CN111650077B - Paper pulp molding material imbibition performance detection device - Google Patents
Paper pulp molding material imbibition performance detection device Download PDFInfo
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- CN111650077B CN111650077B CN202010666153.5A CN202010666153A CN111650077B CN 111650077 B CN111650077 B CN 111650077B CN 202010666153 A CN202010666153 A CN 202010666153A CN 111650077 B CN111650077 B CN 111650077B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
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Abstract
The invention provides a device for detecting the liquid absorption performance of a paper pulp molding material. The device comprises a control module, a detection cylinder, a sealing gasket, a bottom plate, a support frame, an electromagnet, a peristaltic pump, a liquid storage tank, an air cylinder, a squeezing block, a water absorbing material and a balance. The device can detect the pulp molding sample with smaller size (the diameter is 3-5.5cm), the liquid inlet and the liquid extraction of the peristaltic pump are controlled by the control module, the bottom plate and the detection cylinder are sealed by the electromagnet, and the cylinder is pressed to remove the water adsorbed on the surface of the pulp molding sample, so that the complexity of the detection step is reduced, and the measurement precision is improved. Therefore, the invention has the characteristics of high measurement precision and simple and convenient operation.
Description
Technical Field
The invention relates to a device for measuring the liquid absorption performance of a paper pulp molding material. In particular to a device for measuring the liquid absorption performance of a pulp molding material based on a gravimetric method. Belongs to the field of liquid absorption performance measurement.
Background
Plastic products are widely applied in the field of packaging due to low cost and excellent packaging performance, but environmental protection problems such as difficult degradation are gradually shown. With the deep understanding of the environmental protection of plastic packaging products, the policy of restricting plastic for various countries is coming out in succession in recent years. The paper pulp molding product has the advantages of renewable raw materials, degradable product, small environmental pollution and the like, and is one of the green packaging materials which have the highest potential to replace plastic products in the packaging market at present.
With the expansion of the application range of the pulp molded product (such as the linings of lunch boxes and mobile phone boxes), the liquid absorption performance of the pulp molded product needs to be detected according to the application or transportation requirements of the product. At present, a device for measuring the liquid absorption performance or water absorption performance of paper products is mainly based on GB/T1540 2002 'measurement method for water absorption of paper and paperboard' (Bo method). The detection area of the paper sample is required to be large (100 cm) by the device2) The measurement process is complicated and the manual detection intensity is high, so that the measurement precision is greatly influenced by an operator. Pulp molded products (such as cell phone case liners or small meal boxes) have a small detection area, typically less than 8cm, in many cases. Therefore, aiming at the pulp molding material, how to reduce the manual detection strength and improve the measurement precision is a key problem to be solved by the existing equipment.
Disclosure of Invention
In order to overcome the defects of the existing equipment, the invention provides a device for measuring the liquid absorption performance of a pulp molding material. The device can detect a paper pulp molding sample with a small size (the diameter is 3-5.5cm), liquid inlet and liquid extraction of the peristaltic pump and the electromagnet are controlled by the control module to seal the bottom plate and the cylinder body and press the cylinder to remove water adsorbed on the surface of the paper pulp molding sample, so that the complexity of the detection step is reduced, and the measurement precision is improved to overcome the defect of detection of the traditional water (or liquid) absorption device on paper pulp molding.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a device for detecting liquid absorption performance of a pulp molding material comprises a control module, a detection cylinder body (1), a sealing gasket (2), a bottom plate (3), a support frame (4), an electromagnet (5), a peristaltic pump (6), a liquid storage tank (7), an air cylinder (8), a squeezing block (9), a water absorption material (10) and a balance; the bottom plate (3) is arranged on the support frame (4), and the electromagnet (5) is arranged below the bottom plate (3); the detection cylinder (1) consists of a top cylinder (11) and a bottom cylinder (12), a through hole (121) is formed in the bottom end of the cylinder wall of the bottom cylinder (12), the sealing gasket (2) is installed on the bottom cylinder (12), and the detection cylinder (1) is limited to be placed on the bottom plate (3) through a positioning hole (122) in the bottom cylinder (12) and a positioning column (31) in the bottom plate (3); one end of the peristaltic pump (6) is connected with the detection cylinder body (1) through a hose, and the other end is connected with the liquid storage tank (7) through a hose; the air cylinder (8) is connected with the squeezing block (9), the water absorbing material (10) is installed at the bottom of the squeezing block (9), the air cylinder (8) is installed right above the detection cylinder body (1), and the squeezing block (9) is driven to move in and out of the detection cylinder body (1) through the up-and-down movement of the air cylinder (8).
The detection cylinder (1) is made of magnetizable iron material, the inner diameter is 3-5cm, and the outer diameter of the bottom cylinder (12) is larger than the outer diameter of the top cylinder (11) by more than 4 cm; the aperture of the through hole (121) on the bottom cylinder (12) is not more than 4 mm; the bottom cylinder (12) is provided with at least two positioning holes (122).
The bottom plate (3) is provided with a positioning column (31) corresponding to the positioning hole (122).
The electromagnet (5) can suck the detection cylinder body (1) after being electrified to form sealing.
The peristaltic pump (6) performs liquid injection and liquid discharge through the through hole (121), and the liquid injection time is kept within 6 s.
The squeezing block (9) is a cylindrical block, the diameter of the squeezing block is 2-4mm smaller than the inner diameter of the detection cylinder body (1), and the water absorbing material (10) is water absorbing paper.
The control module controls liquid injection and discharge of the peristaltic pump (6), up-and-down movement of the air cylinder (8) and attraction of the electromagnet (5).
Compared with the prior art, the invention has the advantages that: the automatic liquid feeding and discharging device adopts the control module, the peristaltic pump (6), the electromagnet (5), the cylinder (8) and other devices to realize automatic liquid feeding and discharging, the detection cylinder body (1) is automatically sealed, and water adsorbed on the surface of the pulp molding sample is automatically removed, so that the manual detection strength is greatly reduced, and the detection precision is improved. Therefore, the device has the characteristics of simple and convenient operation and high measurement precision, and has wide application prospect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic view of a device for detecting liquid absorption performance of a pulp molding material;
fig. 2 is a schematic view of the bottom cylinder.
Wherein: 1-detection cylinder, 2-sealing gasket, 3-bottom plate, 4-support frame, 5-electromagnet, 6-peristaltic pump, 7-liquid storage tank, 8-cylinder, 9-squeezing block, 10-water absorbing material, 11-top cylinder, 12-bottom cylinder, 121-through hole, 122-positioning hole and 31-positioning column.
Detailed Description
The present invention is further described with reference to the following specific embodiments and the accompanying drawings, but it should be noted that these embodiments are only for illustrating the present invention and do not limit the scope of the present invention, and those skilled in the art can make various changes or modifications after reading the detailed description of the present invention, which fall within the limited scope of the present invention.
The embodiment one of the liquid absorption performance detection device for the pulp molding material of the invention is as follows: as shown in figure 1, the device comprises a control module, a detection cylinder body (1), a sealing gasket (2), a bottom plate (3), a supporting frame (4), an electromagnet (5), a peristaltic pump (6), a liquid storage tank (7), a cylinder (8), a squeezing block (9), a water absorbing material (10) and a balance; the bottom plate (3) is arranged on the support frame (4), and the electromagnet (5) is arranged below the bottom plate (3). Detect barrel (1) and constitute by top barrel (11) and bottom barrel (12), open a through-hole (121) on the section of thick bamboo wall bottom of bottom barrel (12), install on bottom barrel (12) sealed pad (2), detect barrel (1) and place on bottom plate (3) through locating hole (122) on bottom barrel (12) and reference column (31) on bottom plate (3) are injectd. One end of the peristaltic pump (6) is connected with the detection cylinder body (1) through a hose, and the other end is connected with the liquid storage tank (7) through a hose. The air cylinder (8) is connected with the squeezing block (9), the water absorbing material (10) is installed at the bottom of the squeezing block (9), the air cylinder (8) is installed right above the detection cylinder body (1), and the squeezing block (9) is driven to move in and out of the detection cylinder body (1) through the up-and-down movement of the air cylinder (8).
The detection cylinder (1) is made of magnetizable iron material (such as magnetic stainless steel), the inner diameter is 4cm, and the outer diameter of the bottom cylinder (12) is 5cm larger than that of the top cylinder (11). As shown in figure 2, the aperture of the through hole (121) on the bottom cylinder (12) is 2.5 mm. The bottom cylinder (12) is provided with two positioning holes (122).
The bottom plate (3) is provided with two positioning columns (31) corresponding to the positioning holes (122).
The electromagnet (5) can suck the detection cylinder body (1) after being electrified to form sealing.
The peristaltic pump (6) performs liquid injection and liquid discharge through the through hole (12), and the liquid injection time is 5 s.
The squeezing block (9) is a cylindrical block, the diameter of the squeezing block is 3mm smaller than the inner diameter of the detection cylinder body (1), the water absorbing material (10) is water absorbing paper, and the squeezing block (9) can be adhered to the water absorbing material through double-sided glue.
The control module controls the liquid injection and discharge of the peristaltic pump (6), the up-and-down movement of the air cylinder (8) and the attraction of the electromagnet (5).
The specific measurement steps are as follows:
(a) a liquid tank (7) is filled with a liquid to be measured, a weighed pulp molded sample (diameter 5cm) is placed on a base plate (3), and a detection cylinder (1) is placed on the basis of a positioning post (31).
(b) And a control module switch is turned on, the control module sends an instruction to be connected with a power supply of the electromagnet (5), and the bottom plate (3) and the detection cylinder body (1) are completely sealed through strong magnetic force.
(c) The control module sends an instruction to enable the peristaltic pump (6) to rotate in the forward direction, namely, liquid is rapidly injected into the detection barrel body (1), and the liquid injection amount is controlled through liquid injection time and liquid injection speed. When the liquid level in the detection cylinder (1) reaches a specific position (for example, 10mm higher than the bottom end of the bottom cylinder (12)), the timer on the control module automatically counts down (for example, count down for 1min), and at the moment, the pulp molding sample is waited to absorb liquid. When the timer returns to zero, the control module sends an instruction to the peristaltic pump (6) to enable the peristaltic pump to rotate reversely, and liquid is discharged quickly.
(d) And stopping discharging after a certain time (such as 10s), controlling the amount of compressed gas in the cylinder (8) by the control module through switching on and off the electromagnetic valve on the cylinder (8) to enable the cylinder to move downwards, and keeping a certain pressure (such as 25kPa) and time (such as 10s) after the absorbent paper contacts the pulp molding sample, so that the absorbent paper can absorb water adsorbed on the surface of the pulp molding sample. The control module sends a command to the solenoid valve on the cylinder (8) again to move the solenoid valve upwards to the original position.
(e) The control module sends an instruction to cut off the power supply of the electromagnet (5), and the pulp molding sample is taken down and weighed on a balance. Finally, the water absorption was determined from the difference in weight of the pulp molded sample before and after imbibing.
Claims (5)
1. A paper pulp molding material imbibition performance detection device which characterized in that: the device comprises a control module, a detection cylinder, a sealing gasket, a bottom plate, a support frame, an electromagnet, a peristaltic pump, a liquid storage tank, a cylinder, a squeezing block, a water absorbing material and a balance; the bottom plate is arranged on the support frame, and the electromagnet is arranged below the bottom plate; the detection barrel is made of magnetizable iron materials and consists of a top barrel and a bottom barrel, a through hole is formed in the bottom end of the barrel wall of the bottom barrel, the sealing gasket is installed on the bottom barrel, and the detection barrel is limited and installed on the bottom plate through a positioning hole in the bottom barrel and a positioning column in the bottom plate; one end of the peristaltic pump is connected with the through hole on the detection cylinder body through a hose, and the other end of the peristaltic pump is connected with the liquid storage tank through a hose; the cylinder is connected with the squeezing block, the water absorbing material is arranged at the bottom of the squeezing block, the cylinder is arranged right above the detection barrel body, and the squeezing block is driven to enter and exit the detection barrel body through the up-and-down movement of the cylinder.
2. The pulp molding material liquid absorption performance detection device according to claim 1, characterized in that: the inner diameter of the detection cylinder is 2.5-5cm, and the outer diameter of the bottom cylinder is larger than the outer diameter of the top cylinder by more than 4 cm; the aperture of the through hole on the bottom cylinder is not more than 4 mm; the bottom cylinder body is provided with at least two positioning holes.
3. The pulp molding material liquid absorption performance detection device according to claim 1, characterized in that: the peristaltic pump is used for injecting and discharging liquid through the through hole, and the liquid injection time is kept within 6 s.
4. The pulp molding material liquid absorption performance detection device according to claim 1, characterized in that: the squeezing block is a cylindrical block, the diameter of the squeezing block is 2-4mm smaller than the inner diameter of the detection cylinder, and the water absorbing material is water absorbing paper.
5. The pulp molding material liquid absorption performance detection device according to claim 1, characterized in that: and the control module controls liquid injection and discharge of the peristaltic pump, up and down movement of the air cylinder and on and off of a power supply of the electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010666153.5A CN111650077B (en) | 2020-07-09 | 2020-07-09 | Paper pulp molding material imbibition performance detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010666153.5A CN111650077B (en) | 2020-07-09 | 2020-07-09 | Paper pulp molding material imbibition performance detection device |
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| CN111650077A CN111650077A (en) | 2020-09-11 |
| CN111650077B true CN111650077B (en) | 2022-05-06 |
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| US4976138A (en) * | 1988-05-28 | 1990-12-11 | Basf Aktiengesellschaft | Measuring arrangement for determining the liquid absorption of paper |
| CN201397286Y (en) * | 2009-03-17 | 2010-02-03 | 上海天祥质量技术服务有限公司 | Device used for testing the water absorption performance of napkin |
| CN202994608U (en) * | 2012-12-10 | 2013-06-12 | 宜兴丹森科技有限公司 | Testing device for absorption rate of absorbent material |
| CN205120527U (en) * | 2015-11-25 | 2016-03-30 | 天津市中科健新材料技术有限公司 | Paper that absorbs water capability test device that absorbs water |
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| US4976138A (en) * | 1988-05-28 | 1990-12-11 | Basf Aktiengesellschaft | Measuring arrangement for determining the liquid absorption of paper |
| CN201397286Y (en) * | 2009-03-17 | 2010-02-03 | 上海天祥质量技术服务有限公司 | Device used for testing the water absorption performance of napkin |
| CN202994608U (en) * | 2012-12-10 | 2013-06-12 | 宜兴丹森科技有限公司 | Testing device for absorption rate of absorbent material |
| CN205120527U (en) * | 2015-11-25 | 2016-03-30 | 天津市中科健新材料技术有限公司 | Paper that absorbs water capability test device that absorbs water |
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