A coating tool for lost foam molds

Abstract

The utility model discloses a kind of coating tool for lost foam, it is related to casting equipment technical field, the coating tool for lost foam includes: support frame;Fixed frame, including fixed frame, rotating rod and clamping assembly, two rotating rods are respectively arranged in the both ends of fixed frame and are rotatably connected with support frame, clamping assembly is arranged in fixed frame, rotating rod is also provided with spline shaft and rotating crank;Movable pressing arm, including adjusting rod and pressing die, adjusting rod is arranged in fixed frame, and pressing die is arranged in adjusting rod.The utility model is by being arranged in fixed frame with model and being fixed with clamping assembly, then rotating rod drives fixed frame to rotate relative to support frame, realize that model surface and cavity can be evenly coated with coating, spline shaft and detachable rotating crank are also provided on rotating rod, realize double mode driving, strong compatibility, the utility model has simple structure, low maintenance cost and reduces manual labor intensity, improves coating efficiency and casting quality.

Description

Technical Field

[0001] This utility model relates to the field of casting equipment technology, and in particular to a coating fixture for lost foam casting. Background Technology

[0002] In the lost foam casting process, the coating process is a crucial step in ensuring the quality of the casting. This process requires the refractory coating to be evenly applied to all surfaces of the lost foam (i.e., white mold) and the gating system. Currently, the industry commonly uses a purely manual dipping method for coating. This involves an operator grabbing the white mold's gating system (such as the sprue) and pressing the white mold into the coating tank. By repeatedly turning it over, the inner and outer surfaces of the white mold are coated with the coating.

[0003] However, existing technologies still have significant drawbacks. Large white molds with complex shapes generate significant buoyancy during the coating process, requiring operators to expend considerable physical strength or multiple operators to complete the coating task, resulting in high labor costs and low production efficiency. During the coating process, the white mold itself has low mechanical strength and is fragile. When operators overcome buoyancy and forcefully press the white mold into the coating pool, it is very easy for it to deform locally, produce indentations, or even crack. These model damages will appear on the casting, leading to the scrapping of the casting. At the same time, for models with deep cavities and complex internal cavities, excess coating in the cavity after dipping is difficult to be discharged naturally by gravity, resulting in coating accumulation and uneven coating. Drying such models will cause coating cracking, which can easily cause defects such as sand adhesion and mold expansion during later pouring.

[0004] Therefore, there is a need for a tooling that can uniformly coat the white model with paint while reducing manual labor and labor costs. Utility Model Content

[0005] The main purpose of this utility model is to provide a coating fixture for lost foam casting, which aims to solve the problems of high labor costs and excessive labor intensity in the existing coating process for lost foam casting.

[0006] To achieve the above objectives, the present invention proposes a coating fixture for lost foam casting, comprising:

[0007] Support frame, which is mounted on the paint tank;

[0008] A fixing frame includes a fixing frame, rotating rods, and a clamping assembly. There are two rotating rods, which are respectively disposed at both ends of the fixing frame and rotatably connected to the support frame, and the two rotating rods are coaxially arranged. The clamping assembly is disposed on the inner side of the fixing frame. Each rotating rod is also provided with a spline shaft and a rotating crank. At least one of the rotating rods has a spline shaft at one end away from the fixing frame, and the rotating crank is detachably connected to the spline shaft.

[0009] The movable pressure arm includes an adjusting rod and a pressing mold. The adjusting rod is movably disposed at both ends of the fixed frame and extends outward along the length direction of the fixed frame. The pressing mold is disposed on the adjusting rod facing the side of the fixed frame.

[0010] Preferably, the rotating crank includes a spline sleeve and a handle. One end of the spline sleeve is fixedly connected to the handle, and the other end of the spline sleeve has an inner hole with spline teeth adapted to the spline shaft. The spline sleeve and the spline shaft are detachably sleeved together axially.

[0011] Preferably, the support frame further includes a damping seat, which is arranged along the axis of the rotating rod. The damping seat is also provided with a friction plate assembly and a scale, both of which are annular structures. The scale is sleeved on the friction plate assembly, and the rotating rod is rotatably connected to the friction plate assembly.

[0012] Preferably, the support frame further includes a wear-resistant sleeve, the support frame has an arc-shaped groove, the wear-resistant sleeve has a circular structure, the wear-resistant sleeve is disposed in the arc-shaped groove and the center of the wear-resistant sleeve is collinear with the center of the arc-shaped groove, and the wear-resistant sleeve is sleeved on the damping seat.

[0013] Preferably, the molding component includes a flexible pad and a fixing plate. The number of fixing plates can be multiple, and the multiple fixing plates are arranged at intervals. One end of the fixing plate is fixedly connected to the adjusting rod by bolts, and the other end of the fixing plate is connected to the flexible pad.

[0014] Preferably, the fixing frame further includes a slide rail and a counterweight. The slide rail is fixedly disposed at the bottom of the fixing frame, and the counterweight is slidably connected to the slide rail. The counterweight is also provided with a locking bolt, which passes through the counterweight along the axial direction of the counterweight and abuts against the slide rail.

[0015] This invention achieves uniform coating of paint on both the model surface and the cavity by placing the model within a fixed frame and securing it with clamping components, then using a rotating rod to drive the fixed frame to rotate relative to the support frame. This ensures even paint coverage on complex curved surfaces and deep cavity structures. The rotating rod also features a splined shaft and a detachable crank, enabling dual-mode drive and strong compatibility. This invention boasts a simple structure, low maintenance costs, reduced manual labor intensity, and improved model yield and casting success rate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a coating fixture for lost foam casting according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the white mold during assembly according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the rotating crank in one embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a damping seat according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the slide rail structure according to an embodiment of the present invention.

[0022] Explanation of icon numbers:

[0023]

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators in this embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] like Figures 1-5 As shown, this utility model proposes a coating fixture 1000 for lost foam casting, comprising: a support frame 100, which is mounted on a coating tank; a fixing frame 200, which includes a fixing frame 210, rotating rods 220, and a clamping assembly 230. There are two rotating rods 220, which are respectively disposed at both ends of the fixing frame 210 and rotatably connected to the support frame 100, and the two rotating rods 220 are coaxially arranged. The clamping assembly 230 is disposed inside the fixing frame 210. The frame 200 also includes a spline shaft 221 and a rotating crank 222. At least one rotating rod 220 has a spline shaft 221 at one end away from the fixed frame 200. The rotating crank 222 is detachably connected to the spline shaft 221. The movable pressure arm 300 includes an adjusting rod 310 and a pressing mold 320. The adjusting rod 310 is movably disposed at both ends of the fixed frame 210 and extends outward along the length direction of the fixed frame 200. The pressing mold 320 is disposed on the adjusting rod 310 on one side facing the fixed frame 210.

[0029] In this embodiment, the support frame 100 can be a gantry frame or a bridge structure. The support frame 100 spans both ends of the paint tank. The fixing frame 210 in the fixing frame 200 is arranged along the length direction of the support frame 100 and extends downward. The fixing frame 210 is provided with two rotating rods 220 that are fixed by bolts along the length direction of the support frame 100. The two rotating rods 220 are respectively arranged at both ends of the fixing frame 210 along the length direction. The rotating rods 220 drive the fixing frame 210 to rotate. The fixed frame 210 has a U-shaped cross-sectional structure. After the operator places the white mold 2000 into the fixed frame 210, the adjusting rod 310 in the movable pressure arm 300 needs to be pushed into the fixed frame 210 along the opening direction of the fixed frame 210, so that the pressing mold part 320 on the adjusting rod 310 is in close contact with the outer surface of the white mold 2000, thereby fixing the white mold 2000. After fixing the white mold 2000, the rotating rod 220 is rotated to drive the fixed frame 210 to rotate, so that the white mold 2000 can be repeatedly immersed in the paint pool to complete the coating of paint.

[0030] In detail, this utility model has two driving modes. One mode involves the operator fitting a rotating crank 222 along the length of the rotating rod 220 onto the splined shaft 221 at one end of the rotating rod 220. It is understood that the rotating crank 222 also includes a locking pin. After the rotating crank 222 is fitted onto the splined shaft 221, the locking pin is used to lock it. After locking, the operator manually rotates the crank 222 to drive the fixed frame 210 to rotate at a constant speed. After the white mold 2000 is coated, the rotating crank 222 is pulled out and stored for later use. The other driving mode of this utility model involves aligning the output shaft of the geared motor (with an internal spline connector) with the splined shaft 221 of the rotating rod 220 and pushing it in axially. After pushing it in, the motor is locked with bolts or flange clamps, and the motor is started to automatically complete the rotation of the fixed frame 210.

[0031] More specifically, in this invention, the operator fixes the assembled and bonded white mold clusters 2000 into the fixing frame 210 using the clamping component 230. The operator then rotates the white mold using a dual-mode drive system: either manually by placing a spline sleeve 222A on the spline shaft 221 and rotating the crank 222 at the other end of the spline sleeve 222A, or electrically by connecting a motor to the spline shaft 221. This allows the coating to be evenly applied to the surface of the white mold 2000, ensuring the entire white mold 2000 is covered inside and out. After coating, the white mold 2000 is removed from the invention and proceeds to the drying process. For small-batch trial production, manual operation is possible; for large-batch production, a motor can be used for operation.

[0032] In one embodiment, the crank 222 includes a spline sleeve 222A and a handle 222B. One end of the spline sleeve 222A is fixedly connected to the handle 222B, and the other end of the spline sleeve 222A has an inner hole with spline teeth that are adapted to the spline shaft 221. The spline sleeve 222A and the spline shaft 221 are detachably sleeved along the axial direction.

[0033] In this embodiment, the handle 222B is an L-shaped or straight rod structure with a length of 300-600mm, used to provide a lever and reduce the labor intensity required for manual rotation. Before use, the operator aligns the spline sleeve 222A with the spline shaft 221 section at the end of the rotating rod 220, pushes it axially, and inserts a locking pin to complete the locking. The locking pin can be an elastic positioning pin or a quick-release locking pin, etc., which is used to lock the spline sleeve 222A laterally through to prevent it from coming out during rotation. Then, the operator rotates the handle 222B to drive the rotation.

[0034] In one embodiment, the support frame 100 further includes a damping seat 110, which is arranged along the axis of the rotating rod 220. The damping seat 110 is also provided with a friction plate group 111 and a scale 112. Both the friction plate group 111 and the scale 112 are circular ring structures. The scale 112 is sleeved on the friction plate group 111. The rotating rod 220 is rotatably connected to the friction plate group 111.

[0035] In this embodiment, the damping seat 110 is a ring-shaped bearing composed of a friction plate assembly 111 and a scale plate 112. The outer side of the bearing is the scale plate 112, and the inner side is inlaid with friction plates. The rotating rod 220 passes through the damping seat 110 and is engraved with scale marks. The damping seat 110 is prestressed with 3~5 N·m to provide damping force during rotation, ensuring that the operator can evenly crank the handle 222B when cranking the crank, preventing the white mold 2000 from being damaged due to inertial swinging and collision with the pool wall. At the same time, uniform rotation ensures that the coating adheres evenly without drips or white spots. It is understood that if an angle locking mechanism can be used in actual production to fix the white mold 2000, it will be easier to perform local touch-up coating.

[0036] In one embodiment, the support frame 100 further includes a wear-resistant sleeve 120. The support frame 100 has an arc-shaped groove. The wear-resistant sleeve 120 has a circular structure. The wear-resistant sleeve 120 is disposed in the arc-shaped groove and the center of the arc-shaped groove is collinear with the center of the arc-shaped groove. The wear-resistant sleeve 120 is sleeved on the damping seat 110.

[0037] In this embodiment, the wear-resistant sleeve 120 is press-fitted into the arc-shaped groove opened on the support frame 100, and the wear-resistant sleeve 120 is sleeved on the damping seat 110. The inner diameter of the wear-resistant sleeve 120 is 0.05~0.1mm larger than the outer diameter of the damping seat 110, forming a clearance fit. It can be understood that the wear-resistant sleeve 120 is made of a self-lubricating material, which extends the working life of the support frame 100 during use. After wear, only the wear-resistant sleeve 120 needs to be replaced, avoiding wear of the support frame 100 during long-term operation, which would cause the fixed frame 210 to shake during rotation, effectively ensuring the stability of the coating uniformity during long-term operation.

[0038] In one embodiment, the molding component 320 includes a flexible pad 321 and a fixing plate 322. There can be multiple fixing plates 322, which are spaced apart. One end of the fixing plate 322 is fixedly connected to the adjusting rod 310 by bolts, and the other end of the fixing plate 322 is connected to the flexible pad 321.

[0039] In this embodiment, the fixing plate 322 is fixed to the adjusting rod 310 at the position corresponding to the white mold 2000 that needs to be fixed, using bolts or quick clamps. The flexible pad 321 is adhered to the fixing plate 322 on the side facing the white mold 2000, and the white mold 2000 is pressed against the flexible pad 321. The flexible pad 321 can be made of silicone or sponge. The flexible pad 321 can disperse the pressure generated by the white mold 2000 during rotation, preventing the surface of the white mold 2000 from denting or cracking. At the same time, the flexible pad 321 can be replaced after wear, reducing production costs.

[0040] In one embodiment, the fixing frame 200 further includes a slide rail 240 and a counterweight 250. The slide rail 240 is fixedly disposed at the bottom of the fixing frame 210. The counterweight 250 is slidably connected to the slide rail 240. The counterweight 250 is also provided with a locking bolt. The locking bolt passes through the counterweight 250 along the axial direction of the counterweight 250 and abuts against the slide rail 240.

[0041] In this embodiment, the bottom of the fixed frame 210 is provided with a slide rail 240, and a counterweight 250 that can slide along the length of the slide rail 240 is provided on the slide rail 240. It can be understood that the counterweight 250 is also provided with a locking bolt passing through it in a direction perpendicular to the slide rail 240. The operator can lock or unlock the counterweight 250 to the slide rail 240 by rotating the locking bolt. There can be multiple models of counterweight 250, with multiple different models matching different weights. The weight of the counterweight 250 itself can be used to counteract the buoyancy of the white mold 2000 in the paint tank, and can also be used to adjust the weight of the irregularly shaped white mold 2000 during rotation, ensuring a uniform rotation speed during the rotation process.

[0042] This invention achieves uniform coating of paint on both the model surface and the cavity by placing the model within a fixed frame and securing it with clamping components, then using a rotating rod to drive the fixed frame to rotate relative to the support frame. This ensures even paint coverage on complex curved surfaces and deep cavity structures. The rotating rod also features a splined shaft and a detachable crank, enabling dual-mold drive with strong compatibility. Furthermore, this invention utilizes a flexible pad to achieve a pressing fit with a damping seat to ensure uniform rotation, preventing indentations, deformation, or cracking of the white mold during operation. This invention has a simple structure, low maintenance costs, reduces manual labor intensity, and improves the yield of model products and castings.

[0043] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A coating fixture for lost foam casting, characterized in that, include: Support frame, which is mounted on the paint tank; A fixing frame includes a fixing frame, rotating rods, and a clamping assembly. There are two rotating rods, which are respectively disposed at both ends of the fixing frame and rotatably connected to the support frame, and the two rotating rods are coaxially arranged. The clamping assembly is disposed on the inner side of the fixing frame. Each rotating rod is also provided with a spline shaft and a rotating crank. At least one of the rotating rods has a spline shaft at one end away from the fixing frame, and the rotating crank is detachably connected to the spline shaft. The movable pressure arm includes an adjusting rod and a pressing mold. The adjusting rod is movably disposed at both ends of the fixed frame and extends outward along the length direction of the fixed frame. The pressing mold is disposed on the adjusting rod facing the side of the fixed frame.

2. The coating fixture for lost foam casting as described in claim 1, characterized in that, The rotating crank includes a spline sleeve and a handle. One end of the spline sleeve is fixedly connected to the handle, and the other end of the spline sleeve has an inner hole with spline teeth that are adapted to the spline shaft. The spline sleeve and the spline shaft are detachably sleeved together axially.

3. The coating fixture for lost foam casting as described in claim 2, characterized in that, The support frame also includes a damping seat, which is arranged along the axis of the rotating rod. The damping seat is also provided with a friction plate assembly and a scale, both of which are annular structures. The scale is sleeved on the friction plate assembly, and the rotating rod is rotatably connected to the friction plate assembly.

4. The coating fixture for lost foam casting as described in claim 3, characterized in that, The support frame also includes a wear-resistant sleeve. The support frame has an arc-shaped groove. The wear-resistant sleeve has a circular structure. The wear-resistant sleeve is disposed in the arc-shaped groove and the center of the arc-shaped groove is collinear with the center of the arc-shaped groove. The wear-resistant sleeve is fitted onto the damping seat.

5. The coating fixture for lost foam casting as described in claim 1, characterized in that, The molding component includes a flexible pad and a fixing plate. There can be multiple fixing plates, which are spaced apart. One end of each fixing plate is fixedly connected to the adjusting rod by bolts, and the other end of each fixing plate is connected to the flexible pad.

6. The coating fixture for lost foam casting as described in claim 1, characterized in that, The fixing frame also includes a slide rail and a counterweight. The slide rail is fixedly installed at the bottom of the fixing frame. The counterweight is slidably connected to the slide rail. The counterweight is also provided with a locking bolt. The locking bolt passes through the counterweight along the axial direction of the counterweight and abuts against the slide rail.

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