Manufacturing process for sound-insulation, heat-insulation and shock-resistant sealing gasket of automobile

Abstract

The invention discloses a manufacturing process of an automobile sound-insulation heat-insulation anti-seismic sealing gasket, which comprises the following steps: providing an EVA (Ethylene Vinyl Acetate) foaming material, an auxiliary agent, a foaming agent and a curing agent, and conveying into a hot melting mixer for hot melting mixing to form a viscous substance; injecting the mixed material into an injection molding machine, heating to a certain temperature, pressing the material into a mold by a compression pump, coating a layer of amino silicon oil on the surface of the mold in advance, and finally forming a required shape; after injection molding, the EVA foam pad is taken out and cooled to obtain an EVA foam pad, and the EVA foam pad is fed into a glue dipping pool and dip-coated with a layer of mixed glue solution of phenolic resin and a light curing agent; taking out the glued EVA foaming pad, preheating and drying, and then hot-pressing and adhering a layer of non-woven fabric to form the automobile sound insulation and heat insulation pad; and the automobile sound insulation and heat insulation pad is subjected to coating treatment. A layer of amino silicon oil is coated in a forming mold of the EVA foaming pad, demolding is facilitated, meanwhile, the mixed glue solution of the phenolic resin and the light curing agent on the outer layer is matched, the non-woven fabric can be more effectively bonded, and the stability is improved; and the non-woven fabric and the EVA foaming pad are matched with each other to enhance the sound insulation, heat insulation and shock resistance effects.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile sound insulation and heat insulation pads, and in particular relates to a manufacturing process of automobile sound insulation and heat insulation anti-vibration sealing pads. Background Art

[0002] The car lining sound insulation and heat insulation sealing components are designed to achieve the NVH performance of the whole vehicle. They include front wall sound insulation pads, carpets, engine hood insulation cotton, ceiling sound-absorbing cotton, spare tire cover, etc. They are a practical method that can effectively block the transmission of noise during the transmission process and play a heat insulation effect. At present, the sound insulation and heat insulation sealing components all use a whole piece of PU foam pad, which has a protective and heat insulation effect, but has poor noise absorption. In addition, the car is affected by its own power components or the external environment temperature, which will cause the whole piece to heat up and deform, affecting the overall strength and durability. Summary of the invention

[0003] In view of this, the technical problem to be solved by the present invention is to provide a manufacturing process for automobile sound insulation, heat insulation and shock-resistant sealing pads, so as to avoid the trouble of the previous sound insulation and heat insulation parts with a single structure and poor overall heat insulation and sound insulation effects.

[0004] In order to solve the above technical problems, the present invention discloses a manufacturing process of a sound-insulating, heat-insulating and anti-vibration sealing pad for an automobile, which comprises: Step a. providing an EVA foaming material, an additive, a foaming agent and a curing agent, and conveying them to a hot melt mixer for hot melt mixing to form a viscous substance; Step b. Inject the mixed material into the injection molding machine, heat it to a certain temperature, and then use a compression pump to press the material into the mold. The mold surface is pre-coated with a layer of amino silicone oil to finally form the desired shape; Step c. After injection molding, take it out and cool it to obtain an EVA foam pad, send the EVA foam pad into a dipping tank, and dip it into a layer of a mixed glue solution of phenolic resin and light curing agent; Step d. Take out the EVA foam pad coated with glue, preheat and dry it, and then hot-press and adhere a layer of non-woven fabric to form a car sound insulation pad; Step e. coating the automobile sound insulation and heat insulation pad.

[0005] According to one embodiment of the present invention, a plurality of regular hexagonal grooves are provided on the surface of the mold.

[0006] According to one embodiment of the present invention, the mass ratio of the mixed glue of the phenolic resin and the light curing agent is 10:1.

[0007] According to one embodiment of the present invention, the preheating temperature in the above step d is 30-45°C.

[0008] According to one embodiment of the present invention, in the above step d, ultraviolet light curing is simultaneously performed during the preheating and drying process.

[0009] According to one embodiment of the present invention, the thickness of the nonwoven fabric is 0.10-1.0 mm.

[0010] Compared with the prior art, the present invention can achieve the following technical effects: By coating a layer of amino silicone oil inside the molding mold of the EVA foam pad, it is easy to demold. At the same time, the mixed glue of phenolic resin and light curing agent in the outer layer can more effectively adhere to the non-woven fabric and improve stability. The cooperation between the non-woven fabric and the EVA foam pad can enhance the sound insulation, heat insulation and earthquake resistance.

[0011] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time. DETAILED DESCRIPTION

[0012] The following will describe the implementation methods of the present invention in detail with reference to examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0013] The invention discloses a manufacturing process of a sound-insulating, heat-insulating and anti-vibration sealing pad for an automobile, which comprises: Step a. Providing EVA foaming material, additives, foaming agent and curing agent, conveying them to a hot melt mixer for hot melt mixing to form a viscous substance, and providing the main material of the sealing gasket; Step b. Inject the mixed material into the injection molding machine, heat it to a certain temperature, and then use a compression pump to press the material into the mold. The mold surface is pre-coated with a layer of amino silicone oil, and finally the desired shape is formed. The amino silicone oil is easy to demold; Step c. After injection molding, take it out and cool it to obtain an EVA foam pad, send the EVA foam pad into a dipping tank, and dip it into a layer of mixed glue of phenolic resin and light curing agent; phenolic resin can enhance fire resistance, and at the same time, hot pressing bonding effect is better, and light curing agent can improve colloid curing efficiency; Step d. Take out the EVA foam pad coated with glue, preheat and dry it at a preheating temperature of 30-45°C, and cure it with ultraviolet light at the same time, and then hot-press and adhere a layer of non-woven fabric to form a car sound insulation and heat insulation pad, which has good sound insulation and heat insulation properties; Step e. coating the automobile sound insulation and heat insulation pad.

[0014] In a preferred embodiment, a plurality of regular hexagonal grooves are provided on the surface of the mold, so that the thermal insulation and sound insulation pad body can have corresponding hexagonal protrusions, thereby improving the noise absorption effect and enhancing the thermal insulation performance.

[0015] The mass ratio of the mixed glue of phenolic resin and light curing agent is 10:1, and the hot pressing bonding effect is good.

[0016] In addition, the non-woven fabric has a thickness of 0.10-1.0mm, is light and durable, and has good wear resistance.

[0017] In summary, the present invention coats a layer of amino silicone oil in the molding mold of the EVA foam pad to facilitate demolding, and at the same time, a mixed glue solution of phenolic resin and photocuring agent in the outer layer can more effectively adhere to the non-woven fabric and improve stability; the non-woven fabric and the EVA foam pad cooperate with each other to enhance the sound insulation, heat insulation and shock resistance.

[0018] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A manufacturing process for automobile sound insulation, heat insulation and anti-vibration sealing pads, characterized in that: include: Step a. providing an EVA foaming material, an additive, a foaming agent and a curing agent, and conveying them to a hot melt mixer for hot melt mixing to form a viscous substance; Step b. Inject the mixed material into the injection molding machine, heat it to a certain temperature, and then use a compression pump to press the material into the mold. The mold surface is pre-coated with a layer of amino silicone oil to finally form the desired shape; Step c. After injection molding, take it out and cool it to obtain an EVA foam pad, send the EVA foam pad into a dipping tank, and dip it into a layer of a mixed glue solution of phenolic resin and light curing agent; Step d. Take out the EVA foam pad coated with glue, preheat and dry it, and then hot-press and adhere a layer of non-woven fabric to form a car sound insulation pad; Step e. coating the automobile sound insulation and heat insulation pad.

2. The manufacturing process of the automobile sound insulation, heat insulation and anti-vibration sealing gasket according to claim 1 is characterized in that: The mold surface is provided with a plurality of regular hexagonal grooves.

3. The manufacturing process of the automobile sound insulation, heat insulation and anti-vibration sealing gasket according to claim 1 is characterized in that: The mass ratio of the mixed glue of the phenolic resin and the light curing agent is 10:

1.

4. The manufacturing process of automobile sound insulation, heat insulation and anti-vibration sealing pad according to claim 1, characterized in that: The preheating temperature in step d is 30-45°C.

5. The manufacturing process of automobile sound insulation, heat insulation and anti-vibration sealing pad according to claim 1, characterized in that: In the step d, ultraviolet light curing is performed simultaneously during the preheating and drying process.

6. The manufacturing process of automobile sound insulation, heat insulation and anti-vibration sealing gasket according to claim 1, characterized in that: The nonwoven fabric has a thickness of 0.10-1.0 mm.