Jewelry Casting more equipment involved , mainly by wax injection equipment, open powder equipment and casting machines.
      First, wax injection equipment
      Wax injection equipment including vacuum wax injection machine and pneumatic wax injection machine , pump pressure are used to make rubber mold cavity filling liquid wax . Wax investment casting mold making process is an important step , wax quality jewelry products to have an important impact . Early atmosphere commonly used is a simple

Type wax injection machine, quality assurance wax mold is relatively difficult , especially fine wax difficult to shape . After the 1980s, there has been a vacuum wax injection machine , wax injection required prior to taking the time to rubber mold, wax mold is due bets wax in a vacuum state , so that the filling performance has been optimized , so you can note the ratio

Thin thin wax , liquid wax to improve the filling ability . 90 years after the development of a higher degree of automation of vacuum wax injection machine, such as Japan yasui company’s digital vacuum wax injection system , wax injection system using secondary shrinkage minimize wax , wax injection parameters can be either

Italian combination . Clamping rubber mold into the robot , enter the program number, press the " Start" button , you can automate the entire process. The device temperature control accurate, perfect wax injection effect.
      Previous wax injection molds for the rubber mold , a certain thickness requirements . In recent years, a part of the structure of metal film, the production of wax is very thin, almost transparent , and good stability of its weight, size , and a simple structure suitable for bulk items .
      Second, open powder equipment
      Simple and easy to use universal mixer slurry gases involved , the whole process should be open powder after many procedures , more cumbersome. After 90 years there has been a vacuum automatic mixing powder machine , which combines the agitator and vacuum sealing device in one, can be done from the casting powder to stir in a vacuum

Filling the forming process to effectively reduce the bubbles to make the product better finish . Vacuum mixing the powder with water and generally have a set of quantitative mixing time and speed and other functions, improve the degree of open powder automation, simple operation , saving time .
      Third, roaster
      Gypsum roaster jewelry industry with the most resistance furnace , usually three sides heating furnace temperature distribution is uneven, it is not easy to adjust when roasting furnace atmosphere . In order to achieve a uniform temperature distribution in the furnace , the elimination of wax residues and automation control objectives, in recent years

Developed a number of advanced roaster . For example, Italy, Schultheiss company developed a new type of furnace between the heating element and the plaster sets the heat-resistant steel hood , roof mounted in a fan forced air flow through the furnace heating elements and returns from the bottom , forcing the furnace air flow

Improved thermal insulation performance of the furnace shell . Germany developed a more advanced roaster , using rotary hearth way to make plaster evenly heated , relatively smooth gypsum , fine , specially designed to meet the advanced requirements like wax casting process . This box is surrounded by heating furnace , which has a double firebrick

Separators , heat uniformity and stability , good insulation properties , after two full combustion exhaust gas is pollution-free , no adverse effects on the environment . Currently , many countries are producing this roaster .
      Fourth, the casting machine
      Jewelry casting machine is a very important investment casting equipment to ensure product quality is an important condition . Since the products are relatively fine jewelry , liquid metal in the casting process will soon lose mobility solidified , so conventional gravity casting difficult to guarantee its shape,

Must introduce some external force to promote its rapid filling of the cavity in order to obtain a complete shape , outline clear the workpiece. According to the form of the use of force , used mainly in jewelry casting machine casting machine centrifugal and static categories.
      ( 1 ) Centrifugal casting machine : the use of high speed centrifugal force generated by rotation of the molten metal introduced into the cavity , filling speed, is conducive to forming a small complex parts for Au, Ag alloy casting , etc. ; for Pt , because it is in liquid very short time , using centrifugal casting

More suitable. Currently, some small plants still using a simple mechanical drive centrifuge , it does not come with induction heating device , the use of oxygen ( acetylene ) molten metal , or the use of molten gold metal melting machine , and then the molten metal is poured into a crucible centrifuged casting,

Metallurgical quality is not guaranteed. With modern centrifugal casting machine a significant improvement in this area , set induction heating and centrifugal casting in one, suitable for casting Au, Ag, Cu and other alloys.
      Compared with static casting, centrifugal casting the molten metal casting having severe turbulence , prone pores, liquid metal erosion of the pocket wall intense easily cause cracking or peeling of the mold , the maximum amount of metal is relatively small in the centrifugal casting and other shortcomings . To solve these problems , modern centrifugal casting

Improved machine drive technology and programming capability, the central axis of the mold and the angle of the pivot arm is designed as a function of the rotational speed , the change from 90 degrees to 0 degrees , considering the inertial force of the centrifugal force and tangential outflow of molten metal crucible , flowing into the role of the mold , to help balance the liquid metal , prevention

First, the molten metal flows into the runner along a wall of the reverse rotation direction ; mold bottom in the additional suction means , to facilitate the smooth discharge of the gas within the cavity , preferably improve the filling capacity ; also equipped with a temperature measuring device , can greatly reduce human error in judgment .
      ( 2 ) static casting machine : the use of vacuum casting , pressing , etc., to promote liquid metal filling the cavity . Compared with centrifugal casting , filling process static casting machine is relatively flat , small scour the liquid metal on the type of wall ; once more the maximum amount of metal casting . Therefore ,

Static casting machine in jewelry making industry has been more widely used . There are a variety of static casting machine , which was undoubtedly the most simple cable suction machine . The main components of the vacuum system of the machine , without heating melting apparatus , so the torch or furnace to be used in conjunction with the simple operation

Single high efficiency. Because it is cast in the atmosphere , there is a problem of secondary oxidation inhale liquid metal , the entire casting process is controlled by the operator , and therefore , the quality of many man-made factors .