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Plastic lamp cover for vehicle and adding plastic injection process of additive
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An additive and plastic technology is applied in the field of plastic product manufacturing to achieve the effects of remarkable technical effect, simple operation and low cost
Inactive Publication Date: 2015-11-18
上海蓝佩得模具科技有限公司
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Abstract
Description
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Problems solved by technology
[0005] Now, the problem we have to solve is that in production practice, the plastics we produce for automobile lampshades are often engineering plastics or polymer-based composite materials, so that the characteristics of the plastics are determined, and the production and development of light diffusing agents We have no specific technical solutions for each plastic, including configuration and how to implement it, and even more environmental details, which requires us to explore and practice in the specific production process
Method used
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Embodiment 1
[0023] S1: Take the polyol and isocyanate separately with the take-out cup, the mass ratio of the taken-up material is 1:2, and put them together in an environment with a temperature of 20°C;
[0024] S2: According to 4‰ of the total weight of polyols and isocyanates, the organosilicon light diffusing agent is reclaimed;
[0025] S3: Put the polyol, isocyanate and silicone light diffusing agent into the airtight container of the vacuum mixer, set the temperature at 30-40°C, stir after vacuuming, the stirring speed is 6000 rpm, the stirring time 10 minutes;
[0026] S4: Preheat the silicone mold to 50°C;
[0027] S5: Take out the material obtained after stirring, put it into the vacuum injection molding machine, extract the vacuum and inject it into the preheated silicone mold;
[0028] S6: Put the silicone mold into the oven, set the temperature at 50°C, and cure and demould after 120 minutes.
Embodiment 2
[0030] S1: Take the polyol and isocyanate separately with the take-out cup, the mass ratio of the taken-up material is 1:2, and put them together in an environment with a temperature of 20°C;
[0031] S2: According to 7 ‰ of the total weight of polyols and isocyanates, the organosilicon light diffusing agent is reclaimed;
[0032] S3: Put the polyol, isocyanate and silicone light diffusing agent into the airtight container of the vacuum mixer, set the temperature at 30-40°C, stir after vacuuming, the stirring speed is 6000 rpm, the stirring time 10 minutes;
[0033] S4: Preheat the silicone mold to 50°C;
[0034] S5: Take out the material obtained after stirring, put it into the vacuum injection molding machine, extract the vacuum and inject it into the preheated silicone mold;
[0035] S6: Put the silicone mold into the oven, set the temperature at 50°C, and cure and demould after 120 minutes.
Embodiment 3
[0037] S1: Take the polyol and isocyanate separately with the take-out cup, the mass ratio of the taken-up material is 1:2, and put them together in an environment with a temperature of 20°C;
[0038] S2: Take out the organic silicon light diffusing agent according to 10‰ of the total weight of polyol and isocyanate;
[0039] S3: Put the polyol, isocyanate and silicone light diffusing agent into the airtight container of the vacuum mixer, set the temperature at 30-40°C, stir after vacuuming, the stirring speed is 6000 rpm, the stirring time 10 minutes;
[0040] S4: Preheat the silicone mold to 50°C;
[0041] S5: Take out the material obtained after stirring, put it into the vacuum injection molding machine, extract the vacuum and inject it into the preheated silicone mold;
[0042] S6: Put the silicone mold into the oven, set the temperature at 50°C, and cure and demould after 120 minutes.
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Abstract
The invention discloses a plastic lamp cover for a vehicle and an adding process of an additive. The adding process comprises the following steps: (S1) polyol and isocyanate are respectively taken by taking cups by a taking mass ratio of 1: 2, and are put in an environment with a temperature of 20 DEG C; (S2) an organic silicon light diffusion agent being 0.4%-1.6% of the total weight of polyol and isocyanate is taken; (S3) the polyol, the isocyanate and the organic silicon light diffusion agent are put in a closed container of a vacuum stirrer at a temperature of 30-40 DEG C, are stirred for 10 minutes with the speed of 6000 r / m after being vacuumized; (S4) a silicone mold is preheated to a temperature of 50 DEG C; (S5) the material obtained by stirring is taken out, is added in a vacuum injection machine, and is injected into the preheated silicone mold after being vacuumized; and (S6) the silicone mold is put in an oven at a temperature of 50 DEG C for 120 minutes, and then is cured and demolded. The plastic lamp cover for the vehicle can be manufactured according to the method. The produced plastic lamp cover for the vehicle can enable an area light source formed by penetrating through light rays emitted by a point light source to be mild in light ray and high in brightness.
Description
technical field [0001] The invention relates to the technical field of plastic product manufacturing, in particular to an injection molding process of plastic lampshades and additives for automobiles. Background technique [0002] Plastic additives refer to chemical substances dispersed in the molecular structure of plastics, which will not seriously affect the molecular structure of plastics, but can improve their properties or reduce costs. The addition of additives can promote plastics to improve the processability, physical and chemical properties of the substrate and increase the physical and chemical properties of the substrate. [0003] The light diffusing agent is a microsphere product developed by means of cross-linking and grafting functional groups using polymerpolymerization technology. It can be added to PC, PVC, PS, PMMA, PET, epoxy resin and other transparent resins and LEDs (light emitting diodes) to increase the scattering and transmission of light, while ...
Claims
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Application Information
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