Disclosure of Invention
In order to achieve the purpose of reducing the solidification condition of the coating in the filling process, the invention adopts the following technical scheme:
the invention provides a polyurethane resin coating processing technology, wherein the color matching and filling steps in the technology are carried out by a coating filling device, and the technology comprises the following steps:
Step one: adding the paint raw materials into a reaction kettle to sequentially perform alcoholysis reaction and polycondensation reaction to obtain a semi-finished paint;
The obtained paint semi-finished product is subjected to sealing filling treatment by a paint filling device, and is added into a paint sub-barrel after transition of a filling stirring tank;
Step two: pumping the semi-finished paint into a filling stirring tank, adding a coloring material and a drier, and fully mixing the coloring material and the drier with the semi-finished paint to obtain a paint finished product;
step three: the communicating pipe fitting on the filling stirring tank is controlled to be inserted into the flow channel on the paint sub-barrel;
step four: pumping the paint finished product in the stirring tank into a paint separating barrel;
step five: after filling, the communicating pipe fitting is pulled out from the flow channel, the flow channel is plugged, and the end opening of the communicating pipe fitting is closed.
The structure of the paint filling device used in the polyurethane resin paint processing technology comprises a seat, a paint bucket positioning frame and a stirring arm;
a paint bucket positioning frame and a bracket are arranged on the base, a filling stirring tank is arranged on the bracket, a paint sub-bucket is supported on the paint bucket positioning frame, and a stirring arm is rotationally connected to the upper side of the paint sub-bucket;
A cover is arranged on the paint sub-barrel;
The top of the cover is provided with a rim, the lower side of the rim is provided with a strip-shaped groove, the outer side wall of the lower end of the cover is provided with a filling hole extending obliquely, the paint sub-barrel is provided with a matching hole, and the filling hole is communicated with the matching hole;
The filling agitator tank upside is provided with the filling pipe, and the lower extreme of filling agitator tank lateral part is provided with the intercommunication pipe fitting, installs the pump on the intercommunication pipe fitting, and the extending direction of intercommunication pipe fitting can be corresponding with the axis of the runner that filling hole and mating hole formed to make the intercommunication pipe fitting can insert in the runner that filling hole and mating hole formed.
The invention has the beneficial effects that:
The filling hole and the matching hole with smaller size are communicated with the communicating pipe fitting, and the closure of the flow passage and the communicating pipe fitting after filling is controlled, so that the contact degree of air and paint is reduced, and the purpose of preventing the paint from being dried prematurely is realized.
Detailed Description
Specific embodiments of the present invention are described below.
The polyurethane resin coating processing technology can process the easy-to-dry coating of the urethane oil; since the urethane oil does not contain residual isocyanate groups, the processing and formulation of the paint can be carried out using conventional dry pigments and conventional methods.
Wherein in the step of transesterification for the coating: adding drying oil, polyol and catalyst into a reaction kettle, introducing nitrogen, heating and stirring for 1-2 h at 230-250 ℃ to carry out transesterification reaction, and after alcoholysis products meet indexes, analyzing hydroxyl value and acid value and calculating TDI addition according to analysis results. Then adding a solvent for azeotropic dehydration, and cooling the reaction solution to 50 ℃;
Wherein in the step of polycondensation reaction for the coating: adding TDI into alcoholysis product at 50 deg.C, at this time, the reaction temperature is kept at 60-65 deg.C, after TDI is added, stirring for half an hour, raising the temperature to 80-90 deg.C, adding catalyst to make isocyanate fully react and NCO group completely disappear. When the temperature is cooled to 50-55 ℃, a small amount of methanol or ethanol can be added as a reaction terminator to eliminate residual NCO. In addition, a certain amount of solvent is added, and then an antiskinning agent and a drier are added;
the paint semi-finished product is obtained at this time, then the paint semi-finished product is subjected to sealing and filling treatment by a paint filling device, and is added into a paint sub-barrel 21 after being transited by a filling stirring tank 51;
referring to fig. 2 to 5 and fig. 10 to 11, specific component structures of the paint filling apparatus used in the color matching and filling steps in the polyurethane resin paint processing process of the present application will be described;
When the paint semi-finished product is filled in the stirring tank 51, the paint semi-finished product is mixed with the coloring material and the drier to prepare a paint finished product;
the base 11 is arranged on the ground, the base 11 is provided with a paint bucket positioning frame 13 and a bracket, the bracket is provided with a filling stirring tank 51, and the paint bucket positioning frame 13 is provided with a paint sub-bucket 21;
A cover 25 is arranged on the paint sub-barrel 21, and a capacity disc 23 is arranged inside the paint sub-barrel 21 in a sliding manner;
Openings are formed in the upper side and the lower side of the paint sub-barrel 21, limiting edges are arranged at the two opening positions, and limiting treatment is carried out on the capacity disc 23 by the aid of the limiting edges;
the capacity disc 23 is placed into the paint sub-barrel 21 before the paint sub-barrel 21 bends the limit edge;
The outer side wall of the capacity disc 23 is closely connected with the top of the inner wall of the paint separating barrel 21 in a sealing way;
the top of the capacity tray 23 can be attached to the underside of the lid 25 to reduce air pockets of the paint dispensing cartridge 21 prior to filling the paint;
The top of the cover 25 is provided with a rim, the lower side of the rim is provided with a strip-shaped groove 28, the outer side wall of the lower end of the cover 25 is provided with a filling hole 26 extending obliquely, the paint sub-barrel 21 is provided with a matching hole 27, the filling hole 26 is communicated with the matching hole 27, and the section of the end part of the communicating part of the filling hole 26 and the matching hole 27 is overlapped;
a filling pipe is arranged on the upper side of the filling stirring tank 51, a communicating pipe fitting is arranged at the lower end of the side part of the filling stirring tank 51, a pump is arranged on the communicating pipe fitting, and the communicating pipe fitting can be inserted into a flow channel formed by the filling hole 26 and the matching hole 27;
The material enters the filling agitator tank 51 through a filling pipe.
Referring to fig. 2, 10 and 12, an embodiment of the present application in which a paint semifinished product and a color mixture in a tank 51 are mixed and stirred by a stirring arm 61 in a color matching step in a polyurethane resin paint processing process is described;
the filling stirring tank 51 is rotatably connected with a stirring arm 61, the filling stirring tank 51 is also provided with a rotation driver, and an output shaft of the rotation driver is connected with the stirring arm 61 through a coupling;
starting a rotary driver, controlling the stirring arm 61 to stir the paint in the filling stirring tank 51, wherein the rotary driver can be a stepping motor or a servo motor;
The stirring arm 61 is provided with a valve plate 62; the rotary driver is started, so that the stirring arm 61 drives the valve plate 62 to plug the inner side position of the filling stirring tank 51 where the discharging pipe 52 is communicated, and the sealing control effect on the end part of the elastic pipe 54 is further improved.
Referring to fig. 2 to 3 and fig. 6 to 8, an embodiment of the present application for preventing premature drying of a paint by setting the structure of a paint dispensing barrel in a filling step in a process of processing a polyurethane resin paint will be described;
The cover 25 is clamped on the upper opening of the paint sub-barrel 21 through interference fit, under the condition that no external force is applied, the lower end of the cover 25 can be attached to the lower side face of the limit edge of the upper opening of the paint sub-barrel 21, and when the upper side of the capacity disc 23 is abutted to the lower end of the cover 25, the capacity disc is abutted to the lower side face of the limit edge, and is matched with the lower side face of the limit edge, so that the air survival of the paint sub-barrel 21 before paint filling is further reduced;
at this time, the inside and the outside of the paint separating barrel 21 are communicated only through the filling hole 26 and the matching hole 27;
the cover 25 is clamped on the upper opening of the paint sub-barrel 21 through interference fit, and under the condition of applying external force, the cover 25 can be embedded into the upper opening of the paint sub-barrel 21, and at the moment, the lower side surface of the top edge of the cover 25 is abutted with the upper side surface of the paint sub-barrel 21;
And a strip-shaped groove 28 arranged at the lower side of the top edge of the cover 25 and used for prying the cover 25 open so as to use the paint in the paint sub-barrel 21.
The lower side of the capacity disc 23 is provided with an adjusting frame 24, the adjusting frame 24 penetrates through the lower opening of the paint sub-barrel 21, the limiting support and the positioning of the adjusting frame 24 are realized through a paint filling device, the position control of the capacity disc 23 is realized, the paint sealing effect in the paint sub-barrel 21 is further maintained, the air survival after paint filling is reduced, and in addition, the required products with different capacities can be filled.
Referring to fig. 2 to 3, 6 to 8 and 10 to 11, a specific embodiment of the present application for filling a paint through communication between a paint partial tank and a communication pipe in a filling step in a polyurethane resin paint processing process will be described;
the communicating pipe fitting comprises a discharging pipe 52, a sliding pipe 53 and an elastic pipe 54;
The lower end of the side part of the filling stirring tank 51 is communicated with and fixedly connected with a discharging pipe 52, a sliding pipe 53 is arranged in sliding connection with the discharging pipe 52, a first telescopic driver for driving the sliding pipe 53 to slide is arranged on the discharging pipe 52, and the movable end of the first telescopic driver is fixedly connected with the sliding pipe 53;
the discharging pipe 52 is provided with a pump, and the position of the pump is outside the sliding range of the sliding pipe 53;
The end part of the sliding pipe 53 is fixedly connected and communicated with an elastic pipe 54, the groove plates on two sides of the sliding pipe 53 are respectively and slidably connected with a sealing extrusion plate 55, the two sealing extrusion plates 55 are symmetrically arranged, and the sealing extrusion plates 55 can be inserted into the flow passage formed by the filling hole 26 and the matching hole 27 together with the elastic pipe 54, so that the limiting effect on the elastic pipe 54 is improved;
by starting the first telescopic driver, the sliding pipe 53 drives the elastic pipe 54 to be inserted into the flow channel formed by the filling hole 26 and the matching hole 27; the telescopic driver can be an electric telescopic rod or a hydraulic cylinder;
the groove plates are provided with second telescopic drivers for driving the seal extrusion plates 55 to slide, the movable ends of the second telescopic drivers are fixedly connected with the seal extrusion plates 55, and the two seal extrusion plates 55 extrude the end parts of the elastic tubes 54 by starting the second telescopic drivers, so that the sealing control effect on the end parts of the elastic tubes 54 is improved; the telescopic driver can be an electric telescopic rod or a hydraulic cylinder;
the filling hole 26 is offset at the edge of the bottom of the cover 25 by a distance not penetrating the bottom edge of the cover 25, so that the filling hole 26 has a complete annular cross section in the cover 25, and finally an annular inner wall is formed in the cover 25;
When the sealing extrusion plate 55 can be inserted into the flow channel formed by the filling hole 26 and the matching hole 27 together with the elastic pipe 54, the filling hole 26 and the sealing extrusion plate 55 are subjected to bidirectional limiting, so that the cover 25 is prevented from falling off, and the filling effect of the coating is improved;
further, an arc-shaped positioning sleeve 56 is installed on the sealing extrusion plate 55, and the limiting effect on the elastic tube 54 is further improved by utilizing the arc-shaped positioning sleeve 56.
Referring to fig. 2 to 3, 6 to 8 and 10 to 11, a specific embodiment of the present application in which the paint sub-tank 21 is sealed after filling by communication between the paint sub-tank and the communicating pipe in the filling step in the process of the polyurethane resin paint is described;
the cover 25 is clamped on the upper opening of the paint sub-barrel 21 through interference fit, the lower end of the cover 25 can be attached to the lower side surface of the limit edge of the upper opening of the paint sub-barrel 21 under the condition that no external force is applied, and the filling hole 26 and the matching hole 27 are communicated;
filling the paint through the communicating pipe fitting, so that the paint enters the paint sub-barrel 21 through a flow channel formed by the filling hole 26 and the matching hole 27;
After the filling operation is completed, vertical extrusion force is applied to the cover 25, so that the cover 25 is embedded into an upper opening of the paint sub-barrel 21, the filling holes 26 are staggered from the matching holes 27, the plugging of the flow is completed, and at the moment, the upper side of the matching holes 27 along the top of the cover 25 is covered, so that sealing treatment after filling is realized.
Referring to fig. 2 to 7, an embodiment of the present application for positioning and conveying paint sub-tanks 21 by a paint tank positioning frame 13 in a filling step in a polyurethane resin paint processing process will be described;
a plurality of positioning arms 14 are fixedly connected to the two paint bucket positioning frames 13, a plurality of groups of positioning grooves 22 are formed in the side parts of the paint sub-barrels 21, and the paint sub-barrels 21 can be easily held by hands through the positioning grooves 22;
Further, the positioning groove 22 is matched with the positioning arm 14 in a clamping way, so that the supporting operation of the paint separating barrel 21 is completed;
In this process, the paint sub-barrels 21 are inserted from the end portions between the positioning arms 14 on both sides, and are manually slidably conveyed between the positioning arms 14 on both sides, so that the paint sub-barrels 21 pass through the communicating pipe in sequence, and then the paint sub-barrels 21 are filled with paint by the communicating pipe.
Referring to fig. 2 to 5, a specific embodiment of the present application by controlling the height position of the adjusting frame 24 in the filling step in the urethane resin coating processing process will be described;
A capacity disc 23 is vertically and slidingly connected in the paint sub-barrel 21, an adjusting frame 24 is connected to the bottom of the capacity disc 23, the adjusting frame 24 is limited and supported by two brackets 16 on the seat 11, and the upper side of the capacity disc 23 is abutted against the lower side of a cover 25 by utilizing the position adjustment of the adjusting frame 24, so that no air exists in the paint sub-barrel 21 in an initial state;
The adjusting frame 24 is clamped between the two brackets 16, and the side parts of the adjusting frame 24 are respectively in fit connection with the inner side surfaces of the two brackets 16, so that an initial positioning effect is realized;
the bottom slot of the capacity disc 23 is connected with the adjusting frame 24 through interference fit clamping connection, so that locking connection of the bottom slot and the adjusting frame is realized.
The paint bucket locating rack 13 is fixedly connected with an L-shaped arm 15, the L-shaped arm 15 is connected with a movable bracket 17 in a sliding manner, the movable bracket 17 is movably arranged between the two brackets 16, the upper side face of the movable bracket 17 and the upper side faces of the two brackets 16 can be connected in a fitting manner, a third telescopic driver is arranged on the L-shaped arm 15, and the movable end of the third telescopic driver is fixedly connected with the movable bracket 17.
When the paint sub-barrel 21 moves to the position of communicating with the pipe fitting, the upper side surfaces of the movable brackets 17 and the upper side surfaces of the two brackets 16 keep fit;
When filling the paint through the communicating pipe fitting, the third telescopic driver is started to drive the movable bracket 17 to lift, so that the adjusting frame 24 moves downwards in the paint filling process, the paint sealing effect in the paint sub-barrel 21 is further maintained through the position control of the capacity disc 23, the air survival after the paint filling is reduced, and in addition, the filling can be carried out for the required products with different capacities.
Referring to fig. 2 to 5 and 9, a specific embodiment of the present application for locating the positions of the plurality of paint partial tanks 21 in the filling step in the urethane resin paint processing process will be described;
The upper side of the seat 11 is fixedly connected with a track seat 12, a sliding frame 41 is connected in a sliding manner in the track seat 12, a sub-packaging barrel positioning arm 42 is connected on the sliding frame 41 in a sliding manner, the sub-packaging barrel positioning arm 42 is formed by connecting a plurality of U-shaped arms through long plates, a fourth telescopic driver is installed on the track seat 12, the movable end of the fourth telescopic driver is fixedly connected with the sliding frame 41, a fifth telescopic driver is installed on the sliding frame 41, and the movable end of the fifth telescopic driver is fixedly connected with the sub-packaging barrel positioning arm 42; the telescopic driver can be an electric telescopic rod or a hydraulic cylinder;
by starting the fourth telescopic driver and the fifth telescopic driver, the split charging barrel positioning arm 42 can position and move the plurality of paint split charging barrels 21 on the two paint barrel positioning frames 13 in the horizontal shaking process;
the two ends of the inner side of the U-shaped arm are connected with the side part of the paint sub-barrel 21 in a bonding way;
The paint bucket positioning frame 13 is fixedly connected with a height limiting seat 31, and the height limiting seat 31 is provided with a pressing arm 32;
the pressing arm 32 on the height limiting seat 31 is utilized to automatically press down the cover 25 when the filled paint sub-barrel 21 is driven by the U-shaped arm to move;
The cover 25 is inserted into the opening of the paint dispensing barrel 21, the filling holes 26 are staggered from the matching holes 27, the flow is blocked, and the upper side of the matching holes 27 is covered by the edge of the top of the cover 25.