HOT-PLATE PLASTIC WELDING MACHINE

HOT-PLATE PLASTIC WELDING MACHINE

MODEL :- DK400H

POWER SUPPLY :- 415V 3 phase, Earth, A.C./50Hz with 1% tolerance, Stabilized /30A.

Power consumption :- estimated 20A peak

AIR PRUSSURE - 7 Kg /sq.cm , constant ,dry & free from dust particles 6-8 Kg

Important factors –

1. The welding results and consistency largely depends on quality of parts to weld like Warpage control, Dimensions and injection molding quality.

2. Melting temperature for heater plate expected 270-300ºC ± 10%. Please let us have your material data on this.

3. Machine Operation Sequence

• Operator Puts Machine ON to achieve Temperature set –Make ON Vacuum.

• Operator put an assembled plastic part into upper and lower fixture.

• Activate lower part support bracket holding.

• Operator press start button–—parts held in fixtures/jig.

• Auto cycle starts if temperature achieved – Both Fixture/jigs close together to match and get apart (this can by pass) in auto cycle ---Heater Plate comes forward—Upper jig (descent)and lower jigs (ascent) with parts moves toward hot plate – Gets pressed against heater plate – heating time – Material soften time --- Fixtures get apart to some distance --- Heater plate moves backward – Both Fixtures close together to join parts – Hold time (cooling time) – Time end – Vacuum for upper part released – Both jigs goes to Origin – Welded part remain in lower jig – Operator open bracket holding and un load part from lower fixture – cycle complete– New parts loaded by operator.

• Cycle program can be changed by suggestions, the one mentioned is better practice.

• Suggestions in features of machine will be considered . certain specification of

machine may change to suit to weld part of different height.

4. Cycle Time sequence estimate

• Machine Set ON - 25 min. to achieve temp. (first time )

• Operator put parts into fixture and press start button (8-10S)

• Heater plate comes forward and jigs close to it (3S)

• Melting + soak time Expected (depends on weld rib design) (8S)

• Jigs apart and Heater plate moves backward (3S)

• Holding time for cooling, Includes jig close in (20-30S)

• Both jigs retract back part remains in lower jig (2S)

• Operator unload part (3S)

• Cycle time depends on weld parameters, speed set, Weld line Dimensions so may vary and can set up on trials.

• Estimate Cycle time : 45-57S

• Based on above – Production per hour – 50 pcs.max.

• Based on above – Production for 8 hrs run – 400pcs max.

5. Important Overview

 Safety Sensor Curtain Safety - Yes

 Upper Part Vacuum /hold arrangement - Yes

 Lower Part Vacuum/hold arrangement - Yes

 Separate digital Temperature PID x 2 - Yes

 Production counter (weld cycle) - Yes

 Tool Interchangeability - Yes (manual -12-15 min.

except cooling and heating time)

 PLC operation - Yes

 Parameters Set on HMI - Yes

 Compressed Air required - 0.7-0.8 Mpa/8bar constant, dust particle free.

 Start by Two distant Push Switch - Yes

 Emergency Push stop Switch - Yes

 Pressure regulator and Display - Yes

 Machine with Shoes and Castors - Yes

 Two tube Lights in work area - Yes

 4 Guide pillar Linear bearing support for precise Jig, Fixture tool movement –

- Yes.

 Block Linear bearing drive for heater mold movement with end to end cushion to reduce impact, shock absorber cushion. - Yes

 Part presence sensor (not required) - No

 Pressure banker tank built in machine - Yes