A high-speed plastic bag film blowing machine

Abstract

The present invention relates to the technical field of plastic bag production, and specifically to a high-speed film blowing machine for plastic bags, the film blowing machine comprising a main frame: comprising a mounting platform arranged on the main frame, a plurality of slide plates fixedly mounted on the surface of the mounting platform, and a film blowing head fixedly mounted on the surface of the mounting platform; a film pulling mechanism comprising a plurality of movable curved rods mounted on the mounting platform, the surface of each movable curved rod being connected to the output end of a telescopic cylinder, the output end of the telescopic cylinder passing through the interior of a fixed curved rod and being slidably connected to the fixed curved rod, a plurality of reducing rods being further mounted on the mounting platform, and rollers being rotatably mounted on the surface of the reducing rods; the reducing rods move away from the central axis of the mounting platform under the action of a sliding mechanism, and at this time, under the action of an external winding device, drive the previous film segment to be wound, and then drive the new film segment to move synchronously, thereby achieving the purpose of automatically connecting the new film segment to perform film blowing operation, and improving the function of plastic bag production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bag production, in particular to a high-speed film blowing machine for plastic bags. Background Art

[0002] At present, with the development of life, the use of plastic bags has greatly increased the convenience of people's packaging. By making plastic bags of different sizes, products of different sizes can be packaged. In the process of making plastic bags, a film blowing machine is needed to form the plastic bags, thereby converting plastic particles into plastic bags.

[0003] In the current process of making plastic bags, after the film blowing machine finishes film blowing, the next film blowing needs to be pulled out and connected with the film segment left over from the previous film blowing, so that the new film can be blown by winding it up. However, when the blown plastic film is pulled out, the new film may be damaged due to unstable human traction, which requires repeated traction operations, greatly affecting production efficiency.

[0004] Based on this, the present invention designs a plastic bag high-speed film blowing machine to solve the above problems. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a high-speed film blowing machine for plastic bags, aiming to solve the technical problems existing in the prior art mentioned in the background technology.

[0006] The embodiment of the present invention is implemented as follows: a high-speed film blowing machine for plastic bags, the film blowing machine comprising:

[0007] Main frame: including a mounting platform arranged on the main frame, a plurality of slide plates are fixedly installed on the surface of the mounting platform, and a film blowing head is also fixedly installed on the surface of the mounting platform;

[0008] Film pulling mechanism: It includes a plurality of movable curved rods installed on the mounting platform, the surface of each movable curved rod is connected to the output end of the telescopic cylinder, the output end of the telescopic cylinder penetrates the interior of the fixed curved rod and is slidably connected to the fixed curved rod, and a plurality of reducing rods are also installed on the mounting platform, and rollers are rotatably installed on the surface of the reducing rods;

[0009] Rotation mechanism: used to drive the film pulling mechanism to rotate and release;

[0010] Sliding mechanism: used to guide the film while the film pulling mechanism is rising;

[0011] Positioning mechanism: used to position the film pulling mechanism;

[0012] Heat sealing mechanism: used to clamp and heat seal the film.

[0013] Furthermore, the rotating mechanism includes a rotating connecting rod slidably connected to the moving bent rod, and a fixed bent rod and a telescopic cylinder are fixedly installed on the surface of the rotating connecting rod, the output end of the telescopic cylinder passes through the rotating connecting rod and is slidably connected to the rotating connecting rod, two linkage gears are fixedly installed on the surface of the rotating connecting rod, each linkage gear is meshed with each moving rack, a pressure rod is fixedly installed on the surface of the moving rack, a compression spring is fixedly installed on the surface of the pressure rod, one end of the pressure rod away from the compression spring is rollingly connected to a guide block, two ball bearings are rotatably connected to the inner wall of the guide block, the surface of the guide block is slidably connected to the inner wall of the fixed cylinder, a reset spring is fixedly installed on the surface of the guide block, and a reaction block is fixedly installed on the surface of the mounting table.

[0014] Furthermore, the sliding mechanism includes a sliding link fixedly connected to the surface of the reducing rod, the surface of the sliding link is slidably connected to a sliding frame, the surface of the sliding frame is fixedly installed with a lifting rod, the surface of the sliding frame is connected to the reducing rod through an extrusion spring, the end of the sliding link away from the reducing rod is in contact with the surface of the ramp slider, the ramp slider is fixedly installed on the slide plate, and the sliding frame is slidably connected to the inner wall of the slide plate.

[0015] Furthermore, the positioning mechanism includes an extension rod rotatably connected to two linkage gears, the surface of the extension rod contacts the inner wall of the positioning cylinder, and a rolling ball is provided at the contact position between the extension rod and the positioning cylinder, and a ramp fixing block corresponding to the extension rod is fixedly installed on the inner wall of the positioning cylinder.

[0016] Furthermore, the film blowing machine also includes a driving mechanism, which includes a driving motor installed on a mounting table, and a rotating bevel gear is fixedly installed on the output end of the driving motor. The rotating bevel gear is meshed with a bevel gear block, and the bevel gear block is coaxially fixedly connected to the surface of the positioning drum.

[0017] Furthermore, the film blowing machine also includes a lifting mechanism, which includes a rotating screw rotatably connected to the mounting table, the rotating screw and the screw moving block form a spiral pair transmission, the surface of the screw moving block is rotatably connected to a positioning rotating cylinder, the surface of the screw moving block is fixedly installed with a driving motor, the surface of the screw moving block is fixedly installed with a fixed cylinder, an extension rod passes through the interior of the screw moving block, and the screw moving block is slidably connected to the extension rod.

[0018] Furthermore, the heat sealing mechanism includes two heat sealing rods slidably connected to the surface of the screw moving block.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention drives the new film segment to rise by moving the curved rod and the fixed curved rod. On the one hand, a uniform pulling force is generated on the new film segment, so that the new film segment will not break. On the other hand, the new film segment is gradually cooled and formed during the rising process. At the same time, the shrinking rod gathers the previous film segment into the new film segment, so as to achieve the purpose of automatic docking.

[0021] 2. The present invention enables the reducing rod to move away from the central axis of the mounting platform under the action of the sliding mechanism. At this time, the previous film segment is driven to be wound under the action of the external winding device, and then the new film segment is driven to move synchronously, thereby achieving the purpose of automatically connecting the new film segment for film blowing operation and improving the production efficiency of plastic bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of a high-speed plastic bag film blowing machine provided by an embodiment of the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0024] Figure 3 For the present invention Figure 1 A schematic cross-sectional structure diagram of ;

[0025] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at B;

[0026] Figure 5 It is a cross-sectional schematic diagram of a high-speed plastic bag film blowing machine of the present invention from another viewing angle;

[0027] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at C;

[0028] Figure 7 It is a schematic diagram of the installation position structure of the screw rod moving block of the present invention;

[0029] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at D of FIG.

[0030] Fig. 9 It is a schematic diagram of the installation position structure of the heat sealing rod of the present invention.

[0031] In the attached drawings: 1, main frame; 101, mounting platform; 102, slide plate; 103, film blowing head; 2, film pulling mechanism; 201, moving curved rod; 202, fixed curved rod; 203, telescopic cylinder; 204, reducing rod; 3, rotating mechanism; 301, rotating connecting rod; 302, linkage gear; 303, moving rack; 304, pressure rod; 305, compression spring; 306, guide block; 307, fixed cylinder; 308, reset spring; 309, reaction block ; 4. Sliding mechanism; 401. Lifting rod; 402. Sliding frame; 403. Sliding connecting rod; 404. Extrusion spring; 405. Ramp slider; 5. Positioning mechanism; 501. Extending rod; 502. Positioning drum; 503. Ramp fixing block; 6. Driving mechanism; 601. Driving motor; 602. Rotating bevel gear; 603. Bevel gear block; 7. Lifting mechanism; 701. Rotating screw; 702. Screw moving block; 8. Heat sealing mechanism; 801. Heat sealing rod. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but unless otherwise specified, these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0034] like Figure 1 , Figure 4 , Figure 6 and Figure 8 As shown, in one embodiment, a high-speed film blowing machine for plastic bags is provided, the film blowing machine comprising:

[0035] The main frame 1 includes a mounting platform 101 disposed on the main frame 1 , a plurality of slide plates 102 are fixedly mounted on the surface of the mounting platform 101 , and a film blowing head 103 is also fixedly mounted on the surface of the mounting platform 101 ;

[0036] Film pulling mechanism 2: includes a plurality of movable curved rods 201 mounted on the mounting platform 101, the surface of each movable curved rod 201 is connected to the output end of the telescopic cylinder 203, the output end of the telescopic cylinder 203 penetrates the interior of the fixed curved rod 202, and is slidably connected to the fixed curved rod 202, and a plurality of reducing rods 204 are also mounted on the mounting platform 101, and rollers are rotatably mounted on the surface of the reducing rods 204;

[0037] Rotating mechanism 3: used to drive the film pulling mechanism 2 to rotate and release;

[0038] Sliding mechanism 4: used to guide the film while the film pulling mechanism 2 is rising;

[0039] Positioning mechanism 5: used to position the film pulling mechanism 2;

[0040] Heat sealing mechanism 8: used for clamping and heat sealing the film.

[0041] In practical application of the embodiment of the present invention, when the film blowing operation is started, Figure 4 As shown, from Figure 4 Looking from the front direction, at this time, the positioning mechanism 5 drives the movable curved rod 201 and the fixed curved rod 202 to move to the film outlet position. After the film blowing head 103 outlets the film, the telescopic cylinder 203 drives the movable curved rod 201 to move in the direction of the fixed curved rod 202. It should be noted here that the movable curved rod 201 moves in the direction of the fixed curved rod 202, thereby expanding the opening of the newly blown film segment. At this time, the movable curved rod 201 and the fixed curved rod 202 clamp the blown film and drive the plastic film to move vertically upward. Due to the action of the plurality of reducing rods 204, the film segment left behind last time is gathered. As the movable curved rod 201 and the fixed curved rod 202 drive the new film segment to rise, on the one hand, a uniform pulling force is generated on the new film segment, so that the new film segment will not break. On the other hand, the new film segment is gradually pulled upward during the rising process. The film is gradually cooled and formed, and at the same time, the previous film segment is brought into the new film segment through the gathering effect of the shrinking rod 204 to achieve the purpose of automatic docking. The roller arranged on the shrinking rod 204 is used to avoid hard contact with the previous film segment, resulting in the previous film segment being driven to rise together. It should be noted here that during the movement of the device, the cooling device of the film blowing machine itself is in a closed state to avoid affecting the position of the film segment. At this time, the continued rise of the movable curved rod 201 and the fixed curved rod 202 drives the shrinking rod 204 to rise synchronously, and the shrinking rod 204 guides the previous film segment. When the movable curved rod 201 and the fixed curved rod 202 rise to a certain position, at this time, since the previous film segment is already located in the new film segment, the heat sealing mechanism 8 presses the new film segment and the previous film segment under the external driving action, and the new film segment after heating is adhered to the previous film segment, such as Figure 6 As shown, from Figure 6 At the same time, under the action of the rotating mechanism 3, the movable curved rod 201 and the fixed curved rod 202 are driven to rotate upward, the telescopic cylinder 203 drives the movable curved rod 201 and the fixed curved rod 202 to separate, and the positioning mechanism 5 drives the movable curved rod 201 and the fixed curved rod 202 to reset to avoid affecting the normal movement of the new film, such as Figure 8As shown, the reducing rod 204 moves away from the central axis of the mounting platform 101 under the action of the sliding mechanism 4. At this time, the previous film segment is driven to be wound under the action of the external winding device, and then the new film segment is driven to move synchronously, thereby achieving the purpose of automatically connecting the new film segment for film blowing operation and improving the production efficiency of plastic bags.

[0042] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, as a preferred embodiment of the present invention, the rotating mechanism 3 includes a rotating connecting rod 301 slidably connected to the moving bent rod 201, and the fixed bent rod 202 and the telescopic cylinder 203 are fixedly installed on the surface of the rotating connecting rod 301, the output end of the telescopic cylinder 203 passes through the rotating connecting rod 301 and is slidably connected to the rotating connecting rod 301, two linkage gears 302 are fixedly installed on the surface of the rotating connecting rod 301, each linkage gear 302 is meshed with each moving rack 303, a pressure rod 304 is fixedly installed on the surface of the moving rack 303, a compression spring 305 is fixedly installed on the surface of the pressure rod 304, one end of the pressure rod 304 away from the compression spring 305 is rollingly connected to a guide block 306, the inner wall of the guide block 306 is rotatably connected to two balls, the surface of the guide block 306 is slidably connected to the inner wall of the fixed cylinder 307, a reset spring 308 is fixedly installed on the surface of the guide block 306, and a reaction block 309 is fixedly installed on the surface of the mounting platform 101.

[0043] In practical application of the embodiment of the present invention, when the film pulling mechanism 2 drives the new film segment to move upward, when the previous film segment enters the new film segment, Figure 3 and Figure 4 As shown, from Figure 4 From the front view direction, the continued upward movement of the film pulling mechanism 2 drives the compressed rod 304 to contact the reaction block 309. At this time, the compressed rod 304 is driven downward by the extrusion of the reaction block 309. Figure 6 As shown, the downward movement of the pressure rod 304 drives the movable rack 303 to move downward, and then drives the rotating connecting rod 301 to rotate through the meshing action of the gear rack, so that the movable curved rod 201 and the fixed curved rod 202 rotate. At this time, the new film segment is loosened under the action of the telescopic cylinder 203, thereby achieving the purpose of automatically releasing the new film segment for film blowing operation.

[0044] like Figure 7 and Figure 8As shown, as another preferred embodiment of the present invention, the sliding mechanism 4 includes a sliding link 403 fixedly connected to the surface of the reducing rod 204, the surface of the sliding link 403 is slidably connected to the sliding frame 402, the surface of the sliding frame 402 is fixedly installed with a lifting rod 401, the surface of the sliding frame 402 is connected to the reducing rod 204 through an extrusion spring 404, the end of the sliding link 403 away from the reducing rod 204 is in contact with the surface of the ramp slider 405, the ramp slider 405 is fixedly installed on the slide plate 102, and the sliding frame 402 is slidably connected to the inner wall of the slide plate 102.

[0045] In actual application of the embodiment of the present invention, when the film-pulling mechanism 2 drives the new film segment to rise so that the previous film segment enters the new film segment, the lifting rod 401 is pushed upward by the film-pulling mechanism 2, and the movement of the lifting rod 401 drives the shrinking rod 204 to move upward synchronously, and at the same time, the sliding connecting rod 403 moves upward along the ramp slider 405. When the heat-sealing mechanism 8 adheres the new film segment to the previous film segment, as shown in FIG. Figure 8 As shown, at this time, the sliding link 403 moves to the ramp of the ramp slider 405. Due to the elastic potential energy of the extrusion spring 404, the sliding link 403 is always in contact with the ramp slider 405. At this time, the sliding link 403 drives the reduction rod 204 away from the central axis of the mounting platform 101, and the reduction rod 204 is out of contact with the previous film segment. At this time, the reduction rod 204 will not affect the normal progress of the blown film winding.

[0046] like Figure 4 As shown, as another preferred embodiment of the present invention, the positioning mechanism 5 includes an extending rod 501 rotatably connected to the two linkage gears 302, the surface of the extending rod 501 contacts the inner wall of the positioning cylinder 502, and a rolling ball is provided at the contact position between the extending rod 501 and the positioning cylinder 502, and a ramp fixing block 503 corresponding to the extending rod 501 is fixedly installed on the inner wall of the positioning cylinder 502.

[0047] In practical application of the embodiment of the present invention, when the film blowing operation is started, Figure 4 As shown, from Figure 4 Looking from the front direction, the positioning drum 502 starts to rotate, and the positioning drum 502 drives the ramp fixing block 503 to rotate synchronously. At this time, the extending rod 501 is driven to move leftward under the action of the ramp of the ramp fixing block 503, and the film pulling mechanism 2 is driven to move leftward to the touch port of the film blowing head 103, so as to achieve the function of automatically reaching the touch port position to perform the film grabbing operation.

[0048] like Figure 2As shown, as another preferred embodiment of the present invention, the film blowing machine also includes a driving mechanism 6, which includes a driving motor 601 installed on the mounting table 101, and a rotating bevel gear 602 is fixedly installed at the output end of the driving motor 601. The rotating bevel gear 602 is meshed with a bevel gear block 603, and the bevel gear block 603 is coaxially fixedly connected to the surface of the positioning drum 502.

[0049] In practical application of the embodiment of the present invention, when performing film blowing operation, such as Figure 2 As shown, at this time, the driving motor 601 starts to move, driving the rotating bevel gear 602 to rotate, and then driving the positioning drum 502 to rotate, and through the action of the positioning mechanism 5, the moving curved rod 201 and the fixed curved rod 202 are driven to move to the film outlet.

[0050] like Figure 1 and Figure 4 As shown, as another preferred embodiment of the present invention, the film blowing machine also includes a lifting mechanism 7, the lifting mechanism 7 includes a rotating screw 701 rotatably connected to the mounting table 101, the rotating screw 701 and the screw moving block 702 form a spiral pair transmission, the surface of the screw moving block 702 is rotatably connected to the positioning rotating cylinder 502, the surface of the screw moving block 702 is fixedly installed with a driving motor 601, the surface of the screw moving block 702 is fixedly installed with a fixed cylinder 307, the interior of the screw moving block 702 is penetrated by an extension rod 501, and the screw moving block 702 is slidably connected to the extension rod 501.

[0051] In practical application, the embodiment of the present invention is as follows: Figure 1 As shown, from Figure 1 When the film grabbing operation is completed, the rotating screw 701 is driven by the external drive to rotate, thereby driving the screw moving block 702 to move upward. Figure 4 As shown, the upward movement of the screw moving block 702 drives the new film upward through the grabbing action of the moving curved rod 201 and the fixed curved rod 202, and stops when the rotating mechanism 3 drives the film pulling mechanism 2 to rotate, thereby achieving the purpose of driving the new film to automatically rise.

[0052] like Fig. 9 As shown, as another preferred embodiment of the present invention, the heat sealing mechanism 8 includes two heat sealing rods 801 slidably connected to the surface of the screw moving block 702 .

[0053] In practical application, the embodiment of the present invention is as follows: Fig. 9 As shown, when the rotating mechanism 3 drives the film pulling mechanism 2 to rotate completely, the previous film segment is located inside the new film, and the external drive drives the two heat sealing rods 801 to move toward each other, thereby heating the film so that the previous film segment and the new film are adhered together.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-speed plastic bag film blowing machine, characterized in that: The film blowing machine comprises: The main frame (1) comprises a mounting platform (101) arranged on the main frame (1), a plurality of slide plates (102) are fixedly mounted on the surface of the mounting platform (101), and a film blowing head (103) is also fixedly mounted on the surface of the mounting platform (101); The film pulling mechanism (2) comprises a plurality of movable curved rods (201) mounted on the mounting platform (101), the surface of each movable curved rod (201) being connected to the output end of the telescopic cylinder (203), the output end of the telescopic cylinder (203) passing through the interior of the fixed curved rod (202) and being slidably connected to the fixed curved rod (202), and a plurality of reducing rods (204) being mounted on the mounting platform (101), the surface of the reducing rods (204) being rotatably mounted with rollers; Rotating mechanism (3): used to drive the film pulling mechanism (2) to rotate and release; Sliding mechanism (4): used to guide the film while the film pulling mechanism (2) is rising; Positioning mechanism (5): used for positioning the film pulling mechanism (2); Heat sealing mechanism (8): used for clamping and heat sealing the film; The rotating mechanism (3) comprises a rotating connecting rod (301) slidably connected to the moving bent rod (201), and a fixed bent rod (202) and a telescopic cylinder (203) are fixedly mounted on the surface of the rotating connecting rod (301), an output end of the telescopic cylinder (203) passes through the rotating connecting rod (301) and is slidably connected to the rotating connecting rod (301), and two linkage gears (302) are fixedly mounted on the surface of the rotating connecting rod (301), each linkage gear (302) meshes with each moving rack (303), and the moving racks (303) are connected to each other. ) is fixedly mounted on the surface of the pressure rod (304), a compression spring (305) is fixedly mounted on the surface of the pressure rod (304), one end of the pressure rod (304) away from the compression spring (305) is rollingly connected to a guide block (306), the inner wall of the guide block (306) is rotatably connected to two balls, the surface of the guide block (306) is slidably connected to the inner wall of the fixed cylinder (307), a return spring (308) is fixedly mounted on the surface of the guide block (306), and a reaction block (309) is fixedly mounted on the surface of the mounting platform (101); The film blowing machine further comprises a lifting mechanism (7), the lifting mechanism (7) comprising a rotating screw (701) rotatably connected to the mounting platform (101), the rotating screw (701) and the screw moving block (702) forming a spiral pair transmission, the surface of the screw moving block (702) being rotatably connected to a positioning rotating cylinder (502), the surface of the screw moving block (702) being fixedly mounted with a driving motor (601), the surface of the screw moving block (702) being fixedly mounted with a fixing cylinder (307), the interior of the screw moving block (702) being penetrated by an extension rod (501), and the screw moving block (702) being slidably connected to the extension rod (501); The heat sealing mechanism (8) comprises two heat sealing rods (801) which are slidably connected to the surface of the screw moving block (702).

2. A high-speed plastic bag film blowing machine according to claim 1, characterized in that: The sliding mechanism (4) comprises a sliding connecting rod (403) fixedly connected to the surface of the reducing rod (204); the surface of the sliding connecting rod (403) is slidably connected to a sliding frame (402); the surface of the sliding frame (402) is fixedly mounted with a lifting rod (401); the surface of the sliding frame (402) is connected to the reducing rod (204) via a compression spring (404); one end of the sliding connecting rod (403) away from the reducing rod (204) contacts the surface of a ramp slider (405); the ramp slider (405) is fixedly mounted on the slide plate (102); and the sliding frame (402) is slidably connected to the inner wall of the slide plate (102).

3. A plastic bag high-speed film blowing machine according to claim 1, characterized in that: The positioning mechanism (5) comprises a protruding rod (501) rotatably connected to the two linkage gears (302); the surface of the protruding rod (501) contacts the inner wall of the positioning rotating cylinder (502); a rolling ball is provided at the contact position between the protruding rod (501) and the positioning rotating cylinder (502); and a ramp fixing block (503) corresponding to the protruding rod (501) is fixedly mounted on the inner wall of the positioning rotating cylinder (502).

4. A high-speed plastic bag film blowing machine according to claim 3, characterized in that: The film blowing machine further comprises a driving mechanism (6), the driving mechanism (6) comprising a driving motor (601) mounted on a mounting platform (101), a rotating bevel gear (602) being fixedly mounted on an output end of the driving motor (601), the rotating bevel gear (602) being meshed with a bevel gear block (603), and the bevel gear block (603) being coaxially fixedly connected to a surface of the positioning drum (502).

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