Vertical Disc Injection Molding Machine The working principle of the disc Vertical Injection Molding Machine is to use the thrust of the screw (or plunger) to inject the plastic in the molten state (i.e. viscous flow state) after plasticization into the closed cavity, and then get the product after solidification. Vertical Disc Injection Molding Machine,Second Hand Vertical Injection Moulding Machine,Vertical Plastic Injection Moulding Machine,Vertical Injection Machine Ningbo Chenwei Machinery Technology Co.,Ltd , https://www.chenweimachinery.com
There are three forms of environmental impact assessment:
1. If it is likely to cause significant environmental impact, an environmental impact report shall be prepared and a comprehensive evaluation of the environmental impacts shall be made.
2. If there is a slight environmental impact, an environmental impact report form shall be prepared, and an analysis or special evaluation shall be made on the environmental impact.
3. If the environmental impact is small, the environmental impact registration form should be reported.
The environmental impact report of the construction project shall include the general situation of the construction project, the current situation of the surrounding environment of the construction project, the analysis and prediction and assessment of the impact of the construction project on the environment; the environmental protection measures of the construction project and its technical and economic argumentation, and the environmental impact of the construction project Economic profit and loss analysis; recommendations for environmental monitoring of construction projects; conclusions of environmental impact assessment.
For construction projects involving soil and water conservation, there must also be a soil and water conservation plan approved by the water and soil administrative department.
(II) Management requirements for environmental impact assessment of construction projects 1. Evaluation agencies and their requirements (1) The institutions that conduct environmental impact assessments shall pass the examination and examination of the environmental protection administrative department of the State Council and have certain qualification certificates.
(2) The evaluation agency shall engage in environmental impact assessment services in accordance with its qualification level and evaluation scope; the evaluation agency shall be responsible for its evaluation conclusions.
(3) The institution that provides technical services for the environmental impact assessment of the project shall not have any interest relationship with the environmental protection administrative department or other relevant examination and approval department responsible for approving the environmental impact assessment document of the construction project.
(4) The environmental impact report or environmental impact report form of the project shall be prepared by an institution with corresponding qualifications, and the evaluation agency shall not be designated by the person.
2. Approval management of construction environmental impact assessment documents (1) The environmental impact assessment documents of construction projects shall be submitted to the environmental protection administrative department for approval by the construction unit; if the construction project has the competent department of the industry, the environmental impact report documents shall be subject to the competent department of the industry. After the pre-trial, report to the environmental protection administrative department for approval.
(2) After the environmental impact assessment document of the construction project is approved, if the nature, scale, location, production process used, or measures to prevent pollution and prevent ecological damage are significantly changed, the construction unit shall re-compile and report the construction project. Environmental impact assessment document.
(3) If the environmental impact assessment document of the construction project exceeds 5 years from the date of approval, and the party decides to start construction of the project, its environmental impact assessment document shall be reported to the original examination and approval department for re-audit.
(4) If the environmental impact assessment document of a construction project has not been approved after review or review, the project approval department may not approve its construction, and the construction unit shall not start construction.
3. Post-evaluation and management requirements for environmental impacts (1) In the case of a project that does not comply with the approved environmental impact assessment documents during project construction and operation, the construction unit shall organize post-evaluation of environmental impacts, adopt improvement measures, and report The original environmental impact assessment document examination and approval department and the construction project examination and approval department shall file the record; the original environmental impact assessment document examination and approval department may also instruct the construction unit to conduct post-evaluation of environmental impact and adopt improvement measures.
(2) The administrative department of environmental protection shall conduct follow-up inspections on the environmental impacts of the construction projects after they are put into production or use. If serious environmental pollution or ecological damage is caused, the reasons shall be ascertained and the responsibility shall be ascertained. Where an organization that provides technical services for the environmental impact assessment of a construction project prepares a false environmental impact assessment document, or the staff of the examination and approval department dereliction of duty or dereliction of duty, and approves the environmental impact assessment document of the construction project that should not be approved according to law, Investigate their legal responsibilities.
Injection molding is a cycle process, each cycle mainly includes quantitative feeding, melt plasticity, pressure injection, mold filling cooling and mold opening. Take out the plastic part, and then close the mold for the next cycle.
Generally speaking, the molding process of the screw disk injection vertical Injection Molding Machine is as follows: first, add granular or powdered plastic into the cylinder, melt the plastic through the rotation of the screw and the heating of the outer wall of the cylinder, then close the mold, move the injection seat forward, make the nozzle close to the pouring port of the mold, and then inject pressure oil into the injection cylinder to push the screw forward, so that the high pressure can inject the melt into the closed mold with a relatively low temperature at a faster speed. After a certain period of time and pressure maintaining (also called pressure maintaining) cooling, solidify it into shape, and then open the mold to take out the product (the purpose of pressure maintaining is to prevent the melt from flowing in the mold cavity in reverse, supplement the mold cavity material, and ensure that the product has a certain density and dimensional tolerance). The basic requirements of injection molding are plasticization, injection molding and molding.
Environmental impact assessment of mining projects
(1) Environmental impact assessment form Environmental impact assessment refers to the analysis, prediction and evaluation of possible environmental impacts after the implementation of planning and construction projects, and the countermeasures and measures to prevent or mitigate adverse environmental impacts, and methods for tracking and monitoring. The system is the work that the law must complete before the project is planned and constructed.