Mold-tool system including nozzle-tip assembly configured for reduced axial tilting

1. A mold-tool system ( 100 ), comprising:

a nozzle assembly defining a melt channel;

a nozzle-tip assembly ( 200 ) defining a melt passage, the nozzle-tip assembly slidingly sealed against the nozzle assembly, the nozzle-tip assembly, the melt channel of the nozzle assembly being in fluid communication with the melt passage of the nozzle tip assembly, having:

a tip-body assembly ( 206 ); and,

a seal assembly at least partly surrounding the tip-body assembly comprising:

a first radial support being configured to supportably contact, at least in part, the mold assembly; and

a second radial support comprising an arm extending radially outward from the nozzle-tip assembly, the second radial support being configured to supportably contact, at least in part, the mold assembly, the second radial support being axially set apart from the first radial support along an axis of the nozzle tip assembly, and the first radial support and the second radial support being configured to reduce, at least in part, axial tilting of the nozzle-tip assembly relative to the nozzle assembly.

2. The mold-tool system ( 100 ) of claim 1 , wherein:

the second radial support ( 204 ) is axially set apart from the first radial support ( 202 ) along an axis ( 201 ) of the nozzle-tip assembly ( 200 ); and

the second radial support ( 204 ) and the first radial support ( 202 ) are located on opposite sides of the nozzle-tip assembly ( 200 ).

3. The mold-tool system ( 100 ) of claim 1 , wherein:

the seal assembly ( 208 ) including:

a shaft body ( 302 ) having the first radial support ( 202 ); and

an arm assembly ( 304 ) extending radially outwardly from the shaft body ( 302 ), the arm assembly ( 304 ) having the second radial support ( 204 ).

4. The mold-tool system ( 100 ) of claim 1 , wherein:

the nozzle-tip assembly ( 200 ) further includes:

a thermal-insulator assembly ( 210 ) surrounding a seal assembly ( 208 ), the thermal-insulator assembly ( 210 ) contacting the mold assembly ( 102 ), the thermal-insulator assembly ( 210 ) configured to thermally insulate, at least in part, the nozzle-tip assembly ( 200 ) from the mold assembly ( 102 ).

5. The mold-tool system ( 100 ) of claim 1 , wherein:

the nozzle-tip assembly ( 200 ) further includes:

a thermal-insulator assembly ( 210 ) surrounding a seal assembly ( 208 ), the thermal-insulator assembly ( 210 ) contacting the mold assembly ( 102 ), the thermal-insulator assembly ( 210 ) configured to thermally insulate, at least in part, the nozzle-tip assembly ( 200 ) from the mold assembly ( 102 ); and

a spring assembly ( 212 ) being located between, at least in part, the thermal-insulator assembly ( 210 ) and the seal assembly ( 208 ), the spring assembly ( 212 ) configured to bias, at least in part, the tip-body assembly ( 206 ) against a nozzle assembly ( 104 ).

6. The mold-tool system ( 100 ) of claim 1 , wherein:

an inner surface of the shaft body ( 302 ) avoids touching, at least in part, the outer surface of the tip-body assembly ( 206 ), so that there is an air located, at least in part, between the outer surface of the tip-body assembly ( 206 ) and the inner surface of the shaft body ( 302 ) of the seal assembly ( 208 ),

the shaft body ( 302 ) reduces heat transfer along the shaft body ( 302 ) toward an exit portal ( 211 ) of the tip-body assembly ( 206 ), and

the seal assembly ( 208 ) makes physical contact with the tip-body assembly ( 206 ) at a contact region ( 209 ), and the contact region ( 209 ) is located proximately midway between the opposite ends of the tip-body assembly ( 206 ).

7. The mold-tool system ( 100 ) of claim 1 , wherein:

the second radial support ( 204 ) is made from a material with a lower thermal conductivity than the tip-body assembly ( 206 ) of the nozzle-tip assembly ( 200 ) to minimize heat loss.

8. The mold-tool system ( 100 ) of claim 1 , wherein:

the second radial support ( 204 ) is an additional piece added to a back portion of the tip-body assembly ( 206 ).

9. The mold-tool system ( 100 ) of claim 1 , wherein:

the second radial support ( 204 ) is an extension of the tip-body assembly ( 206 ).

10. The mold-tool system ( 100 ) of claim 1 , wherein:

the second radial support ( 204 ) is used on other components of a hot runner system that utilizes sliding seals.

11. A molding system having the mold-tool system ( 100 ) of claim 1 .