Manufacturing method of automobile sound insulation pad
A technology of automobile sound insulation pad and manufacturing method, which is applied in the directions of chemical instruments and methods, lamination and layered products, etc., can solve the problems of complicated adjustment of acoustic performance, complicated production process, increase of production cost, etc., so as to ensure safety and save money. The effect of labor and productivity improvement
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[0021] Example 1
[0022] (1) Paving materials: such as figure 1 As shown, the paving materials are stacked in the order of the soft layer fiber felt 1, the air-permeable sound-absorbing film 2, and the hard layer fiber felt 3 from bottom to top. The breathable sound-absorbing film is a PE breathable sound-absorbing film.
[0023] The composition of the soft layer fiber felt is 20% by mass polyester fiber, 20% low-melting polyester fiber, 60% cotton fiber and chemical synthetic fiber regenerated fiber; surface density: 500g / m 2 .
[0024] The composition of the hard layer fiber felt is 10% polyester fiber, 30% low-melting polyester fiber, 60% cotton fiber and chemical synthetic fiber regenerated fiber; surface density: 500g / m 2 .
[0025] (2) Compression molding: Put the laid material into the molding mold for compression molding, the upper mold is evacuated to form an air bag in the product part, and high temperature steam is introduced to heat the material to obtain a semi-finished ...
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[0030] Example 2
[0031] (1) Paving: stack the paving in the order from bottom to top soft layer fiber felt, breathable sound-absorbing film and hard layer fiber felt;
[0032] (2) Compression molding: Put the laid material into the molding mold for compression molding, the upper mold is evacuated to form an air bag in the product part, and high temperature steam is introduced to heat the material to obtain a semi-finished product; molding conditions: steam pressure : 3Mpa; steam temperature: 220℃; molding pressure: 10Mpa; molding time: 60s; vacuum pressure: 0.03Mpa; vacuum time: 20s after molding;
[0033] (3) Cooling and shaping: put the pressed semi-finished product into a cooling jig, and perform cooling and shaping at room temperature. Cooling time: 55s;
[0034] (4) Cutting: Use a punching device or water jet to cut the dimensions and hole positions to obtain the product car sound insulation pad; punching device: punching pressure: 10Mpa, punching time: 10s; waterjet: cutting p...
Example Embodiment
[0036] Example 3
[0037] (1) Paving: stack the paving in the order from bottom to top soft layer fiber felt, breathable sound-absorbing film and hard layer fiber felt;
[0038] (2) Compression molding: Put the laid material into the molding mold for compression molding, the upper mold is evacuated to form an air bag in the product part, and high temperature steam is introduced to heat the material to obtain a semi-finished product; molding conditions: steam pressure : 2Mpa; steam temperature: 200℃; molding pressure: 7Mpa; molding time: 50s; vacuum pressure: 0.02Mpa; vacuum time: 15s after molding;
[0039] (3) Cooling and shaping: Put the pressed semi-finished product into a cooling jig, and cool and shape it at room temperature. Cooling time: 40s;
[0040] (4) Cutting: Use a punching device or water jet to cut the shape and hole position, punching device: punching pressure: 7Mpa, punching time: 5sec;
[0041] (5) Inspection: After passing the inspection without defects, it shall be p...
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