Cutting device for double-layer plastic film

Abstract

A cutting device for a double-layer plastic film relates to the technical field of plastic film production equipment, and comprises a U-shaped frame, and two film penetrating rollers are rotatably mounted between the upper parts of two opposite side walls of the U-shaped frame in parallel along the horizontal direction; the cutting mechanism comprises two sliding parts and two cutting parts, the two sliding parts are arranged on the two film penetrating rollers in an opposite sliding mode, the two cutting parts are arranged on the two sliding parts in a one-to-one correspondence mode, and the two cutting parts are oppositely arranged and located above the two film penetrating rollers; the adjusting mechanism comprises a driving part fixedly installed on one side wall of the U-shaped frame, a transmission part rotationally installed between the two opposite side walls of the U-shaped frame and two fine adjustment parts arranged on the two sliding parts in a one-to-one correspondence mode, the power output end of the driving part is connected with the transmission part, and the transmission part is movably connected with the two fine adjustment parts. Each fine adjustment part is used for driving the corresponding sliding part to move along the corresponding transmission part, and a locking piece is arranged between each fine adjustment part and the corresponding sliding part and used for limiting synchronous movement of the corresponding fine adjustment part and the corresponding transmission part.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film production equipment, in particular to a cutting device for double-layer plastic films. Background Art

[0002] The plastic film blown out by the film blowing machine is double-layered after passing through the pressure roller. If a single-layer plastic film is to be produced, the film needs to be cut. In the Chinese utility model patent with the authorization announcement number CN21807925U, a cutting device for double-layer plastic film is disclosed, including a U-shaped frame, in which two film-piercing rollers located in the same plane are rotatably connected, and the two ends of the two film-piercing rollers are respectively slidably connected with cutting components, and the cutting component includes an L-shaped support plate, and the vertical plates of the two L-shaped support plates are away from the side plates at the two ends of the U-shaped frame. The right-angled angle of the L-shaped support plate is detachably connected with a blade by a screw, and the end edge of the cross bar of the L-shaped support plate is connected to a driving component for driving the L-shaped support plate to slide on the film-piercing roller.

[0003] Although the above patent can cut double-layer plastic film, the L-shaped support plate is slidably set on two film-threading rollers, and it is easy to slide due to external force. Moreover, when adjusting the position of the two L-shaped support plates according to the width of the film, it is necessary to adjust the position of each L-shaped support plate, which is cumbersome to operate and has poor accuracy in adjusting the position of the two L-shaped support plates. At the same time, each L-shaped support plate is also connected to a weight block by a sliding rope, so that the position of each L-shaped support plate is easily changed by the gravity change of the weight block, affecting the cutting effect of the double-layer film. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a cutting device for double-layer plastic film, which solves the problems in the prior art that the position adjustment of the cutting components of the cutting device is complicated, easy to move, and the cutting effect is poor.

[0005] A cutting device for double-layer plastic film, comprising:

[0006] A ㄩ-shaped frame, on which two film-threading rollers are installed between the upper parts of the two opposite side walls and rotate in parallel in the horizontal direction;

[0007] The cutting mechanism comprises two sliding parts slidably arranged on the two film-penetrating rollers in opposite directions and two cutting parts arranged on the two sliding parts in a one-to-one correspondence, the two cutting parts are arranged in opposite directions and located above the two film-penetrating rollers; and

[0008] The adjusting mechanism comprises a driving part fixedly mounted on one side wall of the A-shaped frame, a transmission part rotatably mounted between two opposite side walls of the A-shaped frame, and two fine-adjustment parts arranged on the two sliding parts in a one-to-one correspondence. The power output end of the driving part is connected to the transmission part, and the transmission part is movably connected to the two fine-adjustment parts. Each of the fine-adjustment parts is used to drive the sliding part to move along the transmission part. A locking member is provided between each fine-adjustment part and the corresponding sliding part, and the locking member is used to limit the synchronous movement of the corresponding fine-adjustment part and the transmission part.

[0009] Compared with the prior art, the utility model has the following beneficial effects: when in use, according to the width of the double-layer plastic film, the driving part is started to cooperate with the two fine-adjusting parts through the transmission part to drive the two sliding parts to move toward or away from each other to adjust the distance between the two cutting parts. If the position of the double-layer plastic film is offset during the feeding or cutting process, the locking piece on each cutting part is opened at this time, and then the fine-adjusting part is operated to drive the corresponding sliding part to move on the corresponding transmission part to fine-adjust the position of the cutting part so that it can better cut the double-layer plastic film. After the adjustment is in place, the position of the fine-adjusting part can be fixed again by the locking piece; the operation is simple and convenient, and the position of the two cutting parts can be quickly adjusted according to the different widths of the double-layer plastic film. In addition, during the cutting process, the position of the two cutting parts will not be moved by external force, thereby ensuring a good cutting effect.

[0010] Preferably, the transmission part includes a screw rotatably installed between two opposite side walls of the A-shaped frame, the screw is threadedly connected to the two fine-tuning parts, and one end of the screw freely passes through the side wall of the A-shaped frame and is connected to the power output end of the driving part.

[0011] Preferably, each of the fine-tuning parts includes an internal threaded sleeve rotatably arranged on the corresponding sliding part and a rotating ring fixedly arranged on one end of the internal threaded sleeve, the screw includes two threaded sections with opposite rotation directions, the two internal threaded sleeves are threadedly connected to the two threaded sections in a one-to-one manner, and the locking member is arranged between the rotating ring and the sliding part.

[0012] Preferably, the driving part comprises a motor fixedly mounted on one side of the ㄩ-shaped frame, and a power output shaft of the motor is coaxially fixedly connected to the screw rod.

[0013] Preferably, each of the sliding parts includes a slider, and two sliding holes and a mounting hole are opened in parallel in the horizontal direction on the slider. The two film-penetrating rollers freely pass through the two sliding holes in a one-to-one correspondence. The internal threaded sleeve is rotatably installed in the mounting hole. After the internal threaded sleeve freely passes through the mounting hole, a limiting ring is coaxially fixedly installed. The locking piece is arranged between the rotating ring and the slider, and the two cutting parts are fixedly installed on the two side walls of the two sliders in a one-to-one correspondence.

[0014] Preferably, a threaded hole is provided on the rotating ring along its axial direction, and the locking member comprises a locking bolt threadably connected to the threaded hole, and the locking bolt is used to abut against the side wall of the slider.

[0015] Preferably, each of the cutting parts comprises an opening plate and a cutting knife, the opening plate is an L-shaped structure, the free end of the horizontal section of the opening plate is fixedly connected to the side wall of the slider, and the cutting knife is fixedly installed at the angle of the opening plate.

[0016] Preferably, two guide rollers are installed between the lower parts of the two facing side walls of the A-shaped frame so as to rotate parallel to each other in the horizontal direction.

[0017] Preferably, mounting plates are fixedly mounted on the upper ends of two opposite side walls of the A-shaped frame, and a guide roller is rotatably mounted between the two mounting plates.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of an embodiment of the utility model.

[0020] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0021] Figure 3 for Figure 2 A partial enlarged view of part Ⅰ.

[0022] Figure 4 for Figure 3 Schematic diagram of the structure of the middle slider.

[0023] Figure 5 for Figure 3 Schematic diagram of the structure of the middle fine-tuning part.

[0024] The numbers in the figure are as follows: 1, ㄩ-shaped frame; 2, guide roller; 3, mounting plate; 31, guide roller; 4, film-threading roller; 5, slider; 51, sliding hole; 52, mounting hole; 6, internal threaded sleeve; 61, rotating ring; 62, threaded hole; 63, locking bolt; 64, limiting ring; 7, support plate; 71, cutter; 8, motor; 81, screw. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and functions of the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods:

[0026] like Figure 1-3As shown, an embodiment of the utility model provides a cutting device for a double-layer plastic film, comprising: a A-shaped frame 1, between which two film-penetrating rollers 4 are installed and rotated in parallel along the horizontal direction between the upper parts of the two opposing side walls; a cutting mechanism, which comprises two sliding parts slidably arranged on the two film-penetrating rollers 4 in opposite directions, and two cutting parts arranged on the two sliding parts in a one-to-one correspondence, the two cutting parts are arranged in opposite directions and are located above the two film-penetrating rollers 4; and an adjusting mechanism, which comprises a driving part fixedly installed on one side wall of the A-shaped frame 1, a transmission part rotatably installed between the two opposing side walls of the A-shaped frame 1, and two fine-adjustment parts arranged on the two sliding parts in a one-to-one correspondence, the power output end of the driving part is connected to the transmission part, and the transmission part is movably connected to the two fine-adjustment parts. Each of the fine-adjustment parts is used to drive the sliding part to move along the transmission part, and a locking piece is provided between each fine-adjustment part and the corresponding sliding part, and the locking piece is used to limit the synchronous movement of the corresponding fine-adjustment part and the transmission part; preferably, two guide rollers 2 are installed between the lower parts of the two opposing side walls of the A-shaped frame 1 and rotate in parallel in the horizontal direction; and the upper ends of the two opposing side walls of the A-shaped frame 1 are fixedly installed with mounting plates 3, and a guide roller 31 is rotatably installed between the two mounting plates 3; so that when cutting the double-layer plastic film, the plastic film is first guided to the two cutting parts for cutting by the guide rollers 31, and the cut double-layer plastic film passes between the two film-threading rollers 4 and the two cut plastic films are guided and collected in different directions by the two guide rollers 2.

[0027] like Figure 1-5 As shown, according to another embodiment of the utility model, the cutting device for double-layer plastic film further optimizes the transmission part, fine-adjustment part and driving part included therein, and the transmission part includes a screw 81 rotatably installed between two opposite side walls of the A-shaped frame 1, and the screw 81 is threadedly connected to the two fine-adjustment parts, and one end of the screw 81 freely passes through the side wall of the A-shaped frame 1 and is connected to the power output end of the driving part.

[0028] Each of the fine-tuning parts includes an internal threaded sleeve 6 rotatably arranged on the corresponding sliding part and a rotating ring 61 fixedly sleeved on one end of the internal threaded sleeve 6. The screw 81 includes two threaded sections with opposite rotation directions. The two internal threaded sleeves 6 are threadedly connected to the two threaded sections in a one-to-one correspondence. The locking member is arranged between the rotating ring 61 and the sliding part.

[0029] The driving part comprises a motor 8 fixedly mounted on one side of the D-shaped frame 1, wherein the power output shaft of the motor 8 is coaxially fixedly connected with a screw rod 81; the motor 8 is a forward and reverse rotatable motor 8.

[0030] The motor 8 is started to drive the screw 81 to rotate. Under the action of the locking member, the internal threaded sleeve 6 does not rotate synchronously with the screw 81, and the screw 81 includes two threaded sections with opposite rotation directions. The two internal threaded sleeves 6 are threadedly connected to the two threaded sections in a one-to-one correspondence. Therefore, during the rotation of the screw 81, the two internal threaded sleeves 6 move toward or away from each other along the axial direction of the screw 81 to change the distance between the two cutting parts; when fine-tuning, ensure that the motor 8 stops, then open each locking member, operate each rotating ring 61 to rotate, so that the corresponding internal threaded sleeve 6 and the screw 81 rotate relative to each other, so as to drive the sliding part to move along the axial direction of the screw 81.

[0031] like Figure 1-5 As shown, according to another embodiment of the utility model, the cutting device for double-layer plastic film is further optimized in that the sliding part and the cutting part include each of the sliding parts. Each of the sliding parts includes a slider 5, and two sliding holes 51 and a mounting hole 52 are opened in parallel in the horizontal direction on the slider 5. The two film-piercing rollers 4 freely pass through the two sliding holes 51 in a one-to-one correspondence. The internal threaded sleeve 6 is rotatably installed in the mounting hole 52. After the internal threaded sleeve 6 freely passes through the mounting hole 52, a limiting ring 64 is coaxially fixedly installed. Through the limiting ring 6 4 can ensure the stability of the rotational connection between the internal thread sleeve 6 and the mounting hole 52. The locking member is arranged between the rotating ring 61 and the slider 5. The two cutting portions are fixedly mounted on the two side walls of the two sliders 5 facing each other in a one-to-one correspondence. The rotating ring 61 is provided with a threaded hole 62 along its axial direction. The locking member includes a locking bolt 63 threadedly connected to the threaded hole 62. The locking bolt 63 is used to abut against the side wall of the slider 5 to fix the rotating ring 61, so that the rotating ring 61 and the internal thread sleeve 6 do not move synchronously with the screw rod 81.

[0032] Each of the cutting parts includes a support plate 7 and a cutter 71, the support plate 7 is an L-shaped structure, the free end of the horizontal section of the support plate 7 is fixedly connected to the side wall of the slider 5, and the cutter 71 is fixedly installed at the angle of the support plate 7; the specific working principle of the cutters 71 of the two cutting parts cooperating with the support plate 7 to cut the double-layer plastic film is disclosed in the Chinese utility model patent with authorization announcement number CN21807925U, and will not be described in detail here.

[0033] The use principle of the utility model is as follows: when the utility model is used, according to the width of the double-layer plastic film, the motor 8 is started to drive the screw 81 to rotate. Because the internal thread sleeve 6 does not rotate synchronously with the screw 81 under the action of the locking bolt 63, and the screw 81 includes two thread segments with opposite rotation directions, the two internal thread sleeves 6 are connected to the two thread segments in a one-to-one correspondence. Therefore, during the rotation of the screw 81, the two internal thread sleeves 6 move toward or away from each other along the axial direction of the screw 81 to change the distance between the two sliders 5, the two opening plates 7 and the two cutters 71. If the position of the double-layer plastic film shifts during the feeding or cutting process, the motor 8 is stopped at this time, and then each locking bolt 63 is loosened, and then the rotating ring 61 is operated to drive the internal threaded sleeve 6 to rotate, and the slider 5 is driven to move axially along the screw 81, so as to fine-tune the position of the open plate 7 and the cutter 71, so that the open plate 7 and the cutter 71 can be re-adapted to the position of the double-layer plastic film, so as to better cut the double-layer plastic film. After the fine-tuning is in place, each locking bolt 63 is retightened to fix the position of the rotating ring 61.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cutting device for double-layer plastic film, characterized in that: include: A shaped frame (1) has two film-threading rollers (4) mounted between the upper parts of the two opposing side walls so as to rotate in parallel in the horizontal direction; A cutting mechanism, comprising two sliding parts slidably arranged on two film-penetrating rollers (4) in opposite directions, and two cutting parts arranged on the two sliding parts in a one-to-one correspondence, the two cutting parts being arranged in opposite directions and located above the two film-penetrating rollers (4); and The adjusting mechanism comprises a driving part fixedly mounted on one side wall of a type-A frame (1), a transmission part rotatably mounted between two opposite side walls of the type-A frame (1), and two fine-adjustment parts arranged on two sliding parts in a one-to-one correspondence, wherein the power output end of the driving part is connected to the transmission part, the transmission part is movably connected to the two fine-adjustment parts, each of the fine-adjustment parts is used to drive the sliding part to move along the transmission part, and a locking part is provided between each fine-adjustment part and the corresponding sliding part, and the locking part is used to limit the corresponding fine-adjustment part from moving synchronously with the transmission part.

2. A cutting device for double-layer plastic film according to claim 1, characterized in that: The transmission part comprises a screw rod (81) rotatably mounted between two opposite side walls of the A-shaped frame (1), the screw rod (81) being threadedly connected to the two fine-adjusting parts, and one end of the screw rod (81) freely passes through the side wall of the A-shaped frame (1) and is connected to the power output end of the driving part.

3. A cutting device for double-layer plastic film according to claim 2, characterized in that: Each of the fine-tuning parts comprises an internal thread sleeve (6) rotatably arranged on the corresponding sliding part and a rotating ring (61) fixedly sleeved on one end of the internal thread sleeve (6); the screw rod (81) comprises two thread segments with opposite rotation directions; the two internal thread sleeves (6) are threadedly connected to the two thread segments in a one-to-one correspondence; and the locking member is arranged between the rotating ring (61) and the sliding part.

4. A cutting device for double-layer plastic film according to claim 2, characterized in that: The driving part comprises a motor (8) fixedly mounted on one side of the A-shaped frame (1), and a power output shaft of the motor (8) is coaxially fixedly connected to a screw rod (81).

5. A cutting device for double-layer plastic film according to claim 3, characterized in that: Each of the sliding parts comprises a slider (5), and two sliding holes (51) and a mounting hole (52) are parallelly opened on the slider (5) in the horizontal direction. The two film-penetrating rollers (4) freely pass through the two sliding holes (51) in a one-to-one correspondence. The internal threaded sleeve (6) is rotatably mounted in the mounting hole (52). After the internal threaded sleeve (6) freely passes through the mounting hole (52), it is coaxially fixedly mounted with a limiting ring (64). The locking member is arranged between the rotating ring (61) and the slider (5), and the two cutting parts are fixedly mounted on the two side walls of the two sliders (5) facing each other in a one-to-one correspondence.

6. A cutting device for double-layer plastic film according to claim 5, characterized in that: The rotating ring (61) is provided with a threaded hole (62) along its axial direction. The locking member comprises a locking bolt (63) threadedly connected to the threaded hole (62). The locking bolt (63) is used to abut against the side wall of the slider (5).

7. A cutting device for double-layer plastic film according to claim 5, characterized in that: Each of the cutting parts comprises an opening plate (7) and a cutting knife (71); the opening plate (7) is an L-shaped structure; the free end of the horizontal section of the opening plate (7) is fixedly connected to the side wall of the slide block (5); and the cutting knife (71) is fixedly installed at the angle of the opening plate (7).

8. A cutting device for double-layer plastic film according to claim 1, characterized in that: Two guide rollers (2) are installed between the lower parts of the two facing side walls of the A-shaped frame (1) so as to rotate in parallel along the horizontal direction.

9. A cutting device for double-layer plastic film according to claim 1, characterized in that: Mounting plates (3) are fixedly mounted on the upper ends of two opposing side walls of the A-shaped frame (1), and a guide roller (31) is rotatably mounted between the two mounting plates (3).

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