JPH0411769Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a cast molding device for molding a bathtub with an apron using a molding material that hardens at room temperature.

[Prior art and its problems]

Conventionally, bathtubs with aprons that have a wall thickness of 5 mm or more in order to give a sense of texture and volume are made by joining the bathtub part X and the apron part Y, which are cast using separate casting equipment, through a lining material 100. A reinforcing material 101 is installed between the back surface of the bathtub section X and the back surface of the apron section Y, and the product is provided (FIG. 9).

However, since it requires two casting machines, it not only has the problem of rising equipment costs, but also requires the application of the lining material 100 and the erection of the reinforcing material 101, which is very time-consuming and reduces production efficiency. has a bad problem.

[Technical issues]

The technical problem of the present invention is to cast a bathtub with an apron with a reinforced lining using a molding material that hardens at room temperature.

[Technical means]

The technical means of the present invention are as follows.

A lower mold is formed by providing an apron molding surface that continuously rises from the edge of the upper molding surface on a male mold part that has a tank molding surface and an upper edge molding surface that is continuous with the molding surface. Then, mold an upper mold that secures a molding space between the apron molding surface of the lower mold and the tank molding surface excluding the space formed by the tank molding surface portion opposite to the apron molding surface. , a removable device that enters into the space and secures a molding space between the apron molding surface, the tank molding surface portion facing the apron molding surface, and the upper edge molding surface existing between the two. This was achieved by installing a backing reinforcing strip material.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

In this embodiment, the cast molding apparatus for the bathtub with apron includes a lower mold A ₁ (hereinafter referred to as a resin lower mold A ₁ ), an upper mold A ₂ (hereinafter referred to as a resin lower mold A ₂ ), and a mold made of the resin. Backing reinforcing strip material A ₃ that is removably attached to the upper mold A ₂
(apron type).

Resin lower mold A ₁ is tank molding surface 1 (product surface)
An apron molding surface 3 (product surface) is formed from the edge of the upper molding surface 2 of the male mold part A ₁ ′, which has an upper molding surface 2 (product surface) continuous with its molding surface 1. By doing so, a space 5 for fitting the backing reinforcing strip material A ₃ (apron mold) is formed in the lower part from the tip of the apron molding surface 3.

This mold matching space 5 consists of three parts 2: an apron molding surface 3, an upper edge molding surface 2 continuous to the base end of the apron molding surface 3, and a tank molding surface portion 1' facing the apron molding surface 3; This is a part consisting of 3 and 1'.

When the resin upper mold A ₂ is molded to the resin lower mold A ₁ , the molding surface 1 of the tank part is removed except for the mold matching space 5.
It is formed into a substantially hat-shaped cross section with a molding surface 4' on the inner surface in order to secure a molding space 4 between the two.

The backing reinforcing strip material A ₃ (apron type) is made by cutting a block of foamed urethane or the like having a cushioning reinforcing function, so that the three members 2, 3, 1' ( The size and length are such that a molding space 4 is secured between the apron molding surface 3, the upper edge molding surface 2 continuous to the apron molding surface 3, and the tank molding surface portion 1') facing the apron molding surface 3. It is formed.

In addition, this backing reinforcing strip material A ₃ is made of resin upper mold A ₂
It is removably attached to the body via attachment means 6.

The mounting means 6 is a mold matching space 5 on the resin upper mold _A2 .
The bolt 6c is inserted through the through hole 6a and has a threaded portion 6b at its tip that is screwed into the strip material _A3 . The rotation serves to separate the strip material A ₃ from the resin upper mold A ₂ and leave it in the mold matching space 5.

In addition, in this embodiment, a positioning guide protrusion is provided on the hole edge of the through hole _6a on the side of the mold matching space 5 so that the backing reinforcing strip material _A3 can be set in the proper position of the resin upper mold A2. A recess 8 is provided on the upper surface of the strip material A ₃ corresponding to the guide protrusion 7, and the strip material A ₃ is set with the two parts 7 and 8 fitted together.

Incidentally, the resin upper mold A ₂ includes a lifting bolt 9 for demolding and an opening/closing mold 1 for injecting the molding material C.
0, the above mold A ₂ and the resin lower mold A ₁ are respectively provided with compressed air jetting parts 11 and 12 for demolding, and both molds A ₁ and A ₂ are set on a vibration table 13. ing.

The lifting bolt 9 is screwed into each side of the upper mold A ₂ corresponding to the lower mold A ₁ so that it can move forward and backward, and rotates with the lower end in contact with the engagement surface of the lower mold A ₁ . If you do so, it will serve to levitate only the upper mold _A2 .

The compressed air blowing parts 11 and 12 are provided on the molding surface 4' of the upper mold _A2 and the tank molding surface ₁ of the lower mold A1.

The compressed air blowout part 12 provided in the upper mold A ₂ has holes 14 in each wall that constitutes the upper mold A ₂ , and an air supply hose connected to a compressed air supply device (not shown) is connected to the hole 14. 15 are connected to each other, and the hose 15 is provided with a check valve 16 to close the molding space 4.
This prevents the molding material C poured into the molding material from flowing backward.

The compressed air blowing part 11 provided on the lower mold A ₁ has a protruding part 17 formed on the top of the lower mold A ₁ , and a hole 18 is formed in the raised part 17 .
A check valve 20, which is raised and opened by air pressure from an air supply hose 19 connected to the hole 18, is provided on the top surface of 7 and is movable back and forth.

The check valve 20 has a valve body 20'' fixed to the upper end of a guide shaft 20' that loosely fits into the hole 18.
0'' is provided with a direction changing recess 21 on the bottom surface which communicates with the hole 18, and the function of this direction changing recess 21 is to send compressed air to the tank molding surface ₁ of the lower mold A1. Has a function.

The vibration table 13 is a truck equipped with a vibrator, and holds the lower die A ₁ and the upper die A ₂ together with a base plate 23 via a clamp 22 .

Note that 24 is a weight, and 25 is a guide for demolding.

Next, the molding order when molding a bathtub with an apron using the cast molding apparatus in this embodiment will be explained.

After coating the transparent layer C' on the molding surface 1 of the tank part of the lower mold A ₁ and curing the transparent layer C', the molding material C is evenly poured into the molding space 4 with the openable mold 10 in the open state. Close the injection port with .

The transparent layer C' is made of a transparent unsaturated polyester resin to which certain curing agents, accelerators, etc. are added.

Molding material C is formed by mixing an unsaturated polyester resin with an antifoaming agent, an accelerator, a filler (glass powder), a hardening agent, and a color pigment.

Since air gets mixed in when pouring the molding material C, the vibrating table 13 is vibrated for about 5 minutes to bleed out the air and excess molding material C is discharged from the air vent hole 10' of the opening/closing mold 10, and then left for about an hour. ,
Wait for hardening.

Reinforced strip material A ₃ backed by attachment means 6 after curing
is separated from the upper mold A ₂ .

At this time, the lining reinforcing strip material A ₃ is left between the back sides of the apron portion d ₁ of the bathtub molded body D to be molded.

After releasing the clamp 22, the bolt 9 for lifting the upper mold is rotated, and almost at the same time, compressed air is supplied from the compressed air blowing part ₁₂ provided on the upper mold _A2 to the molding surface 4' of the upper mold A2. At the same time as sending out the lifting bolt 9
Due to the function of the bathtub molded body D and the molded surface 4'
The upper mold A ₂ is removed from the mold via a rear lifting device (not shown). Next, compressed air blowing section 1
1 to the bathtub molded body D, molding surface 1,
2 and 3 to remove the bathtub molded body D from the mold.

The bathtub legs 27 are fixed by lining them with a resin composition and glass fibers, as shown in FIG.

Figures 5 and 6 show other examples of the backing reinforcing strip material _A3 .

When this backing reinforcing strip material A ₃ is molded into the mold matching space 5 of the lower mold A ₁ , the apron molding surface 3 and the tank molding surface portion 1 facing the apron molding surface 3 are formed in the space 5 . 'The communication groove 28 that communicates with
is opened in the length direction, and when this strip material A ₃ is used, the apron part d ₁ of the bathtub molded body D
A bridge portion 29 is formed between the back surface and the back surface of the tank portion _d2 , which the apron portion _d1 faces, thereby further increasing the strength.

Incidentally, in this embodiment, bolts 6c that are manually removed as the attachment means 6 are explained, but the bonding strength is weaker than the bonding strength to the extent that the bolts 6c separate from the upper mold A ₂ during demolding, that is, the bonding strength to the bathtub molded body D. It may also be bonded to the upper mold A ₂ with adhesive force through the adhesive 30. In this case, the backing reinforcing strip material A ₃ can be disposed on the back side of the apron portion d ₁ at the same time as demolding without requiring any manual removal work, making the molding process easier.

[Function and effect of the idea]

As described above, the present invention has an apron molding surface that rises continuously from the edge of the upper molding surface on the male mold part that has a tank molding surface and an upper edge molding surface that is continuous with the molding surface. to form a lower mold, and secure a molding space between the apron molding surface of the lower mold and the tank molding surface except for the space formed by the tank molding surface portion facing the apron molding surface. The upper mold is molded together, and the upper mold is provided with an apron molding surface that enters the space, a tank molding surface portion facing the apron molding surface, and a molding space between the upper edge molding surface existing between the two. A removable backing reinforcing strip material is installed to ensure the following effects.

After filling the molding material into the molding space and curing it,
Reinforced strip material from resin upper mold (apron type)
By separating the , a bathtub with an apron with reinforced lining is integrally molded.

Therefore, unlike in the past, there is no need to prepare separate casting equipment for the bathtub and apron, or to perform the work of joining lining materials and erecting reinforcing materials for the bathtub and apron, reducing equipment costs. We can expect a drastic reduction in costs and a drastic improvement in production efficiency.

The back of the apron part of the bathtub molded body is removed from the mold with a reinforcing lining strip material filled in advance. The apron portion and the upper edge surface portion connected to the apron portion are protected.

Therefore, when compressed air is pumped, the apron part where compressed air is difficult to escape and the upper edge part connected to it will not deform even if air pressure is applied locally, making it possible to create an apron with excellent durability without cracking. You can mold a bathtub.

Thus, the intended purpose can be achieved.

[Brief explanation of the drawing]

The drawings show an embodiment of the cast molding apparatus of the present invention, in which Fig. 1 is a longitudinal sectional view, Fig. 2 is a longitudinal sectional view showing the state in which the mold is being cast, and Fig. 3 shows the state in which the upper mold has been removed. Fig. 4 is a perspective view of the reinforcing lining strip material, Fig. 5 is a perspective view of another reinforcing lining strip material, and Fig. 6 shows the state of casting using the reinforcing lining strip material. 7 is a partially enlarged sectional view showing the other side of the attachment means, FIG. 8 is an enlarged sectional view of the bathtub leg portion, and FIG. 9 is a partially enlarged sectional view of a conventional example. In addition, in the figure, A ₁ ... lower mold, A ₂ ... upper mold, 1 ...
Tank molding surface, A1 _' ...Male mold part, 3...Apron molding surface, 5...Mold matching space, 4...Molding space,
A ₃ ...Backing reinforcing strip material, 2...Top edge molding surface,
C... Molding material.

Claims (1)

[Scope of utility model registration request] A lower mold is formed by providing an apron molding surface that continuously rises from the edge of the upper molding surface on a male mold part that has a tank molding surface and an upper edge molding surface that is continuous with the molding surface. Then, mold an upper mold that secures a molding space between the apron molding surface of the lower mold and the tank molding surface excluding the space formed by the tank molding surface portion opposite to the apron molding surface. , a removable device that enters into the space and secures a molding space between the apron molding surface, the tank molding surface portion facing the apron molding surface, and the upper edge molding surface existing between the two. A casting molding device for a bathtub with an apron, characterized in that a backing reinforcing strip material is attached.