Film feeding device of hot film machine

Abstract

The present invention discloses a film feeding device for a film ironing machine. The device is located between the film tape reel and the punching seat of the film ironing machine and includes an active film feeding mechanism, a swinging structure, and a sensing system. The swinging structure has a first contact end and a second contact end. The film tape output by the active film feeding mechanism drives the first contact end and causes the swinging structure to rotate. The sensing system includes a first sensor. When the tension of the film tape output by the active film feeding mechanism reaches a maximum threshold, the first sensor senses the second contact end and sends a start signal to the active film feeding mechanism to feed the film tape. The present invention has the beneficial effect of loosening the film tape between the film tape reel and the punching seat, thereby preventing the guide mechanism of the film ironing machine from slipping.

Description

Technical Field

[0001] The invention relates to a film feeding device, in particular to a film feeding device of a film ironing machine. Background Art

[0002] At present, various embroidery products are decorated with bright films or sequins to achieve beautiful effects. There are many types and colors of decorative bright films. Usually, a hot stamping machine (also known as a pattern making machine or patch machine) is used to cut the film strip into film sheets by punching and stick them on the surface of the embroidery.

[0003] Prior art publication number CN111910353A discloses a modular combination of a hot stamping machine head and a punching needle buffer mechanism, and a hot stamping machine. Referring to the drawings in the specification of this application, the principle of conveying and punching a material strip 1001 is as follows: the film feed roller assembly pulls the material strip 1001. After the material strip 1001 is released from the material strip reel 1000, the material strip 1001 passes from top to bottom in sequence through the material strip guide wheel 13 and the upper material strip guide roller 24. It is then guided by the lower material strip guide roller 211 into the film feed slot 322 and then enters the film feed assembly. When the hot stamping material strip 1001 passes through the film feed slot 322, the punching needle drive assembly drives the punching needle 36 to reciprocate up and down, punching the sheet through the punching needle 36.

[0004] This existing technology has defects: the film tape (material tape) pulled by the guiding mechanism (feeding roller assembly) of the ironing machine is spit out by the rotation of the film tape reel (material tape reel), and the film tape reel has damping during the rotation process. If the damping is too high, the tension of the film tape from the film tape reel to the punching seat will gradually increase until it is fully tightened, causing the guiding mechanism to slip when pulling the film tape, making the distance the film tape is pulled too short, causing the part of the film tape where the through hole is punched to be within the punching range, and then the punched film will have a gap, affecting the quality of the ironing. The material tape guide wheel and the feeding tape guide roller in the existing technology only play the role of guiding the film tape, and do not improve the tension of the film tape. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a film feeding device for a sheet ironing machine, which can loosen the film tape between the film tape reel and the punching seat, thereby preventing the guide mechanism of the sheet ironing machine from slipping.

[0006] The present invention is achieved through the following technical solutions.

[0007] A film feeding device of a film ironing machine is located between the film tape reel and the punching seat of the film ironing machine, and includes an active film feeding mechanism, a swinging structure, and a sensing system. The swinging structure has a first contact end and a second contact end that rotate therewith. The film tape output by the active film feeding mechanism can drive the first contact end and cause the swinging structure to rotate. The sensing system includes a first sensor. When the tension of the film tape output by the active film feeding mechanism reaches a maximum threshold, the second contact end rotates to within the sensing range of the first sensor, and the first sensor sends a start signal to the active film feeding mechanism to cause it to feed the film tape.

[0008] The film feeding device of the ironing machine of the present invention first solves the technical problem that the damping of the film belt conveyed by the ironing machine is large, resulting in slippage. The swinging structure swings synchronously with the tensioning state of the film belt. By setting the maximum threshold value of the film belt tension and the first sensor sensing the second contact end at this time, and sending a signal to the active film feeding mechanism and actively feeding the film belt, it can be ensured that the tension of the film belt output by the active film feeding mechanism is always in a relaxed state, thereby avoiding the situation where the guiding mechanism of the ironing machine pulls the film belt and slips, so that the film belt located in the punching seat is pulled too short a distance, resulting in a gap in the punched film.

[0009] As a further improvement of the present invention, the active film feeding mechanism starts and continues for a predetermined time before stopping.

[0010] As a further improvement of the present invention, the sensing system also includes a second sensor. After the active film feeding mechanism is started, when the tension of the film belt output by the active film feeding mechanism reaches a minimum threshold, the second sensor senses the second contact end and sends a stop signal to the active film feeding mechanism.

[0011] As a further improvement of the present invention, the active film feeding mechanism includes a matching active roller and a driven roller, and a driving motor for driving the active roller. The active roller and the driven roller are respectively attached to the two sides of the film strip to pull and transport the film strip.

[0012] As a further improvement of the present invention, the frame of the sheet ironing machine is provided with a plurality of the driven rollers and a plurality of the swing structures installed side by side along its translation direction to correspond to a plurality of film strips.

[0013] As a further improvement of the present invention, the sensing system is installed on the casing or main beam of the sheet ironing machine to sense the second contact end of the swing structure corresponding to the film strip currently being punched.

[0014] As a further improvement of the present invention, a plurality of the sensing systems are installed side by side on the frame of the ironing machine along its translation direction to correspond to the second contact ends of the plurality of the swing structures.

[0015] As a further improvement of the present invention, each of the driven rollers is equipped with a supporting mechanism, and the supporting structure can move relative to the frame and can be reset. When the supporting structure is in the reset position, the corresponding driven roller is disengaged from the active roller, and the main beam or casing of the ironing machine is provided with a locking structure, which acts on the supporting structure corresponding to the film strip currently being punched and drives its corresponding driven roller to cooperate with the active roller.

[0016] As a further improvement of the present invention, the support structure includes a support rod installed on the frame and capable of sliding along its axial direction, a mounting frame arranged at one end of the support rod, a first elastic reset member supporting the frame and the support rod, the driven roller is installed on the mounting frame, and the locking structure can push the support rod to slide in the direction toward the active roller.

[0017] As a further improvement of the present invention, the locking structure includes a fixed seat fixed on the casing or main beam, a locking rod installed on the fixed seat and slidable along its axial direction, and a second elastic reset member supporting the locking rod and the fixed seat. One end of the locking rod and one end of the supporting rod have a first matching structure and a second matching structure respectively. When the frame translates and interferes with each other, the two slide relative to each other and generate opposite supporting forces. The elastic force of the second elastic reset member is always greater than that of the first elastic reset member.

[0018] As a further improvement of the present invention, the swing structure includes a first swing arm and a second swing arm extending outward from its rotation center, and the first contact end and the second contact end are respectively located on the first swing arm and the second swing arm.

[0019] As a further improvement of the present invention, the first contact end of the first swing arm is equipped with a guide roller for guiding the film tape.

[0020] Beneficial effects of the present invention:

[0021] (1) The present invention sets a maximum threshold value for the film tape tension. By sensing the second contact end of the swinging structure through the first sensor and actively feeding the film tape, it can be ensured that the film tape tension output by the active film feeding mechanism is always in a relaxed state, thereby preventing the film tape from slipping when being pulled by the guide mechanism of the ironing machine.

[0022] (2) The present invention can keep the film tape loose between the film tape reel and the punching seat, thereby reducing the requirements for the traction force of the guide mechanism and also preventing the film tape from being broken or deformed;

[0023] (3) The present invention can avoid the problem of attenuation and delay of traction force along with the length of the film strip, thereby improving the efficiency of guiding and conveying the film strip;

[0024] (4) The present invention uses a support mechanism and a locking structure so that only the film strip currently being stamped can be pulled, and other film strips cannot be pulled, which is suitable for multi-color ironing and color changing;

[0025] (5) The present invention uses the first elastic reset member and the second elastic reset member to enable the active roller and the driven roller to pull the film strip without pinching the film strip, thereby ensuring the quality of the ironing sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the objects and advantages of the present invention, wherein:

[0027] Figure 1 This is a side view schematic diagram of the ironing machine of Example 1;

[0028] Figure 2 A side view schematic diagram of the film feeding device of the hot sheet machine in Example 1;

[0029] Figure 3 A side view schematic diagram of the film feeding device of the hot sheet machine in Example 2;

[0030] Figure 4 A side view schematic diagram of the ironing machine for implementation case 3;

[0031] Figure 5 This is a schematic diagram of the structure of the ironing machine for implementation case 3;

[0032] Figure 6 This is a side view of the film feeding device of the ironing machine in Example 3. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and implementation examples.

[0034] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0035] Implementation Case 1:

[0036] Reference Figure 1 、 Figure 2A film feeding device of a film ironing machine is arranged between the film tape reel S1 and the stamping seat S2 of the film ironing machine. It includes an active film feeding mechanism 1, a swinging structure 2, and an induction system. The active film feeding mechanism 1 includes an active roller 11, a driven roller 12, and a driving motor for driving the active roller 11, located below the film tape reel S1. The active roller 11 and the driven roller 12 are respectively located on both sides of the film tape P, and the two are attached to the two surfaces of the film tape P. Starting the driving motor can drive the active roller 11 to rotate, drive the driven roller 12 to pull the film tape P, and pull the film tape P on the film tape reel S1 and transport it to the stamping seat S2.

[0037] The swing structure 2 is located below the active film feeding mechanism 1 and can rotate around a fixed axis. The swing structure 2 includes a first swing arm 21 and a second swing arm 22 extending outward from the rotation center. The first swing arm 21 and the second swing arm 22 can be fixedly connected by fasteners, or they can be an integrated structure. The far end of the first swing arm 21 away from the rotation center is defined as the first contact end 2-A of the swing structure 2, and the far end of the second swing arm 22 away from the rotation center is defined as the second contact end 2-B of the swing structure 2. The first contact end 2-A of the swing structure 2 is installed with a guide roller 23 for guiding the film tape P. Therefore, the film tape P pulled out by the active film feeding mechanism 1 can drive the guide roller 23, so that the first swing arm 21 and the second swing arm 22 rotate synchronously around their rotation center.

[0038] The sensing system includes a first sensor 31, which is used to sense the second contact end 2-B of the swing structure 2. When the tension of the film tape P pulled and output by the active film feeding mechanism 1 reaches the maximum threshold, the second contact end 2-B rotates with the second swing arm 22 to the position sensed by the first sensor 31. At this time, the first sensor 31 sends a signal to the drive motor of the active film feeding mechanism 1, and the drive motor starts to drive the active roller 11 to drive the driven roller 12 to pull the output film tape P, and stops after a specified time.

[0039] The maximum threshold value of the tension of the film strip P depends on the actual application, such as the traction strength of the guide mechanism S3 of the ironing machine, the toughness of the film strip P, etc. Usually, the maximum threshold value is set to the time when the corresponding film strip P is taut.

[0040] In this embodiment, the first swing arm 21 and the second swing arm 22 are perpendicular to each other, and the angle between the two can also be increased or decreased. When the tension of the film belt P reaches the maximum threshold (that is, the film belt P is taut), the first swing arm 21 and the second swing arm 22 are in an upright state and a horizontal state respectively, and the active film feeding mechanism 1 pulls and outputs the film belt P. The tension of the film belt P begins to decrease and gradually relaxes. At this time, the swing structure 2 rotates clockwise. The duration of the activation of the active film feeding mechanism 1 is also set according to the actual application situation. Under normal circumstances, when the active film feeding mechanism 1 stops pulling and conveying the film belt P, the first swing arm 21 and the second swing arm 22 are both in a naturally hanging state.

[0041] First, the first contact end 2-A of the swinging structure 2 is driven by the film belt P, and the swinging structure 2 swings synchronously according to the tensioning state of the film belt P. By setting the maximum threshold value of the tension of the film belt P, the corresponding state of the film belt P is tightened, that is, the node where the guide mechanism S3 of the ironing machine slips, and the first sensor 31 is set to sense the second contact end 2-B of the swinging structure 2 at this time, and send a signal to the active film feeding mechanism 1 to actively pull and transport the film belt P. Therefore, it can be ensured that the tension of the film belt P output by the active film feeding mechanism 1 is always in a relaxed state, thereby avoiding the situation where the guide mechanism S3 of the ironing machine pulls the film belt P and slips, so that the film belt P located in the punching seat S2 is pulled too short a distance or even cannot be pulled, resulting in gaps in the punched film or punching emptying.

[0042] Secondly, in the existing technology of the film ironing machine, the film strip P is exerted with a traction force by the guide mechanism S3, and the film strip P is discharged by the film strip reel S1. The traction force of the guide mechanism S3 on the film strip P needs to be transmitted to the film strip reel S1 through the film strip P to drive it to output the film strip P. The traction force will decay with the length of the film strip P and has a certain delay. Usually, the film strip reel S1 of the film ironing machine is set at the top, the punching seat S2 is located at the front end of the bottom, and the guide mechanism S3 is set at the rear end of the bottom. The distance between the film strip reel S1 and the guide mechanism S3 is too far, and at the same time, the film strip P passes through the punching seat S2 so that its length is also much greater than the distance between the film strip reel S1 and the guide mechanism The straight-line distance between S3, when the traction force attenuation amplitude is large and the delay is large, the tension of the film tape P will be amplified until the film tape P between the film tape disk S1 and the punching seat S2 is completely tightened. Therefore, the guiding mechanism S3 of the prior art needs to output a larger traction force, and in the technical solution of the present invention, the active film feeding mechanism 1 plays the role of intermediate traction and transportation. Under the conveying mechanism of the active film feeding mechanism 1, the film tape P pulled and transported by it is always in a relaxed state, that is, the film tape P pulled by the guiding mechanism S3 is in a relaxed state. Therefore, the requirements for the traction mechanism are relatively low, and the configuration requirements can be appropriately reduced to save costs.

[0043] Furthermore, since the distance between the active film feeding mechanism 1 and the film tape reel S1 is relatively short, the attenuation amplitude of the traction effect transmitted from the active film feeding mechanism 1 to the film tape reel S1 is relatively small, and the hysteresis is also relatively small, which can improve the traction and transportation efficiency of the film tape P. It is worth noting that the biggest problem of the existing technology is that the guiding mechanism S3 needs to avoid slipping when traction of the film tape P. In the present invention, compared with the intermittent traction of the guiding mechanism S3 in the existing technology, the active film feeding mechanism 1 continuously pulls the film tape P after it is started, and even if slipping occurs, it is in a state of continuous traction and transportation of the film tape P. It is sufficient to ensure that the film tape P between the active film feeding mechanism 1 and the punching seat S2 is relaxed. Therefore, the configuration requirements of the active film feeding mechanism 1 can be appropriately reduced, which not only saves costs but also avoids the problem of damage to the traction of the film tape P.

[0044] Finally, there are usually two types of film tapes P assembled in the ironing machine, one is made of rigid material and the other is made of elastic material. The existing technology has problems with both types of film tapes P. Since the film tape P is in a tensioned state, the film tape P made of rigid material is easily broken under the traction of the guide mechanism S3, and the film tape P made of elastic material is easily stretched and deformed under the traction of the guide mechanism S3, thereby making the ironing sheet under stamping elliptical, affecting the quality of the ironing sheet. Under the effect of the present invention, the film tape P pulled by the guide mechanism S3 is in a relaxed state and will not break or stretch and deform. The film tape P between the film tape reel S1 and the active film feeding mechanism 1 is not easily broken or stretched and deformed due to its short length, and the active film feeding mechanism allows traction and slippage, so the protection of the film tape P can be improved.

[0045] Implementation Case 2:

[0046] Reference Figure 3 Combined with Figure 1 On the basis of implementation case 1, the sensing system also includes a second sensor 32. After the active film feeding mechanism 1 is started, when the tension of the film tape P pulled and output by the active film feeding mechanism 1 reaches the minimum threshold, the second sensor 32 senses the second contact end 2-B and sends a stop signal to the active film feeding mechanism 1. The minimum threshold of the tension of the film tape P is also set according to the actual application situation. Usually, when the first swing arm 21 and the second swing arm 22 naturally hang down, the tension of the corresponding film tape P is set to the minimum threshold.

[0047] Compared with implementation case 1, if the active film feeding mechanism 1 allows slippage, implementation case 2 can control the tension of the film strip P more accurately.

[0048] Implementation Case 3:

[0049] Reference Figure 4 、 Figure 5 、 Figure 6 Combined with Figure 1 , which is different from Implementation Case 1 and Implementation Case 2, there are multiple driven rollers 12 and swing structures 2. The frame S4 ​​of the ironing machine is equipped with multiple driven rollers 12 and multiple swing structures 2 along its translation direction to correspond to multiple film strips P. The casing S5 or main beam S6 of the ironing machine is equipped with a sensing system for sensing the second contact end of the swing structure 2 corresponding to the film strip P currently being punched. Multiple sensing systems can also be installed side by side on the frame S4 ​​of the ironing machine along its translation direction to correspond to multiple swing structures 2.

[0050] Each driven roller 12 is equipped with a support mechanism 4, which includes a support rod 41, a mounting frame 42, and a first elastic reset member 43. The support rod 41 passes through the frame S4 ​​of the ironing machine and can slide in the axial direction. One end of the support rod 41 is fixedly connected to the mounting frame 42. The driven roller 12 is mounted on the mounting frame 42. The first elastic reset member 43 can optionally use a compression spring, supporting the frame S4 ​​and the support rod 41. When the first elastic reset member 43 can drive the support rod 41 to slide and reset, the driven roller 12 is disengaged from the active roller 11 when in the reset position. The main beam S6 or the casing S5 of the ironing machine is provided with a locking structure 5. The locking structure 5 acts on the support structure corresponding to the film strip P currently performing punching, and drives the driven roller 12 to which the support structure belongs to cooperate with the active roller 11 to pull and convey the film strip P.

[0051] This embodiment corresponds to a sheet ironing machine equipped with multiple film strips P. Only the support mechanism 4 corresponding to the film strip P currently performing sheet punching cooperates with the locking structure 5, so that the driven roller 12 of the support mechanism 4 cooperates with the active roller 11 to pull the film strip P, while the driven rollers 12 corresponding to other film strips P are separated from the active roller 11, so that other film strips P will not be pulled and transported. When the sheet ironing machine changes color, as the frame S4 ​​of the sheet ironing machine translates, the support mechanism 4 corresponding to the film strip P currently performing sheet punching is separated from the locking structure 5, and the support mechanism 4 corresponding to the next film strip P performing sheet punching is acted upon by the locking structure 5, so that the film strip P is pulled and transported.

[0052] In this embodiment, the locking structure 5 includes a fixed seat 51, a locking rod 52, and a second elastic return member 53. The fixed seat 51 is fixed to the casing S5 or the main beam S6. The locking rod 52 is slidably mounted on the fixed seat 51 and is parallel to the support rod 41. The locking rod 52 can slide along its axial direction. The second elastic return member 53 can optionally use a compression spring to support the locking rod 52 and the fixed seat 51. One end of the locking rod 52 and one end of the support rod 41 respectively have a first matching structure 5-A and a second matching structure 5-B. The two slide relative to each other when the frame S4 ​​translates and interferes with each other, and generate opposite supporting forces. In this embodiment, the first matching structure 5-A is set as a bearing, and the second matching structure 5-B is set as a cone structure. The bearing can slide along the side of the cone to the top surface of the cone, thereby reducing the friction loss when the two slide relative to each other. On the one hand, it can enable the locking structure 5 to quickly act on the support mechanism 4 so that the driven roller 12 can quickly match the active roller 11 On the other hand, it can also reduce the loss between the two and extend the service life. The elastic force of the second elastic return member 53 is always greater than the first elastic return member 43. The dimensions of the locking rod 52 and the support rod 41 are subject to certain errors during the production process. This error will cause the clamping force between the driven roller 12 and the active roller 11 to be too large after the interaction between the two, resulting in damage or even breakage of the film strip P, or will cause the gap between the driven roller 12 and the active roller 11 to be too large, resulting in the inability to pull the film strip P. In this embodiment, since the elastic force of the second elastic return member 53 is always greater than the first elastic return member 43, the locking rod 52 can push the support rod 41 to slide toward the active roller 11. After the driven roller 12 cooperates with the active roller 11, the second elastic return member 53 is compressed, so that the driven roller 12 will not excessively clamp the film strip P with the active roller 11, so that the active roller 11 and the driven roller 12 can meet the traction of the film strip P without causing damage to the film strip P.

[0053] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A film feeding device for a sheet ironing machine, characterized in that: The cam is located between the film tape reel and the stamping seat of the film ironing machine, and includes an active film feeding mechanism, a swinging structure, and a sensing system, wherein the swinging structure has a first contact end and a second contact end that rotate therewith, and the film tape output by the active film feeding mechanism can drive the first contact end and make the swinging structure rotate, the swinging structure includes a first swing arm and a second swing arm extending outward from its rotation center, the first contact end and the second contact end are respectively located at the first swing arm and the second swing arm, and the sensing system includes a first sensor, when the tension of the film tape output by the active film feeding mechanism reaches a maximum threshold, the second contact end rotates to the sensing range of the first sensor, and the first sensor sends a start signal to the active film feeding mechanism to feed the film tape; the active film feeding mechanism includes a matching active roller and a driven roller, and a driving motor for driving the active roller, the active roller and the driven roller are respectively attached to the two sides of the film tape to pull and transport the film tape; the frame of the film ironing machine is equipped with a plurality of the driven rollers and a plurality of the swinging structures side by side along its translation direction to correspond 14. The repairing kit for automotive dents, according to claim 13, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut.

2. The film feeding device of the sheet ironing machine according to claim 1, characterized in that: The active film feeding mechanism starts and continues for a predetermined time before stopping.

3. The film feeding device of the sheet ironing machine according to claim 1, characterized in that: The sensing system further includes a second sensor. After the active film feeding mechanism is started, when the tension of the film tape output by the active film feeding mechanism reaches a minimum threshold, the second sensor senses the second contact end and sends a stop signal to the active film feeding mechanism.

4. The film feeding device of the sheet ironing machine according to claim 1, characterized in that: The sensing system is installed on the casing or main beam of the sheet punching machine to sense the second contact end of the swing structure corresponding to the film strip currently being punched.

5. The film feeding device of the sheet ironing machine according to claim 1, characterized in that: The frame of the ironing machine is provided with a plurality of the sensing systems arranged side by side along its translation direction to correspond to the second contact ends of the plurality of the swing structures.

6. The film feeding device of the sheet ironing machine according to claim 1, characterized in that: A guide roller for guiding the film tape is installed at the first contact end of the first swing arm.

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