Commonly used three types of plastic molding: pressure molding, rolling molding, vacuum casting|www.easoar-soon.com
Rotary molding: molding process for high quality surface products, especially for PE,PA,PP,PVC,EVA etc
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Process cost: processing cost (medium), cost per unit (low - medium)
Representative products: furniture, toys, etc.
Suitable output: suitable for medium and low batch production (less than 10000 pieces)
Quality: the volume of the properly formed surface will be reduced by 3% after molding
Speed: long time per piece (30-60 minutes/piece)
Design suggestion: avoid sharp corners and hard edges.
The technological process
Step 1: The polymer particles are injected into the mold cavity.
The second step: heated mold, make the cavity melt into a liquid polymer particle, rotational mold, forcing polymer fluid in the mold cavity forming (25 minutes +)
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Step 3: Inject air until mold cools (25 minutes +)
Step 4: Demoulding, done.
Vacuum casting, plate type, small batch production.
Vacuum Casting (VacuumCasting): specialized in making delicate hand plate models and small batch reproduction technology, widely used for sample preview of injected products.
Plastic materials commonly used in vacuum casting are polypropylene and polypropylene.
The color choice and strength of the molded parts are very flexible, which is very suitable for product designers to customize the hand board.
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Process cost: Processing cost (low), unit cost (medium)
Typical products: hand-board models, consumer electronics, sports equipment, toys, etc. custom resin mold, custom silicone mold
Product applicability: suitable for single customization, small batch production.
Quality: the surface of the product is precisely formed, and the volume is reduced by 3% after forming
Speed: according to part size (45 minutes -4 hours/piece)
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Design Suggestions:
In the design process, the volume of the product should be considered (it is recommended that the weight of each piece be less than 2.5kg), because when the product hand plate is made by vacuum casting, the larger the volume, the greater the proportion of cooling shrinkage, the longer the time.
Try to avoid sharp product styling.
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The technological process
Preparation: turn two silicone moulds with a single finished product.
Step 1: Put the prepared two silicone molds together and place them in an environment of 65-70 degrees, so that the seams of the silicone molds begin to melt until seamless connection.
Step 2: Empty the air in the silicone mold, and pour the liquid PUR into the drainage tube until the mold cavity is filled.
Cool (45 minutes -4 hours)
Step 3: Cut two silicone molds, take out the finished product, and wait for trimming and polishing.
Compression molding for insulation insulation corrosion resistant products
OmpressionMolding: in the 1920s, was the first real representative of the human began to master the process of plastic processing, is also the representative process of making thermosetting plastics, suitable for the production of insulation insulation corrosion resistant products parts.
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Process cost: processing cost (middle), unit cost (low)
Typical products: automotive plastic parts, buttons, soles and other insulation and anti-corrosion products parts.
Suitable output: suitable for mass production.
Quality: high surface accuracy, suitable for decorative parts of the process
Speed: Plastic manufacturing cycle (2 minutes)
Easoar-soon offers custom resin mold, custom silicone mold,Sheet Metal and Injection Moulding services online.
Design Suggestions:
In the design process, the volume of the product should be considered (it is recommended that the weight of each piece be less than 2.5kg), because when vacuum casting is used to manufacture hand plate, the greater the cooling shrinkage ratio of the product, the longer the time.
Sharp styling should be avoided as far as possible
The technological process
Preparation: small thermosetting plastics or powder
Step 1: The quantitative thermosetting plastic block or powder is put into the mold and heated to 100 ° to improve the production efficiency and molding quality in the later stage.
Step 2: The two molds are slowly combined to ensure uniform force, and the mold temperature rises from 115 ° to 150 ° in 2 minutes.
Step 3: After waiting for complete cooling, the two molds are separated and the finished product is pushed out and finished.
