WO2022087978A1

WO2022087978A1 - Hot melting production equipment and process for smt laser stencil mesh frame-mesh plate

Info

Publication number: WO2022087978A1
Application number: PCT/CN2020/124919
Authority: WO
Inventors: 杨南京
Original assignee: 昆山坤和鑫电子科技有限公司
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2022-05-05

Abstract

Hot melting production equipment and process for an SMT laser stencil mesh frame-mesh plate, comprising a frame (1) and lower die sets (3), and characterized in that: guide rails (2) are connected to the middle of the frame (1) by means of bolts; side walls of the lower die sets (3) are connected to bearings (4) by means of rotating shafts; the side walls of the lower die sets (3) are slidably connected to the inner side of the guide rails (2) by means of the bearings (4); there are two lower die sets (3), and the two lower die sets (3) move in union by means of a first cylinder (6); when one lower die set (3) is working, the other lower die set (3) can be subjected to material preparation; a second cylinder (8) mounted above a backing plate (7) is used to drive an upper die (11) assembly to move; a pressing plate (9) is used for mounting the upper die (11) in cooperation; a heating plate (10) mounted between the upper die (11) and the pressing plate (9) is used for heating the upper die (11), and when the upper die (11) contacts a mesh plate assembly fixed at the upper end of the lower die set (3), heating and melting a glue stick placed at the junction of a steel plate and a mesh frame to bond the steel plate to the mesh frame. By means of the modular assemblies, the mesh plate processing efficiency can be improved, the use of glue is reduced, and the odor emitted by a hot melt glue stick is less than that emitted by a glue.

Description

A kind of hot-melt SMT laser steel mesh frame mesh plate production equipment and its production process

technical field

The invention belongs to the technical field of stencil processing, in particular to a production equipment for a hot-melt SMT laser stencil frame stencil, and also relates to a production process for a hot-melt SMT laser stencil frame stencil.

Background technique

Steel mesh, also known as SMT template, is a special mold for SMT. Its main function is to aid in the deposition of solder paste; the purpose is to transfer the exact amount of solder paste to the exact location on the empty PCB. Steel mesh was originally made of wire mesh, so it was called stencil at that time. It started with nylon (polyester) mesh. Later, due to the durability, there were barbed wire mesh, copper wire mesh, and finally stainless steel mesh. With the development of SMT, the requirements for stencils have increased, and steel meshes have been produced. Affected by the cost of materials and the difficulty of production, the original steel mesh was made of iron/copper plate, but also because it was easy to rust, stainless steel mesh replaced them, which is the current steel mesh.

The existing steel mesh has a long processing time and requires various materials and types. The main material glue does not meet the current environmental protection requirements for inspection, and the terminal use is easy to degumming, and the cost is high. The time is long, and it takes more than 30 minutes to process a finished product in the prior art, which is easy to be degummed. In the end use process of the prior art, the degumming often leads to the direct scrapping of the product.

To this end, we propose a hot-melt SMT laser steel mesh frame mesh production equipment to solve the problems existing in the prior art. , the holes of the steel plate correspond to the protrusions of the rubber strip, and the rubber strip can be snapped on the steel plate), the upper die is provided with a heating plate, which is pressed down by the cylinder, and the upper film seat is heated by the heating plate to heat and melt the rubber strip, and the rubber strip is melted by melting. The steel plate is bonded to the screen frame; there are two sets of lower die sets, one set of which is working, the other set can be used for material preparation, and the two sets of lower die sets are linked by air cylinders, combined with a heated upper die seat and a linked lower die The seat assembly is used to improve the processing efficiency of steel mesh and reduce the use of glue.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a hot-melt type SMT laser stencil frame mesh panel production equipment, which combines the use of a heated upper die base and a linked lower die base assembly, improves stencil processing efficiency, and reduces the use of glue, Solving the high cost and long time period for terminal processing plants and users mainly solves environmental protection problems, which can avoid enterprises from using glue strictly controlled by the national environmental protection department, and improve the service life of products, saving costs for enterprises.

In order to achieve the above object, the present invention adopts the following technical solutions: a hot-melt SMT laser steel mesh frame mesh panel production equipment, comprising a frame and a lower module, the middle of the frame is connected with a guide rail by bolts, and the lower module is The side wall is connected with a bearing through the rotating shaft, and the side wall of the lower module is slidably connected to the inner side of the guide rail through the bearing. The lower end of the frame is connected with a first cylinder by bolts, the main shaft end of the first cylinder is connected with one end of the lower module by bolts, the upper end of the frame is connected with a backing plate by bolts, and a second cylinder is connected in the middle of the backing plate by bolts, The main shaft end of the second cylinder is connected with a pressing plate located below the backing plate by bolts, the lower end of the pressing plate is connected with a heating plate by bolts, and the bottom of the heating plate is connected with an upper die by bolts;

The lower die set comprises a bottom plate, a lower die, a heat insulation board and a bakelite board, the end of the bottom board is connected to the connecting plate by bolts, the bearing is installed on the side wall of the bottom plate, and the bakelite board is connected to the upper end of the bottom plate by bolts, The lower die is connected to the upper end of the heat insulating plate by bolts, the inner side of the lower die is connected to a die frame by bolts, the heat insulating plate is connected to the middle of the die frame by bolts, and the inner side of the upper die is bolted to the same specification. formwork and heat shield structure.

Preferably, an organ plate is connected in the middle of the frame through bolts, one end of the organ plate is connected to the bottom plate through bolts, and the other end of the organ plate is connected to the side of the frame through bolts.

Preferably, a through-slot structure matching with the first heat insulating plate is formed in the middle of the bottom plate, and the length of the first heat insulating plate is greater than the length of the through-slot.

Preferably, the upper end of the frame is connected with a cover plate through bolts, the cover plate is located outside the second cylinder, and the inner side wall of the cover plate is connected with a solenoid valve through bolts, and the solenoid valve air outlet is connected to the second cylinder through an air pipe The air inlet is communicated.

Preferably, a temperature control switch and a switch are embedded in the front side wall of the cover plate, the temperature control switch is electrically connected to the heating plate through a wire, and the switch is electrically connected to the solenoid valve through a wire.

Preferably, an air pressure valve is connected to the other side of the front end of the cover plate through bolts, and the air pressure valve is communicated with the air inlet of the solenoid valve through an air pipe.

Preferably, the upper end of the pressing plate is connected with a guide column through bolts, and the upper end of the guide column is connected to the backing plate through.

Preferably, the lower end of the frame is connected with a limit plate located on the side of the first cylinder by bolts, and the upper end of the limit plate corresponds to the position of the bottom plate.

The invention also relates to a production process of a hot-melt SMT laser steel mesh frame mesh plate:

Step 1: Snap the rubber strip on the steel plate, and inspect the rubber strip to ensure that the rubber strip is installed in the hole of the steel plate flat, without warping or leakage, and clean the surface of the lower module to avoid affecting the steel plate. Assemble the net, then place the net frame with the glue strips installed on the lower die, ventilate the first cylinder through the solenoid valve assembly, and drive the lower module to move through the ventilation of the first air cylinder, and move the net frame to the lower part of the upper die assembly;

Step 2: Clean the lower surface of the upper die assembly to prevent residual impurities from affecting the hot melt, turn on the power of the hot melt equipment, adjust the working temperature parameters of the temperature control switch, and then turn on the power of the electric heating plate, and perform the operation on the upper die. Heating, when the upper mold is heated to the set temperature, the temperature control switch will automatically suspend the heating work;

Step 3: When the temperature reaches the set temperature, press the trigger switch to turn on the power supply of the solenoid valve, so as to connect the air supply pipeline connected to the air pressure valve to supply air to the second cylinder. The air pressure valve is used to adjust the air supply intensity and change the The propulsion efficiency of the second cylinder, in the air supply state, the second cylinder will drive the pressure plate installed with the upper die to press down until it is in close contact with the screen frame placed above the lower die;

Step 4: When step 3 is completed, at this time, because the upper die assembly is heated by the heating plate, the heat is transferred to the screen frame on the lower die through the upper die, and the rubber strip at the contact position between the steel plate and the wire mesh is heated. After a certain time of hot melting, the switch can be manually turned off, or a time relay component can be added to automatically control the pressure holding time to ensure the hot melt forming degree of the adhesive strip;

Step 5: When one set of lower modules is hot-melted, new screen frame parts can be placed on another set of lower modules, waiting for hot-melting treatment, and when switching the hot-melting lower modules, place the hot-melted steel mesh The finished product is taken out and transferred to the subsequent processing station.

The technical effects and advantages of the present invention: a kind of hot-melt type SMT laser steel mesh frame mesh panel production equipment and its production process proposed by the present invention have the following advantages compared with the prior art:

The invention discloses that a guide rail is installed on the upper end of the frame, which is used for cooperating with installing a lower module with a bearing. The lower module is provided with two groups, and the two groups of lower modules are linked by a first cylinder. For material preparation, the second cylinder installed at the upper end of the backing plate is used to drive the components of the upper die to move, the pressing plate is used to fit the upper die, the heating plate installed between the upper die and the pressing plate is used to heat the upper die, and the upper die is provided with a heating The upper die is pressed down by the air cylinder through the second air cylinder, and when it contacts the mesh panel component fixed at the upper end of the lower die set, the rubber strip placed at the junction of the steel plate and the mesh frame will be heated and melted, and the steel plate and the mesh frame will be bonded. ;Modular components can improve the processing efficiency of stencils, avoid the use of glue strictly controlled by the national environmental protection department, and improve the service life of products, saving costs for enterprises. The bonding strength of the stencil and the tension of the steel plate are enhanced at the same time.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the front structure schematic diagram of the present invention;

Fig. 3 is the internal structure schematic diagram of the present invention;

FIG. 4 is a schematic structural diagram of a lower module of the present invention.

In the picture: 1 frame, 2 guide rail, 3 lower module, 4 bearing, 5 connecting plate, 6 first cylinder, 7 backing plate, 8 second cylinder, 9 pressing plate, 10 heating plate, 11 upper die, 12 bottom plate, 13 Lower mold, 14 heat insulation board, 15 bakelite board, 16 mold frame, 17 organ board, 18 cover board, 19 solenoid valve, 20 temperature control switch, 21 switch, 22 air pressure valve, 23 guide column, 24 limit plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention, and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention provides a hot-melt SMT laser stencil frame mesh panel production equipment as shown in Figures 1-4, including a frame 1 and a lower module 3, the frame 1 is connected with a guide rail 2 through bolts, and the The side wall of the lower module 3 is connected with a bearing 4 through a rotating shaft, and the side wall of the lower module 3 is slidably connected to the inner side of the guide rail 2 through the bearing 4. The number of the lower module 3 is two groups, and the two groups of the lower modules are 3 are connected by connecting plates 5, the lower end of the frame 1 is connected with a first cylinder 6 by bolts, the main shaft end of the first cylinder 6 is connected with one end of the lower module 3 by bolts, and the upper end of the frame 1 is connected by bolts with a Backing plate 7, the middle of the backing plate 7 is connected with a second cylinder 8 by bolts, the main shaft end of the second air cylinder 8 is connected with a pressure plate 9 located below the backing plate 7 by bolts, and the lower end of the pressure plate 9 is connected by bolts with a heating plate 9. Plate 10, the bottom of the heating plate 10 is connected with an upper die 11 by bolts, and a guide rail 2 is installed on the upper end of the frame 1, which is used to cooperate with the installation of the lower die set 3 with the bearing 4. The modules are linked by the first air cylinder 6. When one group is working, the other group can be prepared. The second air cylinder 8 installed on the upper end of the backing plate 7 is used to drive the components of the upper mold 11 to move, and the pressure plate 9 is used to cooperate with the installation of the upper mold 11. , the heating plate 10 installed between the upper mold 11 and the pressing plate 9 is used to heat the upper mold 11, the upper mold is provided with a heating plate, and the upper mold 11 is driven downward by the cylinder through the second cylinder 8, and contacts the lower module 3 When the screen panel assembly is fixed at the upper end, the rubber strip placed at the junction of the steel plate and the screen frame will be heated and melted, and the steel plate and the screen frame will be bonded;

The lower die 3 includes a bottom plate 12, a lower die 13, a heat insulating plate 14 and a bakelite board 15. The end of the bottom plate 12 is connected to the connecting plate 5 by bolts, and the bearing 4 is installed on the side wall of the bottom plate 12. The bakelite board 15 is connected to the upper end of the bottom plate 12 by bolts, the lower mold 13 is connected to the upper end of the heat insulation plate 14 by bolts, the inner side of the lower mold 13 is connected to the mold frame 16 by bolts, and the heat insulation plate 14 is connected to the upper end of the heat insulation plate 14 by bolts. In the middle position of the mold frame 16, the inner side of the upper mold 11 is connected with the mold frame 16 and the heat insulation plate 14 of the same specification by bolts. Place the steel plate, rubber strip, and screen frame on the lower die, (there are holes on the edge of the steel plate, the steel plate holes correspond to the protrusions of the rubber strip, and the rubber strip can be buckled on the steel plate), and the bottom plate 12, the lower die 13, the heat insulation board 14 and the The lower module 3 composed of the bakelite board 15 is used to support the mesh board, the heat insulation board 14 is used for heat dissipation, and the heat dissipation efficiency of the hot melt adhesive strip is improved, and the mold frame 16 is used to match the part where the strip is installed on the mesh board. To support and ensure the molding effect, the bakelite board 15 is used for supporting the lower mold 13 , the heat insulation board 14 and the mold frame 16 .

Preferably, an organ plate 17 is connected to the middle of the frame 1 by bolts, one end of the organ plate 17 is connected to the bottom plate 12 by bolts, and the other end of the organ plate 17 is connected to the side of the frame 1 by bolts, in the middle of the frame 1. The organ board 17 is installed to match the part where the end face of the closed frame 1 is connected to the lower module 3 without affecting the movement of the lower module 3 to reduce dust falling into the equipment.

Preferably, the bottom plate 12 is provided with a through-slot structure matching the first heat-insulating plate 14, and the length of the first heat-insulating plate 14 is greater than the length of the through-slot, and the through-slot structure is convenient for the first heat-insulating plate. 14. Heat dissipation to ensure stable molding of the stencil.

Preferably, the upper end of the frame 1 is connected with a cover plate 18 through bolts, the cover plate 18 is located outside the second cylinder 8, and the inner side wall of the cover plate 18 is connected with a solenoid valve 19 through bolts, and the solenoid valve 19 The air outlet is communicated with the air inlet of the second cylinder 8 through an air pipe. A temperature control switch 20 and a switch 21 are embedded in the front side wall of the cover plate 18. The temperature control switch 20 is electrically connected to the heating plate 10 through wires. The switch 21 is electrically connected to the solenoid valve 19 through a wire, and the other side of the front end of the cover plate 18 is connected with an air pressure valve 22 through bolts. The cover plate 18 is used to protect the second cylinder 8. At the same time, a solenoid valve 19 is installed on the side wall of the cover plate 18 to control the air supply to the second cylinder 8. The temperature control switch 20 is used to adjust the working temperature of the heating plate 10. The air pressure valve 22 is used to adjust the intake air pressure of the device.

Preferably, the upper end of the pressure plate 9 is connected with a guide column 23 by bolts, and the upper end of the guide column 23 is connected to the backing plate 7 through the upper end. The moving direction of the pressing plate 9 is guided and limited to maintain the pressing plate 9 to move smoothly in the vertical direction.

Preferably, the lower end of the frame 1 is connected with a limiting plate 24 located on the side of the first cylinder 6 through bolts, and the upper end of the limiting plate 24 corresponds to the position of the bottom plate 12 .

Structural principle: A guide rail 2 is installed on the upper end of the frame 1, which is used to cooperate with the installation of the lower module 3 with the bearing 4. The lower module 3 is provided with two groups, and the two groups of lower modules are linked by the first cylinder 6. , another set of materials can be prepared, the second cylinder 8 installed on the upper end of the backing plate 7 is used to drive the components of the upper die 11 to move, the pressure plate 9 is used to cooperate with the installation of the upper die 11, and the heating plate 10 installed between the upper die 11 and the pressure plate 9 It is used to heat the upper die 11. The upper die is provided with a heating plate, and the upper die 11 is driven down by the air cylinder through the second air cylinder 8. The glue strip placed at the junction of the frame is heated and melted, and the steel plate is bonded to the screen frame; On the steel plate), the lower module 3 composed of the bottom plate 12, the lower mould 13, the heat insulation plate 14 and the bakelite 15 is used to support the mesh plate, and the heat insulation plate 14 is used for heat dissipation, improving the position of the hot melt adhesive strip. The mold frame 16 is used to support the parts where the rubber strips are installed on the screen plate to ensure the molding effect, and the bakelite 15 is used to support the lower mold 13 and the heat insulation board 14 and the mold frame 16 .

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments can be modified, or some technical features thereof can be equivalently replaced, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included. within the protection scope of the present invention.

Claims

A hot-melt type SMT laser steel mesh frame mesh panel production equipment, comprising a frame (1) and a lower module (3), characterized in that a guide rail (2) is connected in the middle of the frame (1) by bolts, and the The side wall of the lower module (3) is connected with a bearing (4) through a rotating shaft, and the side wall of the lower module (3) is slidably connected to the inner side of the guide rail (2) through the bearing (4). The number of the lower module (3) There are two groups, and the lower modules (3) of the two groups are connected by connecting plates (5). The lower end of the frame (1) is connected with a first cylinder (6) by bolts. The first cylinder (6) ) The main shaft end is connected with one end of the lower module (3) by bolts, the upper end of the frame (1) is connected with a backing plate (7) by bolts, and a second cylinder (8) is connected in the middle of the backing plate (7) by bolts , the main shaft end of the second cylinder (8) is connected with a pressure plate (9) located below the backing plate (7) through bolts, and the lower end of the pressure plate (9) is connected with a heating plate (10) through bolts, and the heating plate ( 10) The bottom is connected with an upper die (11) by bolts;

The lower module (3) includes a bottom plate (12), a lower die (13), a heat insulation board (14) and a bakelite (15), and the end of the bottom plate (12) is connected to the connecting plate (5) by bolts , the bearing (4) is installed on the side wall of the bottom plate (12), the bakelite board (15) is connected to the upper end of the bottom plate (12) by bolts, and the lower die (13) is connected to the heat insulation plate (14) by bolts On the upper end, a die frame (16) is connected to the inner side of the lower die (13) by bolts, the heat insulating plate (14) is connected to the middle position of the die frame (16) by bolts, and the inner side of the upper die (11) is bolted to A mold frame (16) and a heat insulation board (14) structure of the same specification are connected.
A hot-melt type SMT laser steel mesh frame mesh plate production equipment according to claim 1, characterized in that: an organ plate (17) is connected in the middle of the frame (1) by bolts, and the organ plate (17) One end is connected to the bottom plate (12) by bolts, and the other end of the organ plate (17) is connected to the side of the frame (1) by bolts.
A hot-melt type SMT laser stencil frame mesh panel production equipment according to claim 1, characterized in that: the bottom plate (12) is provided with a through-slot structure matching the first heat insulation panel (14) in the middle , and the length of the first heat insulation board (14) is greater than the length of the through groove.
A hot-melt type SMT laser steel mesh frame mesh panel production equipment according to claim 1, characterized in that: the upper end of the frame (1) is connected with a cover plate (18) by bolts, and the cover plate (18) The solenoid valve (19) is located outside the second cylinder (8), and the inner side wall of the cover plate (18) is connected with a solenoid valve (19) through bolts. Connected.
A hot-melt SMT laser stencil frame mesh panel production equipment according to claim 4, characterized in that: a temperature control switch (20) and a switch (21) are embedded in the front end side wall of the cover panel (18), The temperature control switch (20) is electrically connected with the heating plate (10) through wires, and the switch (21) is electrically connected with the solenoid valve (19) through wires.
A hot-melt type SMT laser stencil frame mesh plate production equipment according to claim 4, characterized in that: the other side of the front end of the cover plate (18) is connected with an air pressure valve (22) by bolts, and the air pressure The valve (22) communicates with the air inlet of the solenoid valve (19) through the air pipe.
A hot-melt type SMT laser stencil frame mesh panel production equipment according to claim 1, characterized in that: the upper end of the pressing plate (9) is connected with a guide post (23) by bolts, and the guide post (23) The upper end is connected to the backing plate (7) through.
A hot-melt type SMT laser stencil frame mesh panel production equipment according to claim 1, characterized in that: the lower end of the frame (1) is connected with a limit plate located on the side of the first cylinder (6) by bolts (24), the upper end of the limiting plate (24) corresponds to the position of the bottom plate (12).
A process for producing hot-melt SMT laser stencil frame stencil according to claim 1, characterized in that:

Step 1: Snap the rubber strip on the steel plate, and inspect the rubber strip to ensure that the rubber strip is installed in the hole of the steel plate flat, without warping or leakage, and clean the surface of the lower module to avoid affecting the steel plate. Assemble the net, then place the net frame with the glue strips installed on the lower die, ventilate the first cylinder through the solenoid valve assembly, and drive the lower module to move through the ventilation of the first air cylinder, and move the net frame to the lower part of the upper die assembly;

Step 2: Clean the lower surface of the upper die assembly to prevent residual impurities from affecting the hot melt, turn on the power of the hot melt equipment, adjust the working temperature parameters of the temperature control switch, and then turn on the power of the electric heating plate, and perform the operation on the upper die. Heating, when the upper mold is heated to the set temperature, the temperature control switch will automatically suspend the heating work;

Step 3: When the temperature reaches the set temperature, press the trigger switch to turn on the power supply of the solenoid valve, so as to connect the air supply pipeline connected to the air pressure valve to supply air to the second cylinder. The air pressure valve is used to adjust the air supply intensity and change the The propulsion efficiency of the second cylinder, in the air supply state, the second cylinder will drive the pressure plate installed with the upper die to press down until it is in close contact with the screen frame placed above the lower die;

Step 4: When step 3 is completed, at this time, because the upper die assembly is heated by the heating plate, the heat is transferred to the screen frame on the lower die through the upper die, and the rubber strip at the contact position between the steel plate and the wire mesh is heated. After a certain time of hot melting, the switch can be manually turned off, or a time relay component can be added to automatically control the pressure holding time to ensure the hot melt forming degree of the adhesive strip;

Step 5: When one set of lower modules is hot-melted, new screen frame parts can be placed on another set of lower modules, waiting for hot-melting treatment, and when switching the hot-melting lower modules, place the hot-melted steel mesh The finished product is taken out and transferred to the subsequent processing station.