Stages of making a casket:
- The main types of products
- Necessary equipment
- Materials for making papier-mâché
- Winding and gluing blanks of the body
- Pressure testing and drying
- Workpiece boiling
- Filing
- Hardware fittings
- Casket decarning
The longest process in the manufacture of the product is the boiling of blanks. Cardboard, even highly compressed, remains cardboard. It will become a new material when its fibers are “spliced” with a shriveled oil film. To do this, pre-dried workpieces must be boiled in oil.
The tank is filled with linseed oil so that the preform could drown in it, but no more than three quarters of the volume of the tank. 2-3% of kerosene is added to drying oil to enhance the impregnation of especially dense walls.
Billets are dipped in boiling drying oil. Cook for 10-15 minutes, until the bubbles stop flowing from them, i.e. until all pores are filled. We take out the cooked products from drying oil by crocheting, letting the excess oil drain. Now wipe dry with a rag and set to dry in an oven at a temperature of 80 ° C until completely dry. Hot drying is carried out for a week, followed by drying in air. Billets will be dry when, during sanding, the material crumbles rather than bristles (spreads out). Absolute drying occurs in a month or two, the polymerization process over the entire thickness of the wall ends, but still the drying speed, of course, depends on the thickness of the product.