1 thought on “What materials are generally used for making gold and silver casting molds?”
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Learn casting technology, go to casting order website gold and silver jewelry casting process
Step 1: concept and design - the designer draws a sketch by hand according to his own idea, and then uses drawing software to draw the sketch by computer with accurate size to complete the initial design drawing Step 2: craftsmen carve wax - Jewelry craftsmen carve wax plates by hand according to the design drawings, and then pour out the silver plates by wax loss casting. For batch production of wax plates, the silver plates need to be pressed into rubber molds. This is the most demanding process in jewelry * *. The silver plate must be clean and traceless, the structure of each part must be reasonable, and the position and size of inlaid gemstones must be accurate. Step 3: wax injection in the rubber mold - wax injection is carried out after the rubber mold is opened. The wax in the wax injection machine should be kept between 70-75 degrees. Inject the wax liquid into the plastic film, take out the wax mold after cooling, and repeat in sequence to obtain multiple wax molds Step 4: select matching stones - select matching stones with appropriate size, shape and color according to the silver plate and wax pattern Step 5: complete the wax pattern - prepare all the wax plates required for this batch production
Step 6: planting wax trees - weld each wax ring to a wax stick by hand, and finally get a wax tree with a shape similar to a big tree, ready for casting Step 7: weigh the wax tree - weigh the rubber chassis before planting the wax tree, and then weigh it again after planting the wax tree. The weight of the wax tree can be obtained by subtracting the two weighing results. The weight of the wax tree can be converted according to the density ratio of gold or silver to obtain the metal content for casting
Step 8: pour gypsum - put the planted wax tree together with the chassis on the stainless steel cylinder, and slowly inject the gypsum slurry with the corresponding weight along the inner wall of the steel cylinder. After passing through the wax tree, it will be naturally prevented for 6-12 hours after vacuuming to solidify the gypsum Step 9: bake gypsum - bake the gypsum mold, which is used for dewaxing, drying and casting insulation Step 10: take out the gypsum mold - take out the baked gypsum mold and prepare the metal solution to be cast at the same time. step 11: pour liquid gold - inject the molten gold from the nozzle Step 12: Casting by centrifugal process - casting by vacuum induction centrifugal casting machine step 13: blast cleaning and cleaning of gypsum mold - the cast gypsum mold is in a high temperature state. After being taken out of the casting machine, it is naturally placed for 10-30 minutes, and then put into cold water for blast cleaning. After the gypsum is cracked due to shrinkage, take out the golden tree, brush off the large gypsum with a steel brush, immerse it in 30% hydrofluoric acid for 10 minutes, clamp it out, rinse it, and remove the remaining gypsum until the surface of the golden tree is clean step 14: cut the casting - cut the jewelry on the gold tree along the bottom of the nozzle and dry it step 15: roller polishing process - put stainless steel abrasive and active organic synthetic solution into the roller, and rub with rotation to make the surface smooth and bright step 16: calendering process - calendering is all done by hand, and a special calender knife is used to push back and forth on the jewelry surface. This process requires certain technology and techniques step 17: polishing process - polish the jewelry with a polishing machine until the surface is smooth and bright step 18: select diamonds - manually sort the diamonds, select the ones that match the color, cutting and size, and prepare for inlay step 19: set diamonds – set each diamond by hand step 20: quality control - carefully inspect the finished jewelry one by one to ensure the qualified quality.
Learn casting technology, go to casting order website
gold and silver jewelry casting process
Step 1: concept and design
-
the designer draws a sketch by hand according to his own idea, and then uses drawing software to draw the sketch by computer with accurate size to complete the initial design drawing
Step 2: craftsmen carve wax
-
Jewelry craftsmen carve wax plates by hand according to the design drawings, and then pour out the silver plates by wax loss casting. For batch production of wax plates, the silver plates need to be pressed into rubber molds. This is the most demanding process in jewelry * *. The silver plate must be clean and traceless, the structure of each part must be reasonable, and the position and size of inlaid gemstones must be accurate.
Step 3: wax injection in the rubber mold
-
wax injection is carried out after the rubber mold is opened. The wax in the wax injection machine should be kept between 70-75 degrees. Inject the wax liquid into the plastic film, take out the wax mold after cooling, and repeat in sequence to obtain multiple wax molds
Step 4: select matching stones
-
select matching stones with appropriate size, shape and color according to the silver plate and wax pattern
Step 5: complete the wax pattern
-
prepare all the wax plates required for this batch production
Step 6: planting wax trees
-
weld each wax ring to a wax stick by hand, and finally get a wax tree with a shape similar to a big tree, ready for casting
Step 7: weigh the wax tree
-
weigh the rubber chassis before planting the wax tree, and then weigh it again after planting the wax tree. The weight of the wax tree can be obtained by subtracting the two weighing results. The weight of the wax tree can be converted according to the density ratio of gold or silver to obtain the metal content for casting
Step 8: pour gypsum
-
put the planted wax tree together with the chassis on the stainless steel cylinder, and slowly inject the gypsum slurry with the corresponding weight along the inner wall of the steel cylinder. After passing through the wax tree, it will be naturally prevented for 6-12 hours after vacuuming to solidify the gypsum
Step 9: bake gypsum
-
bake the gypsum mold, which is used for dewaxing, drying and casting insulation
Step 10: take out the gypsum mold - take out the baked gypsum mold and prepare the metal solution to be cast at the same time.
step 11: pour liquid gold
-
inject the molten gold from the nozzle
Step 12: Casting by centrifugal process - casting by vacuum induction centrifugal casting machine
step 13: blast cleaning and cleaning of gypsum mold - the cast gypsum mold is in a high temperature state. After being taken out of the casting machine, it is naturally placed for 10-30 minutes, and then put into cold water for blast cleaning. After the gypsum is cracked due to shrinkage, take out the golden tree, brush off the large gypsum with a steel brush, immerse it in 30% hydrofluoric acid for 10 minutes, clamp it out, rinse it, and remove the remaining gypsum until the surface of the golden tree is clean
step 14: cut the casting - cut the jewelry on the gold tree along the bottom of the nozzle and dry it
step 15: roller polishing process - put stainless steel abrasive and active organic synthetic solution into the roller, and rub with rotation to make the surface smooth and bright
step 16: calendering process - calendering is all done by hand, and a special calender knife is used to push back and forth on the jewelry surface. This process requires certain technology and techniques
step 17: polishing process
-
polish the jewelry with a polishing machine until the surface is smooth and bright
step 18: select diamonds - manually sort the diamonds, select the ones that match the color, cutting and size, and prepare for inlay
step 19: set diamonds – set each diamond by hand
step 20: quality control - carefully inspect the finished jewelry one by one to ensure the qualified quality.