A mold-removing tool and method for resin sand molding casting production

Abstract

The present invention relates to the field of tooling technology, and in particular to a mold-eliminating tooling and method for resin sand molding casting production. The mold-eliminating tooling includes a mold-eliminating assembly, and the mold-eliminating assembly includes a hydraulic push rod, a first push plate, a second push plate, a coil spring, a mold-eliminating rod, a folding plate and an injection assembly. The other end of the hydraulic push rod is fixedly installed with the first push plate, and the mold-eliminating rod of the molding assembly is slidably connected to the mold. The end of the mold-eliminating rod is fixedly installed with the second push plate, and the coil spring is elastically connected between the first push plate and the second push plate. When the resin sand of the present invention adheres to the inner oscillation mold, the first push plate uses the coil spring to push the second push plate so that the coil spring is compressed to avoid forcibly pushing the resin sand and causing the resin sand to be incomplete. The first push plate and the second push plate clamp the folding plate, and the folding plate is pushed upward. The folding plate uses a linkage frame to squeeze the syringe to squeeze the release agent into the inner oscillation mold to facilitate the resin sand demolding.

Description

Technical Field

[0001] The invention relates to the technical field of tooling, and in particular to a mold-eliminating tooling and method for resin sand molding casting production. Background Art

[0002] Resin sand is mainly composed of raw sand, resin and curing agent. The raw sand is generally quartz sand, which provides the basic skeleton structure of the sand mold. The resin acts as a binder to bond the sand particles together. Its types include furan resin, phenolic resin, etc. The curing agent is used to promote the curing reaction of the resin, so that the resin sand is transformed from a loose state to a sand mold with a certain strength. Demolding is a key link in resin sand casting. If the demolding is not smooth, it will cause damage to the sand mold and affect the shape and dimensional accuracy of the casting.

[0003] The patent document with publication number CN116135369A discloses a mold demolding tool and method for resin sand molding casting production. According to the shape and size of the mold block, the mold demolding device of suitable size is pre-embedded in the corresponding position of the block. When demolding, the mold block can be easily separated from the sand mold by turning the handle, thereby solving the technical problems existing in the existing knocking-type demolding method.

[0004] However, due to the presence of resin in the resin sand, there is bonding force between the sand particles. When demolding, this high-strength bonding will cause the sand mold to be tightly adsorbed on the model, resulting in adhesion. When demolding, excessive demolding force will cause damage to the resin sand mold or deformation of the model. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the background technology that resin sand is directly demolded after adhesion, which leads to damage of resin sand mold, and to provide a mold demolding tool and method for resin sand molding casting production.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] The first aspect of the present invention is to provide a resin sand molding casting production mold stripping tool, comprising a casting support, a resin filling pipe is fixedly installed at the center of the side of the casting support, and a connecting plate is fixedly installed between the casting support and the resin filling pipe;

[0008] A molding assembly, comprising an outer supporting mold and an inner oscillating mold, wherein the inner oscillating mold is fixedly mounted inside the outer supporting mold, and a side portion of the outer supporting mold is fixedly connected to a resin filling tube;

[0009] The die-pulling assembly comprises a hydraulic push rod, a first push plate, a second push plate, a coil spring, a die-pulling rod, a folding plate and an injection assembly, wherein the hydraulic push rod comprises a first end and a second end, the first end is fixedly mounted with a first push plate, the interior of the molding assembly is slidably connected to the die-pulling rod for die-pulling, one end of the die-pulling rod is fixedly mounted with a second push plate, the first push plate and the second push plate are elastically connected with a coil spring, the first push plate and the second push plate are both rotatably connected to the folding plate on the sides facing each other, and the injection assembly is arranged on the top of the folding plate;

[0010] The second end of the hydraulic push rod is fixedly connected to the casting support, the end of the injection assembly is communicated with the inner oscillation mold, and the other end of the ejector rod is in contact with the resin sand inside the inner oscillation mold.

[0011] Optionally, a guide telescopic rod is fixedly installed between the first push plate and the second push plate, and the guide telescopic rod passes through the center of the coil spring. The folding plate adopts a V-shaped hinge structure, and two mold-lifting assemblies are provided, and the two mold-lifting assemblies are centrally symmetrical about the resin filling tube.

[0012] Optionally, when there is no resin adhered inside the molding component, the ejector rod slides along the molding component; when there is resin sand adhered inside the molding component, the ejector rod remains stationary, and the first push plate and the second push plate compress the coil spring and fold the folding plate.

[0013] Optionally, the injection assembly includes a buffer telescopic rod, a syringe, a guide rod and an injection tube. The buffer telescopic rod is installed on the top of the folding plate, the syringe is fixedly installed on the top of the buffer telescopic rod, the injection tube is fixedly installed on the end of the syringe, the injection tube extends to the interior of the inner oscillation mold, and the syringe is fixedly installed on the connecting plate.

[0014] Optionally, an extension shaft is fixedly installed at the folding axis of the folding plate, a linkage frame is fixedly installed at the bottom of the buffer telescopic rod, the outside of the extension shaft is slidably connected to the linkage frame, the top of the guide rod is fixedly connected to the syringe, the linkage frame slides up and down along the guide rod, and the extension shaft and the linkage frame are staggered.

[0015] Optionally, an oscillation diffuser assembly is provided at the top of the outer support mold and inside the injection pipe, and the oscillation diffuser assembly includes a turbine fan, a connecting shaft, a rotary block, a sliding track and an impact block, and the two ends of the connecting shaft are respectively arranged on the inner and outer sides of the injection pipe, one end of the connecting shaft is fixedly installed with the turbine fan, and the other end of the connecting shaft is fixedly installed with the rotary block, and a sliding track is provided on the arc surface of the rotary block, and the impact block slides along the sliding track.

[0016] Optionally, the impact block is connected to a side of the rotating block for rotation, and the ball slides in a sliding track. The sliding track adopts an annular wavy structure. The impact block slides up and down inside the outer support mold, and the bottom of the impact block extends to the outer wall of the inner oscillation mold.

[0017] Optionally, an oscillation cavity is formed between the inner oscillation mold and the outer support mold, and the impact block slides up and down in the oscillation cavity. Two impact blocks are provided, and the two impact blocks are respectively located at the upper and lower sides of the inner oscillation mold.

[0018] Optionally, a plurality of release agent injection ports are provided inside the inner oscillation mold, and the plurality of release agent injection ports are equidistantly distributed in a straight line along the inner oscillation mold, and the release agent injection ports are connected to an injection pipe.

[0019] Another aspect of the present invention is to provide a resin sand molding casting production demolding method using the above-mentioned resin sand molding casting production demolding tool, the steps are as follows:

[0020] S1. Pushing and demolding: The hydraulic push rod is extended to move the first push plate, the coil spring and the second push plate, so that the demolding rod slides into the inner oscillation mold, and the resin sand inside the inner oscillation mold is pushed out, and the demolding is completed;

[0021] S2, adhesion slow push: when the resin sand adheres to the inner oscillation mold, there is friction between the resin sand and the inner oscillation mold. At this time, the first push plate uses the spiral spring to push the second push plate, so that the spiral spring is compressed to avoid forcibly pushing the resin sand and causing the resin sand to be incomplete;

[0022] S3, filling the mold release agent: when the resin sand adheres to the casting support, the first push plate moves and cannot use the spiral spring to push the second push plate, the distance between the first push plate and the second push plate is reduced, the first push plate and the second push plate clamp the folding plate, the folding plate is pushed up, and the folding plate uses the linkage frame to squeeze the syringe to squeeze the mold release agent into the inner oscillation mold;

[0023] S4, auxiliary demolding: the demolding agent in the syringe enters the inner oscillation mold through the injection tube, and the demolding agent drives the turbine fan to rotate, so that the rotating block rotates, thereby causing the ball and the impact block to move up and down. The impact block impacts and vibrates the inner oscillation mold, which assists demolding on the one hand, and accelerates the penetration speed of the demolding agent under the action of vibration on the other hand;

[0024] S5. Contact surface expansion: Through the structure of multiple release agent injection ports, the contact area between the resin sand inside the inner oscillation mold and the release agent is increased to accelerate the reaction of the release agent and accelerate demolding. Since there is a distance between the inner oscillation mold and the oscillation cavity, the inner oscillation mold can vibrate.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] When the resin sand of the present invention adheres to the inner oscillation mold, the first push plate pushes the second push plate by means of the coil spring so that the coil spring is compressed, thereby avoiding forced pushing of the resin sand to cause incomplete resin sand, and the first push plate moves while the second push plate does not move, so that the first push plate and the second push plate clamp the folding plate, the folding plate pushes upward, and the folding plate uses the linkage frame to squeeze the syringe to squeeze the release agent into the inner oscillation mold, so as to facilitate demolding of the resin sand and avoid forced demolding to cause incomplete resin sand;

[0027] When the resin sand can be pushed, the second push plate and the ejector rod move, the folding plate is no longer clamped by the first push plate and the second push plate, and the release agent is no longer injected into the inner oscillation mold, so as to control the injection amount of the release agent and avoid waste; even if there is no resin sand adhering to the inner oscillation mold, there is still friction between the resin sand and the inner oscillation mold, and when the folding plate is pushed upward, the buffer telescopic rod is first fully retracted, and the syringe is not subjected to thrust during this process, so as to avoid wasting the release agent in the syringe;

[0028] When the release agent is injected into the inner oscillation mold, the flow of the release agent causes the turbine fan to rotate, so that the rotating block rotates and the ball and the impact block move up and down. The impact block impacts and vibrates the inner oscillation mold, which not only assists demolding, but also accelerates the penetration speed of the release agent under the action of vibration.

[0029] Through the structure of multiple release agent injection ports, the contact area between the resin sand inside the inner oscillation mold and the release agent is increased to accelerate the reaction of the release agent and speed up demolding. Since there is a distance between the inner oscillation mold and the oscillation cavity, the inner oscillation mold can vibrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the mold-pulling tooling for resin sand molding casting production of the present invention;

[0031] Figure 2 A schematic diagram of the structure of a resin filling tube of a mold-pulling tooling for resin sand casting production according to the present invention;

[0032] Figure 3 for Figure 2 An enlarged schematic diagram of the impact block structure of part A;

[0033] Figure 4 A schematic diagram of the folding plate structure of the mold-pulling tooling for resin sand casting production of the present invention;

[0034] Figure 5 for Figure 4 An enlarged schematic diagram of the linkage frame structure of part B;

[0035] Figure 6 A schematic diagram of the structure of a syringe for producing a mold stripping tool for resin sand molding casting of the present invention;

[0036] Figure 7 It is a right side cross-sectional schematic diagram of the injection pipe structure of the mold stripping tooling for resin sand molding casting of the present invention;

[0037] Figure 8 The present invention is a schematic diagram of the structure of the release agent injection port of the mold stripping tooling for resin sand molding casting.

[0038] Figure numerals: 1. casting support; 2. resin filling tube; 3. molding assembly; 31. outer support mold; 32. inner oscillation mold; 33. release agent injection port; 34. oscillation cavity; 4. demolding assembly; 41. hydraulic push rod; 42. first push plate; 43. guide telescopic rod; 44. second push plate; 45. coil spring; 46. demolding rod; 47. folding plate; 48. extension shaft; 49. linkage frame; 410. buffer telescopic rod; 411. syringe; 412. guide rod; 413. injection tube; 5. oscillation diffusion assembly; 51. turbofan; 52. connecting shaft; 53. rotary block; 54. sliding track; 55. ball; 56. impact block. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0040] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0041] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The present invention provides a mold-cutting tool for resin sand casting production, such as Figure 1 and Figure 8 As shown, it includes a casting support 1, a resin filling tube 2 is fixedly installed at the center of the side of the casting support 1, and a connecting plate is fixedly installed between the casting support 1 and the resin filling tube 2. A molding assembly 3 is arranged at the end of the resin filling tube 2, and the molding assembly 3 includes an outer supporting mold 31 and an inner oscillating mold 32. The inner oscillating mold 32 is fixedly installed inside the outer supporting mold 31, and the side of the outer supporting mold 31 is fixedly connected to the resin filling tube 2. The resin sand raw material is added into the inner oscillating mold 32 through the resin filling tube 2 to form a shape.

[0045] like Figure 2 and Figure 4 As shown, a demolding assembly 4 is arranged between the casting support 1 and the outer support mold 31, and the demolding assembly 4 includes a hydraulic push rod 41, a first push plate 42, a second push plate 44, a coil spring 45, a demolding rod 46, a folding plate 47 and an injection assembly. The end of the hydraulic push rod 41 is fixedly connected to the casting support 1, and the other end of the hydraulic push rod 41 is fixedly installed with the first push plate 42. The internal sliding connection of the molding assembly 3 is the demolding ejection rod 46, and the end of the demolding rod 46 is fixedly installed with the second push plate 44. The coil spring 45 is elastically connected between the first push plate 42 and the second push plate 44, and the end of the demolding rod 46 is in contact with the resin sand inside the inner oscillation mold 32.

[0046] The hydraulic push rod 41 is extended to move the first push plate 42, the coil spring 45 and the second push plate 44, thereby moving the ejector rod 46. After the resin sand molding casting is completed, when there is no resin adhering to the inner oscillation mold 32, the ejector rod 46 slides along the molding component 3, and the resin sand is pushed out of the inner oscillation mold 32 through the ejector rod 46; when the resin sand adheres to the inner oscillation mold 32, the ejector rod 46 cannot push the resin sand, and the first push plate 42 and the second push plate 44 compress the coil spring 45.

[0047] A guide telescopic rod 43 passing through the center of the coil spring 45 is fixedly installed between the first push plate 42 and the second push plate 44. The first push plate 42 and the second push plate 44 are both rotatably connected to a folding plate 47 on the opposite side. An injection assembly is arranged on the top of the folding plate 47. The folding plate 47 adopts a V-shaped hinge structure. Two mold-eliminating assemblies 4 are arranged and are symmetrical about the center of the resin filling tube 2.

[0048] After the first push plate 42 and the second push plate 44 compress the coil spring 45 , the first push plate 42 and the second push plate 44 fold the folding plate 47 , the top end of the folding plate 47 moves upward, and the folding plate 47 pushes the injection assembly.

[0049] like Figure 5 As shown, the injection assembly includes a buffer telescopic rod 410, a syringe 411, a guide rod 412 and an injection tube 413. The buffer telescopic rod 410 is installed on the top of the folding plate 47, the syringe 411 is fixedly installed on the top of the buffer telescopic rod 410, the injection tube 413 is fixedly installed on the end of the syringe 411, the injection tube 413 extends to the interior of the inner oscillation mold 32, and the syringe 411 is fixedly installed on the connecting plate.

[0050] Even if there is no resin sand adhered to the inner oscillation mold 32, there is still friction between the resin sand and the inner oscillation mold 32. When the folding plate 47 is pushed upward, the buffer telescopic rod 410 is first completely retracted. During this process, the syringe 411 is not subjected to thrust, thereby avoiding wasting the release agent in the syringe 411.

[0051] like Figure 5 and Figure 6 As shown, the extension shaft 48 is fixedly installed at the folding axis of the folding plate 47, the linkage frame 49 is fixedly installed at the bottom of the buffer telescopic rod 410, the outer part of the extension shaft 48 is slidably connected with the linkage frame 49, the top of the guide rod 412 is fixedly connected with the syringe 411, the linkage frame 49 slides up and down along the guide rod 412, and the extension shaft 48 is misaligned with the linkage frame 49. When the top of the folding plate 47 moves upward, the extension shaft 48 drives the linkage frame 49 to move upward. When the buffer telescopic rod 410 is fully retracted, the syringe 411 is subjected to the extrusion force and squeezes the release agent into the inner oscillation mold 32. The guide rod 412 guides the linkage frame 49. The folding plate 47, the extension shaft 48 and the linkage frame 49 cooperate to prevent the folding plate 47 from being stuck when moving.

[0052] When the resin sand adheres to the inner oscillation mold 32, there is friction between the resin sand and the inner oscillation mold 32. At this time, the first push plate 42 uses the coil spring 45 to push the second push plate 44 to compress the coil spring 45, thereby avoiding forcibly pushing the resin sand and causing the resin sand to be incomplete. The first push plate 42 and the second push plate 44 clamp the folding plate 47, and the folding plate 47 is pushed upward. The folding plate 47 uses the linkage frame 49 to squeeze the syringe 411 to squeeze the demolding agent into the inner oscillation mold 32 to facilitate the demolding of the resin sand. When the resin sand can be pushed, the second push plate 44 and the demolding rod 46 move, and the folding plate 47 is no longer clamped by the first push plate 42 and the second push plate 44, and the demolding agent is no longer injected into the inner oscillation mold 32.

[0053] like Figure 3 and Figure 7 As shown, an oscillation diffuser assembly 5 is provided at the top of the outer support mold 31 and inside the injection pipe 413. The oscillation diffuser assembly 5 includes a turbine fan 51, a connecting shaft 52, a rotary block 53, a sliding track 54 and an impact block 56. The two ends of the connecting shaft 52 are respectively on the inner and outer sides of the injection pipe 413. One end of the connecting shaft 52 is fixedly installed with the turbine fan 51, and the other end of the connecting shaft 52 is fixedly installed with the rotary block 53. The sliding track 54 is opened on the arc surface of the rotary block 53, and the impact block 56 slides along the sliding track 54.

[0054] When the release agent is injected into the inner oscillation mold 32 from the injection pipe 413 , the flow of the release agent drives the turbine fan 51 to rotate, so that the rotating block 53 rotates, thereby causing the ball 55 and the impact block 56 to move up and down, and the impact block 56 impacts and vibrates the inner oscillation mold 32 .

[0055] The impact block 56 is connected to a ball 55 that rotates toward one side of the rotating block 53. The ball 55 slides in the sliding track 54. The sliding track 54 adopts an annular wavy structure to increase the impact frequency of the impact block 56. The impact block 56 slides up and down inside the outer support mold 31, and the bottom of the impact block 56 extends to the outer wall of the inner oscillation mold 32.

[0056] When the release agent is injected into the inner oscillation mold 32, the turbine fan 51 and the rotary block 53 rotate, causing the ball 55 and the impact block 56 to move up and down. The impact block 56 impacts and vibrates the inner oscillation mold 32, which on the one hand assists in demolding, and on the other hand accelerates the penetration speed of the release agent under the action of vibration.

[0057] like Figure 8 As shown, an oscillation cavity 34 is formed between the inner oscillation mold 32 and the outer support mold 31, and a collision block 56 slides up and down in the oscillation cavity 34. Two collision blocks 56 are provided, and are respectively located at the upper and lower sides of the inner oscillation mold 32. A plurality of release agent injection ports 33 are provided inside the inner oscillation mold 32, and the plurality of release agent injection ports 33 are distributed in a straight line and equidistantly along the inner oscillation mold 32, and the release agent injection ports 33 are connected to the injection pipe 413.

[0058] Through the structure of multiple release agent injection ports 33, the contact area between the resin sand inside the inner oscillation mold 32 and the release agent is increased to accelerate the reaction of the release agent and speed up demolding. Since there is a distance between the inner oscillation mold 32 and the oscillation cavity 34, the inner oscillation mold 32 can vibrate.

[0059] A resin sand molding casting production demoulding method is applied to the above-mentioned resin sand molding casting production demoulding tooling, and the steps are as follows:

[0060] S1. Pushing and demolding: The hydraulic push rod 41 is extended to move the first push plate 42, the coil spring 45 and the second push plate 44, so that the demolding rod 46 slides into the inner oscillation mold 32, and the resin sand inside the inner oscillation mold 32 is pushed out, and the demolding is completed;

[0061] S2, adhesion slow push: when the resin sand adheres to the inner oscillation mold 32, there is friction between the resin sand and the inner oscillation mold 32. At this time, the first push plate 42 uses the coil spring 45 to push the second push plate 44, which will compress the coil spring 45, thereby avoiding forcibly pushing the resin sand and causing the resin sand to be incomplete;

[0062] S3, filling the mold release agent: when the resin sand adheres to the casting support 1, the first push plate 42 cannot move and push the second push plate 44 by the spiral spring 45, the distance between the first push plate 42 and the second push plate 44 is reduced, the first push plate 42 and the second push plate 44 clamp the folding plate 47, the folding plate 47 is pushed up, and the folding plate 47 uses the linkage frame 49 to squeeze the syringe 411, so as to squeeze the mold release agent into the inner oscillation mold 32;

[0063] S4, auxiliary demolding: the demolding agent in the syringe 411 enters the inner oscillating mold 32 through the injection tube 413, and the demolding agent drives the turbine fan 51 to rotate, so that the rotating block 53 rotates, thereby causing the ball 55 and the impact block 56 to move up and down. The impact block 56 impacts and vibrates the inner oscillating mold 32, which not only assists demolding, but also accelerates the penetration speed of the demolding agent under the action of vibration;

[0064] S5. Contact surface expansion: The contact area between the resin sand inside the inner oscillation mold 32 and the release agent is increased through the structure of multiple release agent injection ports 33 to speed up the reaction of the release agent and accelerate demolding. Since there is a distance between the inner oscillation mold 32 and the oscillation cavity 34, the inner oscillation mold 32 can vibrate.

[0065] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A mold-making tool for resin sand casting production, characterized in that: include: A casting support (1), a resin filling tube (2) being fixedly mounted at a central position of a side portion of the casting support (1), and a connecting plate being fixedly mounted between the casting support (1) and the resin filling tube (2); A molding assembly (3) comprising an outer supporting mold (31) and an inner oscillating mold (32), wherein the inner oscillating mold (32) is fixedly mounted inside the outer supporting mold (31), and a side portion of the outer supporting mold (31) is fixedly connected to the resin filling tube (2); A die-pulling assembly (4), comprising a hydraulic push rod (41), a first push plate (42), a second push plate (44), a coil spring (45), a die-pulling rod (46), a folding plate (47) and an injection assembly, wherein the hydraulic push rod (41) comprises a first end and a second end, the first end is fixedly mounted with the first push plate (42), the interior of the molding assembly (3) is slidably connected with the die-pulling rod (46), one end of the die-pulling rod (46) is fixedly mounted with the second push plate (44), the coil spring (45) is elastically connected between the first push plate (42) and the second push plate (44), the first push plate (42) and the second push plate (44) are both rotatably connected with the folding plate (47) on one side facing each other, and the injection assembly is arranged on the top of the folding plate (47); The second end of the hydraulic push rod (41) is fixedly connected to the casting support (1), the end of the injection assembly is connected to the inner oscillation mold (32), and the other end of the ejector rod (46) is in contact with the resin sand inside the inner oscillation mold (32); A guide telescopic rod (43) is fixedly installed between the first push plate (42) and the second push plate (44), the guide telescopic rod (43) passes through the center of the coil spring (45), the folding plate (47) adopts a V-shaped hinge structure, two mold-pulling assemblies (4) are provided, and the two mold-pulling assemblies (4) are symmetrical about the center of the resin filling tube (2); When there is no resin adhered inside the molding component (3), the ejector rod (46) slides along the molding component (3); when there is resin sand adhered inside the molding component (3), the ejector rod (46) remains stationary, the first push plate (42) and the second push plate (44) compress the coil spring (45) and fold the folding plate (47), and the top end of the folding plate (47) moves upward to push the injection component to squeeze the release agent into the inner oscillation mold (32).

2. The mold-cutting tool for resin sand casting production according to claim 1, characterized in that: The injection assembly comprises a buffer telescopic rod (410), a syringe (411), a guide rod (412) and an injection tube (413); the buffer telescopic rod (410) is mounted on the top of the folding plate (47); the syringe (411) is fixedly mounted on the top of the buffer telescopic rod (410); the injection tube (413) is fixedly mounted on the end of the syringe (411); the injection tube (413) extends to the interior of the inner oscillation mold (32); and the syringe (411) is fixedly mounted on the connecting plate.

3. The mold-cutting tool for resin sand molding casting production according to claim 2, characterized in that: An extension shaft (48) is fixedly installed at the folding axis of the folding plate (47), a linkage frame (49) is fixedly installed at the bottom of the buffer telescopic rod (410), the outside of the extension shaft (48) is slidably connected to the linkage frame (49), the top of the guide rod (412) is fixedly connected to the syringe (411), the linkage frame (49) slides up and down along the guide rod (412), and the extension shaft (48) and the linkage frame (49) are staggered.

4. The mold-cutting tool for resin sand casting production according to claim 3, characterized in that: An oscillation diffuser assembly (5) is arranged at the top of the outer support mold (31) and inside the injection pipe (413). The oscillation diffuser assembly (5) comprises a turbine fan (51), a connecting shaft (52), a rotary block (53), a sliding track (54) and an impact block (56). Two ends of the connecting shaft (52) are respectively arranged at the inner and outer sides of the injection pipe (413). One end of the connecting shaft (52) is fixedly mounted with the turbine fan (51), and the other end of the connecting shaft (52) is fixedly mounted with the rotary block (53). The sliding track (54) is provided on the arc surface of the rotary block (53), and the impact block (56) slides along the sliding track (54).

5. The mold-cutting tool for resin sand casting production according to claim 4, characterized in that: The impact block (56) is rotatably connected to one side of the rotating block (53), and the ball (55) slides in the sliding track (54). The sliding track (54) adopts an annular wavy structure. The impact block (56) slides up and down inside the outer support mold (31), and the bottom of the impact block (56) extends to the outer wall of the inner oscillation mold (32).

6. The mold-cutting tool for resin sand casting production according to claim 5, characterized in that: An oscillation cavity (34) is formed between the inner oscillation mold (32) and the outer support mold (31), and the impact block (56) slides up and down in the oscillation cavity (34). Two impact blocks (56) are provided, and the two impact blocks (56) are respectively located on the upper and lower sides of the inner oscillation mold (32).

7. The mold-cutting tool for resin sand casting production according to claim 6, characterized in that: A plurality of mold release agent injection ports (33) are provided inside the inner oscillation mold (32), the plurality of mold release agent injection ports (33) are distributed equidistantly in a straight line along the inner oscillation mold (32), and the mold release agent injection ports (33) are connected to the injection pipe (413).

8. A resin sand mold casting production demoulding method using the resin sand mold casting production demoulding tooling according to claim 7, characterized in that: Here are the steps: S1, demoulding by pushing: the hydraulic push rod (41) is extended to move the first push plate (42), the coil spring (45) and the second push plate (44), so that the demoulding rod (46) slides into the inner oscillation mold (32), and the resin sand in the inner oscillation mold (32) is pushed out, thereby completing demoulding; S2, adhesion slow push: when the resin sand adheres to the inner oscillation mold (32), there is friction between the resin sand and the inner oscillation mold (32), and at this time, the first push plate (42) uses the coil spring (45) to push the second push plate (44), so that the coil spring (45) is compressed; S3, filling the mold release agent: when the resin sand adheres to the casting support (1), the first push plate (42) cannot move and the coil spring (45) cannot push the second push plate (44), the distance between the first push plate (42) and the second push plate (44) is reduced, the first push plate (42) and the second push plate (44) clamp the folding plate (47), the folding plate (47) is pushed upward, and the folding plate (47) uses the linkage frame (49) to squeeze the syringe (411), so as to squeeze the mold release agent into the inner oscillation mold (32); S4, auxiliary demoulding: the demoulding agent in the syringe (411) enters the inner oscillating mold (32) through the injection tube (413), and the demoulding agent drives the turbine fan (51) to rotate, so that the rotating block (53) rotates, thereby causing the ball (55) and the impact block (56) to move up and down, and the impact block (56) impacts and vibrates the inner oscillating mold (32); S5. Contact surface expansion: The contact area between the resin sand inside the inner oscillation mold (32) and the release agent is increased by means of the structure of the plurality of release agent injection ports (33), thereby accelerating the reaction of the release agent and demolding. A distance is provided between the inner oscillation mold (32) and the oscillation cavity (34) so ​​that the inner oscillation mold (32) can vibrate.

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