A method of toasting a film

Abstract

The present application relates to the technical field of food packaging, in particular to a toast film pasting method; comprising the following steps: S1: cutting and filling toast according to setting; S2: starting an automatic film pasting machine to paste film on toast through the automatic film pasting machine; S3: packing toast with pasted film. Wherein the automatic film pasting machine in step S2 comprises a conveying device for conveying toast, a film feeding assembly arranged above the conveying device, and a film cutting assembly connected with the discharge end of the film feeding assembly, characterized in that further comprising: a film feeding conveying device for providing adsorption force to the film material passing through the film cutting assembly, the film feeding conveying device being arranged at the discharge end of the film feeding assembly; an electric control device for triggering control of synchronous conveying of the film feeding conveying device and the conveying device; the discharge end of the film feeding conveying device is arranged opposite to the discharge end of the conveying device; and the film feeding conveying device is a negative pressure film feeding conveying device. The toast film pasting efficiency can be improved, and the sales quality of toast can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of food packaging technology, in particular to a toast film pasting method. BACKGROUND

[0002] Toast is a kind of western bread, the raw material is square bread, which is baked in a toaster until it is fragrant, and then the butter, butter, jam and other ingredients are pasted on one side of the square bread, and the two square breads are clamped together to form a toast, which is hot food. The toast on the market is generally not pasted with film before packaging. During transportation, the jam and other ingredients on the toast will adhere to the inner surface of the packaging bag, affecting the quality of the toast.

[0003] The invention patent with application number 201510721997.4 discloses a film pasting device for food packaging, which comprises a conveying mechanism, a film pasting mechanism and a pushing mechanism. The conveying mechanism comprises a first conveying belt and a second conveying belt, which are arranged at an angle of 90°. The film pasting mechanism comprises a processing table, a rotating shaft, a supporting arm and a film pasting rod. The processing table is arranged between the output end of the first conveying belt and the input end of the second conveying belt. A support is arranged on the side of the processing table away from the second conveying belt. The supporting arm is fixedly connected to the middle of the rotating shaft. The two ends of the supporting arm are respectively connected to the film pasting rod. The film pasting rod is located on both sides of the processing table. A cutter for cutting the preservative film on the food is arranged between the film pasting rod close to the support and the processing table. The pushing mechanism comprises a cam mechanism and a push block for pushing the food. The push block is connected to the cam mechanism. By implementing this technical solution, the problems of food hygiene hazards and high labor intensity in the existing food packaging process are solved.

[0004] The above-mentioned technology pushes the food to the designated position for film pasting by the push block. For food with hard texture, pushing will not affect its appearance. However, for toast and other pastries with soft texture and appearance requirements, the appearance may be damaged when stressed, and the ingredients on top may also be disturbed, which seriously affects the sales quality of toast. If manual film pasting is used, it will be time-consuming and laborious. Therefore, there is a need for a film pasting method for toast that can efficiently paste film on toast. SUMMARY

[0005] The present application provides a toast film pasting method, which can improve the film pasting efficiency of toast and improve the sales quality of toast.

[0006] In order to solve the above-mentioned technical problems, the present application provides the following technical solutions: 1. A toast film pasting method, characterized in that it comprises the following steps:

[0007] S1: cutting and filling toast according to the setting;

[0008] S2: starting an automatic film pasting machine and pasting film on the toast by the automatic film pasting machine;

[0009] S3: packing the toast with the film.

[0010] The automatic film pasting machine in step S2 comprises a conveying device for conveying the toast, a film feeding assembly arranged above the conveying device, and a film cutting assembly connected with the discharge end of the film feeding assembly, and further comprises:

[0011] a film feeding conveying device for providing adsorption force for the film material passing through the film cutting assembly, the film feeding conveying device being arranged at the discharge end of the film feeding assembly; an electric control device for triggering and controlling the film feeding conveying device and the conveying device to convey synchronously; the discharge end of the film feeding conveying device is arranged opposite to the discharge end of the conveying device; and the film feeding conveying device is a negative pressure film feeding conveying device.

[0012] The basic principle and beneficial effects of the present scheme are as follows: the toast is cut into pieces, the raw materials such as jam are added to the upper standby, the toast is conveyed by the conveying device, the film material is conveyed in the same direction by the film feeding assembly, the film material is cut into film pieces with a size suitable for the toast by the film cutting assembly, the film feeding conveying device is arranged at the discharge end of the film feeding assembly, and can provide adsorption force for the film material passing through the film cutting assembly, the film pieces cut are conveyed by the film feeding conveying device, so that the film pieces can smoothly leave the film feeding assembly, thereby solving the problem that the film pieces are rolled into the rear of the film feeding assembly due to static electricity. The film feeding conveying device and the conveying device are triggered and controlled to convey synchronously by the electric control device, and the discharge end of the film feeding conveying device is arranged opposite to the discharge end of the conveying device, so that the film pieces conveyed by the film feeding conveying device are just covered on the surface of the toast conveyed by the discharge end of the conveying device, the products with the film pasted are continuously conveyed, thereby completing the film pasting action, continuously working, higher working efficiency, ensuring that the jam in the toast packaging does not stick to the inner packaging bag, ensuring the appearance and integrity of the toast, ensuring that the customer does not get dirty when eating, and ensuring the cleanliness of eating.

[0013] Further, the negative pressure film feeding device comprises a connecting support, a negative pressure mechanism and a conveying belt mechanism installed on the connecting support; the negative pressure mechanism comprises a negative pressure frame and a negative pressure generator, both of which are installed on the connecting support, and the negative pressure generator is connected with the negative pressure frame at a negative pressure output end, so that a negative pressure environment is formed in the negative pressure frame; the conveying belt mechanism comprises a conveying power member and a conveying belt, the conveying power member is installed on the connecting support, and the conveying belt is connected with the power output end of the conveying power member in power, a plurality of air holes are formed on the surface of the conveying belt, the conveying belt covers the frame opening surface of the negative pressure frame, and the negative pressure generator can provide adsorption force for the film material on the conveying belt through the air holes, so that the film material is conveyed along with the conveying belt; the negative pressure film feeding device further comprises a second tension adjusting bias screw for adjusting the tightness of the conveying belt.

[0014] Further, the automatic film pasting machine comprises a feeding assembly for installing a film roll and a film passing assembly for guiding and flattening the film material, and the feeding assembly, the film passing assembly, the film feeding assembly and the film cutting assembly are sequentially arranged along the film material conveying direction; the automatic film pasting machine further comprises a supporting side plate and a height adjusting device connected with the supporting side plate and used for adjusting the height of the film feeding assembly, the film passing assembly and the film cutting assembly.

[0015] Further, the feeding assembly comprises a spool installed on the supporting side plate and a locking member for fixing the film roll; the film passing assembly comprises a plurality of rollers installed on the supporting side plate and a limiting sleeve sleeved on the rollers, the film material is threaded on the outer surfaces of the rollers and the axial position of the film material is limited by the limiting sleeve.

[0016] Further, the automatic film pasting machine comprises a main frame, and the conveying device, the film feeding assembly, the film cutting assembly, the film feeding device and the electric control device are installed on the main frame.

[0017] The film feeding device comprises a driving roller, a driven roller and a gap adjusting member for adjusting the radial position of the driven roller, the driving roller and the driven roller are arranged side by side, and a gap suitable for the film material to pass through is arranged between the driving roller and the driven roller.

[0018] The film cutting assembly comprises a base, a fixed knife installed on the base, an elastic extrusion member and a linear moving member, the linear moving member is provided with a moving end capable of moving towards the fixed knife or away from the fixed knife, the moving end is installed with a movable knife, the movable knife is provided with an extension plate, the extension plate abuts against the fixed knife, and when the moving end moves towards the fixed knife, the cutting edge of the movable knife is tangent to the cutting edge of the fixed knife.

[0019] The elastic extruding piece is in abutment with the extending plate, and the extruding force of the elastic extruding piece is directed towards the fixed cutter to keep the extending plate in abutment with the fixed cutter.

[0020] Further, the elastic extruding piece comprises a spring and a movable frame, the movable frame is hinged to the base, one end of the spring is mounted on the base, the other end is in abutment with one side of the movable frame, and the other side of the movable frame is capable of being in abutment with the extending plate under the elastic force of the spring;

[0021] The movable frame is L-shaped, one end of the movable frame is hinged to the base, the other end of the movable frame is connected to the end of the spring away from the base, and a pressing block is arranged at the corner of the movable frame, the pressing block is in abutment with the extending plate and extrudes the extending plate in the direction of the fixed cutter under the elastic force of the spring.

[0022] Further, the linear moving piece comprises a moving frame, a driving piece, a guide piece and a transmission rod, the moving frame is the moving end, the moving frame is in sliding fit with the base, the movable cutter is mounted on the moving frame, the driving piece is fixed opposite to the base, the driving end of the driving piece is connected to the guide piece, one end of the transmission rod is hinged to the position of the guide piece away from the driving piece, and the other end is hinged to the moving frame, the driving piece, the guide piece, the transmission rod and the moving frame form a crank slider structure to drive the moving frame to move linearly.

[0023] Further, the guide piece is an eccentric wheel, the eccentric wheel rotates coaxially with the driving end of the driving piece, and one end of the transmission rod is hinged to the side surface of the eccentric wheel;

[0024] The base is provided with a sliding rail, the length direction of the sliding rail is parallel to the moving direction of the moving frame, the moving frame is provided with a sliding block, and the sliding block is in sliding fit with the sliding rail.

[0025] Further, the conveying device comprises a power piece, a driving shaft, a driven shaft and a conveying belt sleeved on the outer periphery of the driving shaft and the driven shaft, the power piece is in power connection with the driving shaft; the conveying device further comprises a first tension adjusting bias screw for adjusting the conveying belt;

[0026] The electric control device comprises a frequency converter, a PLC controller and an operation screen, the operation screen is electrically connected with the frequency converter, the PLC controller, the conveying device, the film feeding assembly, the film cutting assembly and the film feeding conveying device.

[0027] Further, before the automatic film pasting machine is started, the automatic film pasting machine needs to be detected, and the detection method is as follows:

[0028] S11: exclude the abnormality of the conveying device:

[0029] S111: When the conveyor belt is not running, check whether the input parameters under the corresponding conveyor speed item on the operation panel are correct, check whether the corresponding conveyor start button is turned on, check whether the conveyor device is blocked by foreign objects, and check whether the conveyor belt tension is too high.

[0030] S112: When the conveyor belt slips during operation: Stop the machine and check if the conveyor belt is tensioned. If the tension is insufficient, adjust the tension of the conveyor device through the first tension adjustment bolt. During the tension adjustment process, pay attention to ensuring that the tension on both sides of the belt edge is consistent.

[0031] S113: When the conveyor belt deviates during operation, stop the machine for adjustment. Adjust the belt using the first tensioning bolt until it is loosened. Readjust the belt and ensure that the guide bars inside the belt are in the running grooves of each wheel set and the conveyor frame. Then gradually tension the belt. During the tensioning process, pay attention to ensuring that the tension on both sides of the belt is consistent.

[0032] S12: Troubleshooting abnormalities in the negative pressure film conveyor belt:

[0033] S121: Conveyor belt not running: Check if the input parameters on the right side of the corresponding film pulling speed item on the operation panel are correct, check if the conveyor device is blocked by foreign objects, and check if the conveyor belt tension is too high.

[0034] S122: The conveyor belt is slipping: Stop the machine and check if the conveyor belt is tensioned. If the tension is insufficient, find the second tensioning bolt and adjust it to tension. During the tension adjustment process, pay attention to ensuring that the tension on both sides of the belt edge is consistent.

[0035] S123: The conveyor belt is running off track: Stop the machine and adjust it. Locate the second tensioning bolt and adjust it until the conveyor belt is loosened. Readjust the conveyor belt and ensure that the guide bars inside the conveyor belt are in the running grooves of each wheel set and the conveyor frame. Then gradually tension the conveyor belt. During the tensioning process, pay attention to keeping the tension on both sides of the belt consistent.

[0036] S124: Conveyor belt does not adhere to film: Stop the machine and check if the air pump inside the machine is turned on, and check if the hose connector is loose or has fallen off.

[0037] S13: Abnormal film cutting is eliminated; the fixed blade and the movable blade cooperate to form a cutting blade;

[0038] S131: When the cutter is not running: check whether the input parameters under the corresponding cutter speed and cutter stroke on the operation screen are correct, check whether the servo motor is in the original position, and reset the cutter.

[0039] S132: cutting film cutting unbroken phenomenon: check whether the cutting knife edge is worn, notch; check whether the cutting knife is crossed in place when running; check whether the cutting knife is pressed by the cutting knife bearing, and whether the cutting knife edge is aligned when moving. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a flow chart of the method of embodiment 1 of the present application;

[0041] Figure 2 is a perspective view of the automatic film laminating machine in embodiment 1 of the present application;

[0042] Figure 3 is Figure 2 a structural schematic view of the negative pressure film conveying device shown in the figure;

[0043] Figure 4 is Figure 3 a structural schematic view from another side view angle;

[0044] Figure 5 is Figure 4 an enlarged schematic view of position A in the figure;

[0045] Figure 6 is a rear view of the automatic film laminating machine of another embodiment of the present application;

[0046] Figure 7 is a structural schematic view of the film conveying device, negative pressure film conveying device and film passing assembly in another embodiment of the present application;

[0047] Figure 8 is a structural schematic view of the film cutting assembly in another embodiment of the present application;

[0048] Figure 9 is Figure 8 a structural schematic view from another side view angle;

[0049] Figure 10 is Figure 8 a front view of the figure;

[0050] Figure 11 is another embodiment in Figure 1 an enlarged schematic view of position B in the figure. DETAILED DESCRIPTION

[0051] The following will be further described in detail through specific embodiments:

[0052] Explanation of reference numerals: 10, conveying device; 11, driving shaft; 12, driven shaft; 13, conveying belt; 20, film feeding assembly; 21, driving roller; 22, driven roller; 30, film cutting assembly; 31, base; 311, opening; 312, sliding rail; 32, fixed knife; 33, elastic extrusion piece; 331, spring; 332, movable frame; 34, movable knife; 35, linear moving piece; 351, moving frame; 352, driving piece; 353, guide piece; 354, transmission rod; 355, sliding block; 36, extending plate; 37, pressing block; 38, pressing roller; 40, negative pressure film feeding conveying device; 41, connecting support; 411, connecting shaft; 42, negative pressure mechanism; 421, negative pressure frame; 422, air suction interface; 43, conveying belt mechanism; 431, conveying belt; 432, tensioning roller; 433, air hole; 44, overturning mechanism; 441, rotating piece; 442, coupling; 50, electric control device; 51, operation screen; 60, feeding assembly; 61, reel; 62, locking piece; 70, film passing assembly; 71, roller; 72, limiting sleeve; 80, height adjusting device; 81, lead screw; 82, hand wheel; 90, supporting side plate; 100, main frame; 101, first tensioning adjusting bolt; 102, pressing seat; 103, pressing head.

[0053] Embodiment one is as shown in the accompanying drawings Figure 1

[0054] S1: toast according to the set cutting, filling;

[0055] Operation adjustment and troubleshooting of each functional part of the automatic film pasting machine:

[0056] Conveying device start-stop: click

automatic picture

automatic picture

[0057] , and click the

conveying start

conveying stop

[0058] The input parameter value under the "conveying speed" item directly controls the horizontal conveying motor speed. If the conveying speed needs to be increased or decreased,

[0059] a new value can be directly input to change the speed, so as to change the conveying device running speed.

[0060] Conveying device abnormality troubleshooting:

[0061] S11: troubleshoot the conveying device abnormality:

[0062] ​S111: When the conveying belt is not running, check whether the input parameters under the conveying speed item of the operation screen are correct, check whether the corresponding conveying start button is on, check whether the conveying device is stuck by foreign matter, and check whether the tension of the conveying belt is too large;

[0063] S112: When the conveying belt is running with a slipping phenomenon, stop and check whether the conveying belt is tensioned, if the tension is insufficient, adjust the tension of the conveying device through the first tension adjusting screw, and pay attention to keeping the tension of the edges of the two sides of the belt consistent during the adjustment of the tension;

[0064] S113: When the conveying device is running with a deviation phenomenon, stop and adjust, adjust the first tension adjusting screw until the conveying belt is loosened, readjust the conveying belt, ensure that the inner guide strips of the conveying belt are located in the running grooves of each wheel group and the conveying frame body, and then gradually tension the conveying belt, and pay attention to keeping the tension of the edges of the two sides of the belt consistent during the adjustment of the tension;

[0065] S12: Adjust and exclude abnormalities of the negative pressure film conveying belt:

[0066] Conveying belt speed setting: click

Automatic picture

Automatic picture

[0067] S121: The conveying belt is not running: check whether the input parameters on the right side of the corresponding film pulling speed item of the operation screen are correct, check whether the conveying device is stuck by foreign matter, and check whether the tension of the conveying belt is too large.

[0068] S122: The conveying belt is running with a slipping phenomenon: stop and check whether the conveying belt is tensioned, if the tension is insufficient, find the second tension adjusting screw and adjust the tension, and pay attention to keeping the tension of the edges of the two sides of the belt consistent during the adjustment of the tension;

[0069] S123: The conveying belt is running with a deviation phenomenon: stop and adjust, find the second tension adjusting screw, adjust it until the conveying belt is loosened, readjust the conveying belt, ensure that the inner guide strips of the conveying belt are located in the running grooves of each wheel group and the conveying frame body, and then gradually tension the conveying belt, and pay attention to keeping the tension of the edges of the two sides of the belt consistent during the adjustment of the tension;

[0070] S124: The conveying belt does not absorb the film phenomenon: stop and check whether the air suction pump in the machine body is turned on, and check whether the hose joint is loose and falls off;

[0071] S13: Abnormality exclusion of film cutting; the fixed knife and the movable knife cooperate to form a cutting knife;

[0072] S131: When the cutter is not running: check if the input parameters under the corresponding cutter speed, cutter stroke item of operation screen are correct, check if the servo motor is at the original position, reset the cutter;

[0073] S132: When the film cutting is not continuous: check if the cutter edge is worn or has a gap; check if the cutter is in place when running; check if the cutter is in place when running;

[0074] Check if the cutter is pressed by the cutter bearing, and if the cutter edge is aligned when moving.

[0075] S2: Start the automatic film applicator, and pass the toast through the automatic film applicator for film application;

[0076] S3: Pack the toast with applied film.

[0077] As Figure 2 , the automatic film applicator used in the present application is schematically shown, as shown in the figure, which includes a main frame 100, a conveying device 10 installed on the main frame 100, a film feeding assembly 20, a film cutting assembly 30, a film feeding conveying device, and an electric control device 50, the conveying device 10 is used for conveying toast. The automatic film applicator can be used for toasts, cakes and other pastries with jam on the surface for film application, realizing pre-packaging process, preventing jam from adhering to the inner surface of the packaging bag, affecting the quality of toast, and ensuring the cleanliness, hygiene and appearance of toast products. The conveying device 10 adopts a power element (not shown in the figure), a driving shaft 11, a driven shaft 12 and a conveying belt 13, the driving shaft 11 is driven to rotate by the power element, the outer peripheral conveying belt 13 is driven to convey around the driving shaft 11 and the driven shaft 12, realizing the conveying function of toast. In this embodiment, the toast products are conveyed for the next film application pre-packaging process.

[0078] The film feeding assembly 20 is arranged above the conveying device 10, the film cutting assembly 30 is connected with the discharging end of the film feeding assembly 20, the film material is conveyed to the film cutting assembly 30 through the film feeding assembly 20, the film cutting assembly 30 is used for cutting the conveyed film material, the cutting size is determined according to the size of the toast, the film feeding conveying device is arranged at the discharging end of the film feeding assembly 20, and the film feeding conveying device provides adsorption force for the film material conveyed through the film cutting assembly 30, the cut film pieces can be conveyed by the film feeding conveying device, so that the film pieces can smoothly leave the film feeding assembly 20, thereby solving the problem that the film pieces are rolled into the rear of the film feeding assembly 20 by the roller due to static electricity. The electric control device 50 adopts a frequency converter, a PLC controller (not shown in the figure) and an operation screen 51, the operation screen 51 is electrically connected with the frequency converter, the PLC controller and the power components of the conveying device 10, the film feeding assembly 20, the film cutting assembly 30 and the film feeding conveying device. When it is sensed that the toast is conveyed to the discharging end by the conveying device 10, the film feeding conveying device is triggered to convey the cut film pieces to the discharging end, so as to realize synchronous conveying of the film feeding conveying device and the conveying device 10 through the electric control device 50, the discharging end of the film feeding conveying device is arranged opposite to the discharging end of the conveying device 10, so that the film pieces conveyed by the film feeding conveying device are just covered on the surface of the toast to be pasted with the film conveyed by the discharging end of the conveying device 10, the toast pasted with the film is continuously conveyed forward, so as to complete the film pasting action, thereby continuously working, the working efficiency is higher, and the film pasting speed is as high as 80 to 100 pieces per minute.

[0079] In the embodiment, the film feeding conveying device is a negative pressure film feeding conveying device 40, which is used for adsorbing the film material. As shown in Figures 3 to 5As shown, the negative pressure film conveying device 40 comprises a connecting bracket 41, a negative pressure mechanism 42 and a conveying belt mechanism 43 installed on the connecting bracket 41, the negative pressure mechanism 42 comprises a negative pressure frame 421 and a negative pressure generator (not shown in the figure), both of which are installed on the connecting bracket 41, the side of the negative pressure frame 421 is provided with an air suction interface 422, the negative pressure output end of the negative pressure generator is connected with the air suction interface 422, so that the negative pressure output end is connected with the inner cavity of the negative pressure frame 421, thereby enabling the negative pressure frame 421 to form a negative pressure environment; the conveying belt mechanism 43 comprises a conveying power member and a transmission belt 431, the conveying power member comprises a driving device (not shown in the figure) and two tensioning rollers 432, the driving device can adopt a structure with driving rotation function such as a servo motor, a stepping motor, a direct current motor and a motor, the driving device is installed on the connecting bracket 41, the driving device has a driving end, both of the two tensioning rollers 432 are rotatably installed on the connecting bracket 41, both of the two tensioning rollers 432 are distributed on both sides of the connecting bracket 41 along the conveying direction of the transmission belt 431, one of the two tensioning rollers 432 is coaxially rotatable with the driving end of the driving device, the coaxial rotation can be that the tensioning roller 432 is directly connected with the driving end of the driving device, or that the tensioning roller 432 is indirectly connected with the driving end of the driving device through a shaft coupling, the transmission belt 431 is sleeved on the outer periphery of the two tensioning rollers, and the transmission belt 431 is arranged in an inclined state. Figure 5 As shown, a plurality of air holes 433 are formed in the surface of the transmission belt 431, the transmission belt 431 covers the frame opening surface of the negative pressure frame 421, and the negative pressure generator can provide suction force for the film material on the transmission belt 431 through the air holes 433, so that the film material is conveyed along with the transmission belt 431. The plurality of air holes 433 are uniformly distributed on the surface of the transmission belt 431 to provide uniform suction force.

[0080] As shown in Figure 3 and Figure 4 The negative pressure film conveying device 40 further comprises a turnover mechanism 44, the connecting bracket 41 is connected to the rotating end of the turnover mechanism 44 to realize the function of overturning the connecting bracket 41. The turnover mechanism 44 comprises a fixed frame (not shown in the figure) and a rotating member 441, the rotating member 441 adopts a structure with rotating function such as a servo motor, a stepping motor and a motor, the rotating member 441 is installed on the fixed frame, the rotating member 441 has a rotating end, the rotating end is connected with the connecting bracket 41, the connecting bracket 41 is provided with a connecting shaft 411, and the rotating end of the rotating member 441 is connected with the connecting shaft 411 through a shaft coupling 442, so as to drive the connecting bracket 41 to perform overturning movement by the rotating member 441.

[0081] In another embodiment, as shown in Figure 2 and Figure 6As shown, the automatic film sticking machine further comprises a feeding assembly 60, a film passing assembly 70, a support side plate 90 and a height adjusting device 80, the feeding assembly 60 is used for mounting a film roll, the film passing assembly 70 is used for guiding and flattening the film material, the feeding assembly 60, the film passing assembly 70, the film feeding assembly 20 and the film cutting assembly 30 are sequentially arranged along the film material conveying direction; the height adjusting device 80 is connected with the support side plate 90, the height adjusting device 80 comprises a power member, a lead screw 81 which is power-connected with the power member and a sliding block (not shown in the figure) which is slidingly connected with the lead screw 81, the lead screw 81 is vertically arranged, the support side plate 90 is fixedly connected with the sliding block, the film feeding assembly 20, the film passing assembly 70 and the film cutting assembly 30 are mounted on the support side plate 90, in this case, the power member is connected with the lead screw 81 by a hand wheel 82, of course, in other embodiments, a motor drive can also be used, the lead screw 81 is driven to rotate by the hand wheel 82, so that the support side plate 90 moves up and down relative to the lead screw 81 along with the sliding block, so as to realize the height adjusting device 80 adjusting the height position of the film feeding assembly 20, the film passing assembly 70 and the film cutting assembly 30, so as to adapt to the film sticking process of the toast products with different thicknesses.

[0082] As shown in Figure 2 and Figure 7 shown, the feeding assembly 60 comprises a spool 61 mounted on the support side plate 90 and a locking member 62 for fixing the film roll, the film roll is sleeved on the spool 61, the locking member 62 comprises a movable lock head, which can quickly fix and disassemble the film roll, so as to realize the quick installation and disassembly of the film roll. The film passing assembly 70 comprises a plurality of rollers 71 mounted on the support side plate 90 and a limiting sleeve 72 sleeved on the rollers 71, the plurality of rollers 71 are vertically mounted on the support side plate 90, the film material is threaded on the outer surfaces of the plurality of rollers 71 and is limited in the axial position by the limiting sleeve 72, which is used for guiding and limiting the flat film material.

[0083] In this embodiment, referring to 6, the film feeding device comprises a driving roller 21, a driven roller 22 and a gap adjusting member (not shown in the figure), the driving roller 21 is driven by a power member, the driving roller 21 and the driven roller 22 are arranged side by side, both of which are directly provided with a gap suitable for the film material to pass through, and the size of the gap between the driving roller 21 and the driven roller 22 can be adjusted by adjusting the radial position of the driven roller 22 through the gap adjusting member, so as to clamp or loosen the film material.

[0084] Referring to Figures 8 to 10The film cutting assembly 30 comprises a base 31, a fixed blade 32, a linear moving piece 35, a movable blade 34 and an elastic extruding piece 33. The fixed blade 32 is installed on the base 31. The linear moving piece 35 has a moving end capable of moving towards the direction close to or away from the fixed blade 32. The movable blade 34 is installed on the moving end of the linear moving piece 35. The movable blade 34 is integrally connected with an extension plate 36 on one side. The side of the extension plate 36 is coplanar with the side of the movable blade 34. The upper surface of the extension plate 36 is in abutment with the lower surface of the fixed blade 32. When the moving end moves towards the fixed blade 32, the movable blade 34 is tangent to the fixed blade 32. The elastic extruding piece 33 is installed on the base 31. The elastic extruding piece 33 is in abutment with the extension plate 36. The elastic extruding piece 33 can generate an extruding force towards the fixed blade 32 on the extension plate 36. When the elastic extruding piece 33 abuts against the extension plate 36, the extension plate 36 is kept in abutment with the fixed blade 32. In this way, by arranging the extension plate 36 on the movable blade 34 and making the side of the extension plate 36 coplanar with the side of the movable blade 34, the extension plate 36 is kept in abutment with the fixed blade 32. At the same time, by arranging the elastic extruding piece 33, the extension plate 36 is extruded by the elastic extruding piece 33, so that the extension plate 36 and the fixed blade 32 are kept in abutment at all times, thereby reducing the gap between the fixed blade 32 and the movable blade 34. Therefore, when the linear moving piece 35 drives the movable blade 34 to be tangent to the fixed blade 32, the effectiveness of the film cutting by the movable blade 34 and the fixed blade 32 can be improved, so as to improve the service life of the film cutting assembly.

[0085] The base 31 is in the form of a plate. The base 31 is provided with an opening 311. The cutting position is formed between the fixed blade 32 and the movable blade 34. The opening 311 is opposite to the cutting position, so that the film stripping product can enter the cutting position between the fixed blade 32 and the movable blade 34 from the opening 311, thereby facilitating the cutting of the film by the movable blade 34 being tangent to the fixed blade 32 through the linear moving piece 35.

[0086] The linear moving part 35 comprises a moving frame 351 (i.e. a moving end), a driving part 352, a guide part 353 and a transmission rod 354. The moving frame 351 is in sliding fit with the base 31, and the moving frame 351 can move linearly on the base 31 towards the direction of approaching or moving away from the fixed cutter 32. The movable cutter 34 is installed on the moving frame 351. The driving part 352 is a servo motor, a direct current motor, a stepping motor or a motor. The driving part 352 is installed on a corresponding frame body, and keeps a relatively fixed state with the base 31. The guide part 353 is connected to the driving end of the driving part 352, and can be driven to rotate by the driving part 352. The guide part 353 is an eccentric wheel, which rotates coaxially with the driving end of the driving part 352. One end of the transmission rod 354 is hinged to the side surface of the eccentric wheel. The hinged point between the transmission rod 354 and the eccentric wheel is spaced apart from the center of the eccentric wheel. The other end of the transmission rod 354 is hinged to the side surface of the moving frame 351. Thus, a crank slider structure is formed by the moving frame 351, the driving part 352, the guide part 353 and the transmission rod 354, so as to realize the linear movement of the moving end (the moving frame 351) of the linear moving part 35 under the driving action of the driving part 352, and realize the rapid cutting of the film material.

[0087] In order to realize the sliding fit between the moving frame 351 and the base 31, the base 31 is provided with a sliding rail 312, and the length direction of the sliding rail 312 is parallel to the moving direction of the moving end of the linear moving part 35. The moving frame 351 is provided with a sliding block 355, and the sliding block 355 is in sliding fit with the sliding rail 312.

[0088] In order to improve the abutting stability of the extension plate 36 to the fixed cutter 32, the number of the extension plate 36 is two, and the two extension plates 36 are distributed at the two ends of the length direction of the movable cutter 34. The two extension plates 36 correspond to the two ends of the length direction of the fixed cutter 32 respectively. The upper surfaces of the two extension plates 36 of the movable cutter 34 are respectively abutted to the lower surfaces of the two ends of the fixed cutter 32.

[0089] The number of elastic extruding pieces 33 is two, and the two elastic extruding pieces 33 are distributed at two ends of the length direction of the fixed knife 32 and are used for extruding the corresponding two extension plates 36. The elastic extruding piece 33 comprises a spring 331, a movable frame 332 and a pressing roller 38; one end of the spring 331 is installed on the base 31, the movable frame 332 is L-shaped, one end of the movable frame 332 is hinged to the base 31, the other end of the movable frame 332 is connected to the end of the spring 331 away from the base 31, the L-shaped opening 311 of the movable frame 332 faces the spring 331, the corner of the movable frame 332 is integrally connected with a pressing block 37, the pressing block 37 faces the extension plate 36 in the direction of the fixed knife 32, and the pressing roller 38 is rotatably installed on the side of the pressing block 37. Under the elastic force of the spring 331, the pressing block 37 of the movable frame 332 abuts against the extension plate 36 through the wheel surface of the pressing roller 38, so that the extension plate 36 abuts against the side surface of the fixed knife 32. Thus, by arranging the movable frame 332 in the L shape, under the elastic force of the spring 331, the movable frame 332 is flipped about the hinge point between the base 31 and the movable frame 332 in the direction away from the spring 331, and drives the pressing roller 38 to abut against the extension plate 36, so that the extension plate 36 abuts against the side surface of the fixed knife 32, thereby realizing the function of reducing the gap between the fixed knife 32 and the movable knife 34.

[0090] It can be understood that the pressing block 37 of the movable frame 332 extrudes the extension plate 36 in the direction of the fixed knife 32, and also abuts the upper surface of the extension plate 36 against the lower surface of the fixed knife 32, so that the upper surface of the extension plate 36 is coplanar with the upper surface of the movable knife 34, thereby realizing the function of reducing the gap between the fixed knife 32 and the movable knife 34.

[0091] Similarly, the movable frame 332 can be hinged to the base 31, one end of the spring 331 is installed on the base 31, and the other end abuts against one side of the movable frame 332, so that the movable frame 332 can abut the other side against the extension plate 36 under the elastic force of the spring 331. Since the upper surface of the extension plate 36 is coplanar with the upper surface of the movable knife 34, the function of reducing the gap between the fixed knife 32 and the movable knife 34 can be realized.

[0092] In summary, the film piece after cutting is transmitted by the film conveying device, and the film piece can smoothly leave the film conveying assembly, so that the problem of film piece winding on the roller can be solved. The film conveying device and the conveying device 10 are synchronously conveyed by the electric control device 50, the discharging end of the film conveying device is oppositely arranged with the discharging end of the conveying device 10, so that the film piece conveyed by the film conveying device is just covered on the toast surface conveyed by the discharging end of the conveying device 10, and the product with the film is continuously conveyed to complete the film pasting action, so that continuous work can be realized to improve the work efficiency.

[0093] Another embodiment, as shown in the accompanying drawings Figure 11 The first tensioning adjusting bolt 101 is installed on the main frame 100 below the conveying device 10, used for adjusting the tightness of the conveying belt 13, locking the conveying belt when rotating to the left, and loosening the conveying belt when rotating to the right. It also includes a press switch that is turned on when in a pressed state, generating an electrical signal that is transmitted to the PLC controller. The press switch includes a press head 103 and a press seat 102, which are matched and slidingly connected. The press seat 102 is slidingly connected to the main frame 10, and a locking bolt is also provided on the press seat 102 to fix the press seat to the main frame when it slides to a designated position. The press head 103 abuts the bolt head of the first tensioning adjusting bolt 101. After the adjustment of the conveying belt is completed, the laminating machine is normally started, and during the toast conveying process, some vibrations may occur due to the motor driving the machine, which may cause the first tensioning adjusting bolt 101 to loosen. This loosening process is difficult to monitor, so the press switch is introduced in this embodiment. After the adjustment is completed, the press seat is adjusted to the position after the adjustment of the first tensioning adjusting bolt, so that the press head abuts the bolt head of the first tensioning adjusting bolt 101. The press seat 102 is locked, and if the first tensioning adjusting bolt loosens during the laminating machine movement, the press head 103 will be pressed, and an electrical signal will be generated, which will be received by the PLC controller, giving an alarm to the operator to prevent accidents during production.

[0094] The above is only an embodiment of the present application, which is not limited to the field involved in this embodiment. Common knowledge of specific structures and characteristics in the scheme is not described in detail. Ordinary technical personnel in the field know all ordinary technical knowledge in the field before the application date or the priority date, can know all prior art in the field, and have the ability to apply conventional experimental means before that date. Ordinary technical personnel in the field can improve and implement the scheme based on their own ability under the guidance of this application. Some typical known structures or known methods should not be an obstacle for ordinary technical personnel in the field to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should be considered as the protection scope of the present application. These will not affect the effect and practicality of the patent. The protection scope of this application should be subject to the content of its claims, and the specific implementation in the specification can be used to explain the content of the claims.

Claims

1. A method for applying a film to toast, characterized in that, Includes the following steps: S1: Cut and fill the toast according to the settings; S2: Start the automatic film applicator and apply film to the toast through the automatic film applicator; S3: Pack the toast after applying the film; The automatic film applicator in step S2 includes a conveying device for conveying toast, a film feeding assembly located above the conveying device, and a film cutting assembly connected to the unloading end of the film feeding assembly. It also includes: A film feeding and conveying device that provides adsorption force to the film material passing through the film cutting assembly is provided at the unloading end of the film feeding assembly; an electrical control device that triggers and controls the synchronous conveying of the film feeding and conveying device; the unloading end of the film feeding and conveying device is arranged opposite to the unloading end of the conveying device; the film feeding and conveying device is a negative pressure film feeding and conveying device; The automatic film applicator includes a main frame, and the conveying device, film feeding assembly, film cutting assembly, film feeding conveying device and electrical control device are installed on the main frame; The film feeding assembly includes a driving roller, a driven roller, and a gap adjusting member that can adjust the radial position of the driven roller. The driving roller and the driven roller are arranged side by side, and a gap suitable for the film material to pass through is provided between them. The film cutting assembly includes a base, a fixed blade mounted on the base, an elastic extruder, and a linear moving member. The linear moving member is provided with a movable end that can move toward or away from the fixed blade. A movable blade is mounted on the movable end. The movable blade is provided with an extension plate that abuts against the fixed blade. When the movable end moves toward the fixed blade, the blade edge of the movable blade is tangent to the blade edge of the fixed blade. The elastic extrusion member abuts against the protruding plate, and the extrusion force of the elastic extrusion member is directed towards the fixed blade, so that the protruding plate and the fixed blade remain in abutting state; The elastic pressing component includes a spring and a movable frame. The movable frame is hinged to the base. One end of the spring is mounted on the base, and the other end abuts against one side of the movable frame. The movable frame can be pressed against the protruding plate by the elastic force of the spring. The movable frame is L-shaped. One end of the movable frame is hinged to the base, and the other end of the movable frame is connected to the end of the spring away from the base. A pressing block is provided at the corner of the movable frame. The pressing block abuts against and presses against the protruding plate in the direction of the fixed blade by the elastic force of the spring.

2. The method for applying a film to toast according to claim 1, characterized in that: The negative pressure film conveying device includes a connecting bracket, a negative pressure mechanism, and a conveyor belt mechanism mounted on the connecting bracket. The negative pressure mechanism includes a negative pressure frame and a negative pressure generator, both of which are mounted on the connecting bracket. The negative pressure output end of the negative pressure generator is connected to the negative pressure frame, enabling a negative pressure environment to be formed inside the negative pressure frame. The conveyor belt mechanism includes a transmission power component and a conveyor belt. The transmission power component is mounted on the connecting bracket, and the conveyor belt is poweredly connected to the power output end of the transmission power component. The surface of the conveyor belt has several ventilation holes, and the conveyor belt covers the frame opening surface of the negative pressure frame. The negative pressure generator can provide adsorption force to the film material on the conveyor belt through the ventilation holes, allowing the film material to be conveyed with the conveyor belt. The negative pressure film conveying device also includes a second tensioning adjustment bolt for adjusting the tension of the conveyor belt.

3. The method for applying a film to toast according to claim 2, characterized in that: The automatic film applicator includes a feeding assembly for mounting the film roll and a film passing assembly for guiding and flattening the film. The feeding assembly, film passing assembly, film feeding assembly, and film cutting assembly are arranged sequentially along the film conveying direction. It also includes a support side plate and a height adjustment device connected to the support side plate for adjusting the height of the film feeding assembly, film passing assembly, and film cutting assembly.

4. The method for applying a film to toast according to claim 3, characterized in that: The feeding assembly includes a roller mounted on the support side plate and a locking member for fixing the film roll; the film passing assembly includes a plurality of rollers mounted on the support side plate and a limiting sleeve sleeved on the rollers, the film material passing through the outer surface of the plurality of rollers and the limiting sleeve restricting its axial position.

5. The method for applying a film to toast according to claim 1, characterized in that: The linear moving component includes a moving frame, a driving component, a guide component, and a transmission rod. The moving frame is the moving end and is slidably engaged with the base. The movable blade is mounted on the moving frame. The driving component is fixed relative to the base, and its driving end is connected to the guide component. One end of the transmission rod is hinged to the guide component at a position away from the driving component, and the other end is hinged to the moving frame. The driving component, guide component, transmission rod, and moving frame form a crank-slider structure, which drives the moving frame to move linearly.

6. The method for applying a film to toast according to claim 5, characterized in that: The guide component adopts an eccentric wheel, which rotates coaxially with the driving end of the driving component, and one end of the transmission rod is hinged to the side of the eccentric wheel; The base is provided with a slide rail, the length direction of which is parallel to the moving direction of the movable frame. The movable frame is provided with a slider, which slides in conjunction with the slide rail.

7. A method for applying a film to toast according to claim 6, characterized in that: The conveying device includes a power component, a drive shaft, a driven shaft, and a conveyor belt sleeved on the outer periphery of the drive shaft and the driven shaft. The power component is poweredly connected to the drive shaft. The conveying device also includes a first tensioning bolt for adjusting the conveyor belt. The electrical control device includes a frequency converter, a PLC controller, and an operation panel. The operation panel is electrically connected to the frequency converter, the PLC controller, the conveying device, the film feeding assembly, the film cutting assembly, and the film feeding and conveying device.

8. A method for applying a film to toast according to claim 7, characterized in that: Before starting the automatic film applicator, it is necessary to test the machine. The testing method is as follows: S11: Troubleshooting malfunctions in the transmission device: S111: When the conveyor belt is not running, check whether the input parameters under the corresponding conveyor speed item on the operation panel are correct, check whether the corresponding conveyor start button is turned on, check whether the conveyor device is blocked by foreign objects, and check whether the conveyor belt tension is too high. S112: When the conveyor belt slips during operation: Stop the machine and check if the conveyor belt is tensioned. If the tension is insufficient, adjust the tension of the conveyor device through the first tension adjustment bolt. During the tension adjustment process, pay attention to ensuring that the tension on both sides of the belt edge is consistent. S113: When the conveyor belt deviates during operation, stop the machine and adjust it by adjusting the first tensioning bolt until the conveyor belt is loosened. Readjust the conveyor belt to ensure that the guide strips inside the conveyor belt are in the running grooves of each wheel set and the conveyor frame. Then gradually tension the conveyor belt. During the tensioning process, pay attention to keeping the tension on both sides of the belt consistent. S12: Troubleshooting abnormalities in the negative pressure film conveyor belt: S121: Conveyor belt not running: Check if the input parameters on the right side of the corresponding film pulling speed item on the operation panel are correct, check if the conveyor device is blocked by foreign objects, and check if the conveyor belt tension is too high. S122: The conveyor belt is slipping: Stop the machine and check if the conveyor belt is tensioned. If the tension is insufficient, find the second tensioning bolt and adjust it to tension. During the tension adjustment process, pay attention to ensuring that the tension on both sides of the belt edge is consistent. S123: The conveyor belt is running off track: Stop the machine and adjust it. Locate the second tensioning bolt and adjust it until the conveyor belt is loosened. Readjust the conveyor belt and ensure that the guide bars inside the conveyor belt are in the running grooves of each wheel set and the conveyor frame. Then gradually tension the conveyor belt. During the tensioning process, pay attention to keeping the tension on both sides of the belt consistent. S124: Conveyor belt does not adhere to film: Stop the machine and check if the air pump inside the machine is turned on, and check if the hose connector is loose or has fallen off; S13: Abnormal film cutting is eliminated; the fixed blade and the movable blade cooperate to form a cutting blade; S131: When the cutter is not running: check whether the input parameters under the corresponding cutter speed and cutter stroke on the operation screen are correct, check whether the servo motor is in the original position, and reset the cutter. S132: Inability to cut the film: Check if the cutting edge is worn or has nicks; Check if the cutter crosses the blades properly during operation; Inspection Check whether the pressure bearing is pressing the cutter firmly and whether the cutter blade is aligned during operation.

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