Pin Point Gate Plastic Injection Molding

Used mainly for thin walled products with a frequency-lawyer-an injection of at least 3-4 times per minute, or a maximum cycle time 15-20 seconds a mold cavity with pin point gate. Material which is the injection into the cavity directly derived from the nozzle G, where the drop in temperature as well as barriers pengalirannya very small, so the size of the gate can be made small. Table 3.1 above can be used as guidance in determining the diameter of the gate d. -injection material in the cavity before reaching the runners will pass through the channel C first. The longer the runner channel, the temperature of the material tip of the flow would be decreased, so it will be difficult to pass through the narrow gate. Pouch runner dimasudkan D material to trap and hold the channel tip, so the material that will go through the gate, pretty good. Regarding the size of the gate, but is determined by the weight of products such as Table 3.1 above, is also affected by the condition and the condition of the bend cross-section and length of the runner. As a measure of onset, can be taken from table 3.1 size plus 20%. After ditrial if showing signs of too little gate as described in advance, gate be enlarged as necessary