Inspection Method of Belt Tension in Injection Molding Machines Check by Tension Meter Follow the procedure below to check the belt tension of respective units (clamp unit, ejection device, injection drive unit, charge drive unit). 1) See [Appendix] and input span length, belt width and unit mass of the belt to a belt tension meter. 2) Give a light shock to the checkpoint of the belt by using a hammer. 3) Set a tension meter close to the vibrating belt to measure its tension. 4) Belt tension can be judged to be proper if the belt tension is within the target setting range. Check by Press Force Follow the procedure below to check belt tension of respective units (clamp unit, ejectiondevice, injection drive unit, charge drive unit). 1) See [Appendix] and check amount of deflection and press force of the belt. 2) Check actual press force when pushing the check point of the belt until the belt gets the amount of deflection on the list. 3) Belt tension can be judged to be proper if the press force is within
Read more →How to Check the Belt Tension of All-electric Injection Molding Machine Belt Tension Checking Point on Clamp Unit of All-electric Injection Molding Machine Belt Tension Checking Point on Ejection device of All-electric Injection Molding Machine Belt Tension Checking Point in injection drive unit of All-electric Injection Molding Machine Belt Tension Checking Point in charge drive unit of All-electric Injection Molding Machine By TOSHIBA MACHINE CO.,LTD.
Read more →How to Check Nozzle Alignment on Injection Molding Machines Check the nozzle center when changing the mold. In the case of a mold without locating ring especially, securely check the nozzle center. Misalignment of the nozzle center may cause resin leakage or mold damage. Follow the procedure below to adjust nozzle alignment. 1) After mold mounting, continuously press [ADVANCE] of the NOZZLE button to touch the nozzle tip to the mold for nozzle misalignment check. (At this time insert a piece of paper between the nozzle tip and mold to ease misalignment direction.) 2) Press [RETRACT] of the NOZZLE button to move the nozzle to the retract limit. If the nozzle center shifts vertically, loosen the clamp bolt fixing the injection unit to the base and use adjust bolt to adjust the height of the injection unit and secure vertical alignment. 3) If the nozzle center further shifts horizontally, use the horizontal adjust bolt equipped on the operation to adjust the horizontal positioning of the injection unit. 4) After adjusting tighten the clamp bolt. * Refer to the instruction manual
Read more →How To Replace Heater Fuse in Injection Molding Machines Since a triode AC switch (semiconductor) is used for the solid-state relay in the heater control circuit, a fuse for semiconductor protection (instantaneously melting fuse) is used to prevent overcurrent. The fuse, when required, must always be replaced with the same type and rating of the fuse. Note that a normal fuse cannot protect the solid-state relay. Even if an instantaneously melting fuse is used, repeated fuse blowing due to short-circuits, etc. will deteriorate the semiconductor, possibly causing damage to the solid-state relay. Therefore, short-circuiting should be minimized. There are instantaneously melting fuses in the Injection box of non-operation side. By TOSHIBA MACHINE CO.,LTD.
Read more →How To Replace the Barrel in Injection Molding Machine Replace the barrel by following the procedure below. 1) Swivel the injection unit. 2) Withdraw the screw by referring to the previous section. 3) Remove heater cover, thermocouples, and heater cables. 4) Remove the barrel set bolts with the barrel suspended by wires hooked on the eye bolts. 5) Draw the barrel forward and remove it while suspending. 6) Tighten clamp bolts After replacing screw and barrel, return injection unit and base to machine-center. Refer to the instruction manual “Appendix”, to tighten clamp bolts with proper torque. The clamp bolt tighten with excessive torque causes offset of nozzle-center. By TOSHIBA MACHINE CO.,LTD. Feel Free to Contact Us if Any Questions
Read more →How To Replace the Screw in Injection Molding Machine Replace the screw by following the procedure below. 1) Swivel the injection unit by referring to the previous section. 2) Dismount the injection cover to remove the split collar connecting the screw and S shaft. (Unscrew socket head bolts to remove the split collar.) When reassembling, tighten the bolts at the specified clamp torque. Refer to [Appendix] separately provided. 3) Removing the nozzle Use the attached to remove the nozzle. A gentle blow to the spanner can easily loosen the nozzle.The nozzle is right-hand threaded. NOTES: a. Remove or install the nozzle while hot. After cooled, scuffing or thread may be encountered. Recommendation temperature is from the actual barrel setting temperature to 250℃. b. When mounting the nozzle, thoroughly clean the threads and sealing part, and apply metal lubricant (LUBE-EKS P9, OMEGA 99 or equivalent) in advance. c. Lightly tighten threads first. After nozzle and barrel temperatures rise to the same level, tighten them completely. 4) Turn on the power of the machine and press MOLD SET-UP of the OPERATION button.
Read more →Swiveling the Injection Unit in Injection Molding Machines Follow the procedure below to swivel the injection unit. 1) Continuously press [RETRACT] of the NOZZLE button to retract the injection unit to the retract limit. 2) Press [SERVO] of the PREPARATION button to turn off the motor before turning the power off. 3) Remove two pieces of clamp bolts fixing the injection unit and base. When reassembling, tighten the bolts at the specified clamp torque. Refer to [Appendix ] separately provided. 4) Check that no one exists around before swiveling the injection unit. i4～i8 over have ratchet drive mechanism.（ i3 below are without ratchet.） NOTE: If swiveling is heavy, apply grease on the swiveling face. NOTE: After returning the injection unit, follow the procedure of [6.1, Nozzle Alignment Check] to adjust the nozzle. By TOSHIBA MACHINE CO.,LTD.
Read more →3 / 6 Month and One-year Maintenance Checklist for Injection Molding Machines 3 Months Maintenance Checklist for Injection Molding Machines Timing belt (For inspection method, refer to section 6.2 Timing Belt Inspection) a. Check that the timing belt is not loose. b. Check that the belt and pulley have no wearing or damage. 6 Months Maintenance Checklist for Injection Molding Machines 1. In consideration of service lives of screw tip assembly, packing, and electric equipments (heater, timers), make preparation for replacement. The guarantee period for these equipments is six (6) months. 2. Inspect fans inside the control cabinet for rotating normally. And inspect fans for existence of abnormal noise or insulation status. DANGER: Securely turn off the power and measure voltage at inspection points to check power off before inspection. 3. Lubrication One Year Maintenance Checklist for Injection Molding Machines Inspect the inside bearing in operation of the clamp unit, ejection device, mold thickness setter, injection unit, nozzle touch drive unit for existence of abnormal noise or for wearing on bushing and sliding face of slide ways. Feel Free to
Read more →Inspection Prior to Operation of Toshiba Injection Molding Machines Check the following items daily before the operation to regularly operate the machine efficiently and for safety. 1. Safety device 1). Safety gate on the operation side. (Check the electrical safety device ) a. Open the movable platen to the open limit. b. Close the movable platen until the hook of the mechanical safety device meets the crest on the rod. c. Press [MAN] of the OPERATION selector button and open the safety gate by 30 mm [1.18 in] or more. d. Press [CLOSE] and [OPEN] of the MOLD buttons. (Check that the movable platen does not close or open.) 2). Mechanical safety device a. Open the movable platen until the hook of the mechanical safety device meets the groove on the rod. b. Open the safety gate on the operation side sufficiently. (Check that the hook of safety device fits into the groove on the rod.) 3). Purge shield (Check the electrical safety device.) a. Press [MAN] of the OPERATION selector button and open the safety gate by 30 mm
Read more →Prohibited Operations on Toshiba Injection Molding Machines Daily inspection and maintenance are essential to make the injection molding machine operate at its designed potential and to maximize its service life. However, the following operations regarding maintenance and modification of the machine should not be attempted by the user. Please observe these restrictions. 1. Clamp Unit 1) Disassembly and repair of ball screw 2) Replacement of timing belt and pulley 3) Removing and setting of gears on mold thickness setter 2. Injection Unit 1) Disassembly and repair of load cell 2) Disassembly and repair of ball screw 3) Replacement of timing belt and pulley 3. Electric Components 1) Disassembly and repair of servomotor 2) Disassembly and repair of geared motor 3) Disassembly and repair of PC board 4) Modification and addition of electric circuit 4. Frame 1) Welding and drilling onto the frame
Read more →Monthly Maintenance Checklist for Injection Molding Machines Feel Free to Contact Us if Any Questions
Read more →Daily Inspection of Injection Molding Machines The operator should check the following items every day in machine operation.
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