Craft production common problems and solutions

Time:

2023-03-13

Water lines, sticky hands, forming reasons: poor mold texture, mold is not dry enough. Solution: Use good silicone mold and keep the mold clean and dry.

1. Water pattern and sticky hand

Formation reason: mold texture is poor, mold is not dry enough.

Solution: Use good silicone mold and keep the mold clean and dry.

Formation reason: the gelling time is slow.

Solution: increase the amount of accelerant and curing agent.

Cause of formation: improper ratio of accelerator and curing agent.

Solution: The addition of curing agent is generally controlled at 1% ~ 1.5%, should not be too little.

Formation reason: curing agent quality is poor.

Solution: Use relatively fresh, good quality curing agent.

Formation reason: stone powder wet.

Solution: Pay attention to the storage environment of stone powder and use dry stone powder.

Formation reason: demoulding time is improper.

Solution: release time depends on the product, the release of general products can be selected in 3 ~ 5 times the cementing time.

2. Burst

Formation reasons: too many accelerators and curing agents are added, and the product will burst or be brittle due to too high caloric value during production.

Solution: less promoter, curing agent force.

Formation reason: metal fittings are added into the products, and stress is generated between the resin.

Solution: Choose the resin with smaller shrinkage or add some flexible resin in the handicraft resin to enhance toughness.

Formation reason: product baking temperature is too high.

Solution: Bake at the right temperature.

Formation reason: low temperature intolerance.

Solution: It is recommended to use 399A and other frost resistant resin.

3. Go limp

Formation reason: too little curing agent.

Solution: The addition of curing agent is generally controlled at 1% ~ 1.5%, should not be too little.

Formation reason: the curing agent quality is too poor.

Solution: Use better curing agent.

4, the gelation time is too fast or too slow

Formation reasons: too much or too little accelerators and curing agents are added during production.

Solution: According to product requirements to control the ratio of accelerator, curing agent.

5. Oil hole

Formation reason: In order to better vacuum, too much oil substances.

Solution: try not to add fuel to the substance.

Cause of formation: there is no solution in the resin

Solution: Remove insoluble substances.

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