How to Hang / Load TOSHIBA All-electric Injection Molding Machine Work Procedure 1. Mechanical unit (1) Check the foundation surface for unevenness. (2) Remove the top cover from the safety gate. This cover is removed at a time of shipment from the factory. (It is not attached to EC230SXⅡ) (3) Set eyebolts or lifting jig on the prescribed positions of the machine. Apply wires installation jig onto the eyebolts or lifting jig. (4) EC30SXⅡ～EC180SXⅡ：Apply wires onto wires installation jig to unload the truck. EC230SXⅡ：Apply wires onto wires installation jig and projection to unload the truck. Refer to section 3-2 about machine weight. Refer to section 3-3 when moving the machine by a forklift. (5) Do not make a step on the oiling piping unit, when slinging work wire ropes. (6) Use universal rollers to locate the machine at the prescribed position. (7) Use a crane or jack to lift the machine and install leveling pads. (8) Fit the supplied top cover on safety gate. (It is not attached to EC230SXⅡ) (9) Place a level measuring instrument on the leveling surface
Read more →Details of the Process for Injection Molding Machines The earliest injection moulding machines were of the plunger type and there are still many of these machines in use today. A pre-determined quantity of moulding material drops from the feed hopper into the barrel. The plunger then conveys the material along the barrel where it is heated by the conduction from the external heaters. The material is then plasticised under pressure so that it may be forced through the nozzle into the mould cavity. In order to split up the mass of the material in the barrel and improve the heat transfer, a torpedo is fitted in the barrel . But there are few disadvantages in this type of machine i.e. it is difficult to produce consistent mouldings. The main problems are: 1. There is little mixing or homogenization of the molten plastic. 2. It is difficult to meter accurately the shot size. Since metering is on a volume basis, any variation in the density of the material will alter the shot weight. 3. Since the plunger is compressing material which
Read more →Injection molding Processing of Plastic One of the most common processing methods for plastics is injection moulding. Nowadays wide range of articles are made by means of injection molding. These include such things as electric drill casing, television housings, gearwheels etc. The original injection moulding machines are based on the pressure die casting techniques for casting metals. The first machine is reported to have been patented in the United States in 1872, specifically for use with celluloid. this was an important invention but probably before its time because in the following years very few developments in injection moulding processes were reported and it was not until the 1920s, in Germany, that a renewed interest was taken in the process. The first German machines were very simple pieces of equipment and relied totally on manual operation. In the late 1930s the next major development in injection molding , i.e. the introduction of the hydraulically operated machines get available. However, these machines still tended to be hybrids based on the die casting technology and the design of injection moulding machines for plastic
Read more →Extrusion Processing of Plastic One of the most common methods of processing plastics is Extrusion using a screw inside the barrel. The plastic, usually in the form of granules or powder, is fed from the hopper on to the screw. It is then conveyed along the barrel where it is heated by conduction from the barrel heaters and shear due to its movement along the length of the screw flights. The depth of the screw channel is reduced along the length of the screw so as to compact the material. At the end of the extruder the melt passes through a die to produce an extrudate of the desired shape.
Read more →Processing Introduction of Plastic One of the most outstanding features of the plastics is the ease with which theycan be processed. In some cases semi-finished articles such as sheets or rods are produced and subsequent fabricated into shape using conventional methods such as welding or machining. In the majority of the cases, however, the finished article, which may be quite complex in shape, is produced in a single operation.The processing stages of heating, shaping and cooling may be continuous (e.g. production of pipe by extrusion), or a repeated cycle of events (e.g. production of telephone housing by injection moulding), but in most cases the processes may be automated and so are particularly suitable for mass production. There is wide range of processing methods which may be used for plastics. In most cases the choice of method is based on the shape of the component and whether it is thermoplastic or thermosetting. There are two principal methods for processing plastics. 1. Extrusion Processing of Plastic 2. Injection molding Processing of Plastic
Read more →Safety Precautions for the Use of Hoses of Toshiba Injection Molding Machines * For auxiliary equipment (e.g. Hydraulic core puller, Hydraulic valve gate) (1) Do not touch or look into any hose or metal fitting during pressurization. If a hose or metal fitting is broken, it may cause injuries such as burns, and in addition it may cause the fluid to soak into the skin and damage biomedical tissue. If it is imperative for operators to touch products while working, mount a protective cover made of a strong enough resin on that section in order to provide a clearance. (2) Do not damage hoses. If the external layer of a hose is damaged and its reinforced layer is exposed (external damage), the reinforced layer is damaged (e.g., corrosion) by moisture soaking in through the damaged area, and the hose will burst at an early stage of its life. If external damage is detected on a hose, replace it with a new one. (3) Do not twist or pull hoses. If a hose is pressurized while it is twisted or pulled,
Read more →Precautions for the Electric System of Toshiba Injection Molding Machines (1) Electric construction for auxiliary equipment Do not feed power source to any auxiliary equipment from the secondary circuit of main breaker in the electric cabinet of the injection molding machine. Feeding source from electric circuit of the machine will be the cause of a fire and machine malfunctions. (2) Grounding the machine and control cabinet Ensure that the machine frame and control cabinet is grounded and that connections are not corroded. Regularly exercise extreme care to avoid short-circuiting. (3) Maintenance, inspection, and connector removing Be sure to turn off the power before maintenance or inspection of electric circuit or removing the connectors. Failure to comply can cause a serious accident resulting in injury or death. (4) Inspection for heater wiring Ensure that the heater wiring is not loose and that bare wires are not exposed. Be sure to turn off the power and measure voltage at inspection points to ensure that the power is off before inspection. Insulate the heater wire connections with heat-resistant tape. Polyvinyl tape should not
Read more →Precautions for Clamping of Toshiba Injection Molding Machines (1) Safety gate damage Damages to the transparent panel of the safety gate require immediate repair. Never remove molded products from a hole. Be sure to open the safety gate before taking out molded products. (2) During machine operation, never put your hands into the injection molding machine or around a safety gate. Never touch moving parts of the injection molding machine. (3) Do not operate the machine with safety gates, safety guards, or safety devices left removed. (4) Securely turn off the power and check that the ejector is located at the retract limit and core at the out limit before starting work on the mold. (5) Inspection for safety devices Check that safety devices function securely at starting of work or changing of workers. (6) Inspection for mold mounting bolts Check the mold mounting bolts. If the mold is not properly secured, the mold may slide or fall during the injection molding process. Extreme caution should be exercised especially during NOZZLE CONTINUOUS ADVANCE. Secure proper bolt size, number and threaded
Read more →Emergency Stop Button of Toshiba Injection Molding Machines One-piece each of emergency stop button is equipped on the operation and non-operation sides of the machine to stop the machine in an emergency. Pressing the emergency stop button turns off the servo motor and the machine. NOTE: Prior to restarting the machine after pressing the emergency stop button, turn the emergency stop button clockwise to unlock it. Press [MAN] or [SET-UP] of the OPERATION selector button on the machine controller. Then press [ON] of the PREPARATION button to restart.
Read more →Alarm Code List and Error Resetting Procedures of Toshiba Injection Molding Machines Take the proper countermeasures shown in the list below if an alarm code is displayed in the TCXMAIN module of the INJECTVISOR-S51(S50)/V50. Please notify Toshiba Machine of the alarm code and occurrence condition, if the error is not reset even after taking the countermeasures shown below. Feel Free to Contact Us if Any Questions
Read more →Mechanical Safety Device of Toshiba Injection Molding Machines The safety device is designed to secure the safety mechanically by interrupting mold closing with the opening of the safety gate. If the mechanical safety device functions as a result of mold closing with the opening of the safety gate, immediately contact your nearest service station to call service personnel for inspection on electrical devices. Opening the safety gate on the operation side rolls the guide roller and the hook that synchronizes with guide roller turns toward the link housing and fits into the groove provided on the shaft to prevent mold platen closing. Closing the safety gate on the operation side makes the guide roller return the position and the hook that synchronizes with guide roller turns away from the link housing out of the groove provided on the shaft to enable mold platen closing. NOTE: This safety mechanism does not function during mold platen opening.
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