The choice of the form of the mold and the mold line selection is very important, modulo convenient parting line should be selected without affecting the overall effect of the product does not affect the quality of products, such as Fountain parting line position too high seal parting line material and more prone to cracking products; reduce processes operating processes, such as opening half of the mold.
In order to prevent the flow of silicone four mold species with wooden or wood fixed in the scope of a rule, the opening piece mold with wood and sludge separated from the first open part of the sludge and mold species there is no gap between the surface of the sludge smooth. After completion of the work to prepare, and then cast or mold species coated with petroleum jelly or spray release agent, smooth with a clean cotton cloth soaked in Vaseline evenly on the mold species, the mold for 30 minutes species to fully absorb the Vaseline, and then a clean cotton cloth to clean the surface of the mold species, bright surface; texture of the product as long as evenly coated with Vaseline can be formulated silicone adjust. Silica deployment in accordance with the irregular direction stirred, so that the curing agent and the silicone mix thoroughly, minimize pumping a vacuum, the degree of vacuum in the air mixed with the gel, smooth product is preferably coated with a first layer of plastic-0.1Mpa required to maintain 7-8 seconds.
Silica Gel should be promptly after molding. With trickle down glue in the highest parts of the mold species, let the natural flowing stream no place where painting brush in place, if it is not only fills the entire piece silicone mold and also on the clay brush evenly. Each item is at least a thickness of each layer of silica gel brush Layer Silicone 1mm, the requirements of each layer cured to authorize another layer in the process of silica gel brush in the brush of the third layer is to be added in the second layer at a layers of gauze to increase the strength of the silica gel. The entire silicone mold part different requirements depending on the size of the product control the thickness 3-4mm, width not greater than the width 60 mm. Silica gel solidification time of 20 minutes.
1, the master mold wash, dry, smooth handling (playing with a layer of mold release wax or brushing again release agent)
2, 500-1000 grams of silicon rubber mold (silicone mold, plastic mold, silicone rubber, silicone) Sheng, such as plastic basin reserve;
3, the hardening agent was added according to the weight ratio (typically 1.5-2.5%) after weighing container were mixed and and sufficiently stirred uniformly; 4, depending on the circumstances (in particular the first layer) adding a certain amount of silicone diluent. Until the mix until evenly, usually 3-5 minutes. 5. Silicon rubber mold (silicone mold, plastic mold, a silicone rubber, silicone) with hardener mixed, i.e. at room temperature the reaction mixture, and the release of a low molecular weight alcohol, the alcohol molecules from the colloid, under negative pressure discharge bulbs 1-3 minutes. Without the aid of equipment (depending on the experience of the mold division)
6, multi-piece mold brushing should be followed within, and outside at the same time curing is appropriate. The amount of curing agent is relatively small, the longer reaction time, the reaction fully, colloidal like, and therefore the amount of curing agent is preferably within at least the outer. The Brushing be the first layer dry and then brush the second layer (inner layer). The operating time of 30-50 minutes, the removal time of 10-15 hours. Curing time of 24 hours. Note brushing, plus the best in the two-story such as mold cloth, which can greatly improve the life of the mold (but must not use glass fiber cloth, or likely to cause stratification of the entire mold scrapped)
7, three-dimensional perfusion mode, usually 10-15 hours curing.
8, after the completion of the soft mold making, but also of the coat of plaster or glass fiber reinforced plastic to support soft silicone mold Note:
1, the parting line option: Select position does not affect the appearance of the product; after grouting easy processing; mold itself easy form removal position; choose not easily deformed position
2, must not catch the production schedule blindly increase the amount of hardener, otherwise it will greatly reduce the life of the silicone mold.