Resin Mould for Ceramic Slip Rotary Moulding (CSRM) System

A type of porous resin was proposed to replace the existing plaster mould for Ceramic Slip Rotary Moulding (CSRM) system. The proposed resin is often used in high pressure casting of ceramic sanitary ware and table ware. The effect of resin mould in terms of mechanical strength (flexural properties), porosity percentage and percentage of water absorption as well as moulding process were recorded and compared with previous studies of plaster mould. Five (5) samples of porous resin were prepared according to ASTM 790 for flexural test and ASTM D570 for water absorption test. To determine the porosity percentage, mercury porosimeter test was conducted. The result shows that higher the water plaster ratio resultant in higher porosity percentage and water absorption. The result showed that, the proposed porous resin has great potential in replacing plaster mould as mould material for CSRM system. The mould has a uniform open pore to enable the filtration process to take place within the mould and the slip and has a great mechanical strength. However, porous resin is still a semi-permanent mould with definite service life.

Product Performance Analysis of Fine Bone China Using Ceramic Slip Rotary Moulding Process

By combining the traditional slip casting technique and existing polymer rotary moulding concept a new process namely Ceramic Slip Rotary Moulding (CSRM) machine was established. The CSRM machine was developed to control parameters such as temperature (heating and cooling), time and speed. It is suitable for producing hollow ceramic products especially for ceramic materials such as fine bone china, which is a soft material used for tableware and art ware products due to its brightness and high strength. This research mainly focuses on the preparation of five different particle sizes of fine bone china measurements; 106 μm, 125 μm, 202 μm, 250 μm, and 300 μm respectively by using the CSRM machine. Different particle sizes of the fine bone china materials were tested to check the accurate and suitable wall thickness by controlling the temperature, speed, time and also the weight of the slip to get the best quality of fine bone china products. The parameters obtained will be the guidelines for the overall test to produce the best hollow fine bone china products.

Integrated Process of Ceramic Slip Using Rotating Technique

Hollow shape product from ceramic material is produced generally by slip casting technique. This conventional technique is widely used in ceramic industries. Ceramic slip compound by rotating technique namely slip rotary moulding process is studied for producing the hollow shape green ceramic product. From experimental studies this advanced technique has exemplified high potential in producing green hollow shape ceramic product for mass production. Laboratory test result shows that the rotating technique is able to produce hollow shape green ceramic product with desired thickness and sufficient green strength (1 MPa) able to hold during de-moulding process.

FORMATION OF HOLLOW SHAPE PORCELAIN BY USING A NEW INTEGRATED SLIP ROTARY MOULDING TECHNIQUE

Hollow ceramic product is fabricated generally using slip casting technique. The conventional processes produce slip and mould waste which require for disposal schedule. A rotary moulding technique is a feasible process for producing hollow shape ceramic product and eliminates the waste. This paper focuses formulation of the slip and process parameters of the rotary moulding for hollow ceramic product fabrication. The formulated ceramic slip is poured inside the mould rotated at 2-axis system inside a controlled chamber with specific temperature, speed and time for producing green body hollow ceramic product. This process uses minimum amount of ceramic slip and long lasting mould material which will reduce ceramic waste to environment and simplify the manufacturing process for mass production. Using small amount of polymer based dispersant and coagulant agents, experimental analysis resulted the green hollow porcelain product which was successfully removed during de-moulding process without any breaks. The hollow product produces homogeneous forms of ceramic structure after firing procedure and 1.9 MPa green strength with addition of small amount of binder.

Design of a Ceramic Slip for Electrical Porcelain Insulators, Using Clay Dispersed in a Ball Mill

An electrical insulator is a piece or structure of an insulating material, which aims to rigidly or flexibly support electrical conductors or equipments, insulating them of the ground [1]. The insulators have distinct styles or types, offering a wide choice of components for overhead distribution design. The first and oldest series is the standard line post insulator for upright mounting on crossarms or structures [2]. An outline of the design can be seen in the Figure 1. These components have an integral head manufactured in porcelain for tie top attachment, and a base cemented on the lower end, for stud mounting to a flat surface.