CN211206076U - Instrument for measuring bending creep resistance of hard plastic - Google Patents
Instrument for measuring bending creep resistance of hard plastic Download PDFInfo
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- CN211206076U CN211206076U CN201922188498.XU CN201922188498U CN211206076U CN 211206076 U CN211206076 U CN 211206076U CN 201922188498 U CN201922188498 U CN 201922188498U CN 211206076 U CN211206076 U CN 211206076U
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Abstract
The utility model discloses a measure instrument of rigid plastic bending creep resistance, including bed plate, support riser, support connecting rod, amesdial, weight, pipe, the first depression bar of T shape, sample bracing piece, the first depression bar of T shape passes the pipe, the lower part pressure of the first depression bar of T shape is on rigid plastic sample strip, the weight is placed in the first depression bar upper end of T shape, measures the bending creep resistance that rigid plastic is surveyed to the upper and lower displacement of weight and the first depression bar of T shape through the amesdial. The utility model discloses can accurate measurement stereoplasm plastics the bending creep resistance can, need not power consumptive, simple structure is small and exquisite, simple in design and make simple, convenient to use, easily operation in long-time measurement process, be favorable to using widely.
Description
Technical Field
The utility model belongs to the technical field of the capability test of material, specifically relate to an instrument of measurement rigid plastic bending creep resistance performance.
Background
When the plastic product is used, under the action of a stress, the shape and the size of the plastic product are changed due to creep deformation caused by the movement and the slippage of macromolecular chains in the plastic product, so that the service life of the plastic product is shortened. The creep resistance of the plastic can be measured by measuring the tensile creep amount of the plastic sample strip under the action of tensile stress and measuring the bending creep amount of the plastic sample strip under the action of bending stress.
The creep process of the rigid plastic is very slow under the action of stress, the creep amount of the rigid plastic usually needs to be measured for a long time, sometimes days or even months, and the current instruments for measuring the tensile and bending creep properties of the plastic on the market have the defects of long time consumption, complex structure, high manufacturing cost and the like. Therefore, there is a need to develop an instrument that can accurately measure the bending creep resistance of rigid plastics without consuming electricity during long-term measurement.
In the case of hard plastics, the plastic is hard and not easy to creep, and when the plastic is stressed, the creep deformation amount in a certain time is small, and the small tensile creep deformation amount is difficult to accurately measure. The dial gauge can well measure the tiny dimension distance. A dial gauge is a commercially available displacement measuring instrument that converts a generally linear displacement into a rotational movement of a pointer through a gear or a lever, and then performs a reading on a dial. The existing instruments for measuring the tensile and bending creep properties of plastics on the market have the defects of complex structure, high manufacturing cost and the like. Therefore, there is also a need to design and develop an instrument which has a reasonable structure, is simple to manufacture, is convenient to use and can accurately measure the bending creep resistance of the hard plastic.
Disclosure of Invention
An object of the utility model is to overcome not enough among the above-mentioned prior art, provide an instrument for measuring rigid plastic bending creep resistance, its simple structure, reasonable in design and make simple, low in manufacturing cost, can effectually survey rigid plastic's bending creep resistance.
In order to achieve the above object, the utility model adopts the following technical scheme: an instrument for measuring the bending creep resistance of hard plastics is characterized in that: the device comprises a base plate, a supporting vertical plate vertically connected to the base plate, a supporting connecting rod connected to the supporting vertical plate, a dial indicator, a weight, a circular tube, a T-shaped head pressure rod and a sample supporting rod; one end of the sample supporting rod is connected to the supporting vertical plate; the sample supporting rods are supported at two ends of the bottom of the rigid plastic sample strip and play a role in supporting the rigid plastic sample strip placed on the sample supporting rods; the T-shaped head of the T-shaped head pressing rod is pressed on the middle part of the upper surface of the rigid plastic sample strip from top to bottom, and the bending creep resistance of the rigid plastic is measured through the up-down displacement of the T-shaped head pressing rod; the T-shaped head pressure lever penetrates through the circular pipe, and the circular pipe plays a role in guiding the up-and-down movement of the T-shaped head pressure lever; the circular tube is fixed on the supporting vertical plate through the supporting connecting rod; the bottom of the weight is provided with a blind hole with the diameter larger than that of the T-shaped head pressure rod; the upper part of the T-shaped head pressing rod is inserted into the blind hole at the bottom of the weight, so that the weight can be stably placed on the T-shaped head pressing rod; a measuring head at the lower part of the dial indicator is abutted against the top of the weight to measure the vertical displacement of the weight and the T-shaped head pressure rod; the dial indicator is fixed on the supporting vertical plate through the supporting connecting rod.
The instrument for measuring the bending creep resistance of the hard plastic is characterized in that: the weight, the round pipe, the T-shaped head pressing rod and the sample supporting rod are made of metal materials.
Foretell an instrument for measuring bending creep resistance of rigid plastic is when using, places rigid plastic sample strip on the sample bracing piece, down presses the T shape head of T shape head depression bar in the middle part of the upper surface of rigid plastic sample strip from last for the T shape head depression bar pushes down the middle part at the upper surface of rigid plastic sample strip under the action of gravity of weight, and the pipe plays the guide effect to reciprocating of T shape head depression bar, records down the reading of amesdial. After a certain time, the dial indicator is recorded. And according to the reading of the dial indicator when the T-shaped head pressure bar is at the initial position and the reading of the dial indicator after a certain time, the downward movement displacement of the weight and the T-shaped head pressure bar can be obtained. The downward movement displacement is the bending creep deformation of the rigid plastic sample strip measured in the certain time under the pressure action of the weight and the T-shaped head pressure rod. The smaller the bending creep deformation amount of the sample strip of rigid plastic in the certain time, the better the bending creep resistance of the rigid plastic.
Compared with the prior art, the utility model has the following advantage:
1. the utility model adopts the dial indicator to measure the up-and-down displacement of the T-shaped head pressure bar, can accurately measure the bending creep resistance of the hard plastic, and avoids the problem that the hard plastic is difficult to accurately measure because the tensile creep quantity of the hard plastic is small;
2. the T-shaped head pressure rod of the utility model can be taken out from the round tube, and the weights can be taken down from the T-shaped head pressure rod, so that the parts of the bending creep resistance tester provided by the utility model can be disassembled and then put into the packing box, and the structure of the utility model is small and portable, so that the bending creep resistance tester provided by the utility model is convenient to carry;
3. the creep process of the hard plastic is very slow under the action of stress, the measurement of the creep amount of the hard plastic usually needs a long time, sometimes days or even months, and the utility model does not need power consumption in the long-time measurement process of the bending creep resistance of the hard plastic, thereby saving energy;
4. the utility model is convenient to use, easy to test and operate and beneficial to popularization and use;
5. the utility model has the advantages of simple structure and reasonable design, make simply, be favorable to using widely.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Figure 1 is the utility model discloses a bed plate, support riser, support connecting rod, amesdial, weight, pipe, the first depression bar of T shape, the erection joint schematic diagram of sample bracing piece.
Fig. 2 is a perspective view of the weight and the T-shaped head pressing rod of the present invention.
Description of reference numerals:
1-base plate; 2, supporting a vertical plate; 3-a support link; 4-dial indicator; 5, balancing weight;
6-round tube; 7-a T-head compression bar; 8-hard plastic sample strip; 9-sample support bar.
Detailed Description
As shown in fig. 1 and 2, the utility model comprises a base plate 1, a supporting vertical plate 2 vertically connected to the base plate 1, a supporting connecting rod 3 connected to the supporting vertical plate 2, a dial indicator 4, a weight 5, a round tube 6, a T-shaped head pressure bar 7 and a sample supporting rod 9; one end of the sample supporting rod 9 is connected to the supporting vertical plate 2; the sample support rods 9 are supported at two ends of the bottom of the rigid plastic sample strip 8 and play a role in supporting the rigid plastic sample strip 8 placed on the sample support rods; the T-shaped head of the T-shaped head pressing rod 7 is pressed on the middle part of the upper surface of the hard plastic sample strip 8 from top to bottom, and the bending creep resistance of the hard plastic is measured through the up-and-down displacement of the T-shaped head pressing rod 7; the T-shaped head pressure lever 7 penetrates through the circular tube 6, and the circular tube 6 plays a role in guiding the up-and-down movement of the T-shaped head pressure lever 7; the round pipe 6 is fixed on the supporting vertical plate 2 through the supporting connecting rod 3; the bottom of the weight 5 is provided with a blind hole with the diameter larger than that of the T-shaped head pressing rod 7; the upper part of the T-shaped head pressing rod 7 is inserted into a blind hole in the bottom of the weight 5, so that the weight 5 can be stably placed on the T-shaped head pressing rod 7; a measuring head at the lower part of the dial indicator 4 is propped against the top of the weight 5 to measure the vertical displacement of the weight 5 and the T-shaped head pressure rod 7; the dial indicator 4 is fixed on the supporting vertical plate 2 through the supporting connecting rod 3.
In this embodiment, the weight 5, the circular tube 6, the T-shaped head pressing rod 7, and the sample supporting rod 9 are made of metal.
The utility model discloses a theory of operation does: during the use, place stereoplasm plastics sample strip 8 on sample bracing piece 9, down press the middle part at the upper surface of stereoplasm plastics sample strip 8 from last with the T shape head of T shape head depression bar 7 for T shape head depression bar 7 pushes down the middle part at the upper surface of stereoplasm plastics sample strip 8 at the action of gravity of weight 5, and pipe 6 plays the guide effect to reciprocating of T shape head depression bar 7, marks down the reading of amesdial 4. After a certain time, the reading of the dial indicator 4 is recorded. And according to the reading of the dial indicator 4 when the T-shaped head pressing rod 7 is at the initial position and the reading of the dial indicator 4 after a certain time, the downward movement displacement of the weight 5 and the T-shaped head pressing rod 7 can be obtained. The downward movement displacement is the bending creep deformation of the rigid plastic sample strip 8 measured in the certain time under the pressure action of the weight 5 and the T-shaped head pressing rod 7. The smaller the amount of bending creep deformation of the rigid plastic sample strip 8 in this certain period of time, the better the bending creep resistance of the rigid plastic.
Claims (2)
1. An instrument for measuring the bending creep resistance of hard plastics is characterized in that: comprises a base plate (1), a supporting vertical plate (2) vertically connected on the base plate (1), a supporting connecting rod (3) connected on the supporting vertical plate (2), a dial indicator (4), a weight (5), a round tube (6), a T-shaped head pressure lever (7) and a sample supporting rod (9); one end of the sample supporting rod (9) is connected to the supporting vertical plate (2); the sample supporting rods (9) are supported at two ends of the bottom of the rigid plastic sample strip (8) and play a role in supporting the rigid plastic sample strip (8) placed on the sample supporting rods; the T-shaped head of the T-shaped head pressing rod (7) is pressed on the middle part of the upper surface of the rigid plastic sample strip (8) from top to bottom, and the bending creep resistance of the rigid plastic is measured through the up-and-down displacement of the T-shaped head pressing rod (7); the T-shaped head pressing rod (7) penetrates through the circular tube (6), and the circular tube (6) plays a role in guiding the up-and-down movement of the T-shaped head pressing rod (7); the round pipe (6) is fixed on the supporting vertical plate (2) through the supporting connecting rod (3); the bottom of the weight (5) is provided with a blind hole with the diameter larger than that of the T-shaped head pressing rod (7); the upper part of the T-shaped head pressing rod (7) is inserted into a blind hole in the bottom of the weight (5), so that the weight (5) can be stably placed on the T-shaped head pressing rod (7); a measuring head at the lower part of the dial indicator (4) is propped against the top of the weight (5) to measure the vertical displacement of the weight (5) and the T-shaped head pressure rod (7); the dial indicator (4) is fixed on the supporting vertical plate (2) through the supporting connecting rod (3).
2. The apparatus of claim 1, wherein the apparatus comprises: the weight (5), the round pipe (6), the T-shaped head pressing rod (7) and the sample supporting rod (9) are made of metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922188498.XU CN211206076U (en) | 2019-12-10 | 2019-12-10 | Instrument for measuring bending creep resistance of hard plastic |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922188498.XU CN211206076U (en) | 2019-12-10 | 2019-12-10 | Instrument for measuring bending creep resistance of hard plastic |
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| CN211206076U true CN211206076U (en) | 2020-08-07 |
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| CN201922188498.XU Active CN211206076U (en) | 2019-12-10 | 2019-12-10 | Instrument for measuring bending creep resistance of hard plastic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793869A (en) * | 2019-12-10 | 2020-02-14 | 陕西理工大学 | Instrument for measuring bending creep resistance of hard plastic |
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- 2019-12-10 CN CN201922188498.XU patent/CN211206076U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110793869A (en) * | 2019-12-10 | 2020-02-14 | 陕西理工大学 | Instrument for measuring bending creep resistance of hard plastic |
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