Miniature integrated resin sand core-making continuous sand mixer

Abstract

The utility model relates to a miniature integrated resin sand core-making continuous sand mixer which comprises a mounting frame, a sand hopper, a flow curtain type air separator and a sand mixing arm, the sand hopper is fixedly arranged on the mounting frame; the flow curtain type winnowing device comprises a box body and a plurality of flow curtain type winnowing plates, a first inlet, a first outlet, an air inlet and an air suction opening are formed in the box body, the first inlet is connected with a bottom outlet of the sand hopper, and a dust remover is arranged at the air suction opening; the multiple flow curtain type winnowing plates are distributed on the two opposite sides in the box body in an up-down staggered mode, and every two adjacent flow curtain type winnowing plates on the two opposite sides form a V-shaped structure. And the sand mixing arm is mounted on the mounting frame and is provided with a second inlet, a second outlet and a liquid material feeding port. By adopting the sand mixer, dust in dried sand can be removed during working, the adding amount of resin and a curing agent is reduced, the strength of a sand mold is improved, the cost is saved, the waste is reduced, the harm of dust and smell to the body of a worker during sand mixing is overcome, the labor intensity is reduced, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to resin sand core making equipment technical field, concretely relates to a micro integrated type resin sand core making continuous sand mixer. BACKGROUND

[0002] In the process of foundry molding operation, sand core is an important means for realizing casting and is an indispensable production process, and the volume of sand core is also getting smaller in the production process of small and medium-sized castings. According to the process requirements, the sand core can be a coated sand core or a resin sand core. For the production of small resin sand cores, manual mixing of sand or the use of bowl-type sand mixers is high in labor intensity and has certain safety hazards. UTILITY MODEL CONTENTS

[0003] The utility model aims at overcoming the defects of the prior art, and provides a micro integrated type resin sand core making continuous sand mixer, which solves the technical problems of high labor intensity and safety hazards in the production process of small resin sand cores.

[0004] In order to solve the above problems, the technical scheme of the utility model is as follows: a micro integrated type resin sand core making continuous sand mixer, comprising:

[0005] a mounting frame;

[0006] a sand hopper fixedly arranged on the mounting frame;

[0007] a flow curtain type air separator, comprising a box body and a plurality of flow curtain type air separation plates, a first inlet, a first outlet, an air inlet and an air suction port are formed on the box body, the first inlet is located at the upper part of the flow curtain type air separator, the first inlet is connected with the bottom outlet of the sand hopper, the first outlet is located at the lower part of the flow curtain type air separator, the air inlet and the air suction port are located on opposite sides of the box body, and a dust collector is arranged at the air suction port; the plurality of flow curtain type air separation plates are distributed on opposite sides of the box body in a staggered manner, adjacent two flow curtain type separation plates on opposite sides form a V-shaped structure, and the lower ends of the plurality of flow curtain type air separation plates are distributed on the center of the box body in a staggered manner, so that the sand in the box body flows from top to bottom through the plurality of flow curtain type air separation plates and then flows out from the first outlet due to gravity;

[0008] a sand mixing arm installed on the mounting frame, the sand mixing arm has a second inlet, a second outlet and a liquid material adding port; the second inlet is connected with the first outlet of the flow curtain type air separator, the second outlet is used for discharging, the liquid material adding port has two for adding resin and catalyst respectively; and the sand mixing arm is used for stirring the sand, resin and catalyst uniformly and then conveying them to the next position.

[0009] Preferably, the mounting frame is a hoisting support.

[0010] Preferably, the sand mixing arm comprises:

[0011] shell;

[0012] A rotating shaft is rotatably installed inside the housing; the rotating shaft includes a propulsion section and a mixing section, with helical blades arranged on the outer periphery of the propulsion section and sand-mixing blades fixedly arranged on the outer periphery of the mixing section.

[0013] The drive motor is mounted on the housing, and the motor shaft of the drive motor is coaxially and fixedly connected to the rotating shaft.

[0014] Preferably, the outer shell has a cylindrical structure, and the second inlet and the second outlet are located near the opposite ends of the outer shell, with the second inlet located near the material conveying start of the propulsion section.

[0015] Preferably, the liquid inlet is located in the mixing section.

[0016] Preferably, it also includes an integrated electrical control cabinet, which has an integrated PLC control system, and the integrated PLC control system is electrically connected to the drive motor.

[0017] Preferably, a pneumatic liquid valve is installed at the liquid inlet, the pneumatic liquid valve is connected to the liquid pump, and both the pneumatic liquid valve and the liquid pump are electrically connected to the integrated PLC control system.

[0018] Preferably, a metering valve is installed at the bottom outlet of the sand hopper, and the metering valve is electrically connected to the integrated PLC control system.

[0019] Preferably, the sand-mixing blade includes forward-rotating blades and reverse-rotating blades distributed in the mixing section.

[0020] Preferably, the height of the sand mixer is 3300mm, the molding working height is 1172mm, the working radius is 1600mm, and the working range is 270°.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] The sand mixer of this invention can improve production efficiency, ensure the quality of sand cores, and at the same time significantly reduce the labor intensity of workers and eliminate the health hazards of toxic gases generated during the resin sand mixing process to operators. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the sand mixer in the embodiment;

[0024] Figure 2 This is a schematic diagram of the external shape of the curtain-type air separator in the embodiment;

[0025] Figure 3 This is a schematic diagram of the internal structure of the flow curtain air separator in the embodiment;

[0026] Figure 4This is a schematic diagram of the interior of the sand mixing arm in the embodiment.

[0027] Reference numerals: 1. Mounting frame; 2. Sand hopper; 3. Flow curtain type air separator; 31. Housing; 311. First inlet; 312. First outlet; 313. Air inlet; 314. Air suction port; 32. Flow curtain type air separator plate; 4. Sand mixing arm; 41. Second inlet; 42. Second outlet; 43. Liquid material inlet; 44. Outer shell; 45. Rotating shaft; 451. Propulsion section; 452. Spiral blade; 453. Mixing section; 454. Sand mixing blade; 46. Drive motor; 5. Integrated electrical control cabinet; 6. Metering valve. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0029] Example: Figures 1-4 As shown, this embodiment discloses a miniature integrated resin sand core-making continuous sand mixer, including a mounting frame 1, a sand hopper 2, a flow curtain air separator 3, and a mixing arm 4. The sand hopper 2 is fixedly mounted on the mounting frame 1; the flow curtain air separator 3 includes a housing 31 and several flow curtain air separator plates 32. The housing 31 has a first inlet 311, a first outlet 312, an air inlet 313, and an air suction port 314. The first inlet 311 is located at the upper part of the flow curtain air separator 3 and is connected to the bottom outlet of the sand hopper 2. The first outlet 312 is located at the lower part of the flow curtain air separator 3. The air inlet 313 and the air suction port 314 are located on opposite sides of the housing 31, and a dust collector is installed at the air suction port 314; several flow curtain air separator plates 32 are staggered and distributed on opposite sides of the housing 31, with adjacent plates on opposite sides... The flow curtain separation plate forms a V-shaped structure. The lower ends of several flow curtain air separation plates 32 are distributed vertically in the center of the box 31 so that the sand in the box 31 flows from top to bottom through several flow curtain air separation plates 32 due to gravity and then flows out from the first outlet 312. The sand mixing arm 4 is installed on the mounting frame 1. The sand mixing arm 4 has a second inlet 41, a second outlet 42 and a liquid inlet 43. The second inlet 41 is connected to the first outlet 312 of the flow curtain air separator 3. The second outlet 42 is used for discharging material. There are two liquid inlets 43, which are used for adding resin and catalyst respectively. The sand mixing arm 4 is used to mix the sand, resin and catalyst evenly and then transport them to the next position.

[0030] With the above configuration, the flow curtain air separator 3 has staggered flow curtain air separator plates 32 inside. When sand falls from the first inlet 311 of the housing 31 onto the first flow curtain air separator plate 32, the sand spreads out in an S-shape and flows downwards naturally. During the flow, a dust collector draws in air through the suction port 314, and fresh air is supplied through the air inlet 313 to form an airflow. Fine dust particles smaller than 200 mesh in the sand that are not useful for molding are sucked away by the dust collector. Sand that has been air-separated by the flow curtain air separator 3 has significantly improved core compactness and material utilization rate because there is no dust consuming resin and catalyst. In operation, the flow curtain air separator 3 can remove dust from the dried sand, reduce the amount of resin and curing agent added, improve the sand mold strength, save costs, reduce waste, overcome the harm of dust and odor to workers' health during sand mixing, reduce labor intensity, and improve work efficiency.

[0031] This embodiment of a miniature integrated resin sand core-making continuous mixing machine has a production efficiency of 3t / H, an overall height of 3300mm, a molding working height of 1172mm, a working radius of 1600mm, and a working range of 270°. The working height is the distance from the sand outlet of the mixing machine to the ground; molding operations can be performed within this height range.

[0032] This embodiment of a miniature integrated resin sand core making continuous mixing machine can be applied to castings weighing about 2 kg and sand cores weighing about 0.15 kg.

[0033] In this embodiment of a miniature integrated resin sand core-making continuous sand mixer, the mounting frame 1 is a hoisting bracket. With this configuration, the sand hopper 2, the flow curtain air separator 3, and the mixing arm 4 are all mounted on the hoisting bracket. The sand mixer has an integrated, mobile structure, allowing for easy hoisting and relocation of the machine to different work sites as needed.

[0034] In a micro integrated resin sand core-making continuous sand mixer of this embodiment, the sand mixing arm 4 includes a housing 44, a rotating shaft 45, and a drive motor 46. The rotating shaft 45 is rotatably installed inside the housing 44. The rotating shaft 45 includes a propulsion section 451 and a mixing section 453. The outer periphery of the propulsion section 451 is provided with spiral blades 452, and the outer periphery of the mixing section 453 is fixedly provided with sand mixing blades 454. The drive motor 46 is installed on the housing 44, and the motor shaft of the drive motor 46 is coaxially and fixedly connected to the rotating shaft 45.

[0035] With the above configuration, the drive motor 46 drives the rotating shaft 45 to rotate, thereby driving the spiral blade 452 of the propulsion section 451 to rotate, and at the same time driving the sand mixing blade 454 of the mixing section 453 to rotate. The spiral blade 452 of the propulsion section 451 rotates to push the material, and the sand mixing blade 454 of the mixing section 453 rotates to mix the material evenly.

[0036] In this embodiment of a micro integrated resin sand core making continuous sand mixer, the outer shell 44 is a cylindrical structure, the second inlet 41 and the second outlet 42 are respectively close to the opposite ends of the outer shell 44, and the second inlet 41 is close to the material conveying start end of the propulsion section 451.

[0037] With this setup, sand enters the mixing arm 4 of the sand mixer through the first outlet 312 of the flow curtain air separator 3. There is a propulsion section 451 at the inlet of the mixing arm 4. The propulsion section 451 can uniformly deliver the sand to the mixing section 453 with the mixing blades 454 through the rotating spiral blades 452. The drive motor 46 rotates and drives the mixing blades to mix the sand, resin and catalyst evenly before discharging them from the mixing arm 4, thus ending the workflow.

[0038] In this embodiment of a micro integrated resin sand core-making continuous mixer, the liquid inlet 43 is located at the mixing section 453. With this configuration, the resin and catalyst fall into the mixing section 453 after passing through the liquid inlet 43, and under the action of the mixing blades 454, the resin, catalyst, and sand are mixed evenly.

[0039] In this embodiment of a miniature integrated resin sand core-making continuous mixing machine, there is also an integrated electrical control cabinet 5, which has an integrated PLC control system. The integrated PLC control system is electrically connected to the drive motor 46. Preferably, the integrated PLC control system has a one-button start / stop function, and the equipment is equipped with a safety interlock function. When the safety device is removed during power-on, the alarm device automatically interlocks and cannot be started.

[0040] In this embodiment of a miniature integrated resin sand core-making continuous mixer, a pneumatic liquid material valve is installed at the liquid material inlet 43. The pneumatic liquid material valve is connected to a liquid material pump, and both the pneumatic liquid material valve and the liquid material pump are electrically connected to an integrated PLC control system. This configuration enables automatic liquid material addition, with the amount and timing of addition controlled by the integrated PLC control system. Preferably, the system can be configured to add resin first, opening the pneumatic liquid material valve upon addition, followed by a 3-second delay before adding the catalyst. The amount added is controlled by a frequency converter that adjusts the pump speed.

[0041] In this embodiment of a miniature integrated resin sand core-making continuous mixing machine, the mixing arm 4 is mounted on the integrated electrical control cabinet 5 through a rotary support mechanism, which has a simple structure and saves space.

[0042] In this embodiment of a miniature integrated resin sand core-making continuous sand mixer, a metering valve 6 is installed at the bottom outlet of the sand hopper 2 and at the first outlet 312 of the flow curtain air separator 3. The metering valve 6 is electrically connected to the integrated PLC control system. The amount of sand added is determined by the opening degree of the metering cylinder control valve 6, and is generally measured in 30-second time units.

[0043] In this embodiment of a micro-integrated resin sand core-making continuous mixer, the mixing blades 454 include forward-rotating blades and reverse-rotating blades distributed in the mixing section 453. This arrangement, with some blades moving in the opposite direction, increases the mixing time of the sand and liquid, thereby achieving a better mixing effect.

Claims

1. A micro integrated resin sand core continuous sand mixer characterized by, The sand mixing device comprises a mounting frame (1), a sand hopper (2) fixedly arranged on the mounting frame (1), a curtain air separator (3) comprising a box body (31) and a plurality of curtain air separation plates (32), a first inlet (311) and a first outlet (312) are arranged on the box body (31), an air inlet (313) and an air suction port (314) are arranged on opposite sides of the box body (31), a dust collector is arranged at the air suction port (314), the first inlet (311) is arranged at the upper portion of the curtain air separator (3) and is connected with the bottom outlet of the sand hopper (2), the first outlet (312) is arranged at the lower portion of the curtain air separator (3), the air inlet (313) and the air suction port (314) are arranged on the opposite sides of the box body (31), the adjacent two curtain air separation plates on the opposite sides form a V-shaped structure, the lower ends of the plurality of curtain air separation plates (32) are distributed on the central portion of the box body (31) to make the sand in the box body (31) flow from top to bottom through the plurality of curtain air separation plates (32) and then flow out from the first outlet (312), a sand mixing arm (4) is arranged on the mounting frame (1), the sand mixing arm (4) is provided with a second inlet (41), a second outlet (42) and liquid material adding ports (43), the second inlet (41) is connected with the first outlet (312) of the curtain air separator (3), the second outlet (42) is used for discharging materials, the liquid material adding ports (43) are used for adding resin and catalyst respectively, and the sand mixing arm (4) is used for stirring the sand, the resin and the catalyst uniformly and then conveying the sand to a next position. The mounting frame (1) is a hoisting support. The sand mixing arm (4) comprises an outer shell (44), a rotating shaft (45) rotatably arranged in the outer shell (44), the rotating shaft (45) comprising a propelling section (451) and a mixing section (453), a plurality of helical blades (452) are arranged on the outer periphery of the propelling section (451), a plurality of sand mixing blades (454) are fixedly arranged on the outer periphery of the mixing section (453), a driving motor (46) is arranged on the outer shell (44) and is coaxially and fixedly connected with the rotating shaft (45). The outer shell (44) is in a cylindrical structure, the second inlet (41) and the second outlet (42) are arranged close to the opposite ends of the outer shell (44), and the second inlet (41) is arranged close to the material conveying start end of the propelling section (451). The liquid material adding ports (43) are arranged at the mixing section (453).

2. A micro integrated resin sand core continuous sand mixer according to claim 1, characterized in that, An integrated electrical control cabinet (5) is further arranged, the integrated electrical control cabinet (5) is provided with an integrated PLC control system, and the integrated PLC control system is electrically connected with the driving motor (46).

3. A micro integrated resin sand core continuous sand mixer according to claim 1, characterized in that, A pneumatic liquid valve is arranged at the liquid material adding ports (43), the pneumatic liquid valve is connected with a liquid pump, and the pneumatic liquid valve and the liquid pump are electrically connected with the integrated PLC control system. A quantitative valve (6) is arranged at the bottom outlet of the sand hopper (2), and the quantitative valve (6) is electrically connected with the integrated PLC control system. The sand mixing blades (454) comprise forward rotating blades and reverse rotating blades arranged on the mixing section (453). ​ 4. A micro integrated resin sand core continuous sand mixer according to claim 3, characterized in that, ​ 5. A micro integrated resin sand core continuous sand mixer according to claim 3, wherein ​ 6. A micro integrated resin sand core continuous sand mixer according to claim 3, wherein ​ 7. A micro integrated resin sand core continuous sand mixer according to claim 6, characterized in that, ​ 8. A micro integrated resin sand core continuous sand mixer according to claim 6, characterized in that, ​ 9. A micro integrated resin sand core continuous sand mixer according to claim 3, characterized in that, ​ 10. A micro integrated resin sand core continuous sand mixer according to claim 1, wherein, The height of the sand mixer is 3300 mm, the molding working height is 1172 mm, the working radius is 1600 mm, and the working range is 270°.

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