The PU sandwich panel production line is packaged equipmentfor discontinuous production of sandwich panels. The PU sandwich panelproduction line is used for discontinuously making sandwich panels with thefacing layers of color steel or galvanized sheet and the core material ofpolyurethane.

Whole equipment is divided into PU insulation part andfacing sheet profiling part:

1.PU insulation part :

1.1. Specifications of sandwich panels producible:

1.2. Equipment used
(1).One 2+2 multi-layer laminator for 61.2m panels.
(2).One set of PU foaming machine and installation for pre-storing materials.

1.3. Operating principle

The multi-layered laminator is consisted of the press andthe rail stands. Two worktables are to move into the press and the other twostay on rail stands. Initially, put the top and the bottom facing sheets insideof mould frames and then do the necessary sealing work. After that, feed the worktablesinto the press. When worktables inside the press moves out orderly, the other two feed in at the same time. Upon the finish offeeding, the press will close and slant at a angle,waiting for the injection PU raw materials from the PU mixing head intodifferent panels. Meanwhile materials start foaming and curing. At this time,mould frames on worktables moved out can be opened and the finished productscan be unloaded to get ready for next production cycle.

1.4.Constituents of equipment.

One 2+2 multi-layer laminator for61.2m panels.

The laminator is used to make sandwich panels with the max.length of 6m, max. width of 1.2m and the thicknessfrom 50150mm..

1.Main Technical Parameters of PU Sandwich PanelProduction Line

Constituents of equipment

PU insulation part of PU sandwich panel production line isconsisted of the main machine, hydraulic driving system, worktables, worktablesupporters, worktable-heating system, bridge crane formixing head, antiskid platform and electrical control system.

2.1. Main machine

To be made up of the frame, chassis,slanting mechanism, rails and adjustable beam.

2.2. Hydraulic driving system

The system includes the hydraulic station, 10 oil cylinders(8 for vertical movement and 2 for slanting use), three sets of oil pumps (onefor vertical movement, another for slanting use and the other for sustainingpressure) as well as suitable hi-pressure oil hoses and valves.
Power: 11kw

2.3. Worktable

Size: 6.4m1.4m60mm (LengthWidthThickness)
Worktables are made of extruded aluminum alloy.
Five worktables (one is fixed), auto-feeding mechanismand mould locators are provided.
Power: 0.55kw8

Worktable supporters

Including the supporters and rails. (To be put on the left and right sides of the main machine)

Worktable heating system

It is made up of the medium heating installation, pumpunits, pipes and suitable temperature control. (Two sets, one on the right, theother on the left)
Power: 24kw2

Bridge crane for the mixing head

The crane comprises the frame, two-dimension (in X and Ydirections) mobile trolley and spring balancer in Z direction.

Anti-skid platform

To be put on the sides of left and right worktablesupporters and under the mobile crane for mixing head movement. (Required whileoperating on the worktables)

Electric control system

Adopting central control by a panel, the system is equippedwith fitting press buttons, relays, temperature control instrument, etc..

Hi-pressure PU foaming machine and installation forpre-storing materials

Tank assembly:

Producing tank: Two 300L jacketed tanks with insulationlayer on the outside, maximum allowable pressure 0.4MPa. Each tank is with a0.75kw agitator assembly and the safety valve, pressure-reducing valve,pressure gauge, three-position liquid-level control switch and fitting valvesand pipes.

Preparatory tank: Two 2000L jacketed tanks with insulationlayer on the outside, maximum allowable pressure 0.1MPa. Each tank is with an 1.5kw agitator assembly and the safety valve,pressure-reducing valve, pressure gauge, magnetic liquid-level indicator,fitting valves and pipes as well as the ladder, platform and fence rail.

Two pipe-type heat exchangers withworking area of 1.8m2.
Temperature control system with a 18000kcal. water-chiller, a 12kw heater, 5 sets of digital temperaturecontrol instruments, a water tank, a water pump and hydraulic solenoid valve.

Automatic material-supplementing installation: twomaterial-loading tanks included; material loading done either in an automaticor a manual way.
Material filtration part includes two wire-type filters.

Pump assembly:

Two hi-pressure flowrate-variableplunger pumps: 3000g/s throughput (max) when mixing ratio is 1:1 ; nominalpressure at 25Mpa; motor power being 11kw2, revolution at 1450r/min; withsensors and alarm to limit maximum and minimum pressure.

Flowrate sensor: instantaneous flowrate indication.
An switcher between high pressure and low pressure isequipped.
Two magnetic-driving connectors to prevent materialsdripping.

Hi-pressure mixing head:

One hi-pressure mixing head is equipped, co-jettingpressure adjustable.

Cleaning installation:

One cleaner is fit with one 25L stainless steel tank withthe air-blowing valve, hydraulic cleaning valve, fitting pipes, electromagneticvalve, safety valves, etc.

Hydraulic control system:

One hydraulic station; one gear pump; motor power at 5.5kw;the fitting filter, accumulator, pressure gauge, pipes, valves like overflowingvalve, check valve, direction-changing valve and distributor valve areincluded.

Electrical control:

One control cabinet, on which pressure,temperature, flowrate, alarm and digital display aregiven. One SIMENS Model S7-200 PLC with a 8TAIDA contact screen is equipped.

Facingsheet profiling part

Equipment used

Production process

1. Facing sheet profiling part divides into two lines.

2. One line is for forming outer roof.

3. The other line is for forming inner roof as well as forouter and inner wall.

4. Each line is made up of one decoiler,one film-coverer, one forming machine, one hydraulic clipper and one group ofroller conveyors.

5. Facing sheet after being decoiled and formed is cut into required length by a hyraulic clipper while the forming machine stops running.

Constituents of equipment

Hydraulic decoiler

Hydraulic decoiler in facingsheet profiling part of PU sandwich panel production line is used forunwrapping and hydraulically tensioning color steel with the coil of 508mm ininternal diameter and 1,250mm in width and maximum load of 10T. The decoiler includes a hydraulic loading trolley. Power:4.5kw.

Forming machine (profile drawing attached)

This machine is used to form color-steel facings, havingplate like structure, welded frame and gear-chain transmission.
Specification of color-steel facings for wall panels and internal roof: 1,000mmin width and 0.35~0.8mm in thickness.
Specification of color-steel facings for external roof shall be 1,200mm inwidth and 0.35~0.8mm in thickness.
For forming external roof, the machine shall be with 21 pairs of formingrollers of 75mm in diameter and with the power of 5.5kw, maximum forming speed8m/min variable by changing frequency.
For forming wall panels and internal roof, the machine shall be with 10 pairsof forming rollers of 75mm in diameter and with the power of 4kw, maximumforming speed 8m/min variable by changing frequency.

Cross-cutter

It is employed to hydraulically cut forming color-steelfacings into pre-determined length at request with a guillotine actuated by thehydraulic station of decoiler. PLC controller andlength detector are adopted.

Film-covering installation

This installation is used to cover film to the surfacecolor steel before forming in case of scratch. Size of a PVC film coil: 72~80mm(inner diameter);400mm(outer diameter).

Optional equipment

A. Two lifting and parallel moving installation with vacuumsuckers
Used to unload finished sandwich panels on worktables and also to move facingsheets from their stacking area onto worktables.

Liftingand parallel movement are done with following parameters:

Vacuum system includes the vacuum pump and suckers.
Operations are controllable by PLC programs that can be preset.

B. One flipper

For turning over the profiled wall sheet 180 degrees.
This machine is consisted of a steel base, flipping actuator and flippingframe. Power: 0.75kw.

C. Powered roller conveyor

Two groups of roller conveyors used to convey profiledfacing sheet are equipped.
Length: 28m each group. Power: 2.2kw2.Running speed: 20m/min.

D. In additional to 2+2 multi-layer laminator for61.2m panels, the clients can, according to different usage, order a 2+2laminator for 81.2m panels, or a 2+2 laminator for 81.2m panels, or a2+2 laminator for 121.2m panels, or a 1+2 laminator for 143m panelsor a custom-made one.

E. Forming machine to be supplied in accordance withprofile drawing give by clients.
F. One 2+2 multi-layer laminator for 121.2m panels
The laminator is used to make sandwich panels with themax. length of 12m, max. width of 1.2m and thethickness from 50150mm.

Maintechnical parameters

Constituents of equipment:

It is consisted of the main machine, hydraulic drivingsystem, worktables, worktable supporters, worktable-heating system, bridge crane for mixing head, antiskid platform andelectrical control system.
2.1. Main machine

To be made up of the frame, chassis, rails and adjustablebeam.
2.2. Hydraulic driving system

The system includes the hydraulic station, 16 oil cylindersfor vertical movement, two sets of oil pumps (one for vertical movement, theother for sustaining pressure) as well as suitable hi-pressure oil hoses andvalves.
Power: 15kw

2.3. Worktable

Size: 12.4m1.4m60mm (LengthWidthThickness)
Worktables are made of extruded aluminum alloy.
Five worktables (one is fixed), auto-feeding mechanismand mould locators are provided.
Power: 0.75kw8

2.4 Worktable supporters

Including the supporters and rails. (To be put on the left and right sides of the main machine)

2.5. Worktable heating system

It is made up of the medium heating installation, pumpunits, pipes and suitable temperature control. (Two sets, one on the right, theother on the left)
Power: 24kw2

2.6 Bridge crane for the mixing head
The crane comprises the frame, two-dimension (in X andY directions) mobile trolley and spring balancer in Z direction. (Mechanical movement in X direction.)
Power: 0.55kw

2.7 Anti-skid platform

To be put on the sides of left and right worktablesupporters and under the mobile crane for mixing head movement. (Required whileoperating on the worktables)

2.8 Electric control system

Adopting central control by a panel, the system is equippedwith fitting press buttons, relays, temperature control instrument, etc..

G. Air-jetting low-pressure PU foaming machine andpre-storing installation

Tank assembly:

Producing tank: Two 300L jacketed tanks with insulationlayer on the outside, maximum allowable pressure 0.1MPa. Each tank is with a0.75kw agitator assembly and the safety valve, pressure-reducing valve,pressure gauge, three-position liquid-level control switch and fitting valvesand pipes.

Preparatory tank: Two 2000L jacketed tanks with insulationlayer on the outside, maximum allowable pressure 0.1MPa. Each tank is with an 1.5kw agitator assembly and the safety valve,pressure-reducing valve, pressure gauge, magnetic liquid-level indicator,fitting valves and pipes as well as the ladder, platform and fence rail.

Two pipe-type heat exchangers withworking area of 1.8m2.
Temperature control system with a 18000kcal. water-chiller, a 12kw heater, 5 sets of digital temperaturecontrol instruments.
Automatic material-supplementing installation: two material-loading tanksincluded; material loading done either in an automatic or a manual way.
Material filtration part includes two wire-type filters.

Pump assembly:

Two hi-pressure flow rate-variable plunger pumps: 3000g/sthroughput (max) when mixing ratio is 1:1; motor powerbeing 7.5kw2, revolution at 1450r/min; with sensors and alarm to limit maximumand minimum pressure.

Flow rate sensor: instantaneous flow rate indication.
One air-jetting low-pressure mixing head:
There is one air-jetting mixing head of low pressure. One head cleaner issupplied with one 25L stainless steel tank with the air-blowing valve,hydraulic cleaning valve, fitting pipes, electromagnetic valve, safety valves,etc.

Electrical control:

One control cabinet, on which pressure,temperature, flow rate, alarm and digital display are given.
Contact screen control is equipped.

Kangda Polyurethane Machinery Co., Ltd. is a professional manufacturer and supplier of PU sandwich panel productionline. With 24 years of experience in production, sales and service, theproducts have exported to worldwise, like: the United Arab Emirates, Iran,India, Indonesia, Russia,Brazil, South Africa, Egypt,Sudan, Albania andother countries.

If you need PU sandwich panel production line. and other products, please contact us!