JPH0323252B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bonding device for a fugitive model (hereinafter simply referred to as a model) used in casting a casting.

[Prior art] Conventionally, as the above-mentioned model bonding method, the eighth method has been used.
Various methods as shown in Figs. to 11 have been carried out.

In FIGS. 8 and 9, 61 and 62 are two models to be bonded, respectively, and 63 and 64 are bonding surfaces, respectively.

The models 61 and 62 are generally made of polystyrene foam. Next 65
is an adhesive mold formed in the same shape as one of the models 61 and 62, for example, the same model 62, and an adhesive 67 is applied to the adhesive surface 66 of this mold 65, which corresponds to the adhesive surface 64. The adhesive 67 is applied to the attachment surface 63 of the model 61 by aligning the adhesive 67 with the corresponding model 61 as shown by arrow A65, and then attaching the adhesive 65 to the model 61. Then, as shown in FIG. 9, another model 62 is adhered to the model 61 to which the adhesive 67 has been applied, with its adhesive surface 64 aligned.

Another method is shown in FIGS. 10 and 11. In Figure 10,
First, place the adhesive dispenser 6 on the adhesive surface 63 of the model 61.
8, the adhesive 67 is discharged and attached, and then another model 62 to be bonded to this model 61 is placed and bonded as shown in FIG. 11.

[Problems to be Solved by the Invention] However, the various bonding methods described above each have the following drawbacks. That is, in the case of the method shown in FIGS. 8 and 9, the mold 65 for applying the adhesive 67
It is troublesome to manufacture. Furthermore, if the model is changed, the mold 67 must also be remade, which is troublesome.

Furthermore, in the method shown in FIGS. 10 and 11, during adhesion, it is necessary to sequentially apply to the adhesive surface 63 from the start point to the end point using the dispensing device 68, which does not improve work efficiency.

This invention was made to solve the above-mentioned difficulties, and its purpose is to eliminate the trouble of manufacturing the mounting mold 65 as described above, and to eliminate the need to rebuild the mounting mold even when the model is changed. To provide a model bonding device which can omit troublesome work and can efficiently apply adhesive to the entire surface at once instead of applying the adhesive to parts sequentially.

[Means for Solving the Problems] This invention which achieves the above object is described as follows: an adhesive, a tank containing the adhesive and having a heater, and a flexible container having a number of holes for holding the adhesive. This is an adhesive device for models made of porous material.

Further, the porous body is a bonding device for the model, which includes a reheating heater that heats and melts the adhesive held in the porous body.

Further, the porous body is a bonding device for the model, which is a net.

Further, the porous body is an adhesive device for the fugitive model having a mechanism for suspending the porous body.

[Function] When adhesive is held in each of the many holes of a flexible porous body and the adhesive surface of the model is brought into contact with this porous body, the adhesive is transferred from each of the many holes to the adhesive surface of the model. ,adhere to.

Next, another model to be bonded is brought into contact with this model and bonded.

Further, the adhesive is applied to each bonding part of a plurality of models to be bonded through a large number of holes in the porous body, and then the bonding parts are brought into contact with each other and bonded.

Further, a hot melt adhesive is melted in a tank having a heater, the molten hot melt adhesive is held in the pores of the porous body, and a plurality of models to be adhered to the porous body are brought into contact with each other to adhere the adhesive to each. , the same models are glued together.

Also, a net is used as the porous body and the model is adhered as described above.

Further, each of the adhesion may be performed while the porous body is in a suspended state. By doing so, even if the adhesive portion of the model has three-dimensional changes, the adhesive can be applied favorably.

[Example] In FIGS. 1 and 2, 1 is a tank for adhesive 2, and has a heater 3. As the adhesive 2, a normal solvent type adhesive may be used, but preferably a hot melt adhesive is used. The adhesive is an adhesive that solidifies at room temperature and melts at approximately 60 to 100°C, and its formulation is well known and will therefore be omitted. 4 is a roller, 5 and 5a are heater rollers having a built-in heater, and 6 is a squeegee as shown in FIG. 7 is a flexible porous body, and in the example, a synthetic fiber net was used.

The porous body 7 may be a metal net, a natural fiber net, or a cloth, or may be a porous body made of punched metal, or an elastic body such as rubber or polyurethane. The holes may not penetrate through the front and back, but may simply be a large number of recesses. In this way, it is formed into a substantially sheet shape, a substantially thin plate shape, or the like. Next, 8 is a locking part, which is gripped by a pull-down device 9. The device 9 has a grip part 19 that can be opened and closed, and can be moved up and down, and is raised to the position of the locking part 8 shown in FIG. It is now possible to pull it down to the position and release it.

Note that 11 is a string, but it may also be a wire, chain, or the like. 12 is a weight. and the roller 4,
The heater rollers 5 and 5a are adapted to rotate idly, respectively. The heater roller 5a is driven in the direction of lowering the weight 12, and can idle in the opposite direction.

Further, the squeegee 6 is designed so that the gap 13 thereof can be adjusted.

Reference numeral 14 denotes a reheating heater, which is movable in the direction of the plane of the paper and the back of the paper. Reference numeral 15 denotes a holding section for the model 16, which can be moved in opposite directions by a fluid pressure device 17 such as hydraulic pressure or pneumatic pressure.

In FIG. 2, the hot melt adhesive in the tank 1 is being melted by the heater 3, and the heater rollers 5, 5a are generating heat. Glued model 16
is removed, the holding portions 15 are opened in the direction away from each other as shown in FIG. 1, and the models 16, 16 to be bonded are held therein. 1, close the gripping part 10 to grasp the locking part 8, and pull it down to the position of the locking part 8 shown in FIG. Then, open the gripping part 10 and release it. In this case, the hot melt adhesive
As shown in the figure, it is adhered in the form of a film to the pores 18 of the porous net due to its surface tension.

Since the adhesive is easily solidified, the reheating heater 14 is moved from the paper back direction to narrow the porous body 7 with a gap therebetween, heat that surface, and remelt the adhesive.

Next, the reheating heater 14 is moved away from the back of the paper,
The fluid pressure device 17 is actuated to move the holding parts 15 toward each other so that the holding parts 15 come into contact with each other so as to sandwich the porous body 7, and the adhesive is applied thereto. Then, the holding parts 15 are moved backward from each other, and the heater roller 5a is
is driven to lower the weight 12. As a result, the porous body 7 is pulled up. Next, the holding parts 15 are moved in a direction closer to each other, the models 16 are brought into contact with each other and bonded, and the models 16 are taken out from the holding parts 15.

Next, instead of the pull-down device 9, as shown in FIG.
9, and a ratchet wheel 20 is provided on the heater roller 5.
It is formed so as to be driven in the direction in which the porous body 7 is taken down. Note that the other side is formed to idle. 2
1 and 22 are dancer roles.

This device was also constructed as shown in FIG. 5 as another embodiment. That is, the porous body 7 is provided intermittently between the endless belts 23, 23. 24
is the drive wheel, which is rotated intermittently. Note that the reheating heater 14 is not shown in the figure.

Adhesion of the model is carried out in the space 25. By forming in this way, it is possible to form efficiently, although intermittently.

Furthermore, although not shown in the drawings, the porous body 7 may be formed of a metal net or the like, and may itself be formed to generate heat using electric power or the like. By doing so, the reheating heater 14 and the device for moving it can be omitted.

Furthermore, if the porous body 7 is of a suspended type as shown in the figure, even if the adhesive part of the model 16 has a three-dimensionally complicated shape, the adhesive can be applied favorably.

Next, the porous body 7 may be formed by forming a large number of through holes or depressions in a thin plate of metal, synthetic resin, or the like.

Although the detailed mechanism is omitted, when the porous body 7 is pulled up in FIGS.
It stops at the position shown in the figure, and when pulled down, it stops at the position shown in Figure 1.

Next, the heater roller 5a may be a winding roller using a spring. By doing so, the weight 12 can be made unnecessary. Further, as the reheating heater 14, a ceramic panel heater is used as an example.

Although this invention is used for adhering models for casting, it goes without saying that it is not limited to this and may be used for a wide range of other items that require adhesion.

[Effects of the Invention] The present invention is configured as described above, and by bonding the model with an adhesive and a flexible porous body having a large number of holes for holding the adhesive, it is possible to achieve the same effect as shown in the conventional example. It is possible to omit the troublesome effort of manufacturing a mold for attaching adhesive to a model. Furthermore, when the model is changed, the troublesome effort of rebuilding the mold can be omitted. In addition, the adhesive is not applied to parts one after another, but can be applied to the entire surface of the attachment part at once, so that work efficiency can be improved.

Furthermore, in the case where the porous body is suspended and the adhesive is applied, the adhesive can be applied satisfactorily even if the surface of the adhesive part has a three-dimensional change.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a diagram showing an outline of a fugitive model bonding device, FIG. 2 is a diagram showing the device in FIG. 1 in a different state from FIG. 1, and FIG. The figure shows a second embodiment of the invention, a perspective view of a portion of the device, FIG. 4 is an enlarged perspective view of the portion of FIG. 1, and FIG. 5 shows a third embodiment of the invention. FIG. 6 is an enlarged front view of the part shown in FIG. 1, FIG. 7 is a front view of the fugitive model bonded according to the present invention, and FIGS. 8 and 9 are respectively FIGS. 10 and 11 are diagrams showing steps of other conventional bonding methods, respectively. 1...tank, 2...adhesive, 3...heater, 7...
... Porous body, 14 ... Reheating heater, 16 ... Vanishing model.

Claims (1)

[Scope of Claims] 1. A fugitive model bonding device comprising an adhesive and a flexible porous body having a large number of holes for holding the adhesive. 2. A fugitive model bonding device comprising an adhesive, a tank having a heater for accommodating the adhesive, and a flexible porous body having a large number of holes for holding the adhesive. 3. The fugitive model bonding device according to claim 2, wherein the porous body has a reheating heater that heats and melts the adhesive held in the pores of the porous body. 4. The fugitive model bonding device according to claim 1, 2 or 3, wherein the porous body is a net. 5. The fugitive model bonding device according to claim 1, 2, 3 or 4, wherein the porous body has a mechanism for suspending the porous body.