CN107831066B - Method for judging whether sealing firmness of hot melt adhesive of corrugated case meets requirements - Google Patents
Method for judging whether sealing firmness of hot melt adhesive of corrugated case meets requirements Download PDFInfo
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- CN107831066B CN107831066B CN201711029253.1A CN201711029253A CN107831066B CN 107831066 B CN107831066 B CN 107831066B CN 201711029253 A CN201711029253 A CN 201711029253A CN 107831066 B CN107831066 B CN 107831066B
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- corrugated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
Abstract
The invention discloses a method for judging whether the sealing firmness of a hot melt adhesive of a corrugated case meets the requirement, which comprises the following steps: firstly, acquiring a box bottom firmness index of a shaking cover at the bottom of a tested corrugated box, wherein the unit is N; then, acquiring a box surface firmness index of the tested corrugated box top swing cover to be opened after the box is sealed by hot melt adhesive after the commodity is loaded, wherein the unit is N; and then judging whether the sealing firmness of the hot melt adhesive of the corrugated case meets the requirement or not according to the formula (1) and the formula (2). The applicant has statistically determined in long-term tests that the measures according to the invention provide firmness indicators at the bottom and top of the container, and that the packaged product of a factory sold corrugated beer carton does not fall off and/or pop over the entire shelf life when these indicators satisfy the formula (1) and the formula (2), respectively, thereby avoiding any impact on the quality of the beer product and the image of the producer due to the falling off and/or popping of the corrugated carton during the beer sale.
Description
Technical Field
The invention relates to a method for judging whether the sealing firmness of a hot melt adhesive of a corrugated case meets requirements, and belongs to the technical field of beverage packaging.
Background
In the field of beverage packaging, corrugated containers are widely used as outer packages for products. In consideration of transportation and storage, the carton sealing firmness is an important link of the outer packaging quality, and at present, the use of hot melt adhesive for sealing is a main sealing mode of the corrugated carton.
In the prior art, after commodities are loaded in a formed corrugated paper box, the top of the box body is sealed by hot melt adhesive, wherein a certain gap is reserved between outer rocking covers on two sides of the top, and the gap is not sprayed with the hot melt adhesive. If the firmness of the hot melt adhesive sealing box is not good enough, the phenomenon of bottom falling and/or box bouncing can occur in the transportation and carrying processes, thereby damaging the image of products and production enterprises. However, no public report on a method for judging whether the sealing firmness of the hot melt adhesive of the corrugated case meets the requirements is found at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for judging whether the sealing firmness of a hot melt adhesive for a corrugated case meets the requirement.
The method for judging whether the sealing firmness of the hot melt adhesive for the corrugated case meets the requirement or not comprises the following steps of:
1) selecting two formed tested corrugated cases with the same specification, and obtaining the design value of the weight which can be borne by the two tested corrugated cases, wherein the design value is recorded as M and the unit is kg; placing the corrugated case to be tested on a workbench in a mode that the bottom of the corrugated case faces upwards, and acquiring tension data of opening one side of the outer rocking cover at the bottom of one corrugated case to be tested by using tension detection equipment, wherein the tension data is recorded as FBottom AIn the unit of N; the other tested corrugated case adopts the method to obtain the tension data for opening the outer rocking cover at the other side of the bottom and records the data as FBottom BIn the unit of N; with the above-mentioned FBottom AAnd FBottom BThe average value of the measured values is used as the firmness index of opening the shaking cover at the bottom of the measured corrugated case and is recorded as the firmness index of the bottom of the case, and the unit is N;
2) two formed corrugated cases with the same specification as the tested corrugated case are selected again, commodities are loaded into the two formed corrugated cases, and the quality of the corrugated cases is recorded as M0And the quality of the loaded commodity is recorded as M1In units of kg, where M is1Less than or equal to M; sealing the boxes with hot melt adhesive after the commodities are loaded; obtaining two corrugated carton samples with the same quality;
3) placing the sealed corrugated case sample on a workbench, and acquiring tension data of the opened outer rocking cover on one side of the top of one sample by using tension detection equipment, wherein the tension data is recorded as FNoodle AIn the unit of N; another sampleThe product obtains the tension data of opening the outer rocking cover at the other side of the top part in the same way as the above and records the data as FSide BIn the unit of N; with the above-mentioned FNoodle AAnd FSide BThe average value of the measured values is used as a firmness index of opening the top shaking cover of the tested corrugated case and is recorded as a case surface firmness index, and the unit is N;
4) when the box bottom firmness index and the box surface firmness index respectively meet the following formula (1) and formula (2), judging that the hot melt adhesive box sealing firmness of the corrugated carton meets the requirement;
the firmness index of the bottom of the box is more than or equal to (M)0+M1)×9.8/2×110％ (1)；
The firmness index of the box surface is more than or equal to (M)0+M1)×9.8/2×50％ (2)。
In the above method, the tension detecting device is preferably a dynamometer, and may be a conventional device capable of detecting tension, such as a tension meter or a push-pull dynamometer. The dynamometer can be digital display or pointer scale type.
The conventional dynamometer generally includes a housing and a dowel bar, one end of the dowel bar is connected with a spring in the housing, the other end of the dowel bar is usually connected with a hook, and the dowel bar can sense the pulling force or the pressure applied to an object on the hook, so that the applied force can be displayed on a dial or a liquid crystal display on the housing. Since the dynamometer is used in a wide range, it is often applied to different objects to be measured. When testing soft objects (e.g., testing the tensile strength of soft packages such as corrugated cartons), the soft packages are easily deformed and the hooks are relatively thin, and when the hooks are forced against the soft packages, the contact area between the hooks is too small, so that the soft packages are easily deformed and easily slip, which is not conducive to the testing. Therefore, in order to increase the contact area between the hook and the soft package, prevent the soft package and the hook from sliding, and make the force applied by the hook to the soft package more uniform, it is preferable that a support arm is provided at the end of the dowel bar extending out of the housing, and the support arm can be rectangular, bar-shaped or rod-shaped. The supporting arm can be detachably connected (such as in a mode of matching the nut and the measuring head) at the end of the dowel bar extending out of the shell, or fixedly connected (such as welded) at the end of the dowel bar extending out of the shell.
Specifically, when the dynamometer with the structure is used for acquiring tension data of opening one side outer rocking cover (such as the left side outer rocking cover) at the bottom of one tested corrugated case, the supporting arm of the dynamometer can be extended into a gap (namely a gap without spraying hot melt adhesive) of one side outer rocking cover at the bottom of the tested corrugated case, the dynamometer is pulled upwards at a constant speed by vertical upward tension until the side outer rocking cover is opened, and the tension data on the dynamometer is recorded. The other tested corrugated case obtains the tension data for opening the outer rocking cover on the other side of the bottom (if the tension data of the outer rocking cover on the left side of the bottom is measured on the former tested corrugated case, the tension data of the outer rocking cover on the right side of the bottom is measured at the moment). The method of measuring the two side outer flaps on the top of the two samples of corrugated boxes filled with the goods is the same as described above.
Compared with the prior art, the invention provides a method for judging whether the sealing firmness of the hot melt adhesive of the corrugated case meets the requirement. The applicant has statistically determined in long-term tests that the measures for the firmness of the bottom and top of a container according to the invention do not cause bottoming and/or popping of the packaged product of a factory-sold corrugated beer carton during the entire shelf life (12 months) when the measures satisfy the formula (1) and the formula (2), respectively, thereby avoiding the quality of the beer product and the image of the producer from being affected by the occurrence of bottoming and/or popping of the corrugated carton during the beer sales process.
Drawings
Fig. 1 is a schematic diagram of the structure of a load cell used in the method of the present invention.
The reference numbers in the figures are:
1, pulling a ring; 2, a shell; 3, a spring; 4 supporting the arm; 5 a dowel bar; 6, a chute.
Detailed Description
The present invention will be better understood from the following detailed description of specific examples, which should not be construed as limiting the scope of the present invention.
The dynamometer shown in fig. 1 comprises a shell 2 and a dowel bar 5, wherein the top end part of the shell 2 is provided with a pull ring 1, scales of the size of marking force are arranged on the periphery of the shell 2, a chute 6 is arranged in the shell 2, a spring 3 is arranged in the chute 6 and can freely stretch in the chute 6, one end of the spring 3 is fixed on the top end of the shell 2, the other end of the spring is fixedly connected with one end of the dowel bar 5, the other end of the dowel bar 5 extends out of the bottom of the shell 2, and a rectangular support arm 4 is fixedly connected with the end of the dowel bar 5, which extends out of the bottom of the shell 2.
Example 1: the determination method of the invention is as follows:
1) selecting two formed tested corrugated cases with the same specification, and obtaining the design value of the weight which can be borne by the two tested corrugated cases, wherein the design value is recorded as M and the unit is kg; placing the corrugated case to be tested on a workbench in a mode that the bottom of the corrugated case faces upwards, using a dynamometer with a structure shown in figure 1 as tension detection equipment for measuring the opening of an outer rocking cover at the bottom of the corrugated case to be tested, extending a supporting arm of the dynamometer into a gap (namely a gap without spraying hot melt adhesive) of one side outer rocking cover (such as a left side outer rocking cover) at the bottom of the corrugated case to be tested, pulling the dynamometer upwards at a constant speed by vertical upward tension until the side outer rocking cover is opened, recording tension data on the dynamometer, and recording the tension data as FBottom AIn the unit of N; the other tested corrugated case obtains the pulling force data for opening the outer rocking cover on the other side of the bottom (here, the outer rocking cover on the right side of the bottom of the tested corrugated case) by adopting the method, and the pulling force data is recorded as FBottom BIn the unit of N; with the above-mentioned FBottom AAnd FBottom BThe average value of the measured values is used as the firmness index of opening the shaking cover at the bottom of the measured corrugated case and is recorded as the firmness index of the bottom of the case, and the unit is N;
2) two formed corrugated cases with the same specification as the tested corrugated case are selected again, commodities are loaded into the two formed corrugated cases, and the quality of the corrugated cases is recorded as M0And the quality of the loaded commodity is recorded as M1In units of kg, where M is1Less than or equal to M; sealing the boxes with hot melt adhesive after the commodities are loaded; obtaining two corrugated carton samples with the same quality;
3) the sealed corrugated cardboard box sample was set on a table, and a load cell having the structure shown in FIG. 1 was used as a testDetermining the tensile force detection equipment for opening the outer rocking cover at the top of the tested corrugated case, wherein the detection method is the same as the step 1), and respectively obtaining the tensile force data for opening the left outer rocking cover and the right outer rocking cover at the top of the tested corrugated case, which are respectively marked as FNoodle AAnd FSide BThe units are N; with the above-mentioned FNoodle AAnd FSide BThe average value of the measured values is used as a firmness index of opening the top shaking cover of the tested corrugated case and is recorded as a case surface firmness index, and the unit is N;
4) when the box bottom firmness index and the box surface firmness index respectively meet the following formula (1) and formula (2), judging that the hot melt adhesive box sealing firmness of the corrugated carton meets the requirement;
the firmness index of the bottom of the box is more than or equal to (M)0+M1)×9.8/2×110％ (1)；
The firmness index of the box surface is more than or equal to (M)0+M1)×9.8/2×50％ (2)。
Example 2: the firmness of a packaged beer corrugated box at the production site a of the applicant of the present invention was determined by the method described in example 1, and the data and calculation results obtained at the time of detection are shown in table 1 below:
table 1:
under the control of the index, the applicant's production base a sold 2500 thousands of hot melt adhesive corrugated cartons (each containing 600ml of 12 bottles of beer) per year, and the finished sealed corrugated cartons do not receive market feedback within 12 months of shelf life, thereby promoting the overall quality of beer and the image of enterprises.
Example 3: the firmness of a packaged beer corrugated cardboard box at the production site a of the applicant of the present invention was determined by the method described in example 1, and the data and calculation results obtained at the time of detection are shown in table 2 below:
table 2:
under the control of the index, the applicant's production base a sold 3000 thousands (330 ml of beer per 24 cans) of hot melt adhesive corrugated cardboard boxes per year, and the finished product sealed in the corrugated cardboard boxes did not receive market feedback within 12 months of shelf life, thereby improving the overall quality of beer and the image of an enterprise.
Claims (4)
1. A method for judging whether the sealing firmness of a hot melt adhesive for a corrugated case meets the requirement is characterized by comprising the following steps:
1) selecting two formed tested corrugated cases with the same specification, and obtaining the design value of the weight which can be borne by the two tested corrugated cases, wherein the design value is recorded as M and the unit is kg; placing the corrugated case to be tested on a workbench in a mode that the bottom of the corrugated case faces upwards, and acquiring tension data of opening one side of the outer rocking cover at the bottom of one corrugated case to be tested by using tension detection equipment, wherein the tension data is recorded as FBottom AIn the unit of N; the other tested corrugated case adopts the method to obtain the tension data for opening the outer rocking cover at the other side of the bottom and records the data as FBottom BIn the unit of N; with the above-mentioned FBottom AAnd FBottom BThe average value of the measured values is used as the firmness index of opening the shaking cover at the bottom of the measured corrugated case and is recorded as the firmness index of the bottom of the case, and the unit is N;
2) two formed corrugated cases with the same specification as the tested corrugated case are selected again, commodities are loaded into the two formed corrugated cases, and the quality of the corrugated cases is recorded as M0And the quality of the loaded commodity is recorded as M1In units of kg, where M is1Less than or equal to M; sealing the boxes with hot melt adhesive after the commodities are loaded; obtaining two corrugated carton samples with the same quality;
3) placing the sealed corrugated case sample on a workbench, and acquiring tension data of the opened outer rocking cover on one side of the top of one sample by using tension detection equipment, wherein the tension data is recorded as FNoodle AIn the unit of N; another sample was subjected to the same procedure as described above to obtain the data of the tension applied to the top of the sample, which is denoted as FSide BIn the unit of N; with the above-mentioned FNoodle AAnd FSide BAs an average value for opening a flap at the top of the corrugated box under testThe firmness index is recorded as the surface firmness index of the box, and the unit is N;
4) when the box bottom firmness index and the box surface firmness index respectively meet the following formula (1) and formula (2), judging that the hot melt adhesive box sealing firmness of the corrugated carton meets the requirement;
the firmness index of the bottom of the box is more than or equal to (M)0+M1)×9.8/2×110％ (1)；
The firmness index of the box surface is more than or equal to (M)0+M1)×9.8/2×50％ (2)。
2. The method of claim 1, wherein: the tension detection equipment is a dynamometer.
3. The method of claim 2, wherein: the dynamometer include casing (2) and dowel steel (5), the one end of dowel steel (5) is connected with spring (3) in casing (2), its other end stretches out outside casing (2) and is provided with support arm (4) in end department.
4. The method of claim 3, wherein: the supporting arm (4) is detachably connected or fixedly connected with the end head of one end of the dowel bar (5) extending out of the shell (2).
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| CN109878825B (en) * | 2019-03-25 | 2020-11-20 | 烟台三新新能源科技有限公司 | Automatic quality control machine of carton banding for packing |
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