JPH0727134Y2 - Lightweight upper mold used for manufacturing artificial marble etc. - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight upper mold used for manufacturing artificial marble or the like for a surface plate of a wash basin, a vanity table or a counter table.

[0002]

2. Description of the Related Art When a surface plate of a wash basin, a vanity table or a counter table is manufactured by using artificial marble, a lower mold (a front mold) having a predetermined shape (usually a quadrangle) having a certain depth is called. ) And an upper mold (referred to as a back mold) that fits into the front mold for a predetermined length, and a predetermined amount of a compound in which a predetermined raw material such as resin and aggregate is mixed into the lower mold, and An artificial marble plate is manufactured by inserting the upper mold, holding the upper mold and the lower mold with a simple vise, and solidifying the compound.

[0003]

However, it is necessary for the upper mold to be inserted and removed every time one artificial marble is manufactured, and the conventional upper mold is prevented from being deformed due to warping or bending. For this purpose, plywood is used in the middle part, and FRP using glass fiber is used on both sides.
Since the upper surface is fixed by a square pipe of 0x2.3t, etc., it is extremely heavy, requires multiple workers for transportation, causes problems such as low back pain, and is poor in workability. There was a problem. The present invention has been made in view of the above circumstances, and an object thereof is to provide a lightweight upper mold used for manufacturing an artificial marble or the like which is light in weight and has little deformation even when used for a long period of time.

[0004]

A method according to the above-mentioned object.
The lightweight upper mold used in the production of the artificial marble described above has a relatively thick and lightweight hard foamed plastic disposed in the middle portion, and a fiber sheet having strength such as carbon cloth above and below and having small elasticity. A reinforced plastic layer using layers is formed and configured.

[0005]

In the lightweight upper mold used for manufacturing the artificial marble or the like according to claim 1, a reinforced plastic is used which is made of carbon cloth or the like at the top and bottom and has a strong and small stretchable fiber sheet layer. Therefore, when the effective cross-section modulus is large and bending stress is generated in the lightweight upper die, the upper and lower reinforced plastics bear the strength, so that bending or warpage is small and a predetermined flatness can be maintained. . Since the light weight hard foamed plastic is provided between the reinforced plastics, the overall weight can be reduced.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 is a partial cross-sectional view of a lightweight upper mold used for manufacturing an artificial marble or the like according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a cross-sectional view showing the same usage state.

As shown in FIGS. 1 and 2, a lightweight upper mold 10 used for manufacturing an artificial marble or the like according to an embodiment of the present invention.
Is a rectangular upper mold body 11 having a thickness of about 30 to 50 mm, a protruding portion (referred to as a horn) 12 provided at a predetermined pitch on both side intermediate portions of the upper mold body 11, and the protruding portions 12 on both sides are connected. And the square pipes 13 made of steel respectively provided as described above. These will be described in detail below.

When manufacturing the lightweight upper mold 10 used for manufacturing the artificial marble or the like, a wooden mold (or a plastic mold or a metal mold) having the same shape as the predetermined lightweight upper mold 10 is used. Manufactured using. The bottom surface and the side surface of the upper mold body 11 and the bottom surface and the side surface of the protrusion 12 have 0.5 to 0.5 mm.
A gel coat layer 14 having a thickness of 1 mm is formed, and a reinforced plastic layer 15 having a thickness of about 1 mm in which a glass fiber sheet is impregnated with unsaturated polyethylene and a curing agent is formed therein. This reinforced plastic layer 15
The glass fiber sheet is preliminarily laid in a mold on which the gel coat layer 14 is formed, and a brush and a roller are used so that air is not mixed with the lower gel coat layer.

Through the above steps, the reinforced plastic layer 15
After curing, the carbon cloth is impregnated with unsaturated polyethylene and a curing agent to form a reinforced plastic layer 16 with a thickness of about 1 mm. In this case, after spreading the carbon cloth in advance, use a brush and a roller in the same manner. do it,
A reinforced plastic layer 16 is formed so that air bubbles do not remain inside, and a hard foam urethane plate 17, which is an example of hard foam plastic, is housed in the upper mold body 11 in a state where the filled resin is not cured. , And wooden plywood 18 is put in each of the protrusions 12.

Then, carbon cloth is spread on the surface of the rigid urethane foam plate 17 and saturated polyethylene and a curing agent are soaked in to form a reinforced plastic layer 19 in the same manner as described above. This time, the reinforced plastic layer is formed. 1
9 and the surface of the wooden plywood 18 are covered with a glass fiber sheet and saturated with unsaturated polyethylene and a curing agent to form a reinforced plastic layer 20. Next, the square pipe 13 is placed on the reinforced plastic layer 20, and the square pipe 13 is held and fixed by the band 21 made of reinforced plastic. In addition, as shown in FIG. 2, the square pipes 13a provided on both sides in the longitudinal direction of the upper mold body 11 are
Since no protrusion is provided on the lower part, the upper mold body 11
Is equal to or slightly shorter than the width of.

When the lightweight upper mold 10 used for manufacturing the artificial marble or the like is used, as shown in FIG. 3, a predetermined amount of compound 23 is added to the lower mold 22 engaged with the lightweight upper mold 10.
Then, the lightweight upper mold 10 is fitted, and the lower mold 22 and the protruding portion 12 are clamped and fixed to the lower mold 22 and the protruding portion 12 by using a simple vise.
By holding in this state, the internal compound 2
Since 3 is hardened, artificial marble is completed. In the above case, since the wooden plywood 18 is provided in the portion to be fastened with the simple vise, it can be fastened with a large force, and since the main content is the rigid urethane foam plate 17, the conventional plywood type is used. In comparison, the weight is 60 to 70%. Further, since the reinforced plastic layers 16 and 19 containing carbon cloth are formed on the upper and lower sides of the rigid urethane foam plate 17, the substantial strength is increased,
Little warpage. In the above examples, the reinforced plastic layer containing the glass fiber sheet was the outer side, and the reinforced plastic layer containing the carbon cloth was the inner side, but it is also possible to replace it, and the reinforced containing the glass fiber sheet is reinforced. The plastic layer may be omitted, and a reinforced plastic layer containing carbon cloth may be multilayered.

[0012]

As is apparent from the above description, the lightweight upper mold used for manufacturing the artificial marble and the like according to claim 1,
Hard foamed plastic is used inside and a reinforced plastic layer is formed on the top and bottom of it using a fiber sheet layer with strength and small elasticity made of carbon cloth etc., so it is sufficient for bending etc. It has strength and can reduce the weight compared to conventional products. Therefore, since it is easy to handle, workability is improved and occupational diseases such as low back pain are reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a lightweight upper mold used for manufacturing an artificial marble or the like according to an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a cross-sectional view showing the same usage state.

[Explanation of symbols]

 10 Lightweight upper mold used for manufacturing artificial marble etc. 11 Upper mold body 12 Projection part 13 Square pipe 13a Square pipe 14 Gel coat layer 15 Reinforced plastic layer 16 Reinforced plastic layer 17 Hard foam urethane plate 18 Wooden plywood 19 Reinforced plastic layer 20 Reinforced Plastic layer 21 Band 22 Lower mold 23 Compound

Claims (1)

[Scope of utility model registration request] 1. A relatively thick and lightweight hard foamed plastic is arranged in the middle part, and a reinforced plastic layer formed of a fiber sheet layer having strength and low elasticity formed of carbon cloth or the like is formed above and below the hard foamed plastic. Lightweight upper mold used for manufacturing artificial marble etc.