JPH05124662A - Manufacture of cork stopper - Google Patents

Abstract

PURPOSE:To increase the joint rigidity of a cork member and a grip member by a method wherein the cork member is provided with a circular hole for receiving an axial core, a plurality of vertical grooves are formed in the inner surface of this circular hole and the joint seat of the grip part is engaged with the inside of the circular hole and secured thereto with adhesive agent. CONSTITUTION:A circular hole 4 is formed in a predetermined depth in the one end 2 of a cork member 1 and closed at the other end 3 thereof. An external die (not shown) having the vertical raised ribs formed in a plurality of rows on the outer surface of a downwardly directed rod is inserted into the circular hole 4 to form a plurality of vertical grooves 9 in the inner surface 8 of the circular hole. An adhesive agent 11 is dropped on a bottom part 10 inside the circular hole 4 and an axial core 13 of a grip part 12 is thereafter inserted into the circular hole 4 to allow the adhesive agent 11 to flow upwards through the vertical grooves, into the one end 2 of the cork member 1 in contact with a joint seat 14 of the grip part 12. Undergoing the above-mentioned processes, the grip part 12 provided with the axial core is joined to the cork member 1. Natural cork or compressed cork material is used in the cork member 1 and the grip part 12 is made of glass, synthetic resin, wood or ceramic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a cork stopper in which a grip portion is adhered to a natural cork member or a compressed cork member.

[0002]

2. Description of the Related Art In a cork plug to which a cork portion and a glass grip portion, a synthetic resin grip portion, a wooden grip portion, and a ceramic grip portion are bonded, the purpose is to reinforce the bonded cork portion and to position the cork portion and the grip portion. As a general example, there is one in which a shaft core is attached as indicated by reference numeral 13 to a central portion of an adhesive portion (hereinafter referred to as an adhesive seat) of the grip portion 12 indicated by reference numeral 14 in FIG. On the other hand, the shaft core 13 should be inserted into the part of the cork member 1 to which one end is attached as shown in FIG.
The adhesive seat 14 and the cork member 1 are adhered to each other by making a circular hole indicated by reference numeral 4. When adhering the cork member 1 and the grip portion 12, a predetermined amount of the adhesive 11 is dropped in the circular hole 4 shown in FIG.
And insert the shaft core 13 into the circular hole 4 so that the shaft core 13
It is supplied to the bonding seat 14 through the side surface of the cork member 1 and the cork member 1 and the grip portion 12 are bonded as shown in FIG.

Even if the diameters of the shaft core 13 and the circular hole 4 are appropriate, the shaft core 13 inserted from above with respect to the adhesive 11 in the circular hole 4 prevents the adhesive 11 from passing through. It acts as a stopper, trapping the adhesive 11 in the circular hole 4,
When it hardens, it rises. This phenomenon is more remarkable as the viscosity of the adhesive used is higher. In addition, in particular, when natural cork wood is used, it is generated in the growth stage as shown in FIG.
The adhesive 11 permeates the outside of the cork member 1 through the continuous groove 24 shown in, and if it is cured as it is, it becomes a defective product. This phenomenon is more remarkable as the viscosity of the adhesive used is lower.

Dropping the adhesive into the circular hole 4 in this manner causes inconveniences whether an adhesive having a high viscosity or an adhesive having a low viscosity is used. Making the diameter of the circular hole 4 of the cork member 1 larger than the diameter of the shaft core 13 is effective for the above-mentioned rising, and it has some effect on the seepage of the adhesive 11, but Due to the difference in diameter between the hole 4 and the shaft core 13, misalignment occurs, which makes fitting of the bottle and the cork plug inconvenient, and the adhesive supply to the adhesive seat is biased, resulting in more defective adhesion products than usual. ..

From the above, according to the present bonding method, the cork member 1 is rotated and the taper portion of the cork member 1 shown in FIG. The adhesive 11 is adjusted and applied to the inner surface of the circular hole, and the shaft core 13 is inserted into the circular hole 4 and adhered. As a result, the adhesion between the adhesive seat 14 and the cork member 1 is supplied by the inside of the cork member 1 in contact with the adhesive seat 14 of FIG. 14 and a part of the adhesive 11 of the taper portion 26, and the adhesion between the shaft core 13 is tapered. The adhesive 11 on the portion 26 and the inner surface 8 of the circular hole 4 is pushed in by the shaft core 13 and bonded.

However, when the manufacturing method is adopted as described above, there are the following problems. That is, the cork member
Although the adhesive 11 is applied to the inner side surface 8 of the circular hole 4 while rotating 1, the adhesive application unevenness occurs because the amount of adhesive applied is small. If there is coating unevenness, the adhesive agent 11 does not sufficiently flow to the adhesive seat 14 and the adhesive strength becomes insufficient. Also, round hole 4
Since an uncured adhesive is applied to the outside of the machine, the uncured adhesive that adheres to gloves, etc. due to the carelessness of the worker adheres to other cork parts and grips, and stains them to cause stain defects. ..
Also, because the difference between the shaft core diameter and the circular hole diameter is small, the shaft core 13
The adhesive is squeezed when it is inserted into 4, and the amount of adhesive remaining on the shaft core 13 is small and the adhesive strength is weak. In particular, since the natural cork member has the groove 24, it is easy for the adhesive to seep out on the side surface of the cork stopper.

Further, an air pocket shown by reference numeral 27 in FIG. 14 is formed, which weakens the plug strength and requires time and effort to adjust the coating position and the coating amount.

As one means for solving such a problem, there is one disclosed in Japanese Utility Model Laid-Open No. 2-63351. In the technique disclosed in this publication, when the cork stopper and the decorative umbrella portion having a plurality of vertical grooves formed around the shaft core are bonded to the upper surface of the cork stopper, the cork stopper and the decorative umbrella portion are The contact surface of the annular washer sandwiched between the contact surfaces with the cork plug portion is formed with an adhesive reservoir groove on one of the contact surfaces with the decorative umbrella portion.

[0009]

In the above-mentioned conventional technique, the adhesive is dropped into the shaft insertion hole of the cork stopper, and the washer having the above-mentioned shape is placed on the upper contact surface of the cork stopper.
When the mounting shaft of the decorative umbrella part is inserted into the insertion hole, the adhesive flows up through the gap between the multiple vertical grooves formed on the peripheral surface of the shaft and the inner wall of the insertion hole, and is attached to the inner wall surface of the insertion hole. While it adheres well to the shaft periphery and prevents air dripping and leaching from the groove, it cannot be prevented if the adhesive overflows from the insertion hole before the washer is pressed against the contact surface of the cork stopper. Not only does it flow out to the side surface of the cork stopper to cause stain defects, but also forming multiple vertical grooves around the shaft of the decorative umbrella complicates the structure of the decorative umbrella molding die. However, there is a problem in the manufacturing method that the groove width is fixed regardless of the material of the cork stopper and the viscosity of the adhesive always needs to be adjusted.

According to the present invention, in order to eliminate the above-mentioned problems, a circular hole for inserting a shaft in a cork member, and a contact surface between a plurality of vertical grooves and a grip portion adhesive seat on the inner surface of the circular hole. A groove to prevent the adhesive from flowing out is formed, and the adhesive dropped and injected into the bottom of the circular hole is flowed up in the vertical groove by inserting it into the circular hole of the shaft core, and it is also supplied to one end surface for adhesion. The purpose of the present invention is to eliminate the dirt caused by the adhesive, to enable firm adhesion between the grip portion and the cork member, and to manufacture at low cost.

[0011]

DISCLOSURE OF THE INVENTION An object of the present invention described above is to form a circular hole having a constant depth in one end face of a cork member and not penetrating into the other end face, and a plurality of holes are formed on the outer face of the downward shaft rod in the circular hole. A first step of inserting an upper die having vertical ridges formed in a row and forming a vertical groove on the inner side surface of the circular hole, and dropping and injecting an adhesive to the inner bottom of the circular hole, and then the shaft core of the grip with a shaft core. The grip part with a shaft core is bonded to the cork member by the second step in which the adhesive is flown up in the vertical groove to flow out to one end face of the cork member in contact with the adhesive seat of the grip part. To do.

Further, in the first step, when the upper mold having a plurality of rows of vertical ridges formed on the outer surface of the shaft rod is inserted into the circular hole of the cork member, the cork member is housed in the lower mold cavity, This can be achieved by applying pressure and heating with a mold, and at the time of applying pressure and heating, a constituent resin thin film is attached to the outer peripheral surface of the cork member and the liquid contact surface.

[0013]

According to the cork stopper manufacturing method of the present invention, the natural or compressed cork member is provided with a circular hole into which the shaft core of the grip is inserted, and the cork member is provided on the outer surface of the downward shaft rod in a plurality of rows. While pressing and heating an upper mold having a raised strip and a lower mold having a cavity, a vertical groove is formed on the inner surface of the circular hole, and an adhesive oozes out on the contact surface of the cork member with the grip adhesion seat. The first step of forming a groove for preventing outflow, and after the adhesive is dripped and injected into the circular hole, the shaft core of the grip portion is inserted into the circular hole, and the adhesive is flown up in the vertical groove, The grip portion and the cork portion are joined together through the second step of supplying a flow into the inside of the groove on the surface abutting on the adhesive seat.

Therefore, this cork stopper has a circular hole inner surface,
Adhesive spreads well around the shaft center and on the contact surface with the adhesive seat, firmly adheres, and it is possible to prevent both from coming off due to the force that acts during uncapping, and the adhesive seeps out and cork part The outer peripheral surface is not polluted to cause defective products.

[0015]

EXAMPLES Examples will be described with reference to the drawings. First, as shown in FIGS. 1 to 5, the basic method of the present invention is to form a circular hole 4 having a constant depth at one end surface 2 of a cork member 1 so as not to penetrate through the other end surface 3, and to the circular hole 4 there is a downward shaft rod. Inserting an upper die 7 having a plurality of rows of vertical ridges 6 on the outer surface of 5 and forming a vertical groove 9 on the inner surface 8 of the circular hole, and dropping adhesive 11 on the inner bottom 10 of the circular hole. After the injection, the shaft core 13 of the grip portion 12 with a shaft core is inserted into the circular hole 4, and the adhesive 11 is flown up in the vertical groove 9 to make contact with the adhesive seat 14 of the grip portion 12. By the second process of flowing out to the end face 2, the grip 12 with the shaft core
Is bonded to the cork member 1.

The method of manufacturing this cork stopper will be described in more detail with reference to FIGS. As shown in FIGS. 6 and 7, the upper mold 7 has a downward shaft rod 5 having a diameter which can be inserted into a circular hole 4 described later on the lower surface of the shaft rod holder 15 to which a shank (not shown) is connected.
A plurality of rows of vertical ridges 6 are formed at positions where the outer peripheral surface of the shaft rod 5 is divided at equal intervals.
An annular ridge 16 having a diameter slightly smaller than the diameter of a cork member 1, which will be described later, is formed concentrically with the shaft rod 5 on the lower surface of the.

As shown in FIGS. 8 and 9, the lower mold 17 has a cavity 18 into which a cork member 1 described later can be inserted and an air blowing hole 19 opened at the bottom of the cavity 18, and a heating means (not shown) is provided. It is configured so that it can be heated to a predetermined temperature. The cork member 1 used for the cork stopper may be either natural cork material or pressed cork material.
As shown in Figure 1, one end surface is a cylinder with the diameter required for a plug.
Drill a circular hole 4 with a diameter that allows the shaft core 13 of the grip 12 to be inserted at a depth that does not penetrate the other end surface 3 from 2, and make sure that the hole edge of this circular hole 4 and the edge of the other end surface 3 of the cork member 1 are It is chamfered 20,21. The synthetic resin thin film (polyethylene resin thin film) 22 is temporarily attached to the other end surface 3 of the cork member 1 thus preliminarily preliminarily processed by an appropriate means such as an adhesive or heat fusion.

Next, the first step of this method will be described. The pre-processed cork member 1 described above is placed in the cavity 18 of the lower mold 17 to form a tapered opening 23 at the cavity inlet.
Then, the synthetic resin thin film 22 is inserted so as to cover the side surface portion of the cork member 1 from the chamfer 21 portion, and the upper die 7 is moved downward. Upper mold
The shaft rod 5 is inserted into the circular hole 4 by the downward movement of 7, and the disc-shaped shaft rod holder 15 press-fits the cork member 1 into the cavity 18.
The mold is put in a press capable of heating and cooling, and is heated at a temperature of 130 ° C. to 170 ° C. for 3 to 5 minutes while being pressed. By this heating and pressing, the inner surface 8 of the circular hole 4 of the cork member 1
A vertical groove 9 is formed on the vertical ridge 6, and an adhesive flow prevention groove 23 is formed on the one end surface 2 by the annular ridge 16, and the synthetic resin thin film 22 is fused to the other end surface 3. After the heating time has elapsed, the mold is set to 60.
After cooling to ℃, remove from the press machine and raise the upper mold 7,
Pressurized air is blown into the cavity 18 through the air blowing hole 19 and the cork member 1 is taken out of the cavity 18. In this first step, the cork member shown in FIGS. 2, 3, 4 and 5 is completed.

Next, the second step will be described. A proper amount of adhesive 11 is dropped and injected into the inner bottom 10 of the circular hole 4 of the cork member 1 processed in the first step, and the shaft core 13 of the grip portion 12 is inserted into the circular hole 4.

As shown in FIG. 10, the vertical groove 9 is the inner bottom of the circular hole 4.
Since it is formed up to the vicinity not reaching 10, the gap formed between the shaft core 13 and the inner surface 8 of the circular hole 4 and the shaft core 13
The gap between the groove and the bottom of the vertical groove 9 causes an orifice effect, and the adhesive 11 flows into the vertical groove 9 and flows upward, reaching the one end face 2 of the cork member 1 and adhering on this face. It spreads inside the adhesive flow prevention groove 23 which becomes a chemical reservoir. This one face 2
The adhesive 11 rises and spreads over the limited area on the grip
Adhesion between the adhesive seat 14 of 12 and the one end face 2 of the cork member 1 can be sufficiently performed. Of course, the adhesive 11 that flows upward in the vertical groove 9 evenly adheres to the inner surface 8 of the circular hole 4, and the shaft core 13 and the inner surface 8 of the circular hole 4 can be sufficiently adhered. The outer surface of the member 1 is not soiled. Further, since the cork member 1 is heated and pressed and the side surface and the liquid contact surface are covered with the synthetic resin thin film 22, no seepage occurs.

[0021]

Since the present invention is configured as described above, it has the following effects. A vertical groove is formed on the inner surface of the circular hole of the cork member to be bonded in this way, an appropriate amount of adhesive is dropped and injected into the inner bottom of the circular hole, and if the shaft core of the grip is inserted, the adhesive will pass through the vertical groove. Since it is supplied to one end surface of the cork member, it is possible to prevent the adhesion from rising due to internal pressure and to prevent the adhesive from seeping out from the groove, and to prevent the adhesion and stain of the adhesive due to carelessness of the operator. The adjustment of the application position is not required, the cork member and the grip can be firmly adhered, and the two do not come off due to the force that acts during unplugging.

[Brief description of drawings]

FIG. 1 is a sectional view of a cork stopper completed by this method.

FIG. 2 is a front view of a cork member made in the first step of this method.

[FIG. 3] Similarly, a side view with a part cut away

FIG. 4 is a perspective view showing a state where the first step is added to the natural cork.

FIG. 5 is a perspective view showing a state where the first step is added to the compressed cork.

FIG. 6 is a bottom view of the upper die used in this method.

FIG. 7 is a sectional view taken along line AA of FIG.

FIG. 8 is a relationship diagram between the upper and lower molds and the cork member immediately before the first step is added to the cork member.

FIG. 9 is a cross-sectional view of the mold in a state where the first step is being added to the cork member.

FIG. 10 is an enlarged view showing a state in which the flow rate of the adhesive rises during bonding.

FIG. 11 is a cross-sectional view of a state in which an adhesive is dropped in a circular hole of a cork member by a conventional method.

FIG. 12 is a view showing a state in which the adhesive also seeps out from the groove.

FIG. 13 is a view showing a state in which an adhesive is applied to the circular hole and one end surface of the same.

FIG. 14 is a view showing a state in which an air pocket is also generated after the bonding.

[Explanation of symbols]

 1 Cork member 2 One end surface 3 The other end surface 4 Circular hole 5 Shaft rod 6 Vertical ridge 7 Upper die 8 Inner side surface 9 Vertical groove 10 Inner bottom 11 Adhesive 12 Grip 13 Shaft core 14 Adhesive seat

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[Procedure amendment]

[Submission date] September 18, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of the invention Method for producing cork stopper

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a cork stopper in which a grip portion is adhered to a natural cork member or a compressed cork member.

[0002]

BACKGROUND ART cork member and the glass grip portion, the synthetic resin grip portion, wooden grip portion, the bonded cork stoppered porcelain grip portion, adhered cork member reinforcing and cork member and grip portion of the For the purpose of positioning, generally, there is one in which a shaft core is attached as indicated by reference numeral 13 to a central portion of an adhesive portion (hereinafter referred to as an adhesive seat) of the grip portion 12 indicated by reference numeral 14 in FIG. On the other hand, the adhesive seat 14 and the cork member 1 are bonded to each other by making a circular hole 4 in FIG. When the cork member 1 and the grip portion 12 are bonded together, a predetermined amount of the adhesive 1 is applied to the circular hole 4 shown in FIG.
1 is dropped, the shaft core 13 is inserted, and the shaft core 13 is inserted into the circular hole 4 to pass through the side surface of the shaft core 13 from the circular hole 4 and the adhesive seat 14
Is supplied to the cork member 1 and the grip 12 as shown in FIG.
And are glued together.

Even if the diameters of the shaft core 13 and the circular hole 4 are appropriate, the glaze core 13 inserted from above with respect to the adhesive 11 in the circular hole 4 prevents the adhesive 11 from passing through. It acts as a stopper, trapping the adhesive 11 in the circular hole 4,
When the adhesive 11 is hardened, it is in a floating state. This phenomenon is more remarkable as the viscosity of the adhesive used is higher. Further, particularly when a natural cork material is used, if the adhesive 11 leaches out to the outside of the cork member 1 through the continuous groove 24 shown in FIG. In the state shown in the adhesive flow 25 of FIG. 12, the product solidifies and becomes a defective product. This phenomenon is more remarkable as the viscosity of the adhesive used is lower.

Dropping the adhesive in the circular hole 4 in this manner causes inconveniences whether an adhesive having a high viscosity or an adhesive having a low viscosity is used. Making the diameter of the circular hole 4 of the cork member 1 larger than the diameter of the shaft core 13 is effective for the above-mentioned floating and has some effect on the seepage of the adhesive 11, but There is a misalignment due to the difference in diameter between the hole 4 and the shaft core 13, which makes fitting the bottle and the cork plug inconvenient,
The adhesive supply to the adhesive seat is biased, resulting in more defective adhesives than usual.

From the above, according to the present bonding method, the taper portion indicated by the reference numeral 26 in the cork member 1 which comes into contact with the adhesive seat indicated by the reference numeral 14 in FIG. 13 while rotating the cork member 1 and the reference numeral 8. The adhesive 11 is applied to the inner surface of the circular hole while being adjusted, and the shaft core 13 is inserted into the circular hole 4 for adhesion. Thus, the adhesion between the adhesive seat 14 and the cork member 1 is part of the adhesive 11 of the cork member 1 of the inner and the tapered portion 26 in contact with the adhesive locus 14 of FIG. 1 3 is supplied, the shaft core 13
The adhesive 11 is adhered to the taper portion 26 and the inner surface 8 of the circular hole 4 by the adhesive 11 being pushed in by the shaft core 13.

[0006] However, when adopting the manufacturing method as described above, there are the following problems. That is, the adhesive 11 is applied to the inner side surface 8 of the circular hole 4 while the cork member 1 is rotated, but since the amount of adhesive applied is small, uneven application of the adhesive occurs. If there is coating unevenness, the adhesive 11 does not sufficiently squeeze onto the adhesive seat 14, resulting in insufficient adhesive strength. Also,
Since the uncured adhesive outside the circular hole 4 is applied, uncured adhesive adhered to the glove or the like by inadvertent worker attached to the other cork member and grip portion, contaminate these Poor dirt. Further, since the difference between the diameter of the shaft core and the diameter of the circular hole is small, the adhesive is squeezed when the shaft core 13 is inserted into the circular hole 4, the amount of the adhesive remaining on the shaft core 13 is small, and the adhesive strength is weak. In particular, since the natural cork member has the groove 24, it is easy for the adhesive to seep out on the side surface of the cork stopper.

Further, an air pocket shown by reference numeral 27 in FIG. 14 is formed to weaken the plug strength, and it takes time to adjust the coating position and the coating amount.

As one means for solving such a problem, there is one disclosed in Japanese Utility Model Laid-Open No. 2-63351. In the technique disclosed in this publication, when the cork stopper and the decorative umbrella portion having a plurality of vertical grooves formed around the shaft core are bonded to the upper surface of the cork stopper, the cork stopper and the decorative umbrella portion are is obtained by forming a reservoir groove of adhesive on one surface or abutment surface of the abutment surface or decorative umbrella portion of the cork portion of an annular washer which sandwiched therebetween.

[0009]

In the above-mentioned conventional technique, the adhesive is dropped into the shaft insertion hole of the cork stopper, and the washer having the above-mentioned shape is placed on the upper contact surface of the cork stopper.
When the mounting shaft of the decorative umbrella part is inserted into the insertion hole, the adhesive flows up through the gap between the multiple vertical grooves formed on the peripheral surface of the shaft and the inner wall of the insertion hole, and is attached to the inner wall surface of the insertion hole. While it adheres well to the shaft periphery and prevents air dripping and leaching from the groove, it cannot be prevented if the adhesive overflows from the insertion hole before the washer is pressed against the contact surface of the cork stopper. Not only does it flow out to the side surface of the cork stopper to cause stain defects, but also forming multiple vertical grooves around the shaft of the decorative umbrella complicates the structure of the decorative umbrella molding die. However, there is a problem in the manufacturing method that the groove width is fixed regardless of the material of the cork stopper and the viscosity of the adhesive always needs to be adjusted.

According to the present invention, in order to eliminate the above-mentioned problems, a circular hole for inserting a shaft in a cork member, and a contact surface between a plurality of vertical grooves and a grip portion adhesive seat on the inner surface of the circular hole. A groove to prevent the adhesive from flowing out is formed, and the adhesive dropped and injected into the bottom of the circular hole is flowed up in the vertical groove by inserting it into the circular hole of the shaft core, and it is also supplied to one end surface for adhesion. The purpose of the present invention is to eliminate the dirt caused by the adhesive, to enable firm adhesion between the grip portion and the cork member, and to manufacture at low cost.

[0011]

DISCLOSURE OF THE INVENTION An object of the present invention described above is to form a circular hole having a constant depth in one end face of a cork member and not penetrating into the other end face, and a plurality of holes are formed on the outer face of the downward shaft rod in the circular hole. A first step of inserting an upper die having vertical ridges formed in a row and forming a vertical groove on the inner side surface of the circular hole, and dropping and injecting an adhesive to the inner bottom of the circular hole, and then the shaft core of the grip with a shaft core. The grip part with a shaft core is bonded to the cork member by the second step in which the adhesive is flown up in the vertical groove to flow out to one end face of the cork member in contact with the adhesive seat of the grip part. To do.

Further, in the first step, when the upper mold having a plurality of rows of vertical ridges formed on the outer surface of the shaft rod is inserted into the circular hole of the cork member, the cork member is housed in the lower mold cavity, type as performed while pressurized and heated by, when the pressure heating, the synthetic resin film on the outer peripheral surface and the wetted surface of the cork member can be achieved by causing fusion bonding.

[0013]

The method for producing a cork stopper according to the present invention is a natural cork.
Member or squeezed cork member with a circular hole into which the shaft of the grip is inserted, and this cork member has a lower mold having a cavity and a cavity in which a plurality of rows of vertical ridges are formed on the outer surface of the downward shaft rod. A first step of forming a vertical groove on the inner side surface of the circular hole while pressurizing and heating with a groove, and forming a groove on the contact surface of the cork member with the grip adhesion seat to prevent the adhesive from seeping out. , After the adhesive is dropped into the circular hole, the shaft core of the grip is inserted into the circular hole, and the adhesive is flowed up in the vertical groove to rise inside the groove on the surface abutting the adhesive seat. via the second step of exhibition flow supply and contact wear and grip portion and the cork unit.

Therefore, this cork stopper has a circular hole inner surface,
Adhesive spreads well around the shaft center and on the contact surface with the adhesive seat, firmly adheres, and it is possible to prevent both from coming off due to the force that acts during uncapping, and the adhesive seeps out and cork part The outer peripheral surface is not polluted to cause defective products.

[0015]

EXAMPLES Examples will be described with reference to the drawings. First, as shown in FIGS. 1 to 5, the basic method of the present invention is to form a circular hole 4 having a constant depth on one end face 2 of a cork member 1 and not penetrating to the other end face 3, and to the circular hole 4 downward shaft rod. 5, a first step of inserting an upper mold 7 having a plurality of rows of vertical ridges 6 formed on the outer side surface thereof to form a vertical groove 9 on the inner side surface 8 of the circular hole, and dropping an adhesive 11 on the inner bottom 10 of the circular hole. After injection, grip 1 with shaft core
The second step of inserting the shaft core 13 of No. 2 into the circular hole 4 and causing the adhesive 11 to flow upward in the vertical groove 9 and flow out to the one end face 2 of the cork member which is in contact with the adhesive seat 14 of the grip portion 12. By this, the grip portion I2 with the shaft core is adhered to the cork member 1.

The method of manufacturing this cork stopper will be described in more detail with reference to FIGS. As shown in FIGS. 6 and 7, the upper die 7 is a shaft rod holder 15 to which a shank (not shown) is connected.
A downward shaft rod 5 having a diameter that can be inserted into a circular hole 4 to be described later is provided on the lower surface of the shaft 5, and a plurality of rows of vertical ridges 6 are formed at positions where the outer peripheral surface of the shaft rod 5 is divided at equal intervals. it is obtained by forming a slightly smaller diameter of the annular ridge 16 than the diameter of the cork member 1 to be described later shaft rod 5 and concentric to the lower surface of the shaft rod holder 15.

As shown in FIGS. 8 and 9, the lower mold 17 has a cavity 18 into which a cork member 1 described later can be inserted and an air blowing hole 19 opened at the bottom of the cavity 18, and a heating means (not shown) is provided. It is configured so that it can be heated to a predetermined temperature. Cork member 1 used in the cork may be any of natural cork member or compressed cork member, the depth does not penetrate to the other end face 3 from one end face 2 in cylindrical required diameter as plug 8 Then, a circular hole 4 having a diameter into which the shaft core 13 of the grip portion 12 can be inserted is bored, and the chamfered edges 20 and 21 of the cork member 1 and the other end surface 3 of the cork member 1 are preliminarily chamfered. .. The synthetic resin thin film (polyethylene resin thin film) 22 is temporarily attached to the other end surface 3 of the cork member 1 which has been preliminarily preliminarily processed as described above, by an appropriate means such as an adhesive or heat fusion.

Next, the first step of this method will be described. The previously processed cork member 1 is attached to the lower mold 17
The synthetic resin thin film 22 is inserted into the cavity 18 from the tapered opening 28 at the cavity entrance so as to cover the side surface portion of the cork member 1 from the chamfer 21 portion, and the upper die 7 is moved downward. When the upper die 7 is moved downward, the shaft rod 5 is inserted into the circular hole 4, and the disc-shaped shaft rod holder 15 moves the cork member 1 into the cavity 18.
Press in. The mold is placed in a press capable of heating and cooling, and is pressed at a temperature of 130 ° C to 170 ° C for 3 hours.
Heat for 5 to 5 minutes. By this heating and pressurization, the vertical groove 9 is formed on the inner surface 8 of the circular hole 4 of the cork member 1 by the vertical ridge 6, and the adhesive flow prevention groove 23 is formed on the one end surface 2 by the annular ridge 16. The synthetic resin thin film 22 is fused from the end surface 3 to the side surface portion of the cork member 1 . After the heating time has passed, the mold is kept at 60 ° C.
Then, the upper mold 7 is taken out from the press machine and the upper die 7 is lifted up, and pressurized air is blown into the cavity 18 through the air blowing hole 19 to take out the cork member 1 from the cavity 18. In this first step, the cork member shown in FIGS. 2, 3, 4 and 5 is completed.

Next, the second step will be described. The adhesive 11 is applied to the inner bottom 10 of the circular hole 4 of the cork member 1 processed in the first step.
Is dropped and injected, and the shaft core 13 of the grip portion 12 is inserted into the circular hole 4.

As shown in FIG. 10, since the vertical groove 9 is formed up to the vicinity of the inner bottom 10 of the circular hole 4, the shaft core 13 is not formed.
A circular hole Orifice office effect occurs at the gap difference between the gap formed between the inner surface 8 of the 4 and the groove bottom of the axis 13 and the longitudinal groove 9, the adhesive 11 in this longitudinal groove 9 It flows in, flows upward, reaches the one end surface 2 of the cork member 1, and spreads inside the adhesive flow prevention groove 23 which serves as an adhesive reservoir on this surface. By the adhesive 11 rising and spreading in a limited range on the one end face 2, the adhesive seat 14 of the grip 12 and the one end face 2 of the cork member 1 can be sufficiently bonded. Of course, the adhesive 11 that flows upward in the vertical groove 9 is evenly attached to the inner side surface 8 of the circular hole 4, and the shaft core 13 and the inner side surface 8 of the circular hole 4 can be sufficiently adhered. The outer surface of the member 1 is not soiled. Further, since the cork member 1 is heated and pressed, the side surface and the liquid contact surface are covered with the synthetic resin thin film 22, so that no leaching occurs.

[0021]

Since the present invention is configured as described above, it has the following effects. A vertical groove is formed on the inner surface of the circular hole of the cork member to be bonded in this way, an appropriate amount of adhesive is dropped and injected into the inner bottom of the circular hole, and if the shaft core of the grip is inserted, the adhesive will pass through the vertical groove. Since it is supplied to one end surface of the cork member, it is possible to prevent the adhesion from rising due to internal pressure and to prevent the adhesive from seeping out from the groove, and to prevent the adhesion and stain of the adhesive due to carelessness of the operator. The adjustment of the application position is not required, the cork member and the grip can be firmly adhered, and the two do not come off due to the force that acts during unplugging.

[Brief description of drawings]

FIG. 1 is a sectional view of a cork stopper completed by this method.

FIG. 2 is a front view of a cork member made in the first step of this method.

[FIG. 3] Similarly, a side view with a part cut away

FIG. 4 is a perspective view of a state where the first step is added to the natural cork member .

FIG. 5 is a perspective view of the pressed cork member after the first step is added.

FIG. 6 is a bottom view of the upper die used in this method.

FIG. 7 is a sectional view taken along line AA of FIG.

FIG. 8 is a relationship diagram between the upper and lower molds and the cork member immediately before the first step is added to the cork member.

FIG. 9 is a cross-sectional view of the mold in a state where the first step is being added to the cork member.

FIG. 10 is an enlarged view showing a state in which the flow rate of the adhesive rises during bonding.

FIG. 11 is a cross-sectional view of a state in which an adhesive is dropped in a circular hole of a cork member by a conventional method.

FIG. 12 is a view showing a state in which the adhesive also seeps out from the groove.

FIG. 13 is a view showing a state in which an adhesive is applied to the circular hole and one end surface of the same.

FIG. 14 is a view showing a state in which an air pocket is also generated after the bonding.

[Explanation of Codes] 1 Cork member 2 One end surface 3 Other end surface 4 Circular hole 5 Shaft rod 6 Vertical ridges 7 Upper mold 8 Inner side surface 9 Vertical groove 10 Inner bottom 11 Adhesive 12 Grip 13 Shaft core 14 Adhesive seat

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 7]

[Fig. 12]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 8]

[Figure 9]

[Figure 10]

FIG. 11

[Fig. 13]

FIG. 14

Claims (4)

[Claims] 1. A method of manufacturing a cork stopper in which a grip portion is adhered to a natural cork member or a pressed cork member, wherein a circular hole having a constant depth is formed on one end surface of the luk member so as not to penetrate the other end surface, and the circular hole is formed. After inserting the upper mold in which a plurality of rows of vertical ridges are formed on the outer surface of the downward shaft rod and forming a vertical groove on the inner surface of the circular hole, and after dropping and injecting an adhesive on the inner bottom of the circular hole. A shaft by the second step in which the shaft core of the grip with shaft core is inserted into the circular hole, and the adhesive is flown up in the vertical groove to flow out to one end face of the cork member in contact with the adhesive seat of the grip. A method for manufacturing a cork stopper in which a grip with a core is bonded to a cork member. 2. When inserting an upper mold having a plurality of rows of vertical ridges on the outer surface of the shaft rod into the circular hole of the cork member, the cork member is housed in the cavity of the lower mold and The method for producing a cork stopper according to claim 1, wherein the vertical groove is formed on the inner surface of the circular hole by heating and cooling under pressure. 3. The method for producing a cork stopper according to claim 1, wherein the vertical groove formed on the inner surface of the circular hole is formed up to the vicinity of the inner bottom of the circular hole. 4. The cork according to claim 1, wherein when the cork member is pressurized and heated in the upper and lower molds, the liquid contact surface and the outer surface which are the other end surfaces of the cork member are fusion-coated with the synthetic resin thin film. Method of manufacturing stopper.