JPH03219914A - Slip casting device - Google Patents

Abstract

PURPOSE:To obtain high productivity at low cost of equipment by a method wherein a plurality of casting molds are separable laminated to one another so as to partition a cavity between molds adjacent to each other and, at the same time, connectors, each of which separable connects adjacent molds with each other, are provided. CONSTITUTION:In a casting station B, cavities 51 and 52 are partitioned by clamping the respective molds 41, 42, 43 and 44 of slip casting mold 40. Next, the slip casting mold 40 is tilted so as to fill slip in the cavities 51 and 52 and to pressurise the filled slip, resulting in pushing out the water content in the slip in a water conveying passage in order to form formed bodies. In succession, the slip casting mold is brought back to its initial vertical position and, after that, compressed air is poured in the water conveying passage and simultaneously a mold clamping cylinder 37 is retracted. As a result, the first formed body is released from the first lower mold 42 and, in succession, the first lower mold 42 and the second upper mold 43 are lifted, resulting in releasing the second formed body from the second lower mold 44. After that, a truck is run toward a mold stripping station A.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a slurry casting apparatus for molding ceramics and the like.

(Prior art) The slurry casting method is often used in the manufacture of sanitary ware, etc., in which peptized slurry made by suspending raw material viscosity in water is poured into a mold to form the product. Various slurry casting apparatuses have been proposed in Japanese Patent Publication No. 3845/1983.

The slurry casting apparatus disclosed in Japanese Patent Publication No. 64-3645 mentioned above uses a mold consisting of two split molds that can be divided into upper and lower parts, with the upper split mold being fixed to a base and the lower split mold being fixed to a base. The mold is supported so that it can be moved up and down, and the mold is assembled and divided. This molding apparatus molds a molded article by pouring slurry into a cavity defined between the divided molds in a state where the divided molds are assembled, and also divides the divided molds to take out the molded article.

(Problems to be Solved by the Invention) However, in slurry casting molding, the molding is performed by depositing and growing on the cavity wall surface, and the molding takes a considerable amount of time. Since only one cavity is defined, only one molded body is molded in one operation, resulting in low productivity. In order to increase productivity, it is necessary to install a plurality of the above-mentioned slurry casting molding devices and perform molding simultaneously, which increases the equipment cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a slurry casting apparatus that can obtain high productivity with low equipment costs.

(Means for Solving the Problems) The present invention provides a slurry casting apparatus for injecting slurry into a cavity defined between separable molds and dewatering the slurry in the cavity to form a molded article. The gist of the mold is that a plurality of molds are layered in a divisible manner to define cavities between adjacent molds, and a connector is provided to connect the adjacent molds in a divisible manner.

(Function) According to the slurry casting apparatus according to the present invention, the mold is formed by laminating a plurality of molds in a separable manner, and a cavity is defined between each mold. Therefore, many molded bodies can be molded in parallel using these cavities, and high productivity can be obtained.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a slurry casting apparatus according to an embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a side view.

In the figure, reference numeral 11 denotes a pedestal installed on the factory floor F, and a demolding station A and a molding station B are set on the pedestal 11 on both left and right sides in the figure. The pedestal 11 includes three pairs of supports 12a, each of which is erected and spaced apart in the direction perpendicular to the plane of the drawing.

A pair of lower beams 13 are installed on the lower beams 12b and 12c, extending parallel to each other and separated from each other in the direction perpendicular to the plane of the drawing.
Two pairs of upper pillars 14a are located at the upper center and left end, respectively, and are spaced apart in the direction perpendicular to the plane of the first drawing.

14b is erected, and 1
It is constructed by installing a pair of ceiling beams 15. This pedestal 11 is provided with molded body holders 16 in two stages, upper and lower, corresponding to the demolding station A, and a frame 18 corresponding to the molding station B. The molded body holder 16 is the support 1
The molded body holder 16 extends on the floor F between 2a and 12b in the direction perpendicular to the paper surface of the first drawing, and on the molded body holder 16 are placed chestnuts 16a and 16b.

Further, on the pedestal 11, a pair of fixed rails 19a are installed on the left side of the lower beam 13 in parallel to each other and spaced apart in the direction perpendicular to the plane of the paper in FIG. The right end portion of the lower fixed rail 19a in the figure is cut diagonally so that it can be connected to a movable rail, which will be described later.

The frame 18 is supported by a pair of bearing blocks 21 on the right side of the lower beam 13 of the pedestal 11 so as to be rotatable around an axis perpendicular to the plane of the drawing. The frame body 18 is formed by joining upper and lower horizontal panels 22 and 23 with a pair of vertical panels 24, and has a substantially rectangular cylindrical shape with both left and right sides open in FIG. In this frame body 18, a second lower mold 44 of a slurry mold 40, which will be described later, is fixed to the upper surface of a lower horizontal panel 23, and a vertical panel 24
A tilting cylinder 27 is connected to the left side edge in FIG.
b is fixedly installed. The tilting cylinder 27 has an upper end of a cylinder body 27a connected to the right end of the ceiling beam 15, and a tip of a rod 27b protruding from the lower end of the cylinder body 27a swingably connected to the side edge of the vertical panel 24. There is. This tilting cylinder 27 is expanded and contracted by hydraulic pressure supplied from a hydraulic circuit (not shown), and tilts the frame 18.

The movable rail 19b is cut diagonally so that its left end in FIG. Continuation and disconnection with the movable rail 19b are performed.

Reference numeral 31 denotes a mold moving trolley that can run on the movable rail 19b and the fixed rail 19a.

The trolley 31 includes four wheels 31a that move on the respective rails 19a and 19b and a motor 31b with a reduction gear, and the motor 31b drives the wheels 31a to travel. This truck 31 has two pairs of guide bushes 3 spaced apart from each other on the left and right in the figure.
2 is fixedly installed, and a mold cylinder 37 is vertically supported between the guide bushes 32. A hollow cylindrical guide rod 33 is inserted concentrically into each of the guide bushes 32 so as to be slidable in the vertical direction. 39 is fixed to the plate. In the mold clamping cylinder 37, a cylinder body 37a has a lower end supported by the truck 31 and stands upward from the upper surface of the truck 31, and a rod 37b is connected to the cylinder body 3.
It hangs down extendably from the lower end of 7a and the tip is the slurry mold 4.
The attachment of the first upper die 41 of No. 0 is coupled to the plate 39 for use.

The slurry mold 40 has a second upper mold 43 on a second lower mold 44,
A first lower mold 42 and a first upper mold 41 are sequentially stacked, and a cavity 51 is provided between the first upper mold 41 and the first lower mold 42, and a second upper mold 43 is provided between the first upper mold 41 and the first lower mold 42. A cavity 52 is defined between the second lower mold 44 and the second lower mold 44 . First lower mold 4
2 and the second upper mold 43 are fixed back to back. These types 41, 42, 43, 44 are constructed by laminating a porous inner layer having water permeability and an outer layer made of non-water permeable concrete or the like, and arranging a water guide passage at the boundary between the inner and outer layers or in the inner layer. Cavities 51 and 52 are defined in the inner layer, and clay is deposited and grown on the surface of the inner layer to form a molded body. Further, projections 38a are provided at four places on the side of the first lower mold 42, and a hook member 38 (connecting tool) fixed to the fixing plate 39 of the first upper mold 41 is used to lower the first lower mold 42. The mold 42 and the second upper mold 43 are suspended.

Next, the operation of this embodiment will be explained.

This molding apparatus simultaneously molds two molded objects (for example, tank lids) using a slurry mold 40 at molding station B. In this molding station B, first, the mold clamping cylinder 37 is extended, and each mold 41 of the slurry mold 40,
42, 43, and 44 are clamped together to define cavities 51, 52.

Next, the slurry mold 40 is tilted by tilting the frame 8 with the tilting cylinder 27, and the slurry is filled into the cavities 51 and 52. After this, the cavities 51 and 52 are filled using a pump or a pressure intensifier (not shown). Pressurize the slurry inside to about 5 to 20 atmospheres. As a result, the water in the slurry is forced out into the water guide passage of the slurry mold 40, and the clay is deposited and grows on the inner walls of the cavities 51 and 52, forming a molded body.

Subsequently, the tilting cylinder 27 is extended to return the frame 18 to its original vertical position, compressed air is injected into the water guide passages of the first lower mold 42 and the second lower mold 44 of the slurry mold 40, and ,
At the same time, the mold clamping cylinder 37 is firmly moved. As a result, the first molded body molded in the cavity 51 is first released from the first eye lower mold 42, and then the hook member 38 is released from the protrusion 38a.
The first lower mold 42 and the second upper mold 43 are lifted by the contact, and the second molded body formed in the cavity 52 is released from the second lower mold 44. Then, while the first and second molded bodies are held in the first upper mold 41 and the second upper mold 43, respectively, the cart 37 is moved toward the demolding station A on the left side in the figure. Run.

In demolding station A, receiving plates 16a and 16b are waiting on a molded body holder 16, and the mold clamping cylinder 37 is extended to bring the lower surface of the molded body into contact with the receiving plates 16a and 16b, or The extension stops just before contact. After that, compressed air is injected into the water guide passages of the first upper mold 41 and the second upper mold 43 of the slurry mold 40, and at the same time, the mold clamping cylinder 27
by firmly moving the first molded body and the second molded body to the first and second molded bodies.
The receiving plate 16a is separated from the upper molds 41 and 43.

Place the molded body on the tab. And these receiving plates 16
The molded bodies on a and 16b are transported to the next process.

On the other hand, after taking out the molded body, the carriage 31 moves to the right in FIG. 1 and travels to the molding station B, where the mold 40 is reassembled and repeated molding is performed.

In this embodiment, the slurry mold is moved to the demolding station, but the slurry mold may simply be moved in the vertical direction at the molding station, and the molded body holder may be moved to the molding station for demolding. Further, although the first lower mold and the second upper mold are made separately and connected back to back, they may be integrally formed.

(Effects of the Invention) As described above, according to the slurry casting apparatus according to the present invention, a plurality of molded bodies can be simultaneously molded with one molding apparatus, so that high productivity can be obtained. Furthermore, the manufacturing cost of the molding device is also reduced.

[Brief explanation of drawings]

1 and 2 show a slurry casting apparatus according to an embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a side view. 11... Frame 40... Slippery mold 41.
...First upper mold 42...First lower mold 43...
Second upper mold 44...Second lower mold 37...Mold clamping cylinder 51.52...Cavity

Claims (1)

[Claims] In a slurry casting molding device that injects slurry into a cavity defined in a divisible mold and dehydrates the slurry in the cavity to mold a molded article, the mold has a plurality of molds stacked in a divisible manner. 1. A slurry casting molding apparatus, characterized in that a cavity is defined between adjacent molds, and a connecting tool is provided to connect the adjacent molds in a separable manner.