JPS5955729A - Manufacture of molded matter made of thermosetting resin - Google Patents

Abstract

PURPOSE:To enable to manufacture effectively a molded matter made of thermally curable resin whose dimensional accuracy is favourable, by a method wherein a molded matter is separated from a mold before it is cured completely and is cured by holding it in a desired shape by securing it on a support frame with a vise. CONSTITUTION:A molded matter 1 made of unsaturated polyester resin separated from a mold at the time when curing is advanced up to 50-60% is placed on a support frame 2 under an upright state, a turning frame 21 is turned toward the molded matter 1 and the molded matter is connected with a stationary frame 22 through a hand vise 33 under a state wherein a side edge of the molded matter 1 is secured to the stationary frame 22 through a hand vise 31. Then a recession part, the inside of the molded matter 1 is secured by the hand vise 32 and a protruded part, and the outside of the same is secured by a side lever 4. In addition to the above, the fringe of the lower part of the molded matter 1 is secured by a hand vise 35 and the molded matter 1 is cured by heating at 70 deg.C for 3hr in a heating room. A deformation and a distortion at the time of molding, therefore, are corrected in the course of curing and the molded matter whose dimensional accuracy is favourable can be obtained.

Description

[Detailed description of the invention] The original F! Part 4 relates to a method suitable for efficiently manufacturing thermosetting resin molded articles with good dimensional accuracy.

Conventionally, molded products have been manufactured using thermosetting resin molding materials using the no-no-dry-up method, resin injection method, etc., but in order to increase molding efficiency, RI molded products are manufactured faster than the molding die. It is desirable to release the mold.

If left untreated, products with good dimensional accuracy could not be obtained due to molding distortion and deformation during curing.

An object of the present invention is to eliminate the drawbacks such as mold problems and to provide an efficient manufacturing method for thermosetting resin molded products.

Next, an example of the manufacturing method of the present invention will be explained based on the drawings.

When the convex part and the concave part are closed, a mold cavity that fits the desired shape of the molded product is formed. A saturated polyester resin molded product 1 is placed upright on a support frame 2,
The rotating frame 21, which is pivotally attached to the rotating frame 21, is rotated toward the molded product 1, and the hand vises 31, which are attached to the left and right vertical rods of the rotating frame 21 in three pieces, The hand vise 33 is used to engage the fixed frame 22 with the side edges thereof fixed to the fixed frame 22.

Next, the inner concave surface of the curved upper end of the molded product l is fixed by two hand vises 32 attached to the left and right sides of the horizontal rod of the rotating frame 21, and the hand vices 32 attached to the horizontal rod of the fixed frame 22 are fixed. The outer convex surface portion of the curved surface portion is fixed by a single wooden horizontal rod 5 fixed to the tip of the hand vise 34. Furthermore, the lower peripheral edge of the molded product 1 is fixed by two hand vises 35 attached to the bottom plate 23 of the fixing frame 2.

The molded product 1 fixed to the support frame 2 as described above is heated in a heating chamber at 70° C. for about 3 hours to fully harden it.

Thermosetting resins include unsaturated polyester resins, epoxy resins, diallyl phthalate S resins, and other thermosetting resins, if necessary, with curing agents and accelerators, and in cases where some parts have thick parts. A core material such as Frethane resin foam or acrylic resin foam may also be embedded inside.

As the fixing metal fittings, in addition to a hand vise, a chocolate vise, bolts, and nuts may be used.

According to the present invention, the thermosetting resin molded product released from the mold is fixed to the support frame using the fixing metal fittings, and is cured while being held in the desired shape, so that when curing has progressed by 50 to 60%, Even if the molded product is released from the mold, the deformation and distortion during molding will be corrected during curing, making it possible to obtain a thermosetting resin molded product with good dimensional accuracy, increasing molding efficiency. At the same time, boss forming can also be performed after release from the mold and before fixing with the support frame.

Further, when a hand vise is used with the fixing fittings as in the above embodiment, there is an advantage that the molded article can be easily and reliably fixed to the support frame in a short time.

[Brief explanation of drawings]

FIG. 1 is a side view showing an example of the method of the present invention, and FIG. 2 is a front view of the same. 1: Unsaturated polyester resin molded product 2: Support frame 31, 32, 33.34.35:
Hand vise Fig. 1 Fig. 2 Wj jb l t

Claims (1)

[Claims] L: Before the thermosetting resin molded product is completely cured, it is released from the mold, and the molded product is fixed to a support frame using a fixing fitting,
A method for producing a thermosetting resin molded article, which comprises curing it while holding it in a desired shape. 2 Claim 1 in which the fixing metal fitting is a hand vise
A method for producing a thermosetting resin molded article as described in 2.