Relevant regulations on occupational health and environmental protection in construction work sites

1. The main internal kiln of general regulations
(1) Requirements for the construction environment
1. The construction site must be closed enclosure, the height should not be less than 1. 8mo The construction area of ​​the construction site should be clearly divided with the office and living areas, and there should be isolation measures.
2. The site selection of temporary housing at the construction site is reasonable and meets the requirements of safety and fire protection.
3. The construction organization design should have effective measures to prevent the atmosphere, water and soil, noise pollution and improve environmental sanitation; the construction enterprise should take effective occupational disease prevention measures to provide the necessary protective equipment for the operators, and to engage in occupational disease hazards. Personnel should be regularly examined and trained.
(2) Health work requirements
1. The construction enterprises should be prepared to worker health food, cold, heatstroke, anti-coal gas poisoning, epidemic prevention work.
2. The construction enterprise shall formulate an emergency plan for public health emergencies on the construction site.
Second, the main points of environmental protection work
(1) Dustproof
1. The earthwork at the construction site should take measures to prevent dust. The earthwork at the construction site should be piled up in a centralized manner, and the main roads must be hardened.
2. When removing the building (structure), measures such as isolation and watering should be used, and the waste should be cleaned regularly. It is strictly forbidden to burn all kinds of waste at the construction site
3. The cement and other easy-to-fly fine-grained building materials at the construction site should be stored in a closed manner or covered; the concrete mixing place should be closed and dust-removed.
(2) Preventing water and soil pollution
1. The construction sewage should be drained and sedimented by the site, and after the sedimentation, it can be discharged into the sewage pipe network or river.
2. Items such as oil and chemical solvents for construction should be stored in a warehouse specially set up on site. Discarded oil and chemical solvents should be disposed of in a centralized manner and should not be dumped at will.
(3) Prevention and control of construction noise pollution
1. The construction site shall formulate noise reduction measures in accordance with national standards. Strong noise construction equipment should be placed on the side away from the residential area and there are measures to reduce noise.
2. It is necessary to carry out the construction exceeding the noise standard at night, and the construction unit will submit the approval to the relevant department before the construction.
(4) Environmental sanitation
1. The building materials used in the temporary facilities at the construction site shall meet the requirements for environmental protection and fire protection.
2. Dormitories on the construction site should ensure the necessary living space, sanitation facilities and living conditions. The canteen must have a health permit, and the person in charge must take a health certificate to work.
3. When a statutory infectious disease, food poisoning or acute occupational poisoning occurs on the construction site, it must be reported to the relevant department at the site within 2 hours. The infectious disease should be promptly taken into isolation measures, etc., and disposed of by the health and epidemic prevention department.

Bakelite Injection Molding Machine

Bakelite, also known as bakelite, also known as phenolic molding, is a thermosetting plastic with high impact toughness, stable quality, corrosion resistance, heat resistance and low temperature. Generally speaking, the process of Dewei forging bakelite Injection Molding Machine brand is divided into the following processes. You can have a look together to better understand the knowledge of bakelite injection molding.

1. Bakelite mold heating

Unlike Plastic Mold, bakelite mold can be produced after being put on the machine. It takes a long time to heat up bakelite mold.

2. Temperature rise of bakelite injection molding material

The customized material of bakelite injection molding machine is generally powder. Under the friction formed by the barrel heating device and the screw, the thermosetting plastic in the barrel is melted by heat to achieve the effect of pre-setting plastic material.

3. Injection molding of bakelite products

After the completion of pre-molding, the mold closes, the screw rod starts to inject, and the molten material is pushed by the screw from the barrel nozzle through the main channel, the diversion channel and the gate of the mold into the mold core, and the mold core is fully filled. Because the melted material is cut and heated during injection molding and the mold is at high temperature, the temperature of the melted material rises rapidly into a fast response situation. The injection time of bakelite products is different from that of plastic products, and the injection time of bakelite products is relatively long.

4. Dry and solid under pressure

After injection, it will enter the pressure maintaining state immediately. The effect of pressure maintaining has two aspects: one is shrinkage, and the other is to ensure that the product structure produced by the bakelite injection molding machine manufacturer can be close and firm. After the completion of pressure maintaining, it will be delayed for a period of time, waiting for the material to be completely dry and solid, and then the product will be finalized.

5. Ejection of bakelite products

Open the mold to eject the finished product, clean the mold, and wait for the next the first mock examination product to go out.

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