All process equipment, including auxiliary equipment , should have safety devices and procedures to operate and meet safety requirements. They should include a checklist that reviews preparation
(moving material, etc.), startup and shutdown procedures, tooling changes, and cleanup. Most equipment generates high temperatures and pressures. They are built to run safely, but they must be treated with respect. With plastics that decompose, there may be hazards such as burns and wounds, air
contamination, and major equipment problems. Faulty controllers and/or freeze-off can cause overheating and heater burnout. In addition, alarms should be installed that alert the plant when problems develop.
In injection molding, plastic materials are melted at high temperatures to a liquid (melt) that is injected into a mold that is clamped shut under forces of many tons. The mold clamp is a powerful device that operates very quickly. Either the hot plastic or the heavy clamp can hurt you badly. It is important for your safety that you treat an injection molding machine with respect.
Injection molding machines must be designed, constructed, and used in a manner to prevent hurt, injury, or loss. They are to comply with the ANSI safety standard; Quite often, an accident is blamed on the carelessness of the injured party, when in fact such carelessness is a predictable human error. The effectiveness of predicting such human error and guarding against it will determine the safety of the
Looking first at the responsibility for machine safety, we find it cannot be delegated to any individual or group. Through the design and manufacturing stage, input is provided by many individuals, each one affecting machine safety:
- Marketing must determine the needs of the industry, providing input to others without
overstating the requirements.
- Research and development must convert these needs into workable ideas without creating unrealistic demands that lead to hazards.
- Design engineering must convert these ideas into workable concepts that guard against predictable human error.
- Detailed design must turn the concepts into reliable components and assemblies.
- Manufacturing and assembly must create and combine these components in a manner than ensures the design concept has been maintained.
- Quality control must ensure that design integrity is intact.Sales must match the needs of users with
the features of the design without misrepresenting the product’s abilities and features.Service must be aware of the machine’s abilities and features to provide needed communication on the Droduct’s use.