JPS6127166B2 - - Google Patents

Abstract

PURPOSE:To apply a sealing material to a substrate regardless to the strength of or the local irregularity of the substrate, by injecting the sealing meterial into a cavity formed between upper and lower molds, releasing one of the mold from the injected sealing material, and transferring the material to the surface of the substrate. CONSTITUTION:A pair of gaskets 26 and 27 are attached to the cavities of the upper and the lower molds 16 and 22. The molds are clamped until both gaskets are brought into close contact; a sealing material 1 is injected into the cavity formed by both gaskets through a nozzle 28; both molds 16 and 22 are separated each other leaving the molded sealing material 1 in the cavity of the lower mold 22; the lower mold having the sealing material 1 is conveyed to the transfer section; a substrate 2 is pressed to the sealing material protruded from the mold 22; and the substrate attached with the sealing material is separated from the lower mold 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of applying a sealant to an object to be adhered by a casting method.

Conventionally, there are various methods of applying a sealant to attach a component to a predetermined attachment location of another component via a sealant. For example, a method of applying sealant extruded in the form of a string from a nozzle to an object to be adhered by hand or mechanical means (sometimes called the tracing method)
However, such means require a lot of time and effort, and the shapes of the tip and end of the sealant are unstable, making it difficult to apply the sealant in a uniform shape.

In addition, as a method of applying a sealant to an object to be adhered, there is a so-called direct method in which the object to be adhered is supported in a fixed mold, the sealant is injected into the mold, and the sealant is directly applied to the object to be adhered. Pouring method is possible. However, even with this direct casting method, if the injection pressure is too high, the object to be adhered will be damaged, and if the injection pressure is too low, it will not be possible to apply the sealant in the specified shape, and in any case, the object to be adhered will have low strength. It is difficult to apply the sealant to the adhesive surface, and depending on the shape of the surface of the object to be adhered, it is difficult to apply the sealant to the object, which may limit the objects to be adhered, or it may be difficult to apply the sealant due to excessive injection of sealant. In some cases, there were drawbacks such as the sealing material sometimes protruding.

The purpose of the present invention is to further improve the injection method, and when applying a sealant to the periphery of an object to be adhered and assembling it, the sealant in a predetermined shape is applied to an arbitrary object such as a part in a short time. This provides a method for reliably assigning information.

In order to achieve the above-mentioned object, the present invention includes a pair of upper and lower molds having grooves having different surface areas facing each other, at least one of the grooves being coated with an elastic body having mold releasability in advance, and the upper and lower molds being closed. A sealing material is injected into the groove formed by the state, and one mold, which will be the non-molded base side, is opened.
After the mold is removed, the object to be adhered is pressed against the surface of the other mold holding the sealing material, and the sealing material is transferred to the object to be adhered.

Next, the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a perspective view of glass provided with a sealant according to the method of the invention. The sealing material 1 is applied to the periphery of glass, which is the object 2 to be adhered.

FIG. 2 is a side view of an apparatus used as an embodiment of the invention. The apparatus shown in FIG. 2 basically comprises a pump section 4 that supplies sealing material under pressure, a molding press section 3, and a transfer section 8.

First, the seal material is molded from the pump part 4 to the press part 3.
sent to. That is, the sealing material raw material unwound from the sealing material raw material roll 6 of the pump section 4 enters the hopper 7, is pushed up by the screw 5 rotated by the drive motor 9, passes through the pressurized supply hose 11, and is sent to the molding press section. It will be sent to 3. A safety relief valve 10 is provided at the top of the screw portion.

Next, in the mold press section 3, an upper mold (sometimes called a receiving mold) 16 is attached to the upper frame 14 via an upper spacer 15, and a lower mold (sometimes called a mold) 22 is attached to the lower spacer 21. Attach the lower mold 22 to the pressure plate 2
The upper mold 16 and the lower mold 22 are pressurized by the screw jack 19, and then the pump section 4 is used for pressurized supply. The sealing material supplied through the hose 11 is transferred to the switching valve 1.
2 is opened by the cylinder 13, it is filled into a groove (described later) formed by the upper mold 16 and the lower mold 22 through the distribution hose 17, and is injected and molded, and the switching valve 12 is closed. After that, by lowering the lower mold 22, the upper mold 16
is released, and the lower mold 22 holding the sealing material injected into the grooves of the lower mold 22 is pulled out onto the transfer portion 8 by the rollers 23. In the transfer section 8 in FIG. 2, the portion drawn with two-dot chain lines is a virtual view of the lower mold 22 drawn out to the transfer section 8 in this manner.

In the transfer section 8, the object 2 to be adhered, such as glass, is positioned and supplied from above the lower mold 22, and the object 2 to be adhered is placed by a vacuum putt 24 that passes through the hollow part (not shown) of the lower mold 22 and rises from below. The object to be adhered 2 is held by suction and further pressed against the surface of the lower mold 22 by the cylinder 25. At this time, the sealing material held in the groove of the lower mold 22 is also pressed against the two surfaces of the adhered object. Next, after the suction of the vacuum pad 24 is cut off, the cylinder 25 is raised, and the object 2 to be adhered to which the sealing material is adhered is pushed upward one by one. In this way, for example, a string-shaped sealing material is injected between the upper and lower molds, the sealing material is pulled out while remaining in the lower mold, and then adhesively transferred to the object to be adhered.

FIG. 3 is a side sectional view of the apparatus showing a transfer section in a different form from that in FIG. 2. In the mechanism shown in FIG. 3, the object 2 to be adhered is held at a predetermined position on the drawn-out lower mold 22 by a vacuum part 30.
Alternatively, the object 2 transferred by a separate means is placed, and the object 2 is placed in the lower mold 22 by lowering the crimping ring 34 attached to the crimping cylinder 29.
press against the surface. At this time, the spring 33 acts to provide a buffering effect in the case of the adherend 2 having low strength. In this way, the sealing material 1 is attached to the object to be adhered. Next, the suction of the vacuum part 30 is cut off and the crimping cylinder 29 is raised, and at the same time, the demolding cylinder 32 to which the demolding part 31 is attached is raised to release the adhered object 2 to which the sealing material 1 is attached and held from the lower mold. Alternatively, depending on the case, the vacuum part 30 may be used to remove the adherend 2 with or without using the demolding cylinder 32 at the same time.
is released from the lower mold 22.

Next, the steps of injection molding the sealing material into the upper and lower molds and transferring the sealing material to the adhered object in the present invention will be explained.

FIG. 4 is a partial sectional view of the sealing material injection molding device in the molding press section. Packing 26 is provided on the peripheral surfaces of the upper mold 16 and the lower mold 22
These packings 26 and 27 have facing grooves in the upper mold 16 and the lower mold 22, and a groove is formed between the two grooves. Further, one or preferably a plurality of sealing material injection ports 28 are provided at arbitrary positions in the groove, and the sealing material injection portion having the injection ports 28 is held down by the upper spacer 15. The sealing material 1 supplied under pressure is led to the injection port 28 by the distribution hose 17, and is injected under pressure into the groove formed by the packings 26 and 27.
For example, it is a string-shaped sealing material 1.

5A to 5E are partial cross-sectional views of the upper and lower mold portions for explaining the process of applying the sealant of the present invention. FIG. 5a shows a state in which the upper and lower molds 16 and 22 are pressurized so that they are substantially brought into close contact with each other, and a space groove is formed between the packings 26 and 27. FIG. 5b shows a state in which the sealing material 1 is injected into the groove shown in FIG. 5a, and then, as shown in FIG.
The sealing material 1 is held by the lower mold 22.
Pull it out to the transfer section. As shown in FIG. 5d, in the transfer section, the adhered object 2 is pressure-adhered to the sealing material 1 that protrudes corresponding to the groove of the upper mold 16, and the adhered object 2 is separated from the lower mold 22, as shown in FIG. 5e. The transfer of the sealing material 1 to the adhered object 2 is completed as shown in FIG.

The method of applying a sealant of the present invention is suitably used when applying a string-like or band-like sealant to the periphery of an object to be adhered, such as a car window glass. It is used to provide water-resistant seals to automotive parts, architectural parts such as glass in high-rise buildings, and to apply sealants to other external parts.

The objects to be adhered used in the practice of the present invention are not particularly limited as long as they need to be coated with a sealant, but they are also preferably used for objects to be adhered made of materials with low strength such as glass and plastic. It can also be applied to metal parts, etc.

The sealing material used in carrying out the present invention is arbitrarily selected depending on the type of the adhered object. The sealant is preferably a resin that is treated as a viscous fluid when applied, and specifically, butyl-based sealants, mixed reaction type sealants such as two-component urethane, moisture-curing sealants such as one-component urethane, and thiocol-based sealants. Examples include wood.

In carrying out the present invention, a sealing material is injected into a groove formed by a pair of upper and lower mold grooves having opposing grooves. The relationship between the upper and lower molds is relative, and the upper and lower molds may be reversed. When the mold is released after injection of the sealant, the sealant is held on the required side, for example, on the lower mold side. For this purpose, the grooves of the upper and lower molds are formed so that their surface areas are different, for example, one groove is made deep, or the grooves of one mold, for example, the upper mold, are approximately flat and the grooves of the other mold, that is, the lower mold, are made deep. Preferably, it is approximately V-shaped or U-shaped. In this way, by forming the grooves on at least one of the upper and lower molds to have different surface areas, it is possible to transfer the molded sealing material in a state that slightly protrudes from the grooves of the mold, and as a result, Even if an object to be adhered with low strength is pressed, it is less likely to be damaged, and the adhesive area with the object to be adhered is expanded, making it possible to transfer in a stable state.

In addition, by molding the groove of the lower mold, which is the molding base side, into a substantially V-shape or a substantially U-shape, it is easy to remove the sealant from the mold, and it is also easy to transfer the sealant to the adherend. Later, since the sealing material has a substantially triangular cross-sectional shape, it is possible to improve the conformability of the sealing material when attaching the object to be adhered to another member. Further, as explained above with reference to FIGS. 4 and 5, the grooves may be formed of elastic packing, and it is preferable that this packing has releasability. In other words, when using packing, the properties required for this packing are strength that can withstand the pressure of the sealant when pressurized, and mold releasability that prevents the sealant from sticking.For example, the use of silicone rubber, nitrile butane diene, etc. Rubbers used for general packing such as rubber, styrene-butadiene rubber, and nitrile rubber have been treated with silicone-based mold release agents. In the present invention, either the packing of the upper or lower molds may be omitted and the mold surface may be formed directly into the molding groove, but in general, in the case of low-strength glass, it is better to use packing on the side that comes into contact with the mold. This is preferable because flexibility can be obtained when transferring the material.

The depth of the groove formed by the packing may affect the stability during transfer of the sealant, and the shape of the groove of the packing is determined by the required cross-sectional shape of the sealant. The applied sealing material is usually used in the form of a string for the purpose of sealing, but in some cases it may also be in the form of dots or round holes, or it may be formed into a mold so that it can be partially sealed. Grooves may be formed partially or discontinuously.

In carrying out the present invention, a screw jack is used as the pressurizing mechanism in the above drawings, but other pressurizing mechanisms such as a cam type or a hydraulic type may also be used. In addition to the machine, a pump for high viscosity or the like may be used.

According to the present invention, the sealing material is injected into the groove formed between the upper and lower molds, preferably the groove having a packing function and mold release performance, and then is transferred to an object to be bonded such as glass. This method has the advantage that it is stable regardless of the breaking strength of the object to be adhered or local irregularities, and can reliably apply a string-like sealing material without the sealing material protruding. In addition, since the casting method is adopted, it is possible to uniformly apply sealing material not only in the shape of a string but also in complex shapes such as those with round holes, which has the advantage of improving the sealing performance of parts' mounting parts, etc. be. Also, unlike the conventional molding method, the sealing material can be molded exactly as per the mold, so as mentioned above, it is reliable and the sealing performance is improved. Further, since at least one of the grooves of the pair of upper and lower molds each having grooves having different surface areas facing each other is coated with an elastic body having mold releasability in advance, the releasability between the mold and the sealing material is improved. In addition, even if a low-strength adhered object is pressed and transferred to the sealing material held in the mold, the pressing force is absorbed by the cushioning effect of the elastic body, so the adhered object will not be deformed.
It has the effect of being able to transfer reliably in a stable state without causing damage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an object to be adhered to which a sealant is applied according to the present invention, FIG. 2 is a side view of an apparatus used as an embodiment of the present invention, and FIG. 3 is a diagram showing a different embodiment from FIG. 4 is a partial sectional view of the sealing material injection molding device in the molding press section; FIG. 5 is a side sectional view of the apparatus showing the transfer section; FIG. A partial sectional view is shown respectively. DESCRIPTION OF SYMBOLS 1... Sealing material, 2... Adhesive object, 3... Molding press part, 4... Pump part, 8... Transfer part, 16... Upper mold, 17... Seal material distribution hose, 22... Lower mold, 26... Packing, 27... Patsuking.

Claims (1)

[Scope of Claims] 1. A pair of upper and lower molds each having grooves having different surface areas facing each other, at least one of the grooves being coated with an elastic body having mold releasability in advance, and the upper and lower molds being closed. After injecting and molding a sealing material into the groove where the sealant is to be molded, opening and removing one of the molds that will become the non-molding base side, press the object to be adhered onto the surface of the other mold that holds the sealant. A method for applying a sealant, the method comprising transferring a sealant to an object to be adhered. 2. The method of applying a sealing material according to claim 1, which uses upper and lower molds in which at least one groove provided in the pair of upper and lower molds is approximately V-shaped or approximately U-shaped.