Unwinding mechanism with constant film roll tension

Abstract

The utility model relates to a film roll unwinding mechanism, in particular to an unwinding mechanism with constant film roll tension. An unwinding mechanism with constant film roll tension comprises a machine frame, a material roll roller is installed at the upper end of the machine frame through a supporting frame, two sets of supporting rollers are installed on the upper portion of the machine frame through bearings, an upper pressing roller and a lower pressing roller are arranged below the supporting rollers respectively, and the upper pressing roller and the lower pressing roller are fixed to the machine frame through installation bearings. And a magnetic powder brake is mounted at the tail end of the material winding roller. According to the unwinding mechanism with the constant film roll tension, the magnetic powder brake is arranged on the material winding roller installed on the machine frame, the magnetic powder brake can adjust the unwinding speed of the material winding roller and is used for adjusting the tension coefficient of a film belt on the upper pressing roller and the lower pressing roller, the constant tension requirement of film laminating operation is met, and defective products are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a film roll unwinding mechanism, especially a film roll tension constant unwinding mechanism. BACKGROUND

[0002] In the process of covering film operation, the film strip in the film roll needs to be unwound, and the tension on the film strip will gradually change due to the gradual reduction of the diameter of the film roll during continuous film unwinding operation. At the end of the film covering operation, the film strip on the covered plate will be uneven due to the change of tension, which is prone to bubbles and wrinkles, etc. This leads to high rejection rate of the film covering product and increases production cost, which is not conducive to enterprise production.

[0003] In view of the above defects, the present design person actively researches and innovates to create a film roll tension constant unwinding mechanism, which has more industrial utilization value. INVENTION CONTENTS

[0004] To solve the above technical problems, the purpose of the utility model is to provide a film roll tension constant unwinding mechanism.

[0005] The utility model relates to a film roll tension constant unwinding mechanism, which comprises a rack, a material roll roller installed on the upper end of the rack through a support frame, two groups of support rollers installed on the upper part of the rack through bearings, an upper compression roller and a lower compression roller below the support rollers, the upper compression roller and the lower compression roller being fixed on the rack through mounting bearings, and a magnetic powder brake installed at the tail end of the material roll roller.

[0006] This film roll tension constant unwinding mechanism has a magnetic powder brake on the material roll roller installed on the rack. The magnetic powder brake can adjust the unwinding speed of the material roll roller, adjust the tension coefficient of the film strip on the upper compression roller and the lower compression roller, meet the constant tension requirement of the film covering operation, and avoid the generation of defective products.

[0007] Further, the support rollers are arranged in an up-down staggered manner, and a tension sensor is installed between the support rollers.

[0008] The tension sensor installed between the support rollers is used to measure the tension on the unwound film strip in real time and understand the tension value.

[0009] Further, a sensor support is fixed on the rack, the front end of the sensor support is in contact with the contact frame, and the tension sensor is in contact with the contact frame.

[0010] The sensor is in contact with the contact frame, and the contact frame is used to contact the film strip to transmit the pressure information on the film strip to the tension sensor for pressure detection.

[0011] Further, the rotating shaft seat is arranged at both ends of the sensor support, and the rotating shaft is arranged in the rotating shaft seat.

[0012] The relative angle of the contact frame is adjustable, so that the contact frame is convenient to contact with the film belt.

[0013] Further, the adapter plate is fixed at the end of the contact frame, and a plurality of through holes are arranged on the adapter plate, and the tension sensor is arranged in one of the through holes.

[0014] The installation position of the tension sensor is adjustable, so that the tension sensor is convenient to install.

[0015] By the above scheme, the film roll tension constant unwinding mechanism has at least the following advantages: the film belt tension is detected by the tension sensor, the detected information is collected and processed by the connected industrial computer, and then the industrial computer sends control information to the magnetic powder brake to adjust the unwinding speed of the roll, so that the film belt tension constant operation is realized, the generation of defective products is effectively avoided, and the product qualification rate is improved.

[0016] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and the content of the specification can be implemented, the following will be described in detail with the preferred embodiment of the present application and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiment, it should be understood that the following drawings only show one embodiment of the present application, therefore should not be regarded as the limitation of the scope, for the ordinary skilled in the art, without creative labor, other related drawings can also be obtained according to these drawings.

[0018] Figure 1 is a structural schematic diagram of the present application;

[0019] Figure 2 is a structural schematic diagram of the present application Figure 1 sectional view;

[0020] Figure 3 is a structural schematic diagram of the present application Figure 1 enlarged schematic diagram of the part;

[0021] In the figure, 1 is a rack, 2 is a support frame, 3 is a roll, 4 is a supporting roller, 5 is an upper pressing roller, 6 is a lower pressing roller, 7 is a magnetic powder brake, 8 is a tension sensor, 9 is a sensor support, 10 is a contact frame, 11 is a rotating shaft seat, 12 is a rotating shaft, 13 is a connecting block, 14 is an adapter plate. DETAILED DESCRIPTION

[0022] The specific embodiments of the utility model will be described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

[0023] Referring to Figure 1 , the rack 1 of the film roll tension constant unwinding mechanism is spliced by multiple metal profiles, the bottom thereof is in contact with the foundation to complete the support, the upper end of the rack 1 is movably provided with a material roll 3 through a support frame 2, one end of the material roll 3 is provided with a magnetic powder brake 7, the unwinding speed is adjusted through the magnetic powder brake 7 when the material roll 3 is unwinding, so as to ensure that the film belt unwound by the material roll 3 has constant tension, the power of the film belt is provided by an upper pressing roller 5 and a lower pressing roller 6, the upper pressing roller 5 and the lower pressing roller 6 are driven by a motor to rotate at a constant speed, so as to drive the film belt to move at a constant speed.

[0024] Referring to Figure 2 , the support rollers 4 are arranged in a staggered manner, and the film belt is convenient to transfer after passing through the support rollers 4.

[0025] Referring to Figure 2 and Figure 3 , a sensor support 9 is installed on the inner side of the support frame 1, the tension sensor 8 is in contact with a contact frame 10, the contact frame 10 is in contact with the film belt after passing through the support rollers 4, and the tension of the film belt can be monitored in real time.

[0026] Referring to Figure 3 , the contact frame 10 is connected with the rotating shaft 12 through the connecting block 13, the rotating shaft 12 is provided with a threaded section at both ends, the locking bolts are sleeved on the rotating shaft 12, the rotating shaft 12 is inserted into the rotating shaft seat 11, then the locking bolts on both sides are rotated to make the locking bolts contact with the end surface of the rotating shaft seat 11, the locking bolts at both ends are locked at the same time, the clamping force is applied to the rotating shaft 12, the fixing of the rotating shaft 12 is completed, the installation position of the contact frame 10 is convenient to adjust, and it is ensured that the contact frame 10 can contact with the film belt.

[0027] Referring to Figure 3 , the end of the contact frame 10 is provided with an adapter plate 14, the tension sensor 8 can be installed in any through hole on the adapter plate 14, and the installation of the tension sensor 8 is facilitated.

[0028] The working principle of the utility model is as follows:

[0029] When the film roll tension constant unwinding mechanism is used, the film belt is first drawn out from the material roll 3, referring to Figure 2The tail end of the film strip is put between the upper pressing roller 5 and the lower pressing roller 6, the upper pressing roller 5 and the lower pressing roller 6 are driven to rotate by a motor, the film strip is tensioned, the film strip is always attached to the upper pressing roller 5 and the supporting roller 4, the initial film strip tension data can be acquired by the tension sensor, the data is transmitted to the industrial computer, as the film strip is continuously pulled out, the film roll diameter on the material roll roller 3 is gradually reduced, the film strip tension after the material roll roller 3 is unwound will change, finally, the film coating operation of the upper pressing roller 5 and the lower pressing roller 6 will be affected, at this time, the magnetic powder brake 7 is started, the brake pressure is adjusted, the unwinding speed of the material roll roller 3 is adjusted, the film strip tension after unwinding is adjusted, the film strip tension after unwinding is ensured to be constant, and the film coating operation requirement is met.

[0030] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0031] Secondly: the utility model discloses the embodiment of the drawings, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, under the condition of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other.

[0032] Finally: the preferred embodiment of the utility model described above, and not for limiting the utility model, it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present invention, can make a number of improvements and modifications, these improvements and modifications should also be considered as the protection scope of the utility model.

Claims

1. A film roll unwinding mechanism with constant tension, comprising a frame (1), characterized in that: The upper end of the frame (1) is provided with a roll of material roll (3) through a support frame (2), the upper part of the frame (1) is provided with two sets of support rollers (4) through bearings, below the support rollers (4) are upper and lower pressure rollers (5) and (6) respectively, the upper and lower pressure rollers (5) and (6) are fixed on the frame (1) through mounting bearings, the tail end of the material roll (3) is provided with a magnetic powder brake (7).

2. The film unwinding mechanism with constant tension according to claim 1, characterized in that: The support rollers (4) are arranged in an up-and-down staggered manner, and a tension sensor (8) is installed between the support rollers (4).

3. The film unwinding mechanism with constant tension according to claim 2, characterized in that: A sensor support (9) is fixed on the frame (1), the front end of the sensor support (9) is in contact with the contact frame (10) through the contact frame (10).

4. The film unwinding mechanism with constant tension according to claim 3, characterized in that: Rotary shaft seats (11) are arranged at both ends of the sensor support (9), rotary shafts (12) are installed in the rotary shaft seats (11), and the rotary shafts (12) are fixedly connected with the contact frame (10) through connecting blocks (13).

5. The film unwinding mechanism with constant tension according to claim 4, characterized in that: An adapter plate (14) is fixed at the end of the contact frame (10), the adapter plate (14) has a plurality of through holes, and the tension sensor (8) is installed in one of the through holes.

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