Device for detecting and sampling urea-formaldehyde resin in porcelain-imitating tableware

Abstract

The invention discloses a device for detecting and sampling the urea-formaldehyde resin in a porcelain-imitating tableware. The device comprises a driving part, a grinding part, a gas injection part and a rotating pipe with a through hole, the grinding part comprises an upper plate and an outer conical grinding cover with a small end facing downwards, and the small end of the outer conical grinding cover is sealed. The upper end of the outer conical grinding cover is fixedly and hermetically connected with the side surface of the upper plate, an air outlet hole communicated with an inner cavity of the outer conical grinding cover is formed on the upper plate, and a plurality of grooves are formed at the outer side of the outer conical grinding cover. The upper plate is connected with the lower end of the rotating pipe, and the through hole of the rotating pipe is communicated with the inner cavity of the outer conical grinding cover. The gas injection part comprises a rotating connector, a guide pipe and a gas pump, and the rotating connector is installed at the upper end of the rotating pipe and is connected with the gas pump through the guide pipe. According to the device for detecting and sampling the urea-formaldehyde resin in the porcelain-imitating tableware, the temperature of the grinding part and the temperature at the sampling position of the porcelain-imitating tableware are reduced through the flowing air, the urea-formaldehyde resin is prevented from being hydrolyzed when meeting heat, and the detection precision of the urea-formaldehyde resin is improved.

Description

technical field [0001] The invention relates to the technical field of detection equipment for imitation porcelain tableware, in particular to a detection and sampling device for urea-formaldehyde resin in imitation porcelain tableware. Background technique [0002] Imitation porcelain tableware, also known as melamine tableware, is widely used in the catering field because of its exquisite printing and unbreakable properties. Imitation porcelain tableware is made of melamine resin cured by pressure and heating; urea-formaldehyde resin and melamine resin are chemically The properties are similar. The cost of urea-formaldehyde resin is lower than that of melamine resin. If urea-formaldehyde resin is used as raw material to make imitation porcelain tableware, but urea-formaldehyde resin is easy to release formaldehyde when heated, which will affect the health of users. Porcelain tableware is easy to detect. [0003] However, in order to avoid detection, some manufacturers spr...

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Problems solved by technology

[0002] Imitation porcelain tableware, also known as melamine tableware, is widely used in the catering field because of its exquisite printing and unbreakable properties. Imitation porcelain tableware is made of melamine resin cured by pressure and heating; urea-formaldehyde resin and melamine resin are chemically The properties are similar. The cost of urea-formaldehyde resin is lower than that of melamine resin. If urea-formaldehyde resin is used as raw material to make imitation porcelain tableware, but urea-formaldehyde resin is easy to release formaldehyde when heated, which will affect the health of users. Porcelain tableware is easy to detect

[0003] However, in order to avoid detection, some manufacturers spray melamine powder on the urea-formaldehyde resin substrate to form a melamine layer on the surface of the tableware. The melamine coating of this kind of melamine tableware will fall off or crack after being used for a period of time, and the urea-formaldehyde resin will be damaged when heated. Formaldehyde release from substrates

[0004] When the market supervision and law enforcement department conducts law enforcement supervision, it is necessary to send the sampled melamine tableware to a special testing agency, which has high testing costs and a long testing cycle; Friction generates heat. Since urea-formaldehyde resin has low temperature resistance, water resistance and weather resistance, it will be hydrolyzed when encountering strong acid and alkali or at a temperature above 80°C, and formaldehyde and urine ammonia will be released, causing the urea-formaldehyde resin at the grinding place to be heated. Formaldehyde is decomposed, and the detection of urea-formaldehyde resin mainly uses formaldehyde as the detection object. Grinding and sampling will affect the detection accuracy

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