WO2020223870A1 - 一种薄膜自动切断的收卷换卷装置 - Google Patents

一种薄膜自动切断的收卷换卷装置 Download PDF

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Publication number
WO2020223870A1
WO2020223870A1 PCT/CN2019/085671 CN2019085671W WO2020223870A1 WO 2020223870 A1 WO2020223870 A1 WO 2020223870A1 CN 2019085671 W CN2019085671 W CN 2019085671W WO 2020223870 A1 WO2020223870 A1 WO 2020223870A1
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WIPO (PCT)
Prior art keywords
winding
station
alloy wire
rewinding
shaft
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PCT/CN2019/085671
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English (en)
French (fr)
Inventor
赵琦
杨正昊
秦承斌
韦有共
王佳宁
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桂林电器科学研究院有限公司
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Priority to PCT/CN2019/085671 priority Critical patent/WO2020223870A1/zh
Publication of WO2020223870A1 publication Critical patent/WO2020223870A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/26—Cutting-off the web running to the wound web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/28—Attaching the leading end of the web to the replacement web-roll core or spindle

Definitions

  • the invention relates to the field of film production, in particular to a winding and changing device for automatically cutting the film.
  • the control method is to use a solenoid valve to control the airflow direction and use a cylinder to control the movement and speed of the swing arm breaking knife.
  • the characteristic is simple structure.
  • the disadvantage is that it is often impossible to cut the film, especially when the film tension is small, and the process requirements cannot be met.
  • the other is the film cutting knife running on the track.
  • Its control method is to use a servo motor to control the reciprocating motion of the cutting knife to cut the film. It is characterized by fast running speed, even when the film tension is small. Cut the film, but the disadvantage is that the cut surface of the film is often uneven, and the film is wrinkled, which affects the quality of the film.
  • patent CN104528434B discloses an automatic winding and changing device, including a frame, a double-station winding mechanism and an automatic changing mechanism.
  • the automatic changing mechanism includes a cutter mechanism and an automatic winding mechanism.
  • the automatic winding mechanism includes an arc Shape winding mechanism and pressure roller; the cutter mechanism and pressure roller are both installed on the frame; the pressure roller is pressed against the winding shaft of the winding station by elastic parts; at least one end of the double-station winding mechanism
  • An arc-shaped rewinding mechanism is provided on the frame of the upper part, and the cutter mechanism and the arc-shaped rewinding mechanism are located outside the double-station rewinding mechanism and are respectively located on both sides of the sheet on the double-station rewinding mechanism;
  • the winding mechanism and the winding shaft of the winding station are attached or separated and matched; when the arc winding mechanism is attached to the winding shaft of the winding station, the opening of the arc winding mechanism corresponds to the pressure roller, and the arc shape
  • the purpose of the present invention is to provide a rewinding and rewinding device for automatic film cutting, which ensures that the film cut surface is neat, does not appear wrinkles, has a simple structure, and effectively improves film production quality.
  • a film automatic cutting rewinding and changing device comprising a frame, a double-station winding mechanism rotatably installed on the frame, a pressing roller mechanism and A control mechanism for controlling the actions of the double-station winding mechanism and the pressing roller mechanism;
  • the double-station winding mechanism includes two rotating shafts, two central turntables, two winding shafts and two guide rollers;
  • the rotating shafts are rotatably Connected to the frame, the two central turntables are respectively arranged at the end of the rotating shaft away from the frame, and the two central turntable disk surfaces are parallel to each other;
  • the central turntable disk surface is provided with a winding station and an unloading station in the same straight line
  • the station, the winding station and the unwinding station are symmetrical about the rotating shaft; the two ends of the two winding shafts are respectively connected to the central turntable by the first bearing, and the two winding shafts are parallel to the rotating shaft and are located at the winding shaft.
  • the rewinding shaft of the rewinding station is matched with the rewinding shaft of the unwinding station to switch positions; the two ends of the guide roller are respectively rotatably installed on two central turntables, and the guide rollers are set Between the two winding shafts, and the guide rollers are parallel to the rotating shaft, and are installed symmetrically on both sides of the rotating shaft; the central turntable is also provided with an electrofusion knife mechanism, the electrofusion knife mechanism includes two, respectively The winding shafts are installed corresponding to each other.
  • the electrofusion knife mechanism includes a first swing arm, a rotating shaft, and a first transmission mechanism.
  • the first swing arm includes two, which are respectively arranged on the opposite disk surfaces of the two central turntables, and one end of the first swing arm is connected to The other end of the center turntable is rotatably connected to the end of the rotating shaft; the rotating shaft is arranged between the two center turntables in a direction parallel to the winding shaft, and the rotating shaft is provided with an alloy wire parallel to the rotating shaft.
  • the first transmission mechanism is connected to the first swing arm, and the first transmission mechanism is electrically connected to the control mechanism
  • the pressure roller mechanism is installed between two central turntables, the pressure roller mechanism includes a pressure roller parallel to the winding shaft, a second swing arm and a second transmission mechanism; the second swing arm includes two, second The swing arms are respectively arranged at both ends of the pressure roller, and one end of the second swing arm is connected to the pressure roller, and the other end is connected to the frame; the second transmission mechanism is connected to the first swing arm, and the second transmission mechanism is electrically connected to the control Mechanism;
  • the electrofusion knife mechanism is used to cut the film, and the pressure roller mechanism is used to squeeze and attach the cut film to the winding shaft.
  • the specific film rewinding and rewinding process for automatic film cutting is as follows: when the control mechanism senses that the curled film length of the rewinding shaft on the rewinding station reaches the set value of full roll, first control the central turntable to rotate to make the rewinding station.
  • the rewinding shaft on the upper and the rewinding shaft of the unwinding station are switched positions, and the pressing roller mechanism and the electrofusion knife mechanism corresponding to the rewinding shaft on the rewinding station are respectively located on the rewinding station.
  • control to start the electrofusion knife mechanism installed corresponding to the rewinding shaft on the rewinding station the alloy wire of the electrofusion knife mechanism starts to heat, and the first transmission mechanism drives the first swing arm and connects to the first The rotating shaft of a swing arm rotates so that the alloy wire being heated on the rotating shaft is close to the film to be cut on the surface of the winding shaft at the winding station; again, the second transmission mechanism is controlled to start, and the second transmission mechanism drives and drives The second swing arm rotates, and then drives the pressure roller to attach the film to be cut on the surface of the winding shaft on the winding station to the winding shaft and the heating alloy wire on the winding station respectively; finally, the winding worker The film to be cut on the surface of the winding shaft is cut by the high temperature alloy wire and squeezed by the pressure roller and attached to the surface of the winding shaft on the winding station.
  • the control mechanism controls the electrofusion knife mechanism and the second transmission mechanism to return To the set position before the control is activated.
  • two mounting supports installed at intervals are provided on the rotating shaft, and the two mounting supports are parallel to each other and are installed correspondingly;
  • the end of the mounting support away from the rotating shaft is provided with an alloy wire mounting part, the
  • the alloy wire installation part includes coaxially arranged adjusting bolts, insulating sleeves and alloy wire fixing sleeves;
  • the alloy wire is arranged between two installation supports, and two ends of the alloy wire are respectively connected to the alloy wire installation parts;
  • the end of the mounting support away from the rotating shaft is provided with a through hole, the central axis of the through hole is parallel to the rotating shaft, and the inner wall of the through hole is provided with threads;
  • the adjusting bolt is adapted to the through hole, and the adjusting bolt is close to the opposite side.
  • the direction adjacent to the mounting support passes through the through hole, and the end of the adjusting bolt passing through the through hole is connected to the insulating sleeve; the end of the insulating sleeve away from the adjusting bolt is connected to the alloy wire fixing sleeve, and the alloy wire is fixed
  • the sleeve is fixedly connected to the end of the alloy wire; it is used to safely heat the alloy wire and ensure that the entire alloy wire moves synchronously with the rotating shaft.
  • the alloy wire mounting portion further includes a tension spring, the tension spring is arranged between the adjusting bolt and the insulating sleeve, and one end of the tension spring is connected to the end of the adjusting bolt passing through the through hole, and the other end It is connected to the end of the insulating sleeve close to the adjusting bolt; the tension spring is used to adjust the tightness of the alloy wire between the two mounting supports.
  • the mounting support is detachably connected to the rotating shaft, which is convenient to adjust the distance between the two mounting supports, and cooperates with the winding shaft to rewind films of different widths.
  • the first transmission mechanism is configured as a first cylinder, and the first cylinder includes a first cylinder base and a first cylinder telescopic rod installed on the surface of the central turntable, one end of the first cylinder telescopic rod is connected to the first cylinder base, The other end is connected to the first swing arm;
  • the second transmission mechanism is set as a second cylinder, the second cylinder includes a second cylinder seat and a second cylinder telescopic rod installed on the frame, one end of the second cylinder telescopic rod is connected to The other end of the second cylinder seat is connected to the second swing arm; the transmission structure is simple to install and easy to operate.
  • the alloy wire is connected to the control mechanism by a contactor, and the first cylinder and the second cylinder are respectively connected to the control mechanism by solenoid valves; the control mechanism controls the heating of the alloy wire by controlling the opening and closing of the contactor, and controls the electromagnetic
  • the on-off of the valve controls the working state of the first cylinder and the second cylinder, avoids complicated control processes, and facilitates the operation and maintenance of the rewinding and rewinding device that automatically cuts the film.
  • the winding and changing device for automatic film cutting disclosed in the present invention includes a frame, a double-station winding mechanism, a pressing roller mechanism, an electrofusion knife mechanism and a control mechanism; the double-station winding mechanism and the pressing roller mechanism are arranged on the machine On the frame, the pressure roller is arranged in parallel with the winding shaft of the winding station.
  • the electrofusion knife mechanism is set on the central turntable of the double station winding mechanism, and the winding shaft is equipped with an electrofusion knife mechanism; the electrofusion knife mechanism is selected Electrically heated alloy wire, the alloy wire is arranged parallel to the winding shaft, and the length of the alloy wire is at least equal to the width of the film to be cut on the winding shaft surface at the winding station; the pressure roller is attached or separated from the winding shaft at the winding station Cooperate, the alloy wire of the electrofusion knife mechanism is close to or far away from the winding shaft of the winding station.
  • the film length of the winding shaft on the winding station reaches the set value of the full roll, the winding shaft on the winding station Switch position with the winding shaft of the unwinding station.
  • the pressing roller mechanism and the electrofusion knife mechanism are respectively arranged on the two sides of the film thickness direction to be laminated and cut on the winding shaft surface of the winding station.
  • the electrofusion knife mechanism When the alloy wire is close to the winding shaft of the winding station, the pressure roller will stick the film to be cut on the winding shaft surface on the winding station to the winding shaft and the high temperature alloy wire on the winding station to cut the film The cut film is attached to the surface of the winding shaft on the winding station.
  • the invention adopts a simple mechanical structure, under the premise of not interrupting the operation of the winding and changing device, simultaneously realizes the automatic cutting and rapid winding of the film, high automation, reliable operation, safe use, reducing the process and cost, and improving Production efficiency; the present invention avoids pollution to the surface of the winding shaft, keeps the surface of the winding shaft clean, and is beneficial to the reuse of the winding shaft; in addition, the high-temperature alloy wire can cut the film instantly, and the press rolls the film while cutting Attached to the rewinding shaft of the rewinding station, there will be no situation that the cut film cannot be attached to the surface of the rewinding shaft, and the alloy wire of the present invention is installed on the rotating shaft, and the whole alloy wire runs synchronously with the rotating shaft to ensure The cut surface of the alloy wire to the film is neat, without wrinkles, and the film winding quality; the length of the alloy wire can be adjusted, so it is suitable for automatic cutting, winding and changing of films of different widths.
  • the winding and changing device for automatic film cutting of the present invention has simple structure, low production cost, ingenious design, simple control and operation, and is easy to install, maintain and promote.
  • Figure 1 is a structural diagram of the winding state of the winding and changing device for automatic film cutting of the present invention
  • Figure 2 is a structural diagram of the rewinding and rewinding device for automatic film cutting of the present invention
  • FIG. 3 is a specific structure diagram of the electrosurgical knife mechanism of the invention.
  • Figure 4 is a control flow chart of the control mechanism of the present invention.
  • the present invention aims to provide a The rewinding and rewinding device for automatic film cutting has simple structure, easy operation, high automation, and the cut surface of the film is neat, without wrinkles, and the rewinding quality is high.
  • a winding and changing device for automatic film cutting includes a frame 1, a double-station winding mechanism 2 rotatably mounted on the frame 1, an electrofusion knife mechanism 3,
  • the pressure roller mechanism 4, the control mechanism 5 used to control the actions of the double-station winding mechanism 2 and the pressure roller mechanism 4, the control mechanism 5 generally adopts a PLC control system;
  • the double-station winding mechanism 2 includes two shafts 2.1 , Two central turntables 2.2, two winding shafts 2.3 and two guide rollers 2.4; wherein the rotating shaft 2.1 is rotatably connected to the frame 1, and the two central rotating disks 2.2 are respectively arranged at the end of the rotating shaft 2.1 away from the frame 1.
  • the two central turntables 2.2 are parallel to each other.
  • the central turntable 2.2 rotates on the frame 1 through the shaft 2.1; the central turntable 2.2 is provided with a winding station and an unloading station located in the same straight line on the disk surface.
  • the station and the unwinding station are symmetrical about the rotating shaft 2.1; the two ends of the two rewinding shafts 2.3 are respectively connected to the two central turntables 2.2 by a first bearing 2.5, and the two reeling shafts 2.3 are both parallel to the rotating shaft 2.1 and respectively Set on the winding station and the unwinding station; the central turntable 2.2 rotates so that the winding shaft 2.3 of the winding station and the winding shaft 2.3 of the unwinding station are switched in position; the two ends of the guide roller 2.4 can be rotated respectively
  • the guide roller 2.4 is installed between the two reeling shafts 2.3, and the guide roller 2.3 is parallel to the rotating shaft 2.1, and is installed symmetrically on both sides of the rotating shaft 2.1 for the rewinding station.
  • the electrofusion knife mechanism 3 is arranged on the surface of the central turntable 2.2, and the electrofusion knife mechanism 3 includes two, respectively, which are installed corresponding to the rewinding shaft 2.3 on the rewinding station and the unwinding station.
  • the electrofusion knife mechanism 3 includes a first swing arm 3.1, a rotating shaft 3.2, and a first transmission mechanism 3.5;
  • the first swing arm 3.1 includes two, which are respectively arranged on the opposite disk surfaces of the two central turntables 2.2, and the first swing arm 3.1
  • One end of the arm 3.1 is rotatably connected to the central turntable 2.2, and the other end is rotatably connected to the end of the rotating shaft 3.2 using a second bearing 3.10;
  • the rotating shaft 3.2 is arranged between the two central turntables 2.2 in a direction parallel to the winding shaft 2.3.
  • the width of the first transmission mechanism 3.5 is connected to the first swing arm 3.1, and the first transmission mechanism 3.5 is electrically connected to the control mechanism 5.
  • the first transmission mechanism 3.5 uses the first cylinder, the first cylinder including the installation in the center The first cylinder seat and the first cylinder telescopic rod on the disc surface of the turntable 2.2, one end of the first cylinder telescopic rod is connected to the first cylinder seat, and the other end is connected to the first swing arm 3.1; the control mechanism 5 controls and rewinds the station
  • the reel shaft 2.3 corresponds to the first cylinder telescopic rod in the electrofusion knife mechanism 3 installed to expand and contract, driving the first swing arm 3.1 to swing, and the first swing arm 3.1 drives the rotating shaft 3.2 to rotate, so that the alloy wire 3.3 on the rotating shaft 3.2 approaches or Keep away from the film 6 to be cut on the surface of the winding shaft 2.3 on the winding station.
  • the pressure roller mechanism 4 is installed between two central turntables 2.2, and the pressure roller mechanism 4 includes a pressure roller 4.1, a second swing arm 4.2, and a second transmission mechanism 4.3 that are parallel to the winding shaft 2.3; the second swing arm 4.2 consists of two, which are respectively arranged at the axial ends of the pressure roller 4.1.
  • the second transmission mechanism 4.3 is generally set as a second cylinder, and the second cylinder includes a second cylinder seat installed on the frame 1 and a second cylinder telescopic rod, One end of the telescopic rod of the second cylinder is connected to the second cylinder base, and the other end is connected to the second swing arm 4.2; the control mechanism 5 controls the telescopic rod of the second cylinder to extend and retract to drive the second swing arm 4.2 to rotate around its fixed point with the frame 1.
  • the specific installation structure of the alloy wire 3.3 on the rotating shaft 3.2 is as follows.
  • the rotating shaft 3.2 is provided with two mounting supports 3.4 installed at intervals.
  • the two mounting supports 3.4 are parallel to each other and installed correspondingly; the end of the mounting support 3.4 away from the rotating shaft 3.2 is provided with an alloy wire mounting portion, the alloy wire mounting portion includes a coaxially arranged adjusting bolt 3.6 and an insulating sleeve 3.7 and the alloy wire fixing sleeve 3.8; the alloy wire 3.3 is arranged between the two installation supports 3.4, and the two ends of the alloy wire 3.3 are respectively connected to the alloy wire installation part; the installation support 3.4 is far away from the rotating shaft 3.2
  • the end is provided with a through hole, the central axis of the through hole is parallel to the rotating shaft 3.2, and the inner wall of the through hole is provided with threads; the adjusting bolt 3.6 is adapted to the through hole, and the adjusting bolt 3.6 is close to the adjacent mounting support
  • the direction of 3.4 passes through the through hole, and the end of the adjusting bolt 3.6 passing through the through hole is connected to the insulating sleeve 3.7; the end of the
  • a tension spring 3.9 and a tension spring 3.9 are set between the adjusting bolt 3.6 and the insulating sleeve 3.7 of the alloy wire mounting part.
  • One end is connected to the end of the adjusting bolt 3.6 passing through the through hole, and the other end is connected to the end of the insulating sleeve 3.7 close to the adjusting bolt 3.6.
  • the tension spring 3.9 is used to adjust the alloy wire 3.3 between the two mounting supports 3.4. The degree of tightness makes the alloy wire 3.3 always remain parallel to the rotating shaft 3.2, ensuring the cutting effect of the alloy wire 3.3 on the film 6.
  • the film 6 rewinding device for automatic film cutting since the film 6 rewinding device for automatic film cutting is different in width on the production line, the length of the alloy wire used to cut the film 6 only needs to be able to cut the length of the film 6.
  • the structure of the transmission mechanism in the automatic film cutting rewinding and rewinding device of the present invention is simple, and the first cylinder and the second cylinder are respectively connected to the control mechanism 5 by solenoid valves, and the control mechanism 5 controls the alloy by controlling the opening and closing of the contactor.
  • the heating of the wire 3.3, the on-off control of the solenoid valve controls the working status of the first cylinder and the second cylinder, avoiding the use of complex control processes to control the film 6 cutting and changing the roll, the design is clever, easy to install, and is beneficial to the automatic film of the present invention. Operation, maintenance and promotion of the cut-off winding and changing device.
  • the winding and rewinding process of the automatic film cutting of the present invention is described specifically as follows: on the film 6 production line, the film 6 passes through the traction roller 7, the guide roller 2.4, the tension roller 8, and the floating roller in sequence. 9. After the guide roller 2.4 and the contact roller 10 are wound on the winding shaft 2.3 of the winding station in the double-station winding mechanism 2, the winding shaft 2.3 rotates to continuously wind the film 6; when the control mechanism 5 senses When the winding shaft 2.3 on the winding station reaches the full roll setting value, the central turntable 2.2 is controlled to rotate.
  • the central turntable 2.2 is usually close
  • the pressure roller mechanism 4 rotates 180° on the side to make the winding shaft .3 on the winding station and the winding shaft 2.3 of the unwinding station switch positions, so that the pressure roller mechanism 4 and the electric power corresponding to the winding shaft 2.3 on the winding station
  • the fusing mechanism 3 is respectively located on both sides of the thickness direction of the film 6 to be cut on the surface of the winding shaft 2.3 on the winding station;
  • the control mechanism 5 controls to start the electrofusion knife installed corresponding to the winding shaft 2.3 on the winding station Mechanism 3, the contactor is closed, the solenoid valve connected to the first cylinder is turned on, the alloy wire 3.3 starts to heat, the first cylinder starts, and the telescopic rod of the first cylinder extends to drive the first swing arm 3.1 and connect to the first swing arm 3.1
  • the rotating shaft 3.2 rotates so that the alloy wire 3.3 being heated on the rotating shaft 3.2 is close to
  • the control mechanism 5 disconnects the contactor that controls the heating of the alloy wire 3.3, and disconnects
  • the solenoid valve connected with the first and second cylinders, the telescopic rod of the first cylinder and the telescopic rod of the second cylinder retract to bring the alloy wire on the rotating shaft 3.2 and the pressure roller 4.1 back to the setting position before the control mechanism 5 controls the start .

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  • Replacement Of Web Rolls (AREA)

Abstract

一种薄膜自动切断的收卷换卷装置，包括机架（1）、设置在机架上的双工位收卷机构（2）、电融刀机构（3）、压辊机构（4）和控制机构（5）；双工位收卷机构包括转轴（2.1）、中心转盘（2.2）、收卷轴（2.3）和导向辊（2.4），压辊机构包括压辊（4.1），压辊与收卷工位的收卷轴平行，电融刀机构设置在中心转盘上，电融刀机构包括电加热的合金丝（3.3）；当收卷工位上的收卷轴卷曲的薄膜长度达到满卷设定值时，收卷工位收卷轴与卸卷工位收卷轴切换位置，合金丝先靠近收卷工位的收卷轴，压辊将收卷工位上的收卷轴表面待贴合切断的薄膜分别贴合于收卷工位上的收卷轴和高温合金丝，切断薄膜并将切断后的薄膜贴附至收卷工位上的收卷轴表面。该收卷换卷装置结构简单，薄膜的切断面整齐，收卷质量高。

Description

一种薄膜自动切断的收卷换卷装置 技术领域
本发明涉及薄膜生产领域，具体涉及一种薄膜自动切断的收卷换卷装置。
背景技术
目前所知有两种薄膜切断装置系统，一种是机械摆臂式的薄膜切断刀，其控制方式是用电磁阀来控制气流方向从而通过气缸来控制摆臂打断刀的动作和速度，其特点是结构简单。而缺点是经常无法切断薄膜，尤其是在薄膜张力较小的情况下，不能满足工艺要求。另外一种是运行在轨道上的薄膜切断刀，其控制方式是用伺服电机来控制切断刀往复运动来切断薄膜，其特点是运行速度快，即使是在薄膜张力较小的情况下也可以轻松切断薄膜，而缺点是经常会出现薄膜切面不齐，薄膜有皱褶，对薄膜的质量有影响。
例如专利CN104528434B公开了一种自动收卷换卷装置，包括机架、双工位收卷机构和自动换卷机构，自动换卷机构包括切刀机构和自动上卷机构，自动上卷机构包括弧形上卷机构和压辊；切刀机构和压辊均设在机架上；压辊通过弹性部件顶紧而压在收卷工位的收卷轴上；双工位收卷机构的至少一个端部的机架上设有一个弧形上卷机构，切刀机构和弧形上卷机构位于双工位收卷机构外面且分别位于双工位收卷机构上的片材的两侧；弧形上卷机构与收卷工位的收卷轴贴合或分离配合；当弧形上卷机构与收卷工位的收卷轴贴合时，弧形上卷机构的开口与压辊相对应，弧形上卷机构的导入端与经过的片材相接触，弧形上卷机构的导入端与收卷工位的收卷轴之间形成剪切空间；切刀机构伸入或退出剪切空间；该专利公开的自动换卷机构结构复杂，对各安装零部件的制造及安装精度要求高，且由于薄膜不能瞬间全部切断，因此可能会产生切断后的薄膜不能贴附在收卷轴表面的情况。
发明内容
本发明目的在于提供一种薄膜自动切断的收卷换卷装置，保证薄膜切面整齐，不出现皱褶，结构简单，有效的提高薄膜生产质量。
为达成上述目的，本发明提出如下技术方案：一种薄膜自动切断的收卷换卷装置，包括机架、可转动地安装在机架上的双工位收卷机构、压辊机构和用于控制双工位收卷机构和压辊机构动作的控制机构；所述双工位收卷机构包括两根转轴、两个中心转盘、两根收卷轴和两根导向辊；所述转轴可转动地连接于机架，所述两个中心转盘分别设置在转轴远离机架的端部，且两个中心转盘盘面相互平行；所述中心转盘盘面上设置有位于同一直线的收卷工位和卸卷工位，收卷工位和卸卷工位关于转轴对称；所述两根收卷轴的两端分别采用第一轴承转动连接于中心转盘，两根收卷轴均平行于转轴，且分别位于收卷工位和卸卷工位上，收卷工位的收卷轴与卸卷工位的收卷轴切换位置配合；所述导向辊的两端分别可转动地安装在两个中心转盘上，导向辊设置在于两根收卷轴之间，且导向辊平行于转轴，并对称安装于转轴的两侧；所述中心转盘盘面上还设置有电融刀机构，所述电融刀机构包括两个，分别与收卷轴相互对应安装。
所述电融刀机构包括第一摆臂、旋转轴和第一传动机构，所述第一摆臂包括两个，分别设置在两个中心转盘相对的盘面上，且第一摆臂一端连接于中心转盘，另一端转动连接于旋转轴端部；所述旋转轴沿平行于收卷轴方向设置在两个中心转盘之间，旋转轴上设置有平行于旋转轴的合金丝，所述合金丝电连接于控制机构，且合金丝的长度至少等于收卷工位上收卷轴表面待切断的薄膜的宽度；所述第一传动机构连接于第一摆臂，且第一传动机构电连接于控制机构；所述压辊机构安装在两个中心转盘之间，压辊机构包括对应平行于收卷轴的压辊、第二摆臂和第二传动机构；所述第二摆臂包括两个，第二摆臂分别设置在压辊两端，且第二摆臂一端连接于压辊，另一端连接于机架；所述第二传动机构连接于第一摆臂，且第二传动机构电连接于控制机构；所述，电融刀机构用于切断薄膜，压辊机构用于将切断后的薄膜挤压贴附于收卷轴上。
具体薄膜自动切断的收卷换卷过程为，当所述控制机构感应到收卷工位上的收卷轴卷曲的薄膜长度达到满卷设定值时，首先控制中心转盘转动，使得收卷工位上的收卷轴与卸卷工位的收卷轴切换位置，压辊机构和与收卷工位上收卷轴对应的电融刀机构分别位于收卷工位上收卷轴表面待贴合切断的薄膜厚度方向的两侧；其次，控制启动与收卷工位上收卷轴对应安装的电融刀机构，电融刀机构的合金丝开始加热，第一传动机构传动，带动第一摆臂和连接于第一摆臂的旋转轴旋转，使得旋转轴上正在加热的合金丝靠近于收卷工位上收卷轴表面待贴合切断的薄膜；再次，控制启动第二传动机构，第二传动机构传动，带动第二摆臂旋转，进而带动压辊将收卷工位上的收卷轴表面待贴合切断的薄膜分别贴合于收卷工位上的收卷轴和正在加热的合金丝；最后，收卷工位上的收卷轴表面待贴合切断的薄膜被高温合金丝切断后经压辊挤压并贴合于收卷工位上的收卷轴表面，控制机构控制电融刀机构和第二传动机构返回至控制启动前的设定位置。
进一步的，所述旋转轴上设置有间隔安装的两根安装支座，两根安装支座相互平行且对应安装；所述安装支座远离旋转轴的端部设置有合金丝安装部，所述合金丝安装部包括同轴设置的调节螺栓、绝缘套和合金丝固定套；所述合金丝设置在两根安装支座之间，且合金丝的两端分别连接于合金丝安装部；所述安装支座远离旋转轴的端部设置有通孔，所述通孔的中心轴线平行于旋转轴，且通孔的内壁设置有螺纹；所述调节螺栓与通孔适配，调节螺栓沿靠近相邻安装支座的方向穿出于通孔，且调节螺栓穿出于通孔的端部连接于绝缘套；所述绝缘套远离调节螺栓的端部连接于合金丝固定套，所述合金丝固定套固连于合金丝端部；用于给合金丝安全加热，并保证合金丝整体与旋转轴同步运动。
进一步的，所述合金丝安装部还包括张紧弹簧，所述张紧弹簧设置在调节螺栓和绝缘套之间，且张紧弹簧一端连接于调节螺栓穿出于通孔的端部，另一端连接于绝缘套靠近调节螺栓的端部；所述张紧弹簧用于调节两根安装支座之间合金丝的松紧程度。
进一步的，所述安装支座可拆卸连接于旋转轴，便于调节两根安装支座之间的距离，配合收卷轴收卷不同宽度的薄膜。
进一步的，所述第一传动机构设置为第一气缸，第一气缸包括安装在中心转盘盘面上的第一气缸座和第一气缸伸缩杆，第一气缸伸缩杆一端连接于第一气缸座，另一端连接于第一摆臂；所述第二传动机构设置为第二气缸，第二气缸包括安装在机架上的第二气缸座和第二气缸伸缩杆，第二气缸伸缩杆一端连接于第二气缸座，另一端连接于第二摆臂；传动结构安装简单，操作方便。
进一步的，所述合金丝采用接触器连接于控制机构，所述第一气缸和第二气缸分别采用电磁阀连接于控制机构；控制机构通过控制接触器的开合控制合金丝的加热，控制电磁阀的通断控制第一气缸和第二气缸的工作状态，避免复杂的控制过程，有利于薄膜自动切断的收卷换卷装置的操作和检修。
由以上技术方案可知，本发明的技术方案提供的薄膜自动切断的收卷换卷装置，获得了如下有益效果：
本发明公开的薄膜自动切断的收卷换卷装置，包括机架、双工位收卷机构、压辊机构、电融刀机构和控制机构；双工位收卷机构和压辊机构设置在机架上，压辊与收卷工位的收卷轴平行设置，电融刀机构设置在双工位收卷机构的中心转盘上，且收卷轴各对应安装一个电融刀机构；电融刀机构选用电加热的合金丝，合金丝与收卷轴平行设置，且合金丝的长度至少等于收卷工位上收卷轴表面待切断的薄膜的宽度；压辊与收卷工位的收卷轴贴合或分离配合，电融刀机构的合金丝与收卷工位的收卷轴靠近或远离，当收卷工位上的收卷轴卷曲的薄膜长度达到满卷设定值时，收卷工位上的收卷轴与卸卷工位的收卷轴切换位置，此时，压辊机构和电融刀机构分别设置在收卷工位上的收卷轴表面待贴合切断的薄膜厚度方向的两侧，电融刀机构的合金丝靠近收卷工位的收卷轴时，压辊将收卷工位上的收卷轴表面待贴合切断的薄膜分别贴合于收卷工位上的收卷轴和高温合金丝，切断薄膜并将切断后的薄膜贴附至收卷工位上的收卷轴表面。
本发明采用简单的机械结构，在不打断收卷换卷装置运行的前提下，同时 实现薄膜的自动切断和快速上卷，自动化程度高、运行可靠、使用安全，减少了工序和成本，提高生产效率；本发明避免了对收卷轴的表面造成污染，使收卷轴的表面保持干净，有利于收卷轴的再利用；此外，高温合金丝可以瞬间切断薄膜，压辊在切断的同时将薄膜贴附在收卷工位的收卷轴上，不会产生切断后的薄膜不能贴附在收卷轴表面的情况，并且本发明的合金丝安装在旋转轴上，合金丝整体与旋转轴同步运行，保证合金丝对薄膜的切断面整齐，无皱褶，薄膜收卷质量；所述合金丝长度可以调节，因此适用于不同宽度薄膜的自动切断和收卷换卷。
另外，本发明的薄膜自动切断的收卷换卷装置结构简单、生产成本低，设计巧妙、控制操作简单、易于安装、维护及推广。
应当理解，前述构思以及在下面更加详细地描述的额外构思的所有组合只要在这样的构思不相互矛盾的情况下都可以被视为本公开的发明主题的一部分。
结合附图从下面的描述中可以更加全面地理解本发明教导的前述和其他方面、实施例和特征。本发明的其他附加方面例如示例性实施方式的特征和/或有益效果将在下面的描述中显见，或通过根据本发明教导的具体实施方式的实践中得知。
附图说明
附图不意在按比例绘制。在附图中，在各个图中示出的每个相同或近似相同的组成部分可以用相同的标号表示。为了清晰起见，在每个图中，并非每个组成部分均被标记。现在，将通过例子并参考附图来描述本发明的各个方面的实施例，其中：
图1为本发明薄膜自动切断的收卷换卷装置收卷状态结构图；
图2为本发明薄膜自动切断的收卷换卷装置换卷状态结构图；
图3为本发明电融刀机构具体结构图；
图4为本发明控制机构控制流程图。
图中，各标记的具体意义为：
1-机架，2-双工位收卷机构，2.1-转轴，2.2-中心转盘，2.3-收卷轴，2.4-导向辊，2.5-第一轴承，3-电融刀机构，3.1-第一摆臂，3.2-旋转轴，3.3-合金丝，3.4-安装支座，3.5-第一传动机构，3.6-调节螺栓，3.7-绝缘套，3.8-合金丝固定套，3.9-张紧弹簧，3.10-第二轴承，4-压辊机构，4.1-压辊，4.2-第二摆臂，4.3-第二传动机构，5-控制机构，6-薄膜，7-牵引辊，8-张力辊，9-浮动辊，10-接触辊。
具体实施方式
为了更了解本发明的技术内容，特举具体实施例并配合所附图式说明如下。
在本公开中参照附图来描述本发明的各方面，附图中示出了许多说明的实施例。本公开的实施例不定义包括本发明的所有方面。应当理解，上面介绍的多种构思和实施例，以及下面更加详细地描述的那些构思和实施方式可以以很多方式中任意一种来实施，这是因为本发明所公开的构思和实施例并不限于任何实施方式。另外，本发明公开的一些方面可以单独使用，或者与本发明公开的其他方面的任何适当组合来使用。
基于现有技术中的薄膜收卷时的切断装置结构复杂，收卷轴上薄膜满卷切断时经常出现薄膜切面不齐，薄膜有皱褶，影响薄膜收卷质量，因此本发明旨在提出一种薄膜自动切断的收卷换卷装置，结构简单，易于操作，自动化程度高，并且薄膜的切断面整齐，无褶皱，收卷质量高。
下面结合附图所示的实施例，对本发明公开的薄膜自动切断的收卷换卷装置作进一步具体介绍。
结合图1和图2所示，一种薄膜自动切断的收卷换卷装置，包括机架1、可转动地安装在机架1上的双工位收卷机构2、电融刀机构3、压辊机构4、用于控制双工位收卷机构2和压辊机构4动作的控制机构5，控制机构5一般采用PLC控制系统；所述双工位收卷机构2包两根括转轴2.1、两个中心转盘2.2、两根收卷轴2.3和两根导向辊2.4；其中，转轴2.1可转动地连接于机架1，所述 两个中心转盘2.2分别设置在转轴2.1远离机架1的端部，且两个中心转盘2.2盘面相互平行，中心转盘2.2通过转轴2.1在机架1上转动；所述中心转盘2.2盘面上设置有位于同一直线的收卷工位和卸卷工位，收卷工位和卸卷工位关于转轴2.1对称；所述两根收卷轴2.3的两端分别与两个中心转盘2.2采用第一轴承2.5转动连接，两根收卷轴2.3均平行于转轴2.1，且分别设置在收卷工位和卸卷工位上；中心转盘2.2转动使得收卷工位的收卷轴2.3与卸卷工位的收卷轴2.3切换位置配合；所述导向辊2.4的两端分别可转动地安装在两个中心转盘2.2上，导向辊2.4设置在于两根收卷轴2.3之间，且导向辊2.3平行于转轴2.1，并对称安装于转轴2.1的两侧，用于收卷工位的收卷轴2.3与卸卷工位的收卷轴2.3切换位置时对薄膜6导向，并支撑薄膜6平展。
所述电融刀机构3设置在中心转盘2.2盘面上，所述电融刀机构3包括两个，分别与收卷工位、卸卷工位上的收卷轴2.3相互对应安装。电融刀机构3包括第一摆臂3.1、旋转轴3.2和第一传动机构3.5；所述第一摆臂3.1包括两个，分别设置在两个中心转盘2.2相对的盘面上，且第一摆臂3.1一端转动连接于中心转盘2.2，另一端采用第二轴承3.10转动连接于旋转轴3.2端部；所述旋转轴3.2沿平行于收卷轴2.3方向设置在两个中心转盘2.2之间，旋转轴3.2上设置有平行于旋转轴3.2的合金丝3.3；所述合金丝3.3采用接触器电连接于控制机构5，且合金丝3.3的长度至少等于收卷工位上收卷轴2.3表面待切断的薄膜的宽度；所述第一传动机构3.5连接于第一摆臂3.1，且第一传动机构3.5电连接于控制机构5，通常，第一传动机构3.5选用第一气缸，第一气缸包括安装在中心转盘2.2盘面上的第一气缸座和第一气缸伸缩杆，第一气缸伸缩杆一端连接于第一气缸座，另一端连接于第一摆臂3.1；控制机构5通过控制与收卷工位上收卷轴2.3对应安装的电融刀机构3中的第一气缸伸缩杆伸缩，带动第一摆臂3.1摆动，第一摆臂3.1带动旋转轴3.2转动，使得旋转轴3.2上的合金丝3.3靠近或远离收卷工位上收卷轴2.3表面待贴合切断的薄膜6。
所述压辊机构4安装在两个中心转盘2.2之间，压辊机构4包括对应平行于 收卷轴2.3的压辊4.1、第二摆臂4.2和第二传动机构4.3；所述第二摆臂4.2包括两个，分别设置在压辊4.1轴向两端，第二摆臂4.2一端连接于压辊4.1，另一端转动连接于机架4.1；所述第二传动机构4.3连接于第二摆臂，且第二传动机构4.3电连接于控制机构5；所述第二传动机构4.3一般设置为第二气缸，第二气缸包括安装在机架1上的第二气缸座和第二气缸伸缩杆，第二气缸伸缩杆一端连接于第二气缸座，另一端连接于第二摆臂4.2；控制机构5通过控制第二气缸伸缩杆伸缩，带动第二摆臂4.2绕其与机架1固定点旋转，使得固定在第二摆臂4.2远离固定点端部的压辊4.1贴合或远离收卷工位上的收卷轴2.3，当压辊4.1贴合收卷工位上的收卷轴2.3时，将收卷工位上的收卷轴2.3表面待贴合切断的薄膜6分别贴合于收卷工位上的收卷轴2.3和加热的合金丝，完成换卷。
结合图3所示，为保证电融刀机构3上合金丝3.3正常电加热，合金丝3.3在旋转轴3.2上的具体安装结构如下，旋转轴3.2上设置有间隔安装的两根安装支座3.4，两根安装支座3.4相互平行且对应安装；所述安装支座3.4远离旋转轴3.2的端部设置有合金丝安装部，所述合金丝安装部包括同轴设置的调节螺栓3.6、绝缘套3.7和合金丝固定套3.8；所述合金丝3.3设置在两根安装支座3.4之间，且合金丝3.3的两端分别连接于合金丝安装部；所述安装支座3.4远离旋转轴3.2的端部设置有通孔，所述通孔的中心轴线平行于旋转轴3.2，且通孔的内壁设置有螺纹；所述调节螺栓3.6与通孔适配，调节螺栓3.6沿靠近相邻安装支座3.4的方向穿出于通孔，且调节螺栓3.6穿出于通孔的端部连接于绝缘套3.7；所述绝缘套3.7远离调节螺栓3.6的端部连接于合金丝固定套3.8，所述合金丝固定套3.8固连于合金丝3.3端部；合金丝3.3经合金丝固定套3.8、绝缘套3.7的依次固定，使得合金丝3.3在控制机构5控制接触器闭合时能安全固定并加热；同时，由于合金丝3.3是与旋转轴3.3相对固定，当旋转轴3.2转动，合金丝3.3与旋转轴3.2整体同步转动，不会出现合金丝3.3端部滞后的现象，因此当合金丝3.3被加热后与带切断的薄膜6表面接触时，可以瞬间切断薄膜6，保证端面整齐，不产生褶皱；并且旋转轴3.2的转动只需要设置一个第一传动机构3.5， 有效节省装置成本。
此外，为保证合金丝3.3在使用过程中始终保持与旋转轴3.2平行的状态，还在所述合金丝安装部的调节螺栓3.6和绝缘套3.7之间设置了张紧弹簧3.9，张紧弹簧3.9一端连接于调节螺栓3.6穿出于通孔的端部，另一端连接于绝缘套3.7靠近调节螺栓3.6的端部，张紧弹簧3.9用于时刻调节两根安装支座3.4之间合金丝3.3的松紧程度，使得合金丝3.3始终保持与旋转轴3.2平行的状态，保证合金丝3.3对薄膜6的切断效果。
结合具体实施例，由于薄膜自动切断的收卷换卷装置在生产线上收卷的薄膜6宽度不同，用于切断薄膜6的合金丝的长度只需要能切断薄膜6的长度即可，采用将安装支座3.4与旋转轴3.2可拆卸连接的方式，调节旋转轴3.2上两根安装支座3.4之间的距离，进而调节合金丝3.3的工作长度，适配于自动切断、收换卷不同宽度的薄膜6，该方法一方面减少电耗，另一方面保证薄膜自动切断的收卷换卷装置的操作安全。
本发明的薄膜自动切断的收卷换卷装置中传动机构结构简单，并且所述第一气缸和第二气缸分别采用电磁阀连接于控制机构5，控制机构5通过控制接触器的开合控制合金丝3.3的加热，控制电磁阀的通断控制第一气缸和第二气缸的工作状态，避免了选用复杂的控制过程控制薄膜6切断和换卷，设计巧妙、易于安装，有利于本发明薄膜自动切断的收卷换卷装置的操作、检修及推广。
进一步结合图2和图4所示，说明本发明的薄膜自动切断的收卷换卷过程具体为：在薄膜6生产线上，薄膜6依次经牵引辊7、导向辊2.4、张力辊8、浮动辊9、导向辊2.4和接触辊10后收卷至双工位收卷机构2中收卷工位的收卷轴2.3上，收卷轴2.3转动，持续收卷薄膜6；当所述控制机构5感应到收卷工位上的收卷轴2.3卷曲的薄膜6长度达到满卷设定值时，首先控制中心转盘2.2转动，由于收卷工位和卸卷工位在同一直线上，通常中心转盘2.2向靠近压辊机构4侧旋转180°，使收卷工位上的收卷轴.3与卸卷工位的收卷轴2.3切换位置，使得压辊机构4和与收卷工位上收卷轴2.3对应的电融刀机构3分别位于 收卷工位上收卷轴2.3表面待贴合切断的薄膜6厚度方向的两侧；其次，控制机构5控制启动与收卷工位上收卷轴2.3对应安装的电融刀机构3，接触器闭合，与第一气缸连接的电磁阀接通，合金丝3.3开始加热，第一气缸启动，第一气缸伸缩杆伸出带动第一摆臂3.1和连接于第一摆臂3.1的旋转轴3.2旋转，使得旋转轴3.2上正在加热的合金丝3.3靠近于收卷工位上收卷轴2.3表面待贴合切断的薄膜8；再次，控制机构5控制与第二气缸连接的电磁阀接通，第二气缸启动，第二气缸伸缩杆伸出带动第二摆臂4.2旋转，第二摆臂4.2端部的压辊4.1贴合于收卷工位上的收卷轴2.3表面，将收卷工位上的收卷轴2.3表面待贴合切断的薄膜6分别贴合于收卷工位上的收卷轴2.3和正在加热的合金丝3.3；最后，收卷工位上的收卷轴2.3表面待贴合切断的薄膜6被高温合金丝3.3切断后经压辊4.1挤压并贴合于收卷工位上的收卷轴2.3表面，控制机构5断开控制合金丝3.3加热的接触器，断开与第一气缸、第二气缸连接的电磁阀，第一气缸伸缩杆和第二气缸伸缩杆回缩，将旋转轴3.2上合金丝及压辊4.1带回至控制机构5控制启动前设定位置。
虽然本发明已以较佳实施例揭露如上，然其并非用以限定本发明。本发明所属技术领域中具有通常知识者，在不脱离本发明的精神和范围内，当可作各种的更动与润饰。因此，本发明的保护范围当视权利要求书所界定者为准。

Claims (8)

  1. 一种薄膜自动切断的收卷换卷装置，包括机架、可转动地安装在机架上的双工位收卷机构、压辊机构和用于控制双工位收卷机构和压辊机构动作的控制机构；所述双工位收卷机构包括两根转轴、两个中心转盘、两根收卷轴和两根导向辊；所述转轴可转动地连接于机架，所述两个中心转盘分别设置在转轴远离机架的端部，且两个中心转盘盘面相互平行；所述中心转盘盘面上设置有位于同一直线的收卷工位和卸卷工位，收卷工位和卸卷工位关于转轴对称；所述两根收卷轴的两端分别转动连接于中心转盘，两根收卷轴均平行于转轴，且分别位于收卷工位和卸卷工位上，收卷工位的收卷轴与卸卷工位的收卷轴切换位置配合；所述导向辊的两端分别可转动地安装在两个中心转盘上，导向辊设置在于两根收卷轴之间，且导向辊平行于转轴，并对称安装于转轴的两侧；其特征在于，还包括设置在中心转盘盘面上的电融刀机构；所述电融刀机构包括两个，且分别与收卷轴相互对应安装；
    所述电融刀机构包括第一摆臂、旋转轴和第一传动机构；所述第一摆臂包括两个，分别设置在两个中心转盘相对的盘面上，且第一摆臂一端转动连接于中心转盘，另一端采用第二轴承转动连接于旋转轴端部；所述旋转轴沿平行于收卷轴方向设置在两个中心转盘之间，旋转轴上设置有平行于旋转轴的合金丝；所述合金丝电连接于控制机构，且合金丝的长度至少等于收卷工位上收卷轴表面待切断的薄膜的宽度；所述第一传动机构连接于第一摆臂，且第一传动机构电连接于控制机构；
    所述压辊机构安装在两个中心转盘之间，包括对应平行于收卷轴的压辊、第二摆臂和第二传动机构；所述第二摆臂包括两个，第二摆臂分别设置在压辊轴向两端，第二摆臂一端连接于压辊，另一端转动连接于机架；所述第二传动机构连接于第二摆臂，且第二传动机构电连接于控制机构；
    当所述控制机构感应到收卷工位上的收卷轴卷曲的薄膜长度达到满卷设定值时，首先控制中心转盘转动，使得收卷工位上的收卷轴与卸卷工位的收卷轴 切换位置，压辊机构和与收卷工位上收卷轴对应的电融刀机构分别位于收卷工位上收卷轴表面待贴合切断的薄膜厚度方向的两侧；其次，控制启动与收卷工位上收卷轴对应安装的电融刀机构，电融刀机构的合金丝开始加热，第一传动机构传动，带动第一摆臂和连接于第一摆臂的旋转轴旋转，使得旋转轴上正在加热的合金丝靠近于收卷工位上收卷轴表面待贴合切断的薄膜；再次，控制启动第二传动机构，第二传动机构传动，带动第二摆臂旋转，进而带动压辊将收卷工位上的收卷轴表面待贴合切断的薄膜分别贴合于收卷工位上的收卷轴和正在加热的合金丝；最后，收卷工位上的收卷轴表面待贴合切断的薄膜被高温合金丝切断后经压辊挤压并贴合于收卷工位上的收卷轴表面，控制机构控制电融刀机构和第二传动机构返回至控制启动前的设定位置。
  2. 根据权利要求1所述的薄膜自动切断的收卷换卷装置，其特征在于，所述旋转轴上设置有间隔安装的两根安装支座，两根安装支座相互平行且对应安装；所述安装支座远离旋转轴的端部设置有合金丝安装部，所述合金丝安装部包括同轴设置的调节螺栓、绝缘套和合金丝固定套；所述合金丝设置在两根安装支座之间，且合金丝的两端分别连接于合金丝安装部；
    所述安装支座远离旋转轴的端部设置有通孔，所述通孔的中心轴线平行于旋转轴，且通孔的内壁设置有螺纹；所述调节螺栓与通孔适配，调节螺栓沿靠近相邻安装支座的方向穿出于通孔，且调节螺栓穿出于通孔的端部连接于绝缘套；所述绝缘套远离调节螺栓的端部连接于合金丝固定套，所述合金丝固定套固连于合金丝端部。
  3. 根据权利要求2所述的薄膜自动切断的收卷换卷装置，其特征在于，所述合金丝安装部还包括张紧弹簧，所述张紧弹簧设置在调节螺栓和绝缘套之间，且张紧弹簧一端连接于调节螺栓穿出于通孔的端部，另一端连接于绝缘套靠近调节螺栓的端部；所述张紧弹簧用于调节两根安装支座之间合金丝的松紧程度。
  4. 根据权利要求2所述的薄膜自动切断的收卷换卷装置，其特征在于，所述安装支座可拆卸连接于旋转轴。
  5. 根据权利要求1所述的薄膜自动切断的收卷换卷装置，其特征在于，所述收卷轴采用第一轴承连接于中心转盘，所述旋转轴采用第二轴承连接于第一摆臂。
  6. 根据权利要求1所述的薄膜自动切断的收卷换卷装置，其特征在于，所述第一传动机构设置为第一气缸，第一气缸包括安装在中心转盘盘面上的第一气缸座和第一气缸伸缩杆，第一气缸伸缩杆一端连接于第一气缸座，另一端连接于第一摆臂；所述第二传动机构设置为第二气缸，第二气缸包括安装在机架上的第二气缸座和第二气缸伸缩杆，第二气缸伸缩杆一端连接于第二气缸座，另一端连接于第二摆臂。
  7. 根据权利要求1所述的薄膜自动切断的收卷换卷装置，其特征在于，所述合金丝采用接触器连接于控制机构。
  8. 根据权利要求6所述的薄膜自动切断的收卷换卷装置，其特征在于，所述第一气缸和第二气缸分别采用电磁阀连接于控制机构。
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