Rotary screen linear motion device of combined printing machine

Abstract

The utility model discloses a rotary screen linear motion device of a combined printing machine. The rotary screen linear motion device comprises a sliding table, a first driving mechanism and a second driving mechanism. The first driving mechanism comprises a pressing roller, a carrier roller and a first transmission shaft, the pressing roller is installed in the annular area of the guide belt in a lifting mode and located on the rear end side of the sliding table, the pressing roller is parallel to the width direction of the guide belt, the carrier roller is located below the guide belt and opposite to the pressing roller, the pressing roller is separated from the carrier roller at the first position, and the pressing roller is tangent to the carrier roller at the second position; the first transmission shaft is located at the front end of the carrier roller and is parallel to the carrier roller, and the carrier roller is in transmission connection with the first transmission shaft. A first synchronous belt wheel of the second driving mechanism and a second synchronous belt wheel are located on the same horizontal line, the second synchronous belt wheel is arranged on the first transmission shaft in a sleeving mode, and a synchronous servo motor is installed on the sliding table and is in transmission connection with a third synchronous belt wheel. The device is easy to operate, accurate in moving position of the rotary screen, stable in operation, not prone to screen twisting and capable of adapting to complex working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to dyeing and finishing equipment especially to a rotary screen linear motion device of combined printing machine. BACKGROUND

[0002] The main way of textile printing in the market is rotary screen printing, its working principle is that a cylindrical metal screen (commonly known as rotary screen) with a pattern makes pure rolling motion on the fabric to be printed, so that the dye in the rotary screen is transferred to the fabric through the mesh of the rotary screen under the pressure of the squeegee, and the production is printed in a continuous feeding and continuous printing mode. Inkjet printing (also known as digital printing in the industry) is a new type of printing method developed in recent years, which includes continuous inkjet printing (industry called singlepass) and intermittent scanning inkjet printing. The motion form of the guide belt supporting the textile during intermittent printing is the process of increasing speed → uniform speed → deceleration → stopping in a cycle. When some special patterns need to be matched with rotary screen, it is necessary to add rotary screen, which requires the linear speed of rotary screen to be absolutely synchronized with the motion speed of the guide belt, so as to accurately match the patterns and meet the process requirements. At the same time, there is another situation that the rotary screen needs to rotate at a constant speed when the intermittent scanning inkjet printing requires the rotary screen to be used for online sizing. Therefore, in the process of rotary screen and digital combined printing, the rotary screen itself needs to rotate at a constant speed while ensuring that the linear speed of the rotary screen is absolutely synchronized with the motion speed of the guide belt.

[0003] The specification of Chinese patent application No. CN200710008652.X discloses a rotary screen flat screen combined multipurpose device and its production process, which comprises a flat screen printing device and a rotary screen printing device. The rotary screen printing device has a machine frame, a rotary screen printing machine base reciprocally and parallelly movable on the guide rail of the machine frame, and a reciprocating parallel movement transmission mechanism for pulling the rotary screen printing machine base. The rotary screen printing machine base is provided with a rotary screen printing mechanism capable of continuous rotary screen printing. This structure enables the intermittent printing assembly to work with the rotary screen printing on the same production line, so that the patterns have continuity. The defect of this structure is that the guide belt runs intermittently, the speed is not constant, but constantly changes, which requires high precision of the motor and mechanical mechanism. Once the working condition changes, for example, the magnetic force of the printing magnetic table changes, the mechanical transmission mechanism wears out, or the thickness of the guide belt changes, the time difference exists in the forward and reverse rotation of the servo motor driving the rotary screen translation, the parameters cannot be changed in time, the above equation cannot be met, the rotary screen appears non-printing marks on the surface of the fabric, which affects the printing quality, and even causes the rotary screen to twist and break.

[0004] In view of the defects of the prior art, it is necessary to improve the driving structure of the rotary screen printing unit during the intermittent motion of the guide belt to ensure the printing effect. UTILITY MODEL CONTENT

[0005] The utility model discloses a rotary screen linear motion device of combined printing machine.

[0006] The technical scheme for realizing the utility model is as follows: a rotary screen linear motion device of combined printing machine, which comprises a sliding table, a first driving mechanism and a second driving mechanism for driving the sliding table to reciprocate in the running direction of fabric, an annular guide belt is installed on the combined printing machine, the front end of the guide belt is a cloth feeding end, the rear end of the guide belt is a cloth discharging end, one sliding table is installed on each side of the movement direction of the guide belt, and a rotary screen printing base is arranged between the two sliding tables; the first driving mechanism comprises a compression roller, a supporting roller and a first transmission shaft, the compression roller is installed in the annular region of the guide belt in a liftable manner and located at the rear end side of the sliding table, the compression roller is parallel to the width direction of the guide belt, the supporting roller is located below the guide belt and arranged opposite to the compression roller, the length of the supporting roller and the compression roller is greater than the width of the guide belt, the two ends of the compression roller extend out of the annular region of the guide belt, the compression roller has a first position and a second position, the compression roller is separated from the supporting roller at the first position, and the compression roller is tangent to the supporting roller at the second position; the first transmission shaft is located at the front end of the supporting roller and arranged in parallel to the supporting roller, and the supporting roller is in transmission connection with the first transmission shaft; one second driving mechanism is installed on each side of the movement direction of the guide belt, the second driving mechanism comprises a synchronous servo motor, a first synchronous belt, a first synchronous pulley, a second synchronous pulley and a third synchronous pulley, the first synchronous pulley and the second synchronous pulley are located on the same horizontal line, the first synchronous pulley is installed on a rack, the second synchronous pulley is sleeved on the first transmission shaft, the first synchronous pulley, the second synchronous pulley and the third synchronous pulley are jointly sleeved on the first synchronous belt, the synchronous servo motor is installed on the sliding table, and the synchronous servo motor is in transmission connection with the third synchronous pulley on the same side of the synchronous servo motor.

[0007] Further, a group of first synchronous pulley assemblies are installed on each side of the movement direction of the guide belt, and the second synchronous pulleys are installed at the two ends of the transmission shaft, so that the stability of the sliding table sliding is improved.

[0008] Further, the first transmission shaft and the supporting roller are in transmission connection through a second synchronous belt pulley assembly.

[0009] Further, an auxiliary pulley is installed on each side of the third synchronous pulley, the horizontal position of the auxiliary pulley is lower than that of the third synchronous pulley, the auxiliary pulley is located outside the first synchronous belt and abuts against the first synchronous belt.

[0010] Further, each of the sliding tables is in sliding connection with a sliding rail.

[0011] The rotary screen linear motion device of the combined printing machine realizes innovation of the driving structure and operation mode of the rotary screen intermittent motion in the guide belt: when the guide belt is running, the rotary screen reciprocating translation motion is driven by the first driving mechanism and the second driving mechanism, the second driving mechanism drives the sliding table to move, the linear speed of the first synchronous belt is consistent with the linear speed of the rotary screen, so that the rotary screen is always consistent with the guide belt without speed difference, and the continuity of the rotary screen printing is ensured; when the guide belt is stationary, the driving motor drives the first synchronous belt to drive the sliding table to move, the linear speed of the relative movement of the guide belt and the sliding table is consistent with the linear speed of the rotary screen, so that the rotary screen is always consistent with the guide belt without speed difference, and the continuity of the rotary screen printing is ensured. In the utility model, the linear speed of the rotary screen rotation is irrelevant to the speed of the guide belt, and the linear speed of the rotary screen rotation is consistent with the linear speed of the first synchronous belt, so that the operation is simple, the rotary screen moving position is accurate, the equipment operation is stable, the rotary screen is not easy to be twisted, and the complex working conditions can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The structure diagram of the combined printing machine is described in the embodiment of the utility model; wherein, the arrow represents the fabric running direction;

[0013] Figure 2 The structure schematic view of the sliding mechanism is described in the embodiment of the utility model. DETAILED DESCRIPTION

[0014] The preferred embodiment of the utility model is described in detail in combination with the drawings.

[0015] As Figure 1 and Figure 2As shown, a rotary screen linear motion device of a combined printing machine comprises a sliding table 1, a first driving mechanism 2 for driving the sliding table 1 to reciprocate in the running direction of the fabric, and a second driving mechanism 3, an annular guide belt 4 is installed on the combined printing machine, the front end of the guide belt 4 is an inlet end 41, the rear end of the guide belt is an outlet end 42, the two sides of the movement direction of the guide belt 4 are respectively provided with a sliding table 1, a rotary screen printing base 10 is arranged between the two sliding tables 1, and each sliding table 1 is slidably connected with a sliding rail 5; the first driving mechanism 2 comprises a compression roller 21, a supporting roller 22, and a first transmission shaft 23, the compression roller 21 is installed in the annular area of the guide belt 4 and located at the rear end side of the sliding table 1 in a lifting manner through a lifting cylinder 24, and the compression roller 21 is parallel to the width direction of the guide belt 4; the supporting roller 22 is located below the guide belt 4 and is arranged opposite to the compression roller 21, the lengths of the supporting roller 22 and the compression roller 22 are greater than the width of the guide belt 4, the two ends of the compression roller 21 extend from the annular area of the guide belt 1, the compression roller 21 has a first position and a second position, the compression roller 21 is separated from the supporting roller 22 at the first position, and the compression roller 21 is tangent to the supporting roller 22 at the second position; the first transmission shaft 23 is located at the front end of the supporting roller and is arranged in parallel with the supporting roller 22, and the supporting roller 22 and the first transmission shaft 23 are drivingly connected through a second synchronous belt assembly 25; the two sides of the movement direction of the guide belt are respectively provided with a second driving mechanism 3, the second driving mechanism 3 comprises a synchronous servo motor 31, a first synchronous belt 32, a first synchronous pulley 33, a second synchronous pulley 34, and a third synchronous pulley 35, the first synchronous pulley 33 and the second synchronous pulley 34 are located on the same horizontal line, the first synchronous pulley 35 is installed on the rack, the second synchronous pulley 34 is sleeved on the first transmission shaft 23, the first synchronous pulley 33, the second synchronous pulley 34, and the third synchronous pulley 35 are collectively sleeved on the first synchronous belt 32, the synchronous servo motor 31 is installed on the sliding table 1, and the synchronous servo motor 31 is drivingly connected with the third synchronous pulley 35 on the same side of the synchronous servo motor; the two sides of the third synchronous pulley 35 are respectively provided with an auxiliary pulley 36, the horizontal position of the auxiliary pulley 36 is slightly lower than that of the third synchronous pulley 35, the auxiliary pulley 36 is located outside the first synchronous belt 32 and abuts against the first synchronous belt 32.

[0016] The combined printing machine in the embodiment comprises a digital printing unit 100, and rotary screen printing units 200 are installed at the front and rear ends of the digital printing unit 100. When rotary screen sizing or digital printing unit overprinting is required, the guide belt 4 is intermittently moved, and the control method for driving the rotary screen printing unit to move linearly by the driving mechanism comprises the following steps.

[0017] 1) When the guide belt 1 runs, the lifting cylinder 24 extends to drive the compression roller 21 to descend to the second position, at this time the compression roller 21 is tangent to the supporting roller 22, the guide belt 4 is clamped by the supporting roller 22 and the compression roller 21, the guide belt 4 drives the supporting roller 22 to rotate, the supporting roller 22 transmits power to the first transmission shaft 23, and then drives the first synchronous belt 32 to rotate, so that the linear speed of the first synchronous belt 32 is consistent with the linear speed of the guide belt 4; when the synchronous servo motor 31 rotates, it drives the sliding table 1 to move back and forth along the synchronous belt 32, which reflects that the rotary screen does pure rolling along the guide belt 1, so that the moving trolley keeps absolute following regardless of the change of the guide belt speed.

[0018] 2) When the guide belt 1 stops moving, the compression roller 21 rises, only the first synchronous belt 32 is driven to rotate by the synchronous servo motor 31, and the linear speed of the rotary screen is consistent with the linear speed of the first synchronous belt 32; thereby ensuring that the rotary screen always has no speed difference with the guide belt, and further ensuring the continuity of rotary screen printing.

[0019] The utility model discloses can only install a group of first synchronous pulley subassembly, when the movement direction of guide belt is installed with a group of first synchronous pulley subassembly respectively on both sides, and the equipment operation stability is higher, the sliding table can be slidably connected with the slide rail, and also can be connected by the rolling wheel installed on the sliding table, the compression roller in the embodiment is lifted and is operated by the lifting cylinder installed on the both axle ends top, and its structure is most compact, but the lifting cylinder can also be installed below the both axle ends of compression roller.

[0020] The above-mentioned is only the embodiment of the utility model, and does not limit the patent range of the utility model, and the equivalent process transformation of the utility model specification content, or direct or indirect application in other related technical fields, are all included in the patent protection range of the utility model.

Claims

1. A rotary screen linear motion device for a combination printing machine, characterized by: The combined printing machine comprises a slide, a first driving mechanism for driving the slide to move back and forth in the running direction of the fabric, and a second driving mechanism, an annular guide belt is installed on the combined printing machine, the front end of the guide belt is the cloth feeding end, the rear end of the guide belt is the cloth discharging end, two slide tables are respectively installed on the two sides of the movement direction of the guide belt, and a rotary screen printing base is arranged between the two slide tables; the first driving mechanism comprises a compression roller, a supporting roller and a first transmission shaft, the compression roller is installed in the annular area of the guide belt and located at the rear end side of the slide, the compression roller is parallel to the width direction of the guide belt, the supporting roller is located below the guide belt and opposite to the compression roller, the length of the supporting roller and the compression roller is greater than the width of the guide belt, and the two ends of the compression roller extend from the annular area of the guide belt; the compression roller has a first position and a second position, the compression roller is away from the supporting roller at the first position, and the compression roller is tangent to the supporting roller at the second position; the first transmission shaft is located at the front end of the supporting roller and is arranged in parallel with the supporting roller, and the supporting roller is in transmission connection with the first transmission shaft; one second driving mechanism is installed on any one side of the movement direction of the guide belt, the second driving mechanism comprises a synchronous servo motor, a first synchronous belt, a first synchronous pulley, a second synchronous pulley and a third synchronous pulley, the first synchronous pulley and the second synchronous pulley are located on the same horizontal line, the first synchronous pulley is installed on the rack, the second synchronous pulley is sleeved on the first transmission shaft, the first synchronous pulley, the second synchronous pulley and the third synchronous pulley are sleeved on the first synchronous belt, and the synchronous servo motor is installed on the slide.

2. The rotary screen linear motion device of a combination printing machine according to claim 1, characterized in that: A group of first synchronous pulley assemblies are respectively installed on the two sides of the movement direction of the guide belt, and two second synchronous pulleys are respectively installed on the two ends of the transmission shaft.

3. The rotary screen linear motion device of a combination printing machine according to claim 2, characterized in that: The first transmission shaft and the supporting roller are in transmission connection through a second synchronous belt pulley assembly.

4. The rotary screen linear motion device of a combination printing machine according to claim 2, characterized in that: An auxiliary pulley is respectively installed on the two sides of the third synchronous pulley, the horizontal position of the auxiliary pulley is lower than that of the third synchronous pulley, the auxiliary pulley is located outside the first synchronous belt and abuts against the first synchronous belt.

5. The rotary screen linear motion device of a combination printing machine according to claim 4, characterized in that: Each slide is in sliding connection with a slide rail.

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