A flipping device and method for screen printing ceramic resistor elements

Abstract

This invention discloses a flipping device and method for screen printing ceramic resistor elements. The device includes a fixture for loading ceramic resistor elements, a conveying mechanism for transporting the fixture, and a flipping mechanism for flipping the ceramic resistor elements. The fixture has multiple placement slots. The flipping mechanism includes a flipping frame, a flipping drive mechanism, a vertical drive mechanism, and gripping components for gripping the fixture. Two sets of gripping components are arranged opposite each other on the flipping frame. Each set of gripping components includes a gripping element and a gripping drive element for driving the gripping element closer to or away from the fixture. When the fixture loaded with ceramic resistor elements to be flipped is conveyed to the gripping station, the two sets of gripping components are located above and below the fixture, respectively. The upper gripping component grips an empty fixture with its placement slots facing downwards. This invention can automatically complete the flipping of large batches of ceramic resistor elements, saving time and labor, and improving printing efficiency.

Description

Technical Field

[0001] This invention relates to screen printing technology, and more specifically to a flipping device and method for screen printing ceramic resistor elements. Background Technology

[0002] Screen printing belongs to the stencil printing technique, one of the four major printing methods (relief printing, gravure printing, offset printing, and stencil printing). In screen printing, the mesh openings in the image areas allow ink to pass through onto the substrate, while the remaining areas of the stencil are blocked, preventing ink from passing through and creating blank areas on the substrate. Screen printing involves weaving silk, synthetic fibers, or metal wires into a mesh, stretching it tightly onto a frame, and creating the stencil using manual cutting or photochemical methods. Only the image areas on the stencil allow ink to pass through, while the non-image areas are completely blocked, preventing ink from seeping through.

[0003] The materials that can be printed are very diverse, spanning various industries, such as paper printing, plastic printing, wood product printing, metal product printing, glass and ceramic product printing, signage printing, and circuit board printing. In the printing process of ceramic resistors, for those requiring double-sided printing, after printing one side, the ceramic resistor needs to be flipped 180° so the other side is facing up before printing again. However, in current printing processes, large quantities of ceramic resistors need to be flipped manually, which is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems and provide a flipping device for screen printing of ceramic resistor elements. This flipping device can automatically complete the flipping of a large number of ceramic resistor elements, saving time and effort and improving printing efficiency.

[0005] Another object of the present invention is to provide a flipping method for screen printing of ceramic resistor elements.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A flipping device for screen printing ceramic resistor elements includes a fixture for loading ceramic resistor elements, a conveying mechanism for conveying the fixture, and a flipping mechanism for flipping the ceramic resistor elements.

[0008] The fixture is provided with multiple placement slots;

[0009] The flipping mechanism includes a flipping frame, a flipping drive mechanism for driving the flipping frame to rotate, a vertical drive mechanism for driving the flipping frame to move vertically, and a gripping assembly for gripping the fixture. The gripping assembly is provided in two sets and is arranged opposite to each other on the flipping frame. Each set of gripping assemblies includes a gripping component and a gripping drive component for driving the gripping component to move closer to or away from the fixture. When a fixture loaded with multiple ceramic resistor elements to be flipped is transported to the gripping station, the two sets of gripping assemblies are located above and below the fixture, respectively. The gripping assembly located above holds an unloaded fixture with its placement slot facing downwards.

[0010] In a preferred embodiment of the present invention, each group of gripping components further includes a gripping mounting plate, and multiple gripping members are provided and fixedly mounted on the gripping mounting plate, wherein the gripping drive member is poweredly connected to the gripping mounting plate.

[0011] Furthermore, the gripping drive component is a cylinder, the cylinder body of which is fixed on the tilting frame, and the telescopic rod of which is connected to the gripping mounting plate.

[0012] Furthermore, a guide structure is provided between the gripping mounting plate and the flipping frame.

[0013] Furthermore, the gripping component is a suction cup connected to the negative pressure device.

[0014] In a preferred embodiment of the present invention, the flipping drive mechanism includes a flipping drive motor and a flipping transmission assembly. The flipping transmission assembly includes a flipping transmission belt and two flipping transmission pulleys. The two flipping transmission pulleys are respectively connected to the output shaft of the flipping drive motor and the flipping frame. The flipping transmission belt is connected to the two flipping transmission pulleys, and the flipping frame is rotatably connected to a support. With the above structure, under the drive of the flipping drive motor, the flipping frame can rotate with the gripping assembly, thereby completing the flipping operation of the fixture.

[0015] Furthermore, the vertical drive mechanism includes a vertical moving plate and a vertical drive cylinder. The telescopic rod of the vertical drive cylinder is fixedly connected to the vertical moving plate, and the support is fixedly mounted on the vertical moving plate. With the above structure, under the drive of the vertical drive motor, the tilting frame can move vertically with the gripping assembly, thereby avoiding the conveying mechanism and preventing collisions during tilting.

[0016] In a preferred embodiment of the present invention, the conveying mechanism includes conveying guide rails, conveyor belts, and a conveying drive mechanism. Two conveying guide rails are arranged perpendicular to the direction of fixture conveying. The vertical drive mechanism is located on one side of the two conveying guide rails, with the conveying guide rail closer to the vertical drive mechanism having a notch to avoid the tilting frame. Two sets of conveyor belts are arranged perpendicular to the direction of fixture conveying, with one set of conveyor belts corresponding to the conveying guide rail closer to the vertical drive mechanism having two conveyor belts located at both ends of the notch. With this structure, before tilting, the vertical drive mechanism drives the tilting frame downwards, and after passing through the notch, the tilting frame stops at the gripping station (corresponding to the position of the notch). The conveying drive mechanism drives the conveyor belts to move the fixture forward until it stops above the notch, at which point the two gripping components are located above and below the fixture, respectively, and then the tilting operation begins.

[0017] A method for flipping the screen during screen printing of ceramic resistor elements includes the following steps:

[0018] The fixture with the printed side of the ceramic resistor element is placed on the conveying mechanism, and the conveying mechanism transports the fixture toward the flipping mechanism, at which point the printed side of the ceramic resistor element is facing upwards.

[0019] When the fixture containing the ceramic resistor element with the printed side is transported to the gripping station, the two gripping components are located above and below the fixture respectively. The gripping component located above grips the unloaded fixture with the placement slot facing down.

[0020] The gripping drive of the gripping component located below drives the gripper to move upward and grasp the fixture containing the ceramic resistor element with the printed side. The gripping drive of the gripping component located above drives the gripper to move downward, so that the unloaded fixture with the placement slot facing down covers the fixture containing the ceramic resistor element with the printed side. At this time, the positions of the multiple placement slots of the fixture located above correspond one-to-one with the positions of the multiple ceramic resistor elements in the fixture located below.

[0021] The vertical drive mechanism drives the tilting frame to move upward, moving the two fixtures away from the conveying mechanism;

[0022] The flipping mechanism drives the flipping frame to flip 180 degrees, so that the originally unloaded fixture moves to the bottom and takes over the ceramic resistor element. At this time, the printed side of the ceramic resistor element is facing down, and the fixture that originally loaded the ceramic resistor element is on the top and is in an inverted unloaded state, ready to receive the next set of flipped ceramic resistor elements.

[0023] The vertical drive mechanism drives the tilting frame to move downwards, placing the fixture containing the ceramic resistor element onto the conveying mechanism, which then continues to transport it downwards.

[0024] By following the above steps, the ceramic resistor element can be flipped over repeatedly.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1. The flipping device of the present invention, by setting two sets of gripping components, first covers the upper empty fixture on the lower fixture containing ceramic resistor elements, and then flips it 180 degrees, so that the ceramic resistor elements can be transferred between the two fixtures. The flipping operation of a large number of ceramic resistor elements can be completed simultaneously, saving time and effort and improving printing efficiency.

[0027] 2. The ceramic resistor element can be flipped and transferred directly between two fixtures without the need for a transfer mechanism or other structures, making the structure simple and easy to operate. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the flipping device for screen printing of ceramic resistor elements according to the present invention.

[0029] Figure 2 This is a three-dimensional structural diagram of the flipping mechanism of the present invention.

[0030] Figure 3 This is a side view of the flipping mechanism of the present invention.

[0031] Figure 4 This is a partial three-dimensional structural diagram of the conveying mechanism of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to fully understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0033] See Figure 1-3 The flipping device for screen printing ceramic resistor elements in this embodiment includes a fixture 2 for loading ceramic resistor elements 1, a conveying mechanism for conveying the fixture 2, and a flipping mechanism for flipping the ceramic resistor elements 1. The fixture 2 is provided with multiple placement slots. The flipping mechanism includes a flipping frame 3, a flipping drive mechanism for driving the flipping frame 3 to rotate, a vertical drive mechanism for driving the flipping frame 3 to move vertically, and a gripping assembly for gripping the fixture 2. The gripping assembly is provided in two sets and is arranged opposite to each other on the flipping frame 3. Each set of gripping assemblies includes a gripping element 4 and a gripping drive element 5 for driving the gripping element 4 to move closer to or away from the fixture 2. When the fixture 2 loaded with multiple ceramic resistor elements 1 to be flipped is conveyed to the gripping station, the two sets of gripping assemblies are located above and below the fixture 2, respectively. The gripping assembly located above grips the unloaded fixture 2 with the placement slots facing downwards.

[0034] See Figure 1-3 Each gripping assembly also includes a gripping mounting plate 6. Multiple gripping components 4 are provided and are all fixedly mounted on the gripping mounting plate 6. The gripping drive component 5 is poweredly connected to the gripping mounting plate 6.

[0035] Furthermore, the gripping drive component 5 is a cylinder, the cylinder body of which is fixed on the flipping frame 3, and the telescopic rod of which is connected to the gripping mounting plate 6.

[0036] Furthermore, a guide structure is provided between the gripping mounting plate 6 and the flipping frame 3.

[0037] Furthermore, the gripping component 4 is a suction cup connected to the negative pressure device.

[0038] See Figure 1-3 The flipping drive mechanism includes a flipping drive motor 7 and a flipping transmission assembly. The flipping transmission assembly includes a flipping transmission belt and two flipping transmission pulleys. The two flipping transmission pulleys are respectively connected to the output shaft of the flipping drive motor 7 and the flipping frame 3. The flipping transmission belt is connected to the two flipping transmission pulleys. The flipping frame 3 is rotatably connected to the support 8. With the above structure, under the drive of the flipping drive motor 7, the flipping frame 3 can rotate with the gripping assembly, thereby completing the flipping operation of the fixture 2.

[0039] Furthermore, the vertical drive mechanism includes a vertical moving plate 9 and a vertical drive cylinder 10. The telescopic rod of the vertical drive cylinder 10 is fixedly connected to the vertical moving plate 9, and the support 8 is fixedly mounted on the vertical moving plate 9. With the above structure, under the drive of the vertical drive motor, the tilting frame 3 can move vertically with the gripping assembly, thereby avoiding the conveying mechanism and preventing collisions during tilting.

[0040] See Figure 4The conveying mechanism includes a conveying guide rail 11, a conveyor belt 12, and a conveying drive mechanism. The conveying guide rail 11 has two sections arranged along a direction perpendicular to the conveying direction of the fixture 2. The vertical drive mechanism is located on one side of the two conveying guide rails 11, wherein the conveying guide rail 11 closer to the vertical drive mechanism has a notch 11-1 for avoiding the tilting frame 3. The conveyor belt 12 has two sets arranged along a direction perpendicular to the conveying direction of the fixture 2. The set of conveyor belts 12 corresponding to the conveying guide rail 11 closer to the vertical drive mechanism has two conveyor belts 12, which are located at both ends of the notch 11-1. With the above structure, before flipping, the vertical drive mechanism drives the flipping frame 3 to move downwards. After passing through the gap 11-1, the flipping frame 3 stops at the gripping station (corresponding to the position of the gap 11-1). The conveyor drive mechanism drives the conveyor belt 12 to move the fixture 2 forward until the fixture 2 stops above the gap 11-1. At this time, the two gripping components are located above and below the fixture 2 respectively, and then the flipping operation begins.

[0041] See Figure 1-4 The flipping method for screen printing ceramic resistor elements in this embodiment includes the following steps:

[0042] The fixture 2, which has the printed side of the ceramic resistor element 1, is placed on the conveying mechanism and then conveyed by the conveying mechanism to the flipping mechanism, so that the printed side of the ceramic resistor element 1 is facing upward.

[0043] When the fixture 2, containing the ceramic resistor element 1 with its printed side facing down, is conveyed to the gripping station, two gripping assemblies are positioned above and below the fixture 2, respectively. The upper gripping assembly grips the unloaded fixture 2 with its placement slot facing down. Figure 3 .

[0044] The gripping drive 5 of the gripping assembly located below drives the gripping member 4 to move upward and grasp the fixture 2 containing the ceramic resistor element 1 with the printed side. The gripping drive 5 of the gripping assembly located above drives the gripping member 4 to move downward, so that the unloaded fixture 2 with the placement slot facing downward covers the fixture 2 containing the ceramic resistor element 1 with the printed side. At this time, the positions of the multiple placement slots of the fixture 2 located above correspond one-to-one with the positions of the multiple ceramic resistor elements 1 in the fixture 2 located below.

[0045] The vertical drive mechanism drives the tilting frame 3 to move upward, passing through the gap 11-1 to avoid the conveying mechanism, so that the two fixtures 2 are away from the conveying mechanism to prevent interference.

[0046] The flipping mechanism drives the flipping frame 3 to flip 180 degrees, so that the originally unloaded fixture 2 moves to the bottom and takes over the ceramic resistor element 1. At this time, the printed side of the ceramic resistor element 1 is facing down, and the fixture 2 that originally loaded the ceramic resistor element 1 is located on top and is in an inverted unloaded state, ready to receive the next set of flipped ceramic resistor elements 1.

[0047] The vertical drive mechanism drives the flipping frame 3 to move downwards, passing through the notch 11-1 to avoid the conveying mechanism, and then places the fixture 2 containing the ceramic resistor element 1 onto the conveying mechanism, which continues to transport it downwards. This process is repeated to continuously flip the ceramic resistor element 1.

[0048] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A flipping device for screen printing of ceramic resistor elements, characterized in that, It includes a fixture for loading ceramic resistor elements, a conveying mechanism for conveying the fixture, and a flipping mechanism for flipping the ceramic resistor elements. The fixture is provided with multiple placement slots; The flipping mechanism includes a flipping frame, a flipping drive mechanism for driving the flipping frame to rotate, a vertical drive mechanism for driving the flipping frame to move vertically, and a gripping assembly for gripping the fixture. The gripping assembly is provided in two sets and is arranged opposite to each other on the flipping frame. Each set of gripping assemblies includes a gripping component and a gripping drive component for driving the gripping component to move closer to or away from the fixture. When a fixture loaded with multiple ceramic resistor elements to be flipped is transported to the gripping station, the two sets of gripping assemblies are located above and below the fixture, respectively. The gripping assembly located above holds an empty fixture with its placement slot facing downwards. The flipping drive mechanism includes a flipping drive motor and a flipping transmission assembly. The flipping transmission assembly includes a flipping transmission belt and flipping transmission pulleys. There are two flipping transmission pulleys, which are respectively connected to the output shaft of the flipping drive motor and the flipping frame. The flipping transmission belt is connected to the two flipping transmission pulleys, and the flipping frame is rotatably connected to the support. The conveying mechanism includes a conveying guide rail, a conveyor belt, and a conveying drive mechanism. The conveying guide rail has two rails arranged along a direction perpendicular to the conveying direction of the fixture. The vertical drive mechanism is located on one side of the two conveyor rails, wherein the conveyor rail closer to the vertical drive mechanism has a notch for avoiding the tilting frame; the conveyor belts are provided in two sets and arranged along the direction perpendicular to the jig conveying, and the set of conveyor belts corresponding to the conveyor rail closer to the vertical drive mechanism has two conveyor belts, which are located at both ends of the notch.

2. The flipping device for screen printing of ceramic resistor elements according to claim 1, characterized in that, Each gripping assembly also includes a gripping mounting plate. Multiple gripping components are provided and fixedly mounted on the gripping mounting plate. The gripping drive component is poweredly connected to the gripping mounting plate.

3. The flipping device for screen printing of ceramic resistor elements according to claim 2, characterized in that, The gripping drive component is a cylinder, the cylinder body of which is fixed on the tilting frame, and the telescopic rod of which is connected to the gripping mounting plate.

4. The flipping device for screen printing of ceramic resistor elements according to claim 2, characterized in that, A guide structure is provided between the gripping mounting plate and the flipping frame.

5. The flipping device for screen printing of ceramic resistor elements according to claim 2, characterized in that, The gripping component is a suction cup connected to a negative pressure device.

6. The flipping device for screen printing of ceramic resistor elements according to claim 1, characterized in that, The vertical drive mechanism includes a vertical moving plate and a vertical drive cylinder. The telescopic rod of the vertical drive cylinder is fixedly connected to the vertical moving plate, and the support is fixedly mounted on the vertical moving plate.

7. A method for flipping a screen-printing device for ceramic resistor elements according to any one of claims 1-6, characterized in that, Includes the following steps: The fixture with the printed side of the ceramic resistor element is placed on the conveying mechanism, and the conveying mechanism transports the fixture toward the flipping mechanism, at which point the printed side of the ceramic resistor element is facing upwards. When the fixture containing the ceramic resistor element with the printed side is transported to the gripping station, the two gripping components are located above and below the fixture respectively. The gripping component located above grips the unloaded fixture with the placement slot facing down. The gripping drive of the gripping component located below drives the gripper to move upward and grasp the fixture containing the ceramic resistor element with the printed side. The gripping drive of the gripping component located above drives the gripper to move downward, so that the unloaded fixture with the placement slot facing down covers the fixture containing the ceramic resistor element with the printed side. At this time, the positions of the multiple placement slots of the fixture located above correspond one-to-one with the positions of the multiple ceramic resistor elements in the fixture located below. The vertical drive mechanism drives the tilting frame to move upward, moving the two fixtures away from the conveying mechanism; The flipping mechanism drives the flipping frame to flip 180 degrees, so that the originally unloaded fixture moves to the bottom and takes over the ceramic resistor element. At this time, the printed side of the ceramic resistor element is facing down, and the fixture that originally loaded the ceramic resistor element is on the top and is in an inverted unloaded state, ready to receive the next set of flipped ceramic resistor elements. The vertical drive mechanism drives the flipping frame to move downwards, placing the fixture containing the ceramic resistor element onto the conveying mechanism, which then continues to transport the ceramic resistor element downwards to complete the flipping operation.

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