Methods and machines for making oral products
A method of forming an oral product includes extruding a mixture, conveying the extruded mixture through one or more pairs of forming rollers, and cutting the extruded mixture into one or more oral products. The mixture can include polymer and at least one flavorant, sweetener, active ingredient, or combination thereof. The extruded mixture forms an extrudate having a predetermined cross-sectional shape. The one or more pairs of forming rollers abut to define a passage there between as each forming roller rotates. The passage has a cross-sectional shape corresponding to the predetermined cross-sectional shape. The method can be performed using a machine including an extruder, one or more pairs of forming rollers, and a cutting device.
1. A method of forming an oral product comprising:
a. extruding a mixture comprising a polymer and at least one flavorant, sweetener, active ingredient, or combination thereof to form an extrudate, the extrudate having a predetermined cross-sectional shape;
b. conveying the extrudate through at least a first pair of forming rollers, the first pair of forming rollers abutting and defining a passage there between as each forming roller rotates, the passage having a cross-sectional shape corresponding to the predetermined cross-sectional shape; and
c. cutting the extrudate after it has passed through the first pair of forming rollers to form an oral product.
2. The method of claim 1 , wherein the extrudate is conveyed through a plurality of pairs of forming rollers, wherein the plurality of pairs of forming rollers each abut and each define a passage therebetween as each forming roller rotates.
3. The method of claim 2 , wherein each passage of each pair of forming rollers has the same cross-sectional shape and dimensions.
4. The method of claim 2 , wherein the plurality of pairs of forming rollers are driven by a drive motor and a gear train to rotate each pair of forming rollers at the same outer linear speed.
5. The method of claim 1 , wherein the extrudate is extruded through an extrusion die having the same cross-section shape and dimensions as the passage of the first pair of forming rollers.
6. The method of claim 1 , wherein a temperature of the extrudate in step c is at least 10° C. less than a glass transition temperature of the polymer.
7. The method of claim 1 , wherein cutting the extrudate does not significantly alter the cross-sectional shape of the oral product from that of the extrudate.
8. The method of claim 1 , wherein the extrudate passes through a cutting ledger prior to being cut.
9. The method of claim 1 , wherein the extrudate is cut with a rotary cutting blade.
10. The method of claim 9 , wherein the rotary cutting blade is intermittently actuated by a sensor that detects a position of a leading edge of the extrudate.
11. The method of claim 1 , wherein the mixture comprises cellulosic fibers.
12. The method of claim 1 , wherein the mixture comprises nicotine.
13. The method of claim 1 , wherein the mixture comprises tobacco.
14. The method of claim 1 , wherein a programmable logic controller controls a speed of extruding the mixture, a speed of rotation of the first pair of forming rollers, and a speed or actuation of a cutting blade used to cut the extrudate.
15. The method of claim 1 , wherein the oral product has a length or width of between 5 mm and 25 mm and a thickness of between 1 mm and 10 mm.