CN107781335B - Elastomer for asymmetrically indicating pressure - Google Patents

Elastomer for asymmetrically indicating pressure Download PDF

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Publication number
CN107781335B
CN107781335B CN201711252113.0A CN201711252113A CN107781335B CN 107781335 B CN107781335 B CN 107781335B CN 201711252113 A CN201711252113 A CN 201711252113A CN 107781335 B CN107781335 B CN 107781335B
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pressure
indicating
line
layer
pressure indicating
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CN107781335A (en
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李芬
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Tongxiang Yizhi Jianneng Information Technology Co ltd
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Tongxiang Yizhi Jianneng Information Technology Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/04—Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • F16F2224/025—Elastomers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0047—Measuring, indicating

Abstract

The invention relates to the technical field of elastomers, in particular to an elastomer for asymmetrically indicating pressure. The elastomer comprises an elastic main body and an indicating layer; the elastic main body is provided with the indicating layer outward, is close to a side edge position on the length direction on indicating layer and sets up fixed baseline, and it is fixed with the elastic main body to indicate the layer in fixed baseline position, makes it not take place holistic relative displacement, and the elastic main body can take place relative displacement with the indicating layer of fixed baseline outside. On the elastic main body, a fixed base line is taken as a guideline, a zero pressure indicating line is arranged towards the direction of the edge position on the other side in the length direction of the indicating layer, and the zero pressure indicating line is superposed with the edge line of the edge position on the other side in the length direction of the indicating layer; and a plurality of pressure indicating lines are sequentially arranged on the indicating layer from the edge position of the other side of the indicating layer in the length direction to the direction of the fixed baseline. Compared with the conventional elastomer, the elastomer has the advantages of capability of indicating the pressure, convenience in production, simplicity, reliability and the like.

Description

Elastomer for asymmetrically indicating pressure
Technical Field
The invention relates to the technical field of elastomers, in particular to an elastomer for asymmetrically indicating pressure.
Background
In a textile mill, cotton bale plucking, opening and other processes are required; and the subsequent processes of blowing, carding, drawing, roving, spinning, spooling and the like. After the fibers are formed into yarn, the spun yarn needs to be woven into a raw fabric by a knitting apparatus or a weaving apparatus. And the subsequent steps of finishing the grey cloth, such as dyeing, ironing and shaping, and the like. The finished fabric is then cut to produce various goods such as garments. In these processes, a large number of machines are used, and some of the machines are elastic bodies, and during the installation of the elastic bodies, a predetermined pressure is applied to the elastic bodies to compress the elastic bodies, thereby generating a rebound force to the parts in contact therewith. For example, in some fields, it is necessary to use an elastic body such as a spring and fix the elastic body in a certain space by applying a predetermined pressure to the elastic body. However, since the elastomer itself cannot indicate the amount of pressure applied, it is necessary to measure the applied pressure with the aid of a compact instrument, thereby determining the resulting rebound force on the elastomer. However, due to the limitation of the use space or environment, the pressure measuring instrument has a large volume, and the measurement is inconvenient in practical use. For example, an elastic body required to generate a predetermined repulsive force is installed in a narrow space that cannot be measured by an instrument for measuring pressure. Then, how to accurately apply the predetermined pressure to the elastic body becomes a troublesome problem. Meanwhile, the measuring instrument is expensive and is easy to lose during operation, which results in property loss.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an elastomer for asymmetrically indicating pressure and a preparation method thereof, wherein the pressure is directly indicated by observing the compression degree of the elastomer in the process of applying pressure to the elastomer.
The technical scheme adopted by the invention for realizing the purpose is as follows: an asymmetric pressure indicating elastomer comprising an elastomeric body and an indicating layer; the method is characterized in that: an indicating layer is arranged outside the elastic main body, a fixed base line is arranged at a position close to the edge of one side in the length direction of the indicating layer, the indicating layer and the elastic main body are fixed at the position of the fixed base line so as not to generate integral relative displacement, and the elastic main body can generate relative displacement with the indicating layer outside the fixed base line; on the elastic main body, a fixed base line is taken as a guideline, a zero pressure indicating line is arranged towards the direction of the edge position on the other side in the length direction of the indicating layer, and the zero pressure indicating line is superposed with the edge line of the edge position on the other side in the length direction of the indicating layer; on the indicating layer, a first pressure indicating line, a second pressure indicating line, a third pressure indicating line and a fourth pressure indicating line are sequentially arranged from the edge position of the other side of the indicating layer in the length direction to the direction of the fixed baseline; the first pressure indicating line, the second pressure indicating line, the third pressure indicating line and the fourth pressure indicating line are all positioned between the zero pressure indicating line and the fixed baseline; the indicating layer is made of transparent material.
Preferably, the indication layer is arranged around the elastic body, so that a worker can conveniently observe the stress condition of the elastic body from various angles.
Preferably, a coating layer can be arranged outside the elastic main body, and the coating layer can be made of rubber or other materials. This is primarily the case with elastomers that do not provide a zero pressure indicator line for convenience of some surface irregularities or for other reasons. However, in order to indicate the pressure more accurately, the coating layer is not provided as much as possible, so that the pressure indication error caused by the difference between the material of the coating layer and the material of the elastic body is avoided. Of course, if the elastic main body is externally provided with the coating layer and the zero pressure indicating line is arranged on the coating layer, the indicating layer is arranged outside the coating layer, the indicating layer and the coating layer are mutually fixed by taking the fixed base line as a reference line, the whole displacement does not occur between the coating layer and the indicating layer, but the relative displacement can occur between the coating layer and the indicating layer except for the area where the fixed base line is fixed. Thus, the corresponding descriptive terms in the method of determining the position of the pressure indicating line described below can be adjusted accordingly, but the method per se is unchanged.
Preferably, the fourth pressure indicating line, the third pressure indicating line, the second pressure indicating line, the first pressure indicating line and the zero pressure indicating line are different colors so as to visually distinguish the pressure magnitudes; further preferably, the fourth pressure indicating line is black, the third pressure indicating line is red, the second pressure indicating line is orange, the first pressure indicating line is yellow, and the zero pressure indicating line is blue.
Preferably, the fourth pressure indicating line is an elastomer maximum compression safety value indicating line; the third pressure indicating line is an 80% elastomer maximum compression safety value indicating line, the second pressure indicating line is a 50% elastomer maximum compression safety value indicating line, the first pressure indicating line is a 20% elastomer maximum compression safety value indicating line, the zero pressure indicating line is an indicating line when the pressure is zero, and the zero pressure indicating line is flush with an edge line of the edge position of the other side of the indicating layer in the length direction. Under the action of pressure, when a zero-pressure indicating line displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a first pressure indicating line on the transparent indicating layer, the pressure value borne by the elastic body for indicating the asymmetric indicating pressure is the first pressure; under the action of pressure, when a zero-pressure indicating line displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a second pressure indicating line on the transparent indicating layer, the pressure value borne by the elastic body for indicating the asymmetric indicating pressure is the second pressure; under the action of pressure, when a zero-pressure indicating line displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a third pressure indicating line on the transparent indicating layer, the pressure value borne by the elastic body for indicating the asymmetric indicating pressure is the third pressure; under the action of pressure, when the zero-pressure indicating line displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a fourth pressure indicating line on the transparent indicating layer, the pressure value borne by the elastic body for indicating the asymmetric indicating pressure is the fourth pressure.
Preferably, a plurality of pressure indicating lines representing different pressure magnitudes can be selectively arranged according to actual needs, and more preferably, the plurality of pressure indicating lines are directly arranged in a scale mode, so that the pressure borne by the elastic body can be directly read.
The position of each pressure indicating line on the indicating layer and the position of a zero pressure indicating line on the elastic main body are determined by the following method, and the specific steps are as follows:
1) selecting an elastic main body for preparing an elastomer for asymmetric pressure indication; cutting the test section into test sections with different lengths of 15-20;
2) taking 4 test sections with the same length at each length, and performing compression test on the test sections at a set compression speed by adopting a universal material testing machine; recording a relation curve and data of the compression load and the length of the test segment;
3) analyzing and calculating the relation curve of the compression load and the length of the test section obtained in the step 2) and the data by adopting mathematical analysis software to obtain a compression load-compression ratio curve of the test section, and fitting a mathematical formula of the relation of the compression load and the compression ratio;
4) first pressure F of test section1A second pressure F2A third pressure F3Fourth pressure F4Respectively substituting into the mathematical formula of the compression load-compression ratio relationship obtained in the step 3) to obtain the compression ratio X of the test section corresponding to the pressure1、X2、X3、X4；
5) Selecting an indicating layer with a certain length, defining a zero pressure indicating line on the elastic main body, enabling the zero pressure indicating line to be superposed with the edge line of the other end edge of the indicating layer in the length direction, and fixing a base line and the zero pressure indicating lineThe distance between the fourth pressure indicating line and the zero pressure indicating line is L4The distance between the third pressure indicating line and the zero pressure indicating line is L3The distance between the second pressure indicating line and the zero pressure indicating line is L2The distance between the first pressure indicating line and the zero pressure indicating line is L1(ii) a According to L-L4=(1-X4) xL, namely the distance between the fourth pressure indicating line and the fixed base line in the elastic body for asymmetrically indicating the pressure is equal to the length of the area between the zero pressure indicating line and the fixed base line after being compressed under the action of the fourth pressure, and L is obtained by calculation4=LX4In the same way, L3=LX3; L2=LX2，L1=LX1。
Further, the fourth pressure indication line is selected to be black, the third pressure indication line is selected to be red, the second pressure indication line is selected to be orange, the first pressure indication line is selected to be yellow, and the zero pressure indication line is blue. When the asymmetric pressure indicating elastomer is uncompressed, a zero pressure indicating line on the asymmetric pressure indicating elastomer coincides with an edge line of the other end edge in the length direction of the indicating layer. When the first yellow pressure indicating line on the indicating layer is coincident with the zero pressure indicating line on the elastic body when the elastic body for asymmetrically indicating the pressure is in a compressed state, the pressure of the elastic body is represented as a first pressure F1Similarly, when the orange second pressure indicating line on the indicating layer is superposed with the zero pressure indicating line on the elastic body in the compressed state of the asymmetric pressure indicating elastic body, the pressure of the elastic body is represented as a second pressure F2(ii) a When the red third pressure indicating line on the indicating layer is coincident with the zero pressure indicating line on the elastic body when the elastic body for asymmetrically indicating the pressure is in a compressed state, the pressure of the elastic body is represented as a third pressure F3. When the black fourth pressure indicating line on the indicating layer is coincident with the zero pressure indicating line on the elastic body when the elastic body for asymmetrically indicating the pressure is in a compressed state, the pressure of the elastic body is represented as a fourth pressure F4. If the fourth pressure is selected as the maximum compression safety value of the elastic body, when the elastic body of the asymmetric pressure indication is at the maximum compression safety valueWhen the zero pressure indicating line on the elastic body is positioned between the third pressure indicating line and the fourth pressure indicating line of the indicating layer in the compressed state, the fact that the pressure borne by the elastic body is close to the maximum compression safety value means that larger pressure can not be applied to the elastic body any more.
Further, a preparation method of the asymmetric pressure-indicating elastomer is provided, which comprises the following steps:
1) selecting an elastic main body and a transparent indicating layer with a certain length, and determining a fixed base line close to one side edge in the length direction of the indicating layer;
2) fixing the indicating layer and the elastic main body by taking the fixing base line as a reference line so that the indicating layer and the elastic main body do not generate overall relative displacement, but the elastic main body can generate relative displacement with the indicating layer outside the fixing base line;
3) marking a zero-pressure indicating line on the elastic main body by taking an edge line at the edge position of the other side of the indicating layer in the length direction as a reference, so that the zero-pressure indicating line is superposed with the edge line of the other side of the indicating layer in the length direction, and the distance between the zero-pressure indicating line and the fixed base line is L;
4) on the indicating layer, a first pressure indicating line, a second pressure indicating line, a third pressure indicating line and a fourth pressure indicating line are sequentially arranged from the edge position of the other side of the indicating layer in the length direction to the direction of the fixed baseline; the first pressure indicating line, the second pressure indicating line, the third pressure indicating line and the fourth pressure indicating line are all positioned between the zero pressure indicating line and the fixed baseline; thereby resulting in an asymmetric pressure indicating elastomer.
The invention has the beneficial effects that:
the invention has the beneficial effects that: the invention provides an asymmetric pressure indicating elastomer and a preparation method thereof. This enables a predetermined pressure to be applied to the elastomer during compression of the elastomer without the use of pressure testing equipment. The device is simple and reliable, avoids a worker from carrying equipment such as a precise pressure tester during operation, and also avoids the situation that the pressure tester cannot test pressure conveniently and cannot apply preset pressure precisely when the elastomer is installed in some narrow spaces.
For example, when such an elastic body for asymmetrically indicating pressure is installed in a narrow space, the first pressure is set to a desired predetermined pressure value, and pressure is applied to such an elastic body for asymmetrically indicating pressure during construction work, and when the zero pressure indicating line is displaced in the longitudinal direction of the elastic body by the action of pressure and coincides with the first pressure indicating line on the transparent indicating layer, the pressure applied to the elastic body can be determined to be the predetermined pressure value. The pressure tester is convenient for workers to construct, does not need to carry a precise pressure tester, does not need to worry about losing the pressure tester during operation, and avoids property loss. Similarly, a second pressure indicating line, a third pressure indicating line and the like are arranged, so that a worker can conveniently select the preset tension to be applied according to actual needs. More preferably, the plurality of pressure indicating lines are provided directly in the form of a graduated scale facilitating direct reading of the pressure experienced on the resilient body. The setting mode of asymmetric indicator pressure can reduce the length of display layer, and the installation of being convenient for, and can practice thrift the material of display layer.
Drawings
Fig. 1 is a schematic view showing the overall structure of an asymmetric pressure indicating elastic body according to the present invention.
Reference numerals:
1. an elastic body; 2. an indicator layer; A. a zero pressure indicator line; B. a first pressure indicating line; C. a second pressure indicating line; D. a third pressure indicating line; E. a fourth pressure indicating line; F. the baseline is fixed.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings.
An asymmetric pressure indicating elastomer comprises an elastic body 1 and an indicating layer 2; the method is characterized in that: an indicating layer 2 is arranged outside the elastic main body 1, a fixed base line F is arranged at a position close to one side edge in the length direction of the indicating layer 2, the indicating layer 2 and the elastic main body 1 are fixed at the position of the fixed base line F, so that the indicating layer 2 and the elastic main body 1 do not generate integral relative displacement, and the elastic main body 1 can generate relative displacement with the indicating layer 2 except the fixed base line F; on the elastic main body 1, a zero pressure indicating line A is arranged towards the edge position of the other side in the length direction of the indicating layer 2 by taking the fixed base line F as a reference line, and the zero pressure indicating line A is superposed with the edge line of the edge position of the other side in the length direction of the indicating layer 2; on the indicating layer 2, a first pressure indicating line B, a second pressure indicating line C, a third pressure indicating line D and a fourth pressure indicating line E are sequentially arranged from the edge position of the other side of the indicating layer 2 in the length direction to the direction of the fixed base line F; a first pressure indicating line B, a second pressure indicating line C, a third pressure indicating line D and a fourth pressure indicating line E are all located between the zero pressure indicating line a and the fixed baseline F; the indication layer 2 is made of transparent material.
Preferably, the indication layer 2 is arranged around the elastic body 1, so that a worker can conveniently observe the stress condition of the elastic body from various angles.
Preferably, a covering layer may be disposed outside the elastic body 1, and the covering layer may be made of rubber or other materials. This is primarily for the purpose of facilitating some surface irregularities or elastomers that otherwise would not be convenient for the zero pressure indicator line a. However, in order to indicate the pressure more accurately, the coating layer is not provided as much as possible, so that the pressure indication error caused by the difference between the material of the coating layer and the material of the elastic body is avoided. Of course, if the elastic body 1 is externally provided with a coating layer and the zero pressure indicating line a is arranged on the coating layer, the indicating layer 2 is arranged outside the coating layer, the indicating layer 2 and the coating layer are mutually fixed by taking the fixed base line F as a reference line, and the coating layer and the indicating layer 2 are not displaced integrally, but the coating layer and the indicating layer 2 can be displaced relatively in a region except for a region where the fixed base line F is fixed. Thus, the corresponding descriptive terms in the method of determining the position of the pressure indicating line described below can be adjusted accordingly, but the method per se is unchanged.
Preferably, the fourth pressure indicating line E, the third pressure indicating line D, the second pressure indicating line C, the first pressure indicating line B and the zero pressure indicating line a are different colors so as to visually distinguish the pressure magnitudes; it is further preferred that the fourth pressure indicating line E is black, the third pressure indicating line D is red, the second pressure indicating line C is orange, the first pressure indicating line B is yellow and the zero pressure indicating line a is blue.
Preferably, the fourth pressure indicating line E is an elastomer maximum compression safety value indicating line; the third pressure indicating line D is an 80% elastomer maximum compression safety value indicating line, the second pressure indicating line C is a 50% elastomer maximum compression safety value indicating line, the first pressure indicating line B is a 20% elastomer maximum compression safety value indicating line, the zero pressure indicating line A is an indicating line when the pressure is zero, and the zero pressure indicating line A is flush with an edge line of the edge position of the other side of the indicating layer 2 in the length direction. Under the action of pressure, when a zero-pressure indicating line A displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a first pressure indicating line B on the transparent indicating layer 2, the pressure value borne by the elastic body for indicating the asymmetric indicating pressure is the first pressure; under the action of pressure, when a zero-pressure indicating line A displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a second pressure indicating line C on the transparent indicating layer 2, the pressure value borne by the elastic body for indicating the asymmetric indicating pressure is the second pressure; under the action of pressure, when a zero-pressure indicating line A displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a third pressure indicating line D on the transparent indicating layer 2, the pressure value borne by the elastic body for indicating the asymmetric indicating pressure is the third pressure; under the action of pressure, when the zero-pressure indicating line A displaces along the length direction of the elastic body along with the action of the pressure and is superposed with a fourth pressure indicating line E on the transparent indicating layer 2, the pressure value born on the elastic body representing the asymmetric indicating pressure is the fourth pressure.
Preferably, a plurality of pressure indicating lines representing different pressure magnitudes can be selectively arranged according to actual needs, and more preferably, the plurality of pressure indicating lines are directly arranged in a scale mode, so that the pressure borne by the elastic body can be directly read.
The position of each pressure indication line on the indication layer 2 and the position of the zero pressure indication line A on the elastic body 1 are determined by the following method, and the specific steps are as follows:
1) selecting an elastic main body 1 for preparing an elastomer for asymmetric pressure indication; cutting the test section into test sections with different lengths of 15-20;
2) taking 4 test sections with the same length at each length, and performing compression test on the test sections at a set compression speed by adopting a universal material testing machine; recording a relation curve and data of the compression load and the length of the test segment;
3) analyzing and calculating the relation curve of the compression load and the length of the test section obtained in the step 2) and the data by adopting mathematical analysis software to obtain a compression load-compression ratio curve of the test section, and fitting a mathematical formula of the relation of the compression load and the compression ratio;
4) first pressure F of test section1A second pressure F2A third pressure F3Fourth pressure F4Respectively substituting into the mathematical formula of the compression load-compression ratio relationship obtained in the step 3) to obtain the compression ratio X of the test section corresponding to the pressure1、X2、X3、X4；
5) Selecting an indicating layer 2 with a certain length, defining a zero pressure indicating line A on the elastic main body 1, enabling the zero pressure indicating line A to be superposed with the edge line of the other end edge of the indicating layer 2 in the length direction, setting the distance between a fixed base line F and the zero pressure indicating line A to be L, and setting the distance between a fourth pressure indicating line E and the zero pressure indicating line A to be L4The distance between the third pressure indicating line D and the zero pressure indicating line A is L3The distance between the second pressure indicating line C and the zero pressure indicating line A is L2The distance between the first pressure indicating line B and the zero pressure indicating line A is L1(ii) a According to L-L4=(1-X4) xL, namely the distance between a fourth pressure indicating line E and a fixed base line F in the elastic body for asymmetrically indicating the pressure is equal to the length of a region between a zero pressure indicating line A and the fixed base line F after being compressed under the action of fourth pressure, and L is obtained by calculation4=LX4In the same way, L3=LX3; L2=LX2，L1=LX1。
Further, a fourth pressure indicating line E is selected to be black, a third pressure indicating line D is selected to be red, a second pressure indicating line C is selected to be orange, a first pressure indicating line B is selected to be yellow, and a zero pressure indicating line a is blue. When the asymmetric pressure indicating elastic body is not compressed, the zero pressure indicating line a on the asymmetric pressure indicating elastic body coincides with the edge line of the other end edge in the length direction of the indicating layer 2. When the first yellow pressure indicating line B on the indicating layer 2 is coincident with the zero pressure indicating line A on the elastic body 1 in the compressed state of the asymmetric pressure indicating elastic body, the pressure of the elastic body is represented as a first pressure F1Similarly, when the orange second pressure indicating line C on the indicating layer 2 is superposed with the zero pressure indicating line A on the elastic body 1 in the compressed state of the elastic body for asymmetrically indicating the pressure, the pressure of the elastic body is indicated as a second pressure F2(ii) a When the red third pressure indicating line D on the indicating layer 2 is coincident with the zero pressure indicating line A on the elastic body 1 in the compressed state of the elastic body for asymmetrically indicating the pressure, the pressure of the elastic body is represented as a third pressure F3. When the black fourth pressure indicating line E on the indicating layer 2 is coincident with the zero pressure indicating line A on the elastic body 1 in the compressed state of the elastic body for asymmetrically indicating the pressure, the pressure of the elastic body is indicated as a fourth pressure F4. If the fourth pressure is selected as the maximum compression safety value of the elastic body, when the asymmetric pressure indicating elastic body is in a compressed state, and the zero pressure indicating line a on the elastic body 1 is located between the third pressure indicating line D and the fourth pressure indicating line E of the indicating layer 2, it indicates that the pressure applied to the elastic body is close to the maximum compression safety value, and no more pressure can be applied to the elastic body.
Further, a preparation method of the asymmetric pressure-indicating elastomer is provided, which comprises the following steps:
1) selecting an elastic main body 1 and a transparent indicating layer 2 with a certain length, and determining a fixed base line F close to one side edge in the length direction of the indicating layer 2;
2) fixing the indicating layer 2 and the elastic body 1 with the fixed base line F as a reference line so that the indicating layer and the elastic body 1 do not generate overall relative displacement, but the elastic body 1 can generate relative displacement with the indicating layer 2 except the fixed base line F;
3) marking a zero-pressure indicating line A on the elastic main body 1 by taking an edge line at the edge position of the other side of the indicating layer 2 in the length direction as a reference, so that the zero-pressure indicating line A is superposed with the edge line at the edge position of the other side of the indicating layer 2 in the length direction, and the distance between the zero-pressure indicating line A and a fixed base line F is L;
4) on the indicating layer 2, a first pressure indicating line B, a second pressure indicating line C, a third pressure indicating line D and a fourth pressure indicating line E are sequentially arranged from the edge position of the other side of the indicating layer 2 in the length direction to the direction of a fixed base line F; a first pressure indicating line B, a second pressure indicating line C, a third pressure indicating line D and a fourth pressure indicating line E are all located between the zero pressure indicating line a and the fixed baseline F; thereby resulting in an asymmetric pressure indicating elastomer.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (4)

1. An asymmetric pressure indicating elastomer comprising an elastomeric body and an indicating layer; the method is characterized in that: the indicating layer is arranged outside the elastic body, a fixed base line is arranged at a position close to one side edge in the length direction of the indicating layer, the indicating layer and the elastic body are fixed at the position of the fixed base line so as not to generate overall relative displacement, and the elastic body can generate relative displacement with the indicating layer at the part outside the fixed base line; on the elastic main body, a zero pressure indicating line is arranged in the direction of the edge position on the other side in the length direction of the indicating layer by taking the fixed base line as a reference line, and the zero pressure indicating line is superposed with the edge line of the edge position on the other side in the length direction of the indicating layer; a first pressure indicating line, a second pressure indicating line, a third pressure indicating line and a fourth pressure indicating line are sequentially arranged on the indicating layer from the edge position of the other side of the indicating layer in the length direction to the direction of the fixed baseline; the first, second, third and fourth pressure indicating lines are all located between the zero pressure indicating line and the fixed baseline; the indicating layer is made of transparent materials;
the position of each pressure indicating line on the indicating layer and the position of a zero pressure indicating line on the elastic main body are determined by the following method, and the specific steps are as follows:
1) selecting an elastic main body for preparing an elastomer for asymmetric pressure indication; cutting the test section into test sections with different lengths of 15-20;
2) taking 4 test sections with the same length at each length, and performing compression test on the test sections at a set compression speed by adopting a universal material testing machine; recording a relation curve and data of the compression load and the length of the test segment;
3) analyzing and calculating the relation curve of the compression load and the length of the test section obtained in the step 2) and the data by adopting mathematical analysis software to obtain a compression load-compression ratio curve of the test section, and fitting a mathematical formula of the relation of the compression load and the compression ratio;
4) first pressure F of test section1A second pressure F2A third pressure F3Fourth pressure F4Respectively substituting into the mathematical formula of the compression load-compression ratio relationship obtained in the step 3) to obtain the compression ratio X of the test section corresponding to the pressure1、X2、X3、X4；
5) Selecting an indicating layer with a certain length, dividing a zero pressure indicating line on the elastic main body, enabling the zero pressure indicating line to be superposed with the edge line of the other end edge of the indicating layer in the length direction, setting the distance between the fixed base line and the zero pressure indicating line to be L, and setting the distance between the fourth pressure indicating line and the zero pressure indicating line to be L4The distance between the third pressure indicating line and the zero pressure indicating line is L3A second pressure indication line and zero pressureDistance of the indicator line is L2The distance between the first pressure indicating line and the zero pressure indicating line is L1(ii) a According to L-L4=(1-X4) xL, namely the distance between the fourth pressure indicating line and the fixed base line in the elastic body for asymmetrically indicating the pressure is equal to the length of the area between the zero pressure indicating line and the fixed base line after being compressed under the action of the fourth pressure, and L is obtained by calculation4=LX4In the same way, L3=LX3; L2=LX2，L1=LX1。
2. The asymmetric pressure indicating elastomer of claim 1 wherein: a coating layer is arranged between the elastic main body and the indicating layer.
3. The asymmetric pressure indicating elastomer of claim 2 wherein: the coating layer is made of rubber.
4. The asymmetric pressure indicating elastomer of claim 1 wherein: the fourth pressure indicating line is black, the third pressure indicating line is red, the second pressure indicating line is orange, the first pressure indicating line is yellow, and the zero pressure indicating line is blue.
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CN107781336A (en) * 2017-12-03 2018-03-09 桐乡市易知简能信息技术有限公司 A kind of method for producing elastomers of asymmetric instruction pressure

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