A mechanism for replacing a roll of elastic web

Abstract

This invention discloses an unwinding and changing mechanism for elastic roll materials, relating to the field of patch production equipment technology. It includes a frame on which at least two active unwinding rollers and an openable first pair of rollers are mounted. A roll material cutting mechanism is provided on the roll material transport path, between the active unwinding rollers and the first pair of rollers. When the two clamping rollers of the first pair of rollers are relatively open, a first roll material and / or a second roll material pass through. When the two clamping rollers of the first pair of rollers are relatively closed, they clamp the first roll material and the second roll material to move them and bond them together.

Description

Technical Field

[0001] This invention relates to the field of patch production equipment technology, specifically to an unwinding and changing mechanism for elastic roll materials. Background Technology

[0002] In the patch production process, the ointment needs to be applied to an elastic fabric. Patch production equipment includes unwinding rollers, take-up rollers, and roll conveying devices. The rolled material is mounted on the unwinding rollers, then unwound and conveyed on the conveying device, and finally wound onto the take-up rollers for winding. The coating is applied during the unwinding process. With existing unwinding mechanisms, when a roll is almost unwound and a changeover is needed, the machine must be stopped, the old roll cut, removed from the unwinding rollers, and a new roll installed. The new roll is then joined to the currently conveying roll before the machine is restarted to continue coating. However, stopping the machine significantly impacts patch production. After restarting, various parameters of the patch production equipment require time to adjust to meet requirements. For example, the roll conveying speed and the coating parameters need adjustment and retesting before qualified products can be produced. On the one hand, the long adjustment time after restarting severely impacts production efficiency; on the other hand, the adjustment process can produce defective products, resulting in material waste. The above problems urgently need to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide an unwinding and changing mechanism for elastic roll materials, which can change the roll material without stopping the machine, thereby improving the production efficiency of patch production equipment and reducing material waste.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A resilient roll unwinding and changing mechanism includes a frame, on which at least two active unwinding rollers and an openable first pair of rollers are provided, and a roll cutting mechanism is provided on the roll transport path and between the active unwinding rollers and the first pair of rollers.

[0006] When the two clamping rollers of the first pair of rollers mechanism are open relative to each other, the first roll and / or the second roll are passed through; when the two clamping rollers of the first pair of rollers mechanism are closed relative to each other, the first roll and the second roll are clamped to drive the first roll and the second roll to move and to bond the first roll and the second roll together.

[0007] Optionally, at least one of the two clamping rollers in the first roller mechanism is an active rotating roller.

[0008] Optionally, it further includes a control device for controlling the speed difference between the roll conveying speed of the first pair of rollers mechanism and the unwinding speed of the active unwinding roller, wherein the control device controls the speed difference to be above a first preset value.

[0009] Optionally, the first roller mechanism includes a first clamping roller and a second clamping roller disposed opposite to each other, a first moving device for moving the first clamping roller closer to or away from the second clamping roller, and a second moving device for moving the second clamping roller away from and closer to the first clamping roller.

[0010] Optionally, the roll cutting mechanism includes a heating wire, a first fixing seat for fixing the heating wire, and a third moving device for moving the first fixing seat away from and towards the roll.

[0011] Optionally, the heating wire is a rigid heating wire heated by a first power source, which is an AC voltage source.

[0012] Optionally, the heating wire is a soft heating wire heated by a second voltage source, the second voltage source being a DC voltage source. The first fixing base is also provided with a spring connected to the soft heating wire for compensating for the expansion and contraction of the soft heating wire, and a guide wheel for supporting the soft heating wire.

[0013] Optionally, the soft heating wire is a strip heating wire, with the wider side of the strip heating wire facing the roll material.

[0014] Optionally, the heating wire is a nickel-chromium heating wire.

[0015] Optionally, several auxiliary conveying rollers are also provided on the frame along the conveying path of the roll material.

[0016] In this invention, the first roller mechanism clamps the first and second rolls of adhesive material during the forward conveying of the first roll, and drives them to continue forward. During this process, an adhesive material can be pre-coated onto the second roll, causing the first and second rolls to bond together as they are clamped and conveyed forward. Then, a roll cutting mechanism cuts the portion of the first roll connected to the first active unwinding roller, completing the roll change from the first to the second roll. In other words, this invention allows for roll changing without stopping the machine, thereby improving the production efficiency of the adhesive patch production equipment and reducing material waste. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the unwinding and changing mechanism for the first type of elastic roll material;

[0018] Figure 2 for Figure 1A schematic diagram showing the hidden portion of the structure.

[0019] Figure 3 This is a schematic diagram of the first pair of rollers mechanism and the roll cutting mechanism;

[0020] Figure 4 This is a schematic diagram of the first pair of rollers mechanism;

[0021] Figure 5 This is a schematic diagram of a roll material cutting mechanism;

[0022] Figure 6 This is a schematic diagram of the soft heating wire and the first fixing base;

[0023] Figure 7 for Figure 6 A diagram from another perspective.

[0024] In the figure, 1. First active unwinding roller; 2. Second active unwinding roller; 3. Roll material cutting mechanism; 4. First roller pairing mechanism; 5. Conveyor belt; 6. First auxiliary conveyor roller; 7. Second auxiliary conveyor roller; 8. Third auxiliary conveyor roller; 11. First rotating roller; 12. First motor; 21. Second rotating roller; 22. Second motor; 31. First fixed seat; 32. Heating wire; 33. Slider; 34. Slide rail; 35. First cylinder; 41. First clamping roller; 42. Second clamping roller; 43. Third motor; 44. Second cylinder; 45. Third cylinder; 46. Second fixed seat; 47. Third fixed seat; 48. Slide groove; 100. First roll material; 200. Second roll material; 311. Guide wheel; 312. Spring. Detailed Implementation

[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus or methods consistent with some aspects of the present invention.

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0027] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the invention as described in the claims. Additionally, the complete contents of the configurations represented in the embodiments below are not limited to those necessary for the solution of the invention described in the claims.

[0028] See Figure 1-7 This invention provides an unwinding and changing mechanism for elastic roll materials, including a frame with at least two active unwinding rollers, namely a first active unwinding roller 1 and a second active unwinding roller 2. The frame also includes an openable and closable first pair of rollers mechanism 4. When the two clamping rollers of the first pair of rollers mechanism 4 are open relative to each other, the first roll material 100 and / or the second roll material 200 pass through. When the two clamping rollers of the first pair of rollers mechanism 4 are closed relative to each other, they clamp the first roll material 100 and the second roll material 200 to move them and bond them together. The frame also includes a roll material cutting mechanism 3 for cutting the roll material. The roll material cutting mechanism 3 is located between the active unwinding rollers and the first pair of rollers mechanism 4, meaning that during unwinding, the roll material first passes through the roll material cutting mechanism 3 and then through the first pair of rollers mechanism 4.

[0029] The roll material cutting mechanism can be a single unit, which cuts both the first roll 100 and the second roll 200; alternatively, two units can be used, one for cutting the first roll 100 and the other for cutting the second roll 200. The figure shows the case of two roll material cutting mechanisms. The specific form of the roll material cutting mechanism 3 is not limited; it can be a blade that moves from one end to the other, and the blade can be a rotating blade or a regular blade; it can also be a scissor structure; or it can be a heating wire to heat and cut the elastic fabric.

[0030] An active unwinding roll refers to a rotating roll equipped with a drive unit; see [link / reference]. Figure 2 The first active unwinding roller 1 includes a first rotating roller 11 and a first motor 12. The first motor 12 and the first rotating roller 11 are connected, either directly or through a transmission mechanism such as a reducer. During unwinding, the first motor 12 drives the first rotating roller 11 to rotate and unwind. The second active unwinding roller 2 includes a second rotating roller 21 and a second motor 22.

[0031] The roll changing process: see [link / reference] Figure 1Taking the first roll 100 mounted on the first active unwinding roller 1 as the roll being transported, and the second roll 200 mounted on the second active unwinding roller 2 as the spare roll, the first roll 100 sequentially passes through the first auxiliary conveyor roller 6, a roll cutting mechanism 3, a first pair of rollers mechanism 4, a third auxiliary conveyor roller 8, and a conveyor belt 5, and then through other conveying devices, finally reaching the take-up roller for winding. During this process, the roll cutting mechanism 3 does not cut the first roll 100, and the first pair of rollers mechanism 4 is in an open state. When the first roll 100 is almost used up, it needs to be changed. At this time, the second roll 200 is unrolled, and then the second roll 200 is sequentially passed through another roll cutting mechanism 3 and the first pair of rollers mechanism 4. At this time, an adhesive material, such as double-sided tape, can be pre-coated on the second roll 200. Then, the two clamping rollers of the first pair of rollers mechanism 4 are closed, and the second active unwinding roller 2 is activated. At this time, the two clamping rollers will clamp the first roll 100 and the second roll 200. The two clamping rollers rotate and drive the first roll 100 and the second roll 200 to continue to be conveyed forward together. It should be noted that at this time, neither the take-up roller nor the first active unwinding roller 1 stops rotating. During this process, the part of the second roll 200 coated with adhesive material will adhere to the first roll 100 under the squeezing action of the two clamping rollers. Then, the roll cutting mechanism 3 cuts the first roll 100 at the position between the first active unwinding roller 1 and the first pair of rollers mechanism 4. Subsequently, the first pair of rollers mechanism 4 switches to the open state, thus completing the roll changing operation, and the second active unwinding roller 2 unwinds the second roll 200. When the second roll 200 is almost used up, a new roll is installed on the first active unwinding roller 1, and the above operation is repeated to change the roll.

[0032] In other words, this invention allows for the replacement of roll materials without shutting down the machine, thereby improving the production efficiency of patch production equipment and reducing material waste.

[0033] Optionally, at least one of the two clamping rollers in the first pair of rollers mechanism 4 is an active rotating roller.

[0034] See Figure 4 The first pair of rollers mechanism 4 includes a first clamping roller 41 and a second clamping roller 42. The first clamping roller 41 is connected to a third motor 43 to form an active rotating roller. When the first pair of rollers mechanism 4 is in the closed state and clamps the first roll 100 and the second roll 200, the third motor 43 drives the first clamping roller 41 to rotate, and the rotation of the first clamping roller 41 will drive the second clamping roller 42 to rotate.

[0035] Because the first roll 100 is conveyed forward at a certain speed before the first roller mechanism 4 clamps the first roll 100 and the second roll 200, setting at least one clamping roller as an active rotating roller better ensures that the conveying speed of the rolls before clamping the first roll 100 and the second roll 200 is not affected, preventing the portion of the rolls after passing the first roller mechanism 4 from being stretched. The roll conveying speed of the first roller mechanism 4 is preferably greater than or equal to the roll take-up speed.

[0036] Optionally, it also includes a control device for controlling the speed difference between the roll conveying speed of the first pair of rollers mechanism 4 and the unwinding speed of the active unwinding roller, wherein the control device controls the speed difference to be above a first preset value.

[0037] Because the roll material is elastic, it is difficult to cut in a relaxed state. By adding a control device, the roll material conveying speed of the first pair of rollers mechanism 4 is made greater than the unwinding speed of the active unwinding roller. In this way, the portion of the roll material between the first pair of rollers mechanism 4 and the active unwinding roller will be in a taut state, which facilitates cutting. The specific value of the speed difference can be determined according to the cutting capability of the roll material cutting mechanism and the material properties of the elastic roll material.

[0038] Specifically, the rotational speed of the first clamping roller 41 in the first pair of rollers mechanism 4 can be set to a fixed value, which can be greater than the maximum winding speed in the patch production process. The control device may include a detection device for detecting the unwinding speed of the active unwinding roller and a controller. The controller is used to control the rotational speed of the active unwinding roller, that is, to control the speed difference by controlling the rotational speed of the active unwinding roller.

[0039] Of course, the control device can also be a speed detection device and controller that detects the rotational speed of the first pair of rollers 4, and control the speed difference by controlling the rotational speed of the first pair of rollers.

[0040] Optionally, the first pair of rollers mechanism 4 includes a first clamping roller 41 and a second clamping roller 42 disposed opposite to each other, a first moving device for moving the first clamping roller 41 toward and away from the second clamping roller 42, and a second moving device for moving the second clamping roller 42 away from and toward the first clamping roller 41.

[0041] See Figure 4The first moving device may include a second cylinder 44, a third fixed base 47, and a first clamping roller 41 disposed on the third fixed base 47. The second cylinder 44 is connected to the third fixed base 47, and both ends of the third fixed base 47 are slidably disposed in the slide grooves 48 on the frame. The second moving device may include a third cylinder 45, a second fixed base 46, and a second clamping roller 42 disposed on the second fixed base 46. The third cylinder 45 is connected to the second fixed base 46, and both ends of the second fixed base 46 are slidably disposed in the slide grooves 48 on the frame. When both the second cylinder 44 and the third cylinder 45 are extended, the first pair of rollers mechanism 4 is in a closed state. When both the second cylinder 44 and the third cylinder 45 are retracted, the first pair of rollers mechanism 4 is in an open state. The first clamping roller 41 and the second clamping roller 42 are respectively connected to the first moving device and the second moving device, so that the first clamping roller 41 and the second clamping roller 42 can clamp the first roll 100 and the second roll 200 when closed, and separate from the first roll 100 and the second roll 200 respectively when open.

[0042] Optionally, the roll cutting mechanism 3 includes a heating wire 32, a first fixing seat 31 for fixing the heating wire 32, and a third moving device for moving the first fixing seat 31 away from and towards the roll.

[0043] See Figure 5 , Figure 5 The diagram shows two roll material cutting mechanisms 3, used for cutting the first roll material 100 and the second roll material 200, respectively. A third moving device includes a first cylinder 35, a slider 33, and a slide rail 34. The slide rail 34 is mounted on the frame. Slider 33 is provided at both ends of the first fixed base 31, and the first cylinder 35 is connected to the slider. When the first cylinder 35 extends, the heating wire 32 approaches the roll material and cuts it; when the first cylinder 35 retracts, the heating wire 32 moves away from the roll material.

[0044] Optionally, the heating wire 32 is a rigid heating wire heated by a first power source, which is an AC voltage source. See also Figure 5 The figure shows the case of rigid heating wire. The deformation of rigid heating wire due to thermal expansion and contraction is small. It can be fixed on the first fixing base 31. It needs to be heated by a high voltage AC power source, such as 220V AC power.

[0045] Optionally, the heating wire 32 is a soft heating wire heated by a second voltage source, which is a DC voltage source. The first fixed base 31 is also provided with a spring 312 connected to the soft heating wire to compensate for the expansion and contraction of the soft heating wire, and a guide wheel 311 to support the soft heating wire.

[0046] See Figure 6 and Figure 7The diagram illustrates the use of a flexible heating wire. The flexible heating wire can be heated by a low-voltage DC source, such as 24V DC. One end of the heating wire 32 is fixed to one end of the first fixing base 31 and extends in front of the first fixing base 31. The other end of the wire then passes around the first fixing base 31 and connects to a spring 312 on the back of the first fixing base 31. The other end of the spring 312 is also connected to the back of the first fixing base 31. A guide wheel 311 is also provided at the other end of the first fixing base 31, and the heating wire 32 is wrapped around the guide wheel 311. The guide wheel 311 can be either rotatable or non-rotatable. The flexible heating wire undergoes significant thermal expansion and contraction. When heated, the flexible heating wire lengthens, and the spring 312 contracts, thus keeping the flexible heating wire taut during heating to facilitate the burning off of the rolled material. Due to the presence of the guide wheel 311, the flexible heating wire is less likely to be damaged when it lengthens or shortens.

[0047] Optionally, the soft heating wire is a strip heating wire, with the wider side of the strip heating wire facing the roll material.

[0048] Optionally, the heating wire is a nickel-chromium heating wire.

[0049] Optionally, several auxiliary conveying rollers are also provided on the frame along the conveying path of the roll material.

[0050] See Figure 3 A first auxiliary conveying roller 6 and a second auxiliary conveying roller 7 may be provided above the roll material cutting mechanism 3, and a third auxiliary conveying roller 8 may be provided below the first roller pair mechanism 4.

Claims

1. A rewinding and changing mechanism for elastic roll material, comprising a frame, characterized in that, The frame is provided with a first active unwinding roller, a second active unwinding roller, and an openable first pair of rollers mechanism. A roll cutting mechanism is provided between the first active unwinding roller, the second active unwinding roller, and the first pair of rollers mechanism on the roll material transport path. When the two clamping rollers of the first pair of rollers are open relative to each other, the first roll and / or the second roll are passed through; when the two clamping rollers of the first pair of rollers are closed relative to each other, the first roll and the second roll are clamped to drive the first roll and the second roll to move and to bond the first roll and the second roll together. Both the first roll and the second roll are elastic rolls. At least one of the two clamping rollers in the first roller mechanism is an active rotating roller. When it is necessary to switch the first roll to the second roll, the second roll is unrolled and pre-coated with adhesive material. Then the second roll passes through the first roller mechanism. Then the two clamping rollers of the first roller mechanism close and the second active unwinding roller is opened. At this time, the two clamping rollers of the first roller mechanism clamp the first roll and the second roll. The two clamping rollers rotate and drive the first roll and the second roll to continue to be conveyed forward together. At this time, the first active unwinding roller continues to rotate. During this process, the part of the second roll coated with adhesive material will adhere to the first roll under the squeezing action of the two clamping rollers. Then the roll cutting mechanism cuts the first roll. It also includes a control device for controlling the speed difference between the roll conveying speed of the first pair of rollers mechanism and the unwinding speed of the active unwinding roller, wherein the control device controls the speed difference to be above a first preset value.

2. The unwinding and changing mechanism for the elastic roll material as described in claim 1, characterized in that, The first roller mechanism includes a first clamping roller and a second clamping roller arranged opposite to each other, a first moving device for moving the first clamping roller closer to or away from the second clamping roller, and a second moving device for moving the second clamping roller away from and closer to the first clamping roller.

3. The unwinding and changing mechanism for the elastic roll material as described in claim 1, characterized in that, The roll cutting mechanism includes a heating wire, a first fixing seat for fixing the heating wire, and a third moving device for moving the first fixing seat away from and towards the roll.

4. The unwinding and changing mechanism for the elastic roll material as described in claim 3, characterized in that, The heating wire is a rigid heating wire heated by a first power source, which is an AC voltage source.

5. The unwinding and changing mechanism for the elastic roll material as described in claim 3, characterized in that, The heating wire is a soft heating wire heated by a second voltage source, which is a DC voltage source. The first fixed base is also provided with a spring connected to the soft heating wire to compensate for the expansion and contraction of the soft heating wire, and a guide wheel to support the soft heating wire.

6. The unwinding and changing mechanism for the elastic roll material as described in claim 5, characterized in that, The soft heating wire is a strip heating wire, with the wider side of the strip heating wire facing the roll material.

7. The unwinding and changing mechanism for the elastic roll material as described in claim 6, characterized in that, The heating wire is a nickel-chromium heating wire.

8. The unwinding and changing mechanism for the elastic roll material as described in claim 1, characterized in that, Along the conveying path of the roll material, the frame is also equipped with several auxiliary conveying rollers.

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