Horizontal splicing and compacting system and method for long-size sand core mold

Abstract

The application discloses a horizontal splicing and pressing system and a pressing method for a long-size sand core mold, and relates to the technical field of forming and manufacturing of rocket engine shells. The system comprises a pressing mechanism walking track, a core shaft fixing support mechanism, a core shaft support lifting mechanism, a pressing mechanism and a sand cake support sleeve and the like components. Through the horizontal splicing mode, the height limitation of the traditional vertical splicing workshop is overcome, and the sand core mold section splicing is suitable for large-size and long-size sand core molds. The pressing mechanism is provided with a pressure sensor, the pressing force between the sand cakes can be monitored in real time, and the end face of the sand cake is prevented from being pressed and crushed due to excessive pressing force. The method utilizes the system, realizes the horizontal splicing and pressing of the sand core mold, and improves the operation safety and production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rocket engine shell forming manufacturing, in particular to a horizontal splicing and pressing system and method for long-specification sand core mold. BACKGROUND

[0002] At present, sand mold is widely used in the field of rocket engine shell forming. The sand core mold is mainly used to form the inner hole and cavity of the engine shell casting, and the sand core mold with regular shape and certain length often needs to be divided into multiple sections for processing. After the sand section is divided, each section of sand cake needs to be spliced into a complete sand mold according to the process.

[0003] In the prior art, the sand core mold is spliced vertically from top to bottom, and the jack is used to press the sand cake flat end surface from top to bottom, so that the sand cake is spliced firmly. This vertical splicing method has the following problems:

[0004] 1. Limited by the size of the factory building, it cannot meet the splicing of long-size sand mold;

[0005] 2. The splicing and pressing efficiency is low;

[0006] 3. The vertical operation of the jack is not safe. SUMMARY

[0007] In order to solve the above technical problems, the purpose of the present application is to provide a horizontal splicing and pressing system and method for long-specification sand core mold, which realizes the horizontal splicing and pressing of long-specification sand core mold, overcomes the limitation of traditional vertical splicing, and improves the pressing efficiency and operation safety.

[0008] To achieve the above purpose, the present application provides the following technical solutions:

[0009] In a first aspect, a horizontal splicing and pressing system for long-specification sand core mold is provided, comprising:

[0010] A pressing mechanism walking track;

[0011] A core shaft fixed support mechanism is arranged at the starting end of the pressing mechanism walking track and used to support one end of the core shaft;

[0012] A core shaft support lifting mechanism is arranged at a position along the axial direction of the pressing mechanism walking track and used to support the other end of the core shaft;

[0013] A pressing mechanism can move along the pressing mechanism walking track and press the end surface of the sand cake along the axial direction of the core shaft.

[0014] In some optional embodiments of the present application, the pressing mechanism comprises:

[0015] A bottom plate is installed on the walking track of the pressing mechanism;

[0016] A gantry is installed on the bottom plate;

[0017] A walking reduction motor is installed on the bottom plate, and a walking gear is installed on the output shaft to cooperate with the rack on the walking track of the pressing mechanism to drive the gantry to move.

[0018] Preferably, the pressing mechanism further comprises:

[0019] A lifting reduction motor is installed on the gantry to drive the lifting shaft to rotate and drive the lifting chain to move in a cycle;

[0020] A lifting plate is installed on the lifting chain and can move up and down along the linear slide rail;

[0021] An installation plate is installed on the lifting plate and is provided with a nut seat, a linear bearing and the like;

[0022] A pressing drive hand wheel is used to drive the pressing plate to move forward or backward through a screw rod.

[0023] Further preferably, the back surface of the pressing plate is provided with a pressure sensor for real-time monitoring of the pressing force.

[0024] Preferably, the pressing mechanism further comprises:

[0025] A worm screw rod elevator is arranged on the bottom plate;

[0026] A tensioning seat is arranged at one end of the worm screw rod elevator;

[0027] A tensioning reduction motor is arranged at the other end of the worm screw rod elevator;

[0028] The tensioning reduction motor drives the worm screw rod elevator to move up and down, and the tensioning seat is tensioned with the rack surface in the walking track of the pressing mechanism to resist the reaction force caused by the adhesion of the sand cake.

[0029] In some optional embodiments of the present application, the mandrel fixing and supporting mechanism comprises:

[0030] A support frame is arranged in the middle of the walking track of the pressing mechanism;

[0031] Left and right adjusting fixing blocks are arranged on the support frame;

[0032] Jack bolts are arranged on the left and right adjusting fixing blocks to tighten the walking track of the pressing mechanism, and the distance between the support frame and the walking track of the pressing mechanism can be adjusted by adjusting the distance of the jack bolts.

[0033] Preferably, the mandrel fixing and supporting mechanism further comprises:

[0034] The lower V-shaped support seat is installed on the support frame and is used for supporting the mandrel;

[0035] The upper V-shaped pressing seat is hinged to one end of the lower V-shaped support seat through the hinge rod, and the other end is provided with a handle and a lifting eye nut.

[0036] Further preferably, the mandrel fixing and supporting mechanism further comprises a slip bolt installed on the lower V-shaped support seat and matched with the lifting eye nut to fix the upper V-shaped pressing seat.

[0037] Further preferably, the upper V-shaped pressing seat can be turned by 90 degrees around the hinge rod.

[0038] In some optional embodiments of the present application, the system further comprises a sand cake supporting sleeve arranged between the mandrel fixing and supporting mechanism and the mandrel and used for supporting the first sand cake flat end face.

[0039] In a second aspect, a horizontal splicing and pressing method for a long-specification sand core mold applied to the system in any of the first aspect is provided, and the method comprises the following steps:

[0040] One end of the mandrel is supported by the mandrel fixing and supporting mechanism, and the other end is supported by the support lifting mechanism;

[0041] A plurality of sand cakes are sequentially arranged on the mandrel in the axial direction of the mandrel;

[0042] The pressing mechanism is controlled to move to a specified position along the pressing mechanism walking track;

[0043] The end face of each sand cake on the mandrel is pressed by the pressing mechanism.

[0044] In some optional embodiments of the present application, the first sand cake is axially limited by a positioning step on the mandrel, and the last sand cake is axially pressed and limited by an axial end nut.

[0045] In some optional embodiments of the present application, adhesive glue is coated between adjacent sand cakes.

[0046] In some optional embodiments of the present application, during the pressing process, the pressing force between the sand cakes is detected by a pressure sensor.

[0047] In some optional embodiments of the present application, the method further comprises:

[0048] The tensioning seat is driven by the turbine screw rod lifter to move upward, so that the tensioning seat is tensioned with the rack face in the pressing mechanism walking track to resist the reaction force caused by the sand cake adhesion.

[0049] The present application has the following beneficial effects:

[0050] The application realizes horizontal splicing and pressing of long-specification sand core mold, avoids the limitation of traditional vertical splicing mode, improves production efficiency and operation safety, and has wide application prospect.

[0051] 1. The horizontal splicing mode is adopted, compared with vertical splicing, the height limitation of the factory building is reduced, and the sand core mold of large specification and long size can be spliced in sections;

[0052] 2. The high-altitude jack pressing in the vertical splicing is replaced by the horizontal pressing mechanism, and the sand mold is supported by the worm gear screw lifter, so that the operation safety and pressing efficiency are significantly improved;

[0053] 3. The horizontal pressing mechanism is provided with a pressure sensor, the pressing force between the sand cakes can be monitored in real time, the end face of the sand cake is prevented from being crushed due to excessive pressing force, and the splicing quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical scheme of the disclosed embodiment, the drawings of the embodiment will be briefly introduced below, and these drawings are only for the purpose of illustration, and are not intended to limit the protection scope of the application.

[0055] Figure 1 It is a schematic diagram of the pressing process of the horizontal splicing of the sand core mold;

[0056] Figure 2 It is a structural schematic diagram of the horizontal pressing equipment of the sand core mold of the application;

[0057] Figure 3 It is a structural schematic diagram of the core shaft fixed support mechanism;

[0058] Figure 4 It is a structural schematic diagram of the pressing mechanism;

[0059] Figure 5 It is an A-A sectional view of Figure 4 ;

[0060] In the figure: 1, pressing mechanism walking track; 200, core shaft fixed support mechanism; 3, sand cake support sleeve; 4, sand cake; 500, pressing mechanism; 6, core shaft; 7, support lifting mechanism; 8, shaft end nut;

[0061] The components are as follows: 201, support frame; 202, left and right adjustment fixing block; 203, tightening bolt; 204, lower V-shaped support seat; 205, hinge rod; 206, limit nut; 207, tilting angle limit plate; 208, upper V-shaped clamping seat; 209, handle; 210, lifting eye nut; 211, slip bolt; 501, tensioning seat; 502, traveling gear; 503, tensioning reduction motor; 504, lower limit; 505, linear slide rail; 506, gantry frame; 507, lifting plate; 508, upper... Limit switch; 509, fall arrestor; 510, upper lifting bearing seat; 511, lifting shaft; 512, lifting gear motor; 513, pressure plate; 514, lifting chain; 515, drag chain plate; 516, drag chain; 517, lower lifting bearing seat; 518, travel gear motor; 519, pressure drive handwheel; 520, linear bearing; 521, mounting plate; 522, pressure sensor; 523, lead screw; 524, guide shaft; 525, nut seat; 526, worm gear screw jack; 527, base plate. Detailed Implementation

[0062] The technical solutions, including preferred solutions, of the present invention will be further described in detail below with reference to the accompanying drawings and by way of listing some optional embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0063] Example 1

[0064] like Figure 1 As shown, the sand core mold includes a mandrel 6, a sand cake 4, and a shaft end nut 8. First, the mandrel 6 is horizontally supported by a mandrel fixing support mechanism 200 and a support lifting mechanism 7. One end of the mandrel 6 is fixed to the mandrel fixing support mechanism 200, and the other end is supported by several support lifting mechanisms 7, thus achieving horizontal positioning of the mandrel 6.

[0065] Next, the sand cakes 4 are sequentially threaded onto the mandrel 6. The first sand cake 4 is axially limited by the positioning step on the mandrel 6, and the flat end face of the first sand cake 4 is supported by the sand cake support sleeve 3. The remaining sand cakes 4 are then evenly coated with special adhesive on their end faces and sequentially threaded onto the mandrel 6 until the required length is reached.

[0066] like Figure 1 and Figure 2As shown, the present application provides a horizontal splicing and pressing system for long-size sand core mold, which comprises a pressing mechanism walking track 1, a core shaft fixed support mechanism 200, a core shaft support lifting mechanism 7 and a pressing mechanism 500. Among them, the core shaft fixed support mechanism 200 is arranged at the starting end of the pressing mechanism walking track 1, used to support one end of the core shaft 6; the core shaft support lifting mechanism 7 is arranged at the position of the pressing mechanism walking track 1 along the axial direction, used to support the other end of the core shaft 6; the pressing mechanism 500 can move along the pressing mechanism walking track 1, and press the end face of the sand cake 4 along the axial direction of the core shaft 6.

[0067] Specifically, as shown in Figure 4 and Figure 5 , the pressing mechanism 500 comprises a bottom plate 527, a gantry 506 and a walking reduction motor 518. The bottom plate 527 is installed on the pressing mechanism walking track 1; the gantry 506 is installed on the bottom plate 527; the walking reduction motor 518 is installed on the bottom plate 527, and the output shaft thereof is provided with a walking gear 502, which cooperates with the rack on the pressing mechanism walking track 1 to drive the gantry 506 to move.

[0068] Further, the pressing mechanism 500 further comprises a lifting reduction motor 512, a lifting plate 507, a mounting plate 521 and a pressing driving hand wheel 519. The lifting reduction motor 512 is installed on the gantry 506, drives the lifting shaft 511 to rotate, and drives the lifting chain 514 to move in a cycle; the lifting plate 507 is installed on the lifting chain 514, and can move up and down along the linear slide rail 505; the mounting plate 521 is installed on the lifting plate 507, and is provided with a nut seat 525, a linear bearing 520 and the like; the pressing driving hand wheel 519 drives the pressing plate 513 to move forward or backward through the screw rod 523.

[0069] After the sand cake 4 is completed, the pressing mechanism 500 is started. The pressing mechanism 500 can move along the pressing mechanism walking track, and the walking reduction motor 518 drives the walking gear 502 to cooperate with the rack on the pressing mechanism walking track to realize accurate positioning of the pressing mechanism 500.

[0070] The gantry 506 in the pressing mechanism 500 is installed on the bottom plate 527, and the lifting reduction motor 512 is installed on the gantry 506. The lifting reduction motor 512 drives the lifting shaft 511 to rotate, drives the lifting chain 514 to move in a cycle, and the lifting chain 514 is connected with the lifting plate 507. The lifting plate 507 can move up and down along the linear slide rail 505, adjusts the height of the pressing mechanism 500, makes the center of the pressing plate 513 align with the center of the sand cake 4 to be pressed, and adapts to sand cakes 4 of different diameters.

[0071] In this embodiment, the back of the pressing plate 513 is provided with a pressure sensor 522 for real-time monitoring of the pressing force. This design can effectively avoid the problem of crushing the end face of the sand cake 4 due to excessive pressing force.

[0072] Supporting the mandrel 6 at several points, then the sand cake 4 along Figure 1 the axis direction, to the mandrel 6 a certain section. In addition to the first sand cake 4 on the mandrel 6 of the positioning steps for axial limit, the last sand cake by the axial compression limit of the shaft end nut 8, the rest of the sand cake and the sand cake by the special adhesive, and compression such as Figure 1 sand cake compression surface, so that the sand cake and the sand cake firmly bonded, not axial string.

[0073] Example 2

[0074] Based on example 1, as Figure 4 and Figure 5 shown, the compression mechanism 500 also includes a turbine screw lift 526, a tension seat 501 and a tension reduction motor 503. The turbine screw lift 526 is arranged on the bottom plate 527; the tension seat 501 is arranged at one end of the turbine screw lift 526; the tension reduction motor 503 is arranged at the other end of the turbine screw lift 526.

[0075] When working, the tension reduction motor 503 drives the turbine screw lift 526, which drives the tension seat 501 to move up and down, and tightens the frame surface in the compression mechanism walking track 1, thereby resisting the reaction force caused by the bonding of the sand cake 4.

[0076] During the compression process, the operator rotates the compression drive hand wheel 519, which drives the screw rod 523 to rotate. The screw rod 523 cooperates with the nut seat 525 to convert the rotary motion into linear motion, which drives the compression plate 513 to move forward and applies compression force to the end face of the sand cake 4. The pressure sensor 522 monitors the size of the compression force in real time to avoid damage to the end face of the sand cake 4 due to excessive compression force.

[0077] In order to resist the reaction force caused by the bonding of the sand cake 4, the compression mechanism 500 also includes a turbine screw lift 526 installed on the bottom plate 527. One end of the turbine screw lift 526 is connected to the tension seat 501, and the other end is connected to the tension reduction motor 503. When the tension reduction motor 503 is started, it drives the turbine screw lift 526 to drive the tension seat 501 to move up and down. The tension seat 501 moves up and tightens the frame surface in the compression mechanism walking track, forming a reaction support.

[0078] Example 3

[0079] As Figure 3 shown, the mandrel fixing and supporting mechanism 200 in this embodiment is used to support one end of the mandrel 6, and its structure includes:

[0080] The support frame 201 is placed in the middle of the compression mechanism walking track;

[0081] The left and right adjusting fixed block 202 is installed on the support frame 201;

[0082] The jacking bolt 203 is installed on the left and right adjusting fixed block 202, and jacks the compression mechanism walking track. By adjusting the distance of the jacking bolt 203, the distance between the support frame 201 and the compression mechanism walking track can be adjusted, so that the mandrel fixed support mechanism 200 is centered with the support lifting mechanism 7.

[0083] The support frame 201 is arranged in the middle of the compression mechanism walking track 1; the left and right adjusting fixed block 202 is arranged on the support frame 201; and the jacking bolt 203 is arranged on the left and right adjusting fixed block 202, and is used for jacking the compression mechanism walking track 1. By adjusting the distance of the jacking bolt 203, the distance between the support frame 201 and the compression mechanism walking track 1 can be adjusted.

[0084] The mandrel fixed support mechanism 200 further comprises a lower V-shaped support seat 204 and an upper V-shaped compression seat 208. The lower V-shaped support seat 204 is installed on the support frame 201 and is used for supporting the mandrel 6; and the upper V-shaped compression seat 208 is hinged to one end of the lower V-shaped support seat 204 through a hinge rod 205, and the other end is provided with a handle 209 and a lifting ring nut 210.

[0085] In addition, the mandrel fixed support mechanism 200 further comprises a slip bolt 211 arranged on the lower V-shaped support seat 204 and matched with the lifting ring nut 210 to fix the upper V-shaped compression seat 208. The upper V-shaped compression seat 208 can be turned by 90 degrees around the hinge rod 205, which is convenient for the installation and disassembly of the mandrel 6.

[0086] The lower end of the mandrel 6 is supported on the lower V-shaped support seat 204, and the upper end is compressed and limited by the upper V-shaped compression seat 208. The upper V-shaped compression seat 208 is hinged to one end of the lower V-shaped support seat 204 through the hinge rod 205, and the other end is provided with the handle 209 and the lifting ring nut 210. The operator can turn the upper V-shaped compression seat 208 by 90 degrees around the hinge rod 205 through the handle 209, and then fix it through the lifting ring nut 210 and the slip bolt 211 installed on the lower V-shaped support seat 204, so as to realize the compression and limitation of the mandrel 6 and prevent it from moving circumferentially.

[0087] Example 4

[0088] The embodiment provides a horizontal splicing and compression method for a long-specification sand core mold, and the specific steps are as follows:

[0089] One end of the mandrel 6 is supported by the mandrel fixed support mechanism 200, and the other end is supported by the support lifting mechanism 7;

[0090] A plurality of sand cakes 4 are sequentially arranged on the mandrel 6 along the axial direction of the mandrel 6;

[0091] The compression mechanism 500 is controlled to move to a specified position along the compression mechanism walking track 1;

[0092] The end face of each sand cake 4 on the mandrel 6 is pressed by the pressing mechanism 500.

[0093] In this embodiment, the first sand cake 4 is axially limited by the positioning step on the mandrel 6, and the last sand cake 4 is axially pressed and limited by the shaft end nut 8. The adjacent sand cakes 4 are coated with adhesive glue to enhance the connection strength.

[0094] During the pressing process, the pressing force between the sand cakes 4 is detected by the pressure sensor 522 to ensure that the pressing force is within the appropriate range. At the same time, the tension seat 501 is driven upward by the turbine screw rod elevator 526 to make the tension seat 501 tensioned with the rack face in the pressing mechanism walking track 1 to resist the reaction force caused by the adhesion of the sand cakes 4.

[0095] Embodiment 5

[0096] This embodiment introduces a horizontal splicing and pressing method for long-specification sand core molds, and the specific steps are as follows:

[0097] Step 1: Fixing and supporting of the mandrel

[0098] One end of the mandrel 6 is installed on the mandrel fixing and supporting mechanism 200, and the other end is supported by a plurality of supporting and lifting mechanisms 7 to ensure the horizontal support and accurate positioning of the mandrel 6.

[0099] Step 2: Dressing and adhesion of the sand cakes

[0100] The first sand cake 4 is installed on the mandrel 6 through the sand cake supporting sleeve 3, and is axially limited by the positioning step on the mandrel 6. The remaining sand cakes 4 are sequentially dressed along the mandrel 6, and the end face of each sand cake 4 is uniformly coated with special adhesive glue to adhere to the adjacent sand cake 4.

[0101] Step 3: Adjustment and positioning of the pressing mechanism

[0102] According to the diameter and position of the sand cake 4, the height and position of the pressing mechanism 500 are adjusted. The pressing mechanism 500 is driven by the walking reduction motor 518 to move along the pressing mechanism walking track to the position of the end face of the sand cake 4 to be pressed. The lifting reduction motor 512 drives the lifting chain 514 to move to adjust the height of the pressing plate 513, so that the center thereof is aligned with the center of the sand cake 4.

[0103] Step 4: Pressing of the end face of the sand cake

[0104] The operator rotates the pressing drive hand wheel 519, and through the rotation of the screw rod 523, the pressing plate 513 is moved forward to apply appropriate pressing force to the end face of the sand cake 4. The pressure sensor 522 monitors the size of the pressing force in real time to ensure that the pressing force is moderate and the end face of the sand cake 4 is not crushed.

[0105] Step 5: Repeat the pressing operation

[0106] According to the number of sand cakes 4, repeat steps 3 and 4 to press the end face of each sand cake 4 in turn, and ensure that each sand cake 4 is firmly bonded.

[0107] Step 6: Complete the splicing of the sand core mold

[0108] After all the sand cakes 4 are spliced, the shaft end nut 8 is installed, the last section of the sand cake 4 is axially pressed and limited, and the horizontal splicing of the entire sand core mold is completed.

[0109] Step 7: Resistance to reaction force

[0110] During the pressing process, the tension reduction motor 503 is started, the turbine screw lifter 526 is driven, the tension seat 501 is moved upward, the tension seat 501 is tensioned with the rack surface in the walking track of the pressing mechanism, the reaction force caused by the bonding of the sand cake 4 is resisted, and the stability of the pressing mechanism 500 is ensured.

[0111] Through the above method, the horizontal splicing and pressing of the long-specification sand core mold is realized, the limitations of the traditional vertical splicing method are avoided, the production efficiency and operation safety are improved, and the method has a wide application prospect.

[0112] Those skilled in the art will readily understand that the above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, combination, replacement, improvement, etc. made under the spirit and principles of the present application is included in the protection scope of the present application.

Claims

1. A horizontal splice press system for long rule sand core molds, characterized by, The application relates to a sand cake pressing mechanism. The sand cake pressing mechanism comprises a pressing mechanism walking track, a mandrel fixing support mechanism (200) arranged at the starting end of the pressing mechanism walking track and used for supporting one end of a mandrel (6), a mandrel support lifting mechanism (7) arranged at the position of the pressing mechanism walking track along the axial direction and used for supporting the other end of the mandrel (6), and a pressing mechanism (500) which can move along the pressing mechanism walking track and is used for pressing the end surface of a sand cake (4) along the axial direction of the mandrel (6). The pressing mechanism (500) comprises a bottom plate (527) installed on the pressing mechanism walking track, a portal frame (506) installed on the bottom plate (527), and a walking reduction motor (518) installed on the bottom plate (527) and provided with a walking gear (502) on the output shaft, which is matched with a rack on the pressing mechanism walking track to drive the portal frame (506) to move. The pressing mechanism (500) further comprises a lifting reduction motor (512) installed on the portal frame (506) and used for driving a lifting shaft (511) to rotate and driving a lifting chain (514) to move in a cycle, a lifting plate (507) installed on the lifting chain (514) and capable of moving up and down along a linear sliding rail (505), and an installation plate (521) installed on the lifting plate (507) and provided with a nut seat (525) and a linear bearing (520). A pressing driving hand wheel (519) drives a pressing plate (513) to move forward or backward through a screw rod (523). The lifting plate (507) can move up and down along the linear sliding rail (505) to adjust the height of the pressing mechanism (500), so that the center of the pressing plate (513) is aligned with the center of a sand cake (4) to be pressed and different diameters of the sand cake (4) can be adapted. The back surface of the pressing plate (513) is provided with a pressure sensor (522) for real-time monitoring of the pressing force. The pressing mechanism (500) further comprises a turbine screw rod elevator (526) arranged on the bottom plate (527), a tensioning seat (501) arranged at one end of the turbine screw rod elevator (526), and a tensioning reduction motor (503) arranged at the other end of the turbine screw rod elevator (526). The mandrel fixing support mechanism (200) comprises a support frame (201) arranged in the middle of the pressing mechanism walking track, left and right adjusting fixed blocks (202) arranged on the support frame (201), and top pressing bolts (203) arranged on the left and right adjusting fixed blocks (202) and used for pressing the pressing mechanism walking track. The mandrel fixing support mechanism (200) further comprises a lower V-shaped support seat (204) installed on the support frame (201) and used for supporting the mandrel (6), and an upper V-shaped pressing seat (208) hinged to one end of the lower V-shaped support seat (204) through a hinge rod (205) and provided with a handle (209) and a lifting ring nut (210) at the other end. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The system of claim 1, wherein, ​ ​ ​ ​ 3. The system of claim 2, wherein, ​ ​ ​ 4. A horizontal splicing and pressing method of long-size sand core mold, applied to the system of any one of claims 1 to 3, comprising the following steps: (1) One end of the core shaft (6) is supported by the core shaft fixing support mechanism (200), and the other end is supported by the support lifting mechanism (7); (2) A plurality of sand cakes (4) are sequentially arranged on the core shaft (6) along the axial direction of the core shaft (6), and adhesive is coated between adjacent sand cakes (4); (3) The pressing mechanism (500) is moved to a specified position along the pressing mechanism walking track, the height of the pressing mechanism (500) is adjusted, and the center of the pressing plate (513) is aligned with the center of the sand cake (4); (4) The end face of each sand cake (4) on the core shaft (6) is pressed by the pressing mechanism (500), and the pressure sensor (522) monitors the pressing force in real time; Steps (3) and (4) are repeated to press the end face of each sand cake (4) in turn until all the sand cakes (4) are spliced; The shaft end nut (8) is installed to axially press and limit the last sand cake (4).

5. The method of claim 4, wherein, By adjusting the rotation angle of the pressing drive hand wheel (519), the size of the pressing force is controlled to avoid crushing the end face of the sand cake (4) due to excessive pressing force.

6. The method of claim 4, wherein, During the pressing process, the tension reduction motor (503) is started to drive the turbine screw lifter (526) to move the tension seat (501) upward and tension the rack surface in the pressing mechanism walking track to resist the reaction force caused by the adhesion of the sand cake (4).

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