A film-coated sand core forming mold

Abstract

The utility model belongs to the technical field of motorcycle wheel manufacturing, specifically a coated sand core molding mold, including a sand core molding mold bottom plate, a coated sand core molding component is arranged on the top of the sand core molding mold bottom plate, and left and right clamping components are installed on the back of the coated sand core molding component, and a heating component is installed inside the coated sand core molding component, the coated sand core molding component includes a molding mold fixed mold, a first molding groove is opened inside the molding mold fixed mold, and a first diverter cone is arranged inside the first molding groove; the utility model is provided with a conical runner, when some sand cores with long handles are molded, it is convenient to prevent the long handles from breaking, and it is convenient to reduce the workload of subsequent grinding and deburring, and a heating rod is added at the diverter cone position, so as to ensure that the middle position of the sand core can also be heated and molded, so as to ensure the integrity of the sand core after molding.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle wheel manufacturing, in particular to a film-coated sand core forming die. Background Art

[0002] Coated sand is molding sand or core sand whose surface is covered with a layer of solid resin film before molding. Coated sand can be used for casting steel parts and iron parts. This process is also often used in the manufacturing process of motorcycle wheels. The wheel is the running part of the motorcycle, mainly composed of tires, rims, spokes (spokes) and hubs. The front wheel of a two-wheeled motorcycle is a guide wheel, and the rear wheel is a driving wheel. There is a certain difference in structure between the two. In order to reduce the weight of the wheel, a sand core of corresponding shape can be placed at the center of the hub and / or spokes (spokes) in the mold cavity during casting, so that the casting is formed and a hollow structure is obtained after removing the sand core.

[0003] In Chinese Patent 201911292637.1, the present invention provides a complex runner coated sand core forming mold, including: a hot runner plate, a first fixed plate, a concave mold, a punch, an ejector fixing plate, an ejector plate, a square iron and a bottom plate arranged in parallel from top to bottom, a square iron is installed around the top of the bottom plate, an ejector plate is installed inside the square iron, an ejector fixing plate is installed on the ejector plate, an ejector and a reset rod are provided on the ejector fixing plate, the ejector and the reset rod on the ejector fixing plate pass through the ejector fixing plate and the punch, and a second guide sleeve is embedded on the side of the punch away from the ejector fixing plate. The beneficial effects brought by the present invention are: horizontal parting, upper and lower mold closing, the gate of the runner is added with a core head as a sand shooting port, the sand core production efficiency is improved, and the quality of the casting is guaranteed; an inclined slider mechanism is adopted, so that the inclined slider mechanism can also act as an ejector during the mold opening process; the molding is convenient, efficient, and the product defect rate is low, and the cost is low.

[0004] The existing coated sand core molding mold has the problem that when producing some sand cores with long handles for molding, the sand shooting port is connected to the groove at the long handle of the mold. After molding, the sand remaining in the sand shooting channel is connected to the long handle of the sand core, and the further increased length of the handle makes it very easy to cause the handle to break during the demolding process. Even if there is no breakage, the excess sand remaining on the sand core due to the too long sand shooting channel will take up manpower and material resources to clean up. In addition, during the heating molding process, the sand core close to the diverter cone is thicker, and the heat transmitted by the electric heating rod that can be received is limited, which easily leads to the problem of incomplete sand core.

[0005] Therefore, a coated sand core forming mold is proposed to solve the above problems. Utility Model Content

[0006] In order to make up for the shortcomings of the prior art, the problem that when the existing coated sand core molding mold produces some sand cores with long handles for molding, the sand shooting port is connected with the groove at the long handle of the mold. After molding, the sand remaining inside the sand shooting channel is connected to the long handle of the sand core, and the length of the handle is further increased. During the demolding process, the handle is very likely to break. Even if there is no break, the excess sand remaining on the sand core due to the excessively long sand shooting channel will take up manpower and material resources to clean up. In addition, during the heating and molding process, the sand core close to the diverter cone is thicker, and the heat transmitted by the electric heating rod that can be received is limited, which easily leads to the problem of incomplete sand core.

[0007] The technical solution adopted by the utility model to solve its technical problems is: the utility model describes a coated sand core molding mold, including a sand core molding mold bottom plate, a coated sand core molding component is arranged on the top of the sand core molding mold bottom plate, and left and right clamping components are installed on the back of the coated sand core molding component, and a heating component is installed inside the coated sand core molding component, the coated sand core molding component includes a molding mold fixed mold, a first molding groove is opened inside the molding mold fixed mold, and a first diverter cone is arranged inside the first molding groove, and a heating rod insertion block is fixedly connected to the side of the first diverter cone, a conical runner is arranged on the top of the molding mold fixed mold, and a runner top block is integrally connected to the top of the conical runner, and a sand nozzle is arranged inside the conical runner, the side of the molding mold fixed mold is tightly fitted with the molding mold movable mold, and a second molding groove is opened inside the molding mold movable mold, and a second diverter cone is fixedly connected to the inside of the second molding groove.

[0008] Preferably, the heating rod insertion block passes through the interior of the first diverter cone, and the heating rod insertion block and the second diverter cone form a snap-fit ​​structure, the conical runner and the fixed mold of the molding mold form a detachable structure, and the conical runner and the first molding groove and the second molding groove both form a connecting structure.

[0009] Preferably, the left and right clamping assemblies include fixed pillars, the sides of the fixed pillars are installed with hydraulic push rods, and the ends of the hydraulic push rods are fixedly connected to the movable mold connecting block, the inner wall of the movable mold connecting block is slidably connected to a disassembly slider, and the end of the disassembly slider is threadedly connected to a fixing bolt, the side of the disassembly slider is fixedly connected to a mold disassembly block, and the other side of the mold disassembly block is fixedly connected to a mold pillar, the outer wall of the movable mold connecting block is fixedly connected to a limiting guide cylinder, and the interior of the limiting guide cylinder is slidably connected to the limiting guide column, and the end of the limiting guide column is fixedly connected to the fixed mold connecting block.

[0010] Preferably, the movable mold connecting block and the fixed mold connecting block are arranged in parallel, and the movable mold connecting block forms a sliding structure through a limiting guide cylinder and a limiting guide column, the mold disassembly block forms a sliding structure with the movable mold connecting block through a disassembly slider, and the disassembly slider forms a detachable structure with the movable mold connecting block through a fixing bolt.

[0011] Preferably, the heating component comprises a first electric heating rod, and an end of the first electric heating rod is electrically connected to a first connecting wire, and a second electric heating rod is arranged on the side of the first electric heating rod, and an end of the second electric heating rod is electrically connected to a second connecting wire.

[0012] Preferably, the second electric heating rod is shaped as a "7" shape, and the second electric heating rod runs through the interior of the heating rod insertion block.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model is provided with a coated sand core molding assembly, the movable mold of the molding mold is tightly fitted with the fixed mold of the molding mold, and the first molding groove and the second molding groove inside thereof can be combined to form the shape of the sand core, and then the coated sand can be injected into the molding, and a conical runner is provided at the sand shooting port, which can be removed after molding to complete the separation of the sand core body and the sand shooting flow channel, and at the same time, the excess hot sand in the conical runner is taken out, so as to prevent it from being connected with the long handle of the sand core and causing breakage when taking out the mold, and at the same time, it is convenient to reduce the workload of subsequent grinding and deburring;

[0015] 2. The utility model is provided with left and right mold clamping assemblies. Under the drive of the hydraulic push rod, the movable mold connecting block is pushed forward, and then the movable mold of the forming mold is moved forward to be combined with the fixed mold of the forming mold. A limiting guide cylinder and a limiting guide column are provided on the side to facilitate the limiting of the movable mold connecting block during movement, so as to ensure that the movable mold of the forming mold and the fixed mold of the forming mold are aligned. A disassembly and assembly slider and fixing bolts are provided to enable the forming mold to be disassembled and assembled, so as to facilitate the replacement of the mold after the production of a batch of sand cores is completed.

[0016] 3. The utility model is provided with a heating component, and a second electric heating rod is added at the diverter cone position and passes through it, so that the sand core around it can be heated from the diverter cone position, reducing the influence of the thicker sand core in the middle part and the farther distance from the heating rod on the molding, so as to ensure the integrity of the sand core molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model in an overall closed state;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the utility model in an overall opened state;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the coated sand core molding component part of the utility model;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the left and right clamping components of the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the heating component part of the utility model;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the coated sand core molding component part of the utility model;

[0024] Figure 7 This is a schematic diagram of the three-dimensional structure of the long-handled coated sand core.

[0025] In the figure: 1. Sand core forming mold bottom plate; 2. Film-coated sand core forming assembly; 3. Left and right clamping assemblies; 4. Heating assembly; 201. Forming mold fixed mold; 202. First forming groove; 203. First diverter cone; 204. Heating rod insertion block; 205. Conical runner; 206. Runner top block; 207. Sand nozzle; 208. Second diverter cone; 209. Second forming groove; 210. Forming mold movable mold; 301. Fixed pillar; 302. Hydraulic push rod; 303. Moving mold connecting block; 304. Disassembly and assembly slider; 305. Fixed bolt; 306. Mold disassembly and assembly block; 307. Mold pillar; 308. Limit guide cylinder; 309. Limit guide pillar; 310. Fixed mold connecting block; 401. First electric heating rod; 402. First connecting wire; 403. Second electric heating rod; 404. Second connecting wire. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] like Figure 1 As shown, a coated sand core molding mold includes a sand core molding mold base plate 1, a coated sand core molding component 2 is arranged on the top of the sand core molding mold base plate 1, and left and right clamping components 3 are installed on the back of the coated sand core molding component 2, and a heating component 4 is installed inside the coated sand core molding component 2.

[0029] like Figure 3 and Figure 6 As shown, a coated sand core molding mold, the coated sand core molding assembly 2 includes a molding mold fixed mold 201, the molding mold fixed mold 201 is provided with a first molding groove 202, and the first molding groove 202 is provided with a first diverter cone 203, and the side of the first diverter cone 203 is fixedly connected with a heating rod insertion block 204, the top of the molding mold fixed mold 201 is provided with a conical runner 205, and the top of the conical runner 205 is integrally connected with a runner top block 206, and the conical runner 205 is provided with a sand nozzle 207, the side of the molding mold fixed mold 201 is tightly fitted with a molding mold movable mold 210, and the molding mold movable mold 210 is provided with a second molding groove 209, and the second molding groove 209 is fixedly connected with a second diverter cone 208, and the heating rod insertion block 204 penetrates The conical runner 205 is arranged inside the first diverter cone 203, and the heating rod insertion block 204 and the second diverter cone 208 form a locking structure. The conical runner 205 and the fixed mold 201 of the molding mold form a detachable structure, and the conical runner 205 and the first molding groove 202 and the second molding groove 209 all form a connecting structure. The movable mold 210 of the molding mold fits tightly with the fixed mold 201 of the molding mold, and the first molding groove 202 and the second molding groove 209 inside it can be combined to form the shape of the sand core, and then the coated sand can be injected into the molding. A conical runner 205 is arranged at the sand shooting port. After molding, it can be removed to complete the separation of the sand core body and the sand shooting flow channel. At the same time, the excess hot sand in the conical runner 205 can be taken out to prevent it from being connected to the long handle of the sand core and causing breakage when removing the mold. At the same time, it can also reduce the workload of subsequent grinding and deburring.

[0030] like Figure 4As shown, a coated sand core forming mold, the left and right clamping components 3 include fixed pillars 301, the sides of the fixed pillars 301 are installed with hydraulic push rods 302, and the ends of the hydraulic push rods 302 are fixedly connected to the movable mold connecting block 303, the inner wall of the movable mold connecting block 303 is slidably connected with a disassembly slider 304, and the end of the disassembly slider 304 is threadedly connected with a fixing bolt 305, the side of the disassembly slider 304 is fixedly connected with a mold disassembly block 306, and the other side of the mold disassembly block 306 is fixedly connected with a mold pillar 307, the outer wall of the movable mold connecting block 303 is fixedly connected with a limiting guide cylinder 308, and the inner part of the limiting guide cylinder 308 is slidably connected with a limiting guide column 309, and the end of the limiting guide column 309 is fixedly connected with a fixed mold connecting block 310, the movable mold connecting block 303 and the fixed mold connecting block 310 are arranged in parallel, and the movable mold The connecting block 303 forms a sliding structure through a limiting guide cylinder 308 and a limiting guide column 309, and the mold disassembly block 306 forms a sliding structure with the movable mold connecting block 303 through a disassembly slider 304, and the disassembly slider 304 forms a detachable structure with the movable mold connecting block 303 through a fixing bolt 305. Driven by the hydraulic push rod 302, the movable mold connecting block 303 is pushed forward, and then the movable mold 210 of the molding mold is moved forward and combined with the fixed mold 201 of the molding mold. Limiting guide cylinders 308 and limiting guide columns 309 are arranged on the side to facilitate limiting the movable mold connecting block 303 during movement, so as to ensure that the movable mold 210 of the molding mold is aligned with the fixed mold 201 of the molding mold, and disassembly sliders 304 and fixing bolts 305 are arranged to enable the molding mold to be disassembled and assembled, so as to facilitate the replacement of the mold after the production of a batch of sand cores is completed.

[0031] like Figure 5 As shown, a coated sand core molding mold, the heating component 4 includes a first electric heating rod 401, and the end of the first electric heating rod 401 is electrically connected to a first connecting wire 402, a second electric heating rod 403 is arranged on the side of the first electric heating rod 401, and the end of the second electric heating rod 403 is electrically connected to a second connecting wire 404, the shape of the second electric heating rod 403 is set to be a "7" shape, and the second electric heating rod 403 runs through the interior of the heating rod insertion block 204, and a second electric heating rod 403 is additionally provided at the diverter cone position to pass through it, so that the sand core around it can be heated from the diverter cone position, reducing the influence of the sand core in the middle part being thicker and farther away from the heating rod on the molding, so as to ensure the integrity of the sand core molding.

[0032] Working principle: First, start the hydraulic push rod 302. The end of the hydraulic push rod 302 pushes the movable mold connecting block 303 to move forward, and at the same time, it brings the limiting guide cylinder 308 to slide forward on the limiting guide column 309, and at the same time, it brings the fixed mold 201 of the forming mold to move forward until the fixed mold 201 of the forming mold and the movable mold 210 of the forming mold are attached together, and the heating rod insertion block 204 is inserted into the inside of the second diverter cone 208. Then, the conical runner 205 is inserted into the runner grooves at the top of the fixed mold 201 of the forming mold and the movable mold 210 of the forming mold. Then, the sand setting nozzle 207 is started, and the coated sand is injected into the inside of the second molding groove 209 through the sand setting nozzle 207 and the conical runner 205, and the first electric heating rod 401 and the second electric heating rod 403 are started to heat and mold the coated sand inside the forming mold;

[0033] After the molding is cooled, the hydraulic push rod 302 is started again, and its end moves backward with the movable mold connecting block 303 and the fixed mold 201 of the molding mold to open, and the conical runner 205 is pulled upward and removed, which can bring out the excess sand core inside the runner. Then the operator can gently remove the molded sand core from the movable mold 210 of the molding mold. When the production of this batch of sand cores is completed and sand cores of other shapes need to be produced, it is only necessary to take out the first electric heating rod 401 and the second electric heating rod 403 from the original mold, and then turn and unscrew the fixing bolt 305. After the restriction of the fixing bolt 305 is lost, the disassembly slider 304 can be slid to remove the mold disassembly block 306, and then the molding mold fixed at the end of the mold support 307 can be removed together, and then the mold can be replaced.

[0034] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A coated sand core forming mold, characterized in that: It comprises a sand core molding mold bottom plate (1), a coated sand core molding component (2) is arranged on the top of the sand core molding mold bottom plate (1), left and right mold clamping components (3) are installed on the back of the coated sand core molding component (2), and a heating component (4) is installed inside the coated sand core molding component (2); The coated sand core molding assembly (2) comprises a molding die fixed mold (201), a first molding groove (202) is provided inside the molding die fixed mold (201), a first diverter cone (203) is provided inside the first molding groove (202), and a heating rod insertion block (204) is fixedly connected to the side of the first diverter cone (203), a conical runner (205) is provided at the top of the molding die fixed mold (201), a runner top block (206) is integrally connected to the top of the conical runner (205), and a sand nozzle (207) is provided inside the conical runner (205), a molding die movable mold (210) is tightly fitted to the side of the molding die fixed mold (201), a second molding groove (209) is provided inside the molding die movable mold (210), and a second diverter cone (208) is fixedly connected to the inside of the second molding groove (209).

2. The coated sand core forming mold according to claim 1, characterized in that: The heating rod insertion block (204) passes through the interior of the first diverter cone (203), and the heating rod insertion block (204) and the second diverter cone (208) form a snap-fit ​​structure, the conical runner (205) and the fixed mold (201) of the molding mold form a detachable structure, and the conical runner (205) and the first molding groove (202) and the second molding groove (209) all form a connecting structure.

3. The coated sand core forming mold according to claim 1, characterized in that: The left and right clamping components (3) include fixed pillars (301), the sides of the fixed pillars (301) are equipped with hydraulic push rods (302), and the ends of the hydraulic push rods (302) are fixedly connected to a movable mold connection block (303), the inner wall of the movable mold connection block (303) is slidably connected to a disassembly slider (304), and the end of the disassembly slider (304) is threadedly connected to a fixing bolt (305), the side of the disassembly slider (304) is fixedly connected to a mold disassembly block (306), and the other side of the mold disassembly block (306) is fixedly connected to a mold pillar (307), the outer wall of the movable mold connection block (303) is fixedly connected to a limiting guide cylinder (308), and the inside of the limiting guide cylinder (308) is slidably connected to a limiting guide column (309), and the end of the limiting guide column (309) is fixedly connected to a fixed mold connection block (310).

4. The coated sand core forming mold according to claim 3, characterized in that: The movable mold connecting block (303) and the fixed mold connecting block (310) are arranged in parallel, and the movable mold connecting block (303) forms a sliding structure through a limiting guide cylinder (308) and a limiting guide column (309), and the mold disassembly block (306) forms a sliding structure with the movable mold connecting block (303) through a disassembly slider (304), and the disassembly slider (304) forms a detachable structure with the movable mold connecting block (303) through a fixing bolt (305).

5. The coated sand core forming mold according to claim 1, characterized in that: The heating component (4) comprises a first electric heating rod (401), and the end of the first electric heating rod (401) is electrically connected to a first connecting wire (402); a second electric heating rod (403) is arranged on the side of the first electric heating rod (401), and the end of the second electric heating rod (403) is electrically connected to a second connecting wire (404).

6. The coated sand core forming mold according to claim 5, characterized in that: The shape of the second electric heating rod (403) is set to be a "7" shape, and the second electric heating rod (403) runs through the interior of the heating rod insertion block (204).

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