WO2017135242A1 - ブロー成形装置及びブロー成形方法 - Google Patents
ブロー成形装置及びブロー成形方法 Download PDFInfo
- Publication number
- WO2017135242A1 WO2017135242A1 PCT/JP2017/003384 JP2017003384W WO2017135242A1 WO 2017135242 A1 WO2017135242 A1 WO 2017135242A1 JP 2017003384 W JP2017003384 W JP 2017003384W WO 2017135242 A1 WO2017135242 A1 WO 2017135242A1
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- WO
- WIPO (PCT)
- Prior art keywords
- parison
- blow
- supply position
- mold
- blow molding
- Prior art date
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Classifications
-
- 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
-
- 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
- B29C49/24—Lining or labelling
- B29C49/2408—In-mould lining or labelling
-
- 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
- B29C49/32—Blow-moulding apparatus having movable moulds or mould parts moving "to and fro"
-
- 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
- B29C49/42069—Means explicitly adapted for transporting blown article
-
- 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
- B29C49/56—Opening, closing or clamping 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
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2008—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements inside the article
-
- 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
- B29C49/70—Removing or ejecting blown articles from the mould
- B29C2049/701—Ejecting 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
- B29C49/006—Blow-moulding plants, e.g. using several blow-moulding apparatuses cooperating
-
- 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
-
- 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
- B29C49/4252—Auxiliary operations prior to the blow-moulding operation not otherwise provided for
-
- 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
Definitions
- the present invention relates to a blow molding apparatus and a blow molding method for performing blow molding by supplying a parison discharged from a die head to a blow mold.
- a blow molding for forming a hollow container or the like a molding method in which a hollow pipe-shaped thermoplastic melt discharge (hereinafter referred to as a parison) discharged from a die head is sandwiched between blow molds and blown air is blown into the parison in the mold ( Direct blow molding method) is known.
- a parison a hollow pipe-shaped thermoplastic melt discharge (hereinafter referred to as a parison) discharged from a die head is sandwiched between blow molds and blown air is blown into the parison in the mold
- the blow molding apparatus for performing such blow molding is roughly classified according to the movement type of the mold, and a rotary type that sequentially moves a plurality of molds to a parison supply position along an annular track, and one or a plurality of molds.
- a shuttle type that moves the car linearly to the parison supply position.
- the rotary blow molding device is suitable for mass production of one kind of hollow container because a large number of molds are arranged in an annular track, and it is necessary to frequently change a small number of molds.
- a shuttle type blow molding apparatus is suitable for production.
- the rotary blow molding apparatus is a time for supplying a parison to a mold in a period of time until one of a plurality of molds arranged on an annular track returns to its original position.
- the process time such as the blow time and the time for taking out the molded product from the mold is allocated at a constant rate. Therefore, for example, in order to change the blow time longer, it is necessary to slow down the moving speed of the mold, which reduces productivity.
- the optimum mold size may be regulated depending on the number of molds and the radius of rotation. Furthermore, when changing molds to cope with a wide variety of products, since a large number of molds are combined into one set, a great amount of time is required for the exchange. Therefore, the rotary type blow molding apparatus is not suitable for the production of various small quantities.
- the shuttle-type blow molding apparatus can adjust the blow time independently of the operation time of other processes, and the number of molds is small, so that the time required for mold replacement can be reduced. Since it is short, it is suitable for various small-scale production.
- the productivity is also limited by the discharge speed of the parison, and further, drawdown occurs in the parison discharged from the die head, Immediately after the parison is sandwiched between the molds, there is a problem that it is difficult to supply a good quality parison to the mold because the parison is accumulated on the upper part of the mold.
- the present invention has been proposed in order to cope with such problems.
- blow molding it is suitable for production in a variety of small quantities, while improving productivity, and supplying a high-quality parison to the mold. It is an object of the present invention to obtain a high-quality molded product by doing so.
- the blow molding apparatus according to the present invention has the following configuration.
- the parison supply unit includes a die head for discharging a parison, a parison supply unit that separates and conveys the discharged parison at a set length, and a blow molding unit that sandwiches the supplied parison with a blow mold and performs blow molding.
- a blow molding unit that sandwiches the supplied parison with a blow mold and performs blow molding.
- the blow molding method of the present invention has the following configuration.
- the parison discharged from the die head is alternately placed at a first supply position set on one side of the left and right of the discharge center and a second supply position set on the other side of the left and right of the discharge center.
- the blow molding method is characterized in that the blow molding step is carried out by sandwiching the supplied parison with a blow mold arranged at each of the first supply position and the second supply position.
- the blow molding apparatus and the blow molding method having such characteristics can improve productivity while being suitable for various kinds of small-volume production.
- a high-quality molded product can be obtained by supplying a high-quality parison to the mold.
- FIG. 7 is an explanatory diagram for explaining an operation example of the parison supply unit shown in FIG. 6 ((a) to (e) show the operation timing of each stage). It is explanatory drawing which showed the taking-out apparatus and the label inserter.
- the blow molding apparatus 1 includes a die head 2 that discharges a parison, a parison supply unit 3 that separates and conveys the discharged parison at a set length, and the supplied parison by a blow mold 40. And a blow molding part 4 for performing sandwich blow molding.
- the parison discharged from the die head 2 is referred to as “parison P”, and the separated parison is referred to as “parison P1”.
- the die head 2 has a discharge port vertically downward, and discharges the extruded hollow cylindrical parison P vertically downward at a predetermined discharge speed.
- the illustrated P0 indicates the discharge center of the die head 2 and coincides with the central axis of the parison P to be discharged.
- the parison supply unit 3 includes a pickup chuck 10 that grips and conveys the parison P1 separated from the discharged parison P by a predetermined length.
- the pickup chuck 10 has the separated parison P1 set to the first supply position S1 on the left and right sides with respect to the discharge center P0 of the die head 2, and the second supply position set on the other left and right sides with respect to the discharge center P0. In S2, it is conveyed alternately.
- the first supply position S1 and the second supply position S2 are set one by one on the left and right, but not limited to this, a plurality of supply positions are set on one side of the left and right, and a plurality of supply positions are set on the other side. May be.
- the illustrated pickup chuck 10 includes a chuck portion 10A on one end side (tip side), and holds and holds the parison P being discharged by the chuck portion 10A. Further, the pickup chuck 10 rotates around a rotation center 10P provided on the other end side (base end side), so that the chuck portion 10A conveys the parison P1 in a circular orbit.
- the transport path of the parison P1 from the discharge center P0 to the first supply position S1 or the second supply position S2 is the rotation center 10P of the pickup chuck 10 so that a linear trajectory is drawn after the chuck portion 10A draws a circular trajectory. It may be transported by sliding it to 10P ′ or it may be transported only by a circular orbit. Furthermore, while drawing a circular orbit, the rotation center 10P of the pickup chuck 10 is slid to 10P ′ for conveyance, or the rotation center 10P of the pickup chuck 10 is rotated during the slide. You may stop and transport. When a plurality of supply positions are provided on the left and right sides of the discharge center, the transport path of the pickup chuck 10 is appropriately set according to the supply position.
- the pickup chuck 10 is rotated by 180 ° around the rotation center 10P to separate one parison P discharged from the die head 2 by a set length, and the right and left first
- the rotation angle can be appropriately set according to the positions of the first supply position S1 and the second supply position S2.
- the pickup chuck 10 is constituted by a first pickup chuck 11 and a second pickup chuck 12 which are provided with a set angle ⁇ (90 ° in the illustrated example) opened around the rotation center 10P.
- ⁇ 90 ° in the illustrated example
- 12A is located at the discharge center P0 of the parison P
- the first pickup chuck 12A is moved to the second supply position S2 while the chuck portion 12A on one end side of the second pickup chuck 12 is moved to the second supply position S2.
- 11 is located on the discharge center P0 of the parison P.
- the rotation range of the pickup chuck 10 is kept within the set angle ⁇ (90 °). 2 is not limited to the circular orbit, but a combination of a circular orbit and a linear orbit similar to the pickup chuck 10 of FIG. 1 described above.
- the parison P1 may be transported.
- the blow molding unit 4 includes a blow mold 40 at each of the first supply position S1 and the second supply position S2, and performs blow molding by sandwiching the parison P1 supplied to each of the blow molds 40.
- the first blow mold 40 (A) is disposed at the first supply position S1
- the second blow mold 40 (B) is disposed at the second supply position S2.
- Each blow mold 40 performs only an opening / closing operation at a fixed position without moving.
- FIG. 3 shows an example of the operation process of the blow molding apparatus 1 shown in FIG.
- the pickup chuck 10 repeatedly moves and stops at a predetermined timing, grips the parison P at the discharge center P0, transports the parison P1 separated into the set length, releases the parison P1 at the first supply position S1, and discharges the parison P1.
- the operations of returning toward the center P0, gripping the parison P at the discharge center P0, transporting the parison P1 separated to the set length, and releasing the parison P1 at the second supply position S2 are repeated.
- the supplied parison P1 is clamped in the mold by clamping, and in the blow molding step T2, air blow starts, ends, cools, and cools down the parison P1 sandwiched in the mold.
- a series of operations of opening the mold and taking out the molded product is performed.
- the time from one parison supply step T1 to the next parison supply step T1 can be set as appropriate. Since each process of the blow molding process T2 can be appropriately set within the time, it is possible to appropriately change in accordance with the production of various small quantities such as setting the blow time.
- each blow molding unit 4 receives the second blow mold 40 at the second supply position S2 after the parison P1 is supplied to the first blow mold 40 (A) at the first supply position S1.
- the blow molding process T2 of the first blow mold 40 (A) is started (air blow to the first blow mold 40 (A) is started).
- the parison P1 is supplied to the second blow mold 40 (B) at the second supply position S2.
- the parison P1 is supplied to the first blow mold 40 (A) at the first supply position S1.
- Can be started the air blow to the second blow mold 40 (B) is started) for the second blow mold 40 (B).
- the process time of the blow molding step T2 in the plurality of blow molding parts 4 can be partially overlapped, the plurality of blow molding parts 4 can be efficiently operated to obtain high productivity. be able to.
- the movement of the blow mold 40 is not included in the example shown in FIG. 1, the operation speed of the pickup chuck 10 can be increased and the productivity of the entire blow molding apparatus 1 can be improved.
- this blow molding apparatus 1 since the parison P1 separated from the parison P discharged from the die head 2 by a predetermined length is gripped by the pickup chuck 10 and supplied to the individual blow molds 40, it is discharged. Compared with the case where the parison P is directly sandwiched between the molds, it is possible to eliminate the accumulation of the parison above the mold and supply a high-quality parison. Thereby, the quality of a molded product can be improved.
- FIG. 4 shows another equipment configuration of the blow molding apparatus 1.
- the blow molding unit 4 in each of the first supply position S1 and the second supply position S2, the blow molding unit 4 includes a plurality of blow molds 40, and a mold that linearly reciprocates the plurality of blow molds 40.
- a moving mechanism 5 is provided.
- Other configurations are the same as the example shown in FIG.
- the first blow mold 40 (A) and the third blow mold 40 (C) are arranged with respect to the first supply position S1, and the second supply is performed.
- P1 is sequentially conveyed to the first blow mold 40 (A), the second blow mold 40 (B), the third blow mold 40 (C), and the fourth blow mold 40 (D). .
- the mold moving mechanism 5 moves the first blow mold 40 (A) to the first supply position S1 and simultaneously moves the third blow mold 40 (C) to the first supply position S1.
- the third blow mold 40 (C) is moved (retracted) from the supply position S1
- the first blow mold 40 (A) is moved (retracted) from the first supply position S1
- the third blow mold 40 (C) is moved to the first supply position S1.
- the mold moving mechanism 5 moves the second blow mold 40 (B) to the second supply position S2 and simultaneously moves the fourth blow mold 40 (D) to the second supply position S2.
- the second blow mold 40 (B) is moved (withdrawn) from the second supply position S2, and the second blow mold 40 (B) is moved (withdrawn) from the second supply position S2, and at the same time, the fourth blow mold 40 (D) is second supplied. Move to position S2.
- FIG. 5 shows an example of the operation process of the example shown in FIG.
- the operation process of the pickup chuck 10 is omitted, but the movement of the pickup chuck 10 with respect to the first supply position S1 and the second supply position S2 is the same as the example shown in FIG.
- each blow molding part 4 a parison supply process T1 and a blow molding process T2 are performed, and a mold movement for operating the above-described mold movement mechanism 5 is performed in parallel with the blow molding process T2.
- the parison supply to each blow mold 40 is performed by combining the operation of the pickup chuck 10 and the movement of the mold moving mechanism 5.
- the parison P1 is sequentially supplied to the blow mold 40 in the order of (D).
- the parison P1 is supplied to the first blow mold 40 (A) at the first supply position S1
- the parison P1 is supplied to the second blow mold 40 (B) at the second supply position S2.
- the mold movement and the mold stop are performed before the parison P1 is supplied to the fourth blow mold 40 (D) at the second supply position S2.
- FIG. 5 shows an example of an operation process for each individual blow mold 40.
- the parison supply process T1 of the first blow mold 40 (A) on the first supply position S1 side is the second blow mold.
- 40 (B) is moved to the second supply position S2, and the fourth blow mold 40 (D) is moved (retracted) from the second supply position S2.
- the mold is moved (withdrawn) from the first supply position S1 by moving the mold, and the blow molding process T2 is started in parallel with the mold movement, and each process (air blow start / end, cooling, mold Open and take out the molded product).
- the movement of the blow mold 40 (A) during the blow molding step T2 is moved (retracted) from the first supply position, temporarily stopped, and then moved back to the first supply position S1 to obtain the first supply position.
- the mold is opened and the molded product is taken out and the parison supply step T1 is performed.
- the third blow mold 40 (C) at the first supply position S1 moves to the first supply position S1 simultaneously with the movement (retraction) of the first blow mold 40 (A). Then, the parison supply process T1 to the third blow mold 40 (C) is stopped at the same time as the first blow mold 40 (A) stops during the blow molding process T2, and the second blow mold 40 It is performed when the mold 40 (B) is moved (retracted) from the second supply position S2 and the fourth blow mold 40 (D) is moved to the second supply position S2. Then, each process is performed similarly to the 1st blow die 40 (A) mentioned above.
- the parison supply process T1 of the second blow mold 40 (B) on the second supply position S2 side moves (retracts) the first blow mold 40 (A) from the first supply position S1, 3 is performed when the third blow mold 40 (C) is moved to the first supply position S ⁇ b> 2, and thereafter, each process is performed in the same manner as the first blow mold 40 (A) described above.
- the fourth blow mold 40 (D) at the second supply position S2 moves to the first supply position S1 simultaneously with the movement (retraction) of the second blow mold 40 (B).
- the parison supply process T1 to the fourth blow mold 40 (D) is stopped at the same time as the second blow mold 40 (B) is stopped during the blow molding process T2, and the first blow mold 40 This is performed when the mold 40 (A) is moved to the first supply position S1 and the third blow mold 40 (C) is moved (retracted) to the first supply position S1. Then, each process is performed similarly to the 1st blow die 40 (A) mentioned above.
- the blow mold 40 needs to be moved.
- the movement is only a linear reciprocating movement, the blow mold 40 can be moved at a predetermined speed.
- the movement of the blow mold 40 can be simplified, and high productivity can be obtained as compared with the conventional technique in which the blow mold is moved in a complicated manner. it can.
- the parison P1 separated by a predetermined length from the parison P discharged from the die head 2 is gripped by the pickup chuck 10 and conveyed to the individual blow molds 40. Compared with the case of directly sandwiching the mold, it is possible to eliminate the accumulation of the parison above the mold and supply a high-quality parison. Thereby, the quality of a molded product can be improved.
- the parison supply unit 3 for separating and transporting the parison P discharged from the die head 2 at a set length includes a pair of upper and lower pickup chucks 10 with an interval set according to the length of the parison P1 to be cut out.
- An upper pickup chuck 10 (U) and a lower pickup chuck 10 (D) are provided.
- the upper pickup chuck 10 (U) and the lower pickup chuck 10 (D) are both constituted by a first pickup chuck 11 and a second pickup chuck 12 as shown in FIG.
- the upper pickup chuck 10 (U) has concave portions inside the chuck portions 11A and 12A so as to hold the parison in an open state in order to ensure insertion of the blow pin into the parison.
- the lower pickup chuck 10 (D) is linear on the inner side of the chuck portions 11B and 12B so that the lower pickup chuck 10 (D) can be gripped in a crushed state.
- the upper pickup chuck 10 (U) and the lower pickup chuck (D) are supported by an elevating mechanism 13 so as to be vertically movable up and down, and are controlled to rotate by a drive unit 14.
- the 6 further includes a pinch mechanism 20 that holds the parison P discharged from the die head 2 and cuts the parison P at a predetermined timing.
- the pinch mechanism 20 includes a pinch part 21 that holds the parison P to be discharged, a cutter part 22 that cuts the parison, and an operation part 23 that moves the pinch part 21 and the cutter part 22 together.
- the pinch mechanism 20 holds the parison P above the chuck position of the upper pickup chuck 10 (U), moves downward while pulling the discharged parison P, and repeats the operation of cutting the parison at a predetermined timing. .
- the pinch part 21 and the cutter part 22 of the pinch mechanism 20 are integrated together so as to move up and down between a first position I near the die head 2 along the vertical direction and a second position II away from the die head 2.
- the moving operation is repeated, and the operation of moving downward on the discharge center P0 and the operation of moving upward at a position away from the discharge center P0 are repeated.
- the pinch mechanism 20 pulls the parison P in the process of moving downward after the pinch portion 21 holds the parison P at the first position I. That is, the moving speed of the pinch unit 21 that moves from the first position I to the second position II is set to be faster than the descent speed of the parison P. In the process in which the preceding pinch part 21 moves downward, the succeeding pinch part 21 holds the parison P, so that the pair of pinch parts 21 holds the parison P of the set length (see (a)).
- the upper pick-up chuck 10 (U) and the lower pick-up chuck 10 (D) are held at a constant interval and move downward in accordance with the movement of the pinch part 21, while moving to the pair of pinch parts 21. It operates so as to approach the held parison P (see (a) and (b)). Then, immediately after the upper pickup chuck 10 (U) and the lower pickup chuck 10 (D) grip the parison P at the same time, the cutter unit 22 of the pinch mechanism 20 operates to detach the parison P1 ((c), (See (d)).
- the parison P1 held between the upper pickup chuck 10 (U) and the lower pickup chuck 10 (D) is moved by the movement of the upper pickup chuck 10 (U) and the lower pickup chuck 10 (D). It is conveyed toward the blow mold 40 arranged at the first supply position S1 or the second supply position S2 (see (e)).
- a take-out device 30 is provided in the illustrated example.
- the take-out device 30 is a device that takes out a bottle W, which is a molded product formed by the blow mold 40, from the blow mold 40 after molding, and includes a gripping hand 31, a support arm 32, and a moving mechanism. 33, a label holding unit 50 is provided.
- the gripping hand 31 is driven by the actuator 31A and grips a part of the bottle W (gripping part W1) protruding from the blow mold 40.
- a part of the parison sandwiched between the blow molds 40 protrudes to the outside (upper side) of the blow mold 40, so that the gripping portion W1 is outside the blow mold 40. Is formed.
- the gripping hand 31 can grip the bottle W before the blow mold 40 is opened by gripping the gripping portion W1.
- the support arm 32 supports the grip hand 31 and also supports the label holding unit 50.
- the support arm 32 moves linearly by the moving mechanism 33, and approaches and separates from the blow mold 40.
- the moving mechanism 33 includes a slide guide 33A that extends linearly and an actuator 33B that moves the support arm 32 along the slide guide 33A.
- the label holding unit 50 supported by the support arm 32 sucks and holds one label L1a and L1b from the label bundle La and Lb, respectively, in order to insert a label to be attached to the bottle W into the blow mold 40.
- the suction pad 51 and the telescopic cylinder 52 are provided.
- the moving mechanism 33 in the take-out device 30 moves the support arm 32 from the first position (home position) shown in FIG. 8 to the second position (gripping position) shown in FIG. 9, and further shown in FIG. After moving to the third position (label insertion position), it moves again to the first position (home position) as shown in FIG.
- the label holding unit 50 faces the label bundles La and Lb, and the individual labels L1a and L1b from the label bundles La and Lb. Hold.
- the label holding unit 50 includes the suction pad 51 and the telescopic cylinder 52, and the suction pad 51 abuts against the label bundles La and Lb at the position where the telescopic cylinder 52 extends, where one label L1a, L1b is sucked and held, and the telescopic cylinder 52 is contracted.
- the state shown in FIG. 8 is a state where a blow pin (not shown) is inserted into a parison sandwiched between blow molds 40 and blow molding is being performed (during blowing), or after blow molding.
- the moving mechanism 33 moves the support arm 32 to the second position, and the gripping hand 31 moves the gripping part of the bottle W at this position. Grip W1.
- the label holding unit 50 supported by the support arm 32 moves to the vicinity of the blow mold 40 while holding the labels L1a and L1b as the support arm 32 moves.
- the blow mold 40 is opened while the support arm 32 is held in the second position.
- the bottle W is separated from the left and right molds by being held by the holding hand 31.
- the labels L1a and L1b inserted in the blow mold 40 in the previous cycle are attached to the bottle W separated from the mold.
- the support arm 32 is moved to the third position, so that the label holding unit 50 supported by the support arm 32 is positioned between the left and right molds.
- the label holding unit 50 extends the contracted expansion / contraction cylinder 52 and inserts the labels L1a and L1b sucked and held by the suction pad 51 into the mold.
- the label holding unit 50 shows an example in which the labels L1a and L1b are inserted into both the left and right molds.
- the present invention is not limited to this, and the label is inserted into only one mold. May be.
- the gripping hand 31 maintains a state where the bottle W is gripped.
- the support arm 32 is returned to the first position.
- the gripping hand 31 is released from the gripping state shown in the figure, and at the same time, the bottle W is transferred and discharged onto the conveyor by a transfer hand (not shown).
- the label holding unit 50 is in a state of facing the label bundles La and Lb, and is in a standby state for holding the label in the next cycle.
- FIG. 13 shows a time chart of the above-described operation.
- the label holding unit 50 starts the operation of attracting the labels L1a and L1b from the label bundles La and Lb at the timing T1, and the support arm 32 is moved from the first position (home position) to the second at the timing T2. It moves to the position (gripping position), the gripping operation of the gripping hand 31 is started, the opening operation of the blow mold 40 starts at timing T3, and the opening operation of the blow mold 40 is completed at timing T4. Then, the support arm 32 starts to move from the second position (gripping position) to the third position (sticking position), and at time T5, the support arm 32 reaches the third position (sticking position) and holds the label. The sticking operation of the unit 50 is started, and the support arm 32 is returned to the first position (home position) at timing T6.
- the operation of moving the support arm 32 to the third position (sticking position) is an extension of the operation of moving the support arm 32 to the second position (gripping position).
- the moving operation of 31 and the moving operation of the label holding unit 50 can be performed. For this reason, a moving mechanism for individually moving the label holding unit can be omitted, and the installation space efficiency of the facility can be increased.
- the blow molding apparatus 1 As described above, the blow molding apparatus 1 according to the embodiment of the present invention or the blow molding method using the same has the parison P1 separated by a predetermined length from one parison P discharged downward from the die head 2.
- a parison supply process T1 is performed in which the paper is distributed and transported to the first supply position S1 and the second supply position S2 provided on the left and right of the discharge center P0, respectively.
- An independent blow molding process T2 is performed in the blow molding section 4 provided in each of the second supply positions S2.
- blow molding step T2 performed at each of the first supply position S1 and the second supply position S2 can be partially overlapped to perform the blow molding with high efficiency. For this reason, it is possible to perform blow molding with high productivity while having an equipment configuration suitable for various kinds of small volume production.
- the parison supply unit 3 separates the discharged parison P into a set length and supplies it to the blow mold 40.
- a small amount of high-quality parison P1 can be supplied to the blow mold 40, and a high-quality molded product can be obtained by blow molding.
- the pick-up chuck 10 upper pick-up chuck 10 (U) and lower pick-up chuck 10 (D)) is moved downward and the parison P discharged downward is grasped and conveyed.
- the parison P1 with little deformation can be separated without waste, and it becomes possible to efficiently supply the high-quality parison P1.
- the blow molding device 1 and the blow molding method according to the embodiment of the present invention can improve productivity while being suitable for various kinds of small-volume production, and supply a high-quality parison to the mold. Thus, a high-quality molded product can be obtained.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
4:ブロー成形部,40(A,B,C,D)ブロー金型,5:金型移動機構,
10:ピックアップチャック,
10(U):上側ピックアップチャック,
10(D):下側ピックアップチャック,
11:第1ピックアップチャック,12:第2ピックアップチャック,
10P:回動中心,10A,11A,12A,11B,12B:チャック部,
13:昇降機構,14:駆動部,
20:ピンチ機構,21:ピンチ部,22:カッター部,23:動作部,
30:取り出し装置,31:把持ハンド,31A:アクチュエータ,
32:支持アーム,33:移動機構,
33A:スライドガイド,33B:アクチュエータ,
50:ラベル保持部,51:吸着パッド,52:伸縮シリンダ,
P,P1:パリソン,P0:吐出中心,
S1:第1供給位置,S1:第2供給位置,W:成形物(ボトル),
La,Lb:ラベル束,L1a,L1b:ラベル
Claims (13)
- パリソンを吐出するダイヘッドと、
吐出されたパリソンを設定長さで切り離して搬送するパリソン供給部と、
供給されたパリソンをブロー金型で挟み込みブロー成形を行うブロー成形部とを備え、
前記パリソン供給部は、前記ダイヘッドの吐出中心に対して左右の一方側に設定される第1供給位置と、前記吐出中心に対して左右の他方側に設定される第2供給位置に、切り離されたパリソンを交互に搬送するピックアップチャックを備え、
前記ブロー成形部は、前記第1供給位置と前記第2供給位置のそれぞれに配置したブロー金型により、供給されたパリソンをブロー成形することを特徴とするブロー成形装置。 - 前記ブロー成形部は、
前記第1供給位置と前記第2供給位置のそれぞれに配置した前記ブロー金型へのエアブローが、一方に配置したブロー金型へのパリソンの供給前に開始されることを特徴とする請求項1記載のブロー成形装置。 - 前記第1供給位置に第1のブロー金型と第3のブロー金型を、前記第2供給位置に第2のブロー金型と第4のブロー金型をそれぞれ配置し、
前記第1供給位置からブロー金型を退避させ、前記第1供給位置にブロー金型を移動する金型移動機構を備え、
前記第2供給位置からブロー金型を退避させ、前記第2供給位置にブロー金型を移動する金型移動機構を備えることを特徴とする請求項1又は2記載のブロー成形装置。 - 前記ピックアップチャックは、一端側でパリソンを掴み、他端側に設けた回動中心の回りを回動することで、前記第1供給位置と前記第2供給位置にパリソンを搬送することを特徴とする請求項1~3のいずれか1項に記載のブロー成形装置。
- 前記ピックアップチャックは、前記回動中心の回りに設定角度を開けて設けられる第1ピックアップチャックと第2ピックアップチャックを備え、前記第1ピックアップチャックの一端側が前記第1供給位置に移動した状態で、前記第2ピックアップチャックの一端側が前記吐出中心に位置し、前記第2ピックアップチャックの一端側が前記第2供給位置に移動した状態で、前記第1ピックアップチャックの一端側が前記吐出中心に位置することを特徴とする請求項4記載のブロー成形装置。
- 前記ピックアップチャックは、上下一対備えられ、上側ピックアップチャックは、パリソンを開口した状態で掴み、下側ピックアップチャックは、パリソンを潰した状態で掴むことを特徴とする請求項1~5のいずれか1項記載のブロー成形装置。
- 前記パリソン供給部は、前記ピックアップチャックのチャック位置の上方でパリソンを保持し、吐出されるパリソンを引張ながら下方に移動して、所定のタイミングでパリソンを切断する動作を繰り返すピンチ機構を備えることを特徴とする請求項1~6のいずれか1項記載のブロー成形装置。
- 前記ピックアップチャックは、下向きに移動しながら、下向きに吐出されるパリソンを掴むことを特徴とする請求項1~7のいずれか1項に記載のブロー成形装置。
- 前記ブロー金型から成形物を取り出す取り出し装置を備え、前記取り出し装置は、前記ブロー金型から突出する成形物の一部を把持する把持ハンドと、前記把持ハンドを支持する支持アームと、前記支持アームを前記ブロー金型に対して近接・離間させる移動機構と、前記支持アームに支持され、前記ブロー金型内に挿入するラベルを保持するラベル保持部とを備えることを特徴とする請求項1~8のいずれか1項に記載のブロー成形装置。
- ダイヘッドから吐出されたパリソンを設定長さで切り離して搬送するパリソン供給工程と、
供給されたパリソンをブロー金型によりブロー成形するブロー成形工程とを有し、
前記パリソン供給工程は、前記ダイヘッドの吐出中心に対して左右の一方側に設定される第1供給位置と、前記吐出中心に対して左右の他方側に設定される第2供給位置に、前記ダイヘッドから吐出されたパリソンを交互に搬送し、
前記ブロー成形工程は、前記第1供給位置と前記第2供給位置のそれぞれに配置したブロー金型にて行われることを特徴とするブロー成形方法。 - 前記ブロー成形工程では、
前記第1供給位置と前記第2供給位置のそれぞれに配置したブロー金型へのエアブローが、一方に配置したブロー金型へのパリソンの供給前に開始されることを特徴とする請求項10記載のブロー成形方法。 - 前記第1供給位置にて第1のブロー金型と第3のブロー金型にパリソンを供給するパリソン供給工程を経て、前記第1供給位置からブロー金型を退避させ、前記第1供給位置にブロー金型を移動し、
前記第2供給位置にて第2のブロー金型と第4のブロー金型にパリソンを供給するパリソン供給工程を経て、前記第2供給位置からブロー金型を退避させ、前記第2供給位置にブロー金型を移動することを特徴とする請求項10又は11記載のブロー成形方法。 - 前記ブロー金型の型開き前に成形物を把持し、前記ブロー金型の型開き後に、前記成形物を把持した状態で移動してラベルをブロー金型間に移動させ、前記ラベルをブロー金型内に挿入することを特徴とする請求項10~12のいずれかに1項に記載のブロー成形方法。
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US16/075,351 US20190039278A1 (en) | 2016-02-04 | 2017-01-31 | Blow molding apparatus and blow molding method |
CN201780005247.4A CN108472856B (zh) | 2016-02-04 | 2017-01-31 | 吹塑成型装置及吹塑成型方法 |
EP17747398.0A EP3412426A4 (en) | 2016-02-04 | 2017-01-31 | BLOWING DEVICE AND BLOWING PROCESS |
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JP6801141B1 (ja) * | 2020-08-27 | 2020-12-16 | 徹夫 関根 | 中空成形機 |
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EP3412426A4 (en) | 2019-10-30 |
EP3412426A1 (en) | 2018-12-12 |
US20190039278A1 (en) | 2019-02-07 |
KR102017185B1 (ko) | 2019-09-02 |
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