WO2014175311A1 - パリソン供給装置及び供給方法 - Google Patents
パリソン供給装置及び供給方法 Download PDFInfo
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- WO2014175311A1 WO2014175311A1 PCT/JP2014/061374 JP2014061374W WO2014175311A1 WO 2014175311 A1 WO2014175311 A1 WO 2014175311A1 JP 2014061374 W JP2014061374 W JP 2014061374W WO 2014175311 A1 WO2014175311 A1 WO 2014175311A1
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- parison
- tension
- chuck
- extrusion die
- chucks
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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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
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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
- B29C49/28—Blow-moulding apparatus
- B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
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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
- B29C49/006—Blow-moulding plants, e.g. using several blow-moulding apparatuses cooperating
- B29C49/0062—Blow-moulding plants, e.g. using several blow-moulding apparatuses cooperating using two or more parallel stations, e.g. two parallel heating or blowing stations
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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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/0208—Combined blow-moulding and manufacture of the preform or the parison joining several separate preforms while blow-moulding, e.g. two cylindrical preforms welded together during blowing
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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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
- B29C49/04102—Extrusion blow-moulding extruding the material continuously
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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
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
- B29C49/04118—Means for supporting the extruded parison
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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
- B29C49/42051—Means for stripping, aligning or de-stacking
- B29C49/42061—Means for correcting, aligning or straighten preforms, e.g. gripper with correcting means
- B29C49/42063—Means for correcting, aligning or straighten preforms, e.g. gripper with correcting means in relation to the mould, e.g. preform centring means in the mould
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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
- B29C49/42073—Grippers
- B29C49/42075—Grippers with pivoting clamps
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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
- B29C49/42073—Grippers
- B29C49/42085—Grippers holding inside the neck
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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
- B29C49/42093—Transporting apparatus, e.g. slides, wheels or conveyors
- B29C49/42107—Transporting apparatus, e.g. slides, wheels or conveyors with accumulator or temporary storage, e.g. while waiting for the blowing apparatus
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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
- B29C49/42093—Transporting apparatus, e.g. slides, wheels or conveyors
- B29C49/42111—Transporting apparatus, e.g. slides, wheels or conveyors with changeable transporting paths or lengths
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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
- B29C49/42113—Means for manipulating the objects' position or orientation
- B29C49/42119—Rotation, e.g. rotating a predetermined angle for asymmetric preform or with asymmetric heat profile
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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
- B29C49/42113—Means for manipulating the objects' position or orientation
- B29C49/42121—Changing the center-center distance
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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
- B29C49/4242—Means for deforming the parison prior to the blowing operation
- B29C49/4244—Means for deforming the parison prior to the blowing operation during or after laying preform into the final mould
- B29C49/42454—The mould opening plane being vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/253—Preform
- B29K2105/258—Tubular
Definitions
- the present invention relates to a parison supply device and a parison supply method for supplying a parison discharged from an extrusion die in blow molding to a blow mold.
- extrusion blow molding direct blow molding
- a thermoplastic resin is melted by an extrusion molding machine, and the molten resin is discharged from an extrusion die (die head) to form a hollow pipe parison, and the parison is formed by a pair of blow molding dies. And blow air into the parison to form a hollow body.
- the parison in the state discharged from the extrusion die is not restrained at the tip in the as-is state, there is a concern that the axis deviation and the thickness fluctuation may occur due to rolling.
- the parison that is extruded vertically downward has a difference in thickness between the top and the bottom due to the phenomenon in which the parison itself is drawn by its own weight (drawdown) or the phenomenon in which the diameter of the parison swells after ejection from the extrusion die (diewell) Is a problem.
- a parison extruded from an extrusion nozzle is captured by one capture means, and the capture means is lowered at a speed faster than the extrusion speed of the parison to pull the parison, and the extrusion is carried out in this stretched state.
- the parison is drawn into the mold located below the nozzle and another capture means is shown to capture the parison above the mold before the part of the parison pinched by the mold is separated from the parison body There is.
- the pair of clamping means simultaneously sandwiches the parison and then the spacing between the clamping means is made to be apart from each other to stretch the parison. It is difficult to stretch with a thickness close to uniform, and the thickness near the center of the parison tends to be thinner than the thickness near both ends.
- a pair of clamping means simultaneously clamps the parison, and in order to supply the parison continuously, the pair of clamping means are separated before one parison is separated. It is necessary to hold the parison already. For this reason, at least one separation interval of supply space is required between the discharge port of the extrusion die and the separation area of the parison.
- Patent Document 2 captures the extruded parison by one capture means and lowers the capture means to pull the parison into the mold so that the parison portion held by the mold is the parison. Since another capture means captures the parison above the mold prior to being separated from the body, as compared to when a pair of capture means capture the parison simultaneously as described in US Pat. Supply space can be shortened. However, since the two capture means capture the parison in a fixed position and the mold replacement is performed in the direction orthogonal to the parison extrusion direction, the parison must be supplied intermittently.
- Patent Document 2 Although it is possible to always restrain the parison discharged from the extrusion die, it is always appropriate because the mold 6 (5) and the capture jaw 12 (11) are simultaneously closed. It is not possible to continuously supply a parison while maintaining a proper tension state (see FIG. 2 of Patent Document 2).
- the present invention takes, as an example, a task to cope with such a situation. That is, the parison discharged from the extrusion die at a predetermined extrusion rate is continuously supplied to the blow mold, and is supplied to a plurality of blow molds in order to improve the quality of the continuously formed molded body. It is an object of the present invention to keep the state of the parison properly, to be able to realize the supply of a good quality parison by keeping the parison discharged from the extrusion die in an appropriate tension state while constantly restraining the parison.
- the present invention at least comprises the following configuration.
- a parison supply apparatus for continuously supplying a parison portion having a predetermined length from a parison discharged from an extrusion die to a blow mold, wherein a plurality of tension chucks which grip the parison and pull in the discharge direction of the parison between the extrusion die And a tension chuck operation unit for operating the plurality of tension chucks, wherein the tension chuck operation unit causes each of the tension chucks to hold a parison at a first position close to the extrusion die to separate it from the extrusion die Repeated movement to the second position, and before the leading tension chuck is separated from the extrusion die at the second position by the set distance, the trailing tension chuck follows the parison at the first position. After holding, the parison is supplied to the blow mold.
- a parison supply method for continuously supplying a parison portion having a predetermined length from a parison discharged from an extrusion die to a blow molding mold comprising a plurality of tension chucks that hold the parison and pull it in the discharge direction of the parison with the extrusion die. And each of the tension chucks performs a repetitive operation in which the parison is gripped at a first position close to the extrusion die and moved to a second position spaced apart from the extrusion die, and the preceding tension chuck is at the second position The subsequent tension chuck grips a parison at the first position before separating from the extrusion die by a set distance, and then the parison is supplied to the blow mold.
- the parison discharged from the extrusion die at a predetermined extrusion rate can be continuously supplied to the blow mold, and the state of the parison supplied to a plurality of blow molds.
- Supplying a high-quality parison can be realized by keeping the parison discharged from the extrusion die constantly restrained while maintaining an appropriate tension.
- a parison supply device 1 is a device for continuously supplying a parison portion Ps having a predetermined length from a parison P discharged from an extrusion die 10 to a blow molding die (not shown), and includes a plurality of tension chucks 2 and tension chucks.
- the operation unit 3 is provided.
- two tensile chucks 2A and 2B are provided as the tensile chuck 2 is described.
- three or more tensile chucks 2 may be provided in one parison supply device 1.
- the tension chucks 2A and 2B hold the parison P and apply tension to the extrusion die 10.
- the tension direction of the tension chucks 2A and 2B coincides with the discharge direction of the parison P.
- the tensile chucks 2A and 2B apply a tensile force to the parison P by lowering while holding the parison P.
- the operation timing at which the tension chucks 2A and 2B grip the parison P may be simultaneous with or after the start of movement of the tension chucks 2A and 2B in the discharge direction.
- the parison P can be pulled from the extrusion die 10 by increasing the moving speed (relative moving speed with respect to the extrusion die 10) in the parison P discharge direction of the tension chucks 2A and 2B relative to the parison P discharge speed. it can.
- the moving speed of the tension chucks 2A and 2B in the discharge direction may be gradually increased or gradually changed, but more preferably, the parison P is made constant by making the moving speed constant. To an appropriate tension rate.
- the moving speeds of the tension chucks 2A and 2B are made constant, the moving speed may be gradually increased or decreased at the start of movement and at the end of movement in order to make the operation smooth.
- the tension chuck operation unit 3 for operating the tension chucks 2 continues the tension state of the parison P discharged from the extrusion die 10 by repeatedly operating the respective tension chucks 2A and 2B in a predetermined cycle.
- each tension chuck 2A, 2B holds the parison P at a first position (I) close to the extrusion die 10 and moves to a second position (II) separated from the extrusion die 10 Repeat operation.
- the set distance L is the longest distance that the tensile chucks 2A and 2B can be separated from the opening end of the extrusion die 10 in the parison discharge direction as a definition
- the set distance L of this embodiment is shown in the figure.
- the distance from the open end of the extrusion die 10 to the second position (II) is obtained.
- the movement of the tension chucks 2A and 2B in the discharge direction is an operation of restraining the parison P and applying tension, but the movement in the direction opposite to the discharge direction of the tension chucks 2A and 2B (upward in the figure) is the motion of the parison P It is a return operation for releasing the restraint and preparing for the next pulling operation.
- the moving speed in the return operation of the tension chucks 2A and 2B can be set to a necessary speed in accordance with the timing of the next pulling operation regardless of the moving speed in the discharge direction (tension direction). When many (three or more) tension chucks 2 are provided, the moving speed of each return operation can be reduced compared to the case where two tension chucks 2 are provided.
- the tension chuck operation unit 3 sets operation timings of the preceding tension chuck 2A (2B) and the subsequent tension chuck 2B (2A).
- preceding means first applying tension to parison P
- following means applying tension to parison P thereafter.
- the subsequent tension chuck 2B is at the first position before the leading tension chuck 2A is separated from the extrusion die 10 by the set distance L at the second position (II).
- the parison P is gripped by (I).
- FIGS. 1A and 1B show the change in the discharge state of the parison P and the operation of the tension chucks 2A and 2B in time series.
- the tension chuck 2A moves in the tension direction (discharge direction) while gripping the parison P, and the tension chuck 2B causes the parison P to grip in the return direction opposite to that. It is moving without.
- the parison P is held together by the pair of tension chucks 2A and 2B, and is not shown between the pair of tension chucks 2A and 2B.
- a parison portion Ps to be supplied to the blow mold is formed.
- the tension chuck 2B moves in the tension direction first.
- the tension chuck 2A moves in the return direction via the second position (II).
- FIG. 2 shows the operation curves of the tension chucks 2A and 2B shown in FIG. 1, where the horizontal axis represents time T, the vertical axis represents the distance Z from the extrusion die 10, the broken line represents the operation curve of the tension chuck 2A, and the broken line A broken line indicates an operation curve of the tension chuck 2B.
- the states of times [1] to [5] in FIG. 2 correspond to the states of (a) to (e) of FIG.
- the tension chucks 2A and 2B move at a constant speed in the tension direction, and the tension chucks 2A and 2B increase the moving speed in the return direction with respect to the moving speed in the tension direction.
- the start timing of tension is set.
- the succeeding tensile chuck 2B (2A) is at a timing T1 earlier by a time Ts from the timing T2 at which the distance between the preceding tensile chuck 2A (2B) and the extrusion die 10 reaches the set distance L at the second position (II). Holds the parison P at the first position (I), and then the leading tension chuck 2A (2B) and the trailing tension chuck 2B (2A) both hold the parison P and move.
- each of the tensile chucks 2A and 2B operates according to the same operation curve having a phase difference, and constantly constrains the parison P to apply tension.
- the leading tension chuck 2A (2B) and the trailing tension chuck 2B (2A) both move so as to be separated from the extrusion die 10 while gripping the parison P.
- the interval between the leading tension chuck 2A (2B) and the tension chuck 2B (2A) following it is kept constant during the time Ts. ing.
- a part or all of the time Ts described above can be set as a delivery period in which the parison part Ps is separated from the parison P and delivered to the blow mold.
- the parison P is continuously discharged, and while always constraining the parison P and applying an appropriate tension, the parison portion Ps is continuously blown in a delivery period set within the time Ts. It can be supplied to a mold.
- FIGS. 3 to 5 are explanatory views showing the receiving means (receiving method) in the parison supplying device 1 (parison supplying method) according to the embodiment of the present invention.
- the receiving means is a means for receiving the parison part Ps separately from the parison P, and as shown in FIGS. 3 and 4, the blow mold itself can be the receiving means.
- receiving means for example, a pickup chuck etc.
- the receiving means included in the parison supply device 1 according to the embodiment of the present invention has the second position of the tension chuck 2A (2B) that precedes the subsequent tension chuck 2B (2A) gripping the parison P.
- the parison portion Ps is received during the delivery period provided between the extrusion die 10 and the set distance L in (II), that is, during the above-described time Ts.
- the operation timing at which the tension chuck 2A leading from the operation timing [T1] at which the subsequent tension chuck 2B grips the parison P at the first position (I) reaches the second position (II) [ Until the time T2] (time Ts), as shown in FIGS. 3 (a) to 3 (e), the tensile chucks 2A and 2B both move away from the extrusion die 10 at a constant distance, and blow molding occurs.
- the mold 4 moves from the first position (I) to the second position (II) synchronously with it. Thereby, the blow mold 4 is positioned between the tension chucks 2A and 2B until the receiving operation is completed.
- the blow mold 4 is made to be able to move back and forth to the discharge path of the parison P, and gradually approach the central axis of the parison P as it descends (see FIGS. 3 (a) and 3 (b)).
- the parison P is sandwiched to receive the parison portion Ps (see FIG. 3C).
- the blow mold 4 incorporating the parison part Ps gradually moves away from the central axis of the parison P while being further lowered and shifts to the blow molding process (see FIGS. 3D and 3E).
- the tension chuck 2A leading from the operation timing [T1] at which the subsequent tension chuck 2B grips the parison P at the first position (I) is from the extrusion die 10 at the second position (II)
- the tension chucks 2A and 2B are held at a fixed position while maintaining a constant interval until the operation timing "T2" at which the set distance L separates (time Ts).
- the blow mold 4 is moved horizontally to intersect the central axis of the parison P. Thereby, the blow mold 4 is positioned between the tension chucks 2A and 2B until the receiving operation is completed.
- the extrusion die 10 is moved upward so that the distance between the tension chuck 2B and the extrusion die 10 gradually separates, and continuous discharge of the parison P is continued.
- the blow mold 4 gradually approaches the central axis of the parison P while moving horizontally (see FIGS. 4A and 4B), and the central axis of the blow mold 4 and the parison P When the central axes coincide with each other, the parison P is inserted to separate the parison portion Ps (see FIG. 4C). Thereafter, the blow mold 4 incorporating the parison part Ps gradually moves away from the central axis of the parison P while moving horizontally, and shifts to the blow molding process (see FIGS. 4D and 4E).
- the tension chuck 2B is lowered to the second position (II) and the extrusion die 10 is lowered to the position of FIG. 4 (a).
- the lowering speed of the tension chuck 2B with respect to the lowering speed of the extrusion die 10 is set faster by the speed at which the extrusion die 10 separates from the tension chuck 2B in FIGS. 4 (a) to 4 (d).
- the tension chuck 2A moves to the first position (I).
- the operation timing at which the tension chuck 2A leading from the operation timing [T1] at which the subsequent tension chuck 2B grips the parison P at the first position (I) reaches the second position (II) [ Until the time T2] (time Ts), as shown in FIGS. 5 (a) to 5 (e), the tensile chucks 2A and 2B both move away from the extrusion die 10 while maintaining a constant distance, and blow molding
- the mold 4 moves horizontally in synchronization with it.
- a pickup chuck 5 which is a receiving means different from the blow mold 4 is provided.
- the pair of pickup chucks 5 ⁇ / b> A and 5 ⁇ / b> B are disposed apart in the discharge direction of the parison P.
- the pickup chucks 5A and 5B move in synchronization with the tension chucks 2A and 2B, and move between the tension chucks 2A and 2B until the receiving operation is completed.
- the blow mold 4 is moved horizontally, but may be stationary at a predetermined position.
- the pickup chucks 5A and 5B gradually approach the parison P while lowering while maintaining a constant distance (see FIGS. 5A and 5B), and the parison P is moved at a predetermined chucking position.
- the parison portion Ps is gripped and separated and received, and delivered to the blow molding die 4 (see FIGS. 5 (c) and 5 (d)).
- the pickup chucks 5A and 5B are further lowered while being gradually separated from the central axis of the parison P, and the blow molding die 4 supplied with the parison portion Ps shifts to the blow molding process (FIG. 5 (d), (e) )reference).
- the pickup chucks 5A and 5B move in synchronization with the tension chucks 2A and 2B, and also move in synchronization with the blow mold 4.
- the received parison part Ps can be efficiently delivered to the blow mold 4 with a minimum amount of movement.
- secondary processing of the parison Ps can be performed by moving the pickup chucks 5A and 5B relative to each other. For example, they can be separated in parallel to the extrusion direction to carry out further tensioning, arranged in a direction perpendicular to the extrusion direction and arranged (tensioned) obliquely, rotated around the extrusion direction as an axial center, etc.
- the parison supply device 1 According to the parison supply device 1 according to the embodiment of the present invention described above or the parison supply method using the parison supply device 1, alternately operating the plurality of tension chucks 2 (individual tension chucks 2A, 2B) Then, the parison P discharged from the extrusion die 10 can be constantly restrained to apply linear tension. By this, even when the parison P is discharged vertically downward, the thickness non-uniformity due to the drawdown can be suppressed, and an appropriate tension that does not change the direction and speed is applied to blow while maintaining this tensile state. It can be supplied to the mold 4.
- a high quality parison portion Ps having high uniformity of thickness and excellent molecular orientation and the like is supplied to the blow mold 4 be able to.
- the parison supply device 1 or the parison supply method according to the embodiment of the present invention in the process of continuously discharging the parison P from the extrusion die 10, the parison P is constantly kept in a state of being appropriately tensioned. A state in which the parison P is gripped by the pair of tension chucks 2A and 2B is continued for a time Ts, and there is a delivery period. By securing such a delivery period while applying appropriate tension to the parison P, it becomes possible to continuously supply the high-quality parison portion Ps to the blow mold 4.
- the parison portion Ps can be received and delivered to the blow molding die 4 by the pair of pickup chucks 5A, 5B. Therefore, the movement of the blow mold 4 and the extrusion die 10 can be separated from the movement of the tension chuck 2 to be stationary or simplified.
- the above-described high quality can be obtained also in various conveyance forms (horizontal rotary type, shuttle type, vertical rotary type, etc.) of the blow molding die 4.
- the parison part Ps can be supplied.
- the parison portion Ps is slackened. It is possible to prevent shaking and to supply the parison portion Ps in a stable state.
- the moving speed in the tensile direction of the tensile chuck 2 is always constant, but as a modification, the moving speed in the tensile direction of the tensile chuck 2 is changed to change the blow molding die 4
- the tension state of the parison portion Ps supplied to can be changed to a desired state.
- the moving velocity of the preceding tension chuck 2A (2B) is changed after the subsequent tension chuck 2B (2A) grips the parison P.
- the pickup chuck 5 and the tension chuck 2 may be integrated, and the tension chuck operation unit 3 may perform holding of the parison, tension, and mold supply.
- FIG. 6 shows an operation curve of the tension chuck in the above-described modification.
- the horizontal axis represents time T
- the vertical axis represents distance Z from the extrusion die 10.
- the broken line in the solid line represents the operation curve of the tension chuck 2A
- the broken line in the broken line represents the operation curve of the tension chuck 2B.
- the subsequent tension chuck 2B (time Ts earlier than the timing T2 when the distance between the leading tension chuck 2A (2B) and the extrusion die 10 reaches the set distance L at the second position (II) 2A) holds the parison P at the first position (I), and then the leading tension chuck 2A (2B) and the trailing tension chuck 2B (2A) both move by sandwiching the parison P in the embodiment described above. It is the same as the form.
- the moving speed of the tensile chucks 2A and 2B in the tension direction is changed midway, and the moving speed after timing T1 is made faster than the moving speed before it, thereby changing the tension state of the parison P There is.
- the distance Zs between the two tension chucks 2A and 2B is gradually increased to obtain a higher tensile force.
- the parison supply device 1 can be applied to various types of blow molding machines by devising the receiving means such as the pickup chuck 5 as described above, but in particular, the horizontal rotary
- the horizontal rotary type or shuttle type blow molding machine is provided with a molding die conveying means (such as a molding die turret) for conveying the blow molding die in the direction (horizontal direction) intersecting the discharge direction (vertical direction) of the parison P. .
- the overall length of the mold is restricted in accordance with the number of molds disposed on one mold turret that rotates longitudinally, and therefore the height of the molded body is low. Also, there is a disadvantage that the length of the parison portion supplied to one mold can not be changed, and a molded body can not be obtained at a high yield with respect to the parison discharged from the extrusion die.
- the height of the mold can be set independently of the number of molds arranged on the molding turret etc. A high yield can be obtained by supplying together.
- a horizontal rotary type or shuttle type blow molding machine to which the parison supply device 1 according to the embodiment of the present invention is applied realizes continuous parison supply using the delivery period of time Ts described above. be able to.
- Ts delivery period of time
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- Engineering & Computer Science (AREA)
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Abstract
Description
2(2A,2B):引張チャック,3:引張チャック動作部,
4:ブロー成形型,5(5A,5B):ピックアップチャック,
10:押出ダイ,
P:パリソン,Ps:パリソン部分
Claims (11)
- 押出ダイから吐出されたパリソンから所定長さのパリソン部分をブロー成形型に連続供給するパリソン供給装置であって、
パリソンを把持して押出ダイとの間でパリソンの吐出方向に引っ張る引張チャックを複数備えると共に、複数の前記引張チャックを動作させる引張チャック動作部を備え、
前記引張チャック動作部によって、
個々の前記引張チャックが前記押出ダイに近い第1位置でパリソンを把持して前記押出ダイと離間した第2位置まで移動する繰り返し動作を行い、先行する前記引張チャックが前記第2位置にて前記押出ダイと設定距離だけ離間する前にその後続の前記引張チャックが前記第1位置にてパリソンを把持した後、前記ブロー成形型に前記パリソン部分を供給することを特徴とするパリソン供給装置。 - 前記引張チャック動作部は、前記引張チャックを前記第1位置から前記第2位置まで一定速度で移動させることを特徴とする請求項1記載のパリソン供給装置。
- 前記引張チャック動作部は、後続の前記引張チャックがパリソンを把持した後に先行する前記引張チャックの移動速度を変化させることを特徴とする請求項1記載のパリソン供給装置。
- 前記パリソン部分を受け取る受取手段を備え、
前記受取手段は、後続の前記引張チャックがパリソンを把持してから先行する前記引張チャックが前記第2位置にて前記押出ダイと設定距離だけ離間するまでの間に前記パリソン部分を受け取ることを特徴とする請求項1~3のいずれか1項に記載のパリソン供給装置。 - 前記受取手段は、受取操作が完了するまで、先行する前記引張チャックとその後続の前記引張チャックの間に位置して移動することを特徴とする請求項4に記載のパリソン供給装置。
- 前記受取手段は、パリソンの吐出方向に離間した一対のピックアップチャックであり、前記パリソン部分を把持して受け取り、ブロー成形型に受け渡すことを特徴とする請求項4又は5に記載のパリソン供給装置。
- 前記受取手段は、パリソンの吐出経路に進退可能とされたブロー成形型であり、パリソンの吐出経路に進入して前記パリソン部分を受け取ることを特徴とする請求項4又は5に記載のパリソン供給装置。
- 請求項1~7のいずれか1項に記載されたパリソン供給装置を備えたブロー成形機であって、前記ブロー成形型を前記パリソンの吐出方向と交差する方向に搬送する搬送手段を備えることを特徴とするブロー成形機。
- 押出ダイから吐出されたパリソンから所定長さのパリソン部分をブロー成形型に連続供給するパリソン供給方法であって、
パリソンを把持して押出ダイとの間でパリソンの吐出方向に引っ張る引張チャックを複数備え、
個々の前記引張チャックが前記押出ダイに近い第1位置でパリソンを把持して前記押出ダイと離間した第2位置まで移動する繰り返し動作を行い、先行する前記引張チャックが前記第2位置にて前記押出ダイと設定距離だけ離間する前にその後続の前記引張チャックが前記第1位置にてパリソンを把持した後、前記ブロー成形型に前記パリソン部分を供給することを特徴とするパリソン供給方法。 - 先行する前記引張チャックとその後続の前記引張チャックが共にパリソンを把持した状態で前記押出ダイから離間する受渡期間を有することを特徴とする請求項9記載のパリソン供給方法。
- 前記受渡期間では、先行する前記引張チャックとその後続の前記引張チャックの間隔が一定に保持されることを特徴とする請求項10記載のパリソン供給方法。
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EP14789117.0A EP2990177B1 (en) | 2013-04-24 | 2014-04-23 | Parison supply device and supply method |
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EP3269528A4 (en) * | 2015-03-12 | 2018-10-03 | Daisho Glass Co., Ltd. | Container having inner spiral, method for manufacturing container having inner spiral, and apparatus for manufacturing same |
US20190039278A1 (en) * | 2016-02-04 | 2019-02-07 | Toyo Seikan Co., Ltd. | Blow molding apparatus and blow molding method |
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JP5904248B1 (ja) * | 2014-09-25 | 2016-04-13 | 東洋製罐株式会社 | パリソン保持切断装置及びハリソン保持切断方法 |
JP5867562B1 (ja) * | 2014-09-24 | 2016-02-24 | 東洋製罐株式会社 | 押出ブロー成形機 |
JP5904255B1 (ja) * | 2014-10-27 | 2016-04-13 | 東洋製罐株式会社 | ブロー成形装置及びブロー成形方法 |
WO2016021435A1 (ja) * | 2014-08-04 | 2016-02-11 | 東洋製罐株式会社 | パリソン供給装置及び供給方法、これらを用いたブロー成形機及びブロー成形方法 |
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