Computer and hand carved stencil silver edition.
Three processes each have advantages, seihan technology currently in use are:Hand carved stencil. Complement each other. Then lose method of casting pouringsilver version; computer carving stencil is different from hand carved wax by computerwith the software of 3D spray wax machine combination, hand carved stencil usingparaffin carving out
Design drawings on the other. Make investment molding, lost wax casting methodusing pouring silver version; and hand-made silver edition, is the master plate directlyHandmade design model. Because the hand carved stencil seihan speed, wax carvingprocess modification easy, tool wear is relatively small and widely
Extensive use.
2 lost wax casting important means in the production of stainless steel jewelry. Lost wax casting or mold.
1 pressing rubber mold pressing rubber mould note and process: the surface does not direct hand contact with the student film. 1 die frame and the film must be clean.Priority should be given to the use of silver edition,
2 guarantee between the original and the rubber will not adhesion. Silver platedcopper should first. They basically accord with a function relation.
3 to determine the proper curing temperature and time. With the film thickness, the length and width of the original complex degree. Usually the die temperature is 150degree left glaze winter if rubber mold thickness in the 3 layer (about 10mm generalcuring time is 2025 minutes, if the 4 layer (about 13mm curing time for
3035 minutes. By analogy. At the same time complex degree of curing temperature and the original also has a relationship, such as the original complex, small, should reduce the curing temperature, curing time extended. Filled with small particles.
4 die to ensure there is no gap between the original and the film. The plug, winding, fillthe first edition of the gap, and a concave inlaid stone fill. With a sharp material (such as tweezers). Plastic molding good overall requirements not deformation, smooth, notskew the waterline.
The 5 preceding preheating. After the vulcanization time to quickly remove the rubber mold. The best natural cooling to make it not hot, you can manipulate the serve hot with the sharp knife to open operation mode.
Plastic mold and injection wax 2
1 plastic mold plastic mold: tweezers, high technical requirements. Because the plasticmold has a direct impact on the quality of wax and metal blank. Plastic mold tool is simple operation knife. Scissors, pliers. Rubber mold four positioning method is usually used, i.e.. Mold open
There are four feet are fixed, the part between the legs are straight line cutting andrubber mold good by cutting curve should pay attention to check, not plastic mould with broken flowers, any defects such as obvious defects, such as adhesion, which may caused by the defects of wax, so on this
Some defects should be repaired, such as incision without cutting position, weldingwax welding broken flowers, missing angle place etc..
2 note wax: pressure and film pressing factors such as grasp. Rubber mold after opening the can wax injection control wax injection operation should pay attention to the temperature of the paraffin wax. Usually wax injection machine in wax temperature should be maintained at between 70-75 degrees, heater wax injection machine and a temperature sensor can make the wax liquid reaches and
To maintain a certain temperature. This temperature can ensure the activity of wax. Ifthe temperature is too low, not easy to fill the liquid wax wax, wax pattern caused byincomplete; otherwise the wax liquid temperature is too high, will cause the liquid waxwax gap from overflow or from wax injection mouth overflow, easy to form a flash,bubble
Or burn your fingers. Wax injection machine cylinder pressure is provided by externalpump waxy plane more, simple configuration with 0.5-0.8kg/cm pressure. Waxy thin walls, inlaid stone and narrow gap with 1.0-2.0kg/cm pumping wax time: large wax like4 seconds, fine pieces of wax like 2 seconds
The clock. First you should open mold, injection wax wax injection before. Checkrubber mold integrity and clean. If the rubber mold is used, it should to glue moldespecially the beginning is smaller than the position of the jet complex natural wax(can also sprinkle a little talcum powder) in order to remove the wax. Dewaxing
Agent and talcum powder can not be used at the same time, talcum powder can not be used too much, lest cause wax support surface roughness. Take a powder can play 3-6 wax piece. And then to preheat the wax injection machine, open the pump,adjust the pressure and temperature. Start the vacuum pump, injection wax. Checkwhether the temperature in wax
Between 70-75 degrees, check pressure and plastic mold wax complicated degreeadjusted according to wax injection time, and then the rubber mold clamping plate in the hands, pay attention to the finger distribution should make the rubber mold is evenly pressed; the rubber mold gate alignment note Hawfinch parallelimplementation, top up hands still note Grosbeak, use
Feet tread lightly and wax injection switch and then release, when the indicator lightwax injection machine from yellow to red, and then green, said wax injection process has been completed, the rubber mold is removed from the Hawfinch side. According tothe sequence of wax injection on rubber mold, when continuous injection of 6-7 plasticdie, to open the first
A jelly mould (if the rubber mold bottom, should first will die bottom pull) out wax, etc..Modulus is to pay attention to tactics, avoid wax pieces of broken and deformation,wax removal after careful examination, if the lack of edge, broken jaw, deformation,severe flash or more bubbles and other problems, so
The wax pattern belongs to waste. If it is minor defects, it should be wax finishing. The melting temperature is 60 ℃ Zuo Youdong
The material: paraffin wax injection model of blue. Wax injection at 65 ℃. Wind pressure and vacuum type two. Vacuum can first will glue film vacuum.
The wax injection tools: wax injection machine. To the film wax injection; wind pressuredirectly to the film wax injection.
3 dressing wax and wax tree wax injection after removing the wax models exist some problems. For flash, trim the wax models: general. Multiple edges, clip, head not clearor edge defects can use operation blade repair light; for trachoma, broken bones can be used for repair welding of wax
Welding; keyhole impassability can penetrate the welding needle for; for the wax models of deformation can be corrected in 4050 ℃ hot water in the. If the wrong handinch, to repair the wax directly to the finger ring. Used for welding wax device along the circumferential direction are hierarchically welding on a stick, kinds of ash: waxprepared by
According to a certain order. The ultimate have a shape similar to the tree the tree.While the concave hole inserted into the chassis of the heat in the first step; for ash isthe wax liquid wax stick head dipped in melted. Layer by layer will wax welded in waxstick. General from the stick head start, the second step. The upward
The method can prevent the wax dripping wax melting in the welding is good, to avoid unnecessary rework. Wax and wax rod 45 ° for casting, the basic requirements for ashis wax to orderly arrangement. Not only can not contact, but also as much as possiblewill wax welding in the ash
In order to meet the need of mass production. 3 irrigation gypsum and baking gypsumfor the first time after vacuum pumping, and the gypsum slurry along the inner wall ofsteel bell slowly into the gypsum slurry, avoid directly into ash. Not until the gypsum slurry wax tree is about 1cm, with good natural gypsum: even the chassis set
Stainless steel tube; the corresponding weight of gypsum powder and water and stirinto the gypsum slurry. Second vacuum. And then the natural place for 1224 hours to ensure that the gypsum solidification. Main function is to dewaxing, baking gypsum:baking plaster mold is an important step to guarantee the normal casting. Dry
And casting insulation. Dewaxing temperature is 0250 ℃, general. The holding time is1.5--2 hours; drying temperature is 250600 ℃, holding time is 23 hours; intermediatetemperature of 600--900 ℃, holding time is 23 hours; the casting temperature is 9001000 ℃, holding time of 24 hours
. The plaster mold gate down into the furnace, baking process generally is the electric oven to start temperature. In order to facilitate the wax liquid outflow evaporation. The initial constant temperature constant temperature after an hour, at 12 hour intervalsgradually rise gentle temperature. Pay attention to heating (or cooling) speed should be maintained at
100200 ℃ / hour, heating up too fast or easy to form crack of the plaster mold,serious can cause plaster mold is damaged or scrapped. Heating up too slow andeasily cause lost wax or plaster mold drying is not complete, affects the quality of the products. Plaster mold baking time depends on the size of the tree and steel complex
Complexity, can be adjusted according to the specific situation.
4 molten steel and casting including smelting process, stainless steel&