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FRP ship vacuum introduction process technical flow

The first step: start work


    Firstly, steel or wood molds are made according to the ship's profile and size. The inner surface treatment of the mold must ensure high hardness and high gloss, and the edge of the mold should be at least 15cm to facilitate the laying of seals and pipelines. After the mold is cleaned, the mold release material is applied, and the mold wax or the mold release water can be removed.


Step 2: Apply hull gel coat


    According to the requirements of the ship's production and production, the gel coat resin containing the catalyst/advancing agent is coated on the inner surface of the mold, and the product may be coated with a gel coat or a gel coat, and the type of o-benzene, m-benzene and vinyl may be selected. Hand brush and spray can be used for construction.


Step 3: Spreading reinforcement


    Firstly, according to the hull line type and basic structure, the reinforcing material and the skeleton core material are respectively cut, and then laid in the mold according to the layering diagram and the molding process. When laying, the influence of the material and connection method of the reinforcing material on the flow rate of the resin must be fully considered.


Step 4: Laying vacuum auxiliary materials


    On the reinforcing material laid in the mold, the release cloth is first laid, followed by the flow guiding cloth, and finally the vacuum bag, and the sealing strip is used for compaction and sealing. Carefully consider the direction of the resin and the vacuum line before closing the vacuum bag.


Step 5: Remove the vacuum inside the bag


    After the above materials are laid in the mold, the resin on the clamping pipe system is introduced into the pipe, and the whole system is evacuated by a vacuum pump, the air in the system is evacuated as much as possible, and the overall airtightness is checked, and the leaking place is performed. Partial patching.


Step 6: Adjust the proportion of resin


    After the vacuum in the bag reaches a certain requirement, the resin, the curing agent and other main engines are formulated according to the environmental conditions, the thickness of the product, the laying area, and the like. The formulated resin solution should have a proper viscosity, a suitable gel time, and an expected degree of cure.


Step 7: Mold lead resin


    The prepared resin is guided by a pressure pump, and the bubbles in the resin are thoroughly stirred to remove the air bubbles in the order of the guide, and the resin is guided by the constant adjustment of the pump pressure to effectively control the thickness of the ship's hull.


Step 8: Curing the demoulding armor


    After the resin is completed, the hull should be left in the mold for a period of time to cure the resin, generally not less than 24h, and can be demolded after its Bakr hardness is greater than or equal to 40. After demolding, the necessary measures should be taken to support it to avoid deformation. After thoro


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