Method and apparatus for producing flashless axial leaded devices
AssigneeMotorola, Inc.
InventorRodolfo G. Barnadas
Life of this patent
Estimating the term…
Abstract
A flashless mold for encapsulating axial leaded devices (24) with a protective plastic material. The plastic material is introduced through a gate (27) which is positioned such that the leads of the electronic devices (24) are not wetted by the plastic material. This gate design, combined with a tight fitting groove for the terminal wires eliminates flash on the terminal wires. A spring retainer (28) acts to hold the individual devices accurately in place in the mold cavity facilitating loading and unloading of the mold.
Claims14
A method for flashless molding of axial leaded devices, comprising:
- providing a plurality of axial leaded devices requiring encapsulation;
- providing a mold having a plurality of mold cavities, each cavity surrounding a portion of a corresponding axial leaded device to be encapsulated;
- providing a mold rack to support the leads of the axial leaded devices;
- providing a spring comb on the mold rack to hold the leads of the axial leaded devices in position on the mold rack;
- positioning the mold rack onto the mold in such a way that the axial leaded devices are accurately located in the mold cavities at a predetermined position;
- and
- introducing a molding fluid into the mold cavities through a corresponding gate positioned such that the portion of the axial leaded devices leads which are outside of the mold cavities are not wetted by a molding fluid.
A flashless mold for axial leaded devices, comprising:
- a mold;
- a plurality of axial leaded devices;
- a plurality of mold cavities fabricated within the mold, each cavity surrounding a portion of a corresponding axial leaded device to be encapsulated and each cavity having a gate positioned such that leads of the leaded devices outside of the mold cavities are not wetted by a molding fluid used for encapsulation of the axial leaded devices;
- a mold rack attached to the mold so as to support the leads of the axial leaded devices in a predetermined position within the mold;
- and
- a spring comb fastened to the mold rack for holding the leads of the axial leaded devices on the mold rack.
A flashless mold for axial leaded devices, comprising:
- a mold;
- a plurality of axial leaded devices;
- a mold rack used to facilitate loading and unloading of the axial leaded devices from corresponding cavities in the mold;
- a spring comb which holds the leads of the axial leaded devices in position on the mold rack;
- and
- a means to position the mold rack onto the mold such that the portion of the axial leaded devices to be encapsulated are accurately positioned in the corresponding mold cavity.
Dependencies are inferred from the claim text.