JPS591228A - Molding device of packing material - Google Patents

Abstract

PURPOSE:To make the excess material of a foaming object flow in easily in a space part, by shaping a V-shaped protrusion loop like at least to one of two jigs having a specified hardness and shape, also providing a plurality of notch parts on the way. CONSTITUTION:A first jig 11 is fitted inside the duct combining member 8 which consitutes a closed object. A loop like concave part 8a is shaped in the combining member 8 at the place where a seal is necessary and a fluid foaming object, the unreacted product 10 of e.g., a foamable silicone, soft urethane, etc. is poured in the concave part 8a from a nozzle 12. Also, the space 14 to be filled with a foam object is shaped by joining the first jig 11 and cooperating with the concave part 8a of the duct combining member 8 and the fluid foaming object of the foamable silicone, etc. is for example poured into its concave part 8a from the nozzle 12. A packing material is shaped directly at the combining member 8, the special used of an adhesive becomes unnecessary and an assembly is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is applicable to parts that require airtightness, such as the exhaust and air passages of clothes dryers, and watertight parts, such as the water passages of washing machines and dishwashers. This relates to a molding device for backing material that is appropriately placed in areas that require watertightness and its problems. This is 9, which has been widely known. As an example, the drying method shown in FIG. This is a fan that is rotationally driven through the The rotating drum 2 is rotated by the rotational force of the motor 4.

Hot air is sucked into the rotating drum 2 by the rotation of the fan 3, and the clothes in the rotating drum 2 are heated and dried. The hot and humid air after being subjected to the drying process passes through the rear wall of the rotary drum 2, passes through the fan case 6, reaches the 1V exhaust guide 7, and further passes through the duct coupling member 8 and the second exhaust duct 9. Therefore, there is no danger that the room will become damp and the room temperature will not rise.

Above 1. The air passing through the second exhaust duct, 9, is
Although the relative humidity remains almost 100%, the water droplets generated by the cold outside air in the first and second exhaust ducts 7.9
．． There is a high possibility that leakage may occur between the second exhaust duct 7.9 and the duct coupling member 8. Therefore, as shown in the diagram,
A backing material 1° is interposed, for example, between the first exhaust duct 7 and the duct coupling member 9.

However, if the backing material 10 is formed separately to simply be held between the members and fixedly tightened between the members, the mounting position of the backing material will not be stable, and the backing material will not be held properly.
This entails the laborious work of setting it up.

OBJECTS OF THE INVENTION It is an object of the present invention to make it possible to avoid handling the backing material alone and to mold it with high precision.

DESCRIPTION OF THE INVENTION The present invention is extremely advantageous in assembling, and also achieves high precision by injecting and solidifying a foam into the space between a jig and an object to be sealed, such as a duct coupling member as shown in the conventional example. It is used to form a backing material with good quality.

Description of examples Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 shows an enlarged view of the sandwiching structure of the backing material 10 for preventing water leakage between the duct coupling member 8 and the first exhaust duct 7 in FIG. 1. Duct coupling member 8
, the first exhaust duct 7 has a rigidity higher than a predetermined value, and
As long as it has heat resistance, it may be formed of any material including metal materials, but in consideration of ease of productivity, it is preferable to mold it from synthetic resin.

Furthermore, it is highly likely that the shapes of the duct coupling member 8 and the first exhaust duct 7 will become complicated, and accordingly, the shape of the backing material 10 will also become complicated.

That is, the cross-sectional shape of 1° of the backing material cannot necessarily be uniform. Furthermore, when attaching the first exhaust duct 7, it is difficult to tighten the backing material 1o with a uniform force over the entire circumference depending on the rigidity of the first exhaust duct 7.

Therefore, silicon is used as the backing material 1o.

A soft material such as soft urethane and a foaming material are preferable.

However, in the case of foamed silicone or foamed soft urethane, if the cross-sectional shape differs depending on the location with a thin product with a thickness of about 5W, it is difficult to use a mold to form the backing material 1o. It is difficult and expensive.

Therefore, the backing material 1o was molded as follows. .

As shown in FIG. 3, the first jig 11 is fitted into the duct coupling member 8 constituting the sealed body.

The duct coupling member 8 is formed with loop-shaped recesses 8a at locations where sealing is required. The product is injected through the nozzle 12.

Further, in FIG. 4, reference numeral 13 is joined to the first jig 11, cooperates with the concave portion 8a of the duct coupling member 8, forms the space 14 for filling the foam, and fills the filled foam. This is the second jig for molding.

Here, the foam injected into the space 14 generates bubbles during a hardening reaction during the assimilation process, but the purpose of this is to prevent the duct coupling member 8 from rising due to the bubbles. A weight of 15 is placed on.

The above-described foamable silicone and soft urethane are preferable because they undergo a curing reaction at room temperature and humidity. Moreover, the processability of the above-mentioned foam becomes good by heating it to 40 to 80°C.

The reaction of the polyhydric alcohol represented, i.e. -, +R-
NHCOOR'-0CONHR-NHCOOR'-).

and carbon dioxide generation reaction 2 RCNO+ 2 H20 → RNHCONHR+ C
With O2↑, a soft urethane foam can be obtained, but in this case, heating and humidification accelerate the oxidation reaction.

On the other hand, urethane foam and soft urethane in a fluid state before curing are composed of two liquids, a base agent and a curing agent, and are easy to use if they start reacting after being mixed and left for about 10 minutes.

In this way, the fluid silicone or soft urethane is foamed and hardened to obtain the foamable backing material 1o. As described above, by forming the backing material 10 directly on the duct coupling member 8, which is the object to be sealed, adhesive force is generated between the two, and once again,
It is easy to assemble as there is no need to use adhesive. Still, as mentioned above, the first point is simple in terms of the object to be sealed and the structure.
Since the backing material 10 can be formed with the second jig 11 and 13, if a large number of jigs are prepared, it can be easily manufactured even if the reaction time for - pieces of the backing material 1o takes several hours. .

The first jig 11 shown in FIG. 4 is made of rubber, which is an elastic material. As a result, variations in the dimensions of the molded product of the duct coupling member 8 can be followed by elasticity.

On the other hand, the second jig 13 has a rubber member 13 made of an elastic material.
A is used which is integrated with the metal plate 13b by baking molding. In this way, variations in the dimensions of the object to be sealed can be accommodated by the elasticity of the rubber member 13a, and the existence of the metal plate 13b prevents the entire second jig 13 from being deformed by the load of the weight 16. Moreover, since they can be stacked in several stages and left undisturbed, they have the advantage of not taking up a large space during the curing reaction, which takes a long time.

Furthermore, one of the two jigs 11 and 13, for example, the first jig 11, is made of soft rubber with a hardness of about 40 to 60°Hs, and the other, for example, the second jig 13, is made of soft rubber with a hardness of 60 to 8o0H8.
If the first jig 11 and the second jig 1 are made of a combination of different hardnesses, such as being made of rubber with different hardness, the first jig 11 and the second jig 1
Since the joining portion with the backing material 10 can be tightly adhered, the backing material 10 can be molded with high precision and a clean appearance.

As described above, fit the first jig 11 into the object to be sealed,
Furthermore, a foam is injected into the space formed by joining the second jig 13 to the first jig 11 and is foamed and hardened. The joint between a certain duct engaging member 8 and the first jig 11, the joint between the duct coupling member 8 and the second jig 13, or the joint between the first jig 11 and the second jig 13. There is a risk that the foam material may flow out from the joints due to the pressure caused by foaming, resulting in cracks. If cracks appear on the outer periphery of the backing material 1o, the appearance performance will be poor and problems will arise in achieving watertightness and airtightness. In order to solve the above-mentioned problem, as shown in FIG. 6, for example, a protrusion 11a having a V-shaped cross section is integrated into the outer peripheral end of the first jig 11 in a loop shape so that the side surface corresponds to the space 14. to form.

From now on, 1st. When the second jigs 11 and 13 are joined together, the rib portion corresponding to the top of the protrusion 11a becomes a thin portion, and after hardening, the rib can be easily cut by pulling the tip side of the rib. Since unnecessary particles can be easily and reliably removed in this way, it is possible to improve the appearance performance of the backing material 1o, and also to improve reliability in terms of airtightness and watertightness in the sealing part. You can increase your sexuality.

Furthermore, by providing the protrusion 11a, the protrusion 11a
1st inward. A space 16 is formed between the second jigs 11 and 13, and excess foam material tends to flow into this space 16 due to the deformation of the protrusion 11a. Lifting up is reduced, and dimensional accuracy in the thickness direction of the backing material 10 can be easily achieved.

Furthermore, by forming an air vent hole 17 in the first jig 11 that communicates the joint surface with the second jig 13 and the inside of the sealed body, the pressure during foaming is discharged to the outside through the air vent hole 17. This makes it possible to more reliably prevent the object to be sealed from lifting up.

Furthermore, the protrusion 11a of the first jig 11 has a loop shape, but by providing notches at multiple locations along the loop,
Since the excess material of the foam can easily flow into the space 16 through the cutout, the dimensional accuracy of the backing material 1o in the thickness direction can also be improved.

Effects of the Invention As described above, according to the present invention, since the backing material can be formed of a foam, it has good shape conformability to the complicated shape of the object to be sealed, the difference in compressive force during installation, etc., and the water sealing effect is improved. Moreover, since the backing material can be molded directly onto the object to be sealed, it is possible to obtain a backing material that matches the shape of the object to be sealed, and the adhesion of the backing material to the object to be sealed can be obtained. The work is unnecessary, and the first. Since the second jig is made of elastic materials with different hardnesses, it is possible to closely connect both jigs, and as a result, the backing material with uniform thickness can be formed with good mass production. Its industrial value is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a clothes dryer, Fig. 2 is a sectional view showing the state in which the backing material is assembled in an embodiment of the present invention, and Fig. 3 is the state in which the foam is injected before the backing material is molded. FIG. 4 is a cross-sectional view showing the state of the same backing material during molding, and FIG. 5 is a cross-sectional view showing another example during the same molding. 8...Duct coupling member (sealed body), 1o...
...Backing material, 11.14...1st.
Second jig, 11a...Protrusion, 14...
·space. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (5)

[Claims] (1) A first jig attached to the object to be sealed, and a 20th jig for molding the foam that is bonded to the first jig and injected into the space formed between the object to be sealed. A backing material molding apparatus, comprising: both jigs made of elastic materials having different hardnesses. (2) First. The hardness of one of the second jigs is 40 to 60.
The apparatus for molding a backing material according to claim 1, wherein the backing material is 6O-800H8. (3) A patent claim in which at least one of the first and second jigs is formed with a loop-shaped protrusion having a V-shaped cross section so that the side surface faces the space and is the joint between the two jigs. A molding device for a backing material according to item 1. (4) A first jig is located inside the body to be sealed, and the first jig has a connection surface between the joint surface with the second jig and the body to be sealed. The apparatus for molding a knocking material according to claim 1, wherein an air vent hole is formed. (5) A protrusion having a V-shaped cross section is formed in at least one of the first and 20th jigs in a loop shape at the joint between the two and with the side surface facing the space; 1. A device for forming a binding material according to claim 1, wherein a notch is formed at an appropriate position of the loop-shaped protrusion.