A multi-functional rotary blade sand mold shaper

Abstract

The utility model discloses a multifunctional sand mould shaping device of rotary blade, its characterized in that, including: a hollow handle, its inside is equipped with the accommodation space, an articulated part of setting up in handle one end, be equipped with the positioning mechanism of loose and locking on this articulated part, at least three function tools, rotatably connected in handle through articulated part, and can switch between the position of working position and being accomodated in handle accommodation space. Function tool includes tool A and constitutes the fine repair spoon for fine finishing in one end, tool B and constitute the long strip arc-shaped scraper of the longitudinal cutting part of circular tube in one end, as the coarse repair spoon, tool C and constitute the tooth-shaped scraper in one end. The back of long strip arc-shaped scraper of tool B, with the back of tool C, are configured to be able to cooperate with each other, and form a smooth arc-shaped calendering bar with the cross section of approximate ellipse. Have the advantages of high integration and portable, function innovation and new combination.

Description

Technical Field

[0001] This utility model relates to the field of sand casting technology in the foundry industry, and in particular to a handheld rotary blade multi-functional sand mold shaping tool for repairing complex structures such as curved surfaces and narrow concave surfaces of sand mold cavities. Background Technology

[0002] In the sand casting process, the surface of the sand mold cavity after demolding often has defects such as burrs, protrusions, unclear contours, or localized looseness. Specialized tools are needed for fine finishing to ensure the dimensional accuracy and surface quality of the casting. Currently, the widely used finishing tool is the spoon-shaped trimmer, commonly known as the "autumn leaf," which has spoon-shaped structures of different sizes at both ends, used for trimming curved and concave surfaces of different sizes.

[0003] However, traditional "autumn leaf" tools have limited functionality. For example, patent publication number CN209918832U describes an aluminum alloy casting autumn leaf tool, comprising a first dressing tool body. A connecting rod is provided on the outer surface of the first dressing tool body's side. A fixing ring is provided on the outer side of one end of the connecting rod. A fixing seat is provided below the fixing ring. A locking screw is provided near the center of the upper outer surface of the fixing ring. A connecting post is provided on one side of the fixing seat. A connecting disc is provided near the middle section of the outer surface of the connecting post. A reinforcing flexible steel wire is provided on the outer surface of the connecting disc. A sphere is provided at one end of the connecting post. When dealing with complex sand mold cavities, foundry workers need to carry multiple tools simultaneously, such as different sizes of dressing knives, scrapers, and awls. Frequent tool changes not only reduce work efficiency but also make tools prone to loss or inconvenient to retrieve. Furthermore, for special structures such as deep and narrow ribs and reinforcing ribs in sand molds, existing tools struggle to penetrate and effectively compact and finish, resulting in unsatisfactory dressing effects and efficiency.

[0004] Therefore, there is an urgent need in this field for a handheld shaping tool that integrates multiple functions, is easy to carry and use, and can effectively handle special sand-shaped structures. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a multi-functional sand mold shaping tool with a rotating blade. It integrates multiple trimming functions, is easy to carry, and can create new functions through the combination of tools to solve the trimming problems of complex sand molds.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a multi-functional sand mold shaping tool with a rotating blade, characterized in that it includes: a hollow handle with an internal accommodating space; a hinge part disposed at one end of the handle, the hinge part being provided with a positioning mechanism that can be released and locked; at least three functional tools, which are rotatably connected to the handle through the hinge part and can be switched between a working position and a position stored in the accommodating space of the handle.

[0007] The at least three functional tools include: Tool A: One end of which forms a finishing tool for fine finishing; Tool B: One end of which forms a long, curved scraper formed by longitudinally cutting a round tube, serving as a rough finishing tool; Tool C: One end of which forms a toothed scraper.

[0008] The back of the long, curved scraper of tool B and the back of tool C are configured to cooperate with each other to form a smooth, curved polishing rod with an approximately elliptical cross-section.

[0009] In the aforementioned multi-functional sand mold shaping tool with a rotating blade, the functional tool further includes tool D: one end of which forms a pointed cone, and tool D is rotatably connected to tools A, B, and C through a hinge.

[0010] In the aforementioned multi-functional sand mold shaping tool with a rotary blade, the positioning mechanism of the hinge portion further includes a spring pin, a retaining ball, or a friction washer structure to achieve tool positioning and locking.

[0011] In the aforementioned multi-functional sand mold shaping tool with a rotating blade, the arc-shaped scraper of tool B is further composed of an arc segment of one-eighth to one-quarter of the cross-section of a circular tube cut longitudinally.

[0012] In the aforementioned multi-functional sand mold shaping tool with a rotating blade, the back of the tool C is an arc surface that matches the curvature of the arc scraper of the tool B. When the two are in contact with each other, they can be seamlessly combined to form a smooth arc-shaped polishing rod with an approximately elliptical cross-section.

[0013] In the aforementioned multi-functional sand mold shaping tool with a rotating blade, the surface of the finishing spoon is elliptical or teardrop-shaped, and its edges are rounded.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. High integration and portability: The design is retractable, integrating a variety of commonly used sanding tools into one handle. The tools are easy to access, carry and manage, effectively solving the problem of having many tools and being easy to lose.

[0015] 2. Functional Innovation and Combination: Through a unique structural design, tool B and tool C can be combined into a brand-new, multifunctional arc-shaped calendering rod, which is specifically designed for deep and narrow ribs, reinforcing ribs and other structures in high-efficiency calendering sand molds that are difficult to handle with traditional tools, significantly improving finishing quality and efficiency.

[0016] 3. Excellent ergonomics: When any tool is in use, the handle itself and the other tools stored or used as support together form a stable and comfortable grip, ensuring the stability and accuracy of operation.

[0017] 4. Robust and durable: The tool is made of high-quality steel and heat-treated to ensure the hardness and wear resistance of the working parts. The locking mechanism of the hinge ensures rigidity and stability during operation, making it suitable for the harsh working environment of the foundry. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the tool D in use according to this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of a precision repair key in the open state according to this utility model.

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure in direction A.

[0021] Figure 4 This is a schematic diagram of the structure of a rough repair key in the open state according to this utility model.

[0022] Figure 5 yes Figure 4 A magnified schematic diagram of the medium-coarse finishing key.

[0023] Figure 6 This is a schematic diagram of the open state of the two-in-one roughing tool and toothed scraper of this utility model.

[0024] Figure 7 This is a schematic diagram of the BB-direction structure in section 6.

[0025] In the diagram: 1-handle, 2-positioning mechanism, 3-functional tool, 301-fine finishing key, 302-rough finishing key, 303-toothed scraper. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and with reference to the accompanying drawings.

[0027] like Figure 1As shown, this embodiment discloses a multi-functional sander tool with a rotary blade, comprising a hollow handle 1 with a receiving space, which can accommodate all the functional tools 3 mounted on the tool; a hinge portion located at one end of the handle 1, which is equipped with a positioning mechanism 2 that can be released and locked. The positioning mechanism 2 includes structures such as spring pins, retaining balls, or friction washers, all of which can utilize existing technologies to achieve tool positioning and locking. This tool has a total of four functional tools 3, all rotatably connected to the handle 1 via the hinge portion, and can switch between a working position and a position stored within the receiving space of the handle 1.

[0028] Both the hinge and functional tool 3 are made of 5Cr15Mov stainless steel or 65Mn spring steel. 5Cr15Mov is wear-resistant, corrosion-resistant, easy to grind, and has good shape retention, making it a commonly used steel for high-quality tools and ideal for sanding. 65Mn, on the other hand, has excellent elasticity, making it suitable for tool parts requiring a certain degree of toughness, and offers good heat treatment performance. All working parts (cutting edges, curved surfaces) of all functional tools 3 undergo localized quenching and tempering to ensure high hardness and wear resistance, while the hinge holes and handle maintain good toughness. The entire assembly is sandblasted or polished to prevent sand adhesion and facilitate cleaning.

[0029] Furthermore, the hinge is connected using a sturdy stainless steel rivet or a screw with a locking washer. This hinge method ensures that the functional tool 3 has a certain damping feel when rotating, allowing it to remain stable at any angle, and also ensures that it will not loosen after being joined.

[0030] The four functional tools include: Tool A: One end of which forms a finishing key 301 for fine finishing, such as... Figure 2 , Figure 3 As shown, its shape is a small oval or teardrop-shaped spoon end with a smoothly rounded and precise edge. Its function is specifically for finishing narrow, delicate concave surfaces, grooves, and inner rounded corners. Its small head can reach deep into the intricate details of complex cavities.

[0031] Tool B: One end of which forms a long, arc-shaped scraper created by longitudinally cutting a section of a round tube, serving as a roughing tool 302, such as... Figure 4 , Figure 5 As shown, this is a scraper with a long, curved surface, which can be used for scraping, pressing, and shoveling, and can also be used as a spoon. It can be used to scrape and remove small protrusions and burrs on sand-like surfaces for initial smoothing, and can also be used to trim larger curved surfaces and pits to remove more excess material.

[0032] Tool C: One end of which forms a toothed scraper 303, which can be used to treat surfaces that need roughening, or to scratch repairs to increase adhesion before applying paint.

[0033] Tool D: One end of which forms a pointed cone, and it is rotatably connected to tools A, B, and C via hinge 2. Tool D is specifically used for tasks such as clearing risers and gating gates, punching out vent holes, and removing impurities from sand molds.

[0034] Specifically, the back of tool C is an arc surface that matches the curvature of the arc-shaped scraper of tool B. When the two surfaces are in contact, they can seamlessly combine to form a smooth, arc-shaped polishing rod with an approximately elliptical cross-section. That is, the back of the long, arc-shaped scraper of tool B and the back of tool C are configured to cooperate with each other to form a smooth, arc-shaped polishing rod with an approximately elliptical cross-section. Figure 6 , Figure 7 As shown, the arc-shaped scraper of tool B is composed of a quarter-arc segment of the cross-section of a circular tube cut longitudinally. The back of tool C forms an approximate ellipse with the quarter-arc segment of tool B. Since both backs are smooth surfaces, an arc-shaped polishing rod is formed under the action of positioning mechanism 2. This rod has a smooth arc-shaped surface with a specific radius of curvature, and its main function is for efficient polishing: specifically used for trimming and compacting deep and narrow ribs, reinforcing ribs, or vertical arc-shaped walls in sand molds. Traditional tools have difficulty penetrating these areas and performing effective finishing operations. It can complete the compaction and smoothing of the rounded corners on both sides of the ribs and the top surface, with high efficiency and ensuring shape consistency.

[0035] Examples of working modes and usage scenarios: A. Mode 1: Refining narrow concave surfaces Unfold the finishing key 301, retract other functional tools 3, and lock it. Refine the details and textures of gear grinding wheel cavities, artwork castings, etc.

[0036] B. Mode Two: Large-area scraping and rough finishing Unfold the roughing tool 302, retract other functional tools 3, and lock it. Scrape down the sand mold parting surface and trim the large curved surfaces of large castings.

[0037] C. Mode 3: Roughening Processing Unfold the toothed scraper 303, retract the other functional tools 3, and lock them in place. Roughen the surface of the repaired sand mold.

[0038] D. Mode 4: Drilling Unfold tool D (the pointed tip), retract other functional tools 3, and tighten. Create an venting channel for the sand core head.

[0039] E. Pattern 5: Ribs and Deep Groove Calendering Simultaneously unfold the roughing tool 302 and the toothed scraper 303, merging their front surfaces to form an arc-shaped rib polishing tool. Note: The two tools are stored in the handle 1, which is actually facing each other. Then, retract the other functional tools 3 and lock them in place. This tool can be used to trim the water jacket layer of engine block sand molds, the mesh-like reinforcing ribs of machine tool base sand molds, etc.

[0040] The above embodiments are illustrative of the present invention and not intended to limit it. Although the present invention has been described in conjunction with preferred embodiments, it should be understood that the present invention is not limited to the preferred embodiments. Those skilled in the art can make various equivalent modifications and substitutions to the technical solutions of the present invention based on its teachings. Therefore, the scope of the present invention should be defined by the claims, and all such equivalent modifications and substitutions fall within the protection scope of the present invention.

Claims

1. A multi-functional sand mold shaping tool with a rotating blade, characterized in that, include: A hollow handle (1) with an internal accommodating space; a hinge at one end of the handle (1) with a positioning mechanism (2) that can be released and locked; at least three functional tools (3) rotatably connected to the handle via the hinge and switchable between a working position and a position stored in the handle's accommodating space. The at least three functional tools include: Tool A: One end of which forms a finishing tool (301) for fine finishing; Tool B: One end of which forms a long, arc-shaped scraper formed by longitudinal cutting of a round tube, serving as a rough finishing tool (302); Tool C: One end of which forms a toothed scraper (303). The back of the long, curved scraper of tool B and the back of tool C are configured to cooperate with each other to form a smooth, curved polishing rod with an approximately elliptical cross-section.

2. The multi-functional sand mold shaping tool with a rotary blade according to claim 1, characterized in that, The functional tool also includes tool D: one end of which is a pointed cone, and tool D is rotatably connected to tools A, B, and C through a hinge.

3. A multi-functional sand mold shaping tool with a rotating blade according to claim 1 or 2, characterized in that, The positioning mechanism (2) of the hinge includes a spring pin, a ball bearing or a friction washer structure to achieve the positioning and locking of the tool.

4. The multi-functional sand mold shaping tool with a rotating blade according to claim 2, characterized in that, The arc-shaped scraper of tool B is composed of one-eighth to one-quarter arc segments of the cross-section of a circular tube cut longitudinally.

5. A multi-functional sand mold shaping tool with a rotary blade according to claim 4, characterized in that, The back of tool C is an arc surface that matches the curvature of the arc scraper of tool B. When the two are in contact with each other, they can be seamlessly combined to form a smooth arc-shaped calender with an approximately elliptical cross-section.

6. The multi-functional sand mold shaping tool with a rotating blade according to claim 2, characterized in that, The surface of the finishing spoon (301) is oval or teardrop-shaped, and its edges are rounded.

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