CN114211591A - Method for manufacturing hollow porous insect model - Google Patents
Method for manufacturing hollow porous insect model Download PDFInfo
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- CN114211591A CN114211591A CN202111522074.8A CN202111522074A CN114211591A CN 114211591 A CN114211591 A CN 114211591A CN 202111522074 A CN202111522074 A CN 202111522074A CN 114211591 A CN114211591 A CN 114211591A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
Abstract
The invention provides a method for manufacturing a hollow porous insect model, which comprises the steps of manufacturing a mold and pouring the model, wherein the mold is made of silica gel and comprises an upper outer mold, a lower outer mold and an inner mold. Corresponding depressions and protrusions are arranged near four vertex angles of the rectangular upper and lower outer molds so as to improve the fit degree of the upper and lower outer molds of the mold, and the pouring material of the model is formed by mixing silica gel and gypsum powder of the mold according to a certain proportion. The model manufactured by the invention can be hollow, and the surface has certain plastic texture. The manufactured mould has soft texture, is not easy to fall and damage and has certain elasticity. The invention has simple operation and is easy for a model making beginner, and is particularly suitable for teaching exhibition, specimen making and other aspects in the college and university porous insect education career.
Description
Technical Field
The invention belongs to the technical field of model manufacturing, and particularly relates to a manufacturing method of a hollow porous insect model.
Background
Borrelia, a large class of marine protozoa, has continued to date since the emergence of the cambrian. The shell is provided with holes and filled with protoplasm. The protoplasm forms finger-like, leaf-like or needle-like projections on the body surface from deep inside the pores, resembling "pseudopodia", and depends on this for predation and activity. The individual polyporus lucidus is difficult to observe by naked eyes, but in a long history, the polyporus lucidus records important scientific information, has important scientific research significance in a plurality of scientific fields such as ancient climate reconstruction and the like, and is also an important part in a marine food chain.
In the prior art, a mold cannot be used for manufacturing a model according to the shape of a porous insect.
Disclosure of Invention
The invention aims to provide a method for making a model of a commodity such as a teaching aid of porophytes and the like, which is simple to operate, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: a method for manufacturing a hollow porous insect model comprises the following steps:
(1) manufacturing a gypsum internal mold; carving a target-shaped pit with a polypide on the precast slab, pouring the mixed gypsum liquid into the pit, and forming a gypsum internal mold after solidification;
(2) pressing the gypsum internal mold obtained in the step (1) into oil sludge which is wrapped by acrylic building blocks in advance until one side of the gypsum internal mold which is cut and symmetrical along the horizontal longitudinal section of the body length central line is completely immersed, and manufacturing four recesses at four corners of the oil sludge;
(3) adding high-acrylic building blocks on the basis of the product obtained in the step (2) until the high-acrylic building blocks are higher than the gypsum inner film; pouring silica gel liquid into the mould, removing bubbles, and curing to obtain an upper mould of the outer mould;
(4) removing the acrylic building blocks at the bottom of the product obtained in the step (3), removing oil sludge, and then re-assembling the acrylic building blocks; pouring silica gel liquid which is equal to the silica gel liquid in the step (3), discharging air bubbles, and curing to obtain an outer die lower die;
(5) manufacturing an inner mold, manufacturing the outline of the target-shaped porous insect by using plastic soil, wherein the outline of the target-shaped porous insect is required to be small, placing the manufactured target-shaped porous insect plastic soil into an outer mold which is formed by the upper mold of the outer mold in the step (3) and the lower mold of the outer mold obtained in the step (4), injecting silica gel liquid into a gap between the mold and the plastic soil, solidifying and demolding to obtain the inner mold;
(6) and (3) filling oil sludge into the inner mold obtained in the step (5), placing the inner mold into an outer mold synthesized by the upper mold of the outer mold obtained in the step (3) and the lower mold of the outer mold obtained in the step (4), injecting gypsum-silica gel liquid into a gap between the outer mold and the inner mold, and demolding after solidification to obtain the porous insect model with the target shape.
Further, in the step (1), finely carving and trimming the solidified and molded inner die according to the target shape of the holed worms.
Further, the acrylic building blocks in the step (3) are higher than the gypsum inner film by more than 2 cm.
Further, the silica gel liquid is obtained by mixing the mold silica gel and the curing agent according to the proportion of 100: 2-2.5.
Further, the gypsum-silica gel liquid in the step (6) is obtained by mixing and stirring gypsum powder, water and mold silica gel according to the mass ratio of 10: 3: 1.
Further, the step (5) also comprises the step of respectively and uniformly coating a lubricant on the outer die and the plastic soil.
Further, step (5) still includes and places supplementary rod in plastic soil to supplementary rod and outer mould edge's position when the mark horizontal position, then hang the back with supplementary rod, guarantee to mark the position unchangeable.
Further, the step (6) further comprises the steps of placing an auxiliary rod in the oil sludge, marking the positions of the auxiliary rod and the edge of the outer die when the auxiliary rod is in the horizontal position, and then hanging the auxiliary rod to ensure that the marked position is unchanged.
Further, the step (6) also comprises the step of injecting gypsum-silica gel liquid after the outer part of the outer die is bundled.
Has the advantages that: compared with the prior art, the invention fills the blank of the simple manufacturing method of the holed worm model in the field. The method is simple to operate, the efficiency of making the model by the mold is very high, and one gypsum model can be made within 40 minutes without considering the making condition of the mold according to the actual operation experience. In addition, different molding materials can be poured into the mold according to actual needs, and the requirements for manufacturing models made of different materials can be met.
Drawings
In order to more clearly illustrate the invention, the drawings that will be used below are briefly described. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic view of an outer mold and an inner mold according to the present invention.
FIG. 2 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for manufacturing a hollow porous insect model comprises the following steps:
(1) manufacturing a gypsum internal mold; carving a target-shaped pit with a polypide on the precast slab, pouring the mixed gypsum liquid into the pit, and forming a gypsum internal mold after solidification;
(2) pressing the gypsum internal mold obtained in the step (1) into oil sludge which is wrapped by acrylic building blocks in advance until one side of the gypsum internal mold which is cut and symmetrical along the horizontal longitudinal section of the body length central line is completely immersed, and manufacturing four recesses at four corners of the oil sludge;
(3) adding high-acrylic building blocks on the basis of the product obtained in the step (2) until the high-acrylic building blocks are higher than the gypsum inner film; pouring silica gel liquid into the mould, removing bubbles, and curing to obtain an upper mould of the outer mould;
(4) removing the acrylic building blocks at the bottom of the product obtained in the step (3), removing oil sludge, and then re-assembling the acrylic building blocks; pouring silica gel liquid which is equal to the silica gel liquid in the step (3), discharging air bubbles, and curing to obtain an outer die lower die;
(5) manufacturing an inner mold, manufacturing the outline of the target-shaped porous insect by using plastic soil, wherein the outline of the target-shaped porous insect is required to be small, placing the manufactured target-shaped porous insect plastic soil into an outer mold which is formed by the upper mold of the outer mold in the step (3) and the lower mold of the outer mold obtained in the step (4), injecting silica gel liquid into a gap between the mold and the plastic soil, solidifying and demolding to obtain the inner mold;
(6) and (3) filling oil sludge into the inner mold obtained in the step (5), placing the inner mold into an outer mold synthesized by the upper mold of the outer mold obtained in the step (3) and the lower mold of the outer mold obtained in the step (4), injecting gypsum-silica gel liquid into a gap between the outer mold and the inner mold, and demolding after solidification to obtain the porous insect model with the target shape.
In the implementation, the preparation method also comprises the preparation of materials in advance, which comprise a foam board (for engraving) with the size of 30CM x 10CM, gypsum powder for making an inner mold and a model, mold silica gel 881 and silica gel curing agent for making the mold, enough acrylic building blocks, a certain amount of plastic soil and several snow sticks, soft oil sludge, vaseline and a small brush, a pen (or a thin column with the diameter of about 1.5CM which can be used for punching), an injector, a series of model engraving tools for stirring, containing and grinding, and a device with an adjustable height rack or a suspendable object.
In this embodiment, in step (1), the solidified gypsum internal mold is finely carved and trimmed according to the target shape of the porous insects. Specifically, a recess similar to the shape of the target-shaped porous insect is formed in the center of a foam board with the size of about 30CM x 10CM, and the depth of the recess is about 5 CM. The depression is carved with the rough outline of the targeted porous insect and the rough details of its surface. According to the mass ratio of water to gypsum powder being 3:10, mixed gypsum liquid is prepared and poured into the foam board. And after the gypsum is completely solidified, finely carving and finishing the formed gypsum body. Note that the time for initial setting of the gypsum is approximately 8 minutes, and if final setting is desired, half an hour.
In the embodiment, according to the size of the gypsum internal mold, a piece of soft oil sludge block which is at least 3CM longer than the length, width and height of the gypsum internal mold is selected, the oil sludge is tightly surrounded and attached by acrylic building blocks, and the foundation is continuously built, so that the building is completed by two to three layers. Pressing the gypsum internal mold into the oil sludge, wherein the pressing depth is as follows: the oil sludge happens to surround one side of the gypsum internal mold which is cut symmetrically along the horizontal longitudinal section of the body length central line. After the plaster mold is pressed in, the depth and the position of the plaster inner mold are slightly fixed by one hand, and the raised soft oil mud surface is slightly pressed flat by the other hand. Then a small brush or an elongated cylindrical object (such as a pen) is used to make a depression about 1CM deep around each of the four corners of the sludge with little force. And (4) continuing to build the building block by using acrylic building blocks until the stacking height of the acrylic layer is at least 2CM higher than the highest surface of the gypsum internal mold protruding from the surface of the cement. Finally, the Vaseline is smeared on the greasy dirt surface and the plaster surface exposed in the air and the four surfaces in the acrylic cube by using a small brush.
Silica gel liquid is poured into the acrylic cube, and the requirement of the silica gel amount is as follows: the highest point of the silica gel surface is ensured not to exceed 1/2 of the height of the topmost building block, but the silica gel is required to completely submerge the plaster mold. Wherein the silica gel liquid is prepared by mixing the mold silica gel and the curing agent according to the proportion of 100: 2-2.5, stirring for about 30 seconds or even pouring the silica gel into the cube after partial silica gel begins to solidify. After pouring, both hands are needed to support the oil sludge and grasp the acrylic building blocks, and the table top or the cement-built fence is slightly smashed forcefully after the acrylic building blocks are lifted slightly in the vertical direction so as to drain bubbles in the silica gel. And when the plaster mold is horizontally placed, the silica gel surface is horizontal and no protrusion or similar phenomenon of the plaster mold can be seen.
The time for the initial curing of the silica gel is generally half an hour, and the curing speed is accelerated by higher ambient temperature or the addition of the curing agent. After the silica gel is solidified, the building blocks at the bottom can be dismantled, the soft oil mud is taken out, the molding of the male surface can be seen, the dismantled acrylic building blocks are installed again, vaseline is smeared again at the place, and the silica gel mold at the other side is manufactured. The silica gel is only required to be poured, and the required amount of the silica gel is as above.
In another embodiment, the mold may be trimmed and the assembled building blocks may be removed after the silica gel is cured. And taking out the gypsum internal mold, and trimming an injection port on the upper external mold or the lower external mold of the silica gel mold according to actual needs. The size of the injection port is required to be proper, and about 1.5CM by 0.8CM is enough. The residual oil sludge on the die is wiped clean, and the die can be used.
In the embodiment, the softer silicone material is selected for manufacturing the inner mold. In order to be convenient to take out, a silica gel film with proper thickness is required to be made. After the mold is manufactured, proper amount of plastic soil is selected and kneaded into the approximate outline of the target manufacturing object, and the ice cream stick is required to be inserted into the plastic soil, so that the plastic soil is taken out conveniently in the later period.
When the plastic soil is manufactured, the plastic soil is smaller than the outline in the outer mold, the whole plastic soil is about 1.5CM smaller, and meanwhile, the plastic soil with the thickness of 1CM is paved on the silica gel outer mold smeared with Vaseline in advance. Note that both must be air dried, otherwise they will fuse together; and the moldable soil on the mold should follow the contours on the mold as closely as possible. Smearing Vaseline on the plastic soil blocks inserted with the ice cream sticks, placing the ice cream sticks into a silica gel outer mold padded with the plastic soil, checking whether gaps of 1CM are left between the plastic soil blocks before the silica gel outer mold is closed, and marking the intersection of the ice cream sticks and the outer edge of the silica gel outer mold with the gaps of 1 CM. And finally, hanging the ice cream stick to enable the red line to coincide with the outer edge of the silica gel outer mold. The hanging height should not be too high, and the silica gel outer mold should still be placed on the table top or the ground. Injecting the liquid mixed according to the proportion of 100: 2-2.5 of the silica gel and the curing agent of the mold along the injection port until the reserved gap in the silica gel outer mold is filled. And drying to obtain the inner die.
The general mode of the successfully manufactured upper and lower outer dies and the inner core thereof is shown in the attached figure 1.
Using the mould to make a model:
and taking out the plastic soil blocks on the inner mold in the last step, taking out the molded silica gel layer inner mold, removing the plastic soil blocks wrapped in the silica gel layer inner mold by using hot water, and putting soft mud into the silica gel layer inner mold. Then the mould is closed and suspended continuously, the height requirement is the same to the red line, and the outer mould can not leave the ground or the table top.
Taking a certain amount of molding silica gel and gypsum powder, and mixing and stirring the molding silica gel and the gypsum powder according to the proportion. And then poured into the previously bundled outer mold. It should be noted that the binding mold is an outer mold for secondary attachment to ensure that the molding material does not leak out before solidification. After the mixed liquid is approximately solidified in the mould, the mould can be opened, and the model is placed under the sunshine and is sunned, so that the model is quickly and completely solidified.
When the mold is taken out, the oil sludge block is taken out firstly, and then the silica gel inner mold is carefully pulled out. The remaining final set solid is perforated to form a hollow model of marine protozoan foramen.
In this embodiment, the gypsum-silica gel solution is prepared by mixing and stirring gypsum powder, water and mold silica gel in a mass ratio of 10: 3: 1.
The invention provides a method for simply manufacturing a hollow marine protozoan holed worm model. The method comprises the steps of manufacturing the mold with the porous insects and pouring the model. The manufacturing of the mould comprises the manufacturing of the inner mould and the inner mould.
The implementation process of the invention is as follows:
(1) the material required for making the mold is first prepared.
Foam boards (for engraving) of size 30CM by 10CM, gypsum powder for making inner molds and molds, mold silicone 881 and silicone setting agent for making molds, sufficient acrylic building blocks, a quantity of moldable soil and several snow sticks, soft sludge, petrolatum and small brushes, a pen (or a fine column of about 1.5CM in diameter that can be used for drilling), syringes and a series of model engraving tools for stirring, holding and polishing, and a height adjustable stand or a device for hanging objects.
(2) And (5) manufacturing the gypsum internal mold.
A recess similar to the outer shape of the object to be produced is formed in the center of a foam board having a size of about 30CM by 10CM, and the recess is about 5CM deep. The depression is carved with the rough outline of the targeted porous insect and the rough details of its surface. According to the mass ratio of water to gypsum powder being 3:10, mixed gypsum liquid is prepared and poured into the foam board. And after the gypsum is completely solidified, finely carving and finishing the formed gypsum body. Note that the time for initial setting of the gypsum is approximately 8 minutes, and if final setting is desired, half an hour.
(3) Preparation before the preparation of the silica gel mold.
According to the size of the plaster model, selecting a soft oil sludge block which is at least 3CM longer than the length, width and height of the plaster model, tightly surrounding and adhering the oil sludge by acrylic building blocks, and continuously building the foundation to obtain the plaster model with two to three layers. Pressing a plaster mold into the oil sludge, wherein the pressing depth is as follows: the oil sludge happens to surround one side of the gypsum porous insect inner mold which is cut symmetrically along the horizontal longitudinal section of the body length central line. After the plaster mold is pressed in, the depth and the position of the plaster mold are slightly fixed by one hand, and the raised soft clay surface is slightly pressed flat by the other hand. Then a small brush or an elongated cylindrical object (such as a pen) is used to make a depression about 1CM deep around each of the four corners of the sludge with little force. And (4) continuing to build the plaster mould by using acrylic building blocks until the superposed height of the acrylic layer is at least 2CM higher than the highest surface of the plaster mould protruding from the plaster surface. Finally, the Vaseline is smeared on the greasy dirt surface and the plaster surface exposed in the air and the four surfaces in the acrylic cube by using a small brush.
(4) Estimation of the amount of silica gel and making a half silica gel mold.
The amount of silica gel required to fill the acrylic cube was estimated visually. The requirements for the amount of silica gel are: the highest point of the silica gel surface is ensured not to exceed 1/2 of the height of the topmost building block, but the silica gel is required to completely submerge the plaster mold. Mixing the silica gel and the curing agent according to the proportion of 100: 2-2.5, fully stirring for about 30 seconds or observing that part of the silica gel begins to solidify, and then uniformly pouring the silica gel into the cube. After pouring, both hands are needed to support the oil sludge and grasp the acrylic building blocks, and the table top or the cement-built fence is slightly smashed forcefully after the acrylic building blocks are lifted slightly in the vertical direction so as to drain bubbles in the silica gel. And when the plaster mold is horizontally placed, the silica gel surface is horizontal and no protrusion or similar phenomenon of the plaster mold can be seen.
The time for the initial curing of the silica gel is generally half an hour, and the curing speed is accelerated by higher ambient temperature or the addition of the curing agent. After the silica gel is solidified, the building blocks at the bottom can be dismantled, the soft oil mud is taken out, the molding of the male surface can be seen, the dismantled acrylic building blocks are installed again, vaseline is smeared again at the place, and the silica gel mold at the other side is manufactured. The silica gel is only required to be poured, and the required amount of the silica gel is as above.
(5) And (5) trimming the die.
After the silica gel is solidified, the assembled building blocks can be detached. And taking out the gypsum internal mold, and trimming an injection port on the upper external mold or the lower external mold of the silica gel mold according to actual needs. The size of the injection port is required to be proper, and about 1.5CM by 0.8CM is enough. The residual oil sludge on the die is wiped clean, and the die can be used.
(6) And (5) manufacturing an inner die.
The inner mould is made of softer silica gel material. In order to be convenient to take out, a silica gel film with proper thickness is required to be made. After the mold is manufactured, proper amount of plastic soil is selected and kneaded into the approximate outline of the target manufacturing object, and the ice cream stick is required to be inserted into the plastic soil, so that the plastic soil is taken out conveniently in the later period.
When the plastic soil is manufactured, the plastic soil is smaller than the outline in the mold, the whole plastic soil is about 1.5CM smaller, and meanwhile, the plastic soil with the thickness of 1CM is paved on the silica gel mold smeared with vaseline in advance. Note that both must be air dried, otherwise they will fuse together; and the moldable soil on the mold should follow the contours on the mold as closely as possible. Smearing Vaseline on the plastic soil blocks inserted with the ice cream stick, placing the ice cream stick in a silica gel mold filled with the plastic soil, checking whether gaps of 1CM are left between the plastic soil blocks before the mold is closed, and marking the intersection of the ice cream stick and the outer edge of the mold with the gaps of 1 CM. And finally, hanging the ice cream stick to enable the red line to coincide with the outer edge of the mould. The hanging height should not be too high and the mould should still be placed on a table top or the ground. Injecting the liquid mixed according to the proportion of 100: 2-2.5 of the silica gel and the curing agent of the mold along the injection port until the reserved gap in the mold is filled. And drying the mixture.
The general mode of the successfully manufactured upper and lower outer dies and the inner core thereof is shown in the attached figure 1.
(7) And (4) manufacturing a molding material and a model.
And taking out the plastic soil blocks on the mould in the previous step, taking out the formed silica gel layer, removing the plastic soil blocks wrapped in the silica gel layer by using hot water, and putting soft mud into the silica gel layer. Then the mould is closed and suspended continuously, the height requirement is the same to the red line, and the mould can not leave the ground or the table top.
Taking a certain amount of molding silica gel and gypsum powder, and mixing and stirring according to the approximate mass ratio of the gypsum powder, water and the mold silica gel of 10: 3: 1. And then poured into a previously bundled silica gel mold. It should be noted that the binding mold is a mold for secondary attachment to ensure that the molding material does not leak out before solidification. After the mixed liquid is approximately solidified in the mould, the mould can be opened, and the model is placed under the sunshine and is sunned, so that the model is quickly and completely solidified.
When the model is taken out, the oil sludge block needs to be taken out firstly, and then the silica gel membrane needs to be carefully pulled out. The remaining final set solid is perforated to form a hollow model of marine protozoan foramen.
The invention discloses the following technical effects: the mould and the technique that this embodiment provided can be used to the preparation of goods such as poroid teaching aid, exhibit. The mold is soft in texture, simple to operate in mold manufacturing and easy to disassemble, and the surface of the mold manufactured by the molding material has certain frosted feeling, so that the possibility is provided for simple manufacturing and popularization of the porous insect mold. The model can be hollow and has a certain plastic texture on the surface. The manufactured mould has soft texture, is not easy to fall and damage and has certain elasticity. The invention has simple operation and easy model making novice, and is particularly suitable for teaching exhibition, specimen making and other aspects of the college and university porous insect education career
The above-described embodiments are only intended to illustrate one of the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims.
Claims (9)
1. The manufacturing method of the hollow porous insect model is characterized by comprising the following steps:
(1) manufacturing a gypsum internal mold; carving a target-shaped pit with a polypide on the precast slab, pouring the mixed gypsum liquid into the pit, and forming a gypsum internal mold after solidification;
(2) pressing the gypsum internal mold obtained in the step (1) into oil sludge which is wrapped by acrylic building blocks in advance until one side of the gypsum internal mold which is cut and symmetrical along the horizontal longitudinal section of the body length central line is completely immersed, and manufacturing four recesses at four corners of the oil sludge;
(3) adding high-acrylic building blocks on the basis of the product obtained in the step (2) until the high-acrylic building blocks are higher than the gypsum inner film; pouring silica gel liquid into the mould, removing bubbles, and curing to obtain an upper mould of the outer mould;
(4) removing the acrylic building blocks at the bottom of the product obtained in the step (3), removing oil sludge, and then re-assembling the acrylic building blocks; pouring silica gel liquid which is equal to the silica gel liquid in the step (3), discharging air bubbles, and curing to obtain an outer die lower die;
(5) manufacturing an inner mold, manufacturing the outline of the target-shaped porous insect by using plastic soil, wherein the outline of the target-shaped porous insect is required to be small, placing the manufactured target-shaped porous insect plastic soil into an outer mold which is formed by the upper mold of the outer mold in the step (3) and the lower mold of the outer mold obtained in the step (4), injecting silica gel liquid into a gap between the mold and the plastic soil, solidifying and demolding to obtain the inner mold;
(6) and (3) filling oil sludge into the inner mold obtained in the step (5), placing the inner mold into an outer mold synthesized by the upper mold of the outer mold obtained in the step (3) and the lower mold of the outer mold obtained in the step (4), injecting gypsum-silica gel liquid into a gap between the outer mold and the inner mold, and demolding after solidification to obtain the porous insect model with the target shape.
2. The method for making a hollow porous insect model according to claim 1, wherein in the step (1), the solidified gypsum inner mold is finely carved and trimmed according to the target shape of the porous insect.
3. The method for manufacturing the hollow porous insect model according to claim 1, wherein the acrylic building blocks in the step (3) are higher than the gypsum inner film by more than 2 cm.
4. The method for making the hollow porous insect model according to claim 1, wherein the silica gel liquid is obtained by mixing mold silica gel and a curing agent according to a ratio of 100: 2-2.5.
5. The method for making the hollow porous insect model according to claim 1, wherein the gypsum-silica gel liquid in the step (6) is obtained by mixing and stirring gypsum powder, water and mold silica gel according to a mass ratio of 10: 3: 1.
6. The method as claimed in claim 1, wherein the step (5) further comprises applying a lubricant uniformly on the outer mold and the moldable soil, respectively.
7. The method for making the hollow porous insect model according to claim 6, wherein the step (5) further comprises placing an auxiliary stick in the plastic soil, marking the position of the auxiliary stick and the edge of the outer mold when the auxiliary stick is in the horizontal position, and then hanging the auxiliary stick to ensure that the marked position is unchanged.
8. The method for manufacturing the hollow porous insect model according to claim 1, wherein the step (6) further comprises the steps of placing an auxiliary rod in the oil sludge, marking the position of the auxiliary rod and the edge of the outer mold when the auxiliary rod is in the horizontal position, and then hanging the auxiliary rod to ensure that the marked position is unchanged.
9. The method for making the hollow porous insect model according to claim 8, wherein the step (6) further comprises the step of injecting gypsum-silica gel liquid after the outer mold is bundled.
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