CN116698544B - Pouring mold and pouring method for layer-arrangement alternating test piece with variable angle and distance - Google Patents
Pouring mold and pouring method for layer-arrangement alternating test piece with variable angle and distance Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims abstract description 19
- 238000002474 experimental method Methods 0.000 claims abstract description 19
- 238000002955 isolation Methods 0.000 claims description 31
- 238000005266 casting Methods 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 239000011229 interlayer Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 114
- 239000010410 layer Substances 0.000 description 29
- 239000011435 rock Substances 0.000 description 25
- 238000002360 preparation method Methods 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
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- 230000015572 biosynthetic process Effects 0.000 description 3
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- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
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- 238000005065 mining Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000005464 sample preparation method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention provides a pouring die and a pouring method of a bedding alternating test piece with variable angles and distances, and belongs to the technical field of rock-soil experiments. The pouring die comprises a film, a film clamping device, a die with a slit, a clamping device and a film blocking device, wherein the film clamping device is of a U-shaped structure, the die with the slit is arranged in the film clamping device, the film penetrates through a first slit with the slit die and a second slit with the film clamping device, and the die with the slit is divided into at least two pouring cavities; the bottom of the mold with the thin seam and the bottom plate of the film clamping device are provided with through holes with the same size, the round shaft penetrates through the through holes, and the mold with the thin seam and the film clamping device are connected through the round shaft and can rotate around the round shaft relatively. The invention can more conveniently manufacture a large number of samples with interlayer spacing, interlayer inclination angle and interlayer materials as variables, effectively reduces manufacturing procedures, saves manufacturing time and reduces waste of materials, and importantly, the die is not required to be cut in pouring, so that the safety is greatly improved.
Description
Technical Field
The invention relates to the technical field of rock and soil experiments, in particular to a pouring die and a pouring method for a bedding alternating test piece with variable angles and distances.
Background
Formations formed by compounding different rocks such as mudstones and sandstones are distributed in certain coal-based sedimentary formations, which are formations frequently occurring in coal mining, and are mainly characterized in that different mineral fragments are alternately deposited or deteriorated layer by layer to form a rock structure with alternate layers. Many coal mine tunnel strata are distributed with layered composite rock bodies, and surrounding rock damage phenomena such as roof separation, asymmetric convergence of two sides, bottom bulging, shoulder closing and the like caused by tunnel tunneling under the layered surrounding rock condition are very easy to generate safety problems, and the coal mine production progress is influenced. Coal mine roadways are often arranged in lamellar coal-rock interbedded, surrounding rocks show asymmetric and uneven damage characteristics, and the conventional open symmetrical support technical scheme is poor in effect and is unfavorable for long-term maintenance of the roadway.
The layered composite rock mass with different lithology interbedded has important scientific and engineering practical values for developing mechanical property research. To investigate the anisotropic character of layered rock mass, many scholars have made extensive experimental studies. The original rock cutting pattern is not easy to select and manufacture, and a large number of experiments are performed at home and abroad to use manual pouring to prefabricate the rock-like body sample rich in the layer for research.
In order to produce experimental samples with alternating rock layers, a great deal of beneficial exploration is carried out by students, for example, the sample is produced by adopting a technical method of pouring and then cutting adopted in paper 'application of different joint models in discrete element simulation of layered composite rock'. In this method, a rock-like body sample rich in the layer can be produced. However, the process is complex, the time and the cost are high, and a large amount of experimental materials are wasted. In addition, the mode of the product can only produce experimental samples with the same material and layer spacing in one batch of products. If the sample preparation method is used for preparing experimental test pieces with the material, the layer reason interval and the layer reason inclination angle as variables, a large amount of materials are wasted, multiple batches of sample preparation are needed, more working procedures are needed, and the waste time is more serious.
The invention patent CN 111175105B provides a preparation method of a layered rock-like test piece. The method can simulate accurately and make each layer rock structure of the layered rock body, but can not make the layer rock sample with changeable dip angle and joint thickness conveniently and rapidly.
The invention patent CN 104990758A provides a method for manufacturing artificial rock cores with different bedding angles. The manufacturing mode is the same as the sample manufacturing mode of the technology which is adopted in the paper 'application of different joint models in layered composite rock discrete element simulation' and is used for pouring and then cutting. As do the disadvantages.
The invention patent CN 110320077A provides a device for manufacturing a rock mass test piece containing a weak interlayer and an operation method, wherein the device can manufacture a single-layer rock mass test piece, but cannot manufacture a multi-layer rock mass test piece.
In view of the above, the main disadvantages of the prior art include:
(1) In the prior art, the manufacturing steps are complicated when manufacturing the layered rock-like body test piece, and the prior art is mainly divided into two procedures of layered sample manufacturing and cutting. The process is more, the manufacturing time is long, and the waste of materials is large.
(2) In the prior art, if a large number of experimental test pieces with interlayer spacing and different interlayer materials as experimental variables are manufactured, a large amount of work is required and serious material waste is caused.
(3) In the prior art, the inclination angle of a bedding rock mass test piece is changed through the inclined cutting tool bit, so that the operation is complex.
Disclosure of Invention
The invention provides a pouring die and a pouring method of a layer alternate test piece with variable angles and distances.
In order to solve the above-mentioned purpose, the technical scheme provided by the invention is as follows:
the pouring mould of the layer-structured alternating test piece with variable angle and distance comprises a film, a film clamping device, a mould with fine slits, a clamping device and a film blocking device,
the film clamping device is of a U-shaped structure, the mold with the thin seam is arranged in the film clamping device, and a film passes through the thin seam I with the thin seam mold and the thin seam II of the film clamping device to divide the mold with the thin seam into at least two pouring cavities;
clamping devices are arranged on the outer sides of two side walls of the film clamping device and used for fixing films;
the outer side of the side wall of the mold with the slit is provided with a groove, and the film blocking device is inserted into the groove.
The bottom of the mold with the thin seam and the corresponding position of the bottom plate of the film clamping device are provided with through holes with the same size, and a round shaft penetrates through the through holes;
the mold with the thin seam is square or cylindrical.
And pouring different materials in the pouring cavity.
The side walls of the mold with the thin slits are uniformly distributed with the thin slits I which are communicated with and perpendicular to the bottom surface of the mold, the thin slits II which are communicated with and perpendicular to the bottom plate of the film clamping device are uniformly distributed on the side walls of the film clamping device, the lengths and directions of the thin slits I and the grooves are consistent, and the distance between the adjacent grooves is larger than that between the adjacent thin slits I.
And a corner pointer is arranged at one corner of the bottom surface of the mold with the thin seam.
The bottom plate of the film clamping device is carved with a distance scale and an angle scale, the distance scale is used for measuring the distance between films, and the angle scale is matched with a corner pointer to measure the inclination angle between the side wall of the mold with the slit and the two side walls of the film clamping device.
The film is divided into an isolation film for dividing a pouring cavity and a wrapping film for blocking the other fine slits I which do not pass through the isolation film in the fine slit die, and the wrapping film is inserted into a groove on the outer wall of the fine slit die through a film blocking device to be fixed; the film is a plastic film, and the thickness of the film is 8-30 mu m.
The film blocking device is of a strip-shaped structure with the width and the length being the same as those of the groove.
The pouring method using the pouring die comprises the following steps:
s1, adjusting the angle of the mold with the fine seam according to the bedding inclination angle of the test piece in the experiment:
assembling a film clamping device and a mold with a thin seam, placing the film clamping device on an experiment platform, placing the mold with the thin seam on the film clamping device, connecting through holes of the film clamping device and the mold with the thin seam directly opposite to each other through a circular shaft, and rotating the mold with the thin seam to enable a corner pointer at the outer end of the mold with the thin seam to point to a corresponding scale of the angle scale of the bottom plate of the film clamping device, so that the experiment design requirement is met;
s2, determining and placing an isolation film according to the layer reason interval of the test piece in the experiment;
selecting proper thin slits according to the preset experimental distance, and sequentially penetrating a selected number of isolation films through the second thin slits on the side wall of the film clamping device, wherein the interval between adjacent isolation films penetrating through the second thin slits is the bedding interval of the rock-like body test piece;
after passing through the second slit of the film clamping device, the isolation film passes through the first slit of the side wall of the mold with the slit, the interior of the mold is divided into a plurality of pouring cavities, the films at the outer end of the film clamping device are smoothed out, and the films are fixed by using a clamping device, so that the space in the mold is not deformed during pouring;
s3, plugging redundant fine seams on the fine seam die:
the wrapping film is used for wrapping the non-passing non-used fine slits of the isolation film in the mold with fine slits, and the film blocking device is used for fixing the wrapping film, so that the whole mold with fine slits is prevented from leaking when in use;
s4, pouring a test piece:
pouring the pouring cavity, specifically:
(1) pouring in the same batch, and after the boundary of the adjacent materials is solidified, extracting the isolation film:
(2) pouring in batches, after one material is relatively solidified, taking down the isolation film and pouring the other material;
s5, taking down the mold with the fine seam:
carefully taking down the mold with the slit, installing another empty mold with the slit on the film clamping device according to the experimental requirement, and repeating the steps to prepare a sample next time;
and (5) carrying out demoulding treatment after curing the removed mould with the fine seam for one to two days.
And the isolation film in the S2 is perpendicular to the side wall of the film clamping device, and the film spacing in the mold with the thin slits is consistent with the film spacing penetrating through the film clamping device.
Compared with the prior art, the technical scheme has at least the following beneficial effects:
above-mentioned scheme has designed the isolation mould that the cooperation film used together, can more conveniently make a large amount of samples with layer reason interval, layer reason inclination, layer reason material as the variable to effectively reduced the preparation process, saved the preparation time, reduced the waste of material, importantly, need not cut in this mould pouring, the security has obtained very big improvement. The method has the specific advantages that:
(1) The material is saved, the prior art needs to make the template first, then cuts the experiment body, can certainly remain the leftover materials that can't experiment, causes a large amount of material waste.
(2) The number of working procedures is reduced, and the prior art needs two working procedures of sample preparation and cutting, and the invention only needs one working procedure of sample preparation.
(3) The time is reduced, the sample preparation process in the prior art needs one-layer pouring, and the next layer pouring is performed after the previous layer is dried, so that the time consumption of the sample preparation process for a plurality of layers of rock-like mass test pieces is necessarily high, and the experimental period can be shortened.
(4) The invention is safer, the subsequent cutting operation is not needed, and the danger is reduced.
(5) The invention has incomparable advantages for the mass production of test pieces with inclination angles, layer reason intervals and different layer reason materials as experimental variables, and the rest of the prior art can not realize the random adjustment of the variables. For example, it is not clearly practical to make experimental test pieces with 5 dip angles x 5 layer physical pitches x 5 casting materials for 125 variables in total, but the present invention can solve such problems.
(6) The invention can manufacture test pieces of other irregular pouring spaces except for bedding rock mass, and provides a opportunity for experimental innovation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a casting mold structure of a layer alternate test piece with variable angles and distances;
FIG. 2 is a schematic view of a wrapping film wrapping excess gap in a casting mold according to the present invention;
FIG. 3 is a schematic diagram of a film clamp in a casting mold according to the present invention;
FIG. 4 is a schematic view of a casting mold with a slit mold in a square shape;
FIG. 5 is a top view of a mold for producing samples at different angles and different layer thicknesses in use of the casting mold of the present invention, wherein (a) is a mold for producing samples with a layering inclination angle of 0 ℃, (b) is a mold for producing samples with a layering inclination angle of 30 ℃, (c) is a mold for producing samples with a layering inclination angle of 45 °, (d) is a mold for producing samples with a layering inclination angle of 45 °, and a layering interval of 20mm, and (e) is a mold for producing samples with a layering inclination angle of 45 °, and a layering interval of 13 mm;
fig. 6 is a schematic diagram of a portion of an unconventional sample and a cylindrical sample fabricated by a casting mold according to the present invention, wherein (a) is an unconventional sample one, (b) is an unconventional sample two, and (c) is a cylindrical sample.
Wherein the reference numerals are as follows:
1-a film; 2-film clamping device; 3-a mold with a slit; 4-through holes; 5-a circular shaft; 6-fine sewing I; 7-a second fine seam; 8-pouring a cavity; 9-grooves; 10-corner pointers; 11-distance scale; 12-angle scale; 13-a clamping device; 14-a separation film; 15-wrapping the film; 16-membrane plugging device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
It should be noted that "upper", "lower", "left", "right", "front", "rear", and the like are used in the present invention only to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.
The invention provides a pouring die and a pouring method of a layer alternate test piece with variable angles and distances.
As shown in fig. 1, the casting mold comprises a film 1, a film clamping device 2, a mold with a slit 3, a clamping device 13 and a film blocking device 16,
the film clamping device 2 is of a U-shaped structure, the mold 3 with the thin seam is arranged in the film clamping device 2, the film 1 passes through the thin seam I6 with the mold 3 with the thin seam and the thin seam II 7 of the film clamping device 2, and the mold 3 with the thin seam is divided into at least two pouring cavities 8;
the clamping devices 13 are arranged on the outer sides of the two side walls of the film clamping device 2 and used for fixing the film 1, and the film clamping device can also determine the film distance;
the mold with the slit 3 is used for pouring a test piece, the outer side of the side wall of the mold with the slit is provided with a groove 9, and a film blocking device 16 is inserted into the groove 9.
The bottom of the mold with the thin seam 3 and the corresponding position of the bottom plate of the film clamping device 2 are provided with through holes 4 with the same size, a round shaft 5 penetrates through the through holes 4, and the mold with the thin seam 3 and the film clamping device 2 are connected through the round shaft 5 and can rotate relatively around the round shaft; the slotted die is square or cylindrical, as shown in fig. 4, which is a schematic diagram of a square slotted die.
And different materials are poured into the pouring cavity 8.
The side wall of the mold with the thin seam 3 is uniformly provided with a thin seam I6 which is communicated with and vertical to the bottom surface of the mold, the two side walls of the film clamping device 2 are uniformly provided with thin seams II 7 which are communicated with and vertical to the bottom plate of the film clamping device, the length and the direction of the thin seam I6 and the groove 9 are consistent, and the distance between the adjacent grooves 9 is greater than that between the adjacent thin seams I6.
And a corner pointer 10 is arranged at one corner of the bottom surface of the mold with the thin seam 3.
As shown in fig. 3, a distance scale 11 and an angle scale 12 are carved on the bottom plate of the film clamping device 2. The distance scale 11 is used for measuring the distance between films, and the angle scale 12 is matched with the corner pointer 10 to measure the inclination angle between the side wall of the mold with the slit and the two side walls of the film clamping device.
The film 1 is divided into an isolation film 14 for dividing pouring cavities and a wrapping film 15 for blocking the other fine slits 6 which do not pass through the isolation film 14 in the fine slit die 3, the isolation film 14 is used for isolating different pouring materials, and the wrapping film 15 is inserted into a groove on the outer wall of the fine slit die through a film blocking device 16 for fixing; the film is made of fresh-keeping film or common plastic film.
The film blocking device 16 is of a strip-shaped structure with the width and the length being the same as those of the groove, and is inserted into the groove 9 on the outer wall of the mold 3 with the thin seam when in use, so that the film can be well fastened and wrapped, and the effect of preventing leakage outside the mold with the thin seam when in pouring is achieved.
The tightening device 13 is formed by combining a clip and a tightening bolt.
The concrete pouring method using the pouring die comprises the following steps:
s1, adjusting the angle of the mold with the fine seam according to the bedding inclination angle of the test piece in the experiment:
assembling a film clamping device and a mold with a thin seam, placing the film clamping device on an experiment platform, placing the mold with the thin seam on the film clamping device, connecting through holes of the film clamping device and the mold with the thin seam directly opposite to each other through a circular shaft, and rotating the mold with the thin seam to enable a corner pointer at the outer end of the mold with the thin seam to point to a corresponding scale of the angle scale of the bottom plate of the film clamping device, so that the experiment design requirement is met; specifically, as shown in fig. 5, a top view of a mold for manufacturing samples with different angles and different layer-to-layer distances is shown;
s2, determining and placing an isolation film according to the layer reason interval of the test piece in the experiment;
selecting proper thin slits according to the preset experimental distance, and sequentially penetrating a selected number of isolation films through the second thin slits on the side wall of the film clamping device, wherein the interval between adjacent isolation films penetrating through the second thin slits is the bedding interval of the rock-like body test piece;
after passing through the second slit of the film clamping device, the isolation film passes through the first slit of the side wall of the mold with the slit, the interior of the mold is divided into a plurality of pouring cavities, the films at the outer end of the film clamping device are smoothed out, and the films are fixed by using a clamping device, so that the space in the mold is not deformed during pouring;
s3, plugging redundant fine seams on the fine seam die:
the wrapping film is used for wrapping the non-passing non-used fine slits of the thin film in the mold with fine slits, and the film blocking device is used for fixing the wrapping film, so that the whole mold with fine slits is prevented from leaking when in use, as shown in fig. 2;
s4, pouring a test piece:
pouring the pouring cavity, specifically:
(1) pouring in the same batch, and extracting the isolation film in a short period after pouring:
taking a bedding rock mass as an example, pouring different pouring spaces in the mould respectively by using preset materials, and simultaneously continuously vibrating and compacting. And after the complete pouring is finished, according to the property of the pouring material, the isolation film can be slowly pulled out to finish the die building after the boundary of the adjacent material is solidified but the inside is not completely solidified.
(2) Pouring in batches, after one material is relatively solidified, taking down the isolation film and pouring the other material;
taking a bedding rock mass as an example, pouring different pouring spaces in a mould by using preset materials respectively, pouring small chambers of one material firstly, taking down the mould with the fine slits according to the steps, standing and curing for a period of time until the pouring materials are slightly shaped, then taking down the separation diaphragm lightly and pouring another material in the rest space. If the number of the materials of the experimental test piece is more than 2, the method is sequentially carried out.
S5, taking down the mold with the fine seam:
carefully taking down the mold with the slit, installing another empty mold with the slit on the film clamping device, and repeating the steps to prepare a sample next time;
the removed mold with the slit is subjected to demolding treatment after one to two days of maintenance;
s6, performing an experiment:
and carrying out experiments on the prepared rock-like body sample.
Wherein, the isolation film in the S2 is perpendicular to the side wall of the film clamping device, and the film interval in the mold with the slit is consistent with the film interval penetrating the film clamping device.
The part of unconventional samples and cylindrical samples manufactured by the casting mold of the invention are shown in fig. 6, and more unconventional samples can be manufactured by using the mold of the invention according to experimental requirements.
The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.
Claims (6)
1. A pouring mould of a layer-structured alternating test piece with variable angles and distances is characterized by comprising a film, a film clamping device, a mould with fine slits, a clamping device and a film blocking device,
the film clamping device is of a U-shaped structure, the mold with the thin seam is arranged in the film clamping device, and a film passes through the thin seam I with the thin seam mold and the thin seam II of the film clamping device to divide the mold with the thin seam into at least two pouring cavities;
clamping devices are arranged on the outer sides of two side walls of the film clamping device and used for fixing films;
the outer side of the side wall of the mold with the thin seam is provided with a groove, and the film blocking device is inserted into the groove;
the bottom of the mold with the thin seam and the corresponding position of the bottom plate of the film clamping device are provided with through holes with the same size, and a round shaft penetrates through the through holes;
the mold with the thin seam is square or cylindrical;
a corner pointer is arranged at one corner of the bottom surface of the mold with the thin seam;
a distance scale and an angle scale are carved on the bottom plate of the film clamping device;
the film is divided into an isolation film for dividing a pouring cavity and a wrapping film for blocking the other fine slits I which do not pass through the isolation film in the fine slit die, and the wrapping film is inserted into a groove on the outer wall of the fine slit die through a film blocking device to be fixed;
the film is a plastic film, and the thickness of the film is 8-30 mu m.
2. The casting mold for the layer alternating test pieces with the variable angles and distances according to claim 1, wherein different materials are cast in the casting cavity.
3. The pouring mold for the layer-by-layer alternating test pieces with the variable angles and the variable distances according to claim 1, wherein the first slots penetrating through and perpendicular to the bottom surface of the mold are uniformly distributed on the side walls of the mold with the slots, the second slots penetrating through and perpendicular to the bottom plate of the film clamping device are uniformly distributed on the side walls of the film clamping device, the first slots are consistent with the lengths and the directions of the grooves, and the distance between the adjacent grooves is larger than that between the first slots.
4. The casting mold for the layer alternate test piece with the variable angle and distance according to claim 1, wherein the film blocking device is of a strip-shaped structure with the width and the length being the same as those of the groove.
5. The casting method of the casting mold for the layer alternate test piece with the variable angle and distance according to claim 1, which is characterized by comprising the following steps:
s1, adjusting the angle of the mold with the fine seam according to the bedding inclination angle of the test piece in the experiment:
assembling a film clamping device and a mold with a thin seam, placing the film clamping device on an experiment platform, placing the mold with the thin seam on the film clamping device, connecting through holes of the film clamping device and the mold with the thin seam directly opposite to each other through a circular shaft, and rotating the mold with the thin seam to enable a corner pointer at the outer end of the mold with the thin seam to point to a corresponding scale of the angle scale of the bottom plate of the film clamping device, so that the experiment design requirement is met;
s2, determining and placing an isolation film according to the layer reason interval of the test piece in the experiment;
selecting proper thin slits according to the preset experimental distance, and sequentially penetrating a selected number of isolation films through the second thin slits on the side wall of the film clamping device, wherein the interval between adjacent isolation films penetrating through the second thin slits is the layer reason interval of the rock-like body test piece;
after passing through the second slit of the film clamping device, the isolation film passes through the first slit of the side wall of the mold with the slit, the interior of the mold is divided into a plurality of pouring cavities, the films at the outer end of the film clamping device are smoothed out, and the films are fixed by using a clamping device, so that the space in the mold is not deformed during pouring;
s3, plugging redundant fine seams on the fine seam die:
the wrapping film is used for wrapping the non-passing non-used fine slits of the isolation film in the mold with fine slits, and the film blocking device is used for fixing the wrapping film, so that the whole mold with fine slits is prevented from leaking when in use;
s4, pouring a test piece:
pouring the pouring cavity, specifically:
(1) pouring in the same batch, after pouring, solidifying the boundary of the adjacent materials, and extracting the isolation film:
(2) pouring in batches, after one material is relatively solidified, taking down the isolation film and pouring the other material;
s5, taking down the mold with the fine seam:
carefully taking down the mold with the slit, installing another empty mold with the slit on the film clamping device according to the experimental requirement, and repeating the steps to prepare a sample next time;
and (5) carrying out demoulding treatment after curing the removed mould with the fine seam for one to two days.
6. The casting method of the casting mold for the lamellar alternating test piece with variable angle and distance according to claim 5, wherein the isolating film in the S2 is perpendicular to the side wall of the film clamp, and the film spacing in the mold with the slit is consistent with the film spacing penetrating the film clamp.
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