Material processing head and tool

1. A displaceable material processing head, comprising: a support base; a plurality of tool mounting blocks mounted on an outer surface of the support base, each mounting block having a base surface and a tool mounting surface intersecting the base surface, the base surface having a protuberance extending away therefrom and spaced apart from the tool mounting surface to define a tool receiving gap between the protuberance and the tool mounting surface, the tool mounting surface extending past the protuberance, the protuberance having a rear surface facing the tool mounting surface across the tool receiving gap and a front surface spaced apart forwardly from the rear surface, the rear surface extending between opposed lateral sides and having a recessed portion between the lateral sides, the rear surface being convex and the recessed portion spaced further rearward from the front surface than the lateral sides; a tongue extending from the base surface in the tool receiving gap, the protuberance extending past the tongue, the tongue extending from the rear surface of the protuberance to the tool mounting surface, the tongue having an exposed surface; and a plurality of tools for material processing each retained in a respective one of the mounting blocks, each tool having a base section and a processing section extending from the base section, the base section being snugly received in the tool receiving gap of the respective one of the mounting blocks between the tool mounting surface and the protuberance and on the exposed surface of the tongue, the base section having a rear surface abutted to the tool mounting surface and having a shape complementary to the tool mounting surface, the base section having a front surface being concave and abutted to the convex rear surface of the protuberance, the processing section extending past the protuberance.

2. The material processing head as defined in claim 1 , wherein the tool mounting surface is concave, and the rear surface of the base section is convex.

3. The material processing head as defined in claim 1 , wherein the tool mounting surface and the rear surface of the base section have a V-shaped profile.

4. The material processing head as defined in claim 1 , wherein the support base includes a rotatable cylindrical drum, the base surface of each mounting block extending tangentially with respect to the outer surface of the cylindrical drum, and the tool mounting surface of each mounting block extending radially with respect to the cylindrical drum.

5. The material processing head as defined in claim 1 , wherein each mounting block is connected to the base section of the corresponding one of the tools by at least one fastener, each fastener being spaced apart from the protuberance.

6. The material processing head as defined in claim 1 , wherein at least one of the tools is a cutting tooth, the processing section of said tool being a cutting section, the cutting section angled forwardly at an end of the base section and defining a cutting edge.

7. The material processing head as defined in claim 6 , wherein the support base is rotatable, the cutting section of each cutting tooth having a front surface at the cutting edge oriented at a first angle relative to a radial line of the support base extending from the cutting edge, the first angle having a value of 45 degrees±5 degrees.

8. The material processing head as defined in claim 7 , wherein the cutting edge of each cutting tooth defines a cutting circumference upon rotation of the support base, the cutting section of each cutting tooth having a rear surface at the cutting edge oriented at a second angle relative to the tangent to the cutting circumference at the cutting edge, the second angle having a value of 8 degrees±5 degrees.

9. A material processing tool assembly, comprising: a tool for material processing having a base section and a processing section extending from the base section; and a tool mounting block mountable on an outer surface of a support base, the mounting block comprising a base surface and a tool mounting surface intersecting the base surface, the base surface having a protuberance extending away therefrom and spaced apart from the tool mounting surface to define a tool receiving gap between the protuberance and the tool mounting surface, the tool mounting surface extending past the protuberance, the protuberance having a rear surface facing the tool mounting surface across the tool receiving gap and the protuberance having a front surface spaced apart forwardly from the rear surface, the rear surface extending between opposed lateral sides and having a recessed portion between the lateral sides, the rear surface being convex and the recessed portion spaced further rearward from the front surface than the lateral sides, a tongue extending from the base surface in the tool receiving gap, the protuberance extending past the tongue, the tongue extending from the rear surface of the protuberance to the tool mounting surface, the base section of the tool being snugly received in the tool receiving gap between the tool mounting surface and the protuberance and on an exposed surface of the tongue, the base section having a rear surface abutted to the tool mounting surface and having a shape complementary to the tool mounting surface, the base section having a front surface being concave and abutted to the convex rear surface of the protuberance, the processing section of the tool extending past the protuberance.

10. The assembly as defined in claim 9 , wherein the tool mounting surface is concave, and the rear surface of the base section is convex.

11. The assembly as defined in claim 9 , wherein the tool mounting surface and the rear surface of the base section have a V-shaped profile.

12. The material processing head as defined in claim 1 , wherein the front surface of the protuberance has a shape being different than a shape of the rear surface of the protuberance.

13. The material processing head as defined in claim 12 , wherein the front surface of the protuberance is linear.

14. The material processing head as defined in claim 1 , wherein the base section of the tool is wider than the tongue.

15. The material processing head as defined in claim 1 , wherein the tongue is integral with the protuberance and forms a monolithic component therewith.