Plastic article or earthenware shaping or treating: apparatus – Shaping surface including means to release or remove product... – By movable mold sections
Patent
1995-07-19
1998-05-26
Wu, David W.
Plastic article or earthenware shaping or treating: apparatus
Shaping surface including means to release or remove product...
By movable mold sections
425451, 425453, 164430, B28B 502
Patent
active
057561311
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a moulding device of building materials, such as concrete beams or door frames, and aluminum blocks, using conveyor belt moulding frames. Particularly, the invention relates to a device capable of continuously moulding the materials as well as automatically removing them from the mould frames.
Numerous devices and methods for continuous moulding of building materials, such as wall plates and ceiling plates made of plaster or concrete have been proposed up to now.
Japanese Laid-Open (Unexamined) Patent Publication (sho) 53-110621 discloses a conveyor moulding system in which moulding material is poured through the conveyor inlet into the moulds of the conveyor, and hardened during progress, with the moulded product being removed from the moulds at the conveyor outlet where the drive roller rotates in a curved path, as illustrated in FIG. 1A. According to this reference, side conveyors 12 are installed at both sides of a moving conveyor 11 and moved at the same running speed as that of the moving conveyor 11. An L-shaped supply bath 14 having a flat portion 13 between the side conveyors 12 is installed above the moving conveyor 11. A plaster slurry having a viscosity of 10 to 100 poise from a line 15 is injected continuously into a moulding part of predetermined length consisting of the flat portion 13, the moving conveyor 11 and the side conveyors 12. The slurry in the supply bath 14 is maintained at almost a constant level, and the slurry is poured through an opening, which is provided in the flat portion 13 and has dimensions conforming to the products' dimensions, and is spread and hardened on the conveyor 11. After the slurry is hardened, the hardened products are removed from the moulds, cut, and then dried.
The above system can be used for the production of thin plates such as wall plates, ceiling plates, and so on. However, it cannot be used for the production of large door frames which have complex sectional structures and diverse dimensions. In addition, according to the above system, since the moulding frame is constructed by holding side conveyors 12 to both sides of the horizontal conveyor 11 tightly, the intersections between conveyors become square. Consequently, the above system can produce products having square corners as sharp as a blade, and also having seam portions; however it cannot be used to produce products such as door frames which require round edges.
In addition, Japanese Laid-Open (Unexamined) Patent Publication (sho) 49-27509 discloses a continuous moulding device and a method for manufacturing plates using a belt conveyor system, as illustrated in FIG. 1B. According to this reference, an integrated moulding frame 18 is installed on a conveyor 17 by inserting it between edges of the conveyor. The conveyor 17 is driven by the driving force of a rotating drum 16 and the moulding frame 18 can be bent repeatedly. The frame 18 is separated into several partitions by separating walls 18a, 18b and made of soft, resilient material. Plaster material 19 is filled in each partition of the moulding frame 18 and hardened during the conveyors' 17 movement. Then, each product 19a is automatically removed from the moulding frame 18 as the rotating drum 16 rotates.
In the above method, as the mating surfaces between the bottom of the hardened product 19a and the conveyor 17 are spaced from each other by the rotation of the rotating drum 16, the product is removed. However, in case of the removal of the hardened product from the separating walls 18a, 18b which separates the moulding frame into several partitions, since the detachment is forced, with the surfaces sliding on each other by the rotation of the rotating drum 16, use of the above method is impossible if the height of the separating walls 18a, 18b must be high. Specifically, since the upper surfaces of high separating walls will rotate along a larger arc when being bent by rotation, the separating walls should be adequately extendable along the arc in order to rotate; if not
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