Metal Insert Mold

Metal Insert Molding
Choosing suitable material and molding conditions, not only for products
that are easily deformed and damaged (such as glass, coils, electrical
parts, etc.), can also be sealed and fixed by material. Choosing a suitable
mold structure, the insert product can also be inserted into the plastic
material. With the combination of the vertical metal insert plastic
injection molding machine, manipulator, and insert part aligning device,
most of the insert molding engineering can realize automatic production.
After the insert is molded, it can also be made into parts with hollow
grooves after core hole processing.

Notes Need Attention When Making Metal Insert Part
1. In order to improve the connection firmness of the metal insert and the
plastic part, the insert and the plastic part are tightly combined, and the
surface of the insert should be knurled or processed with grooves to
increase friction force, the insert is not easy to pull out and rotate.

2. The connecting part of the plastic part and the insert should have a
suitable thickness to improve the connection strength of the two connecting
parts, the selection of the thickness value should be determined according
to the properties of the plastic and the shape of the insert, or refer to
the empirical value in the table below.

3. The threaded fixing part of the insert and the mold should adopt the
H9/f9 threaded fit to avoid melt plastic from entering the non-plastic end
of the insert, if not connected with threaded, the H8/h7 sliding fit should
be adopted; the insert can be made convex, this can not only block the
melted plastic but also increase the stability of the insert and the mold.

4. The parts inserted into the plastic part should be inverted into a
circular arc shape to prevent stress concentration in the plastic parts.

5. The length of the insert embedded in the plastic part diameter should not
be bigger than 2 times.

6. In order to avoid the insert from damaging the mold cavity, it should be
noted that the height of the insert is slightly smaller than the height of
the molding cavity of the plastic part, and the difference is about 0.05mm.

7. In order to prevent the metal insert from being pulled out, a ring groove
can be placed in the middle of the insert.

8. For externally threaded inserts, a non-threaded area should be provided
to prevent molten material from penetrating into the mold.

Now the price of products made with injection moulding is affordable, if you
have needs, please contact us.

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