JP4916752B2 - Tube container and method for forming container head - Google Patents

Description

  The present invention relates to a tube container, particularly a tube container in which a laminated aluminum sheet is welded to the inner surface of a head portion.

What formed the tube container with the aluminum foil is conventionally well-known, and the tube container which integrated the aluminum sheet | seat by the insert molding to the head part of the tube container, and was affixed on the inner surface of the head part is also conventionally known ( For example, see Patent Document 1).
JP-A-6-179462

In a tube container formed of a well-known aluminum foil, the spout is opened by piercing the opening protrusion provided on the cap.
Moreover, in the tube container of the said patent document 1, it did not cover to the spout of a head part with the aluminum sheet, and the means to open an aluminum sheet was unnecessary.

  However, when an aluminum sheet covering the spout is cut by a cutting member to form a large opening, there is a problem that the aluminum sheet at the cut end peels off and the opening cannot be formed accurately.

  An object of the present invention is to solve the above-mentioned problem, by bonding a shoulder pad formed of a laminated aluminum sheet over the entire inner peripheral surface of the head portion, and opening the shoulder pad with a cutting member to form a large spout An object of the present invention is to provide a tube container made possible.

In order to solve the above problems, the present invention is a tube container comprising a container body, a lower cap having an opening for opening a spout, and an upper cap as a tube container, wherein the container body includes a mouth tube portion and A head portion having a shoulder portion and a shoulder pad formed of a laminated aluminum sheet coated with a synthetic resin on the inner peripheral surface, and a sleeve bonded to the outer edge of the shoulder portion of the head portion. On the inner peripheral surface of the tube portion, a spout is formed and a protruding surface that regulates the upper end position of the shoulder pad is protruded. The shoulder pad has a lower end in contact with the inner periphery of the sleeve and a spout at the upper end. A cylindrical cutting member that has a severable upper surface that closes the inner periphery of the lower end thereof, and that the lower cap is screwed into the mouth tube portion, and the upper surface of the shoulder pad is cut at the inner peripheral edge of the upper wall to open the spout Adopting a configuration characterized by hanging

Also, as a method of forming the head part, the shoulder pad is attached to the mandrel so that the edge of the shoulder pad is joined to the inner surface of the sleeve, and a ring-shaped molten resin is extruded around the shoulder pad in the cavity of the mold. the head portion is formed by compression molding by pressing into a mold mandrel, the shoulder pads, causes welded to the head portion peripheral surface, to adopt a method characterized by integrating the head portion and the sleeve .

Since a shoulder pad made of a laminated aluminum sheet is inserted into the head portion of the tube container and integrally molded, the shoulder pad can be strongly bonded to the entire inner peripheral surface of the head portion.
As a result, the spout can be accurately formed by the cutting member.

Next, an embodiment of the tube container of the present invention will be described with reference to the drawings.
1 and 2, A is a container body, B is a lower cap provided with spout opening means, and C is an upper cap.

The container main body A includes a head portion 1 and a sleeve 2, and a shoulder pad 3 is bonded to the entire inner peripheral surface of the head portion 1.
The head portion 1 includes a mouth tube portion 5 in which a screw 4 is screwed, and a shoulder portion 7 in which a step portion 6 is provided, and a projecting surface 8 projects from an inner peripheral surface of the mouth tube portion 5. The projecting surface 8 forms a spout 9 and regulates the upper end position of the shoulder pad 3.

The shoulder pad 3 is formed of a laminated aluminum sheet 3a having both surfaces bonded to polyethylene, and adheres to the inner periphery of the head portion and seals the inside of the tube container.
The lower end of the sleeve 2 is sealed after the contents are stored, and forms the bottom of the tube container.

The lower cap B includes a side peripheral wall 10 and an upper wall 11, and the side peripheral wall 10 is screwed with a screw 12 that is screwed with the screw 4 of the mouth tube portion 5, and the lower end of the side peripheral wall 10 is A sealing band 13 or a circular ring spacer or the like provided continuously through a severable connecting piece is provided.
On the upper surface of the upper wall 11, a threaded cylinder 15 having a screw 14 on its outer periphery is erected, and a cylindrical cutting member 16 having a lower end inclined along the inner peripheral edge of the upper wall 11 is suspended. The upper end of the cutting member 16 is a circular opening 17.

The upper cap C includes a top wall 20 and a side peripheral wall 21, and the side peripheral wall 21 includes an upper peripheral wall 22 and a lower peripheral wall 23, and a screwed tube of the lower cap B is provided on the inner periphery of the lower peripheral wall 23. A screw 24 that is screwed into the 15 screws 14 is screwed.
A flange 26 of an opening / closing lid cylinder 25 is sandwiched between the upper peripheral wall 22 and the upper end of the screwed cylinder 15, and an opening / closing lid 27 is provided at the lower end of the cylinder 25. The support cylinder 28 is provided in a continuous manner.

Next, a method for forming the tube container of the present invention will be described.
First, a method for forming the container body A will be described.
The molding is performed by compression molding. The outline is that the shoulder pad 3 and the sleeve 2 are mounted on a mandrel, extruded from an extruder, and a molten resin in a ring shape is molded in a mold. A container body in which the head portion 1, the shoulder pad 3, and the sleeve 2 are integrated can be obtained.

  Prior to the formation of the container body A, the shoulder pad 3 is formed by pressing the laminated aluminum sheet 3a on a mold having the inner peripheral surface of the head portion 1, and the sleeve 2 is formed by extrusion as is well known. , Using a piece cut to a predetermined length.

  As shown in FIG. 3, the main part of the compression molding machine 30 includes an upper mold 31, a lower mold 33 including a core 32, and a mandrel 34, and a sleeve 2 is mounted around the mandrel 34. The shoulder pad 3 is attached to the tip.

In molding, first, the lower mold 33 is clamped to the upper mold 31, and a cavity 35 is formed by the upper mold 31 and the core 32. The cavity 35 is extruded from the extruder and formed into a ring shape. Molten resin 36 is inserted.
Next, the mandrel 34 is moved and inserted into the upper mold 31 to press the shoulder pad 3 against the core 32, and at the same time, the ring-shaped molten resin 36 is compressed, and as shown in FIG. The head portion 1 is formed according to the shape.
At that time, the shoulder pad 3 is welded to the inner peripheral surface of the head portion 1 by the molten resin 36, and the sleeve 2 is welded to the side edge of the head portion 1.

When the mandrel 34 is raised after the head portion 1 is cooled and solidified, the head portion 1 and the sleeve 2 into which the shoulder pad 3 is inserted are obtained.
Next, when the contents are stored and the ends of the sleeve 2 are bonded, the container body A storing the contents can be obtained.

  Next, when the lower cap B is attached to the container mouth tube portion 5 and the upper cap C is closed, the tube container of the present invention can be obtained as shown in FIG.

Next, the usage mode and operational effects of the tube container will be described.
In use, when the tab of the sealing band 13 is first pulled, the connecting piece is cut, and the sealing band 13 can be removed as shown in FIG.

Next, when the lower cap B is rotated, the lower cap B is lowered together with the upper cap C by the screwing of the screw 4 of the mouth tube portion 5 and the screw 12 of the inner periphery of the side peripheral wall 10, and the cutting member 16 of the lower cap B While rotating, it contacts the upper surface of the shoulder pad 3 and cuts the laminated aluminum sheet 3a.
When reaching the lowest lowered position, the spout 9 is opened along the protruding surface 8 of the laminated aluminum sheet 3a as shown in FIG.

  At that time, the laminated aluminum sheet 3a is coated with polyethylene and is welded to the molten resin of the head portion 1 in compression molding, so that the laminated aluminum sheet 3a is adhered to the inner peripheral surface of the head portion 1 including the lower surface of the protruding surface 8. Therefore, the spout 9 is accurately formed.

  In dispensing, when the upper cap C is opened, the contents can be poured out from the opening 17 formed by the upper end of the cutting member 16. When the upper cap C is closed, the opening 17 is opened by the opening / closing lid 27. Closed and can prevent leakage of contents and evaporation.

  When the use of the contents is finished, if the new container body containing the contents is replaced, the upper cap and the lower cap can be used as they are, so that resources can be saved.

  In the present invention, since a laminated aluminum sheet is inserted and integrated as a shoulder pad into the head portion of the tube container, the entire inner peripheral surface of the head portion can be welded, and the spout is attached by a cutting member attached to the lower cap. Can be accurately opened, so that it can be widely used as a head portion of a tube container regardless of the size of the spout.

It is a partial cross section elevation of this invention tube container. It is a partial cross section elevation when a sealing band is removed. It is explanatory drawing at the time of shaping | molding of a compression molding machine and a container main body. It is explanatory drawing of the container main body at the time of completion | finish of shaping | molding. It is a sectional elevation view explaining the time of cutting of a shoulder pad.

Explanation of symbols

A Container body B Lower cap C Upper cap 1 Head part 2 Sleeve 3 Shoulder pad 3a Laminated aluminum sheet 4, 12, 14, 24 Screw 5 Mouth tube part 6 Step part 7 Shoulder part 8 Projection part 9 Outlet 10 Side peripheral wall 11 Top Wall 13 Sealing strip 15 Screwed tube 16 Cutting member 17 Opening 20 Top wall 21 Side peripheral wall 22 Upper peripheral wall 23 Lower peripheral wall 25 Cylindrical body 26 Flange 27 Opening / closing lid 28 Supporting cylinder 30 Compression molding machine 31 Upper mold 32 Core 33 Lower mold 34 Mandrel 35 Cavity 36 Molten resin

Claims (2)

A tube container comprising a container body, a lower cap having an opening for opening a spout, and an upper cap,
The container body is composed of a mouth tube portion and a shoulder portion, a head portion having a shoulder pad formed of a laminated aluminum sheet coated with a synthetic resin on the inner peripheral surface, and a sleeve that is joined to an outer edge of the shoulder portion of the head portion. And
A projecting surface is formed on the inner peripheral surface of the mouth tube portion to form a spout and regulate the upper end position of the shoulder pad,
The shoulder pad has a severable upper surface that closes the inner periphery of the lower end of the spout at the upper end while the lower end is in contact with the inner periphery of the sleeve,
A tube container, wherein the lower cap is screwed into the mouth tube portion, and a cylindrical cutting member that cuts the upper surface of the shoulder pad and opens the spout at the inner peripheral edge of the upper wall. The shoulder pad is attached to the mandrel so that the edge of the shoulder pad is joined to the inner surface of the sleeve,
Extrude a ring-shaped molten resin around the shoulder pad in the cavity of the mold, press into the mold with a mandrel and form the head part by compression molding,
The method for forming a container body of a tube container according to claim 1 , wherein the shoulder pad is welded to the inner peripheral surface of the head part, and the head part and the sleeve are integrated.

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