Polymer concrete body with vibration molded threads, method of making same, and electrical insulator provided with the same

A method of manufacturing a body of an acicular aggregate bonded by a cured synthetic resin binder having at least one thread vibration molded therein comprising mixing of said aggregate and uncured synthetic resin binder under a vacuum of at least about 27 inches of mercury, vibration molding the resulting admixture against at least one thread die, and curing said polymer.

A body of acicular aggregate elements bonded by a cured synthetic resin binder having at least one thread therein;

• the acicular aggregate elements being aligned generally parallel to each other in regions adjacent said thread surface and being randomly aligned in the bulk of said body.

A method of manufacturing a body of acicular aggregate elements bonded by a cured synthetic resin binder having at least one thread therein, the acicular aggregate elements being aligned generally parallel to each other in regions adjacent said thread surface and being randomly aligned in the bulk of said body, comprising mixing of said aggregate elements and uncured synthetic resin binder under a vacuum of at least about 27 inches of mercury, providing a threaded die in contact with a part of said mixture, causing the acicular aggregate elements adjacent the surface of the threaded die to be generally parallelly aligned with one another, and curing said polymer.