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Learn The Specifications From These 15 Faces | Injection Mould Making And Repairing Work Instructions
Jun 25, 2018

The core tips: First, the production of 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. On every template

  First, make the mold number

1. The number of the mould must be machined with a milling machine above the outer end face of the blank (square iron) with a word height of 40mm and a depth of 0.5mm. The font is isoline.

2. The number of the mold must be marked with a code on each template, and the direction is uniform.

3. All the screws, ring holes, and mold parts of the mold must be in metric specifications. The accessories for the processing molds must be of a standard specification and must not be made by ourselves.

Second, die position

1, each set of molds are in the B plate (moving template) on the four corners of the milling die position for FIT mold 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 mold screw hole

1, each set of molds must be in the dynamic floor, fixed mold panel open mold hole.

2, hole spacing size should be determined according to the injection type

V. Top hole

1. The top of the moving mold must have a large enough top hole, diameter Φ2540mm

2, small mold only need to open a top hole, the middle mold must open three top hole above, large-size mold that is required 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, a mold must be provided on the mold and the ejector plate must not be reset by the spring to prevent the spring from failing. The row (pulling core) and thimble cylinder 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 closed after the device is reset.

Eight, thimble plate guide column guide sleeve

1, the length of the thimble plate is 12 or more, or the middle of the mold is in the middle

2, configure more small thimble and diameter below 2mm


3, configure more divisions (10 or more),

4. In the above three situations, four guide posts and guide sleeves must be added on the ejector 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. Use a blue plastic sling for the plastic mold to reset the ends of the slingshot.


3, reset the slingshot can not be compressed more than 40% of the free length of the plastic ejector in the case of effective mold in the thimble panel to do four top out of the limit nail


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


X. 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 thickness of the pull strip is 10mm or more,


3, pull the 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 until the mold is closed.


2. When the top is ejected, the beer cannot be deformed. The top white and stuck phenomenon are quickly ejected and the thimble mark does not affect the appearance quality of the beer.


3, the top should be balanced and very smooth, there can be no tilt plate 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 slider (line position) action should be smooth and smooth, guarantee that the shape will not change, and no dead action, unevenness, looseness, etc. can occur;


2. The large slider sliding surface should be open with an 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;



If the sliding length of slide block is too long, it must be guided on the mold base. Normally, the length of the sliding part should be about 1.5 times of the width. When the core is pulled, the matching part of the slider in the guide groove should have a slider sliding part. The 2/3 tube is in the guide chute;


6. The clearance between the inclined guide post hole and the inclined guide post must be more than 0.2mm, which prohibits the same large match;


7. The angle of the inclination guide column is less than 2 degrees from the clamping surface of the row position. The clamping block of the large slider must extend into the lower mold 15-20mm to interlock the back pressure with a 10 degree slope.



The cavity of the round surface slider combination, the angle between the longitudinal direction and the clamping surface of the ramming slider, and the angle of the inclination column are respectively different by 2 degrees, and the same degree is prohibited. The final positioning of the slider above the mold must be pushed or pulled by the slingshot. Can not use wave beads, so as to avoid the slider hitting the clamping block and the inclined guide column in the mold clamping.


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 of large molds are made with hanging screw holes, or both sides are required.


1. A multi-chamber part of a model must be played on the non-exposed surface and the matching surface to show the difference between CAV NO. Before the first tryout.

2. It is advisable to place the CAV NO.

Fifteen, channel shape

1. In principle, O-shaped (circular) channels are 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;



There are many shapes and sizes of railroad crossings, usually flat, flat, point-poured, submersible, and 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 evenly distributed when opening the crossing. The farther away from the main road, the more the mouth of the channel gradually increases. In principle, the navel should be kept in the slanting position of the crossing of the water in order to avoid the increase of the auxiliary manual workload after the glue is separated from the outlet.