阅读说明：本技术 一种食品级硅胶玻纤增强烤垫生产工艺 (Production process of food-grade silica gel glass fiber reinforced baking pad ) 是由 李雨轩 李艳 于 2020-12-21 设计创作，主要内容包括：本发明公开的一种食品级硅胶玻纤增强烤垫生产工艺,首先对环保玉米淀粉型玻纤布进行高温烧结定型处理,不使用稀释剂,再将涂覆设备增加两根导辊一组刮刀,进行一次接头两次往复,两次刮胶,一次性涂覆较厚的硅胶烤垫。本发明属于硅胶烤垫技术领域,具体是一种通过对玻纤布进行高温烧结定型处理,使经纬线不位移,确保刮刀刮胶时,经纬线不变形,达到涂覆高粘度硅胶的目的,不使用稀释剂涂覆高粘度硅胶,排除了生产安全隐患,不存在易燃易爆物品,无有害物质排放,对空气无污染,生产更环保的食品级硅胶玻纤增强烤垫生产工艺。(The invention discloses a production process of a food-grade silica gel glass fiber reinforced baking pad. The invention belongs to the technical field of silica gel baking pads, and particularly relates to a production process for producing a food-grade silica gel glass fiber reinforced baking pad, which is characterized in that through high-temperature sintering and shaping treatment on glass fiber cloth, warp and weft are not displaced, the warp and weft are ensured not to be deformed when a scraper scrapes glue, the purpose of coating high-viscosity silica gel is achieved, no diluent is used for coating the high-viscosity silica gel, the potential safety hazard of production is eliminated, flammable and explosive articles are not present, no harmful substance is discharged, no pollution is caused to air, and the production is more environment-friendly.)

1. A production process of a food-grade silica gel glass fiber reinforced baking pad is characterized by comprising the following steps: the method comprises the following steps:

(1) rewinding the glass fiber cloth wound on the paper tube on a stainless steel densely-distributed hole shaft special for sintering through a special rewinding machine;

(2) transferring the pre-sintered glass fiber cloth in the step (1) to a special sintered steel bracket;

(3) pushing the arranged pre-sintered steel bracket into a special sintering furnace cavity, and aligning shaft holes at two ends of a stainless steel densely-distributed hole shaft with hot air circulation holes in the furnace cavity;

(4) adjusting the wind speed of a circulating wind motor of the sintering furnace, setting the sintering temperature of the sintering furnace to be 380-;

(5) when the temperature in the furnace chamber is cooled to be lower than 80 ℃, the special sintering steel frame is removed;

(6) moving the completely cooled glass fiber cloth to a special frame of a silica gel coating machine;

(7) guiding the completely cooled glass fiber cloth out of the oven by using a traction cloth, and adding silica gel into a front silica gel trough and a rear silica gel trough;

(8) stopping the machine to adjust the distance between the two scrapers, wherein the distance between the first group of scrapers is 0.55 mm according to the coating thickness, the distance between the two scrapers is 0.6 mm, the distance between the second group of scrapers is 0.7 mm, and the distance between the two scrapers is 0.8 mm, and restarting the machine to coat silica gel;

(9) and (3) when the fabric is dried to a semi-cured state, namely hand feeling is not sticky, processing the fabric into a shape and a size which are set by a customer, performing secondary high-temperature vulcanization and removing residues to ensure that the fabric meets the European standard of FDA, FRGB American standard.

2. The process for producing a food grade silica gel glass fiber reinforced baking pad according to claim 1, wherein the process comprises the following steps: and (4) the silica gel in the step (7) is high-viscosity silica gel and comprises silica gel, white carbon black and a coupling agent.

3. The process for producing a food grade silica gel glass fiber reinforced baking pad according to claim 1, wherein the process comprises the following steps: and the step (9) further comprises polishing the bottom layer of the glass fiber cloth.

4. The process for producing a food grade silica gel glass fiber reinforced baking pad according to claim 1, wherein the process comprises the following steps: the glass fiber cloth is environment-friendly corn starch type glass fiber cloth.

Technical Field

The invention belongs to the technical field of silica gel baking pad production, and particularly relates to a production process of a food-grade silica gel glass fiber reinforced baking pad.

Background

The silica gel pad has many purposes and is one of necessary tools in kitchen baking. Because it is anti-sticking and easy to clean, it can be used to make biscuits and the like with dough. Some silica gel pads also have high temperature resistance and can be used in ovens. At present, silica gel baking pads used in the market have heat-resistant performance, at present, enterprises producing the silica gel baking pads mostly adopt a secondary coating process, diluent such as No. 120 solvent oil (commonly called gasoline) or dimethylbenzene, DMC and the like is used for the first coating in a large quantity, and the solvent is discharged into the air in the drying process to generate air pollution. Most of the solvents are inflammable and extremely flammable, which causes potential safety hazards in production. And increases the production cost. The secondary coating increases the joint loss, further increases the material loss, and makes the production cost higher.

Disclosure of Invention

Aiming at the situation and overcoming the defects of the prior art, the invention provides a production process of a food-grade silica gel glass fiber reinforced baking pad, which is characterized in that high-temperature sintering and shaping treatment is carried out on glass fiber gridding cloth, the longitude and latitude lines are not displaced, the longitude and latitude lines are not deformed when a scraper scrapes glue, and the purpose of coating high-viscosity silica gel is achieved.

The technical scheme adopted by the invention is as follows: a production process of a food-grade silica gel glass fiber reinforced baking pad comprises the following steps:

(1) rewinding the glass fiber cloth wound on the paper tube on a stainless steel densely-distributed hole shaft special for sintering through a special rewinding machine;

(2) transferring the pre-sintered glass fiber cloth in the step (1) to a special sintered steel bracket;

(3) pushing the arranged pre-sintered steel bracket into a special sintering furnace cavity, and aligning shaft holes at two ends of a stainless steel densely-distributed hole shaft with hot air circulation holes in the furnace cavity;

(4) adjusting the wind speed of a circulating wind motor of the sintering furnace, setting the sintering temperature of the sintering furnace to be 380-;

(5) when the temperature in the furnace chamber is cooled to be lower than 80 ℃, the special sintering steel frame is removed;

(6) moving the completely cooled glass fiber cloth to a special frame of a silica gel coating machine;

(7) guiding the completely cooled glass fiber cloth out of the oven by using a traction cloth, and adding silica gel into a front silica gel trough and a rear silica gel trough;

(8) stopping the machine to adjust the distance between the two scrapers, wherein the distance between the first group of scrapers is 0.55 mm according to the coating thickness, the distance between the two scrapers is 0.6 mm, the distance between the second group of scrapers is 0.7 mm, and the distance between the two scrapers is 0.8 mm, and restarting the machine to coat silica gel;

(9) and (3) when the fabric is dried to a semi-cured state, namely hand feeling is not sticky, processing the fabric into a shape and a size which are set by a customer, performing secondary high-temperature vulcanization and removing residues to ensure that the fabric meets the European standard of FDA, FRGB American standard.

After adopting the structure, the invention has the following beneficial effects: according to the production process of the food-grade silica gel glass fiber reinforced baking pad, the warp and weft are prevented from displacing by carrying out high-temperature sintering and shaping treatment on the glass fiber cloth, so that the warp and weft are prevented from deforming when a scraper scrapes glue, and the purpose of coating high-viscosity silica gel is achieved; no diluent is used for coating high-viscosity silica gel, so that potential safety hazards in production are eliminated, and flammable and explosive materials do not exist; no harmful substance is discharged, no pollution is caused to air, and the production is more environment-friendly; the cost is greatly reduced, and the diluent is not volatilized only for reducing the viscosity of the silica gel; adding two guide rollers and a group of scrapers into the coating equipment, connecting for two times, scraping glue for two times, and coating a thicker silica gel baking pad for one time; the food sanitation and safety of the product are improved, the FDA, FRGB American standard and European standard are better met, and the product is not yellowed after long-term use.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments; all other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. And, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

A production process of a food-grade silica gel glass fiber reinforced baking pad comprises the following steps:

(1) rewinding the glass fiber cloth wound on the paper tube on a stainless steel densely-distributed hole shaft special for sintering through a special rewinding machine;

(2) transferring the pre-sintered glass fiber cloth in the step (1) to a special sintered steel bracket;

(3) pushing the arranged pre-sintered steel bracket into a special sintering furnace cavity, and aligning shaft holes at two ends of a stainless steel densely-distributed hole shaft with hot air circulation holes in the furnace cavity;

(4) adjusting the wind speed of a circulating wind motor of a sintering furnace, wherein the diameter of a glass fiber cloth roll is 400 mm, the sintering temperature is 380 ℃, the sintering time is 29 hours, and the frequency of a fan is 39 Hz;

(5) when the temperature in the furnace chamber is cooled to be lower than 80 ℃, the special sintering steel frame is removed;

(6) moving the completely cooled glass fiber cloth to a special frame of a silica gel coating machine, and adjusting a tension controller to 0.8A (40N/M);

(7) and (3) leading the completely cooled glass fiber cloth out of the oven by using a traction cloth, and adding silica gel into a front silica gel trough and a rear silica gel trough: penetrating the glass fiber mesh traction cloth into a tension frame guide roller, then penetrating into a first gum dipping trough guide roller, then penetrating into a first gum dipping scraper, and entering into a first drying box; then vertically downward passes through a bottom roller and a steering roller of the oven from a top roller of the primary drying box, enters a guide roller of a secondary impregnation tank, passes through a secondary gluing scraper and enters a secondary drying box; then vertically passes through a secondary drying oven bottom roller and a secondary turning roller from a secondary drying oven top roller, and enters a cloth rolling machine for rolling;

(8) adjusting the temperature of a region 1 at the bottom of the oven to be 45 ℃, the temperature of a region 2 to be 58 ℃, the temperature of a region three to be 68 ℃, the temperature of a region four to be 80 ℃ and the temperature of a region five to be 101 ℃ to start heating and starting the machine for pre-coating;

(9) stopping the machine and adjusting the distance between the two scrapers, adjusting the distance between the scrapers to be 0.6 mm according to the coating thickness of 0.55 mm by the first group of the scrapers, adjusting the distance between the scrapers to be 0.8 mm by the second group of the scrapers, restarting the machine to coat silica gel, drying the semi-cured state, namely, not sticking hands, processing the semi-cured state into a shape and a size which is formulated by a customer, performing secondary high-temperature vulcanization and removing residues, and ensuring that the requirements of FDA and FRGB American and European standard are met.

Example 2

A production process of a food-grade silica gel glass fiber reinforced baking pad comprises the following steps:

(1) reversely rolling the glass fiber cloth wound on the paper tube on a stainless steel densely-distributed hole shaft special for sintering through a special rewinding machine, wherein the glass fiber cloth is environment-friendly corn starch type glass fiber cloth;

(2) transferring the pre-sintered glass fiber cloth in the step (1) to a special sintered steel bracket;

(3) pushing the arranged pre-sintered steel bracket into a special sintering furnace cavity, and aligning shaft holes at two ends of a stainless steel densely-distributed hole shaft with hot air circulation holes in the furnace cavity;

(4) adjusting the wind speed of a circulating wind motor of a sintering furnace, wherein the winding diameter of the glass fiber cloth is 500 mm, the sintering temperature is 400 ℃, the sintering time is 30 hours, and the frequency of a fan is 45 Hz;

(5) when the temperature in the furnace chamber is cooled to be lower than 80 ℃, the special sintering steel frame is removed;

(6) moving the completely cooled glass fiber cloth to a special frame of a silica gel coating machine, and adjusting a tension controller to 0.8A (40N/M);

(7) and (3) leading the completely cooled glass fiber cloth out of the oven by using a pulling cloth, and adding high-viscosity body silica gel into a front silica gel trough and a rear silica gel trough: the high-viscosity silica gel comprises silicone oil, white carbon black and a coupling agent;

(8) adjusting the temperature of a region 1 at the bottom of the oven to 50 ℃, the temperature of a region 2 to 60 ℃, the temperature of a region three to 70 ℃, the temperature of a region four to 85 ℃, and the temperature of a region five to 110 ℃ to start heating and start pre-coating glue when starting up;

(9) shut down and adjust two scraper distances, first group scraper is according to coating thickness 0.55 millimeter, it is 0.6 millimeter to adjust the scraper distance, second group 0.7 millimeter, it is 0.8 millimeter to adjust the scraper distance, start-up coated silica gel again, dry the semi-solid state and feel promptly not sticky hand, polish the bottom surface of the fine cloth of glass and handle, cut out and bordure this roast pad at last, process into and make secondary high temperature vulcanization and remove the residue after the customer formulates the shape and size, ensure to accord with FDA, FRGB American standard European standard requirement.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.