LED fluorescent cover and preparation method thereof

Abstract

A Light Emitting Diode (LED) fluorescent cover comprises the following components by weight: 90-96% of single-component solid silicone rubber, 3-8% of fluorescent powder and 1-2% of vulcanizer; and the preparation method includes the following steps: step 1): using mixed compound of the single-component solid silicone rubber, as well as the fluorescent powder and the vulcanizer as raw material to mix, standing for 2-4 h after mixing with open mill or internal mixer; step 2): controlling temperature, pressure and vulcanization time of vulcanizing machine according to size of the fluorescent cover mold, using the vulcanizing machine to carry out first vulcanization to the raw material that is obtained from the step 1) and placed in the fluorescent cover mold; step 3): with combined action of blower gun, taking the fluorescent cover out slowly; step 4): baking the semi-finished product in a closed space at a temperature of 150-200 C. for 1-2 h.

Claims

1. A preparation method of LED fluorescent cover, including the following steps: step 1): mixing materials: using a single-component solid silicone rubber, a fluorescent powder and a vulcanizer as raw material to mix, standing for 2-4 h after mixing with open mill or internal mixer; step 2): first vulcanization: controlling temperature, pressure and vulcanization time of vulcanizing machine according to size of a fluorescent cover mould, using the vulcanizing machine to carry out first vulcanization to the raw material that is obtained from the step of mixing material and placed in the fluorescent cover mould, surface of the fluorescent cover mould needing to be subjected to sand blasting treatment; step 3): taking out semi-finished product: with combined action of blower gun, taking the fluorescent cover out slowly from the fluorescent cover mould; step 4): second vulcanization: baking the semi-finished product in a closed space at a temperature of 150-200 C. for 1-2 h.

2. The preparation method of LED fluorescent cover according to claim 1, wherein in step 2), size of the fluorescent cover mould is as follows accordingly: being capable of molding 164 fluorescent covers with a diameter of 14 mm, a height of 16 mm and a thickness of 1.5 mm; temperature of the vulcanizing machine being controlled to be 150-170 C.; the pressure being 150-180 MPa; vulcanization time being 220-250 S; the temperature in the closed space in the second vulcanization step is controlled to be 180 C., and the baking time being 2 h.

3. The preparation method of LED fluorescent cover according to claim 1, wherein in step 2), size of the fluorescent cover mould is as follows accordingly: being capable of molding 130 fluorescent covers with a diameter of 20 mm, a height of 21.5 mm and a thickness of 1.5 mm; temperature of the vulcanizing machine being controlled to be 150-170 C.; the pressure being 200-250 MPa; vulcanization time being 250-280 S; the temperature in the closed space in the second vulcanization step is controlled to be 180 C., and the baking time being 2 h.

4. The preparation method of LED fluorescent cover according to claim 1, wherein in step 2), size of the fluorescent cover mould is as follows accordingly: being capable of molding 50 fluorescent covers with a diameter of 29 mm, a height of 13 mm and a thickness of 1.5 mm; temperature of the vulcanizing machine being controlled to be 150-170 C.; the pressure being 200-250 MPa; vulcanization time being 320-380 S; the temperature in the closed space in the second vulcanization step is controlled to be 180 C., and the baking time being 2 h.

5. The preparation method of LED fluorescent cover according to claim 1, wherein glass sand, corundum or mixed sand is blasted to the surface of the fluorescent cover mould.

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(1) The following is the further description of the present invention in combination with embodiments.

Embodiment 1

(2) An LED fluorescent cover as shown in the embodiment is comprised of the following components by weight:

(3) 95-96% of single-component solid silicone rubber, 3% of fluorescent powder and 1-2% of vulcanizer,

(4) The single-component solid silicone rubber is also called single-component mixing type silicone rubber, generally in a semi-solid state before processing. It is stuffed into metallic mould in use and cured by a flat vulcanizing machine or other vulcanizing machines under a condition of high temperature and high pressure. The single-component silicone rubber is so called to distinguish the bi-component silicone rubber. The difference from the bi-component silicone rubber is that it is not necessary to add adhesive (curing agent) into the single-component silicone rubber, because the latent curing agent has already added into the production formula. This type of curing agent can start to react and cure when it meets either proper high temperature or proper water molecules.

(5) The model number of the fluorescent powder is: NS550/NS565/NS600.

(6) The model number of the vulcanizer is: C-15.

(7) The color temperature of the LED fluorescent cover of the embodiment is 7000K.

(8) A preparation method of the above LED fluorescent cover, comprising the following steps:

(9) Step 1): mixing materials: using formula amount of the single-component solid silicone rubber, the fluorescent powder and the vulcanizer as raw material to mix, standing for 2-4 h after mixing with open mill or internal mixer;

(10) Step 2): sand blasting: the surface of the fluorescent cover mould is subjected to sand blasting treatment according to actual requirements; if the surface of the fluorescent cover mould is necessary to be glossy, glass sand is blasted to surface of the fluorescent cover mould; if the surface of the fluorescent cover mould is necessary to be matte, the corundum or mixed sand is blasted to surface of the fluorescent cover mould; if there is no specific requirement, mixed sand is blasted to surface of the fluorescent cover mould.

(11) Step 3): first vulcanization: according to size of the fluorescent cover mould, being capable of molding 164 fluorescent covers with a diameter of 14 mm, a height of 16 mm and a thickness of 1.5 mm; controlling the temperature of the vulcanizing machine to be 150-170 C.; the pressure being 150-180 MPa; vulcanization time being 220-250 S; using the vulcanizing machine to carry out first vulcanization to the raw material that is obtained from the step of mixing material and placed in the fluorescent cover mould;

(12) Step 4): taking out semi-finished product: with combined action of blower gun, slowly taking out the fluorescent cover, the semi-finished product obtained after the first vulcanization, from the fluorescent cover mould;

(13) Step 5): second vulcanization: baking the semi-finished product in a vertical oven at a temperature of 180 C. for 2 h to obtain the plate like LED fluorescent cover sheet;

(14) Step 6): manufacturing finished products: releasing the plate like LED fluorescent cover manually or by punching process to obtain the separate LED fluorescent cover product.

(15) The LED fluorescent cover obtained in the embodiment 1 has advantages of low cost, high luminousness, uniform emitted light, long service life and optical coherence.

Embodiment 2

(16) An LED fluorescent cover as shown in the embodiment is comprised of the following components by weight:

(17) 91-92% of single-component solid silicone rubber, 7% of fluorescent powder and 1-2% of vulcanizer,

(18) The color temperature of the LED fluorescent cover of the embodiment is 2700K.

(19) A preparation method of the above LED fluorescent cover, comprising the following steps:

(20) Step 1): mixing materials: using formula amount of the single-component solid silicone rubber, the fluorescent powder and the vulcanizer as raw material to mix, standing for 2-4 h after mixing with open mill or internal mixer;

(21) Step 2): sand blasting: the surface of the fluorescent cover mould is subjected to sand blasting treatment according to actual requirements; if the surface of the fluorescent cover mould is necessary to be glossy, glass sand is blasted to surface of the fluorescent cover mould; if the surface of the fluorescent cover mould is necessary to be matte, the corundum or mixed sand is blasted to surface of the fluorescent cover mould; if there is no specific requirement, mixed sand is blasted to surface of the fluorescent cover mould.

(22) Step 3): first vulcanization: according to size of the fluorescent cover mould, being capable of molding 130 fluorescent covers with a diameter of 20 mm, a height of 21.5 mm and a thickness of 1.5 mm; controlling the temperature of the vulcanizing machine to be 150-170 C.; the pressure being 200-250 MPa; vulcanization time being 250-280 S; using the vulcanizing machine to carry out first vulcanization to the raw material that is obtained from the step of mixing material and placed in the fluorescent cover mould;

(23) Step 4): taking out semi-finished product: with combined action of blower gun, slowly taking out the fluorescent cover, the semi-finished product obtained after the first vulcanization, from the fluorescent cover mould;

(24) Step 5): second vulcanization: baking the semi-finished product in a vertical oven at a temperature of 180 C. for 2 h to obtain the plate like LED fluorescent cover sheet;

(25) Step 6): manufacturing finished products: releasing the plate like LED fluorescent cover manually or by punching process to obtain the separate LED fluorescent cover product.

(26) The LED fluorescent cover obtained in the embodiment 2 has advantages of low cost, high luminousness, uniform emitted light, long service life and optical coherence.

Embodiment 3

(27) An LED fluorescent cover as shown in the embodiment is comprised of the following components by weight:

(28) 92.5-93.5% of single-component solid silicone rubber, 5.5% of fluorescent powder and 1-2% of vulcanizer,

(29) The color temperature of the LED fluorescent cover of the embodiment is 4850K.

(30) A preparation method of the above LED fluorescent cover, comprising the following steps:

(31) Step 1): mixing materials: using formula amount of the single-component solid silicone rubber, the fluorescent powder and the vulcanizer as raw material to mix, standing for 2-4 h after mixing with open mill or internal mixer;

(32) Step 2): sand blasting: the surface of the fluorescent cover mould is subjected to sand blasting treatment according to actual requirements; if the surface of the fluorescent cover mould is necessary to be glossy, glass sand is blasted to surface of the fluorescent cover mould; if the surface of the fluorescent cover mould is necessary to be matte, the corundum or mixed sand is blasted to surface of the fluorescent cover mould; if there is no specific requirement, mixed sand is blasted to surface of the fluorescent cover mould.

(33) Step 3): first vulcanization: according to size of the fluorescent cover mould, being capable of molding 50 fluorescent covers with a diameter of 29 mm, a height of 13 mm and a thickness of 1.5 mm; controlling the temperature of the vulcanizing machine to be 150-170 C.; the pressure being 200-250 MPa; vulcanization time being 320-380 S; using the vulcanizing machine to carry out first vulcanization to the raw material that is obtained from the step of mixing material and placed in the fluorescent cover mould;

(34) Step 4): taking out semi-finished product: with combined action of blower gun, slowly taking out the fluorescent cover, the semi-finished product obtained after the first vulcanization, from the fluorescent cover mould;

(35) Step 5): second vulcanization: baking the semi-finished product in a vertical oven at a temperature of 180 C. for 2 h to obtain the plate like LED fluorescent cover sheet;

(36) Step 6): manufacturing finished products: releasing the plate like LED fluorescent cover manually or by punching process to obtain the separate LED fluorescent cover product.

(37) The LED fluorescent cover obtained in the embodiment 3 has advantages of low cost, high luminousness, uniform emitted light, long service life and optical coherence.

(38) At last, what to be specified is that the above embodiment is only used to explain the technical solution of the present invention, but not to limit the protective scope of the present invention. Although the present invention is explained in detail referring to preferable embodiment, the persons skilled in the art shall understand that it is possible to modify or equivalently replace the technical solution of the present invention without departing from the substance and scope of the technical solution of the present invention.