Solid rocket engine internal insulation layer preforming production line and production method

Abstract

The invention belongs to the technical field of solid rocket engine inner heat insulation layers, and particularly relates to a solid rocket engine inner heat insulation layer preforming production line and a solid rocket engine inner heat insulation layer preforming production method.The solid rocket engine inner heat insulation layer preforming production line comprises a forming unit and a transfer system; a feeding and discharging device used for feeding and discharging of the multi-layer hot press is arranged on one side of the multi-layer hot press, the forming unit further comprises an upper mold lifting device used for lifting and falling an upper mold so that the upper mold and a lower mold can be buckled or demolded, and the transfer system comprises an electric flat car used for transferring the upper mold and the lower mold. A three-layer or more plate frame lower jacking type hydraulic machine form is adopted as a forming unit, multiple interlayer molds can be independently moved in / out, lifted outside the machine and rapidly replaced, the mold filling difficulty is reduced, the mold filling efficiency is greatly improved, mixed line production of inner heat insulation layer parts of two or more specifications can be met, the whole line has full-automatic operation, the production efficiency is improved, and the production cost is reduced. Manual intervention is not needed, and production efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of solid rocket engine inner thermal insulation layers, and in particular relates to a preforming production line and a production method for a solid rocket engine inner thermal insulation layer. Background Art

[0002] The inner insulation layer is located between the solid propellant and the engine casing of the solid rocket engine, and plays the role of preventing excessive temperature in the engine combustion chamber, high-gas flow erosion, high-speed erosion of combustion particles, heat loss and structural support. EPDM insulation material is the most widely used type of insulation material in the third-generation rocket engine. EPDM insulation material can be used for the inner insulation layer of advanced solid rocket engines with NEPE high-energy propellants and azide propellants, and high-overload erosion solid rocket engines. It can also be used as a sheath material on the outside of the propellant. EPDM rubber has low density, high thermal decomposition temperature, large heat absorption, high elongation, good ablation resistance, resistance to plasticizer migration, high temperature / high humidity environment, heat resistance and oxidation resistance / aging, good compatibility with the nozzle shell material, and can form an ideal contact interface. It is an ideal inner insulation layer material. EPDM rubber with high-performance organic fiber and high-temperature resistant filler can greatly improve the performance of the inner insulation layer. It has good ablation resistance at temperatures of 2000℃ to 4000℃, so the current application of modified EPDM composite materials is widely used. Its preforming process generally adopts vulcanization molding, vulcanization tank vulcanization, airbag pressurization or hot pressing curing.

[0003] The traditional airbag pressurization process used for forming the thermal insulation layer in solid rocket engines uses raw rubber for the thermal insulation layer and a complex pressurized oven device to complete the flow forming and cross-linking curing process under the high pressure of the airbag. The fiber distribution uniformity, molding thickness and surface quality are difficult to control, and the molding conditions are also relatively harsh, so it is gradually replaced by hot pressing molding technology.

[0004] In order to ensure uniform fiber distribution and thickness uniformity, more and more modified EPDM composite materials adopt the preforming process. The preforming is generally carried out by a flat hot press. However, the inner insulation layer is generally preformed to obtain a preformed part of a specific shape (generally a cylinder, a cone or a parabola). The height of the part is large and a non-flat forming mold with a higher size is required. Therefore, the press opening is large. Generally, single-layer and multi-layer hot presses are used for forming. The height of the multi-layer hot press is also large, and the mold weight is relatively large, so the problem of loading and unloading the mold becomes extremely difficult. The traditional method is to load and unload the mold by manual lifting, which is inefficient. Due to the long hot holding time (generally more than 1.5 hours), the output efficiency needs to be improved. The efficiency of the single-layer hot press is low and it is difficult to adapt to the current commercial application of solid rocket engines. The efficiency of the multi-layer hot press is improved, but the heavier mold needs to be lifted to a higher position to be loaded into the press, which is difficult to operate manually and the mold change efficiency is also low.

[0005] The current hot-press vulcanization or hot-press curing process has the disadvantages of long hot holding time, large deformation of molded parts, low degree of automation, and low efficiency, which are also urgent problems that need to be solved for the current commercialization of solid rocket engines. At the same time, the current commercial application of solid rocket engines requires customized production, with the characteristics of small batches and multiple specifications. Therefore, the production line needs to meet the mixed-line production of internal insulation layer parts with different specifications. During loading and unloading, the upper and lower molds are generally in a buckled state, and offline demolding is more difficult. The loading and unloading area is far away from the press, and mold transfer and loading and unloading are more difficult. Summary of the invention

[0006] In order to solve the problems in the prior art, the present invention provides a solid rocket engine inner insulation layer preforming production line and production method, which can reduce the difficulty of mold installation and greatly improve the mold installation efficiency, and can meet the purpose of mixed-line production of inner insulation layer parts of two or more specifications.

[0007] The present invention solves the technical problem by adopting the following technical solutions:

[0008] The object of the present invention is to provide a preforming production line for the internal insulation layer of a solid rocket engine, comprising a molding unit and a transfer system, the molding unit comprising a multi-layer hot press for hot pressing materials in an upper mold and a lower mold, a loading and unloading device for loading and unloading materials for the multi-layer hot press is provided on one side of the multi-layer hot press, the molding unit also comprises an upper mold lifting device for lifting and lowering the upper mold so that the upper mold and the lower mold can be engaged or demolded, and the transfer system comprises an electric flat car for transferring the upper mold and the lower mold.

[0009] Furthermore, the transfer system also includes a main rail, a loading and unloading robot is provided at one end of the main rail, and a charging pile is provided at the other end of the main rail. The electric flat car moves between the main rail, the upper mold lifting device, and the loading and unloading device.

[0010] Furthermore, the upper die lifting device includes a frame, a hydraulic cylinder is provided on the frame, a latch slide is provided at the output end of the hydraulic cylinder, a hydraulic latch is provided on the latch slide, and the upper die is provided with a positioning hole for the hydraulic latch to penetrate.

[0011] Furthermore, an online detection device is provided on one side of the upper die lifting device to detect whether the material is qualified.

[0012] Furthermore, the loading and unloading device includes a lifting slide block, a hydraulic clamp and a lifting drive cylinder, the output end of the lifting drive cylinder is connected to the lifting slide block, and the hydraulic clamp is connected to the lifting slide block.

[0013] Furthermore, the electric flat car is provided with a table, the lower mold is arranged on the table, the table is provided with a T-slot, the multi-layer hot press is provided with a moving in and out cylinder, and the output end of the moving in and out cylinder is provided with a T-joint combined with the T-slot.

[0014] Furthermore, the molding unit also includes a heating and cooling system and a hydraulic system, and the heating and cooling system is connected to the multi-layer hot press.

[0015] Furthermore, there are multiple molding units, the main rail is arranged between the multiple molding units, and a whole line control system is arranged on one side of the main rail.

[0016] A production method for a solid rocket engine inner insulation layer preforming production line comprises the following steps:

[0017] S1: The loading and unloading robot places the material on the lower die on the electric flat car;

[0018] S2: The electric flat car transfers the lower die with the laid material to the upper die lifting station for positioning, and the online detection device performs online detection on whether the material laying is qualified; after the detection is qualified, the upper die lifting device drops the upper die to make the upper die and the lower die buckle;

[0019] S3: The electric flat car moves the upper mold and the lower mold with the material laid on it into the loading and unloading device. The loading and unloading device clamps the table plate carrying the mold through the hydraulic clamp on the lifting slide. After clamping the table plate, the lifting drive cylinder drives the lifting slide to drive the table plate and the upper mold and the lower mold to rise and fall to the mold loading height. The T-slot of the table plate is combined with the T-joint driven by the moving in and out cylinder;

[0020] S4: The upper jaw of the hydraulic clamp opens, and the in-and-out cylinder drives the table through the T-joint to pull the upper and lower molds layer by layer into the mold area of ​​the multi-layer hot press;

[0021] S5: After the multi-layer hot press machine completes the mold loading of all layers, the multi-layer hot press machine performs mold closing;

[0022] S6: After the multi-layer hot press machine is closed, the mold is heated by the heating and cooling system, the multi-layer hot press machine is pressurized and maintained, and then the temperature is maintained, and hot pressing is continued until the preforming is completed;

[0023] S7: After the preforming is completed, the mold is cooled at a variable temperature drop rate through the heating and cooling system;

[0024] S8: In the return stroke of the multi-layer hot press, the in-and-out cylinder drives the table through the T-joint to move the upper die and the lower die out of the multi-layer hot press die area layer by layer. The upper jaw of the hydraulic clamp clamps the table, and the table, the upper die and the lower die are lowered to the electric flat car for positioning under the drive of the lifting drive cylinder. Then the hydraulic clamp is released, and the lifting slide rises and resets;

[0025] S9: The electric flat car moves to the upper die lifting station, the hydraulic pin on the frame penetrates into the positioning hole of the upper die, and the hydraulic cylinder drives the pin slider to lift, which drives the upper die to lift, so that the inner insulation layer preformed part is demoulded, and the upper die remains at the upper die lifting station;

[0026] S10: The electric flat car moves the lower die and the preformed parts of the inner insulation layer on the lower die to the loading and unloading station. The loading and unloading robot unloads the parts and stacks the removed parts to complete a cycle.

[0027] Furthermore, it also includes mixed-line production of preformed parts of inner insulation layers of various specifications: using multiple multi-layer hot presses equipped with electric flat cars sharing the main guide rails, the electric flat cars are dispatched through the production line master control system, and multiple multi-layer hot presses are pressed and loaded and unloaded alternately.

[0028] Compared with the prior art, the beneficial technical effects of the present invention are:

[0029] 1. The production line of the present invention can meet the mixed production of internal insulation layer parts with two or more specifications, multi-specification products, especially the mixed production of internal insulation layer parts with multiple specifications with relatively large differences; it is compatible with molds of different sizes (the maximum size does not exceed the multi-layer hot press table, and the minimum size is not less than 2 / 3 of the multi-layer hot press table) and square, round or other special-shaped shapes.

[0030] 2. The single production unit of the present invention (multi-layer hot press, loading and unloading device, upper mold lifting device, two electric flat cars) has the ability to independently and continuously automatically produce preformed parts of a single specification of internal insulation layer, and uses two electric flat cars for switching, which greatly reduces the time for laying and transportation.

[0031] 3. The table and the mold of the present invention form a molding module. The specifications of the table of a single multi-layer hot press machine are unified, and consistent connection interfaces are reserved. They will flow together during transportation and loading and unloading, so that the requirements for the shape and size of the mold are lowered (it can be compatible with square and round molds of different sizes (the maximum size does not exceed the hot press table, and the minimum size is not less than 2 / 3 of the hot press table)).

[0032] 4. The loading and unloading device of the loading and unloading station of the present invention has the functions of table clamping (hydraulic clamping), lifting and lowering of the lifting slider (driven by the lifting drive cylinder), docking of the T-joint of the table, pulling in / pushing out of the table (driven by the moving in / out cylinder), etc. The control system determines whether the table is lifted and in place through the in-place detection switch of each layer (the T-joint driven by the moving in / out cylinder is in place in advance, and the T-joint is automatically docked when the lifting slider drives the table in place), and the T-joint is automatically docked; after the table is moved out, the T-joint is disengaged, which is the reverse process of the above, and is also completed automatically. The above structure can automatically complete the lifting of the table to the horizontal push-pull conversion T-connection without additional power, which is simple and efficient.

[0033] 5. Each hot press of the present invention has three or more layers, and the maximum weight of the mold for the preformed parts of the inner insulation layer produced can reach 2 tons. The mold loading is fully automatic, which reduces the difficulty of mold loading and greatly improves the efficiency of mold loading.

[0034] 6. The upper mold lifting station of the present invention is a loading detection station, which can detect whether the loading is up to standard and prevent the occurrence of pre-forming quality problems; at the same time, the upper mold lifting station takes into account the mold opening function, which has a large mold opening force and can cope with various parts that require a large demolding force.

[0035] 7. In the present invention, multiple preforming units share a charging pile, and when the electric flat car is low on power, they can automatically charge in turn.

[0036] 8. The whole-line control system of the production line of the present invention has the production scheduling capability of multiple molding units. The molding and loading of multiple molding units are carried out alternately, and the guide rails can be shared in a time-sharing manner.

[0037] 9. Except for blank preparation, the entire line of the present invention is fully automatic in production, integrating the transfer systems of multiple multi-layer presses (electric flat cars, charging piles, main rails, loading and unloading robots, etc.), with a compact structure, small footprint, high utilization rate of the transfer system, and greatly improved efficiency of the entire line.

[0038] 10. The present invention adopts online variable temperature drop rate cooling, which can reduce the deformation of the inner insulation layer preformed parts after cooling by adjusting the temperature drop curve parameters, thereby improving the product qualification rate.

[0039] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above contents of the present invention and its objectives, features and advantages more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The present invention is a schematic diagram of a preforming production line for the inner insulation layer of a solid rocket engine.

[0041] Figure 2 The present invention is a schematic structural diagram of a loading and unloading device in a solid rocket engine internal insulation layer preforming production line.

[0042] Figure 3 The present invention is a schematic diagram of the preforming process of a preforming production line for the inner insulation layer of a solid rocket engine.

[0043] 1-platen, 2-upper die, 3-lower die, 4-loading and unloading station, 5-upper die lifting station, 6-loading and unloading station, 110-multi-layer hot press, 111-moving in and out cylinder, 120-hydraulic system, 130-heating and cooling system, 140-loading and unloading device, 141-lifting slide block, 142-hydraulic clamp, 143-lifting drive cylinder, 150-upper die lifting device, 151-latch slide block, 152-hydraulic latch, 160-control cabinet, 170-power cabinet, 180-press operating table, 210-electric flat car, 220-main rail, 230-loading and unloading manipulator, 240-charging pile, 250-whole line control system. DETAILED DESCRIPTION

[0044] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only exemplary illustrations and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0045] A solid rocket engine internal insulation layer preforming production line includes a multi-layer hot press 110, a hydraulic system 120, a heating and cooling system 130, a loading and unloading device 140, an electric flat car 210, a control cabinet 160, a power cabinet 170, a press operating table 180, a whole line control system 250, an upper mold lifting device 150, a charging pile 240, a main rail 220, a loading and unloading manipulator 230, etc., wherein the multi-layer hot press 110, the hydraulic system 120, the heating and cooling system 130, the loading and unloading device 140, the control cabinet 160, the power cabinet 170, the press operating table 180, the whole line control system 250, the upper mold lifting device 150, the charging pile 240, the main rail 220, the loading and unloading manipulator 230, etc. Cabinet 160, power cabinet 170, press operating table 180, upper mold lifting device 150, etc. constitute a single molding unit, which is used for the production of internal insulation layer parts of a single specification. The production line is equipped with multiple molding units at the same time, which can produce internal insulation layer parts of multiple specifications at the same time. Correspondingly, electric flat car 210, whole line control system 250, charging pile 240, main rail 220, loading and unloading robot 230, etc. are used as transfer systems for multiple molding units to share, which can alternately perform pressing and molding and mold changing and loading to improve production efficiency.

[0046] In a single molding unit, the heating and cooling system 130 is connected to the multi-layer hot press 110 to heat and cool the multi-layer hot press 110. The loading and unloading device 140 is at the loading and unloading station 6 on one side of the multi-layer hot press 110, and is used for loading and unloading the multi-layer hot press 110. The hydraulic system 120 provides hydraulic power for the single molding unit. The control cabinet 160, the power cabinet 170, and the press operating table 180 are used to control the operation of the single molding unit. The upper mold lifting device 150 is arranged on one side of the upper mold lifting station 5, and is used to lift and lower the upper mold 2, so that the upper mold and the lower mold 3 are engaged or demolded. The upper mold lifting device 150 is also equipped with an online detection device for detecting whether the material is qualified, so that the upper mold lifting station 5 has both loading detection and demolding functions; the lower mold 3 is arranged on the table plate 1, and the table plate 1 is arranged on the electric flat car 210.

[0047] The main rail 220 is set to penetrate between multiple molding units. A loading and unloading station 4 is set at one end of the main rail 220. The loading and unloading manipulator 230 is set at one side of the loading and unloading station 4, which is used to load and unload raw materials or finished products in the lower mold 3. The charging pile 240 is set at the other end of the main rail 220 for charging the electric flat car 210. The electric flat car 210 moves between the loading and unloading station 4, the upper mold lifting station 5 and the loading and unloading station 6 to transfer the upper and lower molds 3. The whole line control system 250 is used to control the operation of multiple molding units of the production line. The charging pile 240 is a shared charging pile 240. Whether it is a single molding unit (a single hot press is equipped with two electric flat cars 210) or the electric flat cars 210 of multiple molding units, they are automatically charged at a charging pile 240, with high integration, compact structure, and construction cost saving.

[0048] The electric flat car 210 adopts a rail-wheeled structure, with an overall load of up to 5 tons. It can automatically perform cross-reversing operation and is driven by a lithium battery pack. When the production line is running continuously, the endurance is not less than one shift (8 hours), which is convenient for routine maintenance during shift handover. It has two modes: automatic operation and wireless manual remote control. It is electrically interlocked with the loading and unloading device 140, the upper mold lifting device 150 and the loading and unloading manipulator 230, and is equipped with collision detection, which has good safety.

[0049] The loading and unloading device 140 includes a lifting slider 141, a hydraulic clamp 142 and a lifting drive cylinder 143. The output end of the lifting drive cylinder 143 is connected to the lifting slider 141. The hydraulic clamp 142 is connected to the lifting slider 141. The lifting drive cylinder 143 drives the lifting slider 141 and the hydraulic clamp 142 to move up and down. The hydraulic clamp 142 is used to clamp the table 1 that supports the mold.

[0050] A T-slot is provided at the end of the table 1, and the multi-layer hot press 110 is provided with a moving-in and moving-out oil cylinder 111. A T-joint is provided at the output end of the moving-in and moving-out oil cylinder 111. The T-joint is combined with the T-slot to pull the mold on the table 1 into or out of the multi-layer hot press 110. The table 1 at the loading and unloading station 6 is automatically lifted to the horizontal push-pull conversion T-connection, without additional power, simple and efficient.

[0051] The upper mold lifting device 150 includes a frame, on which a hydraulic cylinder is provided, a latch slider 151 is provided at the output end of the hydraulic cylinder, a hydraulic latch 152 is provided on the latch slider 151, and the upper mold is provided with a positioning hole for the hydraulic latch 152 to penetrate. The latch slider 151 and the hydraulic latch 152 are driven up and down by the hydraulic cylinder, thereby driving the upper mold 2 to move up and down, and then the upper mold 2 is engaged or demolded with the lower mold 3.

[0052] A production method for a solid rocket engine inner insulation layer preforming production line comprises the following steps:

[0053] Working cycle of a single molding unit:

[0054] 1. The electric flat car 210 automatically charges at the charging pile 240 when idle, and enters the loading and unloading station 4 after charging, and performs positioning and centering at the loading and unloading station 4. After centering, the loading and unloading manipulator 230 lays the EPDM composite material filled with high-performance organic fiber and high-temperature resistant filler on the lower mold 3 on the electric flat car 210;

[0055] 2. The electric flat car 210 transfers the lower mold 3 with the material laid to the upper mold lifting station 5 for positioning, and the online detection device performs online detection on whether the material laying is qualified. After the detection is qualified, the upper mold lifting device 150 drops the upper mold 2 to make it buckle with the lower mold 3;

[0056] 3. The electric flat car 210 moves the upper and lower molds with materials laid on them into the loading and unloading station 6. The electric flat car 210 is accurately centered and automatically locked. The loading and unloading device 140 at the loading and unloading station 6 clamps the table 1 carrying the mold through the hydraulic clamp 142 on the lifting slide 141. After clamping the table 1, the lifting drive cylinder 143 drives the lifting slide 141 to drive the table 1 and the upper and lower molds thereon to rise and fall to the mold loading height. The T-slot at the end of the table 1 will automatically connect with the T-joint driven by the moving in and out cylinder 111.

[0057] 4. The upper jaw of the hydraulic clamp 142 opens, and the in-and-out cylinder 111 drives the table 1 through the T-joint to pull the upper and lower molds layer by layer into the mold area of ​​the multi-layer hot press 110;

[0058] 5. After the multi-layer hot press machine 110 completes the mold loading of all layers, the multi-layer hot press machine 110 performs mold closing;

[0059] 6. After the multi-layer hot press machine 110 is closed, the mold is heated by the external heating and cooling system 130, and the multi-layer hot press machine 110 is pressurized and maintained. After the mold reaches the process temperature, the temperature is maintained at a constant level, and hot pressing is continued until the preforming is completed;

[0060] 7. After the preforming is completed, the mold is cooled at a variable temperature drop rate by an external heating and cooling system 130 until it is cooled to a temperature at which the mold can be unloaded;

[0061] 8. The press of the multi-layer hot press 110 returns. The in-and-out cylinder 111 drives the table 1 through the T-joint to move the upper and lower molds out of the mold area of ​​the multi-layer hot press 110 layer by layer, and limits the table 1 at the loading and unloading station 6. The upper jaws of the hydraulic clamp 142 clamp the table 1, and the table 1 and the upper and lower molds are lowered to the electric flat car 210 for positioning under the drive of the lifting drive cylinder 143. The hydraulic clamp 142 on the lifting slide 141 is released, and the lifting slide 141 rises and resets;

[0062] 9. The electric flat car 210 moves to the upper die lifting station 5. The hydraulic latch 152 on the side frame of this station penetrates into the positioning hole of the upper die 2. The hydraulic cylinder drives the latch slider 151 to lift, driving the upper die 2 to lift into place, so that the inner insulation layer preformed part is demoulded, and the upper die 2 remains at the upper die lifting station 5.

[0063] 10. The electric flat car 210 moves the lower mold 3 and the preformed parts of the inner insulation layer on the lower mold 3 to the loading and unloading station 4. The loading and unloading robot 230 unloads the parts and stacks the removed parts to complete a cycle.

[0064] When preformed parts of various specifications of inner heat insulation layers are mixed-line produced, multiple multi-layer hot presses 110 are equipped with electric flat cars 210 and share the main guide rail 220. The electric flat cars 210 are dispatched by the whole line control system 250 of the production line, and the pressing of multiple multi-layer hot presses 110 and the loading and unloading of molds are carried out alternately, which greatly reduces the waiting time.

[0065] The present invention can mainly solve the problem of rapid mold change and material loading and unloading of multiple inter-layer molds of a multi-layer (three-layer or more) press, and the problem of mixed-line production of internal insulation layer parts of two or more specifications.

[0066] The present invention provides a preforming production line for the inner insulation layer of a solid rocket engine. The preforming unit adopts a three-layer or more plate frame bottom top hydraulic press. Multiple interlayer molds can be independently moved in / out, lifted and lowered outside the machine, and have the functions of rapid mold change. The maximum mold loading height is not less than 3m, and the maximum automatic mold loading can reach 2 tons. The material loading and unloading and replacement of heavy molds can be realized quickly, greatly reducing the preparation time. Multiple interlayer molds can alternately use the electric flat car 210, which is operated on rails to improve the utilization rate, use efficiency and positioning accuracy of the electric flat car 210. The heating and cooling system 130 can realize rapid heating and cooling of the mold. When multiple multi-layer hot presses 110 are forming and producing parts of various specifications at the same time, they can alternately perform pressing and mold change and loading, greatly improving the output efficiency. Multiple multi-layer hot presses 110 and electric flat cars 210 share a common track to enter the unloading and loading area. The loading and unloading area is equipped with a heavy-duty manipulator, which can load and unload materials and improve efficiency. The electric flat car 210 can automatically run to the unified charging pile 240 for charging when it is idle. The entire line is fully automated, requiring no human intervention and has high production efficiency.

[0067] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0068] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A solid rocket engine internal insulation layer preforming production line, characterized in that: The invention comprises a molding unit and a transfer system. The molding unit comprises a multi-layer hot press (110) for hot pressing materials in an upper mold (2) and a lower mold (3). A loading and unloading device (140) for loading and unloading materials for the multi-layer hot press (110) is provided on one side of the multi-layer hot press (110). The molding unit also comprises an upper mold lifting device (150) for lifting and lowering the upper mold (2) so that the upper mold (2) and the lower mold (3) can be engaged or demolded. The transfer system comprises an electric flat car (210) for transferring the upper mold (2) and the lower mold (3).

2. A solid rocket engine inner insulation layer preforming production line as claimed in claim 1, characterized in that: The transfer system also includes a main rail (220), a loading and unloading robot (230) is provided at one end of the main rail (220), a charging pile (240) is provided at the other end of the main rail (220), and the electric flat car (210) moves between the main rail (220), the upper mold lifting device (150), and the loading and unloading device (140).

3. A solid rocket engine inner insulation layer preforming production line as claimed in claim 1, characterized in that: The upper die lifting device (150) comprises a frame, a hydraulic cylinder is arranged on the frame, a latch slide block (151) is arranged at the output end of the hydraulic cylinder, a hydraulic latch (152) is arranged on the latch slide block (151), and the upper die (2) is provided with a positioning hole for the hydraulic latch (152) to penetrate.

4. A solid rocket engine inner insulation layer preforming production line as claimed in claim 3, characterized in that: An online detection device is provided on one side of the upper die lifting device (150) for detecting whether the material is qualified.

5. A solid rocket engine inner insulation layer preforming production line as claimed in claim 1, characterized in that: The loading and unloading device (140) comprises a lifting slider (141), a hydraulic clamp (142) and a lifting drive cylinder (143); the output end of the lifting drive cylinder (143) is connected to the lifting slider (141), and the hydraulic clamp (142) is connected to the lifting slider (141).

6. A solid rocket engine inner insulation layer preforming production line as claimed in claim 5, characterized in that: The electric flat car (210) is provided with a table (1), the lower mold (3) is arranged on the table (1), the table (1) is provided with a T-shaped slot, the multi-layer hot press (110) is provided with a moving-in and moving-out cylinder (111), and the output end of the moving-in and moving-out cylinder (111) is provided with a T-shaped joint combined with the T-shaped slot.

7. A solid rocket engine inner insulation layer preforming production line as claimed in claim 1, characterized in that: The molding unit further comprises a heating and cooling system (130), wherein the heating and cooling system (130) is connected to the multi-layer hot press (110).

8. A solid rocket engine inner insulation layer preforming production line as claimed in claim 2, characterized in that: There are a plurality of molding units, the main guide rail (220) is arranged between the plurality of molding units, and a whole-line control system (250) is provided on one side of the main guide rail (220).

9. The production method of a solid rocket engine inner insulation layer preforming production line according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: The loading and unloading robot (230) places the material on the lower mold (3) on the electric flat car (210); S2: The electric flat car (210) transfers the lower mold (3) on which the material is laid to the upper mold lifting station (5) for positioning, and the online detection device performs online detection to determine whether the material laying is qualified; after the detection is qualified, the upper mold lifting device (150) drops the upper mold (2) so that the upper mold (2) and the lower mold (3) are buckled together; S3: The electric flat car (210) moves the upper mold (2) and the lower mold (3) on which the material is laid to the loading and unloading device (140). The loading and unloading device (140) clamps the table (1) carrying the mold through the hydraulic clamp (142) on the lifting slide (141). After the table (1) is clamped, the lifting drive cylinder (143) drives the lifting slide (141) to drive the table (1) and the upper mold (2) and the lower mold (3) to rise and fall to the mold loading height. The T-slot of the table (1) is connected to the T-joint driven by the moving in and out cylinder (111); S4: The upper jaw of the hydraulic clamp (142) is opened, and the in-and-out cylinder (111) drives the table (1) through the T-joint to pull the upper mold (2) and the lower mold (3) layer by layer into the mold area of ​​the multi-layer hot press (110); S5: After the multi-layer hot press machine (110) completes the mold loading of all layers, the multi-layer hot press machine (110) performs mold closing; S6: After the multi-layer hot press (110) is closed, the mold is heated by the heating and cooling system (130), and the multi-layer hot press (110) is pressurized and maintained, and then maintained at a constant temperature, and hot pressing is continued until the preforming is completed; S7: After the preforming is completed, the mold is cooled by a heating and cooling system (130); S8: The press of the multi-layer hot press (110) returns, the moving-in and moving-out oil cylinder (111) drives the table (1) through the T-joint to move the upper mold (2) and the lower mold (3) out of the mold area of ​​the multi-layer hot press (110) layer by layer, the upper claw of the hydraulic clamp (142) clamps the table (1), and the table (1) and the upper mold (2) and the lower mold (3) are lowered to the electric flat car (210) for positioning under the drive of the lifting drive oil cylinder (143), and then the hydraulic clamp (142) is released, and the lifting slide block (141) rises and resets; S9: the electric flat car (210) moves to the upper die lifting station (5), the hydraulic latch (152) on the frame penetrates into the positioning hole of the upper die (2), and the hydraulic cylinder drives the latch slider (151) to lift, driving the upper die (2) to lift, so that the inner insulation layer preformed part is demoulded, and the upper die (2) remains at the upper die lifting station (5); S10: The electric flat car (210) moves the lower mold (3) and the preformed parts of the inner insulation layer on the lower mold (3) to the loading and unloading station (4), and the loading and unloading robot (230) unloads and stacks the removed parts, completing a cycle.

10. The production method of the solid rocket engine inner insulation layer preforming production line as claimed in claim 9, characterized in that: It also includes mixed-line production of preformed parts of inner insulation layers of various specifications: multiple multi-layer hot presses (110) are equipped with an electric flat car (210) sharing a main guide rail (220), the electric flat car (210) is dispatched through the overall control system of the production line, and the pressing of multiple multi-layer hot presses (110) and the loading and unloading of molds are carried out alternately.

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