Process description 

1 Hopper & loader
 Weighing raw materials of LDPE, Talc M/B, Color pigment and etc by
 required formulation.  And feeding into extruder.

2 Main control panel
 Heating 4 zones, cooling 3 zones and dies 1 zone.  Total 8 control zones.
 It controls connected gas pump, M-1, and hopper loader.

3 AC motor control panel
 It controls  AC motor which is easier to control the speed and good for energy saving
 than other kinds of motor.

4 Main extruder
 Raw materials will be input into main extruder through hopper
 and will be mixed inside.
 At first point of main extruder, all materials will be mixed and melted.
 At second point, materials will be foamed by gas.

5 Gas injection pump
 Gas will be injected into middle point of main extruder for using as
 foaming gas.
 The pump inject liquified butane gas into cylinder after changes into high
 pressured in 80~200kgf/cm2.

6 Dies head & sub-dies
 Foamed materials will be coming out of main extruder through dies set
 to be foamed hose product.
 Approximately 30% gas in hose product cell will be replaced into air.
 Sub-dies will control required size and shape.
 Easy to change dies depending on hose size.
 Dies are made by special heat treatment on surface to protect.

7 Hose air cooling
 Fan blower will make cooling air for foamed hose product.
 Cooling air make foamed product fine cell structure and minimize product shrinkage.

8 Water cooling
 Second cooling by water spray for foamed hose product.
 Enough cooling for hose product to remove all heat.

9 Hose cutting unit
 Semi-auto cutting unit to cut the foamed hose product by required size.
 Easy control to change the required length.

10 Conveyor part
 Guiding conveyor after cutting.

11 Aging
 In order to eliminate the gas contained in the cell structure, foamed product
 will be put in proper temperature for a few days depending on weather temperature.

12 Recycling
 Scrap of foamed hose product and rejected products should be collected
 into recycling machine and will be re-produced into pelletized PE resin.
 These re-produced resin feed back into first stage of raw materials to re-use.

13 Talc Master Batch (Nuclear Active agent)
 Pelletized type mixing resin, Talc powder, whitening agent and others.
 If put more, foamed product got small cell structure, dense and smooth surface.
 If excess of Talc, too many change and product size will be changed.
 If shortage of Talc, too big cell structure and low quality.

14 M-1 (Surface Active agent)
 Lubrication inside cylinder and reduce the pressure.
 Non-shrinkage for product.

15 Butane gas
 foaming agent for product and cooling too.
 Too many gas, too bigger cell structure and low quality product.
 Shortage gas input, good product but too heavy product.