Double-fly-cutter mechanism of bag making machine
By introducing a dual flying knife mechanism into the bag making machine, and using the drive device to drive the spacing setting of the front and rear blades, efficient cutting of the membrane material is achieved, solving the problem of inefficiency in the prior art, and improving production efficiency and cutting accuracy.
Patent Information
- Application Number
- CN202422114058.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-29
AI Technical Summary
In the existing plastic bag making machines, the tool with the flying knife structure uses vertical blades for one-way cutting, which is inefficient and difficult to meet the needs of efficient production.
A double flying knife mechanism is adopted, including a frame, a compression mechanism and a flying knife mechanism. The two parallel front blades and rear blades on the tool holder are driven to be arranged at intervals along the direction of travel of the membrane material. The first and second pressing devices realize the cutting of the membrane material, and the tool holder moves back and forth to achieve the cutting function and improve production efficiency.
It realizes efficient cutting of the membrane material, improves production efficiency, simplifies the processing technology, avoids the problems of film material adhesion and tension changes, and has a compact structure, so the cutting function can be achieved during the reciprocating process of the tool holder.
Smart Images
Figure CN223058491U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging, in particular to a double flying knife mechanism of a bag making machine. Background Technique
[0002] In the existing plastic bag making machines, the bag making machine generally heats and seals and cuts a plastic film through a heater and a cutting mechanism to manufacture plastic bags; when manufacturing plastic bags with curved sides, the plastic film is intermittently supplied along its length direction. When the plastic film stops, the blade moves towards the plastic film and the support table, and cuts the plastic film located on the support table to manufacture plastic bags; generally, the cutting tool of the current flying knife structure uses a vertical blade for single-cutting, which can only cut in one direction and has low efficiency. Therefore, improvements are needed. Content of the Utility Model
[0003] The purpose of the utility model is to provide a double flying knife mechanism of a bag making machine to solve the problems raised in the above background technique.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A double flying knife mechanism of a bag making machine includes a frame, a pressing mechanism and a flying knife mechanism oppositely arranged in the frame. The flying knife mechanism includes a driving device fixed to the frame and a tool holder connected to the driving device. On both sides of one end of the tool holder close to the pressing mechanism, a blade group is respectively arranged through blade pressing plates. The pressing mechanism includes a first pressing device and a second pressing device arranged in sequence along the traveling direction of the film material of the bag making machine. The first pressing device and the second pressing device are arranged at intervals and form a cutting groove for the blade group to pass through.
[0006] Further, in the double flying knife mechanism of the above bag making machine, the blade group includes two blades arranged in parallel, namely a front blade and a rear blade, and the front blade and the rear blade are arranged at intervals.
[0007] Further, in the double flying knife mechanism of the above bag making machine, the front blade and the rear blade are arranged at intervals along the traveling direction of the film material of the bag making machine through a blade backing plate.
[0008] Further, in the double flying knife mechanism of the above bag making machine, a blanking boss protrudes from one end of the blade backing plate close to the pressing mechanism, and one end of the blanking boss close to the pressing mechanism protrudes from the blade group.
[0009] Further, in the double flying knife mechanism of the above bag making machine, the front blade and the rear blade are arranged at intervals along the traveling direction of the tool holder.
[0010] Further, in the double - flying - knife mechanism of the above - mentioned bag - making machine, the first pressing device includes a first upper pressing plate and a first lower pressing plate which are oppositely arranged. The first upper pressing plate is connected to the frame through a first air cylinder, and the first lower pressing plate is fixed to the frame through a first seat plate. The second pressing device includes a second upper pressing plate and a second lower pressing plate which are oppositely arranged. The second upper pressing plate is connected to the frame through a second air cylinder, and the second lower pressing plate is fixed to the frame through a second seat plate.
[0011] Further, in the double - flying - knife mechanism of the above - mentioned bag - making machine, elastic strips are respectively arranged on the end faces of the first upper pressing plate and the second upper pressing plate close to the corresponding first lower pressing plate and second lower pressing plate.
[0012] Further, in the double - flying - knife mechanism of the above - mentioned bag - making machine, the side surface of the first lower pressing plate close to the cutting groove is arranged at an acute angle with its top surface, and a guiding surface is arranged on one side of the top surface of the second lower pressing plate close to the cutting groove.
[0013] Further, in the double - flying - knife mechanism of the above - mentioned bag - making machine, a chute is also arranged below the cutting groove.
[0014] Further, in the double - flying - knife mechanism of the above - mentioned bag - making machine, the bottom of the frame is connected with a base, and adjusting lead screws are respectively arranged at both ends of the base and are respectively connected to the frame through adjusting seats.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0016] The structure of the present utility model is compact. The cutting function can be realized during the reciprocating process of the tool holder, improving the production efficiency. The pre - placed blade and the post - placed blade are arranged at intervals, and the film material is cut in sequence to complete the trimming work of the packaging bag. Brief Description of the Drawings
[0017] Figure 1 It is a schematic structural diagram of the double - flying - knife mechanism of the bag - making machine in a specific embodiment of the present utility model.
[0018] Figure 2 It is an installation schematic diagram of the pressing mechanism and the flying - knife mechanism in a specific embodiment of the present utility model.
[0019] Figure 3 It is a schematic structural diagram of the tool holder and the blade group in a specific embodiment of the present utility model.
[0020] Figure 4 It is a three - dimensional schematic diagram of the tool holder and the blade group in a specific embodiment of the present utility model.
[0021] Figure 5 It is an exploded schematic diagram of the tool holder and the blade group in a specific embodiment of the present utility model.
[0022] Figure 6 This is a schematic position diagram of the tool holder, blade group and pressing mechanism in a specific embodiment of the present utility model.
[0023] Figure 7 This is a schematic structural diagram of the tool holder, blade group and pressing mechanism in a specific embodiment of the present utility model.
[0024] Figure 8 This is a schematic position diagram of the first pressing device and the second pressing device in a specific embodiment of the present utility model.
[0025] Figure 9 This is a schematic position diagram of the base and the frame in a specific embodiment of the present utility model. Detailed implementation manners
[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0027] Referring to Figures 1 to 9 As shown, a double flying knife mechanism of a bag making machine includes a frame 1, a pressing mechanism and a flying knife mechanism oppositely arranged in the frame 1. The flying knife mechanism includes a driving device 2 fixed to the frame 1 and a tool holder 3 connected to the driving device 2. Blade groups 5 are respectively arranged on both sides of one end of the tool holder 3 close to the pressing mechanism through blade pressing plates 4. The pressing mechanism includes a first pressing device 6 and a second pressing device 7 arranged in sequence along the traveling direction of the film material of the bag making machine. The first pressing device 6 and the second pressing device 7 are arranged at intervals and form a cutting groove for the blade group 5 to pass through.
[0028] In this technical solution, the frame includes a horizontally arranged bottom plate, end plates provided at both ends of the top surface of the bottom plate, and side plates on both sides. Through grooves for accommodating the film material of the bag-making machine / the finished packaging bag are respectively arranged inside the two side plates. The film material of the bag-making machine / the finished packaging bag enters from the side where the first pressing device is located under the conveyance of the bag-making machine. After reaching the set position, the first pressing device and the second pressing device press the film material of the bag-making machine / the finished packaging bag to ensure sufficient tension for smooth cutting. The driving device drives the blade group on the tool holder to cut along the cutting groove. After the cutting is completed, the tool holder does not need to be reset, and the first pressing device and the second pressing device are reset. The film material of the bag-making machine / the finished packaging bag on the side where the second pressing device is located is taken away by an external material taking device or manually. After the subsequent film material of the bag-making machine / the finished packaging bag continues to travel to the set position, the first pressing device and the second pressing device press the film material of the bag-making machine / the finished packaging bag again. The driving device drives the blade group on the tool holder to move in the reverse direction (compared with the previous cutting direction) and complete the cutting, that is, the cutting function can be completed during the reciprocating movement of the tool holder; the driving device is selected as a servo linear module, and the tool holder is connected to the slide table of the driving device through bolts, etc., to improve the accuracy and stability of the tool holder movement. The structure of the present utility model is compact, and the cutting function can be realized during the reciprocating movement of the tool holder, improving the production efficiency.
[0029] Exemplarily, referring to Figures 1 to 6 As shown, the blade group 5 includes two blades arranged in parallel, namely a front blade 51 and a rear blade 52, and there is an interval between the front blade 51 and the rear blade 52.
[0030] In this technical solution, blade groups are respectively arranged on both sides of the bottom end of the tool holder, and the two blade groups respectively cut the film material of the bag-making machine / the finished packaging bag during the reciprocating movement of the tool holder.
[0031] Exemplarily, referring to Figures 1 to 6 As shown, the front blade 51 and the rear blade 52 are arranged at an interval along the traveling direction of the film material of the bag-making machine through a blade backing plate 53.
[0032] In this technical solution, a threaded hole and a positioning pin are provided in the tool holder, a counterbore and a pin hole are provided in the blade pressing plate, and the blade backing plate, the front blade and the rear blade are fixed by bolts. Through holes corresponding to the positioning pin and the bolt are respectively provided in the blade backing plate, the front blade and the rear blade to avoid interference. Step surfaces corresponding to the front blade and the rear blade are respectively provided on both side surfaces of the blade backing plate, which facilitates the quick positioning and installation of the front blade and the rear blade, and at the same time provides support for the front blade and the rear blade to prevent displacement caused by the reaction force of the front blade and the rear blade during the cutting process, improving the cutting accuracy. Both the front blade and the rear blade are arranged at an angle of 45° with respect to the film material of the bag-making machine / the finished packaging bag, improving the cutting effect; the front blade and the rear blade are arranged at intervals along the traveling direction of the film material of the bag-making machine, and the cutting of both sides of the film material of the bag-making machine / the finished packaging bag is completed simultaneously, cutting off the redundant waste edges on the sides of the film material of the bag-making machine / the finished packaging bag, eliminating the need for separate treatment later, simplifying the processing technology and improving production efficiency.
[0033] Exemplarily, referring to Figures 1 to 6 As shown, a blanking boss 531 protrudes from one end of the blade backing plate 53 close to the pressing mechanism, and one end of the blanking boss 531 close to the pressing mechanism protrudes beyond the blade group 5.
[0034] In this technical solution, the bottom end of the blanking boss protrudes beyond the bottom ends of the front blade and the rear blade and is located between the two blade groups. After the front blade and the rear blade complete the cutting of the waste edge, the blanking boss squeezes the waste edge to avoid problems such as the waste edge and the film material of the bag-making machine / the finished packaging bag not being separated due to adhesion, etc.
[0035] Exemplarily, referring to Figures 1 to 6 As shown, the front blade 51 and the rear blade 52 are arranged at intervals along the traveling direction of the tool holder 3.
[0036] In this technical solution, the front blade and the rear blade in each blade group are arranged in a staggered manner front and back (along the traveling direction of the tool holder). The front blade first contacts the film material of the bag-making machine / the finished packaging bag and completes partial cutting, and then the rear blade contacts the film material of the bag-making machine / the finished packaging bag, avoiding problems such as excessive tension changes caused by the front blade and the rear blade acting on the film material of the bag-making machine / the finished packaging bag simultaneously.
[0037] Exemplarily, referring to Figure 2 、 Figures 6 to 8 As shown, the first pressing device 6 includes a first upper pressing plate 61 and a first lower pressing plate 62 arranged opposite to each other. The first upper pressing plate 61 is connected to the frame 1 through a first air cylinder 63, and the first lower pressing plate 62 is fixed to the frame 1 through a first seat plate 64. The second pressing device 7 includes a second upper pressing plate 71 and a second lower pressing plate 72 arranged opposite to each other. The second upper pressing plate 71 is connected to the frame 1 through a second air cylinder 73, and the second lower pressing plate 72 is fixed to the frame 1 through a second seat plate 74.
[0038] In this technical solution, to ensure the distance between the second pressing device and the first device, the second pressing device is connected to the inner wall of the side plate provided with the driving device through the inner wall plate. The inner wall plate is arranged on the inner wall of the corresponding side plate through bolts and pads. A through groove for the film material / bag finished product of the bag making machine to pass through is arranged in the inner wall plate. The first seat plate and the second seat plate are respectively arranged on the corresponding side plate and inner wall plate through bolts. The first lower pressing plate and the second lower pressing plate are respectively fixed to the corresponding first seat plate and second seat plate through bolts, etc. The first air cylinder and the second air cylinder can use existing push rod air cylinders. The first upper pressing plate and the second upper pressing plate are respectively connected to the push plates of the corresponding first air cylinder and second air cylinder through bolts, etc. The first air cylinder and the second air cylinder are fixed to the corresponding side plate and inner wall plate through conventional air cylinder seats and bolts, etc.
[0039] Exemplarily, refer to Figure 2 、 Figures 6 to 8 As shown, elastic strips are respectively arranged on the end faces of the first upper pressing plate 61 and the second upper pressing plate 71 close to the corresponding first lower pressing plate 62 and second lower pressing plate 72.
[0040] In this technical solution, the elastic strips are made of conventional flexible materials such as foam. Installation grooves are arranged on one side of the bottom surfaces of the first upper pressing plate and the second upper pressing plate close to the cutting groove. The elastic strips are fixed in the installation grooves by means of glue, etc. The bottom surfaces of the elastic strips protrude from the bottom surfaces of the corresponding first upper pressing plate and second upper pressing plate. The film material / bag finished product of the bag making machine is pressed by the elastic strips to avoid damaging the surface of the film material / bag finished product of the bag making machine.
[0041] Exemplarily, refer to Figures 6 to 8 As shown, the side surface of the first lower pressing plate 62 close to the cutting groove is arranged at an acute angle with its top surface. A guiding surface is arranged on one side of the top surface of the second lower pressing plate 72 close to the cutting groove.
[0042] In this technical solution, the side surface of the first lower pressing plate close to the cutting groove is arranged at an acute angle with the top surface of the first lower pressing plate, that is, it gradually moves away from the second pressing device from top to bottom. Only the side edge of the top surface of the first lower pressing plate close to the second pressing device is attached to or close to the corresponding side surface of the rear blade. The front blade is arranged on the side close to the second pressing device. Before cutting, the film material / bag finished product of the bag making machine is fixed by the first pressing device and the second pressing device, and has sufficient tension to ensure the normal progress of cutting. After the front blade completes partial cutting, the rear blade is attached to the first lower pressing plate and can still smoothly complete the cutting of the corresponding part. After cutting is completed, the subsequent film material / bag finished product of the bag making machine continues to be conveyed by the bag making machine and enters the second pressing device through the guiding surface.
[0043] Exemplarily, refer to Figure 1 and Figure 2 as well as Figures 6 to 9As shown, it further includes a chute 8 disposed below the cutting groove.
[0044] In this technical solution, the chute is processed by processes such as sheet metal from a metal plate, etc., and is fixed to the side of the inner wall plate by screws, etc., for guiding the waste edges after cutting. The end of the chute is matched with a conventional trash can or collection box, etc., to facilitate the concentration of waste edges.
[0045] Exemplarily, see Figure 1 and Figure 2 as well as Figure 9 As shown, a base 9 is connected to the bottom of the frame 1. Adjusting screws 91 are respectively arranged at both ends of the base 8, and are respectively connected to the frame 1 through adjusting seats 92.
[0046] In this technical solution, the base is fixed to the line body of the bag making machine by bolts, etc. A waist-shaped hole is processed in the bottom plate of the frame and is connected to the base through a locking bolt. When it is necessary to adjust the position of the flying knife mechanism on the bag making machine, loosen the locking bolt, rotate the adjusting screw through a conventional handwheel, etc., so as to adjust the position of the flying knife mechanism through the adjusting seat. After the adjustment is completed, lock the locking bolt. The adjusting seat is fixed to the bottom plate of the frame by bolts, etc., and a thread corresponding to the adjusting screw is arranged in the adjusting seat.
[0047] In summary, the structure of the present utility model is compact, and the cutting function can be realized during the reciprocating process of the tool holder, improving the production efficiency. The pre-positioned blade and the post-positioned blade are arranged at intervals to cut the film material in sequence, and the edge trimming work of the packaging bag is completed.
[0048] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.
[0049] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present application.
Claims
1. A double flying knife mechanism of a bag making machine, characterized in that: It includes a frame, as well as a pressing mechanism and a flying knife mechanism oppositely arranged inside the frame. The flying knife mechanism includes a driving device fixed to the frame and a tool holder connected to the driving device. At both sides of one end of the tool holder close to the pressing mechanism, blade groups are respectively arranged through blade pressing plates. The pressing mechanism includes a first pressing device and a second pressing device arranged in sequence along the traveling direction of the film material of the bag-making machine. The first pressing device and the second pressing device are arranged at intervals and form a cutting groove for the blade groups to pass through.
2. The double flying knife mechanism of a bag making machine according to claim 1, characterized in that, The blade group includes two blades arranged in parallel, namely a front blade and a rear blade, and the front blade and the rear blade are arranged at intervals.
3. The double flying knife mechanism of a bag making machine according to claim 2, characterized in that, The front blade and the rear blade are arranged at intervals along the traveling direction of the film material of the bag-making machine through a blade backing plate.
4. The double flying knife mechanism of a bag making machine according to claim 3, characterized in that, One end of the blade backing plate close to the pressing mechanism protrudes with a blanking boss, and one end of the blanking boss close to the pressing mechanism protrudes beyond the blade group.
5. The double flying knife mechanism of a bag making machine according to claim 2, characterized in that, The front blade and the rear blade are arranged at intervals along the traveling direction of the tool holder.
6. The double flying knife mechanism of a bag making machine according to claim 1, characterized in that, The first pressing device includes a first upper pressing plate and a first lower pressing plate oppositely arranged. The first upper pressing plate is connected to the frame through a first air cylinder, and the first lower pressing plate is fixed to the frame through a first seat plate. The second pressing device includes a second upper pressing plate and a second lower pressing plate oppositely arranged. The second upper pressing plate is connected to the frame through a second air cylinder, and the second lower pressing plate is fixed to the frame through a second seat plate.
7. The double flying knife mechanism of a bag making machine according to claim 6, characterized in that, Elastic strips are respectively arranged on the end faces of the first upper pressing plate and the second upper pressing plate close to the corresponding first lower pressing plate and second lower pressing plate.
8. The double flying knife mechanism of a bag making machine according to claim 6, characterized in that, One side of the first lower pressing plate close to the cutting groove is arranged at an acute angle with its top surface, and a guiding surface is arranged on one side of the top surface of the second lower pressing plate close to the cutting groove.
9. The double flying knife mechanism of a bag making machine according to claim 1, characterized in that, It also includes a chute arranged below the cutting groove.
10. The double flying knife mechanism of a bag making machine according to claim 1, characterized in that, The bottom of the frame is connected with a base, and adjusting lead screws are respectively arranged at both ends of the base and are respectively connected to the frame through adjusting seats.