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Changshu smoothly for plastic products factory talk about plastic extrusion die debugging nine steps
by：CSSSLD
2021-01-23
The stand or fall of plastic injection mould and plastic extrusion mold equipment debugging ready or not, in order to guarantee the quality of plastic extrusion die, in the plastic injection mould are serious debugging before the start of the production, the operator must be familiar with their operation by the extruder, to correctly grasp the characteristics of the screw, the control of heating and cooling, the instrument characteristics, the control of the tractor, the structure of the mold and assembly, etc. , in order to correctly grasp the extrusion processing conditions, the right to operate the machine.
Changshu well below da plastic products factory talk about the plastic injection mould debugging nine steps!
step one, should check whether the temperature control is sensitive, before starting the instrument failure, the cooling water was clear and so on. Usually the methods of thermometer, flux of cooling water for testing.
step 2, according to the extrusion machine operation procedures of extruder screw, barrel and die head heating, when the temperature reaches the set temperature, heat preservation, shall, 10 minutes or so to boot, making machine parts temperature to stabilize.
step three, before starting the die sections must be connecting screws and bolts strike. In the material before being squeezed out, the operator shall not stand in front of the mouth mould, in order to prevent the bolt or screw fracture caused injury accident.
step four, started out, the screw rotation speed appropriate USES slow, and then gradually speed up, in order to prevent overload and attaint parts when it is started.
step 5, boot, the first to add a small amount of material, and keep the loading balance, pay close attention to the torque when feeding and table values for material from die extrusion die head mouth and traction equipment, after holding to gradually increase SAP until normal extrusion.
step 6 and started pulling, stock mould and die head should have a certain distance for traction. Open the water ( Notice may not be water poured into the die head, otherwise it will cause the die discharging disorder caused by cutting or die snarl-up) , shape complicated cavity smaller and more than a mold cavity profile should be open stock mould plate; After the plasticizing normal extrusion materials, through has set up a good traction rope to pull the materials lead to the machine. Shorten the finalize the design units and the distance between the die head, cover plate, start the vacuum pump, to basic balance, extrusion speed and traction observing will finalize the design again after the profile to normal machine and die head distance to the ideal value.
step 7, if discover the parison in stock mould inlet end deformed or tendon adhesion to profile lumen surface, pointed tool available in stock mould first entry point type billet deformed parts or inner rib poke a few holes, well versed in the small cavity and atmosphere and parison into stock mould is open, easy to form the negative pressure, prompting parison tightly attached to finalize the design mode of mold wall.
step eight, in case of blocking mode ( Not closed) Circumstances, should immediately will finalize the machine backwards or improve the drawing speed, or implementation of the above two kinds of schemes at the same time, and then through the adjustment to restore the normal production process. If already closed when implementing the above plan is invalid, should be immediately back to finalize the design, and along the stock mould tackles material, close to finalize the design mode of moisture, reduce the traction speed, will slowly pull material from stock mould. If there are some material in stock mould broken, need to open it to finalize the design mode, and would scrap a thorough clean.
step 9, when stop generally need to add to the machine downtime is the production of material extrusion line, then stop and strike the die head is removed for mold processing.
step one, should check whether the temperature control is sensitive, before starting the instrument failure, the cooling water was clear and so on. Usually the methods of thermometer, flux of cooling water for testing.
step 2, according to the extrusion machine operation procedures of extruder screw, barrel and die head heating, when the temperature reaches the set temperature, heat preservation, shall, 10 minutes or so to boot, making machine parts temperature to stabilize.
step three, before starting the die sections must be connecting screws and bolts strike. In the material before being squeezed out, the operator shall not stand in front of the mouth mould, in order to prevent the bolt or screw fracture caused injury accident.
step four, started out, the screw rotation speed appropriate USES slow, and then gradually speed up, in order to prevent overload and attaint parts when it is started.
step 5, boot, the first to add a small amount of material, and keep the loading balance, pay close attention to the torque when feeding and table values for material from die extrusion die head mouth and traction equipment, after holding to gradually increase SAP until normal extrusion.
step 6 and started pulling, stock mould and die head should have a certain distance for traction. Open the water ( Notice may not be water poured into the die head, otherwise it will cause the die discharging disorder caused by cutting or die snarl-up) , shape complicated cavity smaller and more than a mold cavity profile should be open stock mould plate; After the plasticizing normal extrusion materials, through has set up a good traction rope to pull the materials lead to the machine. Shorten the finalize the design units and the distance between the die head, cover plate, start the vacuum pump, to basic balance, extrusion speed and traction observing will finalize the design again after the profile to normal machine and die head distance to the ideal value.
step 7, if discover the parison in stock mould inlet end deformed or tendon adhesion to profile lumen surface, pointed tool available in stock mould first entry point type billet deformed parts or inner rib poke a few holes, well versed in the small cavity and atmosphere and parison into stock mould is open, easy to form the negative pressure, prompting parison tightly attached to finalize the design mode of mold wall.
step eight, in case of blocking mode ( Not closed) Circumstances, should immediately will finalize the machine backwards or improve the drawing speed, or implementation of the above two kinds of schemes at the same time, and then through the adjustment to restore the normal production process. If already closed when implementing the above plan is invalid, should be immediately back to finalize the design, and along the stock mould tackles material, close to finalize the design mode of moisture, reduce the traction speed, will slowly pull material from stock mould. If there are some material in stock mould broken, need to open it to finalize the design mode, and would scrap a thorough clean.
step 9, when stop generally need to add to the machine downtime is the production of material extrusion line, then stop and strike the die head is removed for mold processing.
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