JPH06217B2 - Object bonding device using hot melt adhesive - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adhering an object using a hot melt adhesive which is widely used in various manufacturing industries.

2. Description of the Related Art A hot-melt adhesive that has been heated and melted is applied to one or both of the objects to be adhered by a brush or the like, and then the two are brought into contact with each other before they are solidified. Since the hot melt adhesive itself is widely known at present, the description thereof will be omitted.

However, the above-mentioned conventional methods generally have the following drawbacks. The hot-melt adhesive that is melted and held on the brush is solidified at room temperature in a very short time, so that the so-called pot life that can be used for the bonding work is extremely short. For this reason, the same bonding work must be performed quickly, and therefore the work is not easy.

The present invention has been made in order to improve the above-mentioned drawbacks, and an object thereof is to prolong the pot life of a hot-melt adhesive as compared with the conventional method, thereby making the work easier than before. It is also an object of the present invention to provide a device for adhering an object using a hot melt adhesive, which can be facilitated.

Means for Solving the Problems This invention that achieves the above-mentioned object is described as follows. It is a container of a hot-melt adhesive having a heater, and the container is vertically movably provided in the container, and the axial direction is the vertical direction. It is an apparatus for adhering an object using a hot melt adhesive, which comprises a heat guide member formed of a large number of cylindrical bodies and a porous member provided at the upper end of the guide member. And the said guide member has a ventilation hole in the side wall as an example. Further, the upper end of the cylindrical body is formed to have a substantially mountain-shaped cross section as an example. Also, the porous member may be a mesh or a metal mesh. Further, the guide member may be replaced with a substantially box-shaped heating body having a built-in heater. The object to be bonded may be a vanishing model for casting casting.

Action A hot melt adhesive is placed in the container and heated and melted by a heater in advance. Next, the guide member is immersed in the molten photomelt adhesive. In this case, the porous member is also immersed. Next, the porous member is allowed to come out of the hot melt adhesive, and a part of the guide member is allowed to enter the hot melt adhesive,
The guide member guides the heat generated by the hot-melt adhesive to the hot-melt adhesive attached to the porous member to give the heat to the hot-melt adhesive, and prevents the solidification of the hot-melt adhesive while the one of the objects to be attached to the porous member is , Or touch both,
A hot melt adhesive is applied, then both are contacted and bonded.

Embodiment 1 In FIGS. 1 and 2, reference numeral 1 denotes a container, which is made of metal or the like, is mounted on a base 2 made of Teflon resin as an example, and a heater 3 is provided outside the bottom thereof.
Reference numeral 4 denotes a guide member housed in the container 1, on which a porous member 5 is provided, and the member 4 is attached to a vertical movement device 6 provided outside the container 1,
This allows it to be moved up and down. The vertical movement device 6 is formed by an air cylinder as an example, and is connected to a compressor (not shown). Reference numeral 7 indicates the pipe. The guide member 4 and the porous member 5 form an attachment member 8. Reference numeral 9 is a spring, 10 is a piston rod, 11 is a bracket provided on the guide member 4, and 12 is an arm of the vertical movement device 6. Reference numeral 13 represents a holding portion for the spring 9.

Although the guide member 4 is formed of a stainless plate as an example, it may be formed of an outer iron plate, an aluminum plate, a copper plate, a brass alloy plate, or the like.
Reference numeral 14 indicates a reinforcing member (Fig. 2). As shown in FIG. 3, the upper end of the guide member 4 is formed in a mountain shape in cross section. This is because if the portion is formed in a flat shape, a large amount of the hot melt adhesive is held in that portion, which causes a difference from other portions, and is for preventing it. Next, 15 is a large number of tubular portions (FIG. 2) formed on the guide member 4.
Vents 16 (FIG. 3) are formed in the upper portions of the respective parts 15 to prevent the pressure fluctuation in each cylindrical part 15 due to the vertical movement of the adhering member 8, which will be described later.

Note that the guide member 4 may be formed of a heat resistant synthetic resin or the like.

A porous member 5 is provided on the guide member 4. As the porous member 5, for example, a net made of stainless steel was used. The porous member 5 is not limited to the above, but may be a net made of synthetic fiber or the like, or a porous body, a punching metal or other appropriate porous body made of various materials or a foam body, or any other suitable sheet. A plate-shaped or plate-shaped porous member may be used.

In the present invention, the porous member 5 includes both a plate-shaped body and a sheet-shaped body. In addition, it does not matter whether they have flexibility or not.

Next, FIG. 4 shows another embodiment of the present invention. In FIG. 4, 18 is an example of a porous member which is formed of punching metal or a metal mesh having a relatively open mesh and which has appropriate rigidity. , 19 is an elastic porous material layer formed of, for example, a curl mesh of Tetron fibers (a porous body made of curled fibers) and the like, and 5 is the porous member. It does not matter if the adhesive surface has irregularities. Note that the elastic porous material layer 19 may be a porous body formed of an appropriate synthetic fiber other than the above, or rubber,
Alternatively, a flexible synthetic resin porous body may be used.

Next, FIG. 6 shows a further embodiment of the present invention, in which 21 is a heating body in which a heater 3 is liquid-tightly contained, and 22 is a heating body 21 and a porous member 5. It is an adhesive member to be moved up and down by the up-and-down moving device 6.

Note that reference numeral 23 is a conducting wire and is insulated. 24 indicates a passage.
Further, in FIG. 1 and FIG. 6, reference numeral 25 denotes an object to be bonded, which is, for example, a disappearing model for casting casting, which is generally formed of expanded polystyrene. Further, in FIG. 1, 26 is a column, 27 is a cover made of silicone rubber as an example, 28 is a doorway provided by forming a notch in a vertical direction in the shape of goodwill, and 29 is formed in this way. It is a greenhouse. It does not matter if the same room 29 is not provided, but it is possible to perform the bonding work more effectively if it is provided.

The operation will be described with reference to FIG. 1. First, the hot melt adhesive 30 in the container 1 is melted by the heater 3. Next, the vertical movement device 6 is operated to raise the guide member 4 in the direction of arrow A4, and the porous member 5 is caused to come out of the liquid surface 31 of the hot melt adhesive 30. In this case, the object 25 to be bonded is previously positioned above the liquid surface 31. 32 is a holding member of a device (not shown) for holding and moving the object 25, and 33 is an elastic member of the member 32.

Then, as shown in FIG. 5, the porous member 5 is brought into contact with the object 25, and the hot melt adhesive 30 is attached to the object 25.

And in this case, the lower part of the guide member 4 is immersed in the liquid of the adhesive 30 as shown in the figure, so that the tubular portion 15 holds the heat provided by the hot melt adhesive 30,
This is continuously applied to the hot melt adhesive on the porous member 5. For this reason, the hot melt adhesive on the member 5 does not solidify and is adhered on the object 25.
Further, in this case, the spring 9 helps to adhere the adhesive 30 evenly.

Next, the object 5 is raised in the direction of arrow A4 by a device (not shown). At the same time, it is rotated 90 ° in the direction of arrow A25 and stopped at the position indicated by 25a. Then, another object 25b to be adhered thereto, as an example, the disappearance model is moved as shown by an arrow A25b, and adhesion is performed. Since the heater 3 is built in the heating body 21 in the apparatus shown in FIG. 6, the heating body 21 may be entirely allowed to come out from the liquid surface 31 of the hot melt adhesive 30. The other operations are performed in substantially the same manner as that shown in FIG.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it has the following effects. A hot-melt adhesive container having a heater is provided with a heat guide member composed of a large number of cylindrical bodies whose axial direction is the vertical direction, and a porous member is provided at the upper end portion of the guide member, thereby The heat of the hot melt adhesive in the container can be guided to the hot melt adhesive adhered to the conductive member to prevent the hot melt adhesive from solidifying, and the pot life can be extended. .

Further, since the guide member is formed of a large number of cylindrical bodies, it is possible to effectively guide heat. Further, since the tubular body has the vent hole formed in the side wall thereof, it is possible to prevent the pressure inside the tubular body from fluctuating as the tubular body moves up and down. Further, since the cylindrical body has a substantially mountain-shaped cross section at its upper end, it is possible to prevent the amount of the hot melt adhesive adhering to the porous member from becoming uneven. Further, by using a net for the porous member, the amount of the hot melt adhesive adhered to the porous member can be made substantially uniform.
In addition, when the porous member is formed of a metal net, the durability can be further increased. In addition, the heating member provided with the porous member can further prolong the pot life of the hot melt adhesive adhered to the porous member. Moreover, what made the disappearing model for casting casting the object to be bonded,
The disappearing model can be bonded well.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and is a schematic view of an apparatus for adhering an object using a hot melt adhesive, and FIG.
FIG. 3 is a plan view of the portion shown in FIG. 3, FIG. 3 is an enlarged detailed view of the portion shown in FIG. 1, FIG. 4 shows another embodiment of the present invention, and is a diagram corresponding to FIG. 3, and FIG. FIG. 6 is an enlarged view of a leaf portion of the device shown in FIG. 1 different from FIG. 1, and FIG. 6 is a view corresponding to FIG. 1 showing still another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Container 3 ... Heater 4 ... Guide member 5 ... Porous member 15 ... Cylindrical body 16 ... Vent 21 ... Heating body 30 ... Hot melt adhesive

Claims (7)

[Claims] 1. A container of hot melt adhesive having a heater, a heat guide member composed of a large number of cylindrical bodies vertically movable in the container and having an axial direction as a vertical direction, and the guide. An object adhering device using a hot-melt adhesive, characterized in that it comprises a porous member provided at the upper end of the member. 2. An apparatus for adhering an object using a hot melt adhesive according to claim 1, wherein the tubular body has a ventilation hole in its side wall. 3. An apparatus for adhering an object using a hot melt adhesive according to claim 1 or 2, wherein the cylindrical body has an upper end formed in a substantially mountain-shaped cross section. 4. The apparatus for adhering an object using a hot melt adhesive according to claim 1, 2 or 3, wherein the porous member is a mesh. 5. The porous member is a net made of metal,
An apparatus for adhering an object using the hot melt adhesive according to 2 or 3. 6. A container of hot melt adhesive having a heater, a substantially box-shaped heating body having a built-in heater provided in the container so as to be movable up and down, and provided at an upper end portion of the heating body. And a porous member for adhering an object using a hot melt adhesive. 7. An apparatus for adhering an object using a hot melt adhesive according to claim 1, 2, 3, 4, 5, or 6, wherein the object to be adhered is a disappearing model for casting casting.