Stretch wrapping machine with spare stretch rollers

Abstract

This relates to a stretch wrapping machine equipped with at least three spare stretch rollers. [Solution] The present invention relates to a stretch wrapping machine equipped with at least three pre-stretch rollers, wherein the pre-stretch rollers are sized, positioned, or configured to minimize necking and slippage as the film is pulled out and stretched through the pre-stretch rollers before the film is applied to the package.

Claims

1. A film carriage for a wrapping machine, Film carriage frame and A first pre- A stretch roller and A second pre- A stretch roller and A third pre- It is equipped with a stretch roller, and the third diameter is larger than the first and second diameters. A film carriage characterized by the following features.

2. The film according to claim 1, wherein the first diameter and the second diameter are substantially the same. carriage.

3. The third diameter is at least about twice the second diameter, as described in claim 1. Room carriage.

4. The first spare stretch roller, the second spare stretch roller and the third spare stretch roller The stretch roller has an effective area of ​​the third pre-stretch roller that is the same as the first pre-stretch roller. Effective area combining the effective area of ​​the stretch roller and the effective area of ​​the second pre-stretch roller The film carrier according to claim 1 is made to a size and position such that it exceeds the specified range. ridge.

5. The first spare stretch roller, the second spare stretch roller, and the third The auxiliary stretch roller is operably connected to the linear speed of the third auxiliary stretch roller. A pre-stretch drive that rotates the first pre-stretch roller at 15% to 95% of the degree The film carriage according to claim 1, further comprising a moving assembly.

6. The first spare stretch roller, the second spare stretch roller, and the third Further, a pre-stretch drive assembly is operably connected to the pre-stretch roller. The second spare stretch roller is set to a linear speed equal to 1% of the first spare stretch roller. The film carriage according to claim 1, which rotates at a linear velocity between 00% and 150%.

7. The first spare stretch roller, the second spare stretch roller, and the third The linear speed of the preliminary stretch roller is 1% to 15% of the total preliminary stretch of the film. The stretch during the % is between the first pre-stretch roller and the second pre-stretch roller This occurs between the film and the roller, and between 85% and 99% of the total preliminary stretching of the film. The stretcher is between the second pre-stretch roller and the third pre-stretch roller. The film carriage according to claim 1, which can be controlled to occur.

8. Critical distance between the first pre-stretch roller and the second pre-stretch roller The critical distance between the second pre-stretch roller and the third pre-stretch roller is A film carriage according to claim 1, which is shorter than the distance.

9. The outer edge of the first pre-stretch roller and the outer edge of the second pre-stretch roller The distance between the outer edge of the second pre-stretch roller and the third pre-stretch roller The film carriage according to claim 8, wherein the distance between it and the outer edge is the same as the distance between it and the outer edge.

10. It is a wrapping machine, Wrapping machine frame, A guide attached to the wrapping machine frame, The guide is movably connected and moves perpendicular to the wrapping machine frame. A guide actuator, The wrapping assembly, which is attached to the aforementioned guide and includes a film carriage, is also included. Uh, the film carriage is, Film carriage frame and Having a first diameter, the first is rotatably mounted on the film carriage frame Spare stretch roller and A second diameter is rotatably mounted on the film carriage frame. Spare stretch roller and A third having a third diameter and rotatably mounted on the film carriage frame A spare stretch roller, wherein the third diameter is larger than the first and second diameters. A third spare stretch roller, Move the wrapping assembly to move it relative to the guide. A wrapping assembly actuator that is operable and connected is characterized by comprising Wrapping machine.

11. The first diameter and the second diameter are substantially the same, according to claim 10. Topping machine.

12. Claim 10, wherein the third diameter is at least about twice the size of the second diameter. The wrapping machine described.

13. The first spare stretch roller, the second spare stretch roller, and the third spare The stretch roller has an effective area of ​​the third pre-stretch roller, and the first pre-stretch roller The effective area of ​​the stretch roller and the effective area of ​​the second pre-stretch roller are combined. The size is determined and positioning is performed so as to be greater than or equal to the effective area, as described in claim 10. Wrapping machine.

14. The first spare stretch roller, the second spare stretch roller, and the third The first spare stretch roller is operably connected to the spare stretch roller, the A second spare stretch roller, and a spare roller that drives the third spare stretch roller. Further equipped with a stretch drive assembly, The linear speed of the third pre-stretch roller is equal to the linear speed of the second pre-stretch roller. Greater than degrees, the linear speed of the second pre-stretch roller is greater than the linear speed of the first pre-stretch roller. The wrapping machine according to claim 10, wherein the linear velocity is greater than that of the roller.

15. The aforementioned pre-stretch drive assembly controls the first pre-stretch roller. The system is configured such that the first pre-stretch roller moves at a linear speed of 15 degrees relative to the third pre-stretch roller. The wrapping machine according to claim 14, which rotates between % and 95%.

16. The pre-stretch drive assembly is configured to control the second pre-stretch roller. Then, the second pre-stretch roller is moved at 100% of the linear speed of the first pre-stretch roller. The wrapping machine according to claim 14, which rotates between 150% and 250%.

17. The pre-stretch drive assembly comprises the first pre-stretch roller and the second The linear speed of the preliminary stretch roller and the third preliminary stretch roller is controlled. The stretch of the film between 1% and 15% of the total stretch is then applied to the first reserve The following is a claim 14, which is generated between the stretch roller and the second pre-stretch roller. The wrapping machine described.

18. The pre-stretch drive assembly comprises the first pre-stretch roller and the second The linear speed of the preliminary stretch roller and the third preliminary stretch roller is controlled. The stretch of the film between 85% and 99% of its total stretch is then applied to the second pre-stretch. A function is generated between the pre-stretch roller and the third pre-stretch roller, as described in claim 14. The wrapping machine described above.

19. Critical distance between the first pre-stretch roller and the second pre-stretch roller The critical distance between the second pre-stretch roller and the third pre-stretch roller is A wrapping machine according to claim 10, having a shorter distance than the distance.

20. The outer edge of the first pre-stretch roller and the outer edge of the second pre-stretch roller The distance between the outer edge of the second pre-stretch roller and the third pre-stretch roller The wrapping machine according to claim 19, wherein the distance between it and the outer edge is the same as the distance between it and the outer edge.

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