How to Shut Down a Injection Molding Machine Correctly By TOSHIBA MACHINE CO.,LTD. Shut down the machine by following the procedure below. NOTE: The shutdown procedure may vary depending on the specification of the molding machine. [1] Press [MOLD SET-UP] of the OPERATION selector button. [2] Press [CLOSE] of the MOLD button to close the mold. [3] Press [INJ] of the SCREW button continuously and purge all resin in the barrel until screw advance limit. NOTES: In case of using thermal unstable resin, the resin inside the barrel should be exchanged with thermal stable resin. [4] Press [SERVO] of the PREPARATION button to turn off the servomotor. [5] Press [BARREL] of the HEATER button on the operational controller to turn off the barrel heater. [6] Turn off the main breaker of the machine. ※Turn off the main breaker (NFB) on the injection side of the control cabinet.
Read more →How to Stop the AUTOMATIC Operation on injection Molding Machine By TOSHIBA MACHINE CO.,LTD. Stop the AUTOMATIC operation by following the procedure below. [1] Press [SEMI-AUTO] of the OPERATION selector button. [2] After the completion of one cycle operation, the machine stops at the mold opening limit and at the ejector advance limit. Then press [SET-UP] of the OPERATION button. [3] Press [RETRACT] of the EJECT button until the LED lights. [4] Press [RETRACT] of the NOZZLE button to retract the nozzle tip from the mold.
Read more →AUTOMATIC Running Operation on Injection Molding Machine By TOSHIBA MACHINE CO.,LTD. AUTOMATIC operation carries out continuous operation from mold closing to product ejection. (The following descriptions are given on condition that resin has been supplied and barrel heating up has been completed before starting operation.) Use the operation controller to operate the machine by following the procedure below. [1] Press [AUTO] of the OPERATION selector button. [2] Confirm whether there is no residual substance in the mold. [3] Press the [CYCLE] push button. The machine starts one cycle operation automatically. NOTES: Machines with 1200mm or larger distance between tie rods require safety gate open/close movement before pushing [CYCLE] push button. Feel Free to Contact Us if Any Questions
Read more →SEMI-AUTOMATIC Operation on Injection Molding Machine By TOSHIBA MACHINE CO.,LTD. SEMI-AUTOMATIC operation carries out one cycle operation automatically from mold closing to product ejection. (The following descriptions are given on condition that resin has been supplied and barrel heating up has been completed before starting operation.) Use the operation controller to operate the machine by following the procedure below. [1] Press [SEMI-AUTO] of the OPERATION selector button. [2] Confirm whether there is no residual substance in the mold. [3] Press the [CYCLE] push button. The machine starts one cycle operation automatically. NOTES: Machines with 1200mm or larger distance between tie rods require safety gate open/close movement before pushing [CYCLE] push button. [4] Open the safety gate and take out products from the mold. Or confirm whether there is no residual substance in the mold. NOTES: 1) If there is no pushing [CYCLE] push button after the completion of one cycle operation and after TR4 time-out, warning buzzer sounds within a few seconds. 2) To continue the SEMI-AUTOMATIC Operation, repeat [3] and [4] procedure. 3) The machine can’t start SEMI-AUTOMATIC operation
Read more →Clamping System Rating of Injection Molding Machine – By Zafar Kamal The clamping system for the injection-molding machines have nominal ratings in tons of clamp force that can be exerted. Although machines are built to certain standards to provide a given force, individual units can vary somewhat from their design ratings. A large opposing force will be required to keep the mold closed and thus produce acceptable molded parts. As the part depth becomes greater and as the wall thickness becomes less, the opposing clamp force will become greater. Although the injection pressure in a given system may be in the range of 15000 to 20000 psi. Pressure drops in the cylinder, through the nozzle, and into the mold cause a loss in the total available pressure and consequently, the effective pressure within the cavity on the material may be only 25 to 50 percent of the original starting pressure. With screw-type plasticators injection pressures are reduced primarily because of the greater degree of homogenization of the melt.
Read more →Fixed Stationary Platen and Movable Platen introduction in Injection Molding Machine – By Zafar Kamal The platens of a molding press are heavy steel plates to which the halves of the mold are attached. In most machine operations, one platen is rigidly mounted and is correspondingly called the stationary platen(fixed platen/first platen). The other (movable platen/second platen) is mounted so that it can be moved as the clamp mechanism is opened and closed. The molds are attached to these plates either by direct bolting or through the use of clamps which are attached to the plates in a series of carefully spaced, drilled and tapped holes. This method provides a great degree of versatility to any given size machine. The stationary platen(fixed platen/first platen) must provide an entry for the nozzle of the plasticizing chamber. A register ring or location device is provided in this plate to properly align the mold with the nozzle. The movable platen must incorporate a device for actuating the part ejection system, most commonly by means of some mechanical knockout bar
Read more →Locations of Safety Devices and Plates of Toshiba Injection Molding Machines This machine is provided with electrical safety devices, mechanical safety devices, emergency stop buttons, and the purge shield. In addition the machine is attached with DANGER, WARNING, and CAUTION plates. Observe the precautions noted on these plates.
Read more →Manual Operation on TOSHIBA Injection Molding Machines By TOSHIBA MACHINE CO.,LTD. Curry out Mold Closing, Nozzle Touch, Injection, Charging, Mold Opening and Ejection in MANUAL mode. (The following descriptions are given on condition that resin has been supplied and barrel heating up has been completed before starting operation.) Use the operation controller to operate the machine by following the procedure below. [1] Press [MAN] of the OPERATION selector button. [2] Close the safety gate and continuously press [CLOSE] of the MOLD button to close the mold until the LED lights. [3] Continuously press [ADVANCE] of the NOZZLE button to touch the nozzle tip to the mold until the LED lights. [4] Press [INJ] of the SCREW button to fill resin into the mold cavity until the LED lights. [5] Press [CHARGE] of the SCREW button to charge the resin into the barrel until the LED lights. [6] Continuously press [OPEN] of the MOLD button to open the mold until the LED lights. [7] Press [ADVANCE] of the EJECT button until the LED lights, to discharge the product out of the
Read more →Manual Charging on TOSHIBA Injection Moulding Machines By TOSHIBA MACHINE CO.,LTD. MANUAL charging is necessary before carrying out the MANUAL operation, SEMI-AUTOMATIC operation and AUTOMATIC operation. (The following descriptions are given on condition that resin has been supplied and barrel heating up has been completed before starting operation.) Screw Rotation Speed(SRN) 20min-1 Back Pressure (BP) 49MPa (Max. setting) * In order to avoid a problem, Back Pressure (BP) here should be high enough for the screw not to retract during its rotation. Use the operation controller to operate the machine by following the procedure below. [1] Press [MAN] of the OPERATION selector button. [2] Close the safety gate. Then press [INJ] of the SCREW button and move the screw to the advance limit. [3] Continuously press [CHARGE] of the SCREW button to start charging. ※The LED blinks during charging. ※After the LED flicker became from slow to fast, charging continues without pressing [CHARGE] button. [4] After confirming melted resin flowing out of the nozzle, increase (SRN) setting and lower (BP) setting. ※The LED lights after the completion of charging.
Read more →Precautions for Injection of Toshiba Injection Molding Machines (1) Purging During purging, such as when starting and changing molding material, perform injection by lowering injection speed and closing the purge shield to prevent decomposed resin from dispersing. During operation, stay away from the nozzle. Resin might emerge from the nozzle due to insufficient drying or deterioration, depending on the material. For your safety, wear proper protective gears when carry out purging. (2) Removing the dripping resin from the nozzle Never remove dripping resin from the nozzle when it is advancing. (3) Approaching the nozzle tip Keep your hands and face away from the nozzle tip during and after barrel temperature rise. Gas pressure can cause melted resin to gush out even when it is not injected. (4) Never touch the nozzle, barrel and barrel heater cover since they have hot surface under high voltage. (5) Turn off the power and measure voltage at the working point to check that power is OFF before servicing electric parts and wiring such as heater or thermocouple. (6) During operation, do not put your
Read more →Other Precautions of Toshiba Injection Molding Machines (1) Securely stop the machine and turn off the power before machine maintenance, adjustment, oil supply, cleaning, or etc. (2) During machine maintenance or repair working, securely place [UNDER REPAIR] tag on the machine. (3) When working with other people for mold set-up, machine maintenance, repair, adjustment, oil supply or cleaning, sufficiently make contacts with such people to mutually know working positions before starting the machine. (4) If a machine cover is removed, reinstall it and securely tighten set bolts. Do not enter inside the machine by removing covers. (5) Keep the machine and its area clean regularly. Place tools or materials in places and order at the work area. (6) Place orders for CAUTION plates as required so that precautions in instruction manuals are thoroughly observed. (6) On the machine attached with magnet clamp equipment (option), powerful magnetism has been generated from the magnet clamp equipment. Magnetism may influence apparatuses such as heart pacemaker or hearing aid. Any person wearing these apparatuses should not approach the machine. (8) Follow basic safety precautions
Read more →Clamping System Introduction in Injection Molding Machine – By Zafar Kamal The function of the clamp of the injection molding machine is twofold. The fixed one is called platen and the other one is movable support the two halves of the injection mold and open and close the mold at the appropriate time in the molding cycle. The clamp unit also takes up the pressure applied to the plastic being injected by the injection unit during the injection part of the molding cycle. To oppose the injection pressure necessary to deliver the highly viscous melt to the mold requires a significant amount of force. Without adequate force, the mold would simply open at its parting line and allow the molten material to escape. The result can be a reject part, or a mess which would require down time for clean up, and even more important, it could result in personal injury to the operator or other person in the vicinity.
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