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A detection and sampling equipment for urea-formaldehyde resin in melamine tableware

A technology of urea-formaldehyde resin and sampling equipment, which is applied in sampling devices, lighting and heating equipment, household appliances, etc. Detection accuracy and other issues, to avoid thermal hydrolysis, increase the contact area, and improve the detection accuracy.

Active Publication Date: 2022-02-22
SHANDONG INST FOR PROD QUALITY INSPECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A detection and sampling equipment for urea-formaldehyde resin in melamine tableware
  • A detection and sampling equipment for urea-formaldehyde resin in melamine tableware
  • A detection and sampling equipment for urea-formaldehyde resin in melamine tableware

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Embodiment 1

[0037] Example 1: Please refer to figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 , the present embodiment discloses a detection and sampling device for urea-formaldehyde resin in melamine tableware, including a driving part, a grinding part, an air injection part and a rotating tube 14 with perforations along the length direction.

[0038] The grinding part of this embodiment includes an upper plate 21 and an outer conical grinding cover 19 with the small end facing downwards. The large end of the outer conical grinding cover 19 is open and the small end is sealed. The side of the plate 21 is fixed and sealed, and the upper plate 21 is provided with an air outlet 18 connected to the inner cavity of the outer conical grinding cover 19, and a number of grooves 12 are provided on the outer side of the outer conical grinding cover 19, and the grooves 12 are not perpendicular to the axis , the upper plate 21 is connected to the lower end of the rotating tube 14, and...

Embodiment 2

[0054] Embodiment two: if image 3 with Figure 4 As shown, this embodiment discloses a detection and sampling device for urea-formaldehyde resin in melamine tableware. Downward inner conical cover 8, the inner conical cover 8 is positioned in the outer conical grinding cover 19, the upper end of the inner conical cover 8 is fixedly connected with the lower side of the upper plate 21, the inner chamber of the inner conical cover 8 and the rotating The perforations of the tube 14 communicate.

[0055] Further, the helical blade 20 is located between the inner conical cover 8 and the outer conical grinding cover 19, the helical blade 20, the inner conical cover 8 and the outer conical grinding cover 19 form a spiral passage, the lower end of the helical passage and the inner cone The inner cavity of the shape cover 8 communicates, and the upper end of the spiral channel communicates with the outside world through the air outlet 18.

[0056] The working process and principle o...

Embodiment 3

[0058] Embodiment three: as figure 2 As shown, this embodiment discloses a detection and sampling device for urea-formaldehyde resin in melamine tableware. , the motor 23 and the power supply 11, the motor 23 is fixed on the housing 1, and the first gear 9 is installed on the output shaft of the motor 23, the second gear 13 adapted to the first gear 9 is installed on the rotating tube 14, the motor The input end of 23 and the input end of the air pump 15 are both electrically connected to the output end of the control switch group 2, and the input end of the control switch group 2 is electrically connected to the output end of the power supply 11.

[0059] Preferably, both the first gear 9 and the second gear 13 are bevel gears or both the first gear 9 and the second gear 13 are spur gears.

[0060] The control switch group 2 is provided with control buttons corresponding to the motor 23 and the air pump 15 respectively, and the control switch group 2 controls the working st...

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Abstract

The invention discloses a detection and sampling device for urea-formaldehyde resin in melamine tableware, which includes a driving part, a grinding part, an air injection part and a rotating tube with perforations, and the grinding part includes an upper plate and an outer cone with the small end facing downwards. Grinding cover, the small end of the outer conical grinding cover is sealed, the upper end of the outer conical grinding cover is fixed and sealed with the side of the upper plate, and the upper plate is provided with an air outlet connected to the inner cavity of the outer conical grinding cover. There are several grooves on the outside of the grinding cover, the upper plate is connected to the lower end of the rotating tube, and the perforation of the rotating tube communicates with the inner cavity of the outer tapered grinding cover. The gas injection part includes a rotary joint, a conduit and an air pump. On the upper end of the rotating tube, and the rotary joint and the air pump are connected through a conduit; the urea-formaldehyde resin detection and sampling equipment in the melamine tableware reduces the temperature of the grinding parts and the sampling position of the melamine tableware through the flowing air, and avoids the thermal hydrolysis of the urea-formaldehyde resin , Improve the detection accuracy of urea-formaldehyde resin.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/04F25D1/00
CPCG01N1/04F25D1/00
Inventor 沈荣静高兴凯焦毅刘东方
Owner SHANDONG INST FOR PROD QUALITY INSPECTION
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