Lost foam molding casting system and preparation process for inner lining panel of double-shaft horizontal stirrer

Abstract

The invention discloses a double-shaft horizontal stirrer lining plate lost foam forming casting system and a preparation process, and relates to the technical field of lost foam casting. A molding foam body is arranged in the sand box, the molding foam body is communicated with a main pouring gate and branch pouring gates, the top of the main pouring gate is provided with a riser, and the branch pouring gates are obliquely arranged on the main pouring gate and are communicated with each other; the forming foam body comprises two groups of arc-shaped plates and a connecting body, the arc-shaped plates are oppositely mounted, the connecting body is located in the middle of the two groups of arc-shaped plates, and the connecting body comprises a plurality of groups of bent plates which are mounted in pairs; positioning grooves are formed in the opposite sides of the two sets of arc-shaped plates, and wear-resisting plates are installed in the positioning grooves. Honeycomb-shaped connecting grooves are formed in the sides, opposite to the arc-shaped plates, of the wear-resisting plates, connecting columns are arranged on the arc-shaped plates, and the connecting columns are matched with the connecting grooves. The technical problem that the machining cost is too high due to the fact that an abrasion-resistant layer is arranged on the surface of an existing lining plate and external spraying and other processes need to be independently adopted is solved.

Description

Technical Field

[0001] The invention relates to the technical field of lost foam casting, in particular to a lost foam molding casting system and a preparation process for a double-shaft horizontal mixer inner liner plate. Background Art

[0002] Lost foam casting is a new casting method in which paraffin or foam models with similar size and shape to the casting are bonded together into a model cluster, coated with refractory paint and dried, buried in dry quartz sand for vibration molding, and poured under negative pressure to vaporize the model, so that liquid metal occupies the model position and forms a casting after solidification and cooling.

[0003] Lost foam casting is a new process with nearly zero allowance and precise molding. This process does not require mold removal, parting surface, or sand core, so the casting has no flash, burrs, or draft angle, and reduces the dimensional error caused by the core combination. The surface roughness of the casting can reach Ra3.2 to 12.5μm; the dimensional accuracy of the casting can reach CT7 to 9; the maximum machining allowance is 1.5 to 2mm, which can greatly reduce the cost of mechanical processing and reduce 40% to 50% of the machining time compared with the traditional sand casting method.

[0004] For the twin-shaft horizontal mixer, the stirring arm and stirring blade are installed on the twin-shaft to realize the rotary stirring, and the horizontal type is provided with the inner lining plate, which needs to have strong wear resistance to realize the effect of wear-resistant bearing concrete. The inner lining plate of the twin-shaft horizontal mixer can refer to CN202221469813.1, a high chromium alloy arc lining plate for the mixer discharge door; and the lining plate is cast by the lost foam technology as the existing method;

[0005] The inner lining plate needs to have strong wear resistance to be used in concrete mixers, and a wear-resistant layer needs to be set on the surface. The wear-resistant layer can be set by subsequent processes, such as laser coating; or alloy materials can be used to improve the material of the entire lining plate, but alloy materials will cause the cost of the lining plate to be too high.

[0006] Therefore, we provide the lost foam molding casting system and preparation process for the inner lining plate of the twin-shaft horizontal mixer. Summary of the invention

[0007] The purpose of the present invention is to make up for the shortcomings of the prior art and provide a double-shaft horizontal mixer liner plate lost foam molding casting system and preparation process, which can solve the problem of saving the wear-resistant layer bonding process to form an effective and convenient process for casting and molding the wear-resistant layer.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] A double-shaft horizontal mixer liner plate lost foam molding casting system comprises a molding sand silo, a conveyor belt is installed at the bottom of the molding sand silo, and a sand box is installed on the conveyor belt;

[0010] A molding foam body is arranged in the sand box, a main runner and a branch runner are connected to the molding foam body, a riser is arranged on the top of the main runner, and multiple groups of branch runners are arranged and obliquely installed on the main runner and are connected; the molding foam body includes an arc plate and a connector, two groups of arc plates are arranged and installed back to back, the connector is located in the middle of the two groups of arc plates, and the connector includes multiple groups of bent plates and installed in pairs;

[0011] Positioning grooves are provided on the opposite sides of the two groups of arc plates, and wear-resistant plates are installed in the positioning grooves; a honeycomb connecting groove is provided on the side of the wear-resistant plate opposite to the arc plate, and a connecting column is provided on the arc plate, and the connecting column is matched with the connecting groove.

[0012] In a further technical solution, a cylindrical material port is installed at the bottom of the molding sand material bin, an opening piece and a flaring piece are installed on the outer side of the cylindrical material port, an annular plate is installed between the opening piece and the flaring piece, the annular plate is installed with an opening piece, and a flaring piece is installed at the bottom;

[0013] The conveyor belt includes two sets of chain belts, and a clamping block is installed at the bottom of the sand box, and the clamping block is suitable for clamping on the chain belt;

[0014] A vibrating lifting member is installed at the bottom of the conveyor belt at the bottom of the cylindrical material port, and the vibrating lifting member includes a lifting hydraulic cylinder and a position plate located on both sides, and a vibrating column is installed on the position plate, and the vibrating column is suitable for being inserted into the sand box and vibrating the sand box;

[0015] Hydraulic drive rods are installed on both sides of the sand box, and displacement plates are installed at the output ends of the hydraulic drive rods. The displacement plates are located on the surface of the sand box and a support plate is installed on the top. A material storage barrel is installed on the support plate. The material storage barrel is filled with a covering agent and is provided with a discharge pipe.

[0016] In a further technical solution, the opening part includes an upper motor, an upper plate and a movable plate, the upper plate is fixedly installed in the cylindrical material port, and both the upper plate and the movable plate are provided with unloading holes, and there are multiple groups of unloading holes and they are evenly spaced; the movable plate is located at the upper part of the upper plate; one end of the movable plate extends to the outside of the cylindrical material port and is integrally provided with a support rod part, a gear 1 is installed at the output end of the upper motor, a rack is provided on the support rod part, and the gear 1 is meshed with the rack.

[0017] In a further technical solution, baffle one and baffle two are installed at the bottom of the cylindrical material port, and both baffle one and baffle two are provided in two groups and are symmetrically distributed in a rectangular shape; the two groups of baffle one are consistent with the conveying direction of the conveyor belt; baffle one is rotatably connected to the cylindrical material port, and baffle two is fixedly connected to the cylindrical material port; the length of baffle one is greater than the length of baffle two; the top height of baffle one is higher than the top height of baffle two.

[0018] In a further technical solution, the flaring member includes a fixing plate, a lifting motor is installed at the bottom of the fixing plate, and the lifting motor is a stepping motor; a transmission rod is installed at the output end of the lifting motor; the upper end of the transmission rod is rotatably connected to the output end of the lifting motor, and a hinge seat is installed at the lower end, and the hinge seat is connected to the outer wall of the baffle plate;

[0019] A slide groove is arranged on the outer side of the baffle plate 1, and a slide plate is installed in the slide groove, and the slide plate is integrally arranged with the hinge seat; the hinge seat is suitable for sliding in the slide groove;

[0020] The slide plate is provided with a convex strip outside, and a sub-groove is provided inside the slide groove, and the convex strip is matched with the sub-groove.

[0021] In a further technical solution, the fixed plate is a bent plate, and the end away from the cylindrical material opening is bent downward; a position frame is installed in the fixed plate, and a control switch is installed at one end of the position frame opposite to the cylindrical material opening, and a push rod is arranged in the control switch, and the push rod corresponds to the on and off of the control switch;

[0022] An inclined rod is installed on the transmission rod, and a hinged abutment head is installed at the end of the inclined rod. The hinged abutment head is suitable for movably abutting with a push rod of a control switch.

[0023] In a further technical solution, the hinged abutment head includes a column one, a short shaft is installed at the end of the column one, and an abutment rod is hingedly installed on the short shaft; one end of the abutment rod is bent and suitable for movably abutting with the push rod; fixing rings are installed on both the column one and the abutment rod, and a return spring is installed between them, and both ends of the return spring are installed with rings and installed in the fixing rings.

[0024] In a further technical solution, the vibration column includes a vibration motor and a positioning plate, the positioning plate is connected to the position plate, and a lower limit plate is installed on the top of the positioning plate; the body of the vibration motor is connected to the positioning plate, and the output end passes through the positioning plate and is installed with a disc, and the disc is eccentrically installed with a vibration plate, the top of the vibration plate is suitable for reciprocating up and down with the disc, and the lower limit plate limits the bottom position of the vibration plate; the vibration plate is a bent plate;

[0025] A vibration head is installed on the top of the vibration column, and the vibration plate is suitable for driving the vibration head to vibrate.

[0026] In a further technical solution, the vibration column also includes a vibration shell, which is suitable for wrapping the positioning plate, the disc and the vibration plate; and an upper limit opening is provided on the top, and the upper limit opening limits the top position of the vibration plate; the vibration head is suitable for rising and falling at the top of the vibration column.

[0027] The preparation process of the inner lining plate of the twin-shaft horizontal mixer comprises the following steps:

[0028] Step 1, prefabricate the foam body, machine-process and form two sets of arc-shaped plates and connectors that are separately arranged, and then bond the arc-shaped plates and connectors with an adhesive; and then cut a connecting column on the back side of the arc-shaped plate;

[0029] Step 2, prefabricating a wear-resistant plate, the wear-resistant plate includes the following components in weight percentage: C: 4.2-7.6%, Si≤0.8%, Mn≤2.5%, Cr: 32.4-38.5%, Ni: 9.0-11.8%, Mo≤2.4%, Zn≤1.0%, Nb≤3.2%, P≤0.06%, S≤0.06%, and the rest are iron and unavoidable impurities, wherein: 0.48≤(Si+Cr) / (Ni+Fe)≤0.85;

[0030] Step 3, opening a honeycomb connection groove on the wear-resistant plate and matching it with the connection column; installing the wear-resistant plate on the curved plate and applying a metal adhesive on four sides, wherein the metal adhesive includes a high-temperature resistant organic silica gel or epoxy AB glue; coating the surface of the molded foam with a refractory material and drying it;

[0031] Step 4: The conveyor belt drives the sand box to the sand injection position, the upper motor starts, and drives the movable plate to move, so that the discharge holes of the movable plate and the upper plate are arranged coaxially, thereby realizing the rapid passage of the pearl sand; the pearl sand is injected into the sand box;

[0032] Step 5, the lifting motor drives the transmission rod to rotate, so that the slide plate moves along the slide slot, driving the rotation of the baffle plate 1; and the synchronous lifting hydraulic cylinder drives the vibration column to insert into the bottom of the sand box, so that the sand box is separated from the conveyor belt; the vibration column starts to vibrate, driving the sand box to vibrate;

[0033] Step 6: The transmission rod rotates to drive the inclined rod on the rod body to rotate, so that the hinged head at the end of the inclined rod abuts against the control switch as it rotates. The control switch controls the direction of the upper motor and controls the reverse movement of the moving plate, so that the dislocated closed bead sand passes through; the vibrating column stops, the lifting hydraulic cylinder resets, and the sand box falls on the conveyor belt;

[0034] Step 7: The sand box is transported to the installation location along the conveyor belt; the molded foam body is placed in the sand box to complete the fixing effect;

[0035] Step 8, the sand box is transported to the sand injection position and sand is injected again; steps 4-6 are repeated, and the rotation time of the lifting motor is extended until the sand injection covers the side of the molded foam body;

[0036] Step 9, pouring molten iron from the riser until it is filled; after completion, the displacement plate is pushed from the side by the hydraulic drive rod to drive the unloading pipe on the storage barrel to be located on the riser, wherein an electric valve is installed on the storage barrel to realize quantitative discharge;

[0037] Step 10, after casting, taking out the cast, cutting the curved plate and the connector, and removing the runner part in the casting;

[0038] Step 11, firstly heat to 980°C by modulation, and then air cool to outdoor temperature; then temper twice, the first tempering temperature is 280-770°C, the time is kept for 4 hours, and air cool to outdoor temperature; the second tempering temperature is 180-340°C, the time is kept for 4 hours, and air cool to outdoor temperature;

[0039] Step 12, measure the size and carry out processing, including cutting and drilling; then hoist and perform shot blasting surface treatment, and then carry out dimensional finishing; and complete the preparation of a set of lining plates.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The present invention prepares a complete wear-resistant layer plate before casting, forms a pre-placement effect by combining the wear-resistant layer plate with the lost foam, forms an effective connection through the honeycomb connection grooves and connection columns on the wear-resistant plate, and forms an integral molding of the inner lining plate by casting. Different from the existing casting molding followed by surface laser cladding or thermal spraying, it can save process steps, and direct casting connection will strengthen the connection strength of the surface, help the connection strength of the wear-resistant plate and the wear-resistant effect of the overall inner lining plate.

[0042] This embodiment divides the cylindrical material opening into symmetrical baffle 1 and baffle 2, and realizes the effect of fast discharging by driving baffle 1 to open through the lifting member, and also realizes the effect of fast discharging, and by installing an inclined rod with abutment effect on the transmission rod, the hinged abutment head at the end of the rod abuts against the extrusion reset spring to drive the control switch to turn on when moving forward, and similarly, when moving backward, due to the reset effect of the reset spring, the abutment rod abuts against the push rod again to realize different circuit directions, which is used to control the upper motor to drive the moving direction of the movable plate, and realize the effect of convenient control.

[0043] The present invention achieves the effect of vibrating the bead sand to form a compact extruded foam body by arranging a vibrating column plugged into the bottom of the sand box. The present invention drives the gear 1 and the rack to transmit through the upper motor installed on the top, thereby realizing the movement of the moving plate on the upper plate, thereby aligning the discharge hole to discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a three-dimensional structural schematic diagram of the lost foam molding casting system of the inner liner plate of the double-shaft horizontal mixer of the present invention;

[0045] Figure 2 for Figure 1 A magnified view of part A;

[0046] Figure 3 It is a schematic cross-sectional view of the lost foam casting of the present invention;

[0047] Figure 4 is a structural diagram of a molded foam body of the present invention;

[0048] Figure 5 It is the structural diagram of the wear-resistant plate in the present invention;

[0049] Figure 6 It is a structural diagram of the curved plate in the present invention;

[0050] Figure 7 It is a top view schematic diagram of the opening member of the present invention;

[0051] Figure 8 It is a top view schematic diagram of baffle plate 1 and baffle plate 2 of the present invention;

[0052] Fig. 9 The cross-sectional view of the cylindrical feed port of the present invention is shown in FIG. Figure 1 (Baffle 1 is open relative to baffle 2);

[0053] Fig.10 The cross-sectional view of the cylindrical feed port of the present invention is shown in FIG. Figure 2 (Baffle 1 is closed relative to baffle 2);

[0054] Fig.11 for Fig.10 A magnified view of part B;

[0055] Fig.12 for Fig.10 Enlarged view of part C;

[0056] Fig.13 is a schematic diagram of baffle 1;

[0057] Fig.14 It is a cross-sectional schematic diagram of the vibration column of the present invention installed on the position plate;

[0058] Fig.15 A set of cross-sectional views of a vibration column of the present invention.

[0059] In the figure:

[0060] 1. Molding sand silo; 11. Cylindrical material port; 12. Annular plate; 13. Baffle 1; 14. Baffle 2; 15. Slide;

[0061] 2. Conveyor belt;

[0062] 3. Sand box; 31. Block; 32. Hydraulic drive rod; 33. Displacement plate; 34. Material storage barrel; 35. Material discharge pipe;

[0063] 4. Molded foam body; 41. Main runner; 42. Branch runner; 43. Curved plate; 44. Connector; 45. Positioning groove; 46. Connecting column;

[0064] 5. Wear-resistant plate; 51. Connecting groove;

[0065] 6. Opening piece; 61. Upper motor; 62. Upper plate; 63. Moving plate; 631 Support rod; 64. Discharge hole; 64. Gear 1; 65. Rack;

[0066] 7. flared member; 71. fixed plate; 72. lifting motor; 73. transmission rod; 74. slide plate; 75. hinged abutment; 76. position frame; 77. control switch; 78. inclined rod; 751. column 1; 752. short shaft; 753. abutment rod; 754. fixed ring; 755. return spring;

[0067] 8. Vibration lifting member; 81. Lifting hydraulic cylinder; 82. Position plate;

[0068] 9. Vibration column; 91. Vibration motor; 92. Positioning plate; 93. Lower limit plate; 94. Disc; 95. Vibration plate; 96. Vibration head; 97. Vibration shell. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] Example 1

[0071] See also Figure 1-6 , the present invention provides a technical solution, a double-shaft horizontal mixer liner plate lost foam molding casting system, comprising a molding sand silo 1, a conveyor belt 2 is installed at the bottom of the molding sand silo 1, and a sand box 3 is installed on the conveyor belt 2;

[0072] A molded foam body 4 is arranged in the sand box 3, and a main runner 41 and a branch runner 42 are connected to the molded foam body 4. A riser is arranged on the top of the main runner 41. Multiple groups of branch runners 42 are arranged and are obliquely installed on the main runner 41 and are connected. The molded foam body 4 includes an arc plate 43 and a connector 44. The arc plate 43 is arranged in two groups and is installed back to back. The connector 44 is located in the middle of the two groups of arc plates 43. The connector 44 includes multiple groups of bent plates and is installed in pairs.

[0073] Positioning grooves 45 are provided on the opposite sides of the two groups of arc plates 43, and wear-resistant plates 5 are installed in the positioning grooves 45; the wear-resistant plates 5 are provided with honeycomb-shaped connecting grooves 51 on the side opposite to the arc plates 43, and connecting columns 46 are provided on the arc plates 43, and the connecting columns 46 are adapted to the connecting grooves 51. The specific number of connecting grooves and connecting columns is related to the actual material and installation requirements, so as to achieve the connection strength.

[0074] A cylindrical material port 11 is installed at the bottom of the molding sand material bin 1, and an opening piece 6 and a flaring piece 7 are installed on the outer side of the cylindrical material port 11, and an annular plate 12 is installed between the opening piece 6 and the flaring piece 7, and the annular plate 12 is installed with the opening piece 6 and the flaring piece 7 at the bottom;

[0075] The conveyor belt 2 includes two sets of chain belts, and a clamping block 31 is installed at the bottom of the sand box 3, and the clamping block 31 is suitable for clamping on the chain belt;

[0076] A vibrating lifting member 8 is installed at the bottom of the conveyor belt 2 at the bottom of the cylindrical material port 11. The vibrating lifting member 8 includes a lifting hydraulic cylinder 81 and a position plate 82 located on both sides. A vibrating column 9 is installed on the position plate 82. The vibrating column 9 is suitable for being inserted into the sand box 3 and vibrating the sand box 3.

[0077] Hydraulic drive rods 32 are installed on both sides of the sand box 3, and a displacement plate 33 is installed at the output end of the hydraulic drive rod 32. The displacement plate 33 is located on the surface of the sand box 3 and a support plate is installed on the top. A storage barrel 34 is installed on the support plate. The storage barrel 34 is filled with a covering agent and a discharge pipe 35 is provided.

[0078] The present invention directly installs an arc-shaped wear-resistant plate outside the arc-shaped plate of the molded foam body, and forms an effective connection through the honeycomb connecting grooves and connecting columns on the wear-resistant plate. This is different from the existing casting and then surface laser cladding processing or thermal spraying, which both require surface processing after molding and require more processing steps and equipment.

[0079] Example 2

[0080] like Figure 1 and 7As shown, it is another embodiment of the present invention. On the basis of Example 1, the opening member 6 includes an upper motor 61, an upper plate 62 and a movable plate 63. The upper plate 62 is fixedly installed in the cylindrical material port 11, and the upper plate 62 and the movable plate 63 are both provided with discharge holes 64, and the discharge holes 64 are provided with multiple groups and are distributed at equal intervals; the movable plate 63 is located at the upper part of the upper plate 62; one end of the movable plate 63 extends to the outside of the cylindrical material port 11 and is integrally provided with a support rod 631, and a gear 1 64 is installed at the output end of the upper motor 61, and a rack 65 is provided on the support rod 631, and the gear 1 64 is meshed with the rack 65. In this embodiment, the upper motor installed at the top drives the gear 1 and the rack to transmit, thereby realizing the movement of the movable plate on the upper plate, thereby realizing the alignment of the discharge holes for discharge.

[0081] Example 3

[0082] like Figure 1-13 As shown, it is another embodiment of the present invention. On the basis of Example 1, baffle 13 and baffle 2 14 are installed at the bottom of the cylindrical material port 11, and the baffle 13 and baffle 2 14 are provided in two groups and are symmetrically distributed in a rectangular shape; the two groups of baffles 13 are consistent with the conveying direction of the conveyor belt 2; the baffle 13 is rotatably connected to the cylindrical material port 11, and the baffle 2 14 is fixedly connected to the cylindrical material port 11; the length of the baffle 13 is greater than the length of the baffle 2 14; the top height of the baffle 13 is higher than the top height of the baffle 2 14.

[0083] The flaring member 7 includes a fixed plate 71, a lifting motor 72 is installed at the bottom of the fixed plate 71, and the lifting motor 72 is a stepping motor; a transmission rod 73 is installed at the output end of the lifting motor 72; the upper end of the transmission rod 73 is rotatably connected to the output end of the lifting motor 72, and a hinge seat is installed at the lower end, and the hinge seat is connected to the outer wall of the baffle 13; the present invention realizes the rapid unloading of the gem sand by driving the operation of the baffle through the flaring member, and controls the opening and closing of the unloading through position limitation.

[0084] The outer side of the baffle 13 is provided with a slide groove 15, and a slide plate 74 is installed in the slide groove 15, and the slide plate 74 is integrally provided with the hinge seat; the hinge seat is suitable for sliding in the slide groove 15; a convex strip is provided on the outside of the slide plate 74, and a sub-groove is provided in the slide groove 15, and the convex strip is adapted to the sub-groove. The fixed plate 71 is a bent plate, and the end away from the cylindrical material opening 11 is bent downward; a position frame 76 is installed in the fixed plate 71, and a control switch 77 is installed at the end of the position frame 76 opposite to the cylindrical material opening 11, and a push rod is provided in the control switch 77, and the push rod corresponds to the on and off of the control switch 77;

[0085] An inclined rod 78 is mounted on the transmission rod 73 , and a hinged abutment 75 is mounted on the end of the inclined rod 78 . The hinged abutment 75 is suitable for movably abutting against a push rod of a control switch 77 .

[0086] like Fig.12 As shown, the hinged abutment 75 includes a column 1 751, a short shaft 752 is installed at the end of the column 1 751, and an abutment rod 753 is hingedly installed on the short shaft 752; one end of the abutment rod 753 is bent and suitable for movably abutting with the push rod; a fixing ring 754 is installed on both the column 1 751 and the abutment rod 753, and a reset spring 755 is installed between them, and collars are installed at both ends of the reset spring 755 and installed in the fixing ring 754. This embodiment divides the cylindrical material opening into symmetrical baffle 1 and baffle 2, and realizes that the baffle 1 is driven to open by the lifting member, thereby overcoming the problem of material blocking caused by the fixed discharge cross section. The hinged abutment of the present invention can achieve the effect of reciprocatingly driving the control switch, wherein the control switch is a roller-type travel switch, and different circuit directions are formed by pressing the push rod.

[0087] In this embodiment, an inclined rod with abutment effect is installed on the transmission rod, and the hinged abutment head at the end of the abutment head abuts and squeezes the return spring to drive the control switch to turn on when moving forward. Similarly, when moving backward, due to the return effect of the return spring, the abutment rod abuts on the push rod again to achieve different circuit directions. It is mainly used to conveniently control the steering of the upper motor. In this embodiment, it is necessary to control the rotation speed of the lifting motor. By setting the lifting motor to a stepper motor and controlling the actual operation or voltage and current through an external control circuit, the operation time or speed of the lifting motor is adjusted to complete the two unloading conditions of a single set of lost foam casting. The operation time of the stepper motor set for the bottom sand of the sand box is shorter, while the operation time is longer for the filling of the gem sand after the installation of the molded foam body.

[0088] Example 4

[0089] like Figure 1-15As shown, it is another implementation scheme of the present invention. On the basis of Example 3, the vibration column 9 includes a vibration motor 91 and a positioning plate 92, the positioning plate 92 is connected to the position plate 82, and a lower limit plate 93 is installed on the top of the positioning plate 92; the body of the vibration motor 91 is connected to the positioning plate 92, and the output end passes through the positioning plate 92 and is installed with a disk 94, and the disk 94 is eccentrically installed with a vibration plate 95, the top of the vibration plate 95 is suitable for reciprocating up and down with the disk 94, and the lower limit plate 93 limits the bottom position of the vibration plate 95; the vibration plate 95 is a bent plate; a vibration head 96 is installed on the top of the vibration column 9, and the vibration plate 95 is suitable for driving the vibration head 96 to vibrate. In a further technical solution, the vibration column 9 further includes a vibration shell 97, which is suitable for wrapping the positioning plate 92, the disc 94 and the vibration plate 95; and an upper limit opening is installed inside, and the upper limit opening limits the top position of the vibration plate 95; a vibration head 96 is installed on the top of the upper limit opening, and the vibration head 96 is suitable for retracting at the top of the vibration column 9. This embodiment achieves the effect of vibrating the pearl sand to form a compact extruded foam by setting a vibration column plugged into the bottom of the sand box.

[0090] The preparation process of the inner lining plate of the twin-shaft horizontal mixer comprises the following steps:

[0091] Step 1, prefabricate the foam body 4, machine tool process and form two sets of arc plates 43 and connectors 44 which are separately arranged, and then bond the arc plates 43 and connectors 44 by adhesive; and then cut the connecting column 46 on the back side of the arc plates 43;

[0092] Step 2, prefabricate the wear-resistant plate 5, the wear-resistant plate 5 includes the following components in weight percentage: C: 4.2-7.6%, Si≤0.8%, Mn≤2.5%, Cr: 32.4-38.5%, Ni: 9.0-11.8%, Mo≤2.4%, Zn≤1.0%, Nb≤3.2%, P≤0.06%, S≤0.06%, the rest are iron and inevitable impurities, among which: 0.48≤(Si+Cr) / (Ni+Fe)≤0.85; wherein, setting 0.48≤(Si+Cr) / (Ni+Fe)≤0.85 emphasizes that Cr and Si are both oxygen-absorbing elements, which will reduce the proportion of nickel oxide, reduce pores, and ensure the strength and hardness of the alloy. The addition of an appropriate amount of Si helps to increase the fluidity of the heat-resistant alloy and acts as a deoxidizer, reducing the tendency of nickel elements to easily form nickel oxide with oxygen elements at high temperatures, and easily generating pores during crystallization, so as to avoid a large number of pores remaining, which may cause the connection parts to fall off easily; wherein, Si, Zn, and Cr are all oxygen-absorbing elements, and Si easily generates compounds such as silicates, which affect the performance of the alloy; Zn easily absorbs oxygen and hydrogen during the alloy preparation process, forming an oxide layer. The grains in the high-temperature alloy are easy to grow under high temperature conditions, resulting in unstable grain boundaries, easy formation of pores and cracks, and thus reducing the mechanical properties of the material. The addition of zinc elements can combine with impurity elements at the grain boundaries to form stable compounds, thereby inhibiting the growth of grains and stabilizing the grain boundary structure. The stability of this microstructure helps to improve the mechanical properties and heat resistance of the alloy. Cr can also react with oxygen in the alloy to form an oxide protective film, thereby enhancing the corrosion resistance of the alloy. In actual operation, it is possible to consider reducing the oxygen content by introducing nitrogen. Therefore, it is necessary to control the proportion of oxygen-absorbing elements in the heat-resistant alloy, and too high a content will lead to performance degradation. In high-temperature alloys, Nb can form various precipitation phases, which hinder the movement of dislocations in the alloy, thereby improving the strength and creep strength of the alloy. It can also refine the grains and improve the mechanical properties of the alloy.

[0093] Step 3, opening a honeycomb connection groove 51 on the wear-resistant plate 5 and matching it with the connection column 46; installing the wear-resistant plate 5 on the curved plate 43, and applying a metal adhesive on four sides, the metal adhesive including high-temperature resistant organic silica gel or epoxy AB glue; coating the surface of the molded foam body 4 with a refractory material, and drying it;

[0094] Step 4, the conveyor belt 2 drives the sand box 3 to the sand injection position, the upper motor 61 is started, and the movable plate 63 is driven to move, so that the unloading hole 64 of the movable plate 63 and the upper plate 62 are arranged coaxially, thereby realizing the rapid passage of the pearl sand; the pearl sand is injected into the sand box 3;

[0095] Step 5, the lifting motor 72 is driven to drive the transmission rod 73 to rotate, so that the slide plate 74 moves along the slide slot 15, driving the rotation of the baffle 13; and the synchronous lifting hydraulic cylinder 81 is driven to drive the vibration column 9 to insert into the bottom of the sand box 3, so that the sand box 3 is separated from the conveyor belt 2; the vibration column 9 starts to vibrate, driving the sand box 3 to vibrate;

[0096] Step 6, the transmission rod 73 rotates to drive the inclined rod 78 on the rod body to rotate, so that the hinged head 75 at the end of the inclined rod 78 abuts against the control switch 77 as it rotates, and the control switch 77 controls the upper motor 61 to turn, and controls the moving plate 63 to move in the opposite direction, so that the dislocated closed gem sand passes; the vibration column 9 stops, the lifting hydraulic cylinder 81 resets, and the sand box 3 falls on the conveyor belt 2;

[0097] Step 7, the sand box 3 is transported to the installation position along the conveyor belt 2; the molded foam body 4 is placed in the sand box 3 to complete the fixing effect;

[0098] Step 8, the sand box 3 is transported to the sand injection position and sand is injected again; steps 4-6 are repeated, and the rotation time of the lifting motor 72 is extended until the sand injection covers the side of the molded foam body 4;

[0099] Step 9, pouring molten iron from the riser until it is filled; after completion, the displacement plate 33 is pushed from the side by the hydraulic drive rod 32, driving the unloading pipe 35 on the storage barrel 34 to be located on the riser, wherein the storage barrel 34 is equipped with an electric valve to realize quantitative discharge;

[0100] Step 10, after casting, take out the cast, cut the arc plate 43 and the connector 44, and remove the runner part in the casting;

[0101] Step 11, firstly heat to 980°C by modulation, and then air cool to outdoor temperature; then temper twice, the first tempering temperature is 280-770°C, the time is kept for 4 hours, and air cool to outdoor temperature; the second tempering temperature is 180-340°C, the time is kept for 4 hours, and air cool to outdoor temperature;

[0102] Step 12, measure the size and process it, including cutting and drilling; then hoist it for shot blasting surface treatment, and then perform dimensional finishing; and complete the preparation of a set of lining plates. The processed arc plate can be cut into multiple lining plates, and then punched and installed in a double-shaft horizontal mixer. The method of the present invention does not require independent wear-resistant layer treatment, and can form a more convenient and fast wear-resistant setting.

[0103] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0104] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. The double-shaft horizontal mixer liner plate lost foam molding casting system includes a molding sand silo, a conveyor belt is installed at the bottom of the molding sand silo, and a sand box is installed on the conveyor belt; Features: A molding foam body is arranged in the sand box, a main runner and a branch runner are connected to the molding foam body, a riser is arranged on the top of the main runner, and multiple groups of branch runners are arranged and obliquely installed on the main runner and are connected; the molding foam body includes an arc plate and a connector, two groups of arc plates are arranged and installed back to back, the connector is located in the middle of the two groups of arc plates, and the connector includes multiple groups of bent plates and installed in pairs; Positioning grooves are provided on the opposite sides of the two groups of arc plates, and wear-resistant plates are installed in the positioning grooves; a honeycomb connecting groove is provided on the side of the wear-resistant plate opposite to the arc plate, and a connecting column is provided on the arc plate, and the connecting column is matched with the connecting groove.

2. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 1 is characterized in that: A cylindrical material port is installed at the bottom of the molding sand material bin, an opening piece and a flaring piece are installed on the outer side of the cylindrical material port, a fixed ring plate is installed between the opening piece and the flaring piece, the opening piece is installed on the fixed ring plate, and the flaring piece is installed at the bottom; The transmission belt includes two sets of chain belts, and a clamping block is installed at the bottom of the sand box, and the clamping block is suitable for clamping on the chain belt; A vibrating lifting member is installed at the bottom of the transmission belt at the bottom of the cylindrical material port, and the vibrating lifting member includes a lifting hydraulic cylinder and a position plate located on both sides, and a vibrating column is installed on the position plate, and the vibrating column is suitable for being inserted into the sand box and vibrating the sand box; Hydraulic drive rods are installed on both sides of the sand box, and displacement plates are installed at the output ends of the hydraulic drive rods. The displacement plates are located on the surface of the sand box and a support plate is installed on the top. A material storage barrel is installed on the support plate. The material storage barrel is filled with a covering agent and is provided with a discharge pipe.

3. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 1 is characterized in that: The opening part includes an upper motor, an upper plate and a movable plate, the upper plate is fixedly installed in the cylindrical material port, and both the upper plate and the movable plate are provided with discharge holes, and the discharge holes are arranged in multiple groups and distributed at equal intervals; the movable plate is located at the upper part of the upper plate; one end of the movable plate extends to the outside of the cylindrical material port and is integrally provided with a support rod part, a gear 1 is installed at the output end of the upper motor, a rack is provided on the support rod part, and the gear 1 is meshed with the rack.

4. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 1 is characterized in that: Baffle 1 and baffle 2 are installed at the bottom of the cylindrical material port, and both baffle 1 and baffle 2 are provided with two groups and are symmetrically distributed in a rectangular shape; the two groups of baffle 1 are consistent with the conveying direction of the conveyor belt; baffle 1 is rotatably connected to the cylindrical material port, and baffle 2 is fixedly connected to the cylindrical material port; the length of baffle 1 is greater than the length of baffle 2; the top height of baffle 1 is higher than the top height of baffle 2.

5. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 1 is characterized in that: The expansion member includes a fixed plate, a lifting motor is installed at the bottom of the fixed plate, and the lifting motor is a stepping motor; a transmission rod is installed at the output end of the lifting motor; the upper end of the transmission rod is rotatably connected to the output end of the lifting motor, and a hinge seat is installed at the lower end, and the hinge seat is connected to the outer wall of the baffle plate; A slide groove is arranged on the outer side of the baffle plate 1, and a slide plate is installed in the slide groove, and the slide plate is integrally arranged with the hinge seat; the hinge seat is suitable for sliding in the slide groove; The slide plate is provided with a convex strip outside, and a sub-groove is provided inside the slide groove, and the convex strip is matched with the sub-groove.

6. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 1 is characterized in that: The fixed plate is a bent plate, and the end away from the cylindrical material opening is bent downward; a position frame is installed in the fixed plate, and a control switch is installed at one end of the position frame opposite to the cylindrical material opening, and the control switch includes a push rod, and the push rod corresponds to the on and off of the control switch; An inclined rod is installed on the transmission rod, and a hinged abutment head is installed at the end of the inclined rod. The hinged abutment head is suitable for movably abutting with a push rod of a control switch.

7. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 6 is characterized in that: The hinged abutment head includes a column body 1, a short shaft is installed at the end of the column body 1, and an abutment rod is hingedly installed on the short shaft; one end of the abutment rod is bent and suitable for movably abutting with the push rod; fixing rings are installed on the column body 1 and the abutment rod, and a return spring is installed between them, and both ends of the return spring are installed with rings and installed in the fixing ring.

8. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 6 is characterized in that: The vibration column includes a vibration motor and a positioning plate, the positioning plate is connected to the position plate, and a lower limit plate is installed on the top of the positioning plate; the body of the vibration motor is connected to the positioning plate, and the output end passes through the positioning plate and is installed with a disc, and the disc is eccentrically installed with a vibration plate, the top of the vibration plate is suitable for reciprocating up and down with the disc, and the lower limit plate limits the bottom position of the vibration plate; the vibration plate is a bent plate; A vibration head is installed on the top of the vibration column, and the vibration plate is suitable for driving the vibration head to vibrate.

9. The lost foam molding casting system for the inner liner of a double-shaft horizontal mixer according to claim 6, characterized in that: The vibration column also includes a vibration shell, which is suitable for wrapping the positioning plate, the disc and the vibration plate; and an upper limit opening is provided on the top, which limits the top position of the vibration head; A vibrating head is mounted on the top of the upper limit plate, and the vibrating head is suitable for moving on the top of the vibrating column.

10. A process for preparing a lining plate of a twin-shaft horizontal mixer, characterized in that: The following steps are involved: Step 1, prefabricate the foam body, machine-process and form two sets of arc-shaped plates and connectors that are separately arranged, and then bond the arc-shaped plates and connectors with an adhesive; and then cut a connecting column on the back side of the arc-shaped plate; Step 2, prefabricating a wear-resistant plate, the wear-resistant plate includes the following components in weight percentage: C: 4.2-7.6%, Si≤0.8%, Mn≤2.5%, Cr: 32.4-38.5%, Ni: 9.0-11.8%, Mo≤2.4%, Zn≤1.0%, Nb≤3.2%, P≤0.06%, S≤0.06%, and the rest are iron and unavoidable impurities, wherein: 0.48≤(Si+Cr) / (Ni+Fe)≤0.85; Step 3, opening a honeycomb connection groove on the wear-resistant plate and matching it with the connection column; installing the wear-resistant plate on the curved plate and applying a metal adhesive on four sides, wherein the metal adhesive includes a high-temperature resistant organic silica gel or epoxy AB glue; coating the surface of the molded foam with a refractory material and drying it; Step 4: The transmission belt drives the sand box to the sand injection position, the upper motor starts, and drives the movable plate to move, so that the discharge holes of the movable plate and the upper plate are arranged coaxially, thereby realizing the rapid passage of the pearl sand; the pearl sand is injected into the sand box; Step 5, the lifting motor drives the transmission rod to rotate, so that the slide plate moves along the slide slot, driving the rotation of the baffle plate 1; and the synchronous lifting hydraulic cylinder drives the vibration column to insert into the bottom of the sand box, so that the sand box is separated from the conveyor belt; the vibration column starts to vibrate, driving the sand box to vibrate; Step 6: The transmission rod rotates to drive the inclined rod on the rod body to rotate, so that the hinged head at the end of the inclined rod abuts against the control switch as it rotates. The control switch controls the direction of the upper motor and controls the reverse movement of the moving plate, so that the dislocated closed bead sand passes through; the vibrating column stops, the lifting hydraulic cylinder resets, and the sand box falls on the conveyor belt; Step 7: The sand box is transported to the installation location along the conveyor belt; the molded foam body is placed in the sand box to complete the fixing effect; Step 8, the sand box is transported to the sand injection position and sand is injected again; steps 4-6 are repeated, and the rotation time of the lifting motor is extended until the sand injection covers the side of the molded foam body; Step 9, pouring molten iron from the riser until it is filled; after completion, the displacement plate is pushed from the side by the hydraulic drive rod to drive the unloading pipe on the storage barrel to be located on the riser, wherein an electric valve is installed on the storage barrel to realize quantitative discharge; Step 10, after casting, taking out the cast, cutting the curved plate and the connector, and removing the runner part in the casting; Step 11, firstly heat to 980°C by modulation, and then air cool to outdoor temperature; then temper twice, the first tempering temperature is 280-770°C, the time is kept for 4 hours, and air cool to outdoor temperature; the second tempering temperature is 180-340°C, the time is kept for 4 hours, and air cool to outdoor temperature; Step 12, measure the size and carry out processing, including cutting and drilling; then hoist and perform shot blasting surface treatment, and then carry out dimensional finishing; and complete the preparation of a set of lining plates.

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