Abstract An injection molding apparatus of the type in which a piston moves a mass of material along a cylinder toward a nozzle and in which there is an internal plasticizing capsule within the cylinder which has a plurality of internal balls held in place therein so that the plastic material must be forced through the capsule and pass through the interstices between the balls, thereby thoroughly mixing the material and raising its temperature by friction to assist in plasticizing the same. The balls are held within the capsule in an arrangement which includes a large ball at each end of the capsule, there being an opening at each end, and a ring of smaller balls holding each large ball in place, the capsule being removable from the cylinder and capable of being disassembled to release the balls and permit ready cleaning.
The capsule of claim 1 in which the bodies comprise balls.
Claim 2
Dependent Claim
38 words
The capsule as claimed in claim 2 in which said member is formed of two parts secured together to retain said capsule and balls in assembly, but separable in an axial direction to enable removal of said balls.
Claim 3
Dependent Claim
13 words
The capsule of claim 1 in which said end ports are coaxial openings.
Claim 4
Dependent Claim
58 words
The capsule of claim 1 in which the bodies are balls, and there is a single ball of said second larger size disposed in each of said end ports with certain others of said smaller balls arranged in cooperative position relative to said larger size balls to constitute said certain others and said single balls said securing means.
Claim 5
Dependent Claim
27 words
The capsule of claim 5 in which said securing means include flanges surrounding said end ports to seat said certain other smaller balls in said cooperative position.
Claim 6
Dependent Claim
99 words
A capsule as claimed in claim 1 in which said bodies comprise balls, said ports comprise circular coaxial end openings, with one opening at each end of said member, said balls comprise a plurality of small interior balls, and a pair of large balls, said securing means including internal annular seating means about each said opening, there being a ring of smaller balls seated against each seating means of diameter substantially smaller than the diameter of said large balls, and one each of said pair being respectively secured internally of said rings of smaller balls and against said ring.
Claim 7
Dependent Claim
23 words
The capsule of claim 7 in which said member is formed of a plurality of parts capable of disassembly in an axial direction.
Claim 8
Dependent Claim
45 words
The capsule as claimed in claim 1 in Which said member is formed of two parts secured together to retain the capsule and bodies in assembly, but separable in an axial direction to enable removal of said bodies from said member independently of one another.