CN112571822B - Memory non-metal core mold structure suitable for winding with medicine and shell forming method - Google Patents

Memory non-metal core mold structure suitable for winding with medicine and shell forming method Download PDF

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Publication number
CN112571822B
CN112571822B CN202011181755.8A CN202011181755A CN112571822B CN 112571822 B CN112571822 B CN 112571822B CN 202011181755 A CN202011181755 A CN 202011181755A CN 112571822 B CN112571822 B CN 112571822B
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core mold
winding
charge
fixing ring
core
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CN112571822A (en
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李德华
江真
林天一
王蓬勃
郑庆
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Shanghai Xinli Power Equipment Research Institute
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Shanghai Xinli Power Equipment Research Institute
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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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • 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
    • B29C33/76—Cores
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/40—Weight reduction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The invention discloses a memory non-metal core mold structure suitable for winding with a medicine and a shell forming method. The structure realizes the molding of the thermal insulation layer and the propellant molded surface through a conventional charging process, the charging core rod and the memory core mold are adopted as winding shafts, the strength and the rigidity of the integrated core mold with the pesticide winding are enhanced, the requirements on pesticide type design, charging and winding are met, the core mold structure can be taken out easily by controlling the process temperature, and the problems that the integrated core mold with the pesticide winding structure is too complex, the molding process is complex and the like are avoided.

Description

Memory non-metal core mold structure suitable for winding with medicine and shell forming method
Technical Field
The invention relates to a memory non-metal core mold structure suitable for winding with a medicine and a shell forming method, and belongs to the technical field of composite shells of solid rocket engines.
Background
The light weight and high energy are the development trend of a new generation of solid rocket engine, the composite shell is formed by adopting a non-metal material, the passive quality of the engine can be effectively reduced by applying a high-strength ratio fiber material, and the overall performance of the engine is improved.
The winding composite shell with the powder is used as one of the forming modes of the composite shell, and has the advantages of small and light metal structural parts, diversified charging modes, light overall structure, simple process forming and the like.
The conventional fiber winding composite shell is formed by adopting an ablation core mold or a split core mold, the process comprises the steps of core mold forming, shell forming and charging, and the process is relatively complex. For tactical missile, the missile body has smaller missile diameter, the shell has larger front and rear openings due to the complex combustion surface form of the propellant, so that the charging process is realized, and the development of the fiber efficiency of the composite shell is greatly influenced due to the existence of the large opening.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the memory nonmetal core mold structure suitable for winding with the explosive is provided, the molding requirement of the winding composite shell with the explosive is met, the molding process of the winding composite shell with the fiber is simplified, and the problems that the application of the conventional composite shell with small and medium-sized projectile diameters is less, the explosive loading performance is difficult to release and the like are solved.
The technical solution of the invention is as follows:
a memory non-metallic mandrel structure suitable for tape winding, comprising: the device comprises a front joint, a rear joint, a front fixing ring, a rear fixing ring, a charging core rod, a charge column, a heat insulating layer and an annular core mold;
the annular core mold is fixed on the charge core rod to form a charge core mold combined structure, the charge column is arranged in the heat insulating layer, a front joint and a rear joint are prefabricated at the front end and the rear end of the heat insulating layer, the charge core mold combined structure is attached to the charge profile, the two ends of the charge core rod are fixed with the rear fixing ring through the front fixing ring, the front joint and the rear joint are respectively connected with the front fixing ring and the rear fixing ring through thread structures, and the front fixing ring and the rear fixing ring are provided with limit structures to ensure axial restraint of the charge core rod; axial sealing structures are arranged between the front joint and the charging core rod and between the front fixing ring and the charging core rod.
Further, the annular core mold is made of shape memory polymer high polymer materials, a female mold is sleeved outside in advance, a core rod is filled inside the annular core mold, then the annular core mold is pressed, cooled and solidified into an annular shape through the height Wen Chuisu and is fixed on the core rod, and a polytetrafluoroethylene release agent is sprayed on the surface of the annular core mold; the high temperature refers to the process temperature which is required to be more than or equal to the glass transition temperature of the shape memory polymer high molecular material.
Further, the rear part of the powder mould surface of the powder column is a wing surface, the middle part is an inner hole surface, and the front part is an annular surface; the charge core mold combined structure is a propellant forming core mold, the propellant charge is annular at the front part, has a shape of a middle inner hole and is columnar at the rear part, and the charge core mold combined structure is formed by casting by adopting a mold.
Furthermore, the molded surfaces of the charge core rod and the annular core mold are matched and attached to the shape surface of the explosive, the large end of the charge core rod is a propellant pouring side, sleeve connecting interfaces are reserved at the two ends of the charge core rod and used for being connected with a winding machine, and the charge core rod and the annular core mold realize that the explosive is simultaneously used as a winding core shaft.
Further, the front fixing ring and the rear fixing ring are provided with axial fixing flanges and tool mounting openings; the core mold structure is installed on a winding machine through the sleeves and the composite material shell is prepared until the shell is wound.
Furthermore, the front connector and the rear connector are pre-embedded in the molding stage of the heat insulation layer, and the heat insulation layer is coated on the inner side and the outer side of the front connector and the rear connector by ethylene propylene diene monomer rubber materials; the outer surfaces of the front joint and the rear joint are consistent with the inner surface of the shell.
Further, the charging core rod is made of an aluminum alloy material, a polytetrafluoroethylene release agent is sprayed on the surface of the charging core rod, and the release taper is set, so that the charging core rod is guaranteed to be disassembled and assembled; the front joint and the rear joint are made of titanium alloy, aluminum alloy or aluminum magnesium alloy, and the front fixing ring and the rear fixing ring are made of copper alloy.
Furthermore, the curing and forming temperature of the propellant is lower than the glass transition temperature of the shape memory polymer high-molecular material. After the grain is formed, the temperature of the oven is continuously increased to be more than or equal to the glass transition temperature of the shape memory polymer high molecular material, the temperature is kept for a period of time until the annular core mold is softened to the initial shape, and then the temperature is reduced to the room temperature to take out the annular core mold and charge the core mold to complete demolding.
Furthermore, the explosive column adopts propellant with the elastic modulus more than or equal to 15Mpa, and is poured into the inner cavity of the heat insulation layer, and the explosive profile surface is ensured by the explosive-filled core rod and the annular core mold.
Further, the invention also provides a shell forming method based on the memory non-metal core mold structure suitable for winding with the medicine, which comprises the following steps:
(1) The core mold structure after charging is sent to an oven for curing, and after the curing of the explosive columns is finished, the outer mold is removed, so that a winding core mold containing the explosive columns, the front and rear connectors and the heat insulation layer is obtained;
(2) The front fixing ring, the rear fixing ring and the sleeve are connected with the front end and the rear end of the winding core mold through threads to obtain a complete winding core mold;
(3) Installing a winding core mould on a winding machine tool, setting a layer spreading angle and winding tension parameters and operating a program to complete the winding forming of the composite shell;
(4) And after winding, conveying the structural part to an oven for precuring for 2 hours at 90 ℃, and then curing for 12 hours at 2MPa and 70 ℃ to realize the curing and molding of the composite material shell.
Compared with the prior art, the invention has the beneficial effects that:
(1) The nonmetal memory core mold and the metal core mold are used in combination, and simultaneously, the requirements of high rigidity and strength, complex medicine shape design and shell winding capacity are met.
(2) The non-metal memory core mould is adopted, so that the demoulding difficulty of the charge core mould is effectively reduced, stress concentration is eliminated, and the starting work risk is reduced.
(3) The invention adopts the shape memory polymer high molecular material annular core mould to match with the female mould and the charge core mould to be repeatedly used, thereby saving the production cost and improving the production efficiency.
(4) The method adopts a high-strength aluminum alloy material to prepare the charge core rod, assembles the shape memory polymer high polymer material at the clamping groove of the charge core rod, simultaneously assembles a female die at the outer side, and then is pressurized, cooled and solidified into a required shape through the high Wen Chuisu and fixed on the charge core rod to form a winding core die combined structure.
(5) The integrated core mold with the medicine winding comprises an engine propellant, is used for replacing the traditional ablation type or split type core mold, realizes the forming and winding bearing of the medicine surface by adopting the medicine charging core rod, simplifies the forming process of the composite shell, and realizes the winding forming of the composite shell with the medicine.
Drawings
FIG. 1 is a schematic view of an integrated core mold structure with medicine winding
FIG. 2 is a schematic view of a charge core rod structure and a non-metal memory annular core mold structure
Wherein, 1-front joint, 2-rear joint, 3-front fixing ring, 4-rear fixing ring, 5-core-filling rod, 6-grain, 7-heat-insulating layer, 8-nonmetal memory ring core mould
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention provides a non-metal memory core mold structure suitable for winding with a propellant, which is characterized in that a propellant core mold structure is formed by a propellant core mold made of high-strength aluminum alloy and an annular core mold made of shape memory polymer high polymer material, the core mold structure can be used as a propellant forming core mold, the propellant type is annular, a wing column and an inner hole, the propellant type is formed by casting a mold, front and rear connectors are pre-embedded in a heat insulating layer forming stage, the propellant core mold and the annular core mold realize the type, and the core mold can be used as a winding core mold after the propellant is charged. The core mould structure has the characteristics that the core mould structure has complex medicine shape forming and shell winding capacities simultaneously, the integral structure of the medicine-carrying winding core mould is simplified under the condition of meeting the medicine shape requirement, the integral bearing capacity of the medicine column core mould is improved, the winding forming of the compound shell with the medicine state is realized, and the core mould structure has the advantages of convenience in demoulding, capability of recycling the core mould and the like.
As shown in fig. 1 and 2, the memory non-metal core mold structure is characterized by comprising: the device comprises a front connector 1, a rear connector 2, a front fixing ring 3, a rear fixing ring 4, a charging core rod 5, a charge column 6, a heat insulation layer 7, an annular core mold 8 and a sleeve 9;
the annular core mold 8 is fixed on the charge core rod 5 to form a charge core mold combined structure, the charge column 6 is arranged inside the heat insulating layer 7, the front end and the rear end of the heat insulating layer 7 are prefabricated with a front joint 1 and a rear joint 2, the charge core mold combined structure is attached to the charge profile, the two ends of the charge core rod 5 are fixed with a rear fixing ring 4 through a front fixing ring 3, the front joint 1 and the rear joint 2 are respectively connected with the front fixing ring 3 and the rear fixing ring 4 through thread structures, and the front fixing ring 3 and the rear fixing ring 4 are provided with limit structures to ensure that the charge core rod 5 is axially constrained; axial sealing structures are arranged between the front joint 1 and the charging core rod 5 and between the front fixing ring 3 and the charging core rod 5; the sleeve 9 is connected with the charging core rod through a thread structure.
The charge core rod 5 is made of high-strength aluminum alloy materials, the overall rigidity and strength of the charge core rod are high, the charge core rod is light and high in bearing capacity, a polytetrafluoroethylene release agent is sprayed on the surface of the charge core rod, and the release taper is arranged, so that the release difficulty is reduced, and the charge core rod 5 is convenient to disassemble and assemble.
The rear part of the powder molding surface of the powder column is a wing surface, the middle part is an inner hole surface, and the front part is an annular surface, so that the requirements of various combustion powers are met; the combined structure of the charge core mold is a propellant forming core mold, the propellant charge shape is annular at the front part, has a shape of a hole in the middle part and is columnar at the rear part, and the charge core mold is molded by casting by adopting a mold, so that the preparation of the charge column is simple and efficient.
The charge core rod 5 and the annular core mold 8 are attached to the medicine profile, the big end is a propellant pouring side, the two ends are provided with connecting threads of a sleeve 9 and used for connecting the medicine-carrying winding integrated core mold with a winding machine, and the medicine-carrying winding integrated core mold is used for realizing the integral synchronous rotation of the core mold through the airfoil and the friction force when winding.
The front fixing ring and the rear fixing ring are provided with axial fixing flanges and tool mounting openings; the sleeve 9 is connected through interfaces at two ends of the charge core rod, the core mold structure is installed on a winding machine through the sleeve 9, and the composite material shell is prepared until the shell is wound.
The front connector and the rear connector are pre-embedded in the heat insulation layer forming stage, and the heat insulation layer is coated on the inner side and the outer side of the front connector and the rear connector by ethylene propylene diene monomer rubber materials; the outer surfaces of the front joint and the rear joint are consistent with the inner surface of the shell. The heat insulating layer, the front joint and the rear joint are formed through curing by a die, and the thickness of the ethylene propylene diene monomer is determined by the combustion condition of an engine.
The explosive column 6 adopts a propellant with high elastic modulus (the elastic modulus is more than or equal to 15 Mpa) and is poured in the inner cavity of the heat insulation layer, and the explosive profile is ensured by the explosive filling core rod 5 and the annular core mold 8.
Front joint 1, rear joint 2 adopt helicitic texture to be connected with preceding solid fixed ring 3, rear fixed ring 4 respectively, and wherein preceding solid fixed ring 3, rear fixed ring 4 set up limit structure and guarantee that powder charge plug 5 axial restraint, and front joint 1 and rear joint 2 adopt light high-strength metal material (such as titanium alloy, aluminum alloy or almag material), and preceding solid fixed ring 3 and rear fixed ring 4 adopt the copper alloy.
The invention adopts single-side sealing and is provided with two sealing structures, axial sealing structures are respectively arranged between the front joint 1 and the charge core rod 5 and between the front fixing ring 3 and the charge core rod 5, and the sealing during the single-side pouring of the propellant is ensured through the two sealing structures.
The annular core mold 8 adopts shape memory polymer high molecular material styrene SMP, an outer sleeve female mold is sleeved in advance, a charge core rod 5 is sleeved in the inner sleeve, then the annular core mold is pressurized, cooled and solidified into a required shape through a height Wen Chuisu and fixed on the charge core rod 5, and a polytetrafluoroethylene release agent is sprayed on the surface of the annular core mold; the high temperature refers to the process temperature which is required to be more than or equal to the glass transition temperature of the shape memory polymer high molecular material. The curing and forming temperature of the propellant is lower than the glass transition temperature of the shape memory polymer high molecular material.
Giving detailed process steps of the forming method
The shaped grain is taken out and cooled at room temperature, and the front fixing ring 3, the rear fixing ring 4 and the sleeve 9 are sequentially arranged through threads. The winding assembly is arranged on a winding machine through the clamping sleeve 9, the resin fiber composite material winding belt is connected, the winding tension, the number of layers, the angle of the layers and other parameters are adjusted, the program is operated, and the winding forming of the composite material shell is completed.
And after the winding forming is finished, the winding structural part is placed in an oven to be pre-cured for 2 hours at the temperature of 90 ℃, and then is cured for 12 hours at the temperature of 2MPa and 70 ℃, so that the curing forming of the composite material shell is finished.
After the composite material shell is cured and formed, the temperature of the oven is continuously increased to be greater than or equal to the glass transition temperature of the shape memory polymer high molecular material, the temperature is kept for a period of time until the annular core mold is softened to the initial shape, and then the annular core mold is taken out and the charge core rod is taken out to complete demolding after the temperature is reduced to the room temperature.
The annular core mold of the shape memory polymer high polymer material can be matched with the female mold and the charge core mold for repeated use, so that the production cost is saved, and the production efficiency is improved.
Examples of the present invention are given below.
The utility model provides a take medicine winding integration mandrel structure, this take medicine winding integration mandrel contains engine propellant for replace traditional ablation formula or split type mandrel, adopt powder charge plug to realize that the shaping of medicine face bears with the winding, simplify compound casing forming process, realize taking the compound casing winding shaping of medicine state.
The outer diameter of the cylinder section of the integrated core mould with the medicine winding is phi 150mm, the diameter of a winding pole hole of the front connector is phi 64mm, the diameter of a winding pole hole of the rear connector is phi 110mm, the total length of the core mould is 470mm, and the total length of a winding area is 290mm.
The front joint and the rear joint are of a semi-ellipsoid structure, the ellipsoid ratio is 2, the front joint is connected with the front fixing ring by adopting M50 multiplied by 2 threads, and the rear joint is connected with the rear fixing ring by adopting special B100 multiplied by 2.
The outer sides of the front connector and the rear connector are coated with a rear heat insulation layer of 0.5mm, the thickness of the whole heat insulation layer is about 3mm, and the heat insulation layer, the front connector and the rear connector are integrally cured and molded.
The outer diameter of the cylindrical section of the charging core rod is 30mm, the width of each wing is 10mm, the diameter of the outer circle of each wing is 76mm, the contact molded surface of each wing and the medicine surface is sprayed with a polytetrafluoroethylene release agent, and the threaded interfaces at two ends of the core rod are M27 multiplied by 2 and are connected with the sleeve 9.
The width of the nonmetal memory core mold is 10mm, the radius of the outer end cambered surface is 45mm, the distance from the front end surface of the charge core rod is 110mm, and the nonmetal memory core mold is tightly connected with the charge core rod through a charge core rod notch.
The heat insulating layer is made of ablation-resistant ethylene propylene diene monomer rubber, the front joint and the rear joint are made of TC4 titanium alloy, the front fixing ring and the rear fixing ring are made of H62 hard copper, the grain core rod is made of 2A12 aluminum alloy, and the propellant is a butyl hydroxyl propellant.
The used integrated core mould with the medicine winding changes the environmental temperature after the winding and curing of the composite shell are finished, and the non-metal memory core mould stripping, the medicine filling core mould stripping and the medicine surface shaping are carried out.
The integrated core mold structure with the medicine winding is trial-manufactured, the manufacturability and the producibility of the product are verified, and meanwhile, the trial-manufacturing of the composite shell is performed, so that the preparation requirement of the compound shell with the medicine winding is met.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.
Those skilled in the art will appreciate that the details of the invention not described in detail in this specification are well within the skill of those in the art.

Claims (7)

1. The utility model provides a nonmetal mandrel structure of memory suitable for take medicine winding which characterized in that includes: the device comprises a front joint (1), a rear joint (2), a front fixing ring (3), a rear fixing ring (4), a charging core rod (5), a charge column (6), a heat insulating layer (7) and an annular core mold (8);
an annular core mold (8) is fixed on a charge core rod (5) to form a charge core mold combined structure, a charge column (6) is arranged inside a heat insulating layer (7), a front joint (1) and a rear joint (2) are prefabricated at the front end and the rear end of the heat insulating layer (7), the charge core mold combined structure is attached to a charge profile, the two ends of the charge core rod (5) are fixed with a rear fixing ring (4) through a front fixing ring (3), the front joint (1) and the rear joint (2) are respectively connected with the front fixing ring (3) and the rear fixing ring (4) through thread structures, and the front fixing ring (3) and the rear fixing ring (4) are provided with limit structures to ensure that the charge core rod (5) is axially constrained; axial sealing structures are arranged between the front joint (1) and the charging core rod (5) and between the front fixing ring (3) and the charging core rod (5);
the annular core mold (8) is made of shape memory polymer high polymer materials, a female mold is sleeved in advance, the charge core rod (5) is sleeved in the annular core mold, then the annular core mold is solidified into a ring shape through the high Wen Chuisu by pressurization and cooling and is fixed on the charge core rod (5), and a polytetrafluoroethylene release agent is sprayed on the surface of the annular core mold; the high temperature refers to the process temperature which is more than or equal to the glass transition temperature of the shape memory polymer high molecular material;
the rear part of the drug profile surface of the drug column (6) is a wing surface, the middle part is an inner hole surface, and the front part is an annular surface; the charge core mold combination structure is a propellant forming core mold, the propellant charge shape is annular at the front part, porous in the middle part and columnar at the rear part, and the charge core mold combination structure is formed by casting by adopting a mold;
the molded surfaces of the charge core rod (5) and the annular core mold (8) are matched and attached to the molded surface of the medicine, the large end of the charge core rod (5) is the pouring side of the propellant, connecting interfaces of sleeves (9) are reserved at the two ends of the charge core rod (5) and used for being connected with a winding machine, and the charge core rod (5) and the annular core mold (8) realize that the medicine is simultaneously used as a winding core shaft.
2. The memory non-metal core mold structure suitable for winding with medicine according to claim 1, characterized in that: the front fixing ring (3) and the rear fixing ring (4) are provided with axial fixing flanges and tool mounting openings; the two ends of the core charging rod (5) are connected with the sleeves (9), the core mold structure is installed on a winding machine through the sleeves (9), and the composite material shell is prepared until the shell is wound.
3. The memory non-metal core mold structure suitable for winding with medicine according to claim 2, characterized in that: the front connector (1) and the rear connector (2) are pre-embedded in the molding stage of the heat insulation layer (7), and the heat insulation layer (7) is coated on the inner side and the outer side of the front connector (1) and the rear connector (2) by ethylene propylene diene monomer; the outer surfaces of the front joint (1) and the rear joint (2) are consistent with the inner surface of the shell.
4. The memory non-metal core mold structure suitable for winding with medicine according to claim 1, characterized in that: the charging core rod (5) is made of an aluminum alloy material, a polytetrafluoroethylene release agent is sprayed on the surface of the charging core rod, and the release taper is set to ensure the dismounting of the charging core rod (5); the front joint (1) and the rear joint (2) are made of titanium alloy, aluminum alloy or aluminum-magnesium alloy, and the front fixing ring (3) and the rear fixing ring (4) are made of copper alloy.
5. The memory non-metal core mold structure suitable for winding with medicine according to claim 1, characterized in that: the curing and forming temperature of the propellant is lower than the glass transition temperature of the shape memory polymer high molecular material; after the grain is formed, the temperature of the oven is continuously increased to be more than or equal to the glass transition temperature of the shape memory polymer high molecular material, the temperature is kept for a period of time until the annular core mold (8) is softened into an initial shape, and then the temperature is reduced to room temperature, the annular core mold (8) and the charge core rod (5) are taken out to complete demoulding.
6. The memory non-metal core mold structure suitable for winding with medicine according to claim 1, characterized in that: the explosive column (6) is cast in the inner cavity of the heat insulating layer (7) by adopting a propellant with the elastic modulus of more than or equal to 15Mpa, and the explosive profile is ensured by the explosive filling core rod (5) and the annular core mold (8).
7. A shell forming method based on the memory non-metal core mold structure suitable for winding with medicine in claim 1 is characterized by comprising the following steps:
(1) The core mold structure after charging is sent to an oven for curing, and after curing of the explosive column is finished, the outer mold is removed, so that a winding core mold containing the explosive column (6), the front connector (1), the rear connector (2) and the heat insulation layer (7) is obtained;
(2) The front fixing ring (3), the rear fixing ring (4) and the sleeve are connected with the front end and the rear end of the winding core mold through threads to obtain a complete winding core mold;
(3) Installing a winding core mould on a winding machine tool, setting a layer spreading angle and winding tension parameters and operating a program to complete the winding forming of the composite shell;
(4) And after winding, conveying the structural part to an oven for precuring for 2 hours at 90 ℃, and then curing for 12 hours at 2MPa and 70 ℃ to realize the curing and molding of the composite material shell.
CN202011181755.8A 2020-10-29 2020-10-29 Memory non-metal core mold structure suitable for winding with medicine and shell forming method Active CN112571822B (en)

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