CN114951555B - Tandem type water-soluble sand core mould and manufacturing method thereof - Google Patents
Tandem type water-soluble sand core mould and manufacturing method thereof Download PDFInfo
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- CN114951555B CN114951555B CN202210465798.1A CN202210465798A CN114951555B CN 114951555 B CN114951555 B CN 114951555B CN 202210465798 A CN202210465798 A CN 202210465798A CN 114951555 B CN114951555 B CN 114951555B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 239000000306 component Substances 0.000 claims abstract description 78
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000008358 core component Substances 0.000 claims abstract description 6
- 230000002787 reinforcement Effects 0.000 claims description 77
- 239000004576 sand Substances 0.000 claims description 71
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 67
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 67
- 230000003014 reinforcing effect Effects 0.000 claims description 60
- 230000006835 compression Effects 0.000 claims description 38
- 238000007906 compression Methods 0.000 claims description 38
- 238000002360 preparation method Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 10
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 11
- 239000002131 composite material Substances 0.000 abstract description 8
- 238000004804 winding Methods 0.000 abstract description 7
- 210000001503 joint Anatomy 0.000 abstract description 4
- 238000000275 quality assurance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/103—Multipart cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
- B22C1/2206—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/106—Vented or reinforced cores
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to a serial water-soluble sand core mould and a manufacturing method thereof, belonging to the field of design and manufacturing of fiber composite material core moulds. All the components are bonded and manufactured, and the forming process is simple. The cured sand core components have high strength, high modulus and high temperature resistance. Each component of the column section is provided with a mounting and positioning straight opening, and the column section is bonded and fixed for use after butt joint. The front end enclosure, the column section and the rear end enclosure ensure the coaxiality of the front and rear polar holes and the core mould through the core mould shaft, and the front and rear polar holes and the core mould are spliced into a cylindrical gas cylinder core mould with end enclosures at two ends. The mandrel is of a serial sectional structure, so that the problems of difficult operation and difficult quality assurance during operation of the whole tool manufactured by the tool are avoided, the tool cost is saved, the processing is easy, the efficiency is high, the bearing requirement and the temperature requirement during winding and forming of the fiber composite material can be met, and water-soluble removal, demoulding and easy operation can be performed after forming and curing.
Description
Technical Field
The invention belongs to the technical field of fiber composite material core dies, and particularly relates to a serial water-soluble sand core die and a manufacturing method thereof.
Background
Fiber composite cylindrical gas cylinders are increasingly used in various industries due to their excellent characteristics of light weight, high strength and corrosion resistance. At present, the forming of the composite material gas cylinder is mostly carried out on a metal material lining with certain strength, the manufacturing process of the metal lining is complex and high in cost, and the thinner metal lining is easy to deform in the forming process, and particularly when the weight requirement of the gas cylinder is severe, the column Duan Jiaochang and the two ends are provided with unequal polar holes, the application of the metal lining is more limited and even cannot be implemented.
For the small-size gas cylinder, an integral core mold can be adopted, but for the larger or longer cylindrical gas cylinder, the tooling of the integral core mold has high manufacturing cost, heavy weight, difficult operation and implementation, difficult quality assurance of the core mold and low disposable yield. The requirement of sectional design is provided for the core mould design of the cylindrical gas cylinder made of the fiber composite material, so that the core mould can meet the bearing requirement and the temperature requirement when the fiber is continuously wound and formed.
Disclosure of Invention
In view of the above, the invention aims to provide a serial water-soluble sand core mould and a manufacturing method thereof, which are used for solving the problems that for a larger or longer cylindrical gas cylinder, the tooling cost of the integral core mould is high, the integral core mould is heavy, the operation and implementation are difficult, the quality of the core mould is difficult to ensure, and the disposable yield is low.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the preparation method of the tandem type water-soluble sand core mould specifically comprises the following steps:
(1) Preparing a front seal head, wherein the front seal head is manufactured by a front seal head forming tool, fixing a front seal head bottom die and a front seal head core die shaft through nuts, filling polyvinyl alcohol river sand uniformly mixed in proportion, and compacting; the profile and thickness of the core mold are ensured by a mold cavity between a front end enclosure inner core and a front end enclosure bottom mold, the front end enclosure inner core is seated on a matching step of a front end enclosure core mold shaft, and an inner straight opening of the front end enclosure is prepared by an inner straight opening compression ring and a front end enclosure cover plate;
(2) Preparing a rear seal head, wherein the rear seal head is manufactured by a rear seal head forming tool, fixing a rear seal head bottom die and a rear seal head core die shaft through nuts, filling polyvinyl alcohol river sand uniformly mixed in proportion, and compacting; the profile and thickness of the core mold are ensured by a mold cavity between the inner core of the rear end enclosure and the bottom mold of the rear end enclosure, the inner core of the rear end enclosure is seated on a matched step of a core mold shaft of the rear end enclosure, and an outer straight opening of the rear end enclosure is prepared by an outer straight opening compression ring and a cover plate of the rear end enclosure.
(3) Preparing a column segment reinforcing piece, wherein the column segment reinforcing piece is manufactured by a column segment reinforcing piece tool, fixing a column segment reinforcing piece bottom die and a column segment reinforcing piece core die shaft through nuts, filling polyvinyl alcohol river sand uniformly mixed in proportion, and compacting; the thickness of the column section reinforcing piece and the inner straight opening are ensured by a column section reinforcing piece panel, a column section reinforcing piece cover plate and a column section reinforcing piece bottom die, and the outer straight opening is ensured by a column section reinforcing piece bottom die surface;
(4) Preparing a column section part, wherein the column section part is manufactured by a column section part tool, a column section part bottom die and a column section part core die shaft are fixed through nuts, then polyvinyl alcohol river sand uniformly mixed in proportion is filled in the column section part, the column section part is compacted, the thickness and the inner straight opening of the column section part are ensured by a die cavity between a column section part panel, a column section part cover plate and the column section part bottom die, and the outer straight opening is ensured by a column section part bottom die surface;
(5) The front seal head (1), the N column section components and the rear seal head are sequentially connected in series, a mandrel shaft penetrates through the middle of the front seal head, the front pole hole, the rear pole hole and the mandrel are guaranteed to be coaxial through the mandrel shaft, and the column section reinforcing piece is installed at a stress weak position of the column section components in series in a combined mode according to the size and stress conditions of the gas cylinder.
Further, the specific method in the step (1) is as follows: the bottom fastening thread of the front end socket mandrel shaft penetrates into the front end socket bottom die positioning hole, after the bottom die positioning surface of the front end socket mandrel shaft and the front end socket bottom die are positioned, the bottom nut is screwed, the 80-nut river sand and the polyvinyl alcohol are uniformly mixed according to the proportion of 7:1, the front end socket bottom die is filled with the uniformly mixed polyvinyl alcohol river sand in proportion, the mixture is compacted and filled to the position of the front end socket inner core positioning table, the fastening threaded hole of the front end socket inner core is screwed with the lifting ring, the front end socket inner core is lifted and placed on the front end socket inner core positioning table through the lifting ring, the upper nut is screwed in the fastening thread of the upper end of the front end socket mandrel shaft, and the front end socket inner core is fixed; continuously filling polyvinyl alcohol river sand, compacting, and filling the mixture to the position of the straight opening of the inner core of the front seal head; and (3) installing an inner straight-mouth compression ring of the front seal head, continuously filling polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the upper end face of the inner straight-mouth compression ring. Screwing off a lifting ring of the inner core of the front end enclosure, installing a front end enclosure cover plate, screwing in an inner fastening bolt and an outer fastening bolt, and respectively matching and fixedly connecting the front end enclosure cover plate with a positioning table of the inner core of the front end enclosure, an inner straight-mouth compression ring and a bottom die of the front end enclosure; removing the inner fastening bolt and the outer fastening bolt after curing is finished, taking down the front end enclosure cover plate, removing the upper nut, screwing the lifting ring into the front end enclosure inner core, and removing the inner straight-mouth compression ring and the front end enclosure inner core; and removing the bottom nut, taking down the core mold shaft of the front end enclosure, taking out the sand core component of the front end enclosure, and processing the surface until the surface is smooth and flat to finish the forming and manufacturing of the front end enclosure.
Further, the specific method of the step (2) is as follows: the bottom fastening thread of the rear end socket of the core mold shaft of the rear end socket tool penetrates into the positioning hole of the rear end socket bottom mold, and after the bottom surface of the rear end socket positioning shaft and the bottom mold are positioned, the bottom nut is screwed; uniformly mixing the 80-mother river sand and the polyvinyl alcohol according to the ratio of 7:1, filling the polyvinyl alcohol river sand uniformly mixed according to the ratio into a bottom die of the rear end socket, compacting, and filling the mixture into the position of an inner core positioning table of the rear end socket; a lifting ring is screwed into a fastening threaded hole of the inner core of the rear end enclosure, the inner core of the rear end enclosure is lifted and placed on a positioning table 35 filled with the inner core of the rear end enclosure through the lifting ring, an upper nut is screwed into a fastening threaded hole at the upper part of the rear end enclosure of the core mold shaft of the rear end enclosure tool, and the inner core of the rear end enclosure is fixed; continuously filling polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the position of the positioning table of the straight-mouth compression ring of the rear seal head; installing an outer straight-mouth compression ring of the rear sealing head, continuously filling polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the upper end face of the outer straight-mouth compression ring; the lifting ring of the inner core of the rear end enclosure is unscrewed, a rear end enclosure cover plate is installed, an inner fastening bolt is screwed in to connect the inner fastening threaded hole of the inner core of the rear end enclosure and the outer fastening through hole of the rear end enclosure cover plate, an outer fastening bolt is screwed in to connect the outer fastening threaded hole of the outer core of the rear end enclosure and the outer fastening through hole of the rear end enclosure cover plate, and the positioning surface of the rear end enclosure cover plate is matched and fixedly connected with the positioning surfaces of the inner core of the rear end enclosure, the outer straight-mouth compression ring and the positioning platform of the rear end enclosure cover plate of the bottom die of the rear end enclosure respectively; removing the inner fastening bolt and the outer fastening bolt after curing is finished, taking down the rear end socket cover plate and the outer straight-port compression ring, removing the upper nut, screwing the lifting ring into the rear end socket inner core, and removing the rear end socket inner core; and removing the bottom nut, taking down the mandrel shaft of the back end socket tool, taking out the sand core part of the back end socket, and processing the surface to be smooth and flat to finish the molding and manufacturing of the back end socket.
Further, the specific method of the step (3) is as follows: the bottom fastening thread of the column segment reinforcing member tooling mandrel shaft penetrates into the column segment reinforcing member bottom die positioning hole, and after the column segment reinforcing member bottom die positioning surface and the column segment reinforcing member bottom die positioning, the bottom nut is screwed; uniformly mixing 80 mother river sand and polyvinyl alcohol according to the ratio of 7:1, filling the polyvinyl alcohol river sand uniformly mixed according to the ratio into a column segment reinforcement bottom die, compacting, and filling the column segment reinforcement bottom die into the position of a column segment reinforcement panel positioning table of the column segment reinforcement inner core; a lifting ring is screwed into a fastening threaded hole of the column section reinforcement panel, the column section reinforcement panel is lifted and placed on a column section reinforcement panel positioning table through the lifting ring, an upper nut is screwed into a fastening threaded hole at the upper end of a column section reinforcement tooling mandrel shaft, and the column section reinforcement panel is fixed; continuously filling polyvinyl alcohol river sand, compacting, and filling the river sand to the upper end face of the column section reinforcement panel; the lifting ring on the column section reinforcement panel is unscrewed, the column section reinforcement cover plate is installed, the inner fastening bolt and the outer fastening bolt of the column section reinforcement are screwed in, and the column section reinforcement cover plate is matched and fixedly connected with the positioning tables on the column section reinforcement panel and the column section reinforcement bottom die respectively; removing the inner fastening bolt and the outer fastening bolt after curing is finished, taking down the column section reinforcement cover plate, removing the upper nut, screwing the lifting ring into the column section reinforcement panel, and removing the column section reinforcement panel; removing the bottom nut, taking down the tooling mandrel shaft of the column segment reinforcing member, taking out the column segment reinforcing sand core part, and processing the surface to be smooth and flat to finish the molding and manufacturing of the column segment reinforcing member; repeating the operation to finish the molding and manufacturing of the required number of column segment reinforcements.
Further, the specific method in the step (4) is as follows: the bottom fastening thread of the column part tooling mandrel shaft penetrates into the column part bottom die positioning hole, and after the column part bottom die positioning surface and the column part bottom die positioning, the bottom nut is screwed; placing a column section component inner core, positioning through a central hole and a column section component tooling mandrel shaft, screwing in a lifting ring at a fastening threaded hole of a column section component panel, lifting and placing the column section component panel on the column section component inner core through the lifting ring, positioning a column section component panel positioning table and the column section component inner core in a matched manner with a panel positioning groove, screwing in an upper nut at the upper end fastening threaded hole of the column section component tooling mandrel shaft, and fixing the column section component panel; uniformly mixing the 80-mother river sand and the polyvinyl alcohol according to the proportion of 7:1, filling the uniformly mixed polyvinyl alcohol river sand in a die cavity formed by the column section component bottom die, the column section component inner core and the column section component panel, compacting, and filling the mixture in the upper end face of the column section component panel; the lifting ring of the column section part panel is unscrewed, the column section part cover plate is installed, the column section reinforcing part fastening bolt and the external fastening bolt are screwed in, and the column section part cover plate is matched and fixedly connected with the positioning tables of the column section part panel and the column section part bottom die respectively; removing the inner fastening bolt and the outer fastening bolt after curing is finished, taking down the column section part cover plate, removing the upper nut, screwing in the lifting ring on the column section part panel, removing the column section part panel, taking out the column section part inner core, removing the bottom nut, taking down the column section part tooling mandrel shaft, taking out the column section sand core part, and finishing the forming and manufacturing of the column section part by processing the surface to be smooth and flat; repeating the operation to finish the molding and manufacturing of the column section parts with the required number.
Further, the specific method of the steps is as follows: penetrating a mandrel shaft into the center of the column section assembly, installing a rear sealing head, wherein the circumferential positioning of the rear sealing head is realized through the matching of a long round through hole at the bottom and a long round positioning column section of the mandrel shaft, and the axial positioning of the mandrel shaft is realized through a positioning surface at the rear end of a column of the mandrel shaft; the front seal head is installed, the circumferential positioning of the front seal head is realized through the matching of a long round through hole at the bottom and a long round positioning column section of the mandrel shaft, and the axial positioning of the mandrel shaft is realized through a cylindrical front end positioning surface of the mandrel shaft; and (3) bonding the straight opening of the front seal head, the straight opening of the column section assembly and the straight opening of the rear seal head by using a polyvinyl alcohol adhesive, and curing and then treating the bonding surface until the bonding surface is smooth and flat to finish the manufacturing of the serial water-soluble sand core mould.
The tandem type water-soluble sand core mould prepared by the preparation method of the tandem type water-soluble sand core mould comprises a front end socket, a rear end socket, N column section components, column section reinforcing pieces and a core mould shaft, wherein the front end socket, the N column section components, the N column section reinforcing pieces and the rear end socket ensure the coaxiality of a front pole hole, a rear pole hole and the core mould through the core mould shaft, and the front end socket, the rear end socket, the N column section components, the N column section reinforcing pieces and the rear end socket are spliced into a cylindrical gas cylinder core mould with end sockets in series.
Furthermore, the front end and the rear end of the mandrel shaft are in a long round structure form with flat surfaces, and the middle section is a cylinder.
Furthermore, the central hole of the column section reinforcing piece is matched with the cylindrical surface of the core mold shaft, the oblong holes of the front end socket and the rear end socket are matched with the oblong sections at the two ends of the core mold shaft, and coaxiality of the whole column-shaped gas cylinder core mold with the end socket is realized.
Further, each component is made by bonding water-soluble adhesive polyvinyl alcohol.
Compared with the prior art, the serial water-soluble sand core mould and the manufacturing method thereof have the beneficial effects that:
(1) The front end enclosure, the column section and the rear end enclosure ensure the coaxiality of the front and rear polar holes and the core mould through the core mould shaft, and are spliced into a cylindrical gas cylinder core mould with end enclosures at two ends. The long round holes of the front end socket and the rear end socket are matched with long round sections at two ends of the mandrel shaft, so that coaxiality of the whole cylindrical gas cylinder mandrel with the end socket is realized, and in the fiber winding forming process, when the X shaft rotates, rotation and sliding do not occur between the sand mandrel and the mandrel shaft, and the integrity is better.
(2) The serial water-soluble sand core mould is of a serial sectional structure, so that the problems that the tool manufactured by the whole tool is large, heavy and expensive, and the operation of forming sand core parts is difficult to operate and difficult to ensure quality are avoided, the forming is simple, the cost of the tool is saved, the processing is easy, the efficiency is high, the bearing requirement and the temperature requirement of the fiber composite material during winding forming can be met, and the water-soluble removal, the demoulding and the operation are easy after the forming and solidification can be carried out.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a cross-sectional view of a construction apparatus for a tandem water-soluble sand core mold according to the present invention;
fig. 2 is a cross-sectional structure diagram of a front end socket tool of a preparation device of a tandem water-soluble sand core mould;
fig. 3 is a cross-sectional structure diagram of a rear end socket tool of a preparation device of a tandem water-soluble sand core mould;
FIG. 4 is a cross-sectional structural view of a column segment reinforcement tooling of a preparation device of a tandem water-soluble sand core mold according to the invention;
FIG. 5 is a cross-sectional structural view of a column segment component tooling of a preparation device of a tandem water-soluble sand core mold according to the invention;
fig. 6 is a schematic diagram of a mandrel shaft of a back end socket tool of a preparation device of a tandem water-soluble sand mandrel according to the invention;
fig. 7 is a schematic cross-sectional structure of a rear end socket core of a device for preparing a tandem water-soluble sand core according to the present invention;
FIG. 8 is a top view of a bottom mold structure of a device for making a tandem water soluble sand core mold according to the present invention;
FIG. 9 is a schematic cross-sectional view of a bottom mold structure of a device for manufacturing a tandem water-soluble sand core mold according to the present invention;
fig. 10 is a top view of a cover plate structure of a device for manufacturing a tandem water-soluble sand core mold according to the present invention;
FIG. 11 is a schematic cross-sectional view of a cover plate structure of a device for manufacturing a tandem water-soluble sand core mold according to the present invention;
fig. 12 is a schematic diagram of a mandrel shaft structure of a front end socket tool of a preparation device of a tandem water-soluble sand mandrel according to the invention;
FIG. 13 is a schematic diagram of a mandrel shaft structure of a column segment reinforcement tool of a preparation device for a tandem water-soluble sand mandrel according to the present invention;
fig. 14 is a schematic diagram of a mandrel shaft structure of a column segment component tool of a preparation device of a tandem water-soluble sand mandrel according to the present invention;
fig. 15 is a schematic diagram of the core structure of a column segment component of a device for preparing a tandem water-soluble sand core mold according to the present invention;
FIG. 16 is a schematic view of a column segment component panel of a device for making a tandem water-soluble sand core mold according to the present invention;
fig. 17 is a schematic diagram of a mandrel shaft structure of a tandem water-soluble sand mandrel preparation device according to the present invention.
Wherein, the device comprises a front end enclosure 1, a column section part 2, a column section part 3, a column section part 4, a column section reinforcement part 5, a column section part 6, a column section part 7, a back end enclosure 8, a core mold 9, a back end enclosure bottom mold 10, a back end enclosure tooling core mold shaft 11, a bottom nut 12, a back end enclosure inner core 13, an inner fastening bolt 14, an upper nut 15, an outer straight-mouth compression ring 15, a back end enclosure cover plate 16, an outer fastening bolt 17, a front end enclosure tooling core mold shaft 18, a front end enclosure inner core 19, an inner straight-mouth compression ring 20, a front end enclosure bottom mold 21, a front end enclosure cover plate 22, a column section reinforcement tooling core mold shaft 23, a column section reinforcement bottom mold 24, a column section reinforcement panel 25, 26-column section reinforcement cover plates, 27-column section reinforcement inner fastening bolts, 28-column section component tooling mandrel shafts, 29-column section component bottom molds, 30-column section component inner cores, 31-column section component panel plates, 32-column section component cover plates, 33-back end enclosure bottom fastening threads, 34-back end enclosure positioning shafts, 35-back end enclosure inner core positioning platforms, 36-back end enclosure upper fastening threads, 37-back end enclosure bottom mold positioning holes, 38-back end enclosure straight opening compression ring positioning platforms, 39-back end enclosure cover plate positioning platforms, 40-back end enclosure outer fastening threaded holes, 41-back end enclosure inner core fastening threaded holes, 42-back end enclosure cover plate inner fastening through holes, 43-back end enclosure cover plate outer fastening through holes, 44-back end enclosure cover plate positioning surfaces, 45-front end socket positioning shafts, 46-front end socket inner core positioning platforms, 47-front end socket bottom die positioning surfaces, 48-column section reinforcement panel positioning platforms, 49-column section reinforcement bottom die positioning surfaces, 50-column section component bottom die positioning surfaces, 51-column section component inner cores and panel positioning grooves, 52-column section component panel positioning platforms, 53-front long round positioning column sections, 54-rear long round positioning column sections, 55-rear end connecting threads and 56-front end connecting threads.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, in the case of no conflict, embodiments of the present invention and features of the embodiments may be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.
1. The first embodiment is described with reference to fig. 1-17, and the serial water-soluble sand core mold comprises a front end enclosure 1, a rear end enclosure 7, N column section components, a column section reinforcing member 4 and a core mold shaft 8, wherein the front end enclosure 1, the N column section components, the N column section reinforcing members and the rear end enclosure 7 ensure the coaxiality of front and rear polar holes and the core mold through the core mold shaft 8, and are formed into a column-shaped gas cylinder core mold with end enclosures at two ends which are connected in series after being bonded in a butt joint mode.
The front end and the rear end of the mandrel shaft 8 are in a long round structure form (a front long round positioning column section 53 and a rear long round positioning column section 54) with flat surfaces, and the middle section is a cylinder.
The central hole of the column segment reinforcement 4 is matched with the cylindrical surface of the core mold shaft 8, the oblong holes of the front seal head 1 and the rear seal head 7 are matched with the oblong segments at the two ends of the core mold shaft 8, and coaxiality of the whole column-shaped gas cylinder core mold with the seal head is realized. The long round holes of the front sealing head 1 and the rear sealing head 7 are matched with long round sections at two ends of the mandrel shaft 8, so that coaxiality of the whole cylindrical gas cylinder mandrel with the sealing head is realized, and in the fiber winding forming process, when the X shaft rotates, rotation and sliding do not occur between the sand mandrel and the mandrel shaft 8.
The invention relates to a serial water-soluble sand core mould, which belongs to the field of design and manufacture of fiber composite material core moulds and comprises a front sealing head 1, a rear sealing head 7, N column section parts, N column section reinforcing parts and a core mould shaft 8. The front end socket 1 is manufactured by a front end socket forming tool; the rear seal head 7 is manufactured by a rear seal head forming tool; the column section component is manufactured by a column section tool and is used by N series connection combinations according to the product size; the column section reinforcing piece 4 is manufactured by a column section reinforcing piece tool, is selected to be used when needed according to the size and stress conditions of the gas cylinder, and is installed at a weak stress position in a combined mode.
The components are prepared by mixing and bonding water-soluble adhesive polyvinyl alcohol and 80-mesh river sand according to the proportion of 7:1 in the preparation process, the molding process is simple, the strength of each sand core component after curing is high, the modulus is high, the high temperature resistance is realized, the water-soluble removal can be realized, the demolding is simple, and the operation is easy.
The preparation method of the tandem type water-soluble sand core mould specifically comprises the following steps:
(1) Preparing a front end enclosure 1, wherein the front end enclosure 1 is manufactured by a front end enclosure forming tool, a front end enclosure bottom 21 and a front end enclosure core mold shaft 18 are fixed by nuts, and then are filled with polyvinyl alcohol river sand which is uniformly mixed in proportion, and are compacted; the profile and thickness of the core mold are ensured by a mold cavity between the front end cover inner core 19 and the front end cover bottom mold 21, the front end cover inner core 19 is seated on a matching step of the front end cover core mold shaft 18, and an inner straight opening of the front end 1 is prepared by an inner straight opening compression ring 20 and a front end cover plate 22; the front end socket cover plate 22 is respectively connected and fixed with the front end socket inner core 19, the inner straight-mouth compression ring 20 and the front end socket bottom die 21 through hexagon bolts.
The specific method comprises the following steps: the bottom fastening thread of the front end socket tooling mandrel shaft 18 penetrates into the positioning hole of the front end socket bottom die 21, and after the bottom fastening thread is positioned through the bottom die positioning surface 47 of the front end socket positioning shaft 45 and the bottom die, the bottom nut 11 is screwed. Uniformly mixing the 80-mother river sand and the polyvinyl alcohol according to the ratio of 7:1, filling the polyvinyl alcohol river sand uniformly mixed according to the ratio into the front end socket bottom die 21, compacting, and filling the mixture into the position of the front end socket inner core positioning table 46. The front end socket inner core 19 is hoisted and placed on the front end socket inner core positioning table 46 through the hoisting ring by screwing the hoisting ring into the fastening threaded hole of the front end socket inner core 19, and the upper nut 14 is screwed into the upper end fastening threaded position of the front end socket core mold shaft 18 to fix the front end socket inner core 19. Continuously filling polyvinyl alcohol river sand, compacting, and filling the mixture to the position of the straight opening of the inner core of the front seal head. And (3) installing a straight-mouth compression ring 20 in the front end socket, continuously filling polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the upper end surface of the compression ring 20. The hanging ring of the front end enclosure inner core 19 is unscrewed, the front end enclosure cover plate 22 is installed, the inner fastening bolt 13 and the outer fastening bolt 17 are screwed in, and the front end enclosure cover plate 22 is matched and fixedly connected with the positioning tables of the front end enclosure inner core 19, the inner straight-mouth compression ring 20 and the bottom die 21 respectively. After the solidification is finished, the inner fastening bolt 13 and the outer fastening bolt 17 are removed, the front end cover plate 22 is taken down, the upper nut 14 is removed, the front end inner core 19 is screwed with the hanging ring, and the inner straight-mouth compression ring 20 and the front end inner core 19 are removed. And removing the bottom nut 11, removing the mandrel shaft 18, taking out the sand core part of the front end socket, and processing the surface to be smooth and flat to finish the forming and manufacturing of the front end socket 1.
(2) Preparing a rear end enclosure 7, wherein the rear end enclosure 7 is manufactured by a rear end enclosure forming tool, fixing a rear end enclosure bottom die 9 and a rear end enclosure core die shaft 10 through nuts, filling polyvinyl alcohol river sand uniformly mixed in proportion, and compacting; the profile and thickness of the core mold are ensured by a mold cavity between the back end enclosure core mold 12 and the back end enclosure bottom mold 9, the back end enclosure core mold 12 is seated on a matching step of the front end enclosure core mold shaft 10, and an outer straight opening of the back end enclosure 7 is prepared by an outer straight opening compression ring 15 and a back end enclosure cover plate 16. The rear end socket cover plate 16 is respectively connected and fixed with the rear end socket inner core 12, the outer straight-port compression ring 15 and the rear end socket bottom die 9 through hexagon bolts.
The specific method comprises the following steps: the bottom fastening thread 33 of the back end socket tooling mandrel shaft 10 penetrates into the positioning hole 37 of the back end socket bottom die 9, and after being positioned by the bottom surface of the back end socket positioning shaft 34 and the bottom die, the bottom nut 11 is screwed. Uniformly mixing the 80-mother river sand and the polyvinyl alcohol according to the ratio of 7:1, filling the polyvinyl alcohol river sand uniformly mixed according to the ratio into the bottom die 9 of the rear end socket, compacting, and filling the mixture into the position of the inner core positioning table 35 of the rear end socket. The hoisting ring is screwed into the fastening threaded hole 41 of the back end enclosure inner core 12, the back end enclosure inner core 12 is hoisted and placed on the back end enclosure inner core positioning table 35 through the hoisting ring, the upper nut 14 is screwed into the fastening threaded hole 36 at the upper end of the core mold shaft 10, and the back end enclosure inner core 12 is fixed. And continuously filling the polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the position of the back end socket straight-mouth compression ring positioning table 38. And (5) installing the outer straight-opening compression ring 15 of the end socket, continuously filling polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the upper end face of the compression ring 15. The hanging ring of the front end enclosure inner core 12 is unscrewed, the rear end enclosure cover plate 16 is installed, the inner fastening bolt 13 is screwed in to connect the rear end enclosure inner core fastening threaded hole 41 and the rear end enclosure cover plate outer fastening through hole 43, the outer fastening bolt 17 is screwed in to connect the rear end enclosure outer core fastening threaded hole 40 and the rear end enclosure cover plate outer fastening through hole 42, and the positioning surface 44 of the cover plate 16 is matched and fixedly connected with the rear end enclosure inner core 12, the outer straight-mouth compression ring 15 and the positioning table 39 of the rear end enclosure bottom die 9 respectively. After the solidification is finished, the inner fastening bolt 13 and the outer fastening bolt 17 are removed, the cover plate 16 and the outer straight-mouth compression ring 15 are taken down, the upper nut 14 is removed, the hanging ring is screwed on the back head inner core 9, and the back head inner core 12 is removed. And removing the bottom nut 11, taking down the mandrel shaft 10, taking out the rear end socket sand core component, and processing the surface to be smooth and flat to finish the forming and manufacturing of the rear end socket 7.
(3) Preparing a column segment reinforcing piece 4, wherein the column segment reinforcing piece 4 is manufactured by a column segment reinforcing piece tool, fixing a column segment reinforcing piece bottom die 24 and a column segment reinforcing piece core die shaft 23 through nuts, filling polyvinyl alcohol river sand uniformly mixed in proportion, and compacting; the thickness of the column segment reinforcement 4, the inner straight mouth is ensured by the mold cavity between the column segment reinforcement panel 25, the column segment reinforcement cover plate 26 and the column segment reinforcement bottom mold 24, and the outer straight mouth is ensured by the mold surface of the column segment reinforcement bottom mold 24; the column section reinforcement cover plate 26 is respectively connected and fixed with the column section reinforcement panel 25 and the column section reinforcement bottom die 24 through hexagon bolts. The column segment reinforcing piece 4 can be used according to the size and stress condition of the gas cylinder and is installed at the weak stress position in a combined mode when needed.
The specific method comprises the following steps: the bottom fastening thread of the column segment reinforcing member tooling mandrel shaft 23 penetrates into the positioning hole of the column segment reinforcing member bottom die 24, and after being positioned by the column segment reinforcing member bottom die positioning surface 49 and the column segment reinforcing member bottom die 24, the bottom nut 11 is screwed. Uniformly mixing the 80-mother river sand and the polyvinyl alcohol according to the ratio of 7:1, filling the polyvinyl alcohol river sand uniformly mixed according to the ratio into the column segment reinforcement bottom die 24, compacting, and filling the column segment reinforcement inner core positioning table 48. The hoisting ring is screwed into the fastening screw hole of the column segment reinforcement panel 25, the column segment reinforcement panel 25 is hoisted and placed on the positioning table 48 through the hoisting ring, the upper nut 14 is screwed into the upper fastening screw hole of the column segment reinforcement mandrel shaft 23, and the column segment reinforcement panel 25 is fixed. And continuously filling the polyvinyl alcohol river sand, compacting, and filling the river sand to the upper end face of the column section reinforcement panel 25. The hanging ring of the column section reinforcement panel 25 is unscrewed, the column section reinforcement cover plate 26 is installed, the inner fastening bolts 27 and the outer fastening bolts 17 are screwed in, and the cover plate 27 is matched and fixedly connected with the positioning tables of the column section reinforcement panel 25 and the column section reinforcement bottom die 24 respectively. After curing is completed, the inner and outer fastening bolts 27, 17 are removed, the column section stiffener cover 26 is removed, the upper nut 14 is removed, the lifting ring is screwed into the column section stiffener panel 25, and the column section stiffener panel 25 is removed. And (3) removing the bottom nut 11, taking down the core mold shaft 23 of the column segment reinforcing member, taking out the column segment reinforcing sand core part, and processing the surface to be smooth and flat to finish the molding and manufacturing of the column segment reinforcing member 4. Repeating the operation to finish the forming and manufacturing of the required number of column segment reinforcements 4.
Preparing a column section part, wherein the column section part is manufactured by a column section part tool, after a column section part bottom die 29 and a column section part core die shaft 28 are fixed through nuts, polyvinyl alcohol river sand uniformly mixed in proportion is filled in, the column section part is compacted, the thickness and the inner straight opening of the column section part are ensured by a column section part panel 31, a column section part cover plate 32 and a die cavity between the column section part bottom die 29, the outer straight opening is ensured by a column section part bottom die 29 molded surface, and the cover plate is respectively connected and fixed with the panel and the bottom die through hexagon bolts. The number of column section components is used in N series combinations depending on the size of the product. Each component of the column section is provided with a mounting and positioning straight opening, and the column section is bonded and fixed for use after butt joint.
The preparation method comprises the following steps: the bottom fastening thread of the column part tooling mandrel shaft 28 penetrates into the positioning hole of the column part bottom die 29, and after being positioned by the column part bottom die positioning surface 50 and the column part bottom die 29, the bottom nut 11 is screwed. The column section component inner core 30 is placed, the column section component inner core 30 is positioned through a central hole and the column section component mandrel shaft 28, a hanging ring is screwed into a fastening threaded hole of the column section component panel 31, the column section component panel 31 is hung and placed on the inner core 30 through the hanging ring, the column section component panel positioning table 52 and the column section component inner core are matched and positioned with the panel positioning groove 51, an upper nut 14 is screwed into a fastening threaded hole at the upper end of the column section component mandrel shaft 28, and the column section component positioning panel 31 is fixed. Uniformly mixing the 80-mother river sand and the polyvinyl alcohol according to the ratio of 7:1, filling the uniformly mixed polyvinyl alcohol river sand in a mold cavity formed by the column section component bottom mold 29, the column section component inner core 30 and the column section component panel 31, compacting, and filling the mixture in the upper end face of the column section component panel 31. The hanging ring of the column section part panel 31 is unscrewed, the column section part cover plate 32 is installed, the inner fastening bolt 27 and the outer fastening bolt 17 are screwed in, and the column section part cover plate 32 is matched and fixedly connected with the positioning tables of the column section part panel 31 and the column section part bottom die 32 respectively. After the solidification is finished, the inner fastening bolt 27 and the outer fastening bolt 17 are removed, the column section part cover plate 32 is taken down, the upper nut 14 is removed, the hanging ring is screwed in the column section part panel 31, the column section part panel 31 is removed, the column section part inner core 30 is taken out, the bottom nut 11 is removed, the column section part core mold shaft 28 is taken out, the column section sand core part is taken out, the surface is processed to be smooth and flat, and the forming and manufacturing of the column section part 2 are completed. Repeating the operation to finish the forming and manufacturing of the required number of column section parts 3, 5 and 6.
(5) The front sealing head 1, N column section components and the rear sealing head 7 are sequentially connected in series, a mandrel shaft 8 is penetrated in the middle of the front sealing head, the front pole hole, the rear pole hole and the mandrel are guaranteed to be coaxial through the mandrel shaft 8, and the column section reinforcing piece 4 is installed at a stress weak position of the column section components in series in a combined mode according to the size and stress conditions of the gas cylinder.
And the column section reinforcing piece 4 and the column section parts 2, 3, 5 and 6 are in butt joint and matched with each other through straight openings according to a designed combination mode, the bonding at the positions of the straight openings is carried out by using a polyvinyl alcohol adhesive, and the bonding surface is processed to be smooth and flat after solidification, so that the production of the column section assembly is completed.
The specific method comprises the following steps: the mandrel shaft 8 penetrates into the center of the column section assembly, the rear sealing head 7 is installed, the circumferential positioning of the rear sealing head 7 is realized through the matching of a bottom long round through hole and a long round positioning column section 54 of the mandrel shaft 8, and the axial positioning of the mandrel shaft 8 is realized through a cylindrical rear end positioning surface of the mandrel shaft. The front seal head 1 is installed, the circumferential positioning of the front seal head 1 is realized by matching a long round through hole at the bottom with a long round positioning column section 53 of the mandrel shaft 8, and the axial positioning of the mandrel shaft 8 is realized by a positioning surface at the front end of a cylinder of the mandrel shaft. Is connected with the rear connecting shaft of the winding machine through the rear joint screw thread 55 and is connected with the front connecting shaft of the winding machine through the front joint screw thread 56. The matched positioning of the oblong holes can avoid the influence of the core mold on the line type and the product quality caused by the autorotation of the core mold in the X-axis rotation process during the winding and forming of the continuous fibers. And (3) bonding the straight opening of the front seal head, the straight opening of the column section assembly and the straight opening of the rear seal head by using a polyvinyl alcohol adhesive, and curing and then treating the bonding surface until the bonding surface is smooth and flat to finish the manufacturing of the serial water-soluble sand core mould.
The embodiments of the invention disclosed above are intended only to help illustrate the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (9)
1. A preparation method of a tandem type water-soluble sand core mold is characterized by comprising the following steps of: the method specifically comprises the following steps:
(1) Preparing a front end socket (1), wherein the front end socket (1) is manufactured by a front end socket forming tool, a front end socket bottom die (21) and a front end socket core die shaft (18) are fixed through nuts, and then uniformly mixed polyvinyl alcohol river sand in proportion is filled in and compacted; the molded surface and the thickness of the core mold are ensured by a mold cavity between a front end enclosure inner core (19) and a front end enclosure bottom mold (21), the front end enclosure inner core (19) is seated on a matching step of a front end enclosure core mold shaft (18), and an inner straight opening of the front end enclosure (1) is prepared by an inner straight opening compression ring (20) and a front end enclosure cover plate (22);
(2) Preparing a rear end enclosure (7), wherein the rear end enclosure (7) is manufactured by a rear end enclosure forming tool, a rear end enclosure bottom die (9) and a rear end enclosure tool core die shaft (10) are fixed through nuts, and then uniformly mixed polyvinyl alcohol river sand in proportion is filled and compacted; the molded surface and the thickness of the core mold are ensured by a mold cavity between the back end enclosure inner core (12) and the back end enclosure bottom mold (9), the back end enclosure inner core (12) is seated on a matching step of a back end enclosure tool core mold shaft (10), and an outer straight opening of the back end enclosure (7) is prepared by an outer straight opening compression ring (15) and a back end enclosure cover plate (16);
(3) Preparing a column segment reinforcing piece (4), wherein the column segment reinforcing piece (4) is manufactured by a column segment reinforcing piece tool, a column segment reinforcing piece bottom die (24) and a column segment reinforcing piece tool core die shaft (23) are fixed through nuts, and then uniformly mixed polyvinyl alcohol river sand in proportion is filled and compacted; the thickness of the column section reinforcement (4) and the inner straight opening are ensured by a column section reinforcement panel (25), a column section reinforcement cover plate (26) and a column section reinforcement bottom die (24), and the outer straight opening is ensured by a column section reinforcement bottom die (24) profile;
(4) Preparing a column section part, wherein the column section part is manufactured by a column section part tool, a column section part bottom die (29) and a column section part tool mandrel (28) are fixed through nuts, polyvinyl alcohol river sand uniformly mixed in proportion is filled in the column section part, the column section part is compacted, the thickness and the inner straight opening of the column section part are ensured by a die cavity between a column section part panel (31), a column section part cover plate (32) and the column section part bottom die (29), and the outer straight opening is ensured by a column section part bottom die (29) profile;
(5) The front seal head (1), N column section components and the rear seal head (7) are sequentially connected in series, a mandrel shaft (8) penetrates through the middle of the front seal head, a front pole hole, a rear pole hole and a mandrel are guaranteed to be coaxial through the mandrel shaft (8), and the column section reinforcing piece (4) is assembled and installed at a stress weak position of the column section components in series according to the size and stress condition of a gas cylinder;
the tandem type water-soluble sand core mould comprises a front end socket (1), a rear end socket (7), N column section components, N column section reinforcing pieces (4) and a core mould shaft (8), wherein the front end socket (1), the N column section components, the N column section reinforcing pieces (4) and the rear end socket (7) ensure the coaxiality of a front pole hole and a rear pole hole and a core mould through the core mould shaft (8), and the front end socket, the rear end socket and the core mould are spliced into a cylindrical gas cylinder core mould with end sockets at two ends which are connected in series.
2. A method of making a tandem water soluble sand core mold according to claim 1, wherein: the specific method of the step (1) comprises the following steps: the bottom fastening thread of the front end socket core mold shaft (18) penetrates into a positioning hole of the front end socket bottom mold (21), after the front end socket core mold shaft (45) is positioned by a bottom mold positioning surface (47) and the front end socket bottom mold (21), a bottom nut (11) is screwed down, river sand and polyvinyl alcohol are uniformly mixed according to the proportion of 7:1, the front end socket bottom mold (21) is filled with the uniformly mixed polyvinyl alcohol river sand in proportion, the mixture is compacted and filled to the position of a front end socket core mold positioning table (46), a lifting ring is screwed into a fastening threaded hole of the front end socket core mold (19), the front end socket core mold (19) is lifted and placed on the front end socket core mold positioning table (46) through the lifting ring, an upper nut (14) is screwed into the upper end fastening thread of the front end socket core mold shaft (18), and the front end socket core mold (19) is fixed; continuously filling polyvinyl alcohol river sand, compacting, and filling the mixture to the position of the straight opening of the inner core of the front seal head; installing a front end socket inner straight-mouth compression ring (20), continuously filling polyvinyl alcohol river sand, compacting, filling the polyvinyl alcohol river sand into the upper end surface of the inner straight-mouth compression ring (20), screwing down a hanging ring of a front end socket inner core (19), installing a front end socket cover plate (22), screwing in an inner fastening bolt (13) and an outer fastening bolt (17), and respectively matching and fixedly connecting the front end socket cover plate (22) with positioning tables of the front end socket inner core (19), the inner straight-mouth compression ring (20) and a front end socket bottom die (21); after solidification, removing the inner fastening bolt (13) and the outer fastening bolt (17), removing the front end socket cover plate (22), removing the upper nut (14), screwing the hanging ring into the front end socket inner core (19), and removing the inner straight-port compression ring (20) and the front end socket inner core (19); and removing the bottom nut (11), taking down the front end socket core mold shaft (18), taking out the front end socket sand core component, and processing the surface to be smooth and flat to finish the forming and manufacturing of the front end socket (1).
3. A method of making a tandem water soluble sand core mold according to claim 1, wherein: the specific method of the step (2) is as follows: the back end socket bottom fastening screw thread (33) of the back end socket tooling mandrel shaft (10) penetrates into a back end socket bottom die positioning hole (37) of the back end socket bottom die (9), and after the bottom surface of the back end socket positioning shaft (34) and the bottom die are positioned, the bottom nut (11) is screwed; uniformly mixing river sand and polyvinyl alcohol according to the proportion of 7:1, filling the polyvinyl alcohol river sand uniformly mixed according to the proportion into a bottom die (9) of the rear end socket, compacting, and filling the mixture into the position of an inner core positioning table (35) of the rear end socket; a lifting ring is screwed into a fastening threaded hole (41) of the back end socket inner core (12), the back end socket inner core (12) is lifted and placed on a back end socket inner core positioning table (35) through the lifting ring, an upper nut (14) is screwed into a back end socket upper fastening thread (36) of a back end socket tooling mandrel shaft (10), and the back end socket inner core (12) is fixed; continuously filling polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the position of a rear seal head straight-mouth compression ring positioning table (38); installing a rear seal head outer straight-mouth compression ring (15), continuously filling polyvinyl alcohol river sand, compacting, and filling the polyvinyl alcohol river sand to the upper end face of the outer straight-mouth compression ring (15); the lifting ring of the back end enclosure inner core (12) is unscrewed, a back end enclosure cover plate (16) is installed, an inner fastening bolt (13) is screwed in to connect a back end enclosure inner core fastening threaded hole (41) and a back end enclosure cover plate inner fastening through hole (42), an outer fastening bolt (17) is screwed in to connect a back end enclosure outer core fastening threaded hole (40) and a back end enclosure cover plate outer fastening through hole (43), and a locating surface back end enclosure cover plate locating surface (44) of the back end enclosure cover plate (16) is respectively matched and fixedly connected with a back end enclosure inner core (12), an outer straight mouth compression ring (15) and a back end enclosure cover plate locating table (39) of the back end enclosure bottom die (9); after solidification, removing the inner fastening bolt (13) and the outer fastening bolt (17), removing the back end socket cover plate (16) and the outer straight-mouth compression ring (15), removing the upper nut (14), screwing the lifting ring into the back end socket inner core (12), and removing the back end socket inner core (12); and removing the bottom nut (11), taking down the mandrel shaft (10) of the back end socket tool, taking out the sand core part of the back end socket, and processing the surface until the sand core part is smooth and flat, thereby completing the molding and manufacturing of the back end socket (7).
4. A method of making a tandem water soluble sand core mold according to claim 1, wherein: the specific method of the step (3) is as follows: the bottom fastening thread of the column segment reinforcing part tooling mandrel shaft (23) penetrates into a positioning hole of the column segment reinforcing part bottom die (24), and after being positioned by the column segment reinforcing part bottom die positioning surface (49) and the column segment reinforcing part bottom die (24), the bottom nut (11) is screwed; uniformly mixing river sand and polyvinyl alcohol according to the proportion of 7:1, filling the polyvinyl alcohol river sand uniformly mixed according to the proportion into a column segment reinforcement bottom die (24), compacting, and filling the mixture into the position of a column segment reinforcement panel positioning table (48) of a column segment reinforcement inner core; a hanging ring is screwed into a fastening threaded hole of the column section reinforcement panel (25), the column section reinforcement panel (25) is hung and placed on a column section reinforcement panel positioning table (48) through the hanging ring, an upper nut (14) is screwed into a fastening threaded hole at the upper end of a column section reinforcement tooling mandrel shaft (23), and the column section reinforcement panel (25) is fixed; continuously filling polyvinyl alcohol river sand, compacting, and filling the river sand to the upper end face of the column section reinforcement panel (25); the lifting ring on the column section reinforcement panel (25) is unscrewed, the column section reinforcement cover plate (26) is installed, the column section reinforcement inner fastening bolt (27) and the column section reinforcement outer fastening bolt (17) are screwed in, and the column section reinforcement cover plate (26) is matched and fixedly connected with the positioning tables on the column section reinforcement panel (25) and the column section reinforcement bottom die (24) respectively; after the solidification is finished, the inner fastening bolt (27) and the outer fastening bolt (17) are removed, the column section reinforcement cover plate (26) is taken down, the upper nut (14) is removed, the column section reinforcement panel (25) is screwed into the hanging ring, and the column section reinforcement panel (25) is removed; removing the bottom nut (11), taking down the column segment reinforcing member tooling mandrel shaft (23), taking out the column segment reinforcing sand core part, and processing the surface to be smooth and flat to finish the molding and manufacturing of the column segment reinforcing member (4); repeating the operation to finish the molding and manufacturing of the required number of column segment reinforcements (4).
5. A method of making a tandem water soluble sand core mold according to claim 1, wherein: the specific method of the step (4) is as follows: the bottom fastening thread of the column section component tooling mandrel shaft (28) penetrates into a positioning hole of a column section component bottom die (29), and after being positioned by the column section component bottom die positioning surface (50) and the column section component bottom die (29), the bottom nut (11) is screwed; placing a column section component inner core (30), positioning through a central hole and a column section component tooling mandrel shaft (28), screwing a lifting ring into a fastening threaded hole of a column section component panel (31), lifting and placing the column section component panel (31) onto the column section component inner core (30) through the lifting ring, positioning a column section component panel positioning table (52) and the column section component inner core in a matched manner with a panel positioning groove (51), screwing an upper nut (14) into the fastening threaded hole at the upper end of the column section component tooling mandrel shaft (28), and fixing the column section component panel (31); uniformly mixing river sand and polyvinyl alcohol according to the proportion of 7:1, filling the uniformly mixed polyvinyl alcohol river sand in a die cavity formed by a column section part bottom die (29), a column section part inner core (30) and a column section part panel (31), compacting, and filling the mixture into the upper end face of the column section part panel (31); the lifting ring of the column section part panel (31) is unscrewed, the column section part cover plate (32) is installed, the column section reinforcing piece inner fastening bolt (27) and the outer fastening bolt (17) are screwed in, and the column section part cover plate (32) is matched and fixedly connected with the positioning tables of the column section part panel (31) and the column section part bottom die (29) respectively; removing the inner fastening bolt (27) and the outer fastening bolt (17) of the column section reinforcing piece after solidification is completed, taking down the column section component cover plate (32), removing the upper nut (14), screwing in the hanging ring on the column section component panel (31), removing the column section component panel (31), taking out the column section component inner core (30), removing the bottom nut (11), removing the column section component tooling mandrel shaft (28), taking out the column section sand core component, and finishing the forming and manufacturing of the column section component after the surface is processed to be smooth and flat; repeating the operation to finish the molding and manufacturing of the column section parts with the required number.
6. A method of making a tandem water soluble sand core mold according to claim 1, wherein: the specific method of the step (5) is as follows: penetrating a core mold shaft (8) into the center of the column section assembly, installing a rear sealing head (7), realizing circumferential positioning of the rear sealing head (7) through matching of a bottom long round through hole and a rear long round positioning column section (54) of the core mold shaft (8), and realizing axial positioning of the core mold shaft (8) through a cylindrical rear end positioning surface of the core mold shaft (8); the front seal head (1) is installed, the circumferential positioning of the front seal head (1) is realized by matching a bottom long round through hole with a front long round positioning column section (53) of the core mold shaft (8), and the axial positioning of the core mold shaft (8) is realized by a cylindrical front end positioning surface of the core mold shaft; and (3) bonding the straight opening of the front seal head, the straight opening of the column section assembly and the straight opening of the rear seal head by using a polyvinyl alcohol adhesive, and curing and then treating the bonding surface until the bonding surface is smooth and flat to finish the manufacturing of the serial water-soluble sand core mould.
7. A method of making a tandem water soluble sand core mold according to claim 1, wherein: the front end and the rear end of the mandrel shaft (8) are in a long round structure form with flat surfaces, and the middle section is a cylinder.
8. A method of making a tandem water soluble sand core mold according to claim 1 or 7, wherein: the central hole of the column section reinforcement (4) is matched with the cylindrical surface of the core mold shaft (8), the oblong holes of the front end socket (1) and the rear end socket (7) are matched with the oblong sections at the two ends of the core mold shaft (8), and coaxiality of the whole column-shaped gas cylinder core mold with the end socket is achieved.
9. A method of making a tandem water soluble sand core mold according to claim 8, wherein: each component is made by bonding water-soluble adhesive polyvinyl alcohol.
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| US7650926B2 (en) * | 2006-09-28 | 2010-01-26 | United Technologies Corporation | Blade outer air seals, cores, and manufacture methods |
| CN101456062A (en) * | 2008-12-24 | 2009-06-17 | 苏州明志科技有限公司 | Core group and core assembly process thereof |
| CN103317628A (en) * | 2013-02-01 | 2013-09-25 | 北京玻钢院复合材料有限公司 | Preparation methods for soluble core mould and nonmetal-lining or no-lining fibre winding container |
| CN104894350A (en) * | 2015-06-01 | 2015-09-09 | 马钢(集团)控股有限公司 | Waste heat water toughening method and device for multi-mold assemblage casted high manganese steel casting |
| CN113103480A (en) * | 2021-04-01 | 2021-07-13 | 西北工业大学 | Split type metal core die for winding large solid rocket engine shell |
| CN113926989B (en) * | 2021-10-14 | 2022-09-09 | 合肥工业大学 | Sand core mold structure, preparation method and optimization method |
| CN217512810U (en) * | 2022-04-29 | 2022-09-30 | 哈尔滨玻璃钢研究院有限公司 | Water-soluble sand mandrel of serial-type |
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Inventor after: Wu Weiping Inventor after: Chang Cheng Inventor after: Jia Xue Inventor after: Fei Chundong Inventor after: Wang Weili Inventor before: Wang Weili Inventor before: Wu Weiping |