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Double Injection Mold

Double Injection Mold

Viewmold have the professional experience for double injection mold for near 20 years,and has 2 double injecton machines. If you need to custom double injection molds,welcome you to contact us by email or submit a quote online.

Double injection mold is a type of molding process more complex than single injection mold, and the cost of double injection mold also higher than single injection mold. Single and double injection molding using a single molding machine is made possible by providing two injection units, each having an injection nozzle, and a stationary platen three insertion holes into which the nozzles can fit.
For double injection, the injection units are moved transversely of the stationary platen so as to orient both injection nozzles with a respective one of the insertion holes. For single injection, the injection units again are moved transversely of the stationary platen so as to orient one of the injection nozzles with one of the insertion holes, with the other nozzle not being so oriented.
Most double injection mold products are applied to the following categories: 1) Consumer goods. Such as, electric shavers, pen shells, spectacle frames, shells of phone’s push –button, bottle caps, and etc. 2) Spare parts for car. Such as, car lampshades, plastic steering wheels, acoustics sound, knobs, and handles, etc. 3) Medical equipments. Such as, thermometer and ear thermometer, etc. 4) Electronic 3C industry. Such as, cellphones, mp3, mp4, game machines, and earphones, etc.
About double injection molding method that a unit is moved transversely parallel to a stationary platen having three nozzle insertion holes at equal intervals in a row horizontally, so that the two injection units provided parallel to each other on support members which are part of the transverse moving unit are moved and positioned in a double molding position, in which the nozzles of the injection units are oriented to the two lateral nozzle insertion holes; double injection molding is performed thereafter;
The transverse moving unit is moved transversely parallel to the stationary platen so that the injection units are moved and positioned in a single injection molding position in which the nozzle of one of the injection units is oriented to the central nozzle insertion hole; and single injection molding is performed thereafter.
The double injection molding machine provided in accordance with the present invention includes the three nozzle insertion holes provided in the stationary platen of the clamping unit so that the holes are located at the equal intervals in the horizontal row; the transverse moving unit which is transversely moved in parallel with the stationary platen; the two injection units provided parallel to each other on the support members provided on the transverse moving unit; drive means provided for the transverse moving unit so as to move the unit to the double injection molding position, in which the nozzles of the injection units are oriented to the two lateral nozzle insertion holes, or to the single injection molding position, in which the nozzle of one of the injection units is oriented to the central nozzle insertion hole; and a positioning mechanism provided for the transverse moving unit so as to position it in either of the double and the single injection molding positions.
In each of the method and the machine which are provided in accordance with the present invention, the two injection units are moved back on the support members so that a prescribed distance is set between the stationary platen and the tip of each of the nozzles of the injection units. The transverse moving unit then is translated or moved transversely back or forth in the direction of the width of the bed of the machine, so that the injection units are moved and positioned in the double injection molding position, in which the nozzles of the injection units are oriented to the two lateral nozzle insertion holes of the stationary platen. Thereafter, the injection units are moved forth so that the nozzles thereof are inserted into the two lateral nozzle insertion holes. After that, molten synthetic resins are injected from the two injection units into the dies so that the double injection molding is performed.


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