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Plastic Mold Making Specification
May 26, 2018

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Plastic molds manufacturing specifications HTC017

First, confirm the map:

A. Waterway:

1. Male mold & female mold: Determined according to the shape of the finished product, the path and quantity of the water circulation, and the water path of the male mold and the female mold must be coordinated.

2. Stripper plate x 2 cycle.

3. The above-mentioned water hole joint needs to make a counterbore, and the counterbore size is $35*L25mm.

4. The water plug of the mold must be IN, OUT and numbered.

5. A copper water plug is required, A01&A07 is a plastic water plug, and the A09 copper water plug has a size of 1/4” PT.

6. The practice of side sealing plugs, 2PCS stopcock or 1PCS stopcock + copper block.

7. If there is a spray hole, use a copper piece as a separator.

B. Material Ditch: Design the path, shape, size, etc. of the material ditch according to the balance of the finished product feed.

C. Advances: According to the appearance and requirements of the finished product, the type of the point of entry will be determined as pin point, side pin point, side edge, cone shape, etc.

D. Ejection method:

1.PIN top out, need to use DME specification (determined by different customers).

2. When the finished surface of the ejector pin has a shape, it is necessary to do directional positioning.

3. Ejector ring (pay special attention to draft angle of the water ring) or ejector block.

E. Positioning block X 4: 360 degrees/4 of the male and female templates, lengthen the positioning block of the square shape, increase the precision of the reference plane (Material: SKD-61)

F. Mode:

1. Lock male and female mold nuts, the more design the better, and the need to be evenly distributed, so that the contact between the mold and the mold seat more closely,

When locking the screw, it must be locked and the torque must be the same.

2. The male and female molds must have the positioning tip of the card holder.

3. When all inserts have a round shape, they must be positioned and can only be assembled in one direction, avoiding misdirection during assembly.

G.4 column requires 1pcs for eccentricity, X and Y axes are each 10mm.

H. The screw holes and screws of the die must be DME's metric specification.

I. The back pin seal must have a top plate and be made of TDAC+nitriding.

J. If there are slant pins and sliders, wear plates must be added on three sides and oil grooves must be provided (material: TDAC+nitriding).

K, need to install the counter, INSERT type (A09 customer only needs).

L. The length, width, height, positioning ring and KO hole of the mold must be matched with the customer's machine size.

M. If it is a three-plate die, A09 is an external shutter and A is an internal shutter.

N, CHECK between the master and the stripper, the separation distance is sufficient, the manipulator removes the material head, consider the length of the LGP & the machine's

Maximum travel.

O. The indication arrows for the electric discharge machining are required on the mold.

P.Name Plate, Arrow, Clamp, Part No., Date Stamp, Hole Number, Recycle Chapter, Counter..., etc., must be marked on the structure diagram.

Q. Arrows need to be sprayed with yellow paint when the mold is shipped. The lock module must be sprayed with red paint.

R. When the mold needs to be forced to return, it must be forced back to the nameplate under the arrow of the die foot.

S. All slider mechanisms require springs.

T. All BUSH need positioning pins.

U. Must pay attention to the problem of shrinkage, especially the size of the assembly.

V. Layers and lines of the mold structure:

1. Central Line ----------- Pink.

2. Ditch ----------- yellow.

3. Waterways ----------- Light orange.

4. Size line, description text & material table ----------- Basket color.

5. Mold structure:

a. Appearance ---------- Black.

b. Mechanism (slider, offset pin, ram cylinder, etc.) ----------- Water basket color.

c. Parts (screws, shafts, thimble, etc.) ---------- Violet basket color.

6. Finished Products & Hi-Logo Logo ---------- Green.

W. The manufacturer must provide the mold structure drawing and detailed parts drawing.

X. It is necessary to know who made the drawing surface, mold base machining, NC machining, grinding processing, etc.


Second, the mold production process:

A. Preparation:

1. Mold base.

2. Model Ren

3. Electrode copper.

4. Hardware materials.

B. Mechanical processing:

1. Lathes, milling machines, grinders, etc.

2. Wire cutting machine.

3.CNC processing:

a. Male model and mother model kernel.

b. Make the desired electrode according to where the male and female molds need to clear the corners.

c. Oblique pins and sliders.


a. Clearance.

b. EDM in the male and female model PL surface, engraved with the material number, Recycle chapter & date chapter (INSERT).

C. Male and female mold clamping (including clamping pin and slider).

D. The completion of the top & waterway structure (the number of the waterway IN&OUT is required).

E.HH engraving & sky arrow engraving (or EDM on the foot).


Third, be sure to complete the following confirmation before the trial mode:

A. Confirm that the mold completes all mold structures.

B. Confirm that the waterway, the entry point, the gutter, and the top exit are smooth.

C. Confirm the mold, must not have any flash.

D. Test mode program:

1. Note:

a. Molding conditions, mold structure must be the same.

b. Materials must be the same for comparison.

c. Fill in the test condition table.

2. The purpose of the first test

a. Test die structure, waterway, channel & eject action...etc.

b. Whether the finished product feed is average.

c. The finished product should have the net weight it deserves, and it must not have any burrs or shrinkage.

d. The dimensions of the finished product and the finished product are the same.

e. Modify according to the absence of the mold.

3. The purpose of the second trial to the Nth trial mode:

a. Test die structure, waterway, channel & eject action...etc.

b. Review the first tryout and if the resulting deletions improve.

c. Finished products should have a net weight, and should not have any unfavorable conditions such as burrs or shrinkage.

d. Be sure to begin the detailed dimensional inspection, assembly and appearance of the finished product (such as biting flowers or nitriding).

4. The purpose of the last tryout:

a. Test whether the finished product is the standard we require.

b. Check once again if the structure of the mold, waterway, material channel, ejector action, etc. are normal.

c. Shoot 20-30 PCS as the bottom left sample. Repeat the test mode until the items 1, 2 & 3 reach the standard and the final mold structure & injection molding conditions.