JP2019064006A - Method of producing hollow container - Google Patents

Abstract

To provide a method of producing a hollow container by blow molding, the method being capable of appropriately removing a burr formed around a flow channel.SOLUTION: A method of producing a hollow container 1 of this invention, which includes a main body 11, a port part 12, and a cover part 13 tapering off and continuous to the port part 12, comprises a blow molding step, a separation step, and a sealing step. In the blow molding step, a pressure fluid is introduced into a parison arranged in a mold; the mold includes a container molding section and a connection member molding section connected to a part where a cover part 13 of the container molding section is formed; and the pressure fluid is introduced into the parison by having an injection nozzle pierced into the connection member molding section. In the separation step, the cover part 13 and a connection member 15 are separated from one another by being cut by a tabular cutting member 35; and the tabular cutting member 35 includes a cutting section for cutting the flow channel connecting the cover part 13 and the connection member 15, and a pressing section for pressing a burr. In the sealing step, the cut flow channel is sealed.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method of manufacturing a hollow container formed by a blow molding machine.

  Conventionally, in order to prevent contamination and contamination, a hollow container transported in a sealed state until just before the filling of contents is used. As a method for manufacturing such a sealed hollow container, for example, Patent Document 1 discloses a method for forming a sealed state by sealing a blow-in port (flow passage) in direct blow molding. It is done.

Patent document 1: JP-A-2004-291571

  By the way, when sealing a flow path like patent document 1, in order to perform sealing simply and reliably, the one where the diameter of a sealing port is smaller is preferable. However, if the diameter of the sealing port is reduced in direct blow molding, burrs will be generated around the sealing port, and if burrs remain, this will cause sealing failure and the operation of removing the burrs will be complicated. turn into.

  The present invention has been made in view of such circumstances, and provides a method of manufacturing a hollow container capable of appropriately removing burrs formed around a flow passage.

  According to the present invention, there is provided a method of manufacturing a hollow container provided with a main body, a mouth, and a tapered cover continuous with the mouth, the method comprising a blow molding step, a separation step, a sealing step, In the blow molding step, the pressurized fluid is introduced into the parison disposed in the mold of the split type, and the mold forms the container body forming the body portion, the mouth portion and the cover portion. And a connecting member forming portion for forming a connecting member connected to a portion forming the cover portion of the container forming portion, and the pressurized fluid pierces the blowout nozzle in the connecting member forming portion. In the parison, and in the separating step, the tapered cover and the connecting member are cut and separated by the plate-shaped cutting member, and the plate-shaped cutting member is at one end side thereof, The tapered cover portion and the connection A hollow portion for cutting the flow passage which is cut in the sealing step, and a cutting portion for cutting the flow passage connecting the members and a pressing portion for pressing the burr formed around the flow passage; A method of manufacturing a container is provided.

  According to the present invention, the cutting portion of the cutting member cuts the flow passage, and the pressing portion presses the burr formed around the flow passage to separate the burr from the hollow container, so the burr is properly removed. It has become possible.

  Preferably, the pressing portion is formed adjacent to both sides of the cutting portion.

  Preferably, a tip portion of the pressing portion is configured to press the burr before the cutting portion abuts on the flow passage.

  Preferably, the end surface on the one end side of the cutting portion is formed to be V-shaped in a side view.

  Preferably, the end surface on the one end side of the cutting member is formed to have an M shape in a side view.

  Preferably, in the blow molding step, the hollow container and the connecting member forming portion are alternately connected by a rotary blow molding machine provided with a plurality of mold units including the container forming portion and the connecting member forming portion. Forming a chained hollow molded article, wherein in the separating step, the chained hollow is formed by a rotary separating device including a rotating disc and a plurality of separating units provided along the outer periphery of the rotating disc and having the cutting member The articles are separated continuously.

  Preferably, the separation unit includes a restriction member that restricts the hollow container from moving outward in the radial direction of the rotary disk, and the cutting member moves outward in the radial direction to flow the flow path. Is configured to cut.

It is a whole block diagram of the manufacturing apparatus which enforces the manufacturing method concerning this invention. It is an expanded view which shows the metal mold | die of the rotary blow molding machine with which the manufacturing apparatus of FIG. 1 is provided. It is a top view of the chain-like hollow molded article shape | molded by the rotary blow molding machine of FIG. It is a side view of the chain top hollow molded article of FIG. It is a side view which shows the rotary isolation | separation apparatus with which the manufacturing apparatus of FIG. 1 is provided. It is a top view which shows the state before holding a hollow molded article of the rotary isolation | separation apparatus of FIG. It is a top view which shows the state which hold | maintained the hollow molded article of the rotary isolation | separation apparatus of FIG. It is a front view which shows the cutting member of the rotary isolation | separation apparatus of FIG. It is a figure which shows the sealing apparatus with which the manufacturing apparatus of FIG. 1 is provided. 10A to 10D are front views showing cutting members of a rotary separation device according to a modification of the present invention, respectively.

  Hereinafter, embodiments of the present invention will be described. The various features shown in the embodiments described below can be combined with one another. In addition, the invention is established independently for each feature.

  The method of manufacturing the hollow container 1 according to the embodiment of the present invention is implemented by a manufacturing apparatus 5 provided with a rotary blow molding machine 2, a rotary separating device 3 and a sealing device 4 as shown in FIG. In the present invention, as shown in FIG. 3 and FIG. 4, the hollow container 1 to be manufactured has a shape provided with a main body 11, a mouth 12, and a tapered cover 13 continuous with the mouth 12. The flow passage 14 formed at the tip of the cover 13 is sealed and sealed. In the hollow container 1, first, the chain-like hollow molded article 10 is formed by the rotary blow molding machine 2, and the chain-like hollow molded article 10 is separated into the individual hollow containers 1 by the rotary separating device 3. The flow passage 14 is sealed by the sealing device 4. Hereinafter, first, the configuration of each device will be described, and then, a method of manufacturing the hollow container 1 using these devices will be described in detail.

  In addition, the arrow of the dashed-two dotted line in FIG. 1 shows the advancing direction of the hollow container 1, and let the advancing direction of this hollow container 1 be a front direction in the following description. Further, the radially outer side of the rotary disc 20 of the rotary blow molding machine 2 and the outer side of the rotary disc 30 of the rotary separating device 3 are referred to as the upper direction, and the direction perpendicular to the forward direction and the upper direction is the side.

  As shown in FIG. 1, the rotary blow molding machine 2 includes a rotary disc 20 which is rotated about a horizontal rotational axis by rotary drive means (not shown), and a plurality of the rotary blow molding machine A set of divided molds 21 is provided. The rotary blow molding machine 2 pours the parison 23 extruded by the extrusion head 22 into the mold 21 and sequentially closes the mold 21 to introduce pressurized fluid into the parison 23 and expand it along the cavity 24. After that, by performing mold opening, the continuous hollow molded article 10 to which the hollow containers 1 are connected is continuously molded.

  Here, the chain-like hollow molded article 10 is formed by alternately connecting a plurality of hollow containers 1 and a connecting member 15 (see FIG. 3) into which a pressurized fluid is blown. The connection member 15 is a rectangular parallelepiped blowout portion formed to pierce the blowout nozzle from the side and distribute pressurized fluid to the flow passage 14 of the adjacent hollow container 1 (right side in FIGS. 2 and 3) by piercing the blowoff nozzle. It is comprised by 15a and the thin-plate shaped connection part 15b connected with the other hollow container 1 (left side in FIG.2 and FIG.3). In addition, if the blow nozzle is pierced directly into the cover portion 13 to perform blow-in, there is a risk that debris (foreign matter) when the pin is pierced may intrude into the container. However, in the configuration of the present embodiment, the pressurized fluid is blown in through the blowing portion 15a which is removed in a later step, and the space of the blowing and the hollow container 1 are separated, so the intrusion of foreign matter is prevented. It is possible to Thus, there is also the purpose of separating the space, and the diameter of the flow passage 14 is reduced.

  The mold 21 is provided with a cavity 24 and an introduction groove 25 for introducing a pressurized fluid into the cavity 24 as shown in FIG. 2 in order to form the chained hollow molded article 10 as described above. The cavity 24 includes a container forming portion 26 forming the main body 11, the opening 12 and the cover 13 of the hollow container 1, a connecting member forming portion 27 forming the connecting member 15, and a flow passage 14 at the tip of the cover 13. And a flow passage forming portion 28 to be formed. In the present embodiment, the diameter of the flow passage forming portion 28 is smaller than the diameter of the portion forming the opening 12, and specifically, it is 1/2 or less of the diameter of the portion forming the opening 12. ing. Preferably, the diameter of the flow passage forming portion 28 is 1/3 or less, more preferably 1/4 or less of the diameter of the portion for forming the opening 12. Further, the diameter of the flow passage molding portion 28 is 15 mm or less, preferably 10 mm or less, more preferably 5 mm or less. Here, the diameter of the flow passage forming portion 28 corresponds to the outer diameter of the flow passage 14, and the diameter of the portion forming the opening 12 corresponds to the outer diameter of the opening 12 after cutting the cover 13. . Further, the connecting member forming portion 27 includes a blowout portion forming portion 27a forming the blowing portion 15a and a connecting portion forming portion 27b forming the connecting portion 15b. In the present embodiment, one container forming portion 26 and one connecting member forming portion 27 are formed in each mold 21 of the rotary blow molding machine 2, and the container forming portion 26 and the connecting member forming portion 27 are hollow. The bottom seal molding portion 29 that forms the bottom seal portion 11 a of the bottom surface of the container 1 is disposed to be separated. Then, the pressurized fluid introduced into the connecting member forming portion 27 of one die 21 does not flow to the container forming portion 26 of the same die 21, but through the flow passage forming portion 28 of the adjacent die 21. The container molding portion 26 of the adjacent mold 21 is blown. However, the hollow container 1 and the connecting member 15 communicating with each other in one mold 21 may be formed.

  Next, as shown in FIG. 1, the rotary separation device 3 is disposed at equal intervals on the rotary disc 30 that rotates around a horizontal rotation axis by rotational drive means (not shown) and on the outer peripheral surface of the rotary disc 30. A plurality of separation units 31 are provided. The rotary separation device 3 cuts off the connecting member 15 connecting the adjacent hollow containers 1 in the chain-like hollow molded article 10 sequentially by a plurality of separation units 31 and separates the hollow containers 1 and then performs predetermined rotation parts. And the hollow container 1 is discharged to the sealing device 4.

  As shown in FIGS. 5 to 7, the separation unit 31 includes a lower holding base 32, a cover holding base 33, a main body holding member 34, a cutting member 35, a connection member pressing mechanism 36, and a cover holding And a mechanism 37.

  The lower holding table 32 holds the lower portion of the main body 11 of the hollow container 1 and mounts the mounting portion 32 a on which the lower end of the hollow container 1 is mounted, and the suction unit 32 b vacuum suctions the hollow container 1. Prepare. The lower support 32 is configured to operate upward when discharging the hollow container 1 to the sealing device 4.

  The cover holding stand 33 is a member which is disposed in front of the lower holding stand 32 (on the left side in FIGS. 5 to 7) and holds the cover 13 of the hollow container 1 by means of an upwardly extending projection 33a.

  The main body holding member 34 includes a plate-like member 34a disposed on the cover holding base 33, and holding pieces 34b extending upward from the respective plate-like members 34a. It is a member for holding, and is operable between the non-holding position shown in FIG. 6 and the holding position shown in FIG.

  The cutting member 35 is a plate-like member for cutting the flow passage 14 at the tip of the hollow container 1, and as shown in FIGS. 8A and 8B, the cover 13 of the hollow container 1 and the connecting member 15 And a pressing portion 35 b for pressing without cutting the burrs 14 b formed around the flow passage 14. In the present embodiment, the cutting portion 35a is a single-edged blade (see FIG. 5), and the V-shaped side view (front view in FIGS. 8A and 8B) is located below the pair of tip portions 35t of the pressing portion 35b. It is formed to be shaped. That is, the cutting portion 35a is formed at a position opposite to the cutting direction (the direction in which the cutting member 35 moves when cutting the flow passage 14) with respect to the tip portion 35t of the pressing portion 35b. The pressing portion 35b is formed adjacent to both sides of the cutting portion 35a, and is formed to be inclined downward from the tip portion 35t. The end face on one end side of the cutting member 35 is formed by the cutting part 35a and the pressing part 35b such that the side view (front view in FIGS. 8A and 8B) has an M shape.

  As shown in FIGS. 8A and 8B, the cutting member 35 moves upward by a driving unit (not shown) so that the cutting portion 35a cuts the flow passage 14 and the pressing portion 35b pushes up the burr 14b. It is configured. In the present embodiment, since the cutting portion 35a is formed at a position opposite to the cutting direction with respect to the pair of tip portions 35t of the pressing portion 35b, the position at which the hollow container 1 is mounted is somewhat Even in the case of misalignment or the case where the chain-like hollow molded body 10 flutters, the flow passage 14 can be cut appropriately. Further, since the tip portion 35t of the pressing portion 35b presses the burr 14b before the cutting portion 35a abuts on the flow passage 14, even if the position is shifted, the burr 14b is cut first. It is supposed that it will not be done.

  The connecting member pressing mechanism 36 is a mechanism positioned above the connecting member 15 to restrict the upward movement of the connecting member 15, and as shown in FIGS. 5 to 7, a pedestal 36a and a support 36b, An arm 36c and a pressing member 36d are provided. In the present embodiment, the pedestal 36 a is disposed to the side of the cover holder 33, and the support 36 b is configured to extend upward from the pedestal 36 a. The arm 36c is a member whose proximal end portion 36c1 is pivotally supported on the upper portion of the support 36b and extends forward, and its tip portion 36c2 is positioned above the connecting member 15 by forming an L shape in plan view It is supposed to be The pressing member 36d is a member that is attached to the distal end portion 36c2 of the arm 36c and holds the connecting member 15 to restrict the upward movement. As shown in FIG. 5, the pressing member 36 d is disposed on the front end pressing portion 36 d 1 disposed on the front end side of the connecting member 15 and on the rear end side of the connecting member 15 to hold the front end and the rear end of the connecting member 15. The rear end pressing portion 36d2 is provided, and the side view is U-shaped.

  The connecting member pressing mechanism 36 configured as described above rotates the arm 36c with respect to the column 36b by the driving means (not shown), thereby pressing the pressing member 36d in the non-pressing position shown in FIG. It is possible to move between the positions.

  The cover portion pressing mechanism 37 is a mechanism positioned above the cover portion 13 of the hollow container 1 to restrict the upward movement of the cover portion 13 as shown in FIGS. A cylindrical holding pin 37a extending in a vertical direction and a rectangular parallelepiped driving member 37b for holding the holding pin 37a are provided. The pressing pin 37a can be moved between the non-pressing position shown in FIGS. 6 and 8A and the pressing position shown in FIGS. 7 and 8B by driving the drive member 37b.

  Next, the sealing device 4 is a device for sealing the flow passage 14 which is a cut portion of the hollow container 1 separated by the rotary separating device 3 to seal the hollow container 1, and as shown in FIG. A panel 40, a plurality of sets of holding members 41, a plurality of hot air generating means 42, and a clamping means 43 are provided.

  The rotary disc 40 is a member intermittently rotated about a rotation axis in the vertical direction by rotational driving means (not shown), and is disposed adjacent to the rotary separation device 3 as shown in FIG.

  The holding member 41 is a member disposed at equal intervals on the outer peripheral surface of the rotary disc 40, and as shown in FIG. 9, includes a pair of holding members 41a. The holding member 41 is configured to catch the hollow container 1 released by the rotary separation device 3 at a predetermined rotation position in the direction in which the flow passage 14 is downward, and to convey the outer periphery of the rotary disc 40.

  The hot air generating means 42 is annularly disposed at a position opposite to the flow passage 14 of the hollow container 1 held by each holding member 41 below the holding member 41, and includes an outlet 42a for blowing the hot air. The hot air generating means 42 softens the flow passage 14 of each hollow container 1 to be conveyed by the hot air blown out from the blowout port 42 a.

  The pinching means 43 is disposed in place of the hot air generating means 42 at one of the positions where the hot air generating means 42 is disposed, and drives the pair of pinching members 43a and the pinching members 43a. And driving means 43b. The sandwiching means 43 seals the hollow vessel 1 sequentially by sandwiching the softened flow path 14 of each hollow vessel 1 to be transported with a pair of sandwiching members 43a. In FIG. 9, for convenience, the clamping member 43 a operates in the circumferential direction of the rotary disc 40 to clamp the flow passage 14, but in actuality, it is in the radial direction of the rotary disc 40. It is configured to be attached.

  Next, the manufacturing method of the hollow container 1 using said apparatus is demonstrated. In the present embodiment, the method of manufacturing the hollow container 1 includes a blow molding step, a separation step, and a sealing step (seal step).

<Blow molding process>
First, in the blow molding process, the rotary disc 20 of the rotary blow molding machine 2 is rotated, the parison 23 extruded by the extrusion head 22 is poured into the mold 21, the mold 21 is closed sequentially, and A pressurized fluid is introduced into the parison 23 via the blow nozzle. Then, the parison 23 expands along the cavity 24, and the hollow container 1 and the connecting member 15 are formed by the container forming portion 26 and the connecting member forming portion 27. Then, by performing mold opening thereafter, the chain-like hollow molded article 10 to which the hollow container 1 is connected is continuously molded.

  Thereafter, as shown in FIG. 1, the chained hollow molded article 10 conveyed from the rotary blow molding machine 2 is conveyed on the conveyance path 7 via the pulley 6 and disposed at the conveyance destination of the conveyance path 7. It is conveyed to the rotary separating device 3 via the pulley 8 and shifts to the separating step. Here, in the present embodiment, the connecting member forming portion 27 of the mold 21 includes the connecting portion forming portion 27 b, and the chain-like hollow molded article 10 to be formed is a hollow container 1 as shown in FIG. A thin plate-like connecting portion 15 b is provided between the bottom seal portion 11 a and the blow-in portion 15 a of the connecting member 15. Therefore, hinges 17a and 17b which can be bent are respectively formed between the bottom seal portion 11a and the connection portion 15b and between the blow-in portion 15a and the connection portion 15b. Thus, the chain-like hollow molded article 10 of the present embodiment is provided with two hinges 17a and 17b for each pair of the hollow container 1 and the connecting member 15, and there is no connecting portion 15b. Compared with the case of only connecting, it is possible to make the connecting angle per hinge loose and to disperse the force applied to the hinge (see FIG. 4). Such a configuration makes it possible to prevent the chained hollow molded article 10 from being torn during transportation.

  Further, in the present embodiment, the chain-like hollow molded article 10 conveyed from the rotary blow molding machine 2 is once conveyed on the conveyance path 7 and then enters the rotary separation device 3 so that the rotary separation is performed. Vibration (with a flutter) of the chain-like hollow molded product 10 conveyed to the device 3 is reduced, and it is possible to accurately arrange the hollow containers 1 in the separation units 31 of the rotary separation device 3. In addition, it is also possible to cool the chain-like hollow molded article 10 after blow molding by transporting on the transport path 7. By cooling the chain-like hollow molded article 10, the burrs 14b are easily peeled off at the time of separation in the next separation step. In addition, in the sealing step, if the hollow container 1 is sealed while the temperature is high, there is a possibility that the hollow container 1 may be dented or deformed by reduced pressure deformation, but such cooling is performed by cooling the chain-like hollow molded article 10 It is also possible to suppress such depressions and deformations. In addition, it is also possible to add a cooling process separately to the process of this embodiment.

  As in the present embodiment, the connecting portion 15b is provided between the hollow container 1 and the connecting member 15, and a plurality of hinges are provided, so that the dimensional width (height) of the hollow container 1 disposed to the rotary separating device 3 can be obtained. The restriction can be relaxed. That is, by changing the length of the connecting portion 15b, it is possible to use one rotary separation device 3 for a plurality of rotary blow molding machines 2 (a plurality of types of containers). Specifically, even if the height dimension of the hollow container 1 (that is, the dimension of the container molding portion 26 of the mold) is changed by, for example, ± 30%, the length of the connecting portion 15b is changed correspondingly. Thus, it is possible to use the same rotary separation device 3.

<Separation process>
Next, in the separation step, the rotary disk 30 of the rotary separation device 3 is rotated, and the hollow containers 1 of the chain-like hollow molded article 10 transported from the rotary blow molding machine 2 are arranged in the separation unit 31. At this time, the lower portion of the main body 11 of the hollow container 1 is placed on the lower holder 32, and the cover 13 is placed on the cover holder 33. Next, the main body 11 of the hollow container 1 is adsorbed by the adsorption means 32b, and the main body holding member 34 is moved from the non-holding position shown in FIG. 6 to the holding position shown in FIG. It is fixed to the unit 31.

  Next, the pressing member 36d of the connecting member pressing mechanism 36 is moved from the non-pressing position shown in FIG. 6 to the pressing position shown in FIG. 7 and the pressing pin 37a of the cover portion pressing mechanism 37 is shown in FIGS. The position is moved to the pressing position shown in FIGS. 7 and 8B. Then, by moving the cutting member 35 upward in this state, the flow passage 14 at the tip of the hollow container 1 is cut. The bottom seal portion 11a and the connecting portion 15b of the front hollow container 1 are torn by the front end pressing portion 36d1 of the pressing member 36d pressing the connecting portion 15b, and also between the front hollow container 1 and the connecting member 15 It is designed to be separated (see FIG. 5).

  By the way, in the present embodiment, the flow passage 14 is formed to have a diameter smaller than the diameter of the opening 12 so as to be easily sealed in the next sealing step. Therefore, since the diameter of the flow passage 14 is considerably smaller than the diameter of the parison 23, the burrs 14b are almost inevitably generated around the flow passage 14 (see FIG. 3), and the burrs 14b are shown in FIG. In addition, it extends from the periphery of the flow passage 14 along the outside of the cover portion 13. However, the shape of the burrs 14 b is not one formed by shaping on the mold, and there is variation among molded articles. Then, the burrs 14 b adhere to the flow passage 14 or the cover portion 13, and even after the flow passage 14 is cut, a part of the burrs 14 b cut to the hollow container 1 side may remain. In particular, when the burrs on both sides of the flow passage 14 are uneven, it is difficult to easily remove the smaller one.

  Therefore, in the cutting member 35 of the present embodiment, pressing portions 35 b for pressing the burrs 14 b are provided on both sides of the cutting portion 35 a for cutting the flow passage 14. In order to press the pressing portion 35b without cutting the burr 14b as described above, the burr 14b is peeled off from the flow passage 14 or the cover portion 13 which has been attached by a shearing force, and the burr 14b is formed on the hollow container 1 side. It does not survive.

  Thereafter, the hollow container 1 from which the connecting member 15 has been separated is lifted by moving the pressing pin 37a to the non-pressing position and raising the lower support 32 to release the suction of the suction means 32b. The rotation is used to discharge the holding member 41 of the adjacent sealing device 4.

<Sealing process>
Next, in the sealing step, as shown in FIG. 9, hot air is sequentially applied to the flow passage 14 of the hollow container 1 by the plurality of hot air generating means 42 to soften (melt) the flow passage 14. Then, the hollow container 1 is sealed by sandwiching the fused flow path 14 with the sandwiching member 43 a of the sandwiching means 43.

  The hollow container 1 which finished the sealing process is packed through an appropriate inspection process.

  According to the manufacturing method of the hollow container 1 as described above, the hollow container 1 in which the burrs 14 b are appropriately removed and sealed is manufactured.

The present invention can also be practiced in the following modes.
-In embodiment mentioned above, as shown to FIG. 8A, although the cutting member 35 was the structure which becomes M-shape in a side view, it is also possible to set it as another structure. Specifically, for example, as shown in FIG. 10A, the cutting portion 35a is V-shaped as in the above embodiment, and the pressing portion 35b is horizontal, or as shown in FIG. 10B, the cutting portion 35a is horizontal. And the pressing portion 35b can be inclined by setting the position below the pressing portion 35b. Further, as shown in FIG. 10C, a projection 35t is provided at the boundary between the cutting portion 35a and the pressing portion 35b, and as shown in FIG. 10D, the cutting portion 35a simply provided with a blade and the pressing portion 35b which can not be cut It is also possible to have a continuous and continuous configuration.
-In embodiment mentioned above, although the hollow container 1 was continuously formed by the rotary blow molding machine 2 and the rotary isolation | separation apparatus 3, it is set as the structure manufactured one by one with a single metal mold 21 one by one. It is possible. Also in this case, the blowing portion 15a for blowing the pressurized fluid is disposed adjacent to the flow passage. Also in this case, the cutting member 35 for cutting the hollow container 1 and the connecting member 15 preferably includes the cutting portion 35 a and the pressing portion 35 b which can not be cut.

1: Hollow container 2: Rotary blow molding machine 3: Rotary separating device 4: Sealing device 5: Manufacturing device 6, 8: Pulley 7: Transporting path 10: Chained hollow molded article 11: Body 11a: bottom seal portion 12: mouth portion 13: cover portion 14: flow passage 14b: burr 15: connecting member 15a: blow-in portion 15b: connecting portion 17a, 17b: hinge 20: Rotating disk, 21: mold, 22: extrusion head, 23: parison, 24: cavity, 25: introduction groove, 26: container forming portion, 27: connecting member forming portion, 27a: blow portion forming portion, 27b: connecting portion Forming part 28: Flow passage forming part 29: Bottom seal forming part 30: Rotary disk 31: Separation unit 32: Lower holding base 32a: Mounting part 32b: adsorption means 33: cover part holding base , 33a: projection, 34: main body Holding member, 34a: plate-like member, 34b: holding member, 35: cutting member, 35a: cutting portion, 35b: pressing portion, 35t: projection, 35t: tip portion, 36: coupling member pressing mechanism, 36a: pedestal, 36b Reference numeral 36c: Arm, 36c1: base end, 36c2: tip, 36d: pressing member, 36d1: front end pressing portion, 36d2: rear end pressing portion, 37: cover portion pressing mechanism, 37a: pressing pin, 37b: Drive member 40: Rotating disk 41: Holding member 41a: Holding member 42: Hot air generating means 42a: Air outlet, 43: Holding means 43a: Holding member 43b: Driving means

Claims (7)

A method of manufacturing a hollow container comprising a main body, a mouth, and a tapered cover continuous with the mouth, the method comprising the steps of:
A blow molding process, a separation process, and a sealing process,
In the blow molding process, pressurized fluid is introduced into a parison disposed in a split mold;
The mold is a connecting member for forming a connecting member to be connected to the container forming portion forming the body portion, the opening portion and the cover portion, and the portion forming the cover portion of the container forming portion. Equipped with
The pressurized fluid is introduced into the parison by piercing a blowout nozzle in the connecting member forming portion, and
In the separation step, the tapered cover and the connecting member are cut and separated by a plate-like cutting member;
The plate-like cutting member has at one end thereof a cutting portion for cutting a flow passage connecting the tapered cover portion and the connecting member, and a pressing portion for pressing a burr formed around the flow passage Equipped with
The manufacturing method of the hollow container which seals the cut | disconnected said flow path in the said sealing process.   The method for manufacturing a hollow container according to claim 1, wherein the pressing portion is formed adjacent to both sides of the cutting portion.   The manufacturing method of the hollow container of Claim 1 or Claim 2 which is comprised so that the front-end | tip part of the said press part may press the said burr | flash before the said cutting part contact | abuts to the said flow path.   The method for manufacturing a hollow container according to any one of claims 1 to 3, wherein the end face on the one end side of the cutting portion is formed to have a V shape in a side view.   The method for manufacturing a hollow container according to claim 4, wherein the end surface on the one end side of the cutting member is formed to have an M shape in a side view. In the blow molding step, a chain shape in which the hollow containers and the connecting member forming portions are alternately connected by a rotary blow molding machine provided with a plurality of mold units including the container forming portions and the connecting member forming portions. Molding a hollow molded article,
In the separation step, the chained hollow molded article is continuously separated by a rotary separation device provided with a rotary disc and a plurality of separation units provided along the outer periphery of the rotary disc and having the cutting member. The manufacturing method of the hollow container in any one of Claims 1-5. The separation unit includes a restricting member that restricts the hollow container from moving radially outward of the rotating disc.
The manufacturing method of the hollow container in any one of Claims 1-6 comprised so that the said cutting member may cut | disconnect the said flow path by moving toward the said radial direction outer side.