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A sound-absorbing damping plate and its processing technology

A processing technology and damping plate technology, applied in the field of automobile damping plate production, can solve the problems of poor stability and environmental pollution of superimposed damping plates, and achieve the effect of ensuring smooth appearance, taking into account flexibility, and strengthening sound absorption effect.

Active Publication Date: 2022-03-22
MAANSHAN LIANHONG SYNTHETIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that the sound-absorbing damping plate is likely to cause environmental pollution in specific applications and the stability of the superimposed damping plate is poor, the present invention provides a sound-absorbing damping plate and its processing technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The sound-absorbing damping plate of the present embodiment has a formula of parts by weight: c5 resin, 20-27, EVA resin 1-2, modified resin 6-8, mica powder 20-25, light calcium carbonate 15-20, heavy Calcium carbonate 10-13, sound-absorbing auxiliary agent 2-5, sound-absorbing auxiliary agent is modified starch.

[0038] The specific steps are as follows:

[0039] S1. Stirring synthesis: put the three kinds of resins, mica powder, light calcium carbonate, heavy calcium carbonate and modified starch in each weight part into the heating mixer in turn for hot-melt mixing and synthesis. The mixing time is 30-50min. The oil temperature is 225±25°C, and the return oil temperature is 210±20°C to ensure that the discharge temperature is ≥110°C;

[0040] S2. Extrusion: transfer the semi-fluid material after hot-melt synthesis into the extruder for strip processing;

[0041] S3, calendering: calendering the strips into sheets;

[0042] S4, film covering; the semi-finished pr...

Embodiment 2

[0045] The sound-absorbing damping plate of this embodiment and its processing technology, the steps of the substrate are as in Embodiment 1, but a more optimized solution: the formula is, in parts by weight: c5 resin is 23, EVA resin 2, modified resin 7, mica powder 23. Light calcium carbonate 17. Heavy calcium carbonate 12. Modified starch 3.

[0046] The specific steps are as follows:

[0047] S1. Stirring and synthesis: put the three kinds of resins, mica powder, light calcium carbonate, heavy calcium carbonate and modified starch in various parts by weight into the heating mixer in turn to carry out hot-melt mixing and synthesis, the mixing time is 50min, and the oil output temperature of the mixer 240°C, oil return temperature 210°C, to ensure that the discharge temperature is ≥110°C; the modified starch is colloidal in the semi-fluid, which improves the fusion degree of each component and plays an auxiliary role in noise reduction;

[0048] S2. Extrusion: transfer the ...

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Abstract

The invention discloses a sound-absorbing damping plate and a processing technology thereof, belonging to the technical field of automobile damping plate production. The formula of this application is that the parts by weight of each component are: resin 29-37, mica powder 20-25, calcium carbonate 25-33, and vibration-reducing and sound-absorbing auxiliary agent 2-5. In this component, the asphalt material that pollutes the environment is added 0 , and then through resin combined with inorganic materials such as mica powder and calcium carbonate to act as asphalt to achieve the ductility and flexibility of asphalt. The proportion of inorganic materials is large, accounting for more than 60%, which improves the heat resistance and flame retardancy of the product. It also balances the increased production cost due to the addition of resin, and, under the action of vibration-absorbing and sound-absorbing auxiliary agents and the segmented calendering and coating process, the inorganic components are fully integrated with the resin during the production process to achieve an effective vibration reduction effect , changing the propagation characteristics of the sound wave, increasing the energy loss of the sound, thereby reducing the noise.

Description

technical field [0001] The invention belongs to the technical field of automobile damping plate production, and more specifically relates to a sound-absorbing damping plate and its processing technology. Background technique [0002] At present, most cars use traditional asphalt damping plates. Asphalt is a brown-black organic gelatinous substance, including natural asphalt, petroleum asphalt, shale asphalt and coal tar asphalt. The main components of asphalt and its smoke are phenols, compounds, and asphalt and its smoke are phenols, compounds, anthracene, naphthalene, pyridine, etc., which are irritating to the skin and mucous membranes, and the asphalt damping board has a strong Carcinogenic effect, which will endanger the health of personnel, so how to reduce the impact of these harmful ingredients is an eternal problem faced by technicians. [0003] Moreover, with the advancement of manufacturing technology in the automobile industry, people are paying more and more at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/04B29D7/01C04B111/52C04B111/20C04B111/28
CPCC04B26/04B29D7/01C04B2111/52C04B2111/2046C04B2111/28C04B24/24C04B24/2623C04B14/20C04B14/28C04B24/38
Inventor 刘福吴铭伍国栋王国芝
Owner MAANSHAN LIANHONG SYNTHETIC MATERIALS