * | 2022-02-24 | 2022-06-24 | 农夫山泉股份有限公司 | Cooling mold for bottle blowing |
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- 2023-09-21 CN CN202311222892.5A patent/CN116968298B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476758A (en) * | 2014-11-20 | 2015-04-01 | 中山汇伟塑胶工业有限公司 | Local cooling mechanism for preform molding |
| CN110605841A (en) * | 2018-06-14 | 2019-12-24 | 铨宝工业股份有限公司 | Blow molding machine suitable for manufacturing bottle body with handle and using method thereof |
| US20200047393A1 (en) * | 2018-08-12 | 2020-02-13 | Chumpower Machinery Corp. | Blow molding machine suitable for manufacturing a bottle having a handle and method for using the same |
| CN216804371U (en) * | 2022-02-24 | 2022-06-24 | 农夫山泉股份有限公司 | Cooling mold for bottle blowing |
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| CN116968298B (en) | 2024-01-16 |
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