CN200995125Y - Double-component adhesive washer with metering and mixing functions for non-solvent composite apparatus - Google Patents

Abstract

A measuring, mixing and washing device for double-troop bond of a solventless laminator. The utility model is characterized in that the device has two sets of measuring devices (1, 2), a mixing device (3) connected with the two sets of measuring device, and a washing control system. The measuring device (1, 2) is connected with the mixing device (3) through a pipeline, and the washing control system is connected with the mixing device (3) through a pipeline.

Description

Two-component adhesive metering, mixing and cleaning device for solvent-free laminating machine

Technical field

The utility model relates to a two-component adhesive measuring, mixing and cleaning device.

Background technique

Due to the characteristics of low packaging cost, strong plasticity, high comprehensive performance, and small packaging space, flexible packaging occupies an important position and proportion in different packaging methods. Most of the flexible packaging materials are produced by composite technology. Composite technology is to combine two or more materials with different characteristics to form a better packaging material technology that learns from each other in terms of performance. Lamination is divided into five types: dry lamination, solvent-free lamination, hot-melt lamination, water-soluble lamination, and extrusion lamination.

Most of the adhesives used in the domestic food packaging composite film industry are solvent-based, so there are a lot of solvents that pollute the environment and safety issues, and consume a lot of energy. According to estimates, the food packaging industry alone emits more than 400,000 tons of organic solvents into the atmosphere every year. The solvent emitted by solvent-based adhesives during the production process will not only pollute the air, but also directly endanger the health of the operators. In the end, there will still be a small part of the solvent that cannot be eliminated and will remain in the food packaging to endanger the health of consumers. The potential safety hazard itself is even more terrifying.

The rising cost of organic solvents caused by the oil crisis in the 1970s and the increasing global environmental protection requirements prompted the development of solvent-free compounding technology. Especially as the restrictions on organic solvent emissions in various countries become more and more stringent, when flexible packaging manufacturers expand their lamination production capacity, they generally adopt solvent-free lamination to replace the traditional solvent lamination technology.

The solvent-free adhesive used in the solvent-free compound machine is composed of two-component polyurethane adhesive, which contains the following two components. Adhesive is referred to as curing agent, or glue B. The adhesive has a high viscosity at room temperature, but still has fluidity and is a semi-solid substance. When compounding, the main agent and curing agent are mixed in proportion and applied to the substrate by a coating roller. It is cured by the chemical reaction of the two adhesives, and it can be directly compounded with another substrate without heating and drying after coating.

In the solvent-free lamination process, a very important problem is that the coating amount is small, only about 0.5-1.8 g/m2, and the adhesive is required to be evenly coated on the composite material. At the same time, the precise ratio of the two adhesives directly affects the bond strength and curing time between the composite materials. Therefore, two-component adhesives should be accurately measured to ensure accurate proportioning. At the same time, it should be mixed evenly to ensure the uniformity of coating, so as to achieve the consistency of bond strength after material compounding. Otherwise, the performance and appearance quality of the composite material will be affected. In addition, once the two-component adhesive is mixed, the chemical reaction begins immediately, resulting in a shorter curing time. Therefore, when the production is stopped, the mixing device and the adhesive supply system need to be cleaned immediately, otherwise the mixing device and the adhesive supply system will be damaged, endangering the safety of the equipment. Although there are many metering and mixing devices in the chemical industry and other industries, they cannot meet the process requirements of micro-coating, mixing uniformity and easy cleaning of solvent-free compound machines.

Contents of the invention

In order to overcome the existing metering and mixing device, which cannot meet the technological requirements of micro-coating, uniform mixing, and easy cleaning of the solvent-free compound machine, the utility model provides a two-component adhesive metering, mixing and Cleaning device, the two-component adhesive metering, mixing and cleaning device of the solvent-free compound machine can accurately measure the two-component adhesives separately, quickly and evenly mix the two-component adhesives, and can The mixing device is cleaned to meet the process requirements of solvent-free composite machine for micro-coating, uniform mixing and easy cleaning.

The technical scheme of the utility model is a two-component adhesive metering, mixing and cleaning device for a solvent-free composite machine, the device has two sets of metering devices, a mixing device connected with the two sets of metering devices and a cleaning control system , the metering device is connected to the mixing device through pipelines, and the cleaning control system is connected to the mixing device through pipelines.

The metering device includes an adjustable-stroke cylinder for adjusting the amount of glue supplied, a metering pump piston installed in the adhesive bucket, a metering pump cylinder liner, and a metering piston rod.

The mixing device includes a pre-mixing cup and a pre-mixing spray head on the upper part, and an SK type static mixer is connected to the lower part of the pre-mixing cup.

The SK type static mixer consists of a mixing screw and a mixer shell.

The cleaning system includes a special gas-liquid distribution block, a one-way valve, a shut-off valve, and a solvent bucket.

The metering pump piston is bowl-shaped, and the upper end of the metering pump cylinder sleeve is wide-mouthed.

The pre-mixing injection head is in a layered structure with a glue inlet hole in the middle.

Since the two-component adhesive metering, mixing and cleaning device of the solvent-free compound machine is mainly composed of two sets of metering devices, mixing devices, and cleaning control systems, the two sets of metering devices are connected to the mixing device through pipelines, and the cleaning control system The cleaning device can clean the mixing device and the pipeline in time by connecting the pipeline with the mixing device to keep the pipeline clean. Therefore, the two-component adhesive metering, mixing and cleaning device of the solvent-free compound machine can accurately Two-component adhesives are measured separately to quickly and evenly mix the two-component adhesives, and the mixing device can be cleaned to meet the technological requirements of solvent-free laminating machines for micro-coating, uniform mixing, and easy cleaning.

Description of drawings

Figure 1 is a structural diagram of the two-component adhesive metering, mixing and cleaning device of the solvent-free compound machine.

Fig. 2 is a structural diagram of the metering device of the two-component adhesive metering, mixing and cleaning device of the solventless compound machine.

Fig. 3 is a structural diagram of the mixing device of the two-component adhesive metering, mixing and cleaning device of the solventless compound machine.

Detailed ways

As shown in Figure 2, in the metering device, the connecting ring 113 connects the cylinder piston rod 115 with the metering piston rod 108. Driven by the compressed air, the cylinder piston 118 reciprocates, driving the metering pump piston 105 to move up and down, and the metering pump piston 105 moves up and down. Glue tube 135, obtain quantitative glue at glue outlet block 132 places. Adjustable stroke cylinder is made up of cylinder liner 117, cylinder piston 118, cylinder lower end cover 116, cylinder upper end cover 120, magnetic induction displacement switch 119, fixed sleeve 121, adjustment sleeve 122 and lock nut 123.

The glue is installed in the adhesive barrel 101, and the liquid level indicator 109 indicating the liquid level is installed on the outside of the adhesive barrel 101. The adhesive bucket cover 110 is equipped with a feed cover 111 for replenishing adhesive, and a dryer 112 is provided in the balance air hole in the middle of the feed cover 111 to ensure that dry air enters the adhesive bucket 101. For rapid metering, a quick exhaust valve 124 and a quick exhaust valve 127 as well as a noise-reducing muffler 125 and a muffler 126 are installed at the air inlet of the cylinder.

The lower end of the upper column 114 is fixed on the support seat 131 of the adhesive barrel cover 110 . A connecting ring 113 connects the cylinder piston rod 115 to the metering pump piston rod 108 . The metering pump is fixed under the adhesive bucket cover 110 through the central column 107 and suspended in the adhesive bucket 101 . The metering pump is composed of a metering pump cylinder liner 104, a metering pump piston 105, a metering piston rod 108, an upper end cover 106 of the metering pump and a lower end cover 102 of the metering pump. The lower column 103 firmly connects the metering pump upper end cover 106 and the metering pump lower end cover 102 together. The one-way valve 137 is connected with the lower end cover 102 of the metering pump through a straight pipe joint 138 . The glue outlet pipe 135 undertaking the glue outlet task connects the one-way valve 137 with the glue outlet block 132 . For the convenience of installation, a straight pipe joint 133 and a plate joint 134 are used to realize the connection of the rubber outlet pipe 135 and the glue outlet block 132 . Use the pipe joint 130 to connect the glue outlet block 132 with the manual stop valve 4 . On the glue outlet block 132, a shut-off valve 129 for controlling glue back is installed, a bent back rubber hose 128 is installed on the upper end, and a straight back glue hose 136 leading to the inside of the adhesive barrel 101 is installed below the glue outlet block 132 .

As shown in Figure 3, in the mixing device, the upper pre-mixing cup 305 for preliminary mixing is connected with the lower SK static mixer. Glue A enters the glue inlet 301 through the connector 8 and glue B through the connector 28 . The mixing nozzle 304 preliminarily mixes the two adhesives. The SK static mixer consists of a mixing screw 310 and a mixer shell 311 .

The straight pipe joint 302 and the straight pipe joint 303 connect the connectors 8 and 28 with the glue feeding seat 301 . The adhesive flowing in from the connector 8 and the connector 28 enters the mixing device through the glue feeding seat 301 . Glue A enters the pre-mixing cup 305 through the pre-mixing nozzle 304, while glue B directly enters the pre-mixing cup 305 for preliminary mixing. The SK static mixer consists of a cylindrical pin 307, a cylindrical pin 315, a mixing screw 310, a static mixer shell 311, a ferrule 308 pre-compressed on the static mixer shell 311, a ferrule 314 and a loose sleeve on the mixer shell 311. The ferrule nut 309 and the ferrule nut 313 are formed. The upper end of the static mixer is connected to the pre-mixing cup 305 through a straight pipe joint 306, and the lower end of the static mixer is sent to the coating device through a straight pipe joint 316 to deliver uniform A and B mixed glue.

As shown in FIG. 1 , in order to control the glue supply and cleaning state, the metering device 1 for quantitatively supplying glue A is connected with the gas-liquid distribution valve 5 through the manual shut-off valve 4 . The metering device 2 for quantitatively supplying glue B is connected with the gas-liquid distribution valve 26 through a manual shut-off valve 27 . Stop valve 6 and stop valve 25 play the role of controlling glue, solvent and compressed air. The stop valve 6 connects the gas-liquid distribution valve 5 with the mixing device 3 by means of the connector 8, the stop valve 25 connects the gas-liquid distribution valve 26 with the mixing device 3 by means of the connector 28, and the lower end of the mixer 3 can obtain uniform mixing of A and B. glue.

In the cleaning part, the one-way valve 12 and the manual stop valve 13 are connected with the air inlet of the solvent barrel 14 , and the manual stop valve 15 is connected with the solvent barrel 14 and the gas-liquid distribution valve 17 . Check valve 10 is housed between pipeline 9 and pipeline 11 between stop valve 16 and stop valve 7 to prevent glue A from entering the gas source. Similarly, a one-way valve 22 is installed between the pipeline 21 and the pipeline 23 between the shut-off valve 20 and the shut-off valve 24 to prevent the glue B from entering the air source.

The working process of the two-component adhesive metering, mixing and cleaning device of the solvent-free compound machine is as follows, and the metering pump works by volume metering. During work, the glues A and B are injected into the specially designed glue bucket 101. The metering pump is completely immersed in the raw glue. The piston rod 108 of the metering pump is driven by a powerful air motor to reciprocate up and down. This air motor has an adjustable stroke cylinder. When the metering pump piston 105 rises to the highest limit position, the raw material flows into the metering pump cylinder liner 104 of the metering pump.

The metering pump piston has some similarities with the one-way valve. When it moves down and enters the metering cylinder liner 104, the raw glue is under the pressure of the metering pump piston 105, and the glue is discharged from the rubber outlet pipe.

When the metering pump piston moves down to the end of the working stroke, a certain amount of glue required is discharged from the metering pump. Then, the outlet check valve valve 137 is closed and the piston returns to the starting line.

During the return operation, a high vacuum is generated between the metering pump piston and the metering cylinder liner. Once the piston leaves the metering cylinder liner, the vacuum is replaced by the sucked back material glue. Start the next working cycle.

The measured two kinds of adhesives enter the mixing device through the pipeline respectively, the glue A enters the pre-mixing nozzle, and enters the pre-mixing cup from the staggered small holes, while the glue B directly enters the pre-mixing cup. Initial mix in premix cup. The pre-mixed glue enters the static mixer through the straight pipe joint for final mixing, which is completed by the SK static mixer.

Cleaning is controlled by a manual air valve, and the solvent barrel 14 is used for adorning the cleaning solvent. The different units are connected by a quick connection device. Under a certain pressure, the solvent enters the mixing device to complete the cleaning of the mixing device.

The shut-off valve 4 and the shut-off valve 27 are closed, and when the system does not supply glue, the cleaning system starts to work. Driven by compressed air, the solvent in the solvent barrel 14 first cleans the mixer. Then, the compressed air entering through the one-way valve 18 and the shut-off valve 19 thoroughly cleans the mixer.

Claims (7)

1, a kind of two-component adhesive metering, mixing and cleaning device of solvent-free composite machine, it is characterized in that: mixing arrangement (3) and cleaning control system that this device has two cover metering devices (1,2), is connected with two cover metering devices, metering device (1,2) is connected with mixing arrangement (3) by pipeline, and cleaning control system is connected with mixing arrangement (3) by pipeline.

2, two-component adhesive metering, mixing and the cleaning device of solvent-free composite machine according to claim 1 is characterized in that: described metering device comprises the range-adjustable cylinder regulated for the glue amount, is loaded on measuring pump piston (105), measuring pump cylinder sleeve (104), metering piston bar (108) in the adhesive bucket (101).

3, two-component adhesive metering, mixing and the cleaning device of solvent-free composite machine according to claim 1, it is characterized in that: described mixing arrangement (3) comprises superposed premixed cup (305), premixed injector head (304), and the bottom of premixed cup (305) is connected with SK type static mixer.

4, two-component adhesive metering, mixing and the cleaning device of solvent-free composite machine according to claim 3 is characterized in that: described SK type static mixer is made up of mixing auger sheet (310) and blender shell (311).

5, two-component adhesive metering, mixing and the cleaning device of solvent-free composite machine according to claim 1 is characterized in that: described purging system comprises special gas-liquid allocation block (5,17,26), check valve (12,10,22), stop valve (13,15,16,19,20,7,24), solvent barrel (14).

6, two-component adhesive metering, mixing and the cleaning device of solvent-free composite machine according to claim 2 is characterized in that: described measuring pump piston (105) is bowl-type, and measuring pump cylinder sleeve (104) upper end is a wide-mouth.

7, two-component adhesive metering, mixing and the cleaning device of solvent-free composite machine according to claim 3 is characterized in that: described premixed injector head (304) is the layered laminate structure, and there is glue feeding opening the centre.

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