JP3397464B2 - Dispensing device and its manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spouting device attached to a mouth tube of a container, and more particularly to a spouting device of a type that pulls an operating portion to open a spout when used. is there.

[0002]

2. Description of the Related Art This type of pouring device is made of resin. However, for a device to be installed in a container for containing contents requiring gas barrier properties, the pouring port of the pouring device is made of metal foil or the like. A means for closing with a gas barrier sheet is provided, and when the operating portion is pulled, the metal foil is removed together with the operating portion so that the spout is opened.

Japanese Utility Model Publication No. 5-31062 discloses a conventional pouring device of this type. In this dispensing device, an annular thin groove is formed in a mounting portion to be mounted on a container, a dispensing cylinder is erected outside the thin groove, and a gas barrier sheet is provided inside the dispensing cylinder and on the upper surface of the mounting portion. Are joined to each other, a leg portion penetrating the gas barrier sheet stands up from an attachment portion inside the thin groove, and a ring portion is continuously provided at an upper end of the leg portion.

In this pouring device, the ring portion is pulled to cut through the thin groove to open the pouring opening in the mounting portion, and at the same time, the gas barrier sheet joined to the upper surface of the mounting portion is removed. .

This publication also discloses a method of manufacturing the pouring device. According to this, a gas barrier sheet having a through hole is previously inserted into a mold to form a mounting portion and a pouring cylinder molding cavity on the lower and outer sides of the gas barrier sheet, and a leg portion and a ring portion on the upper side of the gas barrier sheet. A molding cavity is formed, the mounting cavity and the leg molding cavity are communicated with each other through the through holes of the gas barrier sheet, and the molten resin is injected into the mounting section and the spout tube molding cavity to melt the molten resin. The resin is injected into the cavity for molding the leg portion and the ring portion through the through hole of the gas barrier sheet, and the pouring device is integrally molded.

[0006]

In the case of the pouring device described in the above publication, the gas barrier sheet is located above the mounting portion, so if the portion corresponding to the spout is removed from the mounting portion, Accordingly, the gas barrier sheet can be surely removed.

However, there has been a drawback that a large force is required to cut through the thin groove of the mounting portion, and the operability is poor. Further, in the above-mentioned manufacturing method, the gas barrier sheet is provided with through holes in advance and the gas barrier sheet is set in the mold. However, unless the gas barrier sheet is accurately positioned in the mold, the cavity for forming the mounting portion is formed. And the leg forming cavity cannot be communicated.
Therefore, the positioning of the gas barrier sheet in the mold is very important, and a positioning mechanism for that is required, which complicates the structure of the manufacturing apparatus.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a pouring device capable of opening a pouring port with a small operating force and a manufacturing method thereof. .

[0009]

The present invention adopts the following means in order to solve the above problems. <Summary of the Present Invention> [Pourout Device] The pourout device of the present invention is a mounting part that has a spout and is attached to the mouth cylinder of a container, a gas barrier sheet that closes the spout, and this gas barrier sheet. In a resin-made spouting device having an operating part attached to and removing the gas barrier sheet by pulling the operating part to open a spout, the operating part is located inside the spout. A substrate portion which is arranged apart from the mounting portion and is attached to the back surface of the gas barrier sheet , and the gas barrier sheet is pierced from the substrate portion.
And a gripping portion that protrudes to the front side together with a broken piece formed by the operation portion, and the operating portion and the mounting portion are integrally molded ( (Corresponding to claim 1).

Further, the pouring device of the present invention is characterized in that, in the pouring device, a portion of the mounting portion surrounding the pouring port is attached to a surface of the gas barrier sheet. Yes (corresponding to claim 2). However, conversely, it is also possible to attach a part of the attachment portion surrounding the spout to the back surface of the gas barrier sheet.

[Manufacturing Method of Pour-Out Device] The manufacturing method of the pour-out device of the present invention is such that a gas barrier sheet is inserted between a male mold and a female mold and the mold is closed.
A first cavity for molding the substrate portion of the operation portion and a second cavity for molding the grip portion are separated from each other, and a third cavity for molding the mounting portion is provided outside the first cavity or the second cavity. One cavity or the second cavity and the third cavity are communicated with each other through a gate, and the pressure of the molten resin injected into the first cavity breaks the gas barrier sheet to inject the molten resin into the second cavity. And a method for manufacturing the pouring device (corresponding to claim 3).

Also, in the method for manufacturing a pouring device of the present invention, in the manufacturing method, the portion of the third cavity for molding the rim of the pouring outlet is located on the same side as the second cavity with respect to the gas barrier sheet. The method for manufacturing a pouring device is characterized by being provided in (1) (corresponding to claim 4). However, conversely, it is possible to provide the part of the third cavity for molding the rim of the spout on the same side as the first cavity with respect to the gas barrier sheet.

<Raw material of the present invention> In the pouring device of the present invention, the raw material of the mounting portion and the operating portion may be a resin such as polyethylene or polypropylene.
In addition, examples of the raw material of the gas barrier sheet include a metal foil of aluminum or the like and a metal foil of which both front and back surfaces are resin-coated.

<Applicability of the Present Invention> The present invention is suitable as a pouring device to be attached to a container for containing foods, cosmetics, medicines and the like.

[0015]

[Action]

<Operation of the present invention> In the pouring device of the present invention, when the grip portion of the operation portion is pulled, the substrate portion arranged below the gas barrier sheet is lifted, so that the gas barrier sheet can be sharply and reliably removed. You can

Since the base plate portion of the operating portion is provided separately from the mounting portion, a force sufficient to cut the gas barrier sheet is sufficient for opening the spout, and the operating force is small.

In the manufacturing method of the present invention, the molten resin injected into the first cavity breaks a part of the gas barrier sheet due to the pressure and flows into the second cavity. Third
Molten resin flows into the cavity from the first cavity or the second cavity through the gate.

Since it is not necessary to provide through holes in the gas barrier sheet to be inserted into the mold in advance, positioning of the gas barrier sheet in the mold becomes extremely easy. When the mold is opened after the molten resin has solidified, the resin in the gate adheres to one of the mounting portion and the operating portion and is separated from the other.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings of FIGS. <First Embodiment> FIG. 1 is a vertical sectional view of a pouring device according to a first embodiment of the present invention, and FIGS. 2 and 3 are views for explaining a manufacturing method thereof. First, the pouring device 1A will be described.

[Pour-out device] The pour-out device 1A includes a mounting part 10 to be mounted on a mouth cylinder (not shown) of a container, a gas barrier sheet 20, and an operating part 30. Mounting part 10
The operating portion 30 is formed of a resin such as polyethylene or polypropylene, and these are integrally molded at the same time by an injection molding method as described later.

In the mounting portion 10, an annular flange 12 projects inward from the inner peripheral surface of the lower portion of the tubular portion 11, the inside of the flange 12 opens as a spout 13, and from the outer surface of the tubular portion 11. An annular fitting flange portion 15 having an L-shaped cross section is configured to project outward.

The mounting portion 10 includes the cylindrical portion 11 and the fitting flange portion 1.
The mouth tube portion of the container is fitted between 5 and mounted on the container. The gas barrier sheet 20 is formed by coating both front and back surfaces of an aluminum foil with a resin compatible with the resin of the attachment portion 10 and the operation portion 30.
The gas barrier sheet 20 has a disk shape, and the outer peripheral edge thereof is embedded in the tubular portion 11, the outer peripheral upper surface is joined to the lower surface of the collar portion 12, and the gas barrier sheet 20 is attached to the attaching portion 10. ing.

The operation section 30 includes a circular substrate section 31 joined to the back surface of the gas barrier sheet 20, and an arm section 32 extends upward from the substrate section 31 through the gas barrier sheet 20 to the upper end of the arm section 32. Ring part 33 for finger hanging
Are connected to each other. Here, the arm portion 32 and the ring portion 33 form a grip portion. Substrate 31 is spout 1
It has a diameter slightly smaller than 3, and is arranged inside the spout 13.

Further, a tapered projection 16 projects upward from the upper surface of the flange portion 12 of the mounting portion 10, and the tip of the projection 16 extends close to the arm portion 32. The protrusion 16 is formed by solidifying resin injected into the gate 64 described later.

In this spouting device 1A, when the finger is put on the ring portion 33 of the operation portion 30 and pulled, the substrate portion 31 is pulled up, so that the gas barrier sheet 20 is spouted out.
The edges are sharply and reliably cut. Since the substrate portion 31 has a smaller diameter than the spout 13, the substrate portion 3
1 can smoothly pass through the spout 13.

In this way, the spout 1 1A is used for the spout 1
To open 3, the gas barrier sheet 20 need only have a force large enough to be torn, so that it can be opened easily with a small operating force.

It should be noted that the bonding force between the mounting portion 10 and the gas barrier sheet 20 is made small, and the outer peripheral portion of the gas barrier sheet 20 is peeled off from the mounting portion 10 when the operating portion 30 is pulled, so that the entire gas barrier sheet 20 is a substrate. It is also possible to remove it from the mounting portion 10 together with the portion 31.

[Manufacturing Method] Next, a manufacturing method of the pouring device 1A will be described. In the manufacturing method of the present invention, the gas barrier sheet 20 is inserted into the mold in advance, the mold is closed, and the pouring device 1A is manufactured by injection molding. Therefore, the gas barrier sheet 20 is previously cut into a circular shape having an appropriate size. However, the gas barrier sheet 20 is not provided with a through hole through which the arm portion 32 of the operation portion 30 penetrates.

FIG. 2 is a cross-sectional view of essential parts showing the mold closed state of the mold before injecting the molten resin. When the mold is closed, the gas barrier sheet 20 is sandwiched between the male molds 40 and 41 while being placed on the bottom of the female mold 50.

Since the gas barrier sheet 20 is a mere disc shape and its position in the circumferential direction with respect to the male dies 40, 41 and the female die 50 is not restricted, the gas barrier sheet 2
Positioning 0 is very easy.

Then, the female mold 50 and the gas barrier sheet 20.
Between the male mold 40 and the male mold 41, a first cavity 61 for molding the substrate 31 is provided between the male mold 40 and the male mold 40.
A second cavity 62 for molding the ring portion 33 is provided, and a third cavity 63 for molding the mounting portion 10 is provided between the female die 50 and the male die 41. The portion of the second cavity 62 that molds the arm portion 32 is
Only the gas barrier sheet 20 allows the first cavity 6
Separated from 1.

The inner diameter of the first cavity 61 is the third
The diameter of the cavity 63 is smaller than the inner diameter of the portion forming the collar portion 12, and is arranged inside the third cavity 63. Further, the male mold 41 is provided with a gate 64 that connects the second cavity 62 and the third cavity 63.
The cross section of the gate 64 gradually decreases from the third cavity 63 side toward the second cavity 62 side.

In this mold closed state, the spool 5 of the female mold 50
The molten resin 70 is injected into the first cavity 61 from 1.
Then, the molten resin 70 injected into the first cavity 61
With the pressure, breaks through the closed portion 21 that closes the connection portion with the second cavity 62 in the gas barrier sheet 20, and pushes the broken pieces into the second cavity 62 side.

As a result, the molten resin 70 flows from the first cavity 61 to the second cavity 62 as shown by the arrow in the figure.
Into the third cavity 63 through the gate 64.
Flow into.

The pressure of the molten resin 70 flowing into the first cavity 61 causes an upward force to act on the central portion of the gas barrier sheet 20, but the male die 40 is located above the region where this force acts. Since they are arranged, the gas barrier sheet 20 will not be deformed.

Further, due to the pressure of the molten resin 70 flowing from the gate 64 into the third cavity 63, a downward force acts on the outer peripheral portion of the gas barrier sheet 20, but a female force is present below the region where this force acts. Since the mold 50 is arranged,
The outer peripheral portion of the gas barrier sheet 20 will not be deformed.

From the gate 64 to the third cavity 6
The molten resin 70 that has flowed into the inside 3 is the gas barrier sheet 20.
Since the molten resin 70 flows toward the peripheral edge of the gas barrier sheet 20 while being pressed against the female mold 50, the molten resin 70 does not flip up the peripheral edge of the gas barrier sheet 20.

As a result, the gas barrier sheet 20 is held at the proper position during the injection and the solidification of the molten resin 70, and as a result, the gas barrier sheet 2 is held.
0 is attached to the proper position and posture, and the pouring device 1A
Can be manufactured.

As described above, the pouring device 1A to which the gas barrier sheet 20 is properly attached has an extremely high gas barrier property. Then, after the molten resin 70 is cooled and solidified, the male mold 4
When the molds 0 and 41 and the female mold 50 are opened, the resin that has flowed into the gate 64 and solidified becomes a protrusion 16 that breaks at the tip that is the joint portion with the arm portion 32 and adheres to the flange portion 12 of the mounting portion 10. In this state, the male mold 41 is pulled out to complete the pouring device 1A shown in FIG.

<Second Embodiment> FIG. 4 is a vertical sectional view of a pouring device according to a second embodiment of the present invention, and FIG. 5 is a view for explaining the manufacturing method thereof.

[Pouring Device] The pouring device 1 according to the second embodiment.
The difference between B and the pouring device 1A of the first embodiment is as follows.

In this pouring device 1B, an annular bottom portion 17 is connected to the lower portion of the tubular portion 11 of the mounting portion 10, a spout 13 is opened in the bottom portion 17, and a small diameter tubular portion 18 surrounding the spout 13 is provided from the bottom portion 17. It extends downward.

The substrate portion 31 of the operating portion 30 is arranged inside the small diameter tubular portion 18 of the mounting portion 10, and the upper surface of the substrate portion 31 and the upper surface of the bottom portion 17 of the mounting portion 10 are flush with each other. The outer peripheral portion of the gas barrier sheet 20 is the bottom portion 17 of the mounting portion 10.
Is bonded to the upper surface of.

A projection 34 projects downward from the bottom edge of the base plate portion 31 of the operation portion 30, and the tip thereof is the small diameter cylindrical portion 1.
8 extends close to the lower inner peripheral surface. The protrusion 34 is formed by solidifying resin injected into a gate 65, which will be described later, and has a tapered shape.

Since the other construction is the same as that of the pouring device 1A of the first embodiment, the same reference numerals are given to the same mode parts and the description thereof will be omitted. Also in the pouring device 1B of the second embodiment, the gas barrier sheet 20 is properly attached, so that the gas barrier property is extremely high.

Also in this spouting apparatus 1B, when the operating section 30 is pulled, the substrate section 31 is pulled up, so that the gas barrier sheet 20 is sharply and surely cut along the peripheral edge of the spout 13. Then, the spout 13 can be opened with a small operating force as in the case of the spouting device 1A.

Incidentally, also in the pouring device 1B of the second embodiment, it is possible to remove the entire gas barrier sheet 20 from the mounting portion 10.

[Manufacturing Method] Next, a manufacturing method of the pouring device 1B will be described. Also in the case of manufacturing the pouring device 1B, the point that the gas barrier sheet 20 is inserted into the mold in advance, the mold is closed, and the molding is performed by injection molding is the same as the case of the first embodiment.

Also in the case of the second embodiment, the gas barrier sheet 20 is previously cut into a circular shape having an appropriate size, and the gas barrier sheet 20 is not provided with a through hole through which the arm portion 32 penetrates.

FIG. 5 is a cross-sectional view of essential parts showing the mold closed state of the mold before the molten resin 70 is injected. When the mold is closed, the gas barrier sheet 20 is sandwiched between the male molds 52 and 53 and the male molds 42 and 43 while being placed on the female mold 52.

Since the gas barrier sheet 20 is a mere disc shape and its position in the circumferential direction with respect to the male dies 42 and 43 and the female dies 52 and 53 is not restricted, the gas barrier sheet 20 can be positioned. Very easy.

Then, the female mold 52 and the gas barrier sheet 20.
Between the male mold 42 and the male mold 43, a first cavity 61 for molding the substrate portion 31 is provided between the male mold 42 and the male mold 42.
A second cavity 62 for molding the ring portion 33 is provided, and a third cavity 63 for molding the mounting portion 10 is provided between the female die 53 and the female die 52 and the male die 43.

As in the case of the first embodiment, the portion of the second cavity 62 where the arm portion 32 is formed is formed only by the gas barrier sheet 20.
Separated from.

The inner diameter of the first cavity 61 is the third
The inner diameter of the cavity 63 is smaller than the inner diameter of the portion that forms the small-diameter tubular portion 18, and is arranged inside the third cavity 63. Further, the female mold 52 includes a first cavity 61 and a third cavity.
A gate 65 that connects the cavity 63 is provided. The cross section of the gate 65 is gradually reduced from the first cavity 61 side toward the third cavity 63 side.

In this mold closed state, the spool 5 of the female mold 52
The molten resin is injected into the first cavity 61 from No. 4. Then, as shown by the arrow in the figure, the molten resin flows from the first cavity 61 through the gate 65 into the third cavity 63.

At the same time, the molten resin injected into the first cavity 61 is pierced by the pressure at the closed portion 21 that closes the connection portion with the second cavity 62 in the gas barrier sheet 20, and the broken fragments are made into the second fragments. Push it into the cavity 62 side. As a result, the molten resin flows from the first cavity 61 into the second cavity 62 through the through hole.

The pressure of the molten resin flowing into the first cavity 61 exerts an upward force on the central portion of the gas barrier sheet 20, but the male mold 42 is arranged above the region where this force acts. Gas barrier sheet 2
0 does not change.

Further, due to the pressure of the molten resin flowing from the gate 65 into the third cavity 63, the gas barrier sheet 2
Although the upward force acts on the outer peripheral portion of 0, the outer peripheral portion of the gas barrier sheet 20 is not deformed because the male mold 43 is arranged above the region where this force acts.

From the gate 65 to the third cavity 6
The molten resin flowing into 3 flows toward the peripheral edge portion of the gas barrier sheet 20 while pressing the gas barrier sheet 20 against the male mold 43, so that the molten resin flows into the gas barrier sheet 2
There is no turning up of the 0 edge.

As a result, the gas barrier sheet 20 is held at the proper position during the injection and the solidification of the molten resin, and as a result, the gas barrier sheet 20 is poured out at the proper position and posture. The device 1B can be manufactured.

As described above, the pouring device 1B to which the gas barrier sheet 20 is properly attached has an extremely high gas barrier property. Then, after the molten resin is cooled and solidified, the male mold 42,
When the mold 43 and the female molds 52 and 53 are opened, the resin that has flowed into the gate 65 and solidified becomes the protrusions 34, and the small-diameter cylindrical portion 18
4 is completed, and the tip end, which is a joint portion with, is pulled out from the female die 52 while being attached to the substrate portion 31 of the operation portion 30, and the pouring device 1B shown in FIG. 4 is completed.

[0062]

As described above, according to the spouting device of the present invention, the operating force for opening the spout can be small, and the gas barrier sheet can be sharply and surely removed. That is an excellent effect.

Further, according to the manufacturing method of the present invention, when the gas barrier sheet is set in the mold, the gas barrier sheet can be positioned extremely easily, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a pouring device according to a first embodiment of the present invention.

FIG. 2 is a view for explaining the method of manufacturing the pouring device according to the first embodiment, and is a cross-sectional view of essential parts showing a state in which the mold is closed.

FIG. 3 is a diagram illustrating a method of manufacturing the pouring device according to the first embodiment, and is a cross-sectional view of relevant parts showing a state in which molten resin is injected.

FIG. 4 is a vertical sectional view of a pouring device according to a second embodiment of the present invention.

FIG. 5 is a view for explaining the method of manufacturing the pouring device according to the second embodiment, and is a cross-sectional view of relevant parts showing a state in which the mold is closed.

[Explanation of symbols]

1A, 1B dispensing device 10 Mounting part 13 outlet 20 gas barrier sheet 30 Operation part 31 board part 32 Arm (Grip) 33 Ring part (grip part) 40, 41, 42, 43 Male 50,52,53 female 61 First Cavity 62 Second Cavity 63 Third Cavity 64, 65 gates 70 Molten resin

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65D 47/36

Claims (4)

(57) [Claims] 1. A mounting part which has a spout and is attached to a mouth cylinder part of a container, and a gas barrier sheet which closes the spout,
In a resin-made pouring device having an operating part attached to this gas barrier sheet, and removing the gas barrier sheet by pulling the operating part to open a spout, the operating part is the spout. A substrate portion that is disposed inside the substrate and is separated from the attachment portion and attached to the back surface of the gas barrier sheet ; and a fragment formed by piercing the gas barrier sheet from the substrate portion.
A pouring device comprising: a grip portion projecting to the front side , and the operating portion and the mounting portion being integrally molded. 2. The pouring device according to claim 1, wherein a portion of the attachment portion that surrounds the spout is attached to the surface of the gas barrier sheet. 3. A gas barrier sheet is inserted between the male mold and the female mold, and the mold is closed.
A first cavity for molding the substrate portion of the operation portion and a second cavity for molding the grip portion are separated from each other, and a third cavity for molding the mounting portion is provided outside the first cavity or the second cavity. One cavity or the second cavity and the third cavity are communicated with each other through a gate, and the pressure of the molten resin injected into the first cavity breaks the gas barrier sheet to inject the molten resin into the second cavity. The method for manufacturing a pouring device according to claim 1. 4. The method of manufacturing a pouring device according to claim 3, wherein a portion of the third cavity for molding a rim portion of the pouring outlet is provided on the same side as the second cavity with respect to the gas barrier sheet. A method for manufacturing a pouring device, which is characterized in that