JPS59150717A - Rotary molding machine for catch-basin - Google Patents

Abstract

PURPOSE:To improve the dimensional accuracy of the inserted socket of a catch- basin by a method wherein it is composed of a rotative mold body and a cover body that is used as the subsidiary mold for directly molding the fitting socket of the catch-basin. CONSTITUTION:A cover body 8 is removed, powder of synthetic resin such as polyethylene, polypropylene, etc. is put in the cavity 6 of a mold body 2, and the cover body 8 is set to the original closed state. When the mold body 2 is heated and rotated in the direction of the arrow X, the powder is stuck in layers to the entire surface of the inner wall of the cover body 8 and sintered. Then, when the mold body 2 and the cover body 8 are cooled, a catch-basin 3 is molded, cut at the position shown by an imaginary line Y1 and the excessive part is cut off to make an opening portion. In the catch-basin 3 obtained the fitting socket 12 is molded by the direct subsidary mold 11 with improve dimensional accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a drainage system (rainwater system) having a fitting socket on the top surface for fitting a lid or an adjuster.

The present invention relates to a rotary molding device used for molding products (such as storage containers, etc.).

This type of rotary molding equipment currently in use uses a mold 2A having a cavity 6A that simply matches the external shape of the rainwater basin 3A to be molded and a lid body 8A, as shown in Figures 10 and 11. The rainwater basin 3A is molded, and the excess portion is cut along cutting line Y to form an opening. Since the inner wall surface 13A of the upper fitting socket 12A is not molded in close contact with the mold surface but is instead molded indirectly (indirect molding), the dimensional accuracy of the fitting socket 12A is poor. Not only did the lid and adjuster not fit snugly and tend to come off easily, but there were also cases where the lid and adjuster did not sit properly.

Therefore, the present invention solves the above-mentioned drawbacks at once by providing an auxiliary mold for directly molding the fitting socket of the drainage basin on the lid of the mold body (forming it on a surface that is in close contact with the mold). The purpose of this invention is to provide a rotary molding apparatus that provides the following advantages.

Hereinafter, one embodiment of the present invention will be described in detail based on drawings of a rainwater drain.

Box rolling and forming apparatus IK of the first embodiment shown in FIGS. 1 and 2
, 113, which is a Zti mold body, has a cavity 6 composed of a side wall and a bottom wall for molding the side wall outer surface 4 and bottom outer surface 5 of the rainwater basin 3 to be molded, and has an axis 7.
It is designed to rotate around .

Reference numeral 8 denotes a lid, which is provided to close the opening 9 of the mold body 2 and is connected with bolts 10.

The mold body 2 includes a heating means (not shown) for sintering the synthetic resin powder placed in the cavity 6 of the mold body 2 on the inner wall surface of the cavity 6, and a cooling means (not shown) for cooling and solidifying the synthetic resin powder on the inner wall surface of the cavity 6. (not shown) is provided.

111/'i auxiliary type, which has wall surfaces 15 and 16 forming the vertical wall surface 13 and horizontal wall surface 14 of the fitting socket 12 on the upper surface of the rainwater basin 3 to be molded, and the center of the lid body 8 is directed downward It bulges out and forms.

This auxiliary type may be integrated with the lid 8, but if it is manufactured separately and connected to the lid 8, it can be selected according to the desired fitting socket.

When forming the rainwater basin 3 using the rotary molding device configured as described above, first remove the lid 8 and fill the cavity 6 of the mold body 2 with powder of a synthetic resin such as polyethylene or polypropylene. If the lid body 8 is set to the original closed state and the mold body 2 is heated and rotated in the direction of the arrow X, the powder will adhere to the entire inner wall surface of the mold 2 and the lid body 8 in a layer. Sinter.

After that, by cooling the mold body 2 and the lid body 8, the rainwater basin 3 shown in Fig. 3 is molded, and the opening can be made by cutting it at the position shown in the virtual line to remove the tea ceremony area. .

The three rainwater basins and fitting sockets 12 thus obtained are directly molded using the auxiliary mold 11, resulting in high dimensional accuracy.
First of all, not only the lid but also the adjuster 17 fit snugly as shown in Figure 5, making it comfortable to sit on.

In the above embodiment, a rotary molding device for molding a rainwater tank with a stepped fitting socket 12 has been described. However, by appropriately changing the auxiliary mold 11, the rotary molding device shown in FIG. By using 100.101, it is possible to mold a rainwater filter 30.31 having a groove-shaped fitting socket 18 as shown in FIGS. 7 and 9.

That is, in the embodiment shown in FIGS. 6 and 7, the fitting socket 18 is formed in a concave groove shape, and the difference from the previous embodiment is that the fitting socket 18 is formed in an auxiliary mold provided on the lid body 8. Places 111 for forming the concave groove inner wall portion 181 of the mouth are provided around the entire circumference.

Then, as shown in FIG. 7, a rainwater basin with a groove-shaped fitting socket and an opening was obtained by cutting off the excess portion at the position shown by the imaginary line Y2.

Further, since the embodiments shown in FIGS. 8 and 9 are the same as the embodiments described above, their explanations will be omitted.

First of all, the rainwater obtained by this device can also support the inner circumferential surface of the adjuster 17 at the fitting socket 18, so the inward deformation of the adjuster is completely prevented even if a large load is applied to the adjuster due to the soil support during backfilling. This ensures that the fitted state is maintained.

Further, even if a large vertical load is applied to the adjuster, there is no fear that the adjuster will deform inward and escape, and has excellent load resistance.゛・Although the embodiment describes a rainwater basin, it goes without saying that it can be applied to any drainage basin such as a storage basin.

As shown in the embodiments above, the rotary molding device for drainage according to the present invention has an auxiliary mold formed on the lid body for molding the inner wall surface of the fitting socket of the 441 water basin to be molded. Since the inner wall surface of the fitting socket of the drainage basin can be directly molded using an auxiliary mold, unlike conventional equipment that molds indirectly, it is possible to mold a drainage basin with extremely high dimensional accuracy of the fitting socket. .

Therefore, the drainage obtained by the rotary molding apparatus of the present invention must first fit the lid or adjuster tightly into the fitting receptacle.
Moreover, it is comfortable to sit on.

[Brief explanation of drawings]

1 to 5 show a first embodiment of the present invention, FIG. 1 is a longitudinal cross-sectional view of a rotary molding device, FIG. 2 is an exploded perspective view thereof,
Figure 3 is a perspective view of a rainwater basin obtained by the device, Figure 4 is a sectional view taken along line A-A in Figure 3, Figure 5 is a sectional view of the rainwater basin with the adjuster fitted, and Figure 6 is a sectional view of the rainwater basin with the adjuster fitted. A longitudinal sectional view showing the device of the second embodiment, FIG. 7 is a partial sectional view of a rainwater basin obtained by the device of FIG. 6, and FIG. 8 is a longitudinal sectional view showing the device of the third embodiment. Figure 9 is a partial cross-sectional view of a rainwater basin obtained by the installation fTt shown in Figure 8, Figure 10 is a cross-sectional view showing a conventional device, and Figure 11 is a partial cross-sectional view of a rainwater basin obtained by the apparatus shown in Figure 10. It is. 2... Mold body, 3... Rainwater first, 4... Side wall outer surface, 5... Bottom outer surface, 6... Cavity, 8...
Lid body, 11... Auxiliary type, 12... Fitting socket, 13...
・Vertical wall surface,】4...Horizontal wall surface. Patent applicant Takiron Co., Ltd. Figure 1 Figure 2 1+; Figure 5

Claims (1)

[Claims] (1) A mold body that has a cavity composed of a side wall and a bottom wall for molding the side wall outer surface and bottom outer surface of the one-piece water basin to be molded, and that can be rotated as appropriate, and an opening in the mold body. In a rotary molding machine configured to sinter and mold the synthetic resin powder put into the cavity of the mold body on the inner wall surface of the cavity, the fitting of the drainage basin to be molded. A rotary molding device for drainage first, characterized by having an auxiliary mold formed on the lid body for directly molding the socket.