JP3479739B2 - Manufacturing method of gasket - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gasket which is made of hard material and soft material and which has a substantially U-shaped cross section and which is attached to the edge portion of a panel such as double glazing by extruding and transporting the gasket into a usable shape. About the production method of.

[0002]

2. Description of the Related Art As a gasket to be attached to an edge portion of a double glazing, for example, a body made of a hard material and having a bottom portion and rising portions on both sides, which have a substantially U-shaped cross section, and the rising portions on both sides are integrally formed. A gasket having a U-shaped cross section is known as a pair of seal portions made of a soft material. This gasket is attached to the edge of the double glazing so that the bottom is in contact with the end face of the double glazing and the pair of sealing parts is in contact with both side surfaces in the width direction of the double glazing.

The above-mentioned gasket is extruded from a resin material into an elongated material having an approximately U-shaped cross section by an extrusion molding machine. The extruded long material is cut to a length that makes it easy to carry, and the multiple cut materials are placed in a container such as a cardboard box and transported from the manufacturing site (factory) to the double glazing assembly site (factory). At the assembly site, the cutting material is cut into a length suitable for the size of the double glazing to be used, and then attached to the edge of the double glazing.

[0004]

If the gasket is extruded, carried, and manufactured into a shape for use as described above, the carrying efficiency is poor and the carrying cost is high. Work efficiency is poor due to the shape used. The material yield of the gasket is poor.

That is, since the extruded long material is cut and the cut material is put into a container and carried one by one, the work is troublesome and time-consuming, so that the carrying efficiency is poor and the carrying cost is low. high.

Further, since the cutting material is taken out from the container one by one at the assembly site and then cut into a working shape, the work is troublesome and time-consuming, so that the working efficiency of the working shape is poor.

Further, since the length of the cut material to be transported is limited for the reason of transportation, when the cut material is cut into a length suitable for the size of the double glazing, it has a size of the double glazing. A cutting material with a length equal to or smaller than the fitted length may remain. Since the remaining cutting material cannot be used, the material yield of the gasket is poor.

In order to solve this problem, the extruded long material is wound around a bobbin at the manufacturing site, transported to the assembly site, rewound at the assembly site, and cut into a length suitable for the size of the double glazing. It is conceivable that the shape is used.

However, since the extruded gasket is made of a hard material and a soft material and has a substantially U-shaped cross section, when it is wound around the bobbin as described above, twisting or the like occurs due to the winding tension, etc.

If the shape is broken, it may not be correctly mounted when it is rewound, cut, and put into a use shape and then attached to the double glazing. In particular, the bottom part is the part that contacts and supports the end face of the double glazing, so it is important that the bottom part be a flat surface. I cannot attach it by touching the bottom correctly.

Therefore, an object of the present invention is to provide a method of manufacturing a gasket that can solve the above-mentioned problems.

[0012]

The first aspect of the invention is to provide a bottom portion 10
And a main body 12 made of a hard resin having a substantially U-shaped cross section at the rising portions 11 on both sides, and a pair of sealing portions 13 made of a soft resin integrally provided on the rising portions 11 on both sides having a substantially U-shaped cross section. ,
A method for producing a gasket 2 having a length suitable for the size of a panel, which comprises subjecting a gasket extruded in a substantially U-shaped cross section using a hard resin having a shape-memory property to a substantially identical cross-sectional shape, Cool the inside of the gasket to memorize the shape, then roll it into a flat gasket, wrap this flat gasket,
A method of manufacturing a gasket is characterized in that the gasket is restored to a memorized gasket having a substantially U-shaped cross section by being unwound and heated after being transported, and then cut into a length suitable for the size of the panel.

A second aspect of the present invention is a method for producing a gasket, which is restored to the gasket having a substantially U-shaped cross section stored by the heating in the first aspect and then cooled to stabilize the shape.

[0014]

[Operation] According to the first invention, since an extruded gasket is wound and conveyed, a large amount of gaskets can be conveyed in a short time. By this, transportation efficiency is good,
The transportation cost is low.

Moreover, since the gasket extruded into a substantially U-shaped cross section is rolled into a flat shape and the flat gasket is wound, deformation such as twisting of the gasket does not occur due to winding tension or the like.

Further, the wound flat gasket is rewound and heated to restore it to a memorized gasket having a substantially U-shaped cross section, and then cut into a length suitable for the size of the panel to be used. Since it is used as a gasket, it is possible to easily manufacture a gasket of the used shape in a short time, and its working efficiency is good.

Moreover, since the rewound gasket is cut into a length suitable for the size of the panel, the length of the wasteful gasket is extremely short. As a result, the material yield of the gasket is good.

Further, the cross section U stored by heating is substantially U.
Since the gasket is restored to the V-shaped gasket, it can be restored to the gasket having a substantially U-shaped cross section, which has been memorized by restoring the twist and the bending generated when the flat gasket is wound and transported.

According to the second aspect of the invention, the shape of the restored gasket can be immediately stabilized and the shape does not change when the gasket is cut.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the drawings. The panel of the present invention includes a double glazing, a single glazing, a panel using a panel other than glass, and the like, and the following description will be given based on the double glazing. (Mounting state of gasket) As shown in FIG. 1, a gasket 2 is attached to an edge portion of the double glazing 1, and the gasket 2 is fitted into a glass mounting groove 4 of a stile 3 so that the double glazing 1 and the sash are joined together. 3 is airtight between the glass mounting groove 4 and the opening edge 5
Watertight. The gasket 2 has a substantially U-shaped cross section with a body 10 having a bottom portion 10 and upstanding portions 11 on both sides, and a substantially U-shaped cross section, and a pair of seal portions 13 integrally provided on the upstanding portions 11 on both sides.

The main body 12 is made of a hard resin having a shape memory property such as hard vinyl chloride. As the hard resin having the shape memory, it is more preferable to use a resin having a large degree of polymerization in order to exert the shape memory more, and a small amount of additives such as a plasticizer, a filler and a reinforcing material. It is effective. The seal portion 13 is made of soft resin such as soft vinyl chloride.

The bottom 10 is in contact with the end face 1a of the double glazing 1 and is placed on the upper surface of the setting block 6 to support the double glazing 1. The pair of seal portions 13 are in contact with both side surfaces 1b of the double glazing 1, and are in contact with the opening edge 5 of the glass mounting concave groove 4.

Next, a method of manufacturing the gasket will be described. As shown in FIG. 2, hard vinyl chloride is charged into the first charging section 21 of the extruder 20 and soft vinyl chloride is charged into the second charging section 22 to extrude the gasket 23. This gasket 23 is similar to the gasket 2 shown in FIG.
2 and a pair of seal portions 13 have a substantially U-shaped cross section. The extruded gasket 23 is subjected to a sizing process in the sizing section 24. Specifically, it is cooled, sucked into a mold, dimensioned, and the bottom 10 is made a flat surface (flat surface). That is, the shape is stabilized by cooling while sucking.

As with the gasket 2 shown in FIG. 1, the gasket 25 whose shape has been stabilized by the sizing treatment has a body portion 12 and a pair of seal portions 13 which are substantially U-shaped in cross section. The shape-stabilized gasket 25 is sufficiently cooled by the cooling unit 26,
By completely cooling (taking in heat) the inside of the gasket, the shape of the main body 12 in a shape-stabilized state is stored. The cooling unit 26 is a water tank, and the inside of the water tank is water-cooled by passing through the gasket 25. The cooling unit 26 may be one that sprays cooling water onto the gasket.

The cooled gasket 27 is attached to the pair of rollers 2.
8 and the step roller 29 to roll the flat gasket 30 shown in FIG. In this flat gasket 30, the main body 12 is rolled into a substantially flat plate shape, and the pair of seal portions 13 are not deformed by rolling. The flat gasket 30 is used for the bottom portion 10 of the main body portion 12.
And a pair of curved traces 31 are formed at the boundary between the rising portions 11 on both sides.

The flat gasket 30 is a tubular body,
For example, it is wound around the body 33 of the bobbin 32. Bobbin 32
Has flanges 34 on both sides of the body portion 33, and the body portion 33 is longer than the width of the flat gasket 30, and is flat by rotating the bobbin 32 while moving in the left-right direction as shown by the arrow. The shaped gasket 30 is wound in a spiral shape. As a result, a large amount of the flat gasket 30 can be wound around the bobbin 32.

The flat gasket 30 wound around the bobbin 30 is transported from the extrusion molding site to the assembly site. As shown in FIG. 4, the flat gasket 30 wound around the bobbin 32 is unwound at the assembly place and heated by the heating portion 35 to restore the body portion 12 to the memorized shape. The heating unit 35 is a tank containing a liquid at 90 ° C. to 100 ° C., and heats the liquid at 90 ° C. to 100 ° C. by passing the gasket 30 having a flat shape. By heating in this way, the bending and twisting habits that occur when the bobbin 32 is wound up are eliminated, and the shape is restored to a shape closer to the shape of the main body 12 in a shape-stabilized state, and the heating is efficiently performed. Can be done on a regular basis. The heating unit 35
May be heated by passing a flat gasket 30 in steam at 70 ° C to 120 ° C.

The gasket 36 restored to the stored shape is cooled by the cooling unit 37 to stabilize the restored shape. The cooling unit 37 is a water tank, and water is cooled by passing a gasket 36 through the water tank.

Gasket 38 that has been cooled and stabilized in shape
As shown in FIG. 5, the main body 12 and the pair of seals 13
The shape is the same as the memorized shape having a substantially U-shaped cross section.

Gasket 38 that has been cooled and stabilized in shape
The driving roll 39 and the driven roll 40 are brought into pressure contact with the bottom portion 10 and are conveyed in the direction of the arrow. The flat gasket 30 is unwound from the bobbin 32 by this carrying force, and also passes through the heating unit 35 and the cooling unit 37.

The conveyed gasket 38 is cut by a cutter 41 into a length suitable for the size of the double glazing 1, and the cut gasket becomes a gasket 42 of a used shape. As shown in FIG. 1, the gasket 42 of this used shape is attached to the edge portion of the double glazing 1.

In the above-mentioned FIG. 4, the heating unit 35 and the cooling unit 3
It is also possible to provide a correction portion between the two and to restore the gasket 36 restored to its original shape to the shape shown in FIG. As the correction unit, for example, as shown in FIG.
0 and a pair of rollers 51. The guide 50 is shown in FIG.
2 is a block having a cross-sectional shape that is in contact with the bottom surface 10 of the main body portion 12 and both side rising portions 11.

[0033]

According to the first aspect of the present invention, since an extruded gasket is wound and conveyed, a large amount of gaskets can be conveyed in a short time. As a result, the transportation efficiency is good and the transportation cost is low.

Moreover, since the gasket extruded in a substantially U-shaped cross section is rolled into a flat shape and the flat gasket is wound, the gasket is not deformed such as twisted due to the winding tension or the like.

Further, the wound flat gasket is unwound and heated to be restored into a memorized gasket having a substantially U-shaped cross section, and then cut into a length suitable for the size of the panel to be used. Since it is used as a gasket, it is possible to easily manufacture a gasket of the used shape in a short time, and its working efficiency is good.

Moreover, since the rewound gasket is cut into a length suitable for the size of the panel, the length of the wasteful gasket is extremely short. As a result, the material yield of the gasket is good.

Further, the cross section U stored by heating is approximately U.
Since the gasket is restored to the V-shaped gasket, it can be restored to the gasket having a substantially U-shaped cross section, which has been memorized by restoring the twist and the bending generated when the flat gasket is wound and transported.

According to the second aspect of the present invention, the shape of the restored gasket can be immediately stabilized, and the shape does not change when the gasket is cut.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a gasket is attached to double glazing.

FIG. 2 is a perspective view showing steps from extrusion molding to bobbin winding according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a flat gasket.

FIG. 4 is a perspective view showing a process of rewinding to a used shape.

FIG. 5 is a cross-sectional view of a gasket restored to a substantially U-shaped cross section.

FIG. 6 is a perspective view of a correction unit.

[Explanation of symbols]

1 ... Multi-layer glass (panel), 2 ... Gasket, 3 ... Frame,
10 ... Bottom part, 11 ... Both side rising parts, 12 ... Main body part, 13
... seal part, 20 ... extrusion molding machine, 24 ... sizing part,
26 ... Cooling part, 30 ... Flat gasket, 31
... Bent marks, 32 ... Bobbin (cylindrical body), 35 ... Heating part, 3
7 ... Cooling unit, 41 ... Cutter.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-9-60432 (JP, A) JP-A-4-153487 (JP, A) JP-A-11-325317 (JP, A) JP-A-2000-145966 (JP, A) Actual development Sho 59-98090 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E06B 3/54-3/64

Claims (2)

(57) [Claims] 1. A body portion 12 made of a hard resin having a substantially U-shaped cross section at a bottom portion 10 and both side rising portions 11, and a pair of soft resin sealing portions 13 integrally provided on the both side rising portions 11. Is a method of manufacturing a gasket 2 having a substantially U-shaped cross section and a length suitable for the size of a panel, in which a gasket extruded into a substantially U-shaped cross section using a hard resin having a shape-memory property is used. Sizing processing to the same cross-sectional shape, cooling to the inside of the gasket to remember the shape,
After that, roll it into a flat gasket, wind this flat gasket, transport it, rewind it, and heat it to restore it to a memorized gasket with a substantially U-shaped cross section. A method for manufacturing a gasket, which is characterized in that the gasket is cut into a length suitable for. 2. The method for manufacturing a gasket according to claim 1, wherein the gasket is restored to the memory having a substantially U-shaped section stored by the heating and then cooled to stabilize the shape.