JP3569075B2 - Laminated blow container and method for forming air introduction hole in the container - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a laminated blow container in which an air introduction hole is perforated in a container mouth, and a method for forming an air introduction hole in the container.
[0002]
[Prior art]
It is conventionally well known that in a laminated peeling blow container having an outer layer and an inner layer which can be peeled off from the outer layer, an air introduction hole is formed in the outer layer. It is conventionally known to form an introduction hole in the outer layer of a portion by a melting means (for example, see JP-A-6-345069).
[0003]
[Problems to be solved by the invention]
The above prior art uses a material having a higher melting point than the outer layer as the resin material of the inner layer as a resin material of the laminated container, and melts the resin of the outer layer by a melting means having a temperature range higher than the melting point of the outer layer and lower than the melting point of the inner layer. Thus, an introduction hole is formed.
[0004]
Therefore, control means for adjusting the temperature of the melting means to a certain range is required, and it is extremely difficult to melt only the outer layer when the difference between the melting points of the resins in both layers is small. In addition, since a certain difference is required in the melting point, there is a limitation in selecting a resin used for the inner layer and the outer layer.
In addition, since the resin is melted by the melting means, the introduction hole cannot be formed into a predetermined shape, and post-processing is required in order to clean the hole.
[0005]
In order to solve the above problems, a method of forming an air introduction hole characterized by punching a punch cutter from the outside of a container mouth portion and cutting out an outer layer by leaving a thickness of an inner layer with a cutter blade is proposed. However, when piercing, the direction of the container must be regulated and positioned, and sometimes the position is shifted, so that the introduction hole is not pierced at right angles to the container.
An object of the present invention is to solve the above-mentioned problems, and to provide an improved method of forming an air introduction hole, and to provide a laminated blow-molded product and a laminated peeling container used in the method.
[0006]
[Means to solve the problem]
In order to achieve the above object, the present invention provides, as a laminated blow container, a laminated blow molded article comprising an outer layer and an inner layer detachable from the outer layer, wherein perforation of an air introduction hole on the outer periphery of a container mouth is provided. A configuration is adopted in which a flat surface is formed at the position, and a positioning step protruding from the bottom wall is formed on the container bottom along with a ridge for bottom sealing.
[0007]
As a method for piercing the air introduction hole, a laminated blow container including an outer layer having a flat surface formed at a position where the air introduction hole is pierced at the mouth of the container and an inner layer which can be peeled off from the outer layer is used. After positioning in the direction, a punch cutter is driven from outside the flat surface so as to be orthogonal to the flat surface, and the outer layer is cut out with the cutter blade leaving the thickness of the inner layer.
Further, as a laminated peeling blow container in which an air introduction hole is perforated, a flat surface is formed on a lower outer periphery of a container mouth portion, and an air introduction hole orthogonal to the flat surface is perforated in an outer layer of the container mouth portion, and A configuration is adopted in which a positioning projection protruding from the bottom wall is formed on the bottom together with a projection for bottom sealing.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a laminated peel blow container having an air introduction hole perforated therein according to the present invention will be described with reference to FIGS.
In the figure, A is a laminated peeling blow container having an outer layer 1 and an inner layer 2, which is composed of a container body 3, a mouth 4, and a bottom 5 and is formed by laminated blow molding.
The outer layer 1 is made of a high-density polyethylene resin to maintain the appearance of the container, and the inner layer 2 is made of a nylon resin and is an inner bag that is detachable and deformable from the outer layer.
[0009]
As shown in the figure, a screw 6 is engraved in the container opening 4, and a flat portion 7 is provided at a position where an air introduction hole is formed below the screw 6.
Reference numeral 8 denotes an air introduction hole formed in the outer layer perpendicular to the flat portion 7.
The air introduction hole 8 is formed in a laminated blow container formed by blow molding by a method described later. The flat portion 7 facilitates the perforation, and the introduction hole is perpendicular to the outer periphery of the container opening. Let it be finished accurately.
Reference numeral 9 denotes an engagement portion of the inner layer formed by the air blowing member during blow molding.
[0010]
On the bottom part 5 of the container, there are formed bottom sealing ridges 11 which are formed by a pinch-off part of a mold at the time of molding and are provided with a large number of alternately provided biting parts 10 which are press-fitted into opposing fusion layers. On one side of the ridge 11, a positioning step 12 is formed at a predetermined interval from the bottom wall 5a and having a height substantially equal to that of the ridge 11.
Since the container of the present invention has the ridge 11 provided with the biting portion 10 at the bottom 5 thereof, even a weakly adhesive resin such as nylon constituting the inner layer is firmly fused to the outer layer, The occurrence of slits due to delamination can be prevented, and hot water does not enter from the bottom of the container.
Further, since the positioning step 12 is formed on the bottom portion 5 at an interval together with the ridge 11, positioning jigs are inserted on both sides of the ridge 11, and drilling operation, printing operation and other operations are performed. In the station, the direction of the container can be regulated and positioned easily.
[0011]
Next, a method of forming the air introduction hole and an apparatus to be used will be described.
The laminated container formed by the blow molding machine is sent to a punching station via a transport path.
The piercing station is disposed in a cooling process section of the formed container, and piercing is performed when the blow-molded container is at a predetermined temperature state until returning to room temperature.
In the punching station, first, the conveyed container is positioned by regulating the direction of the container, and then is gripped by the holding member and transferred to the punching position, where the punching operation is performed.
[0012]
As shown in FIG. 4, the positioning device B for regulating the direction is arranged on the same surface as the work table 20, and is mounted on a mounting table 21 rotatably supported by a bearing, and is movable up and down with respect to the mounting table. It comprises a positioning jig 22 and a rotatable pressing member 23 for pressing the container mouth from above.
The positioning jig 22 has an arc-shaped joining surface 24 that engages with the bottom wall 5 a of the container, and a concave streak to be inserted into the protrusion 11 along a center line parallel to the chord 25. 26 are provided.
[0013]
When the container is transferred to the position of the mounting table 21, the pressing member 23 descends and presses the container against the mounting table.
Next, the mounting table is rotated at a low speed, the container is rotated, the positioning jig 22 is raised, and elastically contacts the ridge 11 and the step portion 12 of the container.
When the container rotates and the concave ridge 26 of the jig coincides with the position of the ridge 11, the jig rises and the concave ridge 26 and the ridge 11 are engaged, thereby acting to prevent the container from rotating.
At the same time, when the jig is raised, a clutch (not shown) between the mounting table and its driving source is disengaged, and the rotation of the mounting table is stopped.
Next, the container is gripped by the holding member 27, and the pressing member is raised to make the container movable.
The container is transferred to the piercing position by the holding member 27 and is maintained on the work table 20 in a positioned state.
[0014]
Next, a perforation device for the air introduction hole will be described with reference to FIG.
In the figure, C is a perforation device for forming an air introduction hole, which is mounted on a support base (not shown) capable of moving up and down and left and right on the machine base.
Reference numeral 30 denotes a support shaft attached to a support base (not shown), and a support member 31 is attached to a tip of the support shaft.
A support rod 32 hangs downward from the support member 31, and a cutter receiving base 33 is provided at a lower end of the support rod 32.
A sliding member 34 is mounted on the support shaft 30 so as to be non-rotatable and slidable left and right, and a supporting rod 35 is hung down on the sliding member 34.
A punch cutter 36 is provided at a lower end of the support rod 35 so as to face the cutter receiving base 33.
[0015]
The punch cutter 36 has a cylindrical cutter blade 37 formed at the tip, and a through hole 38 through which a cutout piece is led.
A female screw 39 is drilled at the base end side of the support rod 35, and a bolt 40 is screwed as a stopper member to the female screw 39 so that the female nut 39 is not loosened to a fixed position by a lock nut 41. It is fixed.
The tip 42 of the bolt abuts against the support rod 32 of the receiving member, and forms a gap t between the cutter blade 37 and a receiving surface 33 a serving as a reference of the receiving base 33.
The gap t can be adjusted by adjusting the screwing position of the bolt 40.
[0016]
An air cylinder (not shown) for moving the sliding member 34 left and right is mounted on the support base, and is connected to the sliding member 34 via a rod 43.
The sliding member 34 can be moved by the air cylinder between a standby position on the right side, which is a retracted position, and a drilling position where the tip 42 of the bolt 40 abuts on the support rod 32 of the receiving member. .
As the operating means, an appropriate transmitting means other than the air cylinder can be selected.
Further, in the above embodiment, the standby position and the perforation position of the sliding member 34 are regulated by the stopper member, but are regulated by controlling the operating range of the operating means without using the stopper member. Is also good.
[0017]
Next, the punching method will be described focusing on the operation of the punching device.
In the inoperative state of the punching device, the support stand is located above the movable container so that the molding container can move, and accordingly, the receiving member and the cutter member together with the support shaft 30 are also located above the container.
Further, the sliding member 34 is located at a standby position at a predetermined distance from the support member 31.
When the molding container is transferred and fixed at the piercing position, the support base moves relative to the blow container, and the support rod 32 attached to the support member 31 is inserted into the container opening, and the receiving base 33 is moved. Is disposed at a position in contact with the inner layer of the container.
At the same time, the cutter member attached to the sliding member 34 together with the support member 31 is also lowered, and the receiving table 33 and the cutter blade 37 of the punch cutter are located to face each other with the inner layer and the outer layer of the container opening interposed therebetween.
[0018]
Next, the sliding member 34 is moved in the X direction by the operating means, and the punch cutter 36 moves until the tip 42 of the bolt 40 hits the support rod 32.
At that time, first, the punch cutter 36 presses the inner layer of the container mouth against the receiving surface 33a of the cutter receiving base 33, and then the cutter blade 37 is pressed into the outer layer of the container mouth, leaving the inner layer. Is cut out, and an introduction hole 8 for introducing the atmosphere is formed between the inner layer and the outer layer.
When the piercing operation is completed, the sliding member 34 moves in the Y direction, returns to the standby position, and the support member 31 is moved in preparation for piercing the next container.
[0019]
For the delamination of the container, air is blown from the air introduction hole drilled in the next step and introduced between the inner layer and the outer layer.
At this time, since delamination occurs in the opening at the time of the perforation process, the delamination is easy, and the entire delamination can be performed by introducing a very small amount of air.
[0020]
【The invention's effect】
The present invention has the following effects because it is configured as described above.
Since a flat surface is formed at the perforated position of the air introduction hole on the outer periphery of the container mouth of the laminated blow container, the perforation of the air introduction hole is facilitated, and the introduction hole is accurately finished so as to be orthogonal to the outer periphery of the container mouth. It became so.
Since a trapezoidal positioning step protruding from the bottom wall is formed at the bottom of the container together with a ridge for sealing the bottom, the direction of the container can be regulated and positioned with a simple positioning jig.
As a result, the positioning operation can be easily performed in the air introduction hole punching step, the container surface printing step, and various other work stations.
[0021]
As a method of piercing the air introduction hole, a laminated blow container having a flat surface formed in the container mouth is used, and the container is positioned in a predetermined direction before piercing, so that the punch cutter is perpendicular to the container mouth. The air introduction hole perpendicular to the flat surface was able to be accurately drilled in the outer layer of the container mouth.
The introduction hole is formed in a predetermined shape by the cutter blade, and can be finely finished only by drilling, so that post-processing is not required.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a laminated peeling blow container having an introduction hole perforated according to the present invention.
FIG. 2 is a cross-sectional plan view taken along line AA of FIG.
FIG. 3 is a bottom view of the container.
FIG. 4 is a longitudinal sectional view of the positioning device.
FIG. 5 is a longitudinal sectional view of the punching device.
[Explanation of symbols]
Reference Signs List A laminated peeling blow container B positioning device C punching device 1 outer layer 2 inner layer 3 trunk 4 mouth 5 bottom 7 flat 8 air introduction hole 11 ridge 12 step 20 work table 21 mounting table 22 positioning jig 23 pressing Member 30 Support shaft 31 Support members 32, 35 Support rod 33 Cutter cradle 34 Sliding member 36 Punch cutter 37 Cutter blade 39 Female screw 40 Bolt 41 Lock nut

Claims (2)

A laminated blow-molded product comprising an outer layer and an inner layer releasable from the outer layer, wherein a flat surface is formed at the position of the air introduction hole on the outer periphery of the container mouth, and a protrusion for bottom sealing is formed on the container bottom. A laminated blow container characterized by forming a positioning step that protrudes from a bottom wall together with the strip. A laminated blow container comprising an outer layer having a flat surface formed at a position where the air introduction hole is formed in the container opening and an inner layer which can be peeled off from the outer layer is used. A method for forming an air introduction hole in a laminated peeling container, wherein a punch cutter is driven from outside the surface so as to be orthogonal to a flat surface, and the outer layer is cut out while leaving the thickness of the inner layer with a cutter blade.

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