Glassfiber reinforced PU foam composited crosstie line

Continuous production of high intensity glassfiber reinforced polyurethane foam composited crosstie.

1.1 Description

This production line is with a design of high pressure resistant full steel box structure, mainly used for continuous production of high intensity glassfiber reinforced polyurethane foam composited crosstie. The working principle is: glassfiber yarn and demoulding paper on upper and lower facing layer were contiuously unwinding conveyed, the polyurethane foaming combination materials were distributed directly on the glassfiber after metering and mixing,     forming into the composited panel by heat-setting at laminator, then get the finalized products through on line cutting machine. The weight scale of glassfiber and polyurethane combinated materials contained in the panel is 1:1, and the apparent density of the panel is 640~840kg/cm3, in which, the compressive strength of the laminator used for foaming section is 10Mpa. The production line that describle in this technique agreement mainly includes two section of continuous unwinding of glassfiber and foaming, molding.

1.2 Parameters

No.	Item	Requirement of parameters
1	Total length of equipment	70~80 m
2	Creel no.	1344
3	The flow rate of the pouring machine	3-8 kg/ min(adjustable)
4	Valid working length of laminator	18m
5	Valid working width of laminator	340 mm
6	Valid working height of laminator	70~100 mm
7	Temperature control range of laminator	Normal temperature~80°C(adjustable)
8	Designed production speed	0.2 -1m/min(adjustable)

1.3 Molding size

Glassfiber reinforced polyurethane foam composited panel:

Length: 1000-4000 mm

Width:  200~340 mm

Height:  70~100 mm

1.4 Dimension Accuracy requirements of formed products

Thickness tolerance:	±1mm
Width tolerance:	±2mm
Length tolerance:	±2mm
Length tolerance of products diagonal:	±2mm
Height tolerance:	±1mm

The products appearance are basically smooth and the cutting section are basically neat.

2 Equipment components, function and configuration

This continuous production line are mainly used for the production of glassfiber reinforced polyurethane foam goods. The glassfiber yarn and demoulding paper on upper and lower facing layer were contiuously unwinding conveyed, the polyurethane foaming combination materials were distributed directly on the glassfiber and enter circulating rolling mold after metering and mixing, then eject after heating, foaming, solidification, sizing, curing process and get the finalized products through the conveyer system, cooling sytem and on line cutting machine.

The production line mainly include yarn discharge system, yarn collecting and deliver system,PU

foaming material feeding system,mold release paper unwinding system, full steel box structure

double-belt laminator system, later conveyer and cuting system, etc.