Gum formulation and equipment

Abstract

This application relates to the field of adhesive preparation technology, specifically disclosing an adhesive preparation formula and equipment. The formula consists of the following components: 1000-1200 parts water, 15-21 parts alkali solution, 330-350 parts starch, 10-15 parts additives, and 2-2.3 parts borax. The additive is polyacrylamide, and the starch is tapioca starch. The purpose of this patent is to solve the problem that the adhesive performance of adhesives is affected in areas with large variations in environmental temperature and humidity, thus affecting the bonding effect of cardboard.

Description

Technical Field

[0001] This invention relates to the field of adhesive preparation technology, and in particular to an adhesive preparation formula and equipment. Background Technology

[0002] Glue (including paste) has a wide range of applications. In addition to its common uses in daily life, it is also widely used in industry, such as in the production of various types of cardboard, which requires glue to bond several layers of low-grammage paper or corrugated paper together. The main raw materials for producing glue are starch, water, caustic soda, and borax.

[0003] Adhesive production is generally carried out using a glue-making machine. The machine mixes the raw materials for producing the adhesive, and the final adhesive is inspected. Only after passing the inspection can it be used for bonding cardboard.

[0004] However, in areas with significant temperature and humidity variations, the properties of the adhesive itself will change. For example, the adhesive strength of the adhesive will decrease. Therefore, an adhesive with stronger bonding properties is needed to adapt to use in areas with significant temperature and humidity variations. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an adhesive formulation and equipment that solves the problem that the performance of adhesives is affected in areas with large variations in environmental temperature and humidity, thereby affecting the bonding effect of cardboard.

[0006] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0007] A formula for preparing an adhesive, by weight, comprises the following components: 1000-1200 parts water, 15-21 parts alkali solution, 330-350 parts starch, 10-15 parts additive, and 2-2.3 parts borax, wherein the additive is polyacrylamide and the starch is tapioca starch.

[0008] In addition, a method for preparing adhesive is provided, which includes the following steps:

[0009] S1: Place the raw materials for producing the adhesive in separate storage tanks;

[0010] S2: Add water to the mixing tank and stir, then heat it;

[0011] S3: After the heating is complete, add alkaline solution to the mixing tank. The discharge of alkaline solution is controlled by a pneumatic valve. After the alkaline solution is added, the alkaline solution and water are mixed at high speed to carry out the mixing process.

[0012] S4: After the mixing process is completed, add starch and mix the starch thoroughly with the glue in the mixing tank. After mixing, add additives and borax and stir. During the process of adding starch and additives, the viscosity test is turned on and the viscosity is controlled between 300 and 30000 cps.

[0013] S5: After the additive is added in step S4, stir for 8 to 12 minutes. After stirring, start dispensing the adhesive. After dispensing the adhesive from the mixing tank, clean the mixing tank and clean the viscometer.

[0014] The principle of this scheme is:

[0015] The proportions of raw materials added to the adhesive are adjusted. Then, additives are added and mixed during the adhesive production process. During this process, the adhesive strength of the produced adhesive is controlled by controlling the amount of alkali added and the stirring speed and time of the mixing tank, thereby improving the adhesive performance under temperature and humidity conditions.

[0016] The beneficial effects of this plan are:

[0017] In this application, the gelatinization temperature of the adhesive under normal conditions is 53℃±2 in autumn and winter, and 58℃±2 in spring and summer. By reducing the amount of alkali solution to control the gelatinization temperature and carrying out the heating process in the mixing tank, the adhesive strength of the adhesive is increased to 110N / m~160N / m. This improves the adhesive strength of the adhesive. In environments with increased humidity, by improving the adhesive strength of the adhesive, the application range of the adhesive is widened, and the bonding effect of the adhesive can be guaranteed in humid environments.

[0018] Furthermore, the mixture contains 1150 parts water, 20 parts alkali solution, 345 parts starch, 13.5 parts additives, and 2 parts borax. The additives are polyacrylamide, and the starch is tapioca starch. The viscosity value is set to 18S.

[0019] Furthermore, in step S1, the storage tanks include a No. 1 tank for storing alkali solution, a No. 2 tank for storing starch, and a No. 3 tank for storing borax and additives. The No. 1, No. 2, and No. 3 tanks are respectively connected to the mixing tank. The No. 1 and No. 2 tanks are respectively equipped with weighing devices to control the weight of materials entering the mixing tank.

[0020] Furthermore, the heating process in step S2 is as follows: during the water addition process, when the amount of water added exceeds the set heating conditions, the steam pneumatic valve is opened for heating. When the temperature inside the mixing tank reaches the temperature set value in the formula, the steam valve is closed to stop adding steam.

[0021] Furthermore, in step S2, a drive shaft is vertically installed inside the mixing tank. The mixing tank is cylindrical, and evenly distributed stirring rollers are horizontally connected to the drive shaft. The stirring rollers are divided into two sections, namely roller number one and roller number two. Roller number two is connected to roller number one by a spring. One end of roller number one is fixed to the drive shaft. When the drive shaft rotates to stir the raw materials inside the mixing tank, roller number two will pop outward under the action of centrifugal force, thereby expanding the stirring range and making the stirring more uniform.

[0022] Furthermore, the inner wall of the mixing tank is provided with multiple limiting annular grooves that can mate with the end of the No. 2 roller. A positioning post is fixed in the limiting annular groove located at the top of the mixing tank, and a push switch is installed inside the positioning post. At the same time, multiple rotatable flaps are respectively provided on both sides of the bottom of the mixing tank. Adjacent flaps are connected to each other by a rotating shaft, which runs longitudinally through the mixing tank. A drive motor is connected to the end of the rotating shaft, and the start and stop of the drive motor is controlled by the push switch. When mixing inside the mixing tank, due to space limitations, the mixing in the bottom corners of the mixing tank is not very uniform. At this time, it is necessary to separately mix the bottom corners of the mixing tank. When the drive shaft starts, the speed is relatively slow. At this time, the No. 2 roller pops out, but does not contact the inner wall of the mixing tank. However, when the drive shaft speed is faster or the drive shaft speed is in the high-speed gear, the No. 2 roller moves towards the positioning post and squeezes while popping out. At this time, the push switch is squeezed and controls the drive motor to start, the flaps rotate, and the difficult-to-mix areas in the bottom corners of the mixing tank are mixed.

[0023] Furthermore, an annular scraper ring is movably connected to the inner wall of the mixing tank. The scraper ring is magnetic, and its outer circumference is in close contact with the mixing tank. A first cavity is provided on the outer circumference of the mixing tank, and an annular first magnetic block is placed inside the first cavity. The first magnetic block is slidably and sealingly connected to the inner wall of the first cavity, and can attract one side of the scraper ring inside the mixing tank. A lead screw motor is vertically connected to one side of the first magnetic block, and a reciprocating first slider is slidably connected to the lead screw of the lead screw motor. The first slider passes through one side of the first magnetic block and is fixedly connected to it. After the glue is prepared, the glue needs to be discharged and collected, but some glue will adhere to the mixing tank. At this time, the lead screw motor drives the first slider to move on the lead screw, thereby causing the scraper ring inside the mixing tank to move up and down, scraping off the glue adhering to the inner wall of the mixing tank.

[0024] Furthermore, a second transverse cavity is provided at the bottom of the mixing tank. A second slider, which can slide freely laterally, is placed inside the second cavity. The second slider is magnetic. At the same time, a scraper that can attract the second slider is placed at the bottom of the mixing tank. One end of the second cavity is connected to the bottom of the first cavity. At the same time, a vent valve connected to the outside is provided on the side of the second cavity away from the screw motor. The opening and closing of the vent valve is controlled by a first switch, which is fixedly set on the inner side wall of the first cavity above the first magnetic block. Since the first slider, the first magnetic block and the first cavity are in a sealed state, when the screw motor starts to scrape off the glue on the inner wall of the mixing tank, the space below the first slider shrinks. As a result, the gas below the first slider enters the second cavity and pushes the second slider to move laterally. At this time, under the attraction of the second slider, the scraper moves laterally and pushes the glue squeezed at the bottom of the mixing tank into the discharge port. Attached Figure Description

[0025] Figure 1 This is a planar schematic diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the interior of the mixing tank of the present invention;

[0027] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of region (A) in the middle.

[0028] The reference numerals in the accompanying drawings include:

[0029] Mixing tank 1, water inlet pipe 1-1, steam pipe 1-2, discharge pipe 1-3, No. 1 tank 2, No. 2 tank 3, No. 3 tank 4, water inlet pipe 1-1, drive shaft 5, No. 1 roller 5-2, No. 2 roller 5-1, spring 5-3, flap 6, rotating shaft 6-1, first cavity 7, first slider 7-1, first magnetic block 7-2, first switch 7-3, second switch 7-4, lead screw 7-4, second cavity 8, second slider 8-1, scraper 8-2, vent valve 8-3, scraper ring 9, ring groove 9-1, positioning column 9-2, press switch 9-3. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation methods.

[0031] With attachment Figure 2 For example, in the attached diagram, the flap 6 is set on the left and right sides inside the mixing tank 1, and the rotating shaft 6-1 runs longitudinally through the inside of the mixing tank 1, using this as the directional reference.

[0032] Example 1 is basically as shown in the attached document. Figure 1 As shown:

[0033] The following materials are needed to prepare the glue: 1150 kg of water, 20 kg of alkali solution, 345 kg of starch, 13.5 kg of additives, and 2 kg of borax. The additives are polyacrylamide and the starch is tapioca starch.

[0034] The preparation steps for the adhesive are as follows:

[0035] S1: The raw materials for producing the adhesive are placed in storage tanks, which are divided into Tank 1 (2), Tank 2 (3), and Tank 3 (4). The layout of the storage tanks is shown in the attached diagram. Figure 1 As shown, tank 2, tank 3 and tank 4 are connected to mixing tank 1 for mixing glue. Weighing devices are installed inside tank 2, tank 3 and tank 4 to control the quality of raw materials entering mixing tank 1. Tank 2 is used to store alkali solution, tank 3 is used to store starch, and tank 4 is used to store borax and additives, the additive being polyacrylamide.

[0036] S2: Water is added into the mixing tank 1 through the water inlet pipe 1-1, and then steam is introduced into the mixing tank 1 through the steam pipe 1-2 to heat the inside of the mixing tank 1 to 27°C.

[0037] S3: After the heating is completed, the alkaline solution is added from tank 2 to the mixing tank 1. The discharge of the alkaline solution is controlled by a pneumatic valve. After the alkaline solution is added, the alkaline solution and water are mixed thoroughly by high-speed stirring. The high-speed rotation speed is 300 rpm.

[0038] S4: After the stirring process is completed, add starch and mix it thoroughly with the mixture in mixing tank 1. After mixing, add additives and borax and stir. During the addition of starch and additives, viscosity detection is activated. Viscosity is related to the addition of alkali solution. If the actual viscosity measured by the machine during the addition of alkali solution is greater than the preset viscosity, the addition of alkali solution will be stopped. After the alkali solution is added, start stirring at low speed. When the viscosity value exceeds the set value, the additives and starch can be added.

[0039] S5: After the starch and additives are added in step S4, the stirring time is 12 minutes. After the stirring is finished, the glue discharge begins. After the glue discharge in the mixing tank 1 is finished, pour cleaning water into the mixing tank 1 to clean the mixing tank 1. At the same time, clean the viscometer.

[0040] In step S3 above, the mixing tank 1 has a cubic structure. A vertical drive shaft 5 is set at the center of the mixing tank 1. The start and stop of the drive shaft 5 are controlled by a motor at the top of the outer wall of the mixing tank 1. A first roller 5-2 is fixed on both sides of the vertically set drive shaft 5. A second roller 5-1 is connected to the other side of the first roller 5-2 by a spring 5-3. The first roller 5-2 and the second roller 5-1 are arranged horizontally to form a mixing roller. The drive shaft 5 drives the mixing roller to rotate under the rotation of the motor, thereby stirring the raw materials. Under the action of centrifugal force, the second roller 5-1 is thrown outward to expand the mixing area.

[0041] During the mixing process, due to the limited space inside the mixing tank 1, raw materials tend to accumulate at the bottom corners, resulting in poor mixing. To address this, multiple rotatable flaps 6 are installed on the left and right sides of the lower end of the mixing tank 1. Adjacent flaps 6 are connected by a rotating shaft 6-1, which runs longitudinally through the mixing tank 1. A motor for driving the rotation of the rotating shaft 6-1 is connected to the end of the shaft (not shown in the attached diagram). Simultaneously, an annular groove 9-1 is formed on the inner wall of the mixing tank 1, which mates with the side of the second roller 5-1. A positioning post 9-2 is installed within the annular groove 9-1 located at the upper part of the mixing tank 1. A push-button switch 9-3 for controlling the start of the rotating shaft 6-1 motor is installed within the positioning post 9-2. At startup, the drive shaft 5 rotates at a relatively slow speed, and the second roller 5-1 will not get stuck in the annular groove 9-1 under the action of centrifugal force. At this time, the demand for raw material stirring is weak. However, when the speed of the drive shaft 5 is maintained at a certain level, the speed of the drive shaft 5 is higher, and the second roller 5-1 will embed into the annular groove 9-1 and squeeze the positioning post 9-2 in the annular groove 9-1, thereby squeezing the push switch 9-3 that controls the start of the motor of the rotating shaft 6-1. At this time, the flap 6 rotates under the drive of the rotating shaft 6-1 to stir the raw materials located at the bottom of the mixing tank 1. Secondly, when the speed of the motor of the drive shaft 5 is adjusted to the high speed position, the squeeze switch can also start the motor connected to the rotating shaft 6-1. When the push switch 9-3 is not squeezed for a long time, that is, the drive shaft 5 stops rotating, the motor of the drive shaft 6-1 stops supplying power.

[0042] A first cavity 7 is provided on the outer periphery of the mixing tank 1. A ring-shaped first magnetic block 7-2 is movably connected within the first cavity 7, and the first magnetic block 7-2 is fitted onto the outer periphery of the mixing tank 1. Simultaneously, a scraper ring 9 is slidably connected to the inner wall of the mixing tank 1, and the scraper ring 9 attracts the first magnetic block 7-2. A lead screw motor is vertically arranged on the left side of the first cavity 7, and the lead screw 7-4 of the lead screw motor extends vertically into the first cavity 7. A first slider 7-1 is movably connected to the lead screw 7-4, and the first slider 7-1 interacts with the first magnetic block 7-2. One side is clamped and fixed, and the first slider 7-1, the first magnetic block 7-2 and the first cavity 7 are slidably sealed together. Since the glue is relatively viscous, after the glue production is completed, the glue needs to be discharged from the mixing tank 1 to facilitate the production of the next batch of glue. However, after the glue is discharged, some glue will adhere to the inner wall of the mixing tank 1. At this time, the lead screw motor starts, and the first slider 7-1 on the lead screw 7-4 moves downward along the lead screw 7-4, which in turn drives the scraper ring 9 to move downward, scraping the glue off the inner wall of the mixing tank 1.

[0043] A second, transverse cavity 8 is provided at the bottom of the mixing tank 1. The left side of the second cavity 8 is connected to the bottom of the first cavity 7. A slidable second slider 8-1 is placed inside the second cavity 8. The second slider 8-1 is magnetic. At the same time, a horizontally movable scraper 8-2 is placed at the bottom of the mixing tank 1. The bottom of the scraper 8-2 can be attracted to the second slider 8-1. When the scraper ring 9 scrapes off the glue, some glue will accumulate at the bottom of the mixing tank 1 because the bottom of the mixing tank 1 is not horizontal. As the screw motor drives the scraper ring 9 to move downward, the gas below the first slider 7-1, the first magnetic block 7-2 and the first cavity 7 slide and seal. The gas is pushed into the second cavity 8 by the first slider 7-1. The compressed gas will push the second slider 8-1 to slide. While the second slider 8-1 slides, it can drive the scraper 8-2 to push the glue remaining at the bottom into the discharge pipe 1-3 located on the right side of the bottom of the mixing tank 1. The discharge pipe 1-3 discharges the glue for bonding.

[0044] A first switch 7-3 for compression is fixedly installed on the side wall of the second cavity 8. The first switch 7-3 is higher than the height of the first slider 7-1. When the first slider 7-1 is at the top of the lead screw 7-4, the first slider 7-1 can compress the first switch 7-3. At the same time, a vent valve 8-3 communicating with the outside is provided on the right side of the second cavity 8. The first switch 7-3 is used to control the opening and closing of the vent valve 8-3. When the first slider 7-1 moves downward, the first slider 7-1 releases the first switch 7-3. At this time, the vent valve 8-3 slowly opens, and the second slider 8-1 moves in the second cavity 8. When the second slider 8-1 moves to the bottom end of the lead screw 7-4, the second slider 8-1 is at the rightmost end of the second cavity 8. The lead screw 7-4 drives the slider to move upward, and then the second slider 8-1 moves to the left. When the first slider 7-1 compresses the first switch 7-3, the vent valve 8-3 closes. By controlling the opening and closing of the vent valve 8-3, the second slider 8-1 can move laterally back and forth in the second cavity 8.

[0045] The specific implementation process is as follows:

[0046] When using, place the raw materials into tank 2, tank 3 and tank 4 respectively. Then, put the raw materials into mixing tank 1 according to the glue preparation steps mentioned above. Driven by the drive motor, the drive shaft 5 drives the mixing roller to rotate and stir the raw materials. At this time, the drive shaft 5 slowly drives the mixing roller to rotate.

[0047] When proceeding to step S4, the drive shaft 5 is in high-speed gear. Under the action of centrifugal force, the second roller 5-1 is thrown into the annular groove 9-1, which then squeezes the press switch 9-3. The press switch 9-3 controls the motor connected to the rotating shaft 6-1 to start. At this time, the flap 6 stirs the raw material located at the bottom of the mixing tank 1. After the stirring time reaches 12 minutes, the performance of the stirred glue is tested. After the test is qualified, the stirring of the glue is stopped, the discharge pipe 1-3 is opened, and the glue is discharged. Then the lead screw motor is started. The first slider 7-1 of the lead screw motor drives the first magnetic block 7-2 to move downward, and the scraper ring 9 scrapes off the glue adhering to the inner wall of the mixing tank 1.

[0048] As the lead screw motor starts, the space below the first slider 7-1 is compressed, and the gas is squeezed into the second cavity 8. The gas pushes the second slider 8-1 to move laterally, and the scraper 8-2, under the adsorption of the second slider 8-1, pushes some of the glue accumulated at the bottom of the mixing tank 1 to the discharge pipe 1-3.

[0049] Example 2:

[0050] The difference from the above embodiments is that the following materials are required for the preparation of the glue: 1000 kg of water, 15 kg of alkali solution, 330 kg of starch, 10 kg of additives, and 2 kg of borax. The additives are polyacrylamide and the starch is tapioca starch.

[0051] Example 3:

[0052] The difference from the above embodiments is that the adhesive requires the following materials for preparation: 1200 kg of water, 21 kg of alkali solution, 350 kg of starch, 15 kg of additives, and 2.3 kg of borax. The additive is polyacrylamide, and the starch is tapioca starch.

[0053] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for preparing adhesive, characterized in that: It includes the following steps: S1: Place the raw materials for producing the adhesive in separate storage tanks; S2: Add water to the mixing tank and stir, then heat it; S3: After the heating is complete, add alkaline solution to the mixing tank. The discharge of alkaline solution is controlled by a pneumatic valve. After the alkaline solution is added, the alkaline solution and water are mixed at high speed to carry out the mixing process. S4: After the mixing process is complete, add starch and mix the starch thoroughly with the glue in the mixing tank. After mixing, add additives and borax and stir. During the addition of starch and additives, the viscosity detection is turned on. S5: After the additive is added in step S4, the stirring time is 8 to 12 minutes. After stirring, the glue discharge begins. After the glue discharge in the mixing tank is completed, clean the mixing tank and clean the viscometer. In step S2, a drive shaft is vertically installed inside the mixing tank. The mixing tank is cylindrical, and evenly distributed stirring rollers are horizontally connected to the drive shaft. The stirring rollers are divided into two sections, namely roller number one and roller number two. Roller number two is connected to roller number one by a spring. One end of roller number one is fixed to the drive shaft. The inner side wall of the mixing tank has multiple limiting ring grooves that can cooperate with the end of roller number two. A positioning post is fixed in the limiting ring groove located at the upper part of the mixing tank. A push switch is installed inside the positioning post. At the same time, multiple rotatable flaps are respectively set on both sides of the bottom of the mixing tank. Adjacent flaps are connected to each other by a rotating shaft. The rotating shaft runs longitudinally through the mixing tank. A drive motor is connected to the end of the rotating shaft. The start and stop of the drive motor are controlled by the push switch. The heating process in step S2 is as follows: during the water addition process, when the amount of water added exceeds the set heating condition, the steam adding pneumatic valve is opened for heating. When the temperature in the mixing tank reaches the temperature set value in the formula, the steam adding valve is closed to stop adding steam.

2. The method for preparing an adhesive according to claim 1, characterized in that: In step S1, the storage tanks include a No. 1 tank for storing alkali solution, a No. 2 tank for storing starch, and a No. 3 tank for storing borax and additives. The No. 1, No. 2, and No. 3 tanks are respectively connected to the stirring tank.

3. An adhesive preparation apparatus for implementing the adhesive preparation method of claim 1, characterized in that: In step S2, a drive shaft is vertically installed inside the mixing tank. The mixing tank is cylindrical, and evenly distributed stirring rollers are horizontally connected to the drive shaft. The stirring rollers are divided into two sections, namely roller number one and roller number two. Roller number two is connected to roller number one by a spring. One end of roller number one is fixed to the drive shaft. The inner side wall of the mixing tank has multiple limiting ring grooves that can cooperate with the end of roller number two. A positioning post is fixed in the limiting ring groove located at the upper part of the mixing tank. A push switch is installed inside the positioning post. At the same time, multiple rotatable flaps are respectively set on both sides of the bottom of the mixing tank. Adjacent flaps are connected to each other by a rotating shaft. The rotating shaft runs longitudinally through the mixing tank. A drive motor is connected to the end of the rotating shaft. The start and stop of the drive motor are controlled by the push switch.

4. The adhesive preparation equipment according to claim 3, characterized in that: An annular scraper ring is movably connected to the inner wall of the mixing tank. The scraper ring is magnetic, and its outer circumference is in close contact with the mixing tank. A first cavity is provided on the outer circumference of the mixing tank, and an annular first magnetic block is placed inside the first cavity. The first magnetic block is slidably and sealingly connected to the inner wall of the first cavity, and the first magnetic block can attract one side of the scraper ring inside the mixing tank. A lead screw motor is vertically connected to one side of the first magnetic block, and a reciprocating first slider is slidably connected to the lead screw of the lead screw motor. The first slider passes through one side of the first magnetic block and is fixed to the first magnetic block.

5. The adhesive preparation equipment according to claim 4, characterized in that: The bottom of the mixing tank is provided with a second transverse cavity. A second slider that can slide freely laterally is placed in the second cavity. The second slider is magnetic. At the same time, a scraper that can attract the second slider is placed at the bottom of the mixing tank. One end of the second cavity is connected to the bottom of the first cavity. At the same time, a vent valve connected to the outside is provided on the side of the second cavity away from the lead screw motor. The opening and closing of the vent valve can be controlled by a first switch. The first switch is fixedly set on the inner side wall of the first cavity above the first magnetic block.

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