US 12,447,652 B2
Compression moulding machine and method
Massimo Balducci, Imola (IT); Fabrizio Pucci, Castelguelfo (IT); and Fiorenzo Parrinello, Medicina (IT)
Assigned to SACMI COOPERATIVA MECCANICI IMOLA SOCIETA' COOPERATIVA, Imola (IT)
Appl. No. 17/999,318
Filed by SACMI COOPERATIVA MECCANICI IMOLA SOCIETA' COOPERATIVA, Imola (IT)
PCT Filed May 20, 2021, PCT No. PCT/IB2021/054362
§ 371(c)(1), (2) Date Nov. 18, 2022,
PCT Pub. No. WO2021/234617, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 102020000011947 (IT), filed on May 21, 2020.
Prior Publication US 2023/0182355 A1, Jun. 15, 2023
Int. Cl. B29C 43/58 (2006.01); B29C 43/02 (2006.01); B29C 43/36 (2006.01)
CPC B29C 43/58 (2013.01) [B29C 43/02 (2013.01); B29C 2043/3689 (2013.01); B29C 2043/5875 (2013.01); B29C 2793/0081 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A compression moulding machine for making an object of polymeric material, comprising:
an extrusion unit configured to extrude a rod of pasty polymeric material;
a cutting element, configured to portion the rod into individual charges;
at least one mould configured to receive a respective charge and to form a corresponding object from the charge;
a feeder, configured to convey each charge to the at least one mould at a feed position, and
an inspecting device, having an emitter configured to emit a beam of electromagnetic waves, and a receiver, configured to receive absorption data representing the absorption of the electromagnetic waves by the rod or the charge, the inspecting device being configured to capture inspection data, representing one or more chemical or physical properties a composition of the rod or of the charges,
wherein the extrusion unit includes:
a first extruder, configured to extrude a first pasty material;
a second extruder, configured to extrude a second pasty material; and
a co-extruder, configured to receive the first material and the second material from the first extruder and the second extruder, respectively, and to extrude the rod, which comprises the first material and the second material,
wherein the inspecting device is configured to detect a presence of the second material in the rod,
wherein the co-extruder is configured to extrude the second material intermittently in the rod along an extrusion direction to define portions of the second material spaced along the extrusion direction, and
wherein the inspection data represent an absence of the second material at specific inspection points on the rod.