Tablet bed spray device and control method for coating machine

Abstract

Tablet bed spray device and control method for coating machine. The invention mainly solves the problem that the spray device of the existing coating machine can only spray in a directional manner when spraying the tablet bed in the drum, resulting in poor use effect. The invention comprises a main shaft (2) rotatably mounted on the shell (1) of the coating machine, the main shaft being driven by a first power source (91) to rotate along its own axis, and characterized in that: a retractable mounting plate (3) driven by a second power source (92) is provided on the outer wall of the main shaft, and a spray head (4) is mounted on the mounting plate. The present invention provides a tablet bed spray device and control method for coating machine, wherein the spray head can rotate and retract, and can be adjusted according to different spraying conditions.

Description

Technical Field

[0001] The invention belongs to the field of coating machines, and in particular relates to a coating machine tablet bed spraying device and a control method. Background Art

[0002] Tablets or pills are a kind of medicine that is easy to carry and use. Due to their many characteristics, they are widely used. Some tablets have a strong bitter taste. In order to make the taste of the tablets better, a layer of sugar coating will be wrapped on the surface of the tablets to make them have a certain sweetness, so a coating machine will be used.

[0003] The spray device of the existing coating machine can only spray in a directional manner when spraying the tablet bed in the drum, and the use effect is not good. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a coating machine tablet bed spray device and a control method, which mainly solves the problem that the current coating machine spray device can only spray in a directional manner when spraying the tablet bed in the drum, resulting in poor use effect.

[0005] The technical solution adopted by the present invention is:

[0006] The tablet bed spray device of the coating machine comprises a main shaft rotatably mounted on the shell of the coating machine, the main shaft is driven by a first power source to rotate along its own axis, an outer wall of the main shaft is provided with a retractable mounting plate driven by a second power source, and a spray head is mounted on the mounting plate.

[0007] The first power source is a servo motor.

[0008] The first power source is connected to the main shaft through a speed reducer.

[0009] The outer wall of the main shaft is provided with a support bearing, and the support bearing includes a connecting flange, and the connecting flange is connected to the housing through a fastener.

[0010] The second power source is a cylinder, and the cylinder includes a driving rod, and the driving rod is connected to the mounting plate.

[0011] It also includes telescopic rods correspondingly arranged on both sides of the cylinder, one end of the telescopic rod is connected to the mounting plate, and the other end is connected to the outer wall of the main shaft.

[0012] The mounting plate is also provided with a distance sensor.

[0013] A control method for a tablet bed spray device of a coating machine, comprising a control mechanism and the tablet bed spray device of the coating machine as described above, comprising the following steps:

[0014] Step 1: Set the preset distance D between the spray gun and the tablet bed through the input unit. Start the drum of the coating machine and begin to rotate.

[0015] Step 2: The first distance measuring sensor measures the distance s1 from the surface of the tablet bed, and the second distance measuring sensor measures the distance s2 from the surface of the tablet bed. When s1 > s2, the control mechanism controls the first power source to rotate the main shaft, and the rotation direction is from the position where the first distance measuring sensor is located towards the position where the second distance measuring sensor is located.

[0016] When s1 < s2, the control mechanism controls the first power source to rotate the main shaft, and the rotation direction is from the position where the second distance measuring sensor is located towards the position where the first distance measuring sensor is located.

[0017] When |s1 - s2| ≤ 5 mm, the control mechanism controls the rotation motor to stop rotating.

[0018] The actual tablet bed distance d = d1 + d2 = s1 * cosθ + d2,

[0019] where d1 = s1 * cosθ, θ is the installation angle of the laser distance measuring sensor, and d2 is the vertical distance between the front end of the nozzle and the front end of the first distance measuring sensor.

[0020] When d ≥ D: The control mechanism controls the driving rod of the cylinder to retract.

[0021] When d ≤ D: The control mechanism controls the driving rod of the cylinder to extend.

[0022] When |d - D| ≤ 3 mm, the control mechanism controls the cylinder to stop telescoping.

[0023] The input unit is a touch screen.

[0024] The first distance measuring sensor and the second distance measuring sensor are laser distance measuring sensors.

[0025] The beneficial effects of the present invention are: The present invention provides a tablet bed spraying device and a control method for a coating machine, and its nozzle can rotate and telescope, and can be adjusted according to different spraying situations. Brief Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram during the use of an embodiment of the present invention.

[0027] Figure 2 It is a partial cross-sectional view of an embodiment of the present invention.

[0028] Figure 3 It is a partial three-dimensional schematic diagram of an embodiment of the present invention. Detailed Description of the Embodiment

[0029] The present invention is further described below in conjunction with the accompanying drawings: As shown in the figure, the coating machine tablet bed spray device includes a main shaft 2 rotatably mounted on the housing 1 of the coating machine, the main shaft is driven by the first power source 91 to rotate along its own axis, and the outer wall of the main shaft is provided with a retractable mounting plate 3 driven by the second power source 92, and the mounting plate is equipped with a nozzle 4. The first power source can be a motor, which can be manually operated to rotate the main shaft, thereby rotating the nozzle directly or indirectly mounted on the outer wall of the main shaft. Further, the nozzle is mounted on the mounting plate, and the mounting plate is driven forward and backward by the second power source to achieve the adjustment of different spraying heights. The present invention provides a coating machine tablet bed spray device and a control method, wherein the nozzle can rotate and retract, and can be adjusted according to different spraying conditions. As an optional solution, the second power source is installed in the housing through a connecting plate.

[0030] In this embodiment, as shown in the figure, the first power source is a servo motor, which is convenient for docking with an automatic control system to achieve automated operation.

[0031] In this embodiment, as shown in the figure, the first power source is connected to the main shaft through a reducer 93. Through the connection of the reducer, higher power can be provided.

[0032] In this embodiment, as shown in the figure, a support bearing 21 is provided on the outer wall of the main shaft, and the support bearing includes a connecting flange 22, and the connecting flange is connected to the housing through a fastener.

[0033] In this embodiment, as shown in the figure, the second power source is a cylinder, and the cylinder includes a driving rod 911, and the driving rod is connected to the mounting plate.

[0034] In this embodiment, as shown in the figure, it also includes telescopic rods 31 correspondingly arranged on both sides of the cylinder, one end of the telescopic rod is connected to the mounting plate, and the other end is connected to the outer wall of the main shaft. The telescopic rods are arranged at both ends of the mounting plate, so that the mounting plate can move forward and backward more smoothly.

[0035] In this embodiment, as shown in the figure, a distance sensor is also provided on the mounting plate.

[0036] A control method for a tablet bed spray device of a coating machine, comprising a control mechanism and the tablet bed spray device of the coating machine as described above, comprising the following steps:

[0037] Step 1: The preset distance D between the spray gun and the tablet bed is set through the input unit, and the drum of the coating machine starts to rotate;

[0038] Step 2: The first distance measuring sensor measures the distance s1 from the surface of the wafer bed, and the second distance measuring sensor measures the distance s2 from the surface of the wafer bed. When s1 > s2, the control mechanism controls the first power source to rotate the main shaft, and the rotation direction is from the position where the first distance measuring sensor is located towards the position where the second distance measuring sensor is located;

[0039] When s1 < s2, the control mechanism controls the first power source to rotate the main shaft, and the rotation direction is from the position where the second distance measuring sensor is located towards the position where the first distance measuring sensor is located;

[0040] When |s1 - s2| ≤ 5 mm, the control mechanism controls the rotary motor to stop rotating;

[0041] The actual wafer bed distance d = d1 + d2 = s1 * cosθ + d2,

[0042] where d1 = s1 * cosθ, θ is the installation angle of the laser distance measuring sensor, and d2 is the vertical distance between the front end of the nozzle and the front end of the first distance measuring sensor.

[0043] When d ≥ D: The control mechanism controls the driving rod of the cylinder to retract.

[0044] When d ≤ D: The control mechanism controls the driving rod of the cylinder to extend.

[0045] When |d - D| ≤ 3 mm, the control mechanism controls the cylinder to stop telescoping.

[0046] The control mechanism can be a PLC or a microcomputer, and controls the first power source and the second power source to make the nozzle rotate and extend automatically according to the dimensions obtained by the first distance measuring sensor and the second distance measuring sensor, with high working efficiency. The above comparison process is all completed by the PLC.

[0047] In this embodiment, as shown in the figure, the input unit is a touch screen, which is convenient for control and makes the input more intuitive.

[0048] In this embodiment, as shown in the figure, the first distance measuring sensor and the second distance measuring sensor are laser distance measuring sensors.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements made based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A control method for a tablet bed spray device of a coating machine, the tablet bed spray device of the coating machine comprising a main shaft (2) rotatably mounted on a housing (1) of the coating machine, the main shaft being driven by a first power source (91) to rotate along its own axis, a mounting plate (3) being retractable and driven by a second power source (92) being provided on an outer wall of the main shaft, a spray head (4) being mounted on the mounting plate; a distance sensor being further provided on the mounting plate; the characteristics: It also includes a control mechanism, which comprises the following steps: Step 1: Set the preset distance D between the spray gun and the tablet bed through the input unit. The drum of the coating machine starts to rotate. Step 2: The first distance measuring sensor (51) measures the distance s1 from the tablet bed surface, and the second distance measuring sensor (52) measures the distance s2 from the tablet bed surface. When s1 > s2, the control mechanism controls the first power source to rotate the main shaft, and the rotation direction is from the position where the first distance measuring sensor is located towards the position where the second distance measuring sensor is located. When s1 < s2, the control mechanism controls the first power source to rotate the main shaft, and the rotation direction is from the position where the second distance measuring sensor is located towards the position where the first distance measuring sensor is located. When |s1 - s2| ≤ 5 mm, the control mechanism controls the rotation motor to stop rotating. The actual tablet bed distance d = d1 + d2 = s1 * cosθ + d2, where d1 = s1 * cosθ, θ is the installation angle of the laser distance measuring sensor, and d2 is the vertical distance between the front end of the nozzle and the front end of the first distance measuring sensor. When d ≥ D: The control mechanism controls the driving rod of the cylinder to retract. When d ≤ D: The control mechanism controls the driving rod of the cylinder to extend. When |d - D| ≤ 3 mm, the control mechanism controls the cylinder to stop telescoping.

2. The control method of the tablet bed spray device of the coating machine according to claim 1, characterized in that: The input unit is a touch screen.

3. The control method of the tablet bed spray device of the coating machine according to claim 1, characterized in that: The first distance measuring sensor and the second distance measuring sensor are laser distance measuring sensors.

4. The control method of the tablet bed spray device of the coating machine according to claim 1, characterized in that: The first power source is a servo motor.

5. The control method of the tablet bed spray device of the coating machine according to claim 1, characterized in that: The first power source is connected to the main shaft through a speed reducer (93).

6. The control method of the tablet bed spray device of the coating machine according to claim 1, characterized in that: A support bearing (21) is provided on the outer wall of the main shaft. The bearing includes a connecting flange (22), and the connecting flange is connected to the housing through fasteners.

7. The control method of the tablet bed spray device of the coating machine according to claim 1, characterized in that: The second power source is a cylinder. The cylinder includes a driving rod, and the driving rod is connected to the mounting plate.

8. The control method of the tablet bed spray device of the coating machine according to claim 7, characterized in that: It also includes telescopic rods (31) correspondingly arranged on both sides of the cylinder. One end of the telescopic rod is connected to the mounting plate, and the other end is connected to the outer wall of the main shaft.

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