The principle behind thermoforming products is quite simple in theory. Heat a sheet of Polystyrene (HIPs), Polypropylene or similar plastic sheet or film and by process of vacuum and air pressure, pull the sheet down over a solid mould to obtain the desired shape. Anything from a car dashboard to a key fob can be vacformed this way. The majority of thermoforming production is by Roll Fed machines. Sheet Fed machines are used for the smaller volume applications, and larger products. Hips roll work is our second largest product, and the majority of customers who purchase it, use the rolls for thermoforming. The plastic sheet is softened at the heating station. It then indexes to the forming station where the mould tools are located. The forming of the sheet is by a combination of air pressure and male core plugs. Certain designs of thermoforming tool facilitate the cropping of the article being formed within the thermoforming tool.
The high volumes of articles being produced demand that a parts stacker is integrated into the forming machine for some tasks. Once stacked the finished articles are then packed into boxes for transportation to the end customer. The separated skeletal waste is either wound onto a mandrill, for subsequent granulating, or passes through a granulating machine which is in line with the thermoforming machine. This means that all skeletal waste can be recycled, and re-used for hips recycled sheet and rolls.
Please contact us today on 01254 88662 if you require any additional information.