ची मुख्य मोल्डिंग पद्धत काय आहे इपॉक्सी ग्लास फायबर बोर्ड

1. हात घालणे-ओले मांडणी

Apply a release agent and a layer of medium-active liquid thermosetting resin with a viscosity of 0.3-0.4PaS to the surface of the mold in turn (after the gel coat is coagulated) and a layer of fiber reinforced materials. The fiber reinforced materials have surface felt and non-twisted coarse There are several kinds of gauze (checkered cloth). Use a hand-held roller or brush to impregnate the fiber reinforced material with resin, drive out air bubbles, and compact the base layer. The layup operation is repeated many times until the design thickness of the product is reached. The resin is cured at room temperature due to polymerization reaction. Can be heated to accelerate curing. At present, hand lay-up is the main form in my country, which accounts for about 80% of resin-based composite materials.

2. राळ इंजेक्शन आणि राळ हस्तांतरण RTM मोल्डिंग

आरटीएम ही बंद-मोल्ड लो-प्रेशर मोल्डिंग पद्धत आहे. वरच्या आणि खालच्या साच्यांमध्ये फायबर-प्रबलित सामग्री ठेवा; मूस बंद करा आणि मूस क्लॅंप करा; दबावाखाली राळ इंजेक्ट करा; राळ बरे झाल्यानंतर साचा उघडा आणि उत्पादन काढा. रेझिन जिलेशन प्रक्रिया सुरू होण्यापूर्वी, राळ साच्याच्या पोकळीत भरणे आवश्यक आहे आणि दबाव राळला साच्यात त्वरीत हस्तांतरित करण्यास आणि फायबर सामग्रीला गर्भवती करण्यास प्रवृत्त करतो.

3. शीट एसएमसी (बल्क बीएमसी) चे मोल्डिंग

Add initiators, fillers, pigments, internal mold release agents, low-shrinkage additives, thickeners, etc. into the resin, and mix them to form a resin paste. The resin paste falls on the lower film of the SMC unit (commonly used polyethylene film or nylon film), and at the same time, it settles on the lower film and chopped into 25～55mm glass fiber strands, and then is covered with a layer of film to become a sheet. Sandwich roll. Store the coil for several days to thicken the material to reach a moldable viscosity. SMC is supplied as a backup in a bundled state. The coil is unrolled, cut, weighed, put in the heated steel mold platinum, pressurized to solidify and mold, and then the finished product is obtained.