Screw fastening type supporting mechanism for screen printing machine
By using a screw-tightening support mechanism in the SMT equipment, the PCBA plate damage caused by the deviation of the magnetic pin bar is solved, the stability and position adjustment of the support bar are achieved, and the product quality of long-term production is improved.
Patent Information
- Application Number
- CN202422433082.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-09
AI Technical Summary
In existing SMT equipment, the magnetic pole support mechanism is prone to deviating due to foreign objects or abnormal conditions, and damages the reverse components of the PCBA plate, especially in long-term production.
The screw-tightening support mechanism is adopted to ensure the stability and position of the support rod by the design of screw locking plates and support components, avoiding loosening and offset.
It improves the stability and reliability of the support rod, avoids damage to PCBA boards caused by deviation, and is suitable for long-term production and improves product quality.
Smart Images
Figure CN223278724U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of parts for screen printing machines, in particular to a screw-fastening support mechanism for a screen printing machine. Background Art
[0002] SMT, short for Surface Mounting Technology, is one of the most popular technologies and processes in the electronics assembly industry. It involves mounting surface mount components (SMC / SMD, also known as chip components in Chinese) in a matrix arrangement of pinless, short-lead, or ball-shaped packages on the surface of a printed circuit board (PCB) or other substrate, then soldering them together using methods such as reflow soldering or dip soldering.
[0003] A printing press is a device on an SMT production line that applies solder paste to printed circuit boards. It features inlet and outlet guides, uses side clamps or vacuum suction to secure the printed circuit board, and uses a rubber or metal scraper to transfer solder paste through the stencil pattern openings onto the pads of the printed circuit board.
[0004] Supports are commonly used in SMT equipment. They are often made of metal or plastic, and their height is determined by the distance between the guide rail and the support plate. Metal supports prevent static buildup and are commonly found in equipment requiring clamping, such as screen printers and placement machines.
[0005] When using magnetic ejector pins for double-sided SMT production, abnormalities can cause the magnetic ejector pins to shift due to misalignment. Possible abnormalities include: 1. Solder paste, components, or other foreign matter on the work surface beneath the magnetic base reduces the magnetic ejector pin's magnetic attraction, causing the ejector pin to shift during the workbench's lifting motion; 2. The printed PCBA falls onto the magnetic work surface, causing the ejector pin to shift. Both of these abnormalities are common in SMT production. Pin misalignment can damage components on the bottom surface of the PCBA, a situation that has occurred in both short- and long-run production runs. Long-run production, in particular, is difficult to detect and poses significant production risks. Utility Model Content
[0006] The purpose of the utility model is to solve the problem that the supporting components in the existing SMT equipment are easy to damage the back side of the PCBA board; when using magnetic ejector pins for support, the supporting ejector pins are prone to displacement. To address this problem, a screw-fastened support mechanism for a screen printing machine is proposed.
[0007] In order to achieve the above objectives, the present invention adopts the following technical solutions:
[0008] A screen printing machine uses a screw-fastened support mechanism, including a workbench support plate, a transmission guide rail, a lifting mechanism and a PCBA. The workbench support plate is arranged below the transmission guide rail, and the lifting mechanism is installed below the work support plate. A screw locking plate is installed on the workbench support plate, and a number of locking screw holes and four connecting through holes are evenly arranged on the screw locking plate. Four supporting components are fixed to the screw locking plate by bolts. The supporting components include a support rod and a base. The base is provided with a strip hole. The bolts pass through the strip hole and the locking screw hole on the screw locking plate to adjust and fix the position of the supporting components.
[0009] As a further preference of the present invention, four screw holes are provided on the workbench support plate, the connecting through holes correspond to the screw holes, and the screw locking plate is fixed to the workbench support plate by bolts.
[0010] As a further preference of the present invention, a plurality of weight-reducing holes are evenly arranged on the screw locking plate, and each of the weight-reducing holes is distributed between four adjacent locking screw holes.
[0011] As a further preferred embodiment of the present invention, the screw locking plate is made of aluminum.
[0012] As a further preferred embodiment of the present invention, the base is made of aluminum, and the support rod is made of stainless steel.
[0013] As a further preference of the present invention, the support rod is configured as a bullet threaded polished rod.
[0014] The screen printing machine proposed in this utility model uses a screw-fastening support mechanism, which has the following beneficial effects compared with the prior art:
[0015] 1. The utility model adopts bolt fastening, which will not loosen or deflect after long-term use, thus avoiding damage to the product after deflection;
[0016] 2. The utility model adopts bolt fastening, which can improve the stability and reliability of the support rod and improve the quality of the product;
[0017] 3. By providing a base with strip holes, the position of the support plate can be adjusted according to specific needs, thereby improving the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural diagram of the utility model;
[0019] Figure 2 It is a structural diagram of the screw locking plate;
[0020] Figure 3 It is a structural diagram of the supporting components.
[0021] The meanings of the reference numerals in the figure are as follows: 11. Transmission guide rail, 12. Screw locking plate, 13. Workbench support plate, 14. Lifting mechanism, 16. PCBA, 21. Connection through hole, 22. Locking screw hole, 23. Weight reduction hole, 31. Base, 32. Support rod. DETAILED DESCRIPTION
[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] The utility model is suitable for long-term production of double-sided printed circuit boards to prevent the support rod from damaging the components on the reverse side of the PCBA.
[0024] A screen printing machine uses a screw-fastening support mechanism, including a workbench support plate 13, a transmission guide rail 11, a lifting mechanism 14 and a PCBA 16. The workbench support plate 13 is provided with four screw holes, the workbench support plate 13 is arranged below the transmission guide rail 11, the lifting mechanism 14 is installed below the work support plate, and a screw locking plate 12 is installed on the workbench support plate 13. The screw locking plate 12 is made of aluminum and is evenly provided with a number of locking screw holes 22 and four connecting through holes 21. The connecting through holes 21 correspond to the screw holes, and the screws are locked by bolts. The plate 12 is fixed on the workbench support plate 13, and a number of weight-reducing holes 23 are evenly arranged on the screw locking plate 12, and each of the weight-reducing holes 23 is distributed in the middle of four adjacent locking screw holes 22; four supporting components are fixed to the screw locking plate 12 by bolts, and the supporting components include a support rod 32 and a base 31, and the base 31 is provided with a strip hole. The bolts pass through the strip hole and the locking screw hole 22 on the screw locking plate 12 to adjust and fix the position of the supporting components. The base 31 is made of aluminum, and the support rod 32 is made of stainless steel. The support rod 32 is set as a bullet-threaded polished rod.
[0025] Working principle: Edit the screen printing program, input the length, width and thickness of PCBA16, and after the screen printer automatically adjusts the width, place the PCBA16 with components on the bottom onto the transmission guide rail 11; after feeding the board, when the PCBA16 reaches the middle above the workbench support plate 13, it stops, and while the workbench is clamped, the lifting mechanism 14 drives the workbench support plate 13 to rise; select qualified support rods 32, and select appropriate positions at the four corners below the PCBA16, and lock them with bolts; repeat the board feeding action and observe the support rods 32; if there are no components at the support point, it is considered normal; if there are components, adjust the position of the support rods 32; then continue to feed the board and observe; after confirming the position of the support rods 32, perform continuous actions, and when the PCBA16 board is automatically transmitted, take the board at the exit, start installing the steel mesh for alignment, and start production printing.
[0026] Basic principles, main features and advantages. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the scope of protection of the present invention.
Claims
1. A screen printing machine uses a screw-fastened support mechanism, comprising a workbench support plate (13), a transmission guide rail (11), a lifting mechanism (14) and a PCBA (16), wherein the workbench support plate (13) is arranged below the transmission guide rail (11), and the lifting mechanism (14) is installed below the workbench support plate, characterized in that: A screw locking plate (12) is mounted on the workbench support plate (13), and a plurality of locking screw holes (22) and four connecting through holes (21) are evenly arranged on the screw locking plate (12). Four supporting components are fixed to the screw locking plate (12) by bolts, and the supporting components include a support rod (32) and a base (31). The base (31) is provided with a strip hole, and the bolts pass through the strip hole and the locking screw hole (22) on the screw locking plate (12) to adjust and fix the position of the supporting components.
2. The screen printing machine according to claim 1 uses a screw-fastening support mechanism, characterized in that: Four screw holes are provided on the workbench support plate (13), the connecting through holes (21) correspond to the screw holes, and the screw locking plate (12) is fixed to the workbench support plate (13) by bolts.
3. The screen printing machine according to claim 1 uses a screw-fastening support mechanism, characterized in that: A plurality of weight-reducing holes (23) are evenly arranged on the screw locking plate (12), and each weight-reducing hole (23) is distributed and arranged in the middle of four adjacent locking screw holes (22).
4. The screen printing machine according to claim 1 uses a screw-fastening support mechanism, characterized in that: The screw locking plate (12) is made of aluminum.
5. The screen printing machine according to claim 1 uses a screw-fastening support mechanism, characterized in that: The base (31) is made of aluminum, and the support rod (32) is made of stainless steel.
6. The screen printing machine according to claim 1 uses a screw-fastening support mechanism, characterized in that: The support rod (32) is configured as a bullet threaded polished rod.