CN113804584B - Material fluidity experimental device based on spiral flow channel - Google Patents
Material fluidity experimental device based on spiral flow channel Download PDFInfo
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Abstract
The invention provides a material fluidity experiment device based on a spiral runner, and belongs to the technical field of investment casting teaching experiment instrument equipment. The technical proposal is as follows: the material fluidity experimental device based on the spiral runner comprises a basic platform, and the experimental device further comprises a die system and a heating and heat preserving module. The beneficial effects of the invention are as follows: the experimental device is intensive in space and movable; the equipment has the advantages that the size of the equipment module is smaller, the base platform is provided with the movable casters, the occupied space is small, the equipment is convenient to carry, the integration degree is higher, and the equipment is convenient to use, install and debug in groups as required; the repetition precision and comparability of the experiment based on the device are good.
Description
Technical Field
The invention relates to the technical field of investment casting teaching experimental instruments and equipment, in particular to a material fluidity experimental device based on a spiral runner.
Background
Casting is one of the basic processes of the modern basic machine-building industry. The fluidity experiment related to the casting process is a basic experiment course of the mechanical engineering class profession of the ordinary universities. Fluidity is one of the casting properties of the alloy, directly affecting the ability of the liquid alloy to fill. The alloy with better fluidity has stronger filling capability, can cast castings with clear contours and thin walls and complex shapes, and is also beneficial to floating up, discharging and feeding of impurities and gas in the solidification process; the alloy with poor fluidity is difficult to fill the cavity, has poor filling capability, and is easy to generate defects of insufficient pouring, cold insulation, air holes, slag inclusion and the like. Through the fluidity experiment teaching, students can know the concept, the testing method and the influencing factors of the fluidity of the material, and meanwhile, the basic knowledge of engineering materials and material forming is comprehensively known.
Investment casting is growing with the development of technology. Investment casting is also called precision casting or lost wax casting, which is to make an accurate fusible model by using fusible materials (wax materials and the like), coat a plurality of layers of refractory coating on the model, dry and harden the model into an integral model shell, then heat the model shell to melt the lost wax materials, bake the model shell at high temperature to form a refractory model shell, pour liquid metal into the model shell, and cool the model shell to obtain the casting. The main advantages of investment casting compared to other casting methods are as follows: the dimensional accuracy of the casting is higher, the surface roughness is lower, the casting with complex shape can be poured, the general accuracy can reach 5-7 levels, and the roughness reaches two Ra25-6.3 mu m; the casting with thin wall and small weight can be cast, the minimum wall thickness of the investment casting can reach 0.5mm, and the weight can be as small as a few grams; can cast fine patterns, characters and castings with fine slots and curved fine holes; the shape and the inner cavity shape of the investment casting are almost unlimited, parts with complex shapes which are difficult to manufacture by sand casting, forging, cutting processing and other methods can be manufactured, and some assemblies and welding parts can be directly cast into integral parts after the structure is improved, so that the weight of the parts is reduced, and the production cost is reduced; the type of casting alloy is almost unlimited, and is commonly used for casting alloy steel pieces, carbon steel pieces and heat-resistant alloy castings; the production lot is not limited and can be mass-produced from a single piece to a batch. With the development of investment casting technology, the types of mold materials are increasingly large, and the compositions are different. The molding materials are generally classified into high-temperature, medium-temperature and low-temperature molding materials according to the melting point of the molding materials. The melting point of the low-temperature molding material is about 60 ℃, and the paraffin-stearic acid mixture widely applied in China is used as the low-temperature molding material. The Gao Wenmo material has a melting point higher than 120 ℃, and the mold material with the composition of rosin 50%, ceresin 20% and polystyrene 30% is a typical high-temperature mold material. The melting point of the intermediate temperature mold material is between the two types of mold materials, and the existing intermediate temperature mold material can be basically divided into rosin-based and wax-based mold materials.
With the development of casting industry technology, new requirements are put forward for experimental practice teaching of high schools, and liquidity measurement teaching experiments of low-melting-point materials need to be developed in an investment casting-oriented manner. The novel heating technology and the novel heating device are introduced into the ZL2020211803071 (CN 212112981U) patent, the fire hidden danger existing in an open fire electric furnace is solved, the pouring cup spliced by two pouring cup plates is designed in the ZL2020211815083 (CN 212161048U) patent, the problem that a pouring cup of a traditional experimental device is not easy to clean is solved, a longer serpentine flow channel is designed in the ZL2020211806652 (CN 212254969U) patent, and the problem that the experimental phenomenon of an original shorter linear flow channel is not obvious is solved. On the basis of researching and using the existing novel flowability experimental equipment in the laboratory, the existing novel flowability experimental equipment for the material in the laboratory still has certain defects, and cannot further meet or reach the high standard requirement of the experiment. Through investigation and after multiple uses, the following is found: the flow speed of wax at the bend of the serpentine flow channel of the existing novel material fluidity experimental equipment in the laboratory is uneven, so that the comparability of experimental process data is reduced; meanwhile, the mold body cannot be insulated for a long time in the experimental process, so that the external environment temperature of the winter and summer season changes, and the repeated experimental phenomenon of the equipment is reduced; in addition, the pouring cup of the existing experimental equipment is small in size, and the problems of flow interruption, flash flow and the like are easy to occur in the pouring process.
There are several problems with the current state:
1. The existing experimental equipment has the defects that the main body of the flow die cannot be heated and insulated, the experimental process is easily influenced by the change of the room temperature caused by the seasonal change, the repeatability of experimental data is reduced at different room temperatures, and more time is needed to cool wax materials so as to meet the experimental requirements.
2. When the experimental equipment performs a flowability experiment, wax materials are heated to 65 ℃ and 75 ℃ respectively, the section quality and the flow length of the formed solid wax materials in a flat plate die are compared to analyze the flowability of the materials, but in an actual experiment, the wax material flow velocity at 65 ℃ and 75 ℃ is uneven due to the fact that the designed curve of a serpentine flow channel is sufficient, the variable is increased, and the uncertainty of the experiment is increased.
3. In the experimental process, because the existing pouring cup is smaller, the buffer wax is limited, and adverse experimental factors such as flash flow and flow break easily occur due to improper operation, and the bolt is required to be locked, so that the disassembly and assembly convenience is required to be improved.
Disclosure of Invention
The invention aims to provide a material fluidity experiment device based on a spiral flow channel, which further improves the quality and popularization and application value of novel material fluidity experiment teaching equipment.
The idea of the invention is that: different temperatures are set through the heating cabin body to melt wax materials, wax materials with different formulas are heated in each heating cabin body, wax material fluidity experiment comparison of different temperatures and different components is realized, and the mold is set according to different experiment requirements, so that the comparison of wax materials with different temperatures and different materials can be completed at one time.
In order to better achieve the purpose of the invention, the invention also provides an experimental operation flow of the material fluidity experimental device based on the spiral flow channel, which comprises the following steps: the wax material is placed in the pouring cup and melted in the heating cabin, the melted liquid wax material is poured into the mold runner through the pouring opening in the mold system, after the liquid wax material flows in the mold for filling and solidification, the influence of different experimental conditions on the flow performance of the material is reflected by the flow length of the wax material in the mold, and the longer the wax material flows in the mold, the better the flow performance of the wax material; meanwhile, the visual transparent PC board is combined, so that the surface morphology and quality of the sample can be visually observed under different pouring conditions.
The invention is realized by the following measures: the material fluidity experimental device based on the spiral runner comprises a basic platform, wherein the experimental device further comprises a die system and a heating and heat preserving module.
The base platform comprises an operation table formed by an operation table surface and a rack, and a storage cabin arranged on one side of the operation table, wherein horizontal adjustment supporting type casters are arranged at four corners of the bottom of the base platform, a sliding frame is arranged below the other side of the base platform, and the storage cabin is used for containing experimental wax materials and experimental workers.
The horizontal adjustment supporting type trundles move and level the stand of the operation table, so that the operation table top is ensured to be kept horizontal.
The sliding frame moves back and forth and left and right so as to adapt to heating and heat preservation modules with various sizes.
The mold system comprises a conical pouring cup, a conical pouring cup sleeve, a hexagonal nut, an upper template made of transparent visual PC materials, a positioning pin, a lower template with a spiral runner, a heating heat preservation pad, a heat insulation layer, a protection bottom shell, a fastening screw and a leveling base with a stud.
The heating and heat-preserving module comprises metal beakers, a separation net and a heating cabin body, wherein the set temperature range of the heating cabin body is 40-300 ℃, the heating cabin body is used for constant temperature control, and 4 metal beakers can be accommodated once through the separation of the separation net.
As a further optimization scheme of the material fluidity experiment device based on the spiral flow channel, a heating and heat preservation module is arranged on the left side of a frame of the basic platform; two groups of die systems are arranged above the operating table top; the mould system is threaded to the lower part through the middle hole site of the operation table top from the lead-out cable line of the belt, and is combined with the heating and heat-preserving module cable to be led out to an external power supply facility after a group of switches or power strips are combined.
The frame can be constructed by aluminum profiles, profile steel and the like, and the drawing example is constructed based on the aluminum profiles. And placing the spiral flow die and related experimental equipment, and reserving a cabinet on the right side of the rack so as to facilitate the storage of various experimental articles.
As a further optimization scheme of the material fluidity experiment device based on the spiral runner, in the die system, the heating heat preservation pad, the heat insulation layer and the protection bottom shell are sequentially buckled on the bottom surface of the lower die plate and are locked by fastening screws.
The mold base is arranged on a leveling base with a stud, the lower template and the upper template are positioned by the positioning pin, the upper template made of transparent visual PC material, the lower template and the upper template are locked and fixed by adopting a hexagonal nut, and the leveling base with the stud is used for leveling the lower template and the upper template;
the conical pouring cup sleeve is embedded into the conical hole matched with the upper template, and the conical pouring cup is embedded into the conical pouring cup sleeve.
The flow channel adopts a spiral flow channel, the length of the flow channel is 2000-3500 mm, and the length of the flow channel adopts a scale of 50mm, so that the measurement and the reading of experimental data are facilitated.
As a further optimization scheme of the spiral flow channel-based material fluidity experiment device, the heating and heat preservation module consists of a heating cabin body formed by a heating device and a temperature control unit, a separation net arranged in the heating cabin body and a plurality of metal beakers for melting wax materials arranged on the separation net in the heating cabin body.
The metal beaker is provided with a long pouring nozzle, the heating cabin body is made of stainless steel materials, the heating device is made of resistance wires, the temperature control unit is used for temperature setting and real-time detection of heating temperature, the target heating temperature is reached, the metal beaker has an automatic heat preservation function, two different liquid wax materials can be arranged in one heating heat preservation module, and the heating heat preservation module can heat at constant temperature or adjust heating temperature.
In order to better achieve the purpose of the invention, the invention also provides a method for installing a mould system of a material fluidity experiment device based on a spiral runner, which comprises the following steps: the method comprises the following steps:
Step one, completing the assembly of a base part of a die, sequentially buckling a heating heat-insulating pad, a heat-insulating layer and a protective bottom shell on the bottom surface of a lower die plate, and locking by adopting a fastening screw;
step two, mounting the die base on a leveling base with a stud, mounting an upper template made of transparent visual PC material, positioning a lower template and the upper template by adopting a positioning pin, locking the parts by adopting a hexagonal nut, and leveling the lower template and the upper template by utilizing the leveling base with the stud;
step three, embedding the conical pouring cup sleeve into a conical hole matched with the upper template, and embedding the conical pouring cup into the conical pouring cup sleeve.
The spiral runner is adopted in the runner, the length of the runner is generally an integer, the length of the runner is generally 2000-3500mm, marked scale marks are arranged on the outer side of the spiral runner in a surrounding mode, the integrity of the section of the runner is not damaged, the length of the runner is in a scale of 50mm, measurement and reading of experimental data are facilitated, and meanwhile a foundation is provided for guaranteeing the repeated reproducibility of the experimental data.
In order to better achieve the purpose of the invention, the invention further provides an experimental method of the material fluidity experimental device based on the spiral flow channel, which comprises the following steps: the method comprises the following steps:
First, experimental preparation: checking experimental equipment, cleaning surface floating dust and sundries such as an experimental device, a runner and the like, switching on a power supply of the experimental equipment, switching on a switch of a heating and heat preserving device, and setting target heating and heat preserving temperature;
Secondly, preheating the mould, confirming to switch on a power supply of experimental equipment, further opening a heating switch of a heating and heat-preserving pad of the mould system, setting target heating and heat-preserving temperature, and preheating the mould system to the set temperature;
thirdly, preparing wax: preparing wax according to a required formula, and filling the wax into a metal beaker;
fourth, melting wax: placing a metal beaker filled with wax into a heating and heat preserving device, and heating and melting the wax according to experimental temperature conditions;
fifth step, pouring the sample: pouring the melted four groups of wax materials with two temperature conditions and two formulas into corresponding mould systems;
Sixthly, cutting off the power supply: after the pouring experiment process is finished, the power supply of the heating heat preservation pad is cut off in time, so that wax in the spiral flow channel can be radiated and solidified as soon as possible, and meanwhile, the power supply of the heating heat preservation device is cut off;
seventh, observing experimental phenomena and recording results: observing the surface quality of the obtained sample under different pouring conditions, and recording the filling length of the obtained pouring sample under different pouring conditions;
Eighth step, cleaning wax: after the mold system is cooled to room temperature, cleaning the mold system and waxing materials on a basic platform, and preparing for the next experiment;
ninth, ending the experiment: and (5) restoring the placement of experimental equipment and tools and finishing the experiment.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention relates to a heating and constant temperature control module of a fluid mould system, which is characterized in that an existing test bed and a fluid mould do not have the functions of heating and heat preservation, the mould system is provided with a self-heating and constant temperature control module, a layer of electric heating heat preservation pad is arranged on the bottom surface of a lower mould plate of the mould, a heat preservation layer and a protective shell are sequentially arranged below the electric heating heat preservation pad, and meanwhile, a cable is led out from the electric heating heat preservation pad to a temperature control module thereof, and the temperature control module has the functions of setting target heating temperature and detecting in real time, so that the heating temperature is ensured to be preserved at the target temperature, the temperature of the mould system is accurately controlled, the influence of environmental temperature of experimental equipment in different regions and seasons is solved, and the repetition precision and comparability of experiments are improved; the electric heating heat preservation pad has the heating heat preservation function of simulating an industrial actual production die, and the reliability of experiments in the experimental process and the accuracy of experimental results after the experiments are finished are further enhanced through the operation of the self-heating and constant temperature control module.
(2) The spiral flow channel design based on Archimedes spiral is characterized in that the flow channel adopted in the existing fluidity experimental equipment is a serpentine flow channel, so that uneven wax flow rates at 65 ℃ and 75 ℃ are caused at the designed curve of the serpentine flow channel in the experimental process, the variable is increased, the experimental uncertainty is increased, and the comparability of the material flow length result is reduced. Therefore, the serpentine flow channel is replaced by the spiral flow channel, the problem of uneven flow velocity caused by insufficient design curve is successfully avoided, and the accuracy of the experiment is realized. The spiral flow channel is marked with scales in a fixed length mode from the center starting point to the left and right in sequence, the fixed length scales are 50mm in this example, the scale length marking method is not limited, a metal marking method can be adopted, and specific length values are marked at the positions of all the scale lines. Meanwhile, the mark does not damage the integrity of the flow channel, so that the accuracy of the flow length of the material is further ensured as a result of the experiment.
(3) In the aspect of experimental organization, the experimental device adopts a combination mode of a spiral runner mold system and a basic platform, and can carry out experimental module combination according to experimental requirements under different scenes. The experimental device comprises: a base platform is provided with two sets of die systems, a heating chamber and necessary tools such as a thermometer. One set of experimental device can complete the comparison experiment of two wax materials under the same temperature condition; the comparison of pouring experiments of the same material at different temperatures can also be realized by means of a thermometer. The two-level two-factor full-cross experimental study of different materials and different temperatures can be carried out by combining two experimental devices. The combination of the three experimental devices can be used for carrying out comparison experiments of two different materials under three different temperature conditions; comparative experiments of three materials under two different temperature conditions can also be performed. Therefore, the fluidity comparison experiment of different experimental conditions and experimental wax combination can be satisfied, and a plurality of simultaneous operations can be realized. According to the mobile and assembly property of the experimental device, different experimental staff can configure the experimental device according to the experimental requirements, so that the experimental device is simple and convenient.
(4) Taper pouring cup sleeve and fastening device thereof. The fastening device is designed to be composed of a conical pouring cup and a conical sleeve, wherein the conical pouring cup and the conical sleeve are connected in an embedded mode (detachable) and then are connected with the base of the spiral runner mold through the conical sleeve; through the design, the die is connected with the conical pouring cup without fastening a nut and a bolt, and the self-locking pouring cup has good self-locking property, convenient operation, simple structure and convenient disassembly. The fastening of the die can not influence the placing position of the die, can not generate interference problem in actual experiment, does not need to additionally manufacture or purchase fastening devices, and reduces cost. By means of the design, the problem that the device is difficult to clean wax is further improved, and cleaning is more convenient.
(5) And (5) cleaning the experimental wax. The pouring cup of the flowable mold adopts the structural design of the conical pouring cup, so that wax materials can be cleaned after experiments, experimental cleaning work becomes simple and convenient, and experimental device materials are rust-resistant materials (stainless steel, aluminum alloy and PC board), so that the service life of equipment is effectively prolonged. Meanwhile, the pouring cups are made of stainless steel materials, so that the experimental device can be provided with a plurality of pouring cups, after the experimental device is used, wax materials in the pouring gate are remelted in the heating bin, and the materials and the pouring cups are recycled.
(6) Intensive space and mobile; the equipment module of this set is smaller in size, and basic platform design has the truckle that can remove, and occupation space is few, and the transport of being convenient for integrates the degree simultaneously higher, is convenient for select in groups, install and debug as required.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a schematic diagram showing the overall structure of a material fluidity test device with a spiral flow channel according to the present invention.
FIG. 2 is a schematic diagram of the combined arrangement of two experimental devices according to the present invention.
FIG. 3 is a layout diagram of a combination of three experimental sets of the invention.
Fig. 4 is an exploded view of the modular system of the present invention.
FIG. 5 is a schematic view of a spiral flow channel bottom plate structure according to the present invention.
FIG. 6 is an enlarged view of a portion of a spiral flow path floor according to the present invention.
Fig. 7 is an overall assembly view of the mold system of the present invention.
FIG. 8 is a schematic cross-sectional view of the mold system of the present invention taken along the vertical center.
FIG. 9 is a schematic diagram of a heating and insulating module according to the present invention.
FIG. 10 is a schematic view of a basic platform structure according to the present invention.
Fig. 11 is an experimental flow chart of the spiral flow channel-based material flowability experimental apparatus of the present invention.
The reference numerals are as follows: 1. a base platform; 2. a mold system; 201. a conical pouring cup; 202. conical sprue cup sleeve; 203. a hexagonal nut; 204. an upper template made of transparent visual PC material; 205. a positioning pin; 206. a lower die plate with a spiral flow channel; 207. heating the heat preservation pad; 208. a heat insulation layer; 209. a protective bottom shell; 210. a fastening screw; 211. leveling base with stud; 212. a flow passage; 3. a heating and heat preserving module; 401. a metal beaker; 402. a screen; 403. heating the cabin body; 501. an operation table; 502. a storage compartment; 503. horizontally adjusting the supporting castor; 504. and a sliding frame.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. Of course, the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
Referring to fig. 1 to 11, the technical scheme of the invention is that the material fluidity experiment device based on a spiral runner comprises a basic platform 1, wherein the experiment device further comprises a die system 2 and a heating and heat preserving module 3;
The basic platform 1 comprises an operation table 501 formed by an operation table surface and a frame, and a storage cabin 502 arranged on one side of the operation table surface, wherein the four corners of the bottom of the storage cabin are provided with horizontal adjustment supporting type casters 503, the lower part of the other side of the storage cabin is provided with a sliding frame 504, and the storage cabin 502 is used for accommodating experimental wax materials and experimental tools.
The horizontal adjustment supporting type castor 503 moves and levels the frame of the operation table 501, so as to ensure that the operation table top keeps horizontal;
the sliding frame 504 moves back and forth and left and right to adapt to the heating and heat preservation modules 3 with various sizes;
The mold system 2 comprises a conical pouring cup 201, a conical pouring cup sleeve 202, a hexagonal nut 203, an upper template 204 made of transparent visual PC material, a positioning pin 205, a lower template 206 with a spiral runner, a heating heat preservation pad 207, a heat insulation layer 208, a protection bottom shell 209, a fastening screw 210 and a leveling base 211 with a stud;
The heating and heat-preserving module 3 comprises a metal beaker 401, a screen 402 and a heating cabin 403, wherein the heating cabin 403 is set to be at a temperature ranging from 40 ℃ to 300 ℃ and used for constant temperature control, and 4 metal beakers can be contained at one time through the partition of the screen 402.
As a further optimization scheme of the material fluidity experiment device based on the spiral flow channel, a heating and heat preservation module 3 is arranged on the left side of a frame of a basic platform 1; two groups of mould systems 2 are arranged above the operating table top; the mould system 2 is threaded to the lower part through the middle hole site of the operation table top from the lead-out cable line, and is combined with a group of switches or power strips through the cable of the heating and heat preservation module 3, and then led out to an external power supply facility.
The frame can be constructed by aluminum profiles, profile steel and the like, and the drawing example is constructed based on the aluminum profiles. And placing the spiral flow die and related experimental equipment, and reserving a cabinet on the right side of the rack so as to facilitate the storage of various experimental articles.
As a further optimization scheme of the material fluidity experiment device based on the spiral runner, in the die system 2, a heating heat preservation pad 207, a heat insulation layer 208 and a protection bottom shell 209 are sequentially buckled on the bottom surface of a lower die plate 206 and locked by fastening screws 210;
the die base is arranged on a leveling base 211 with studs, a lower die plate 206 and an upper die plate 204 are positioned by a positioning pin 205, the upper die plate 204 made of transparent visual PC material, the lower die plate 206 and the upper die plate 204 are locked and fixed by a hexagonal nut 203, and the leveling base 211 with studs is used for leveling the lower die plate 206 and the upper die plate 204;
the conical sprue cup 202 is embedded into a conical hole matched with the upper template 204, and the conical sprue cup 201 is embedded into the conical sprue cup 202;
the flow channel 212 adopts a spiral flow channel, the length of the flow channel is 2000-3500 mm, and the length of the flow channel adopts a scale of 50mm, so that the measurement and the reading of experimental data are facilitated.
As a further optimization scheme of the material fluidity experiment device based on the spiral flow channel, the heating and heat preservation module 3 consists of a heating cabin 403 formed by a heating device and a temperature control unit, a separation net 402 arranged in the heating cabin 403 and a plurality of metal beakers 401 arranged on the separation net 402 in the heating cabin 403 for melting wax materials;
The metal beaker 401 is provided with a long pouring nozzle, the heating cabin body 403 is made of stainless steel materials, the heating device is made of resistance wires, the temperature control unit is used for temperature setting and real-time detection of heating temperature, the target heating temperature is reached, the metal beaker has an automatic heat preservation function, two different liquid wax materials can be arranged in one heating heat preservation module, and the heating heat preservation module can heat at constant temperature or adjust heating temperature.
In order to better achieve the purpose of the invention, the invention also provides a method for installing a mould system of a material fluidity experiment device based on a spiral runner, which comprises the following steps: the method comprises the following steps:
Step one, completing the assembly of the base part of the die, sequentially buckling a heating heat preservation pad 207, a heat insulation layer 208 and a protection bottom shell 209 on the bottom surface of a lower die plate 206, and locking by adopting a fastening screw 210;
Step two, mounting the die base on a leveling base 211 with a stud, mounting an upper template 204 made of transparent visual PC material, positioning a lower template 206 and the upper template 204 by adopting a positioning pin 205, locking the parts by adopting a hexagonal nut 203, and leveling the lower template 206 and the upper template 204 by utilizing the leveling base 211 with the stud;
step three, embedding the conical sprue cup 202 into a conical hole matched with the upper template 204, and embedding the conical sprue cup 201 into the conical sprue cup 202.
The flow channel 212 adopts a spiral flow channel, the length of the flow channel 212 is generally an integer, the length of the flow channel 212 is generally 2000-3500 mm, and the flow channel length adopts a scale of 50mm, so that the measurement and the reading of experimental data are facilitated.
The wax fluidity measurement experiment is carried out by adopting the set of experimental device, the experimental flow is shown in figure 6, the experimental phenomenon is obvious, and the flow and the filling result of the experimental wax are shown in table 1.
The experimental procedure is as follows, the flow experimental facility integrating two sets of experimental facility modular units:
In order to better achieve the purpose of the invention, the invention further provides an experimental method of the material fluidity experimental device based on the spiral flow channel, which comprises the following steps: the method comprises the following steps:
First, experimental preparation: checking experimental equipment, cleaning surface floating dust and sundries such as an experimental device, a runner and the like, switching on a power supply of the experimental equipment, switching on a switch of a heating and heat preserving device, and setting target heating and heat preserving temperature;
secondly, preheating the mould, confirming to switch on the power supply of the experimental equipment, further opening a heating switch of a heating heat preservation pad 207 of the mould system 2, setting target heating and heat preservation temperature, and preheating the mould system 2 to the set temperature;
thirdly, preparing wax: preparing wax according to a required formula, and filling the wax into a metal beaker;
fourth, melting wax: placing a metal beaker filled with wax into a heating and heat preserving device, and heating and melting the wax according to experimental temperature conditions;
Fifth step, pouring the sample: pouring four groups of wax materials with two melted temperature conditions and two formulas into corresponding mold systems 2;
Sixthly, cutting off the power supply: after the pouring experiment process is finished, the power supply of the heating heat preservation pad 207 is cut off in time so that the wax material in the spiral flow channel can be radiated and solidified as soon as possible, and meanwhile, the power supply of the heating heat preservation device is cut off;
seventh, observing experimental phenomena and recording results: observing the surface quality of the obtained sample under different pouring conditions, and recording the filling length of the obtained pouring sample under different pouring conditions;
Eighth step, cleaning wax: after the die system 2 is cooled to room temperature, cleaning the die system 2 and the base platform 1 for waxing, and preparing for the next experiment;
ninth, ending the experiment: and (5) restoring the placement of experimental equipment and tools and finishing the experiment.
Experimental effect and results:
the flowability test was carried out by using the present apparatus, and one set of test results were as follows.
TABLE 1 filling Length results of casting experiments under different formulations
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The material fluidity experimental device based on the spiral runner comprises a basic platform (1), and is characterized by further comprising a mould system (2) and a heating and heat preserving module (3);
The base platform (1) comprises an operation table (501) formed by an operation table surface and a rack, and a storage cabin (502) arranged on one side of the operation table, wherein horizontal adjustment supporting type casters (503) are arranged at four corners of the bottom of the operation table, a sliding frame (504) is arranged below the other side of the operation table, and the storage cabin (502) is used for containing experimental wax materials and experimental tools;
The horizontal adjustment supporting type trundles (503) move and level the frame of the operation table (501) to ensure that the operation table top is kept horizontal;
the sliding frame (504) moves back and forth and left and right so as to adapt to heating and heat-preserving modules (3) with various sizes;
The die system (2) comprises a conical pouring cup (201), a conical pouring cup sleeve (202), a hexagonal nut (203), an upper die plate (204) made of transparent visual PC material, a positioning pin (205), a lower die plate (206) with a spiral runner, a heating heat preservation pad (207), a heat insulation layer (208), a protective bottom shell (209), a fastening screw (210) and a leveling base (211) with a stud;
In the die system (2), the heating and heat-preserving pad (207), the heat-insulating layer (208) and the protective bottom shell (209) are sequentially buckled on the bottom surface of the lower die plate (206) and locked by fastening screws (210); the die base is arranged on a leveling base (211) with a stud, a positioning pin (205) is used for positioning a lower die plate (206) and an upper die plate (204), a hexagonal nut (203) is used for locking and fixing the upper die plate (204) made of transparent visual PC material, the lower die plate (206) and the upper die plate (204), and the leveling base (211) with the stud is used for leveling the lower die plate (206) and the upper die plate (204);
the conical pouring cup sleeve (202) is embedded into a conical hole matched with the upper template (204), and the conical pouring cup (201) is embedded into the conical pouring cup sleeve (202);
The runner (212) adopts a spiral runner, the length of the runner is 2000-3500mm, and graduation marks marked by the fixed length of the runner length are arranged on the outer side of the spiral runner (212) in a surrounding manner;
The heating and heat-preserving module (3) comprises a metal beaker (401), a separation net (402) and a heating cabin body (403), wherein the set temperature range of the heating cabin body (403) is 40-300 ℃, the heating cabin body is used for constant temperature control, and 4 metal beakers can be accommodated once through the separation of the separation net (402);
The heating and heat-preserving module (3) consists of a heating cabin (403) formed by a heating device and a temperature control unit, a separation net (402) arranged in the heating cabin (403) and a plurality of metal beakers (401) for melting wax materials, wherein the metal beakers are arranged on the separation net (402) in the heating cabin (403);
The metal beaker (401) is provided with a long pouring nozzle, the heating cabin body (403) is made of stainless steel materials, the heating device is made of resistance wires, the temperature control unit is used for temperature setting and real-time detection of heating temperature, the target heating temperature is achieved, the metal beaker has an automatic heat preservation function, a plurality of different liquid wax materials can be arranged in one heating heat preservation module, and the heating heat preservation module can heat at constant temperature or adjust heating temperature.
2. The spiral flow channel-based material fluidity experiment device according to claim 1, wherein a heating and heat preserving module (3) is installed on the left side of the frame of the basic platform (1); two groups of mould systems (2) are arranged above the operating table top; the mould system (2) is threaded to the lower part through the middle hole site of the operation table top from the lead-out cable line with the heating and heat preservation module (3), and is combined with a group of switches or power strips and led out to an external power supply facility.
3. A method of installing a mold system for a spiral flow channel-based material flow assay device according to claim 2, comprising the steps of:
Step one, completing the assembly of a die base part, sequentially buckling a heating heat preservation pad (207), a heat insulation layer (208) and a protection bottom shell (209) on the bottom surface of a lower die plate (206), and locking by adopting a fastening screw (210);
Step two, mounting the die base on a leveling base (211) with a stud, mounting an upper template (204) made of transparent visual PC material, positioning a lower template (206) and the upper template (204) by adopting a positioning pin (205), locking the parts by adopting a hexagonal nut (203), and leveling the lower template (206) and the upper template (204) by utilizing the leveling base (211) with the stud;
step three, embedding the conical pouring cup sleeve (202) into a conical hole matched with the upper template (204), and embedding the conical pouring cup (201) into the conical pouring cup sleeve (202).
4. A method of testing a spiral flow channel based material flow testing apparatus as defined in claim 2, comprising the steps of:
First, experimental preparation: checking experimental equipment, cleaning surface floating dust and sundries such as an experimental device, a runner and the like, switching on a power supply of the experimental equipment, switching on a switch of a heating and heat preserving device, and setting target heating and heat preserving temperature;
Secondly, preheating the mould, confirming to switch on a power supply of experimental equipment, and then opening a heating switch of a heating and heat-preserving pad (207) of the mould system (2), setting target heating and heat-preserving temperature, and preheating the mould system (2) to the set temperature;
thirdly, preparing wax: preparing wax according to a required formula, and filling the wax into a metal beaker;
fourth, melting wax: placing a metal beaker filled with wax into a heating and heat preserving device, and heating and melting the wax according to experimental temperature conditions;
Fifth step, pouring the sample: pouring four groups of wax materials with two melted temperature conditions and two formulas into corresponding mould systems (2);
Sixthly, cutting off the power supply: after the pouring experiment process is finished, the power supply of the heating heat preservation pad (207) is cut off in time, so that the wax in the spiral flow channel can be radiated and solidified as soon as possible, and meanwhile, the power supply of the heating heat preservation device is cut off;
seventh, observing experimental phenomena and recording results: observing the surface quality of the obtained sample under different pouring conditions, and recording the filling length of the obtained pouring sample under different pouring conditions;
Eighth step, cleaning wax: after the die system (2) is cooled to room temperature, cleaning the die system (2) and the base platform (1) to wax materials, and preparing for the next experiment;
ninth, ending the experiment: and (5) restoring the placement of experimental equipment and tools and finishing the experiment.
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| CN202111020720.0A CN113804584B (en) | 2021-09-01 | Material fluidity experimental device based on spiral flow channel |
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| CN202111020720.0A CN113804584B (en) | 2021-09-01 | Material fluidity experimental device based on spiral flow channel |
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