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The Secret Of Injection Mold Life Is Very Long Here
Jun 05, 2018

First, make mold number


    1 must be in the mold outside the end face (square iron) with a milling machine processing mold number, word height 40mm, depth 0.5mm, font is isoline body.


    2. Each template must be marked with a code number, and the direction of uniform.


    3. All screws, ring holes, and mold parts of the mold must be in metric specifications, while accessories for pay-processing molds must be of a standard specification and must not be self-made.


    Second, die position


    1, each set of molds in the B plate (moving template) on the four corners of the milling die position, in order to FIT die and repair mold.


    Third, the code mold pit


    1. Non-I-shaped die need to mill the die groove in the front and back molds, and the specific size depends on the die design dimensions.


    Four, code die screw hole


    1, each set of molds must be in the moving bottom plate, fixed mold panel open mold holes.


    2, the hole size must be determined according to the injection model


    Fifth, the top hole


    1, the bottom of the moving mold must be opened with a large enough top hole, diameter Φ25 ~ 40mm


    2, small mold only need to open a top hole, medium mold must open three top hole above, large-size mold needs to open five holes.


    3, the top hole diameter and position according to the actual size of the injection molding machine (design size)


    Six, positioning ring


    1, each set of mold must be equipped with a positioning ring (ie, positioning flange) for mold positioning,


    2. The size of the positioning ring should be determined according to the wall size of the injection molding machine wall plate.


    3. The diameter tolerance of the positioning ring is 0.2-0.4mm, and the height of the protruding mold panel is 8-10mm.


    4, the standard size of the positioning ring (flange) of the mold and the board is 100mm-0.20^-0.40mm,


    Seven, first reset the device


    1. When the thimble cylinder interferes with the row ejector, it must be equipped with a first-come-first-serve device. The spring must not be used to reset the ejector plate so as to avoid future spring failures. The line position (pulling core) and the ejector tube Collisions.


    2. The stroke switch must be installed between the ejector plate and the moving plate to ensure that the device can be powered and clamped after the device is reset.


    Eight, thimble plate guide column guide sleeve


    1, thimble plate length of 12 or more, or eccentric middle


    2, configuration more small thimble and diameter below 2mm


    3, configuration more Division tube (10 or more),


    4. In the above three cases, four guide posts and guide sleeves must be added on the thimble plate to ensure that the ejector pin balances out the plastic parts smoothly.


    Nine, thimble plate spring bow


    1, all molds must be installed on the thimble plate to install four reset slings to help the thimble uniform retraction,


    2, using a blue mold for plastic mold, reset the slingshot ends,


    3, reset the slingshot can not be compressed more than 40% of the free length to be done in the thimble panel on the thimble panel to make four top out of the limit nail


    4, reset the sling fixed, must be fixed at both ends of the counterbore, banned one end of the sink hole grinding flat surface of the unreliable practice.


    Ten, automatic dehydration device


    1. The thin nozzle die (three-plate die) must be equipped with pull rods, pull bars or return pins to ensure that the nozzle plate and the A plate move to the nozzle automatically.


    2, the material thickness of the pull strip is 10mm or more,


    3, pull rod screw diameter can not be less than 8-14mm,


    4, using the B board (moving template) surface is equipped with 4 nylon nails (Nylon pull machine), the effect of safe, reliable, economical and practical.


    Eleventh, thimble motion


    1. It shall be ensured that the beer pieces are reliably ejected on any occasion and that it is not reset by interfering with other mold parts before the mold is closed.


    2, when the top out of the beer can not be deformed, top white and stuck quickly out and the phenomenon of thimble does not affect the appearance of beer quality.


    3, the top should be balanced and very smooth, there can be no thimble plate tilt phenomenon, the top should not produce noise


    4. After the ejection is completed, the ejector pin should be automatically retracted (except for special molds).


    Twelve, line action


    1. The slide (row position) movement should be smooth and smooth, ensuring that the shaped parts do not change, and no dead action, unevenness, looseness, etc. can occur;


    2. Large slider sliding surface must have oil groove;


    3, large slider must have cooling waterways;


    4. HVE6 should be used for the slider and the slider part, and it should not be too loose;


    5, slider slide stroke length is too long, you must increase the guide on the mold seat, usually the length of the sliding part is about 1.5 times the width of the appropriate, when the core pull the slider in the guide groove with the part, there must be a slider The sliding part of the 2/3 tube in the guide chute;


    6, with the guide pillar hole and the inclined guide column must stay more than 0.2mm clearance, prohibiting the same as the large;


    7. The angle of the inclination guide column is less than 2 degrees of the tightening surface of the row position. The clamping block of the large slider must be inserted into the lower mold 15-20mm to interlock against the 10 degree slope.


    8. The cavity of the round face slider combination, the angle of the longitudinal direction and the tightening surface of the sliding block, and the angle of the inclination column are respectively different by 2 degrees, and the same degree of inhibition is prohibited. The final positioning of the slider above the mold must be pushed or pulled by the slingshot. In the form of beads can not be used, in order to avoid the slider in the mold hit the tight block and the inclined guide column.


    9. All wearable surfaces must be equipped with wear plates with a length of ≥ 30mm and a width of ≥ 50mm. The fine row and row pressure plates need to be quenched and hardened by more than 52 degrees, and the big row bits are nitrided or hardened according to the requirements before the mold opening.


    Thirteen, hanging mold hole


    1. Smaller molds A and B are made with hanging screw holes on the board;


    2. All molds for large molds are made with hanging screw holes, or both.


    XIV. CAVNO.:


    1, a multi-cavity model must be in the non-exposed face, with the surface playing CAVNO. In order to show the difference, in the first try to die.


2. It is advisable to place the word “CAVNO.” after contacting the design engineer.


    Fifteen, channel shape


    1. In principle, an O-shaped (circular) channel is used;


    2. The trapezoidal channel is used in special circumstances;


    3, the size of the cross section of the channel mouth is usually based on the size of the product, the inner cavity of the mold is determined by the number of sides, and the specific size is determined according to the mold design drawing;


    4. There are many shapes and sizes of channel mouths, usually flat, flat, point-poured, submersible, three-four-pronged point-pour type, the specific material crossing size is positive and negative with the actual product size, and the flow should be distributed when opening the crossing. Evenly, the farther away from the main road is, the farther the mouth is, the larger the mouth is, and the point of pouring is to keep the navel in principle. The mouth of the navel should generally be flush with the water to open the slope of the crossing so as not to increase the auxiliary manual workload after the glue is separated from the nozzle.