Cutting machine and manufacturing system for fixed size sheet

• US 20060075863A1
• Filed: 10/04/2005
• Published: 04/13/2006
• Est. Priority Date: 10/08/2004
• Status: Abandoned Application

• Current Assignee: Sumitomo Chemical Company Limited, Teipi Thermal Engineering Company Limited, Teikoku Piston Ring Company Limited (TPR Co., Ltd.)
• Original Assignee: Sumitomo Chemical Company Limited, Teipi Thermal Engineering Company Limited, Teikoku Piston Ring Company Limited (TPR Co., Ltd.)
• Inventors: Watanuki, Yoshihiko, Kashimoto, Takahisa
• Application Number:
  US11/242,119
• Publication Number:
  US 20060075863A1
• Time in Patent Office: Days
• US Class Current: 83/452
• CPC Class Codes: B26D 1/08 of the guillotine type
• CPC Class Codes: B26D 1/085 for thin material, e.g. for sheets, strips or the like
• CPC Class Codes: B26D 7/025 acting upon planar surfaces B26D7/04 takes precedence
• CPC Class Codes: B26D 7/2614 Means for mounting the cutting member
• CPC Class Codes: Y10T 83/7487 Means to clamp work
• CPC Class Codes: Y10T 83/9447 Shear type

Abstract

A cutting machine 10 includes an upper blade 12A and a lower blade 12B installed at upper and lower positions, and resilient members 19A, 19B installed on both sides of the blades and protruding more than the blades for supporting a hard plastic sheet 7 during cutting. The resilient members installed on both sides of either of the upper and lower blades include a resilient member at a section near the blade and a resilient member at a section far from the blade, and the hardness of the resilient member at a section near the blade is different from the hardness of the resilient member at a section far from the blade.

Claims

1. A cutting machine comprising an upper blade and a lower blade installed at upper and lower positions, and resilient members installed on both sides of the blades and protruding more than the blades for supporting a hard plastic sheet during cutting, wherein

the resilient members installed on both sides of either of the upper and lower blades include a resilient member at a section near the blade and a resilient member at a section far from the blade;

and the hardness of the resilient member at a section near the blade is different from the hardness of the resilient member at a section far from the blade.

2. A cutting machine as claimed in claim 1, wherein the hardness of the resilient member at a section near the blade is lower than the hardness of the resilient member at a section far from the blade.

3. A cutting machine as claimed in claim 2, wherein the cross section of the resilient member at a section far from the blade is a circular or ring shape.

4. A cutting machine as claimed in claim 2, wherein a deformation suppressing member is installed to suppress deformation of the resilient member at a section far from the blade.

5. A cutting machine as claimed in claim 1, wherein the hardness of the resilient member at a section near the blade is higher than the resilient member at a section far from the blade.

6. A cutting machine as claimed in claim 1, wherein the blade tips of the upper blade and the lower blade are a linear shape.

7. A cutting machine as claimed in claim 6, wherein a variation in the blade tip gap in the vertical direction of the upper blade and the lower blade is 0.2 millimeters or less across the width, and a variation in the blade tip gap in the horizontal direction of the upper blade and the lower blade is 0.1 millimeter or less across the width.

8. A cutting machine as claimed in claim 1, wherein the cutting machine is mounted on a synchronous cart capable of moving in synchronization with the speed of the continuous flow of the hard plastic sheet in the progress direction, and moving in the reverse direction and returning.

9. A cutting machine as claimed in claim 1, wherein the hard plastic sheet is acrylic sheet with a thickness of 0.5 to 20 millimeters, and a rubber content additive rate of 0 or less than 10 percent.

10. A manufacturing system for fixed size sheet comprising a cutting machine as claimed in claim 1, and a die for forming heated and melted hard synthetic resin in a sheet shape and continuously extruding a hard plastic sheet, wherein the cutting machine cuts along the width direction, the hard plastic sheet continuously flowing in the extrusion direction from the die.