An automatic cutting machine for foam tape and its usage method

Abstract

The present invention relates to the technical field of slitting equipment, and specifically relates to an automatic cutting machine for foam tape and a usage method. The cutting machine includes a base, a sleeved shaft rod, and a cutting tool. A first linear driver drives the cutting tool to horizontally move along the axis direction of the sleeved shaft rod. A rotary driver is sleeved with an end sleeve and an end head cylinder. An active bushing is also sleeved on the sleeved shaft rod. The active bushing is slidably installed between the end sleeve and the end head cylinder. The central plane of the active bushing is aligned with the cutting tool. A tool avoidance groove is provided at the central plane of the active bushing. The active bushing and the cutting tool are connected through a connecting pipe. In this technical solution, the tool avoidance groove is aligned with the cutting tool by the movement of the active bushing following the cutting tool. After the cutting tool feeds in and completely cuts the foam tape, the cutting head of the cutting tool is located in the tool avoidance groove of the active bushing and will not directly contact the outer wall of the sleeved shaft rod and the active bushing.

Description

Technical Field

[0001] The present invention relates to the technical field of slitting equipment, and specifically relates to an automatic cutting machine for foam tape and a usage method thereof. Background Art

[0002] Foam tape is made of EVA material or PE foam as the base material, with a solvent-based (or hot-melt) pressure-sensitive adhesive coated on one or both sides and then covered with release paper. It has the functions of sealing and shock absorption, and has excellent sealing performance, compression deformation resistance, flame retardancy, wettability, etc. Foam tape products are widely used in electronic and electrical products, mechanical parts, various small household appliances, mobile phone accessories, industrial instruments, computers and peripheral equipment, automotive accessories, audio and video equipment, toys, cosmetics, etc. With the rapid development of technology, the replacement cycle of electronic products is getting shorter and shorter, and electronic products are gradually tending towards being structured and aesthetically pleasing. When packaging the components of electronic products, various foam tapes are also required.

[0003] Chinese Patent CN115070843A discloses a cutting device for foam tape, which includes a frame. An installation frame is slidably installed on the frame. A tool rest is provided on the installation frame. A cutting knife is rotatably installed on the tool rest. A first driving mechanism for driving the cutting knife is provided on the tool rest. The tool rest is used to drive the cutting knife to move to cut the foam tape. The cutting knife feeds in an inclined manner and cuts vertically. A second driving mechanism is provided on the frame to drive the movement of the installation frame, and a third driving mechanism is provided on the installation frame to drive the movement of the tool rest. However, during the cutting, the cutting knife forces the blade to press tightly against the foam tape, and the cutting depth needs to be manually adjusted by the operator based on experience. When the cutting depth is relatively deep, the cutting knife contacts the sleeve shaft rod, and the sleeve shaft rod and the tool tip of the cutting tool are extremely prone to breakage and often need to be replaced, resulting in a low service life and a huge annual consumption. When the cutting depth is relatively shallow, the foam tape cannot be completely separated, making subsequent operations difficult. Summary of the Invention

[0004] In view of the above problems, it is necessary to provide an automatic cutting machine for foam tape and a usage method thereof for the problems of the prior art.

[0005] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0006] An automatic cutting machine for foam tape, comprising a base, and a sleeved shaft rod horizontally installed on the base. The sleeved shaft rod is drivingly connected to a rotary driver. A cutting tool is arranged on the base, and the cutting tool is fixedly installed at the working end of a first linear driver. The first linear driver drives the cutting tool to horizontally move along the axis direction of the sleeved shaft rod. An axial cavity penetrating the sleeved shaft rod is arranged inside the sleeved shaft rod; A head sleeve and an end head cylinder are sleeved on the rotary driver. The foam tape is sleeved on a lining sleeve coaxially arranged at one end of the head sleeve facing the end head cylinder. The fitting baffles protruding on the head sleeve and the end head cylinder fit the two ends of the foam tape; An active bushing is also sleeved on the sleeved shaft rod. The active bushing is slidably installed between the head sleeve and the end head cylinder. The central plane of the active bushing is aligned with the cutting tool. A tool avoidance groove is arranged at the central plane of the active bushing, and the diameter of the tool avoidance groove is smaller than the outer diameter of the lining sleeve; The active bushing is connected to the cutting tool through a connecting pipe. The active bushing moves synchronously with the cutting tool. One end of the connecting pipe extends along the axis of the sleeved shaft rod. The connecting pipe passes through the base and is inserted into the axial cavity of the sleeved shaft rod to be connected to the active bushing.

[0007] Preferably, the active bushing is composed of an outer core and an inner core arranged coaxially. The outer core is sleeved outside the sleeved shaft rod, and the inner core is inserted into the axial cavity of the sleeved shaft rod; A plurality of arc-shaped top blocks are respectively arranged at both ends of the outer core. The arc-shaped top blocks are equally angularly distributed around the axis of the outer core, and the arc-shaped top blocks move radially along the outer core; A guiding sleeve extending radially along the outer core is arranged inside the arc-shaped top block. The guiding sleeve is inserted on the guiding hole of the outer core. A piston cylinder on the inner core is on the same straight line as the axis of the guiding sleeve, and the piston cylinder is inserted into the guiding sleeve; A kidney-shaped hole is arranged on the sleeved shaft rod. The kidney-shaped holes are equally angularly distributed around the axis of the sleeved shaft rod and extend along the axis direction of the sleeved shaft rod. The width of the kidney-shaped hole is the same as the width of the guiding sleeve, and the guiding sleeve is inserted into the kidney-shaped hole to be connected to the inner core.

[0008] Preferably, the inside of the inner core is hollow, and an opening communicating the inside of the guiding sleeve and the inner core is arranged at the top end of the piston cylinder; One end of the connecting pipe is rotatably installed in a limit connecting head coaxially arranged at one end of the inner core. Hydraulic oil is filled in the connecting pipe and the inner core. A piston rod is inserted at the other end of the connecting pipe. The piston rod moves into the connecting pipe to push the arc-shaped top block to radially move outwards along the outer core to fit the inner wall of the foam tape.

[0009] Preferably, a mounting seat is installed on the working end of the first linear driver, and a hinge seat is arranged on the mounting seat; The cutting tool is fixedly installed on a tool rest. The bottom of the tool rest is hingedly installed on the hinge seat, and the rotation axis of the hinge seat is parallel to the axis of the sleeved shaft rod; A second linear driver is fixedly installed on the mounting seat. The working end of the second linear driver moves in a horizontal direction perpendicular to the axis of the sleeved shaft rod. The working end of the second linear driver is hingedly installed with a slider, and the slider is slidably installed in a limit sliding groove arranged on the back side of the tool rest.

[0010] Preferably, one end of the connecting pipe away from the movable bushing is inserted into a guide seat provided on one side of the mounting seat, and the connecting pipe is bent to extend parallel to the moving direction of the working end of the second linear actuator; the piston rod is in a "U" shape, and one end of the piston rod is fixedly connected to the working end of the second linear actuator through a connecting member.

[0011] Preferably, a liquid injection port and a pressure relief valve are provided on the connecting pipe.

[0012] Preferably, a sealing bearing is provided at the connection between the connecting pipe and the limit connection head of the inner core.

[0013] Preferably, a lining bushing is provided on the opposite side of the end head sleeve and the end head cylinder, and the inner diameter of the lining bushing is larger than the outer diameter when the arc-shaped top block fits the outer core.

[0014] Preferably, a threaded sleeve extending radially along the sleeve shaft is provided at one end of the end head sleeve and the end head cylinder away from the foam tape, and a locking screw spirally installed in the threaded sleeve fixes the positions of the end head sleeve and the end head cylinder on the sleeve shaft.

[0015] A method for using an automatic foam tape cutting machine, which is applied to an automatic foam tape cutting machine, includes the following steps:

[0016] Step 1: Set the foam tape on the sleeve shaft, adjust the positions of the end head sleeve and the end head cylinder, and the end head sleeve and the end head cylinder fixedly clamp the foam tape.

[0017] Step 2: Rotate the driver to start driving the foam tape on the sleeve shaft to rotate.

[0018] Step 3: The cutting tool cuts the foam tape, and after the cutting tool enters the tool avoiding groove of the movable bushing, it resets.

[0019] Step 4: The first linear actuator drives the cutting tool to move step by step, and the movable bushing moves along with the cutting tool.

[0020] The beneficial effects of the present invention compared with the prior art are as follows:

[0021] First, in the present invention, the movable bushing is connected to the cutting tool through a connecting pipe, so that when the first linear actuator drives the cutting tool to move to cut different parts of the foam tape, the movable bushing moves along with the cutting tool, keeping the tool avoiding groove in the middle of the movable bushing aligned with the cutting tool. After the cutting tool fully cuts the foam tape, the cutting head of the cutting tool is located in the tool avoiding groove of the movable bushing and will not directly contact the sleeve shaft and the outer wall of the movable bushing, thereby protecting the structures of the cutting tool, the sleeve shaft and the movable bushing and improving the service life of the equipment parts.

[0022] Second, the movable bushing in the present invention is composed of an outer core sleeved outside the sleeved shaft rod and an inner core in the shaft cavity. A plurality of arc-shaped top blocks are arranged on both sides of the outer core located in the tool avoiding groove. The arc-shaped top blocks can contract to a state of fitting the outer wall of the outer core when the movable bushing moves, reducing the friction between the movable bushing and the sleeved shaft rod during movement, which is beneficial to the movement of the movable bushing. When the cutting tool cuts the foam tape, the arc-shaped top blocks of the movable bushing support both sides of the cutting part of the foam tape, effectively preventing the deformation of the cutting position of the foam tape and ensuring the finished product quality.

[0023] Third, the connecting pipe in the present invention is filled with hydraulic oil. When the piston rod at the other end of the connecting pipe moves into the connecting pipe, the pressure inside the inner core can be increased, and the hydraulic oil pushes the guide sleeve sleeved on the piston cylinder radially outward along the inner core to realize the expansion of the arc-shaped top blocks. The piston rod can be fixedly connected to the working end of the second linear actuator through a connecting piece, so as to realize the synchronous movement of the cutting tool and the piston rod, and then realize the effect that the arc-shaped top blocks of the movable bushing automatically expand to support the foam tape during the cutting of the cutting tool and automatically reset after the cutting tool separates from the foam tape. Description of the Drawings

[0024] Figure 1 is a perspective view of an automatic foam tape cutting machine in the first working state;

[0025] Figure 2 is a top view of an automatic foam tape cutting machine in the first working state;

[0026] Figure 3 is Figure 2 the cross-sectional view taken along the line A-A of

[0027] Figure 4 is Figure 3 the partial enlarged view at B of

[0028] Figure 5 is a perspective view of an automatic foam tape cutting machine in the second working state;

[0029] Figure 6 is Figure 5 the partial enlarged view at C of

[0030] Figure 7 is Figure 5 the partial enlarged view at D of

[0031] Figure 8 is a top view of an automatic foam tape cutting machine in the second working state;

[0032] Figure 9 is Figure 8 the cross-sectional view taken along the line E-E of

[0033] Figure 10 is Figure 9 The partial enlarged view at position F of

[0034] Figure 11 is the exploded perspective view of a foam tape automatic cutting machine;

[0035] Figure 12 is Figure 11 The partial enlarged view at position G of

[0036] Figure 13 is Figure 11 The partial enlarged view at position H of

[0037] The reference numerals in the figure are: 1, base; 2, sleeved shaft rod; 21, rotary driver; 22, shaft cavity; 221, waist-shaped hole; 23, end head sleeve; 231, inner lining sleeve; 232, inner cavity; 233, threaded sleeve; 234, locking screw; 24, end head cylinder; 241, fitting baffle; 3, cutting tool; 31, first linear driver; 32, mounting seat; 321, hinge seat; 322, second linear driver; 323, guide seat; 33, tool holder; 331, slider; 332, limit chute; 4, movable bushing; 41, tool avoiding groove; 42, outer core; 421, guide hole; 43, inner core; 431, piston cylinder; 432, limit connector; 433, sealing bearing; 44, arc-shaped top block; 441, guide sleeve; 5, connecting pipe; 51, piston rod; 511, connector; 52, liquid injection port; 53, pressure relief valve. Detailed implementation manners

[0038] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0039] Refer to Figures 1 to 13 :

[0040] A foam tape automatic cutting machine includes a base 1 and a sleeve shaft rod 2 horizontally installed on the base 1. The sleeve shaft rod 2 is drivingly connected to a rotary driver 21. A cutting tool 3 is provided on the base 1. The cutting tool 3 is fixedly installed at the working end of a first linear driver 31. The first linear driver 31 drives the cutting tool 3 to horizontally move along the axis direction of the sleeve shaft rod 2. An axial cavity 22 penetrating the sleeve shaft rod 2 is provided inside the sleeve shaft rod 2; A head sleeve 23 and a head top cylinder 24 are sleeved on the rotary driver 21. The foam tape is sleeved on a lining sleeve 231 coaxially arranged at one end of the head sleeve 23 facing the head top cylinder 24. The fitting baffles 241 protruding on the head sleeve 23 and the head top cylinder 24 fit the two ends of the foam tape; A movable bushing 4 is also sleeved on the sleeve shaft rod 2. The movable bushing 4 is slidably installed between the head sleeve 23 and the head top cylinder 24. The central plane of the movable bushing 4 is aligned with the cutting tool 3. A tool avoidance groove 41 is provided at the central plane of the movable bushing 4. The diameter of the tool avoidance groove 41 is smaller than the outer diameter of the lining sleeve 231; The movable bushing 4 and the cutting tool 3 are connected by a connecting pipe 5. The movable bushing 4 moves synchronously with the cutting tool 3. One end of the connecting pipe 5 extends along the axis of the sleeve shaft rod 2. The connecting pipe 5 passes through the base 1 and is inserted into the axial cavity 22 of the sleeve shaft rod 2 to be connected with the movable bushing 4.

[0041] When the foam tape automatic cutting machine in this application is in use, the staff can sleeved the foam tape on the sleeved shaft rod 2 rotatably installed on the base 1. The cutting tool 3 moves step by step at equal intervals along the axis of the sleeved shaft rod 2 following the working end of the first linear driver 31, and cuts the foam tape on the sleeved shaft rod 2 one by one. The first linear driver 31 can be a slide table. In this embodiment, the sleeved shaft rod 2 is driven by a rotary driver 21 to drive the foam tape to rotate, and the strip blade type cutting tool 3 is inserted into the foam tape for cutting. The rotary driver 21 can be a servo motor, and is connected to the interface of the sleeved shaft rod 2 through a belt and a gear. In other embodiments, the foam tape on the stationary sleeved shaft rod 2 can also be cut by a rotating disc type cutting tool 3. In order to avoid the cutting tool 3 contacting the surface of the sleeved shaft rod 2 when feeding, in this embodiment, a end sleeve 23 and a end head cylinder 24 are arranged on the sleeved shaft rod 2. The inner lining sleeve 231 of the end sleeve 23 is inserted into one end of the foam tape, and the fitting baffle 241 of the end head cylinder 24 fits the other end of the foam tape to fixedly clamp the foam tape. After the positions of the end sleeve 23 and the end head cylinder 24 on the sleeved shaft rod 2 are fixed, the foam tape can be fixed, and the existence of the inner lining sleeve 231 makes there be a certain gap between the inner wall of the foam tape and the outer wall of the sleeved shaft rod 2. An active bushing 4 is also slidably installed on the sleeved shaft rod 2. The active bushing 4 moves within the inner wall of the foam tape. The active bushing 4 is connected to the cutting tool 3 through a connecting pipe 5. Thus, when the first linear driver 31 drives the cutting tool 3 to move and cut different parts of the foam tape, the active bushing 4 follows the cutting tool 3 to move, keeping the tool avoidance groove 41 in the middle of the active bushing 4 aligned with the cutting tool 3. After the cutting tool 3 feeds and completely cuts the foam tape, the cutting head of the cutting tool 3 is located in the tool avoidance groove 41 of the active bushing 4 and will not directly contact the outer walls of the sleeved shaft rod 2 and the active bushing 4, thereby protecting the structures of the cutting tool 3, the sleeved shaft rod 2 and the active bushing 4 and improving the service life of the equipment parts.

[0042] In order to solve the problem of how the active bushing 4 supports both sides of the cutting position to prevent the foam tape from deforming when the cutting tool 3 cuts the foam tape, the following features are specifically set:

[0043] The movable bushing 4 is composed of an outer core 42 and an inner core 43 which are coaxially arranged. The outer core 42 is sleeved outside the sleeve shaft rod 2, and the inner core 43 is inserted into the shaft cavity 22 of the sleeve shaft rod 2; a plurality of arc-shaped top blocks 44 are respectively arranged at both ends of the outer core 42. The arc-shaped top blocks 44 are equally angularly distributed around the axis of the outer core 42, and the arc-shaped top blocks 44 move radially along the outer core 42; a guide sleeve 441 extending radially along the outer core 42 is arranged inside the arc-shaped top block 44. The guide sleeve 441 is inserted into the guide hole 421 of the outer core 42. A piston cylinder 431 collinear with the axis of the guide sleeve 441 is arranged on the inner core 43. The piston cylinder 431 is inserted into the guide sleeve 441; a waist-shaped hole 221 is arranged on the sleeve shaft rod 2. The waist-shaped holes 221 are equally angularly distributed around the axis of the sleeve shaft rod 2 and extend along the axial direction of the sleeve shaft rod 2. The width of the waist-shaped hole 221 is the same as the width of the guide sleeve 441. The guide sleeve 441 is inserted into the waist-shaped hole 221 and connected to the inner core 43.

[0044] In this embodiment, one end of the connecting pipe 5 extends along the axis of the sleeved shaft rod 2 and is inserted into the shaft cavity 22 of the sleeved shaft rod 2. The movable bushing 4 is composed of an outer core 42 sleeved outside the sleeved shaft rod 2 and an inner core 43 in the shaft cavity 22. Connecting the connecting pipe 5 to the inner core 43 can drive the movable bushing 4 to move synchronously along the axis of the sleeved shaft rod 2 when the cutting tool 3 moves. A number of arc-shaped top blocks 44 are arranged on both sides of the outer core 42 located in the tool-avoiding groove 41. The arc-shaped top blocks 44 can move radially along the outer core 42. Therefore, when the movable bushing 4 moves on the sleeved shaft rod 2, the arc-shaped top blocks 44 can shrink to a state where they fit the outer wall of the outer core 42, so that the circumferential side of the movable bushing 4 does not fit the inner wall of the foam tape sleeved on the sleeved shaft rod 2, reducing the friction between the movable bushing 4 and the sleeved shaft rod 2 during movement, which is beneficial to the movement of the movable bushing 4. When the cutting tool 3 cuts the foam tape, the arc-shaped top blocks 44 of the movable bushing 4 move radially along the outer core 42 to fit the inner wall of the foam tape, supporting both sides of the cutting part of the foam tape, effectively preventing the deformation of the cutting position of the foam tape and ensuring the finished product quality. In order to connect the movable bushing 4 and the cutting tool 3, the connecting pipe 5 is U-shaped. One end of the connecting pipe 5 is connected to the cutting tool 3, and the other end is inserted into the shaft cavity 22 of the sleeved shaft rod 2, so as to be connected to the inner core 43 of the movable bushing 4. When the cutting tool 3 moves, it can drive the movable bushing 4 to move synchronously; in order to connect the outer core 42 and the inner core 43 on the inner and outer sides of the sleeved shaft rod 2, in this embodiment, a piston cylinder 431 extending radially along the inner core 43 is arranged on the circumferential side of the inner core 43. The piston cylinder 431 passes through the waist-shaped hole 221 provided on the sleeved shaft rod 2 and is inserted and connected to the guide sleeve 441 of the arc-shaped top blocks 44 at both ends of the outer core 42. The guide sleeve 441 is inserted into the guide hole 421 of the outer core 42, thus realizing the installation of the outer core 42, the inner core 43 and the arc-shaped top blocks 44. When the movable bushing 4 moves, the guide sleeve 441 and the piston cylinder 431 move along the waist-shaped hole 221 of the shaft cavity 22, and the movable bushing 4 follows the sleeved shaft rod 2 to rotate synchronously, avoiding the arc-shaped top blocks 44 from rubbing the inner wall of the foam tape.

[0045] In order to solve the problem of how to realize that the arc-shaped top blocks 44 of the movable bushing 4 automatically expand to support the foam tape during the cutting of the cutting tool 3 and automatically reset after the cutting tool 3 disengages from the foam tape, the following features are specifically set:

[0046] The inner core 43 is hollow inside, and an opening communicating the inside of the guide sleeve 441 and the inner core 43 is provided at the top end of the piston cylinder 431; one end of the connecting pipe 5 is rotatably installed in the limit connecting head 432 coaxially arranged at one end of the inner core 43. Hydraulic oil is filled in the connecting pipe 5 and the inner core 43. A piston rod 51 is inserted into the other end of the connecting pipe 5. When the piston rod 51 moves into the connecting pipe 5, it pushes the arc-shaped top blocks 44 to move radially outward along the outer core 42 to fit the inner wall of the foam tape.

[0047] A mounting seat 32 is installed on the working end of the first linear drive 31, and a hinge seat 321 is provided on the mounting seat 32; the cutting tool 3 is fixedly installed on the tool holder 33, and the bottom of the tool holder 33 is hingedly installed on the hinge seat 321, and the rotation axis of the hinge seat 321 is parallel to the axis of the sleeve shaft 2; a second linear drive 322 is fixedly installed on the mounting seat 32, and the working end of the second linear drive 322 moves in a horizontal direction perpendicular to the axis of the sleeve shaft 2, and a slider 331 is hingedly installed on the working end of the second linear drive 322, and the slider 331 is slidably installed in a limiting slide groove 332 provided on the back side of the tool holder 33.

[0048] One end of the connecting tube 5 away from the movable bushing 4 is inserted into a guide seat 323 arranged on one side of the mounting seat 32, and the connecting tube 5 is bent to extend parallel to the moving direction of the working end of the second linear drive 322; the piston rod 51 is "U"-shaped, and one end of the piston rod 51 is fixedly connected to the working end of the second linear drive 322 through a connecting piece 511.

[0049] In this embodiment, the connecting tube 5 is filled with hydraulic oil, and gas can also be injected. The connecting tube 5 is connected to the cavity inside the inner core 43. When the piston rod 51 at the other end of the connecting tube 5 moves into the connecting tube 5, the pressure in the inner core 43 can be increased, and the hydraulic oil pushes the guide sleeve 441 sleeved on the piston cylinder 431 radially outward along the inner core 43 to achieve the expansion of the arc top block 44. When one of the arc top blocks 44 is in contact with the foam tape, the movement is restricted, and the pressure of the hydraulic oil is increased to the other guide sleeves 441 to ensure that all the arc top blocks 44 can be in contact with the foam tape for support. When the piston rod 51 is pulled outward, the negative pressure generated in the inner core 43 can also drive the arc top block 44 to reset. In this embodiment, the cutting tool 3 is installed on the tool holder 33 The tool holder 33 is hingedly mounted on the hinge seat 321 of the mounting seat 32, and the cutting tool 3 is driven to rotate around the axis of the hinge seat 321 through the second linear driver 322 on the mounting seat 32, so that the cutting tool 3 is close to the surface of the foam tape for cutting. The second linear driver 322 can be a pneumatic or electric push rod, etc. The working end of the second linear driver 322 is kept horizontal with one end of the connecting tube 5, and the piston rod 51 can be fixedly connected to the working end of the second linear driver 322 through the connecting piece 511, so as to realize the synchronous movement of the cutting tool 3 and the piston rod 51, and the arc-shaped top block 44 of the movable bushing 4 can be automatically unfolded to support the foam tape when the cutting tool 3 is cutting, and the cutting tool 3 is automatically reset after it is separated from the foam tape.

[0050] In order to solve the problem of how to ensure that the pressure in the connecting pipe 5 is not too high, the following features are specifically set:

[0051] The connecting pipe 5 is provided with a liquid injection port 52 and a pressure relief valve 53 .

[0052] In this embodiment, a liquid injection port 52 and a pressure relief valve 53 are provided on the connecting pipe 5. The staff adds hydraulic oil into the inner core 43 and the connecting pipe 5 through the liquid injection port 52 to maintain an appropriate pressure in the connecting pipe 5 and the inner core 43, so that the distance that the working end of the second linear actuator 322 drives the piston rod 51 to move can ensure that all the arc-shaped top blocks 44 move to a position where they are in contact with the inner wall of the foam tape. When all the arc-shaped top blocks 44 can no longer move, the second linear actuator 322 can still drive the piston rod 51 and the cutting tool 3 to continue moving for cutting. At this time, the excess pressure in the connecting pipe 5 can open the pressure relief valve 53 to prevent the pressure in the connecting pipe 5 and the inner core 43 from being too high.

[0053] To solve the problem of how to ensure the seal at the connection between the rotating inner core 43 and the connecting pipe 5, the following features are specifically set:

[0054] A sealing bearing 433 is provided at the connection between the connecting pipe 5 and the limit connection head 432 of the inner core 43.

[0055] In this embodiment, the sealing bearing 433 keeps the connection between the connecting pipe 5 and the limit connection head 432 of the rotating inner core 43 sealed and does not affect the rotation of the inner core 43. The sealing bearing 433 can also be realized by other dynamic sealing technologies.

[0056] To solve the problem of how to ensure that the cutting tool 3 can cut the part of the foam tape at the fitting baffle 241 that fits the end fitting sleeve 23 and the end head cylinder 24, the following features are specifically set:

[0057] A lining sleeve 231 is provided on the opposite side of the end fitting sleeve 23 and the end head cylinder 24. The inner diameter of the lining sleeve 231 is larger than the outer diameter of the arc-shaped top block 44 when it fits the outer core 42.

[0058] In this embodiment, a lining sleeve 231 can be provided on the opposite side of the end fitting sleeve 23 and the end head cylinder 24. The arc-shaped top block 44 of the movable lining sleeve 4 can place the movable lining sleeve 4 in the lining sleeve 231 in the contracted state, so that the knife avoidance groove 41 at the center of the movable lining sleeve 4 is closer to both ends of the foam tape, thus facilitating the cutting of the foam tape, reducing waste, and lowering the production cost.

[0059] To solve the problem of how to fix the positions of the end fitting sleeve 23 and the end head cylinder 24 on the sleeved shaft rod 2, the following features are specifically set:

[0060] Threaded sleeves 233 extending radially along the sleeved shaft rod 2 are provided at the ends of the end fitting sleeve 23 and the end head cylinder 24 away from the foam tape. The locking screws 234 screwed into the threaded sleeves 233 fix the positions of the end fitting sleeve 23 and the end head cylinder 24 on the sleeved shaft rod 2.

[0061] In this embodiment, a threaded sleeve 233 is provided at the outer ends of the end head sleeve 23 and the end head cylinder 24. The locking screw 234 is spirally installed on the locking screw 234. Rotating the locking screw 234 can make the locking screw 234 fit against the outer wall of the sleeve shaft 2, thereby fastening the positions of the end head sleeve 23 and the end head cylinder 24, facilitating the staff to adjust the position of the foam tape on the sleeve shaft 2 according to the length of the foam tape, and realizing the processing of foam tapes of different sizes.

[0062] A method for using an automatic foam tape cutting machine, which is applied to an automatic foam tape cutting machine, includes the following steps:

[0063] Step 1: Set the foam tape on the sleeve shaft 2, and adjust the positions of the end head sleeve 23 and the end head cylinder 24. The end head sleeve 23 and the end head cylinder 24 fixedly clamp the foam tape.

[0064] Step 2: Rotate the driver 21 to start driving the foam tape on the sleeve shaft 2 to rotate.

[0065] Step 3: The cutting tool 3 cuts the foam tape. After the cutting tool 3 enters the tool avoiding groove 41 of the movable bushing 4, it resets.

[0066] Step 4: The first linear driver 31 drives the cutting tool 3 to move step by step, and the movable bushing 4 follows the cutting tool 3 to move.

[0067] Working principle: The staff can set the foam tape on the sleeve shaft 2 rotatably installed on the base 1. The inner lining sleeve 231 of the end head sleeve 23 inserts into one end of the foam tape, and the fitting baffle 241 of the end head cylinder 24 fits against the other end of the foam tape to fixedly clamp the foam tape. The cutting tool 3 moves step by step at equal intervals along the axis of the sleeve shaft 2 following the working end of the first linear driver 31 to cut the foam tape on the sleeve shaft 2 one by one. The movable bushing 4 is connected to the cutting tool 3 through the connecting pipe 5, and the movable bushing 4 moves inside the inner wall of the foam tape. Thus, when the first linear driver 31 drives the cutting tool 3 to move to cut different parts of the foam tape, the movable bushing 4 follows the cutting tool 3 to move, keeping the tool avoiding groove 41 in the middle of the movable bushing 4 aligned with the cutting tool 3. The arc-shaped top block 44 of the movable bushing 4 automatically unfolds to support the foam tape when the cutting tool 3 cuts. After the cutting tool 3 fully cuts the foam tape, the cutting head of the cutting tool 3 is located in the tool avoiding groove 41 of the movable bushing 4 and will not directly contact the outer walls of the sleeve shaft 2 and the movable bushing 4. After the cutting tool 3 disengages from the foam tape, the arc-shaped top block 44 automatically resets.

[0068] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. An automatic cutting machine for foam tape, comprising a base, and a sleeve shaft rod horizontally installed on the base. The sleeve shaft rod is drivingly connected to a rotary driver. A cutting tool is provided on the base, and the cutting tool is fixedly installed at the working end of a first linear driver. The first linear driver drives the cutting tool to horizontally move along the axis direction of the sleeve shaft rod, and is characterized in that, A shaft sleeve is provided with a shaft cavity that runs through the shaft sleeve; a rotary drive is sleeved with an end head sleeve and an end head cylinder, and a foam tape is sleeved on a lining sleeve coaxially arranged at one end of the end head sleeve facing the end head cylinder, and the fitting baffles protruding on the end head sleeve and the end head cylinder fit the two ends of the foam tape; An activity lining sleeve is also sleeved on the shaft sleeve, and the activity lining sleeve is slidably installed between the end head sleeve and the end head cylinder. The central plane of the activity lining sleeve is aligned with the cutting tool. A tool avoidance groove is arranged at the central plane of the activity lining sleeve, and the diameter of the tool avoidance groove is smaller than the outer diameter of the lining sleeve; The activity lining sleeve is connected to the cutting tool through a connecting pipe. The activity lining sleeve moves synchronously with the cutting tool. One end of the connecting pipe extends along the axis of the shaft sleeve, and the connecting pipe passes through the base and inserts into the shaft cavity of the shaft sleeve to be connected to the activity lining sleeve; The activity lining sleeve is composed of an outer core and an inner core arranged coaxially. The outer core is sleeved outside the shaft sleeve, and the inner core is inserted into the shaft cavity of the shaft sleeve; A number of arc-shaped top blocks are respectively arranged at both ends of the outer core. The arc-shaped top blocks are distributed at equal angles around the axis of the outer core, and the arc-shaped top blocks move radially along the outer core; A guide sleeve extending radially along the outer core is arranged inside the arc-shaped top block. The guide sleeve is inserted on the guide hole of the outer core, and a piston cylinder on the inner core is arranged on the same straight line as the axis of the guide sleeve. The piston cylinder is inserted into the guide sleeve; A kidney-shaped hole is arranged on the shaft sleeve. The kidney-shaped holes are distributed at equal angles around the axis of the shaft sleeve and extend along the axis direction of the shaft sleeve. The width of the kidney-shaped hole is the same as the width of the guide sleeve. The guide sleeve is inserted into the kidney-shaped hole to be connected to the inner core; The inner core is hollow inside, and an opening connecting the inside of the guide sleeve and the inner core is arranged at the top end of the piston cylinder; One end of the connecting pipe is rotatably installed in a limit connecting head coaxially arranged at one end of the inner core. Hydraulic oil is filled in the connecting pipe and the inner core. The other end of the connecting pipe is inserted with a piston rod. The piston rod moves into the connecting pipe to push the arc-shaped top block to move radially outward along the outer core to fit the inner wall of the foam tape; An installation seat is installed on the working end of the first linear drive; A second linear drive is fixedly installed on the installation seat, and the working end of the second linear drive moves in the horizontal direction perpendicular to the axis of the shaft sleeve; The other end of the connecting pipe away from the activity lining sleeve is inserted into a guide seat arranged on one side of the installation seat, and the connecting pipe is bent to extend parallel to the moving direction of the working end of the second linear drive; the piston rod is in a "U" shape, and one end of the piston rod is fixedly connected to the working end of the second linear drive through a connecting piece.

2. The automatic cutting machine for foam tapes according to claim 1, wherein, A hinge seat is arranged on the installation seat; The cutting tool is fixedly installed on the tool rest, and the bottom of the tool rest is hingedly installed on the hinge seat. The rotation axis of the hinge seat is parallel to the axis of the shaft sleeve; The working end of the second linear drive is hingedly installed with a slider, and the slider is slidably installed in a limit chute arranged on the back side of the tool rest.

3. The automatic cutting machine for foam tape according to claim 1, wherein A liquid injection port and a pressure relief valve are arranged on the connecting pipe; 4. The automatic cutting machine for foam tape according to claim 1, wherein, A sealing bearing is arranged at the connection between the connecting pipe and the limit connecting head of the inner core; 5. The automatic cutting machine for foam tape according to claim 1, wherein A lining sleeve is arranged on the side of the end head sleeve and the end head cylinder facing each other. The inner diameter of the lining sleeve is larger than the outer diameter when the arc-shaped top block fits the outer core.

6. The automatic cutting machine for foam tape according to claim 1, wherein, A threaded sleeve extending radially along the sleeved shaft is provided at one end of the end head sleeve and the end head cylinder away from the foam tape, and the locking screw spirally installed in the threaded sleeve fixes the positions of the end head sleeve and the end head cylinder on the sleeved shaft.

7. A method for using an automatic cutting machine for foam tape, which is applied to the automatic cutting machine for foam tape according to any one of claims 1-6, characterized in that, It includes the following steps: Step 1: Sleeve the foam tape on the sleeved shaft, adjust the positions of the end head sleeve and the end head cylinder, and the end head sleeve and the end head cylinder fixedly clamp the foam tape. Step 2: Start the rotary driver to drive the foam tape on the sleeved shaft to rotate. Step 3: The cutting tool cuts the foam tape, and the cutting tool returns after entering the tool-avoiding groove of the movable bushing. Step 4: The first linear driver drives the cutting tool to move step by step, and the movable bushing moves following the cutting tool.

Images