JPH06246782A - Insert molding of plate glass fitted product - Google Patents

Abstract

PURPOSE:To prevent the damage of plate glass in the insert molding of a plate glass fitted product such as a shoji or a door. CONSTITUTION:In insert molding performed in such a state that plate glass 3 is received in a reactive injection mold 8, a reactive injection molding resin is used and plate glass 3 is fitted in a frame member composed of the reactive injection molding resin in such a state that elastic members 6 are interposed along with tight materials 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert molding method for a plate glass-inserted product which integrally forms a panel-like product such as a shoji screen, a door, and a fitting window by using a plate glass as an insert member.

[0002]

2. Description of the Related Art So-called aluminum fittings, which are framed by left and right vertical frames and upper and lower frames made of extruded shape materials such as aluminum, are often used for shoji doors and doors, which are typical as plate glass fittings. However, this also has disadvantages in use and manufacturing.
For example, when used, looseness occurs in the screws of the framework, causing play. Also, in manufacturing, it takes time to attach small parts such as handles and doors, it is difficult to add a radius to the frame in the case of a round window, and it is difficult to show a pattern on the surface of the frame, which hinders mass productivity. is doing. Since such a disadvantage can be avoided by integrally molding the frame with plastic, insert molding is also attempted for a plate glass fitting.

The insert molding method for a plate glass-inserted article which has been tried so far is the same as the ordinary insert molding, and the plate glass is placed in the reaction injection molding mold in the mold. The method of pouring the molten metal of the plastic was taken.

[0004]

Insert molding is a method of supplying a thermoplastic material into a heating cylinder, melting it at a high temperature, and injecting it into a mold at a high pressure. The insert molding has a problem that the plate glass is damaged due to the high pressure and the high temperature of the molten metal.

A tight material (also called a grechan or packing) made of flexible vinyl chloride resin or neoprene rubber is interposed between the plate glass and a frame such as a frame to secure airtightness and holding property. However, the tight material also deforms and melts due to high temperature and high pressure. Since the conditions for preventing damage to this insert component are too strict, it was difficult to mass-produce the insert-molded product with the insert molding. Further, as the molten resin material cools and solidifies, the frame body, which is a molded product, contracts, so that there is a problem that the plate glass fitted into the frame body is subjected to an unreasonable force to break the plate glass. However, if this is possible, from one point of view, it means that the various inconveniences found in the above-described aluminum fittings can be eliminated.

The present invention has been made in view of the above circumstances.
An object of the present invention is to provide an insert molding method for a plate glass-inserted product in which the plate glass and the tight material holding the plate glass are not damaged during the reaction injection molding.

[0007]

In order to achieve the above-mentioned object, the method of insert molding a sheet glass insert of the present invention is a reaction injection molding method in which the sheet glass is housed in a reaction injection molding die. Using molding resin,
It is characterized in that a plate glass is fitted together with a tight material with an elastic member interposed in a frame made of the resin for reaction injection molding.

[0008]

Since the low-viscosity liquid resin is injected into the reaction injection mold at low pressure and low temperature, the plate glass is not damaged at that time. Further, even if the tight material is used for supporting it, the deformation of the tight material can be minimized without melting the tight material without impairing practical performance. Further, since the elastic member is interposed in the frame body together with the tight material that holds the plate glass, the contraction of the frame body, which is a molded product due to the cooling and solidification of the reaction injection resin, causes the elastic member to be flattened. No force will be applied to the sheet glass that is absorbed and fitted by.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 and FIG. 2 show an example of the implementation of a door D of a skylight. The door D is made of a plastic frame 1 into which a plate glass 3 is fitted by insert molding. The tight member 4 is fitted around the periphery of the tight member 3, and the elastic member 6 is attached to the back surface of the tight member 4, and the plate glass 3 is supported by the frame body 1 via them. A handle 5 for opening and closing is also attached by insert molding.

Regarding the shape of the frame body 1, each corner is rounded, and a drainage groove 7 is formed on the outer surface.
In addition, roof tiles and a colonial-like pattern 9 are attached according to the roofing of the mounting location. This is in order to harmonize with the roof and eliminate discomfort in mounting.

To insert-mold such an opening / closing door D, a reaction injection molding die 8 comprising a lower die 9 and an upper die 11 is used. Then, the tight material 4 is fitted around the plate glass 3 and the elastic member 6 is attached to the back surface of the tight material 4, and then the plate glass 3 is assembled into the lower mold 9 as shown in FIG. Set. Then, in the mold clamped state, the reaction injection molding resin is injected, and after it is cured, it is removed from the mold. At this time, the shrinkage of the frame body 1 which is a molded product due to the cooling and solidification is absorbed by the elastic member 6 on the back side of the tight material 4 being crushed and flattened, which is suitable for this role. Thus, the material and thickness of the elastic member are set. In this embodiment, the elastic member 6 is made of a foamed polyurethane resin having a thickness of 10 mm, assuming that the frame member having a length of 1 m contracts 10 mm in the length direction. Finally, the surface is polished and spray-painted to obtain the opening / closing door D as a finished product shown in FIG.

Examples of the reaction injection molding resin include zinc pentapentane (DCPD). According to this, since the low-viscosity liquid resin is injected at low pressure and low temperature,
The soft tight material 4 and the elastic member 6 do not melt, the deformation of the tight material can be suppressed to such an extent that practical performance is not hindered, and the plate glass 3 is not damaged.

The lower mold 9 and the upper mold 11 are substantially symmetrical in shape, each having a shallow concave surface 13 that sandwiches the plate glass 3, and a relatively deep concave groove for forming the frame 1 around the shallow concave surface 13. 15 is formed, and a step portion 17 on which the tight material 4 is hooked is provided at the end of the concave surface 13. Further, the lower die 9 is provided with a storage portion 19 for the handle 5, and the upper die 11 is provided with the draining groove 7 forming portion 21 and the pattern 10 forming surface in the concave groove 15.

As described above, not only the colonial-like pattern on the frame 1 due to the shape of the mold, but also the Japanese roofing-like pattern as shown in FIG. The pattern 10 can be formed. Although different from this embodiment, the handle 5 can be integrally formed as a means for reducing the number of parts.

As the plate glass 3, an ordinary window glass whose main component is quartz is used. However, even if it is made of plastic such as acrylic resin, the conventional insert molding has a disadvantage that it is damaged as in the case of ordinary plate glass. Therefore, the present invention does not exclude plastic plate glass. .

The tight material 4 is made of vinyl chloride resin or neoprene rubber having a wall thickness of about 1 mm. In each case, a soft one that deforms or melts when used in ordinary insert molding is used. However, no such failure occurred in this example.

Unlike aluminum fittings, a framework made of extruded shape is not required to hold the tight material 4,
As shown in FIGS. 4 to 6, even if the plate glass 3 has a heart shape, a goldfish shape, or an apple shape, there is no inconvenience in manufacturing.

Since it is possible to use the tight material 4 and the elastic member 6 which are more flexible, the tight material 4 and the elastic member 6 are provided around the plate glass even with such a complicated edging shape. It is easy to wear and it is possible to provide fittings that are complicated in design.

FIG. 7 shows an example implemented in the manufacture of the indoor door D, which is a pair of left and right plate glasses 3, 3 formed by insert molding on the overall flat frame 1. Insert the cast iron veneer 2 between the two
3 is fitted. In addition, the handle 5 and the hinge 25 are similarly attached by insert molding, and the three-dimensional pattern 10 is provided on both surfaces of the frame body 1 by unevenness.

Although the tight material 4 is interposed in the fitting of the plate glass 3, the decorative plate 23 is fitted into the frame 1 directly because there is no risk of damage by the insert molding. Further, semi-circular rounded shapes are attached to the upper and lower ends of the small window into which the plate glass 3 is fitted. In addition, in the case of the conventional product, since the small window is framed by the extruded shape member, such a simple rounding is very troublesome in processing.

FIG. 8 shows an example in which the sliding door S is used. In this case, not only the plate glass 3 but also the door roller 27 is attached by insert molding. Further, as the indoor type, a tight material is not necessarily required, so that the plate glass 3 is directly fitted into the frame body 1.

[0023]

As described above, according to the present invention, since insert molding is performed with the resin for reaction injection molding and the plate glass is fitted into the frame body made of the resin for reaction injection molding, the ordinary insert is used. The resin material is injected at a relatively low pressure and low temperature compared to the case of molding, and since the elastic material is interposed in the frame body together with the tight material that holds the plate glass, the frame body shrinks as the reaction resin cools and solidifies. Is not absorbed and force is not applied to the glass sheet, so that the glass sheet can be prevented from being damaged. In addition, when using a tight material that supports flat glass, there is no inconvenience that it deforms or melts, so it is particularly suitable for low-cost mass production of fittings such as shoji doors and doors, and furthermore, flat glass simply framed with plastic. It has an excellent effect that it is also suitable for expanding the applications of embedded products.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a reaction injection molding die shown in a procedure of setting a plate glass as an insert member.

FIG. 2 is a partially cutaway perspective view showing an opening / closing door as a plate glass fitting which is insert-molded by the reaction injection molding die.

FIG. 3 is a partial perspective view of a frame body of an opening / closing door according to another embodiment.

FIG. 4 is an explanatory view showing a edging shape of a plate glass tight material and an elastic member according to another embodiment.

FIG. 5 is an explanatory diagram showing a edging shape of a tight material and an elastic member of a plate glass according to still another embodiment.

FIG. 6 is an explanatory view showing a edging shape of a tight material and an elastic member of a plate glass according to still another embodiment.

FIG. 7 is a front view of an opening / closing door as a plate glass fitting according to another embodiment.

FIG. 8 is a front view of a lower end portion of a sliding door as a plate glass fitting according to another embodiment.

[Explanation of symbols]

 D Door as a plate glass fitting S Sliding door as a plate glass fitting 1 Frame 3 Plate glass 4 Tight material 6 Elastic member 8 Reaction injection mold

Claims (1)

[Claims] 1. In an insert molding in which a plate glass (3) is housed in a reaction injection molding die (8), a reaction injection molding resin is used, and a frame body (1) made of the reaction injection molding resin is used. ), The plate glass (3) is fitted together with the tight member (4) with the elastic member (6) interposed therebetween.