A multipurpose water-soluble sand core mold automatic sand mixing device

Abstract

The utility model discloses a multipurpose water -soluble sand core mould automatic sand mixing device including viscose supply unit, glue unit, raw sand supply unit and mixing unit, realizes the integration process of sand mixing. The bag of viscose is opened by the knife installed on the inclined gravity tank by gravity, and the bag is smoothly broken, which is convenient and practical, and reduces the labor intensity. The glue unit separately conveys glue and water, which is convenient for controlling the addition amount. The raw sand is unpacked by the unpacking mechanism, and the knife on the bottom plate can automatically break the sand bag after the sand bag enters the hopper, reducing the labor intensity. The glue and the raw sand are mixed in the mixing barrel, and the process can be automatically controlled without human intervention, effectively improving the work efficiency and optimizing the on-site operation environment.

Description

Technical Field

[0001] This utility model relates to the field of composite material molding die manufacturing technology, and in particular to a multi-purpose water-soluble sand core mold automatic sand mixing device. Background Technology

[0002] Composite material molding dies generally include metal molds, sand core molds, plaster core molds, and rubber airbag core molds. Metal core molds have a high density and are difficult to assemble and disassemble; they can even fail to demold complex products with small openings. Rubber airbag core molds are difficult to control in terms of size, making them unsuitable for composite material products with high precision requirements. Plaster core molds have many skeleton components, and the plaster layer is brittle and prone to cracking. In contrast, sand core molds, due to their water solubility, easy demolding, low cost, high compressive strength, and machinability, are receiving increasing attention not only in filament winding but also in resin transfer molding, vacuum-assisted resin infusion, hand lay-up, and spray molding processes.

[0003] The raw materials used to make sand core molds include quartz sand, adhesive (mainly polyvinyl alcohol), and water. The process involves first preparing an aqueous solution of the adhesive, then thoroughly mixing the solution with the quartz sand, and allowing it to dry before use. The preparation process is complex and time-consuming, and the adhesive solution typically requires heating to dissolve, resulting in a harsh on-site operating environment. Utility Model Content

[0004] In view of this, the present invention aims to provide a multi-purpose automatic sand mixing device for water-soluble sand core molds to solve the above problems.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A multi-purpose automatic sand mixing device for water-soluble sand core molds, comprising:

[0007] The adhesive feeding unit is used to grab and open the material bags, and simultaneously feed the material into the adhesive making unit; it includes a mounting column, a robot arm, and a bag opening machine. The robot arm is mounted on the mounting column, and the bag opening machine is located below the robot arm; the bag opening machine includes a placement platform, a gravity trough, and a first hopper arranged sequentially from high to low on the support. The gravity trough is inclined between the placement platform and the first hopper, and the surface of the gravity trough is provided with a first bag opening knife;

[0008] The glue-making unit is used to prepare glue solution, including a silo, a mixing tank and a glue reaction vessel. The inlet of the silo is connected to the bottom of the first hopper, and the outlet of the silo is connected to the inlet of the mixing tank through a screw conveyor. The mixing tank is also connected to a water inlet pipe and is connected to the glue reaction vessel.

[0009] The raw sand feeding unit is used to unpack the sand and feed the material into the mixing unit. It includes a second hopper, a feeding control mechanism, a Z-type bucket elevator, and a connecting channel. The feeding control mechanism is located at the bottom of the second hopper, and the bottom of the second hopper is also connected to the connecting channel. The outlet of the connecting channel is connected to the inlet of the Z-type bucket elevator. The feeding control mechanism includes a first bottom plate, a second bottom plate, and a drive assembly. The first bottom plate and the second bottom plate are set at the bottom of the second hopper in a split manner. Both the first bottom plate and the second bottom plate are equipped with a second bag-opening knife. The drive assembly is set on the second hopper and connected to the first bottom plate and the second bottom plate to control the opening of the first bottom plate and the second bottom plate.

[0010] The mixing unit is used to mix adhesive and raw sand. It includes a mixing tank, a stirring motor, and a stirring paddle. The top of the mixing tank is equipped with an adhesive inlet and a raw sand inlet. The adhesive inlet is connected to the adhesive preparation unit, and the raw sand inlet is connected to the raw sand supply unit. The mixing tank is equipped with a stirring paddle, which is driven by the stirring motor. The side of the mixing tank is equipped with a molding sand outlet.

[0011] Furthermore, the bag-opening machine also includes a pressure roller, a connecting rod, and a tension spring. The pressure roller is positioned across the lower middle part of the gravity groove, and connecting rods are hinged to both ends of the pressure roller. The connecting rods are also hinged to the outer wall of the gravity groove. A tension spring is also connected to the end of the pressure roller, and the tension spring is also connected to the outer wall of the gravity groove. The first bag-opening knife is positioned below the pressure roller.

[0012] Furthermore, a protective cover is installed directly above the pressure roller, and the protective cover is fixed to the outer wall of the gravity groove.

[0013] Furthermore, tension springs are connected to both ends of the pressure roller.

[0014] Furthermore, the drive assembly includes a first hinge rod, a second hinge rod, a central hinge rod, a rotating rod, and a handle. The rotating rod is rotatably positioned at the center of the bottom of the second hopper. A first base plate and a second base plate are respectively positioned on both sides of the rotating rod. The ends of the first base plate and the second base plate that are relatively far apart pass through the side wall of the second hopper and extend beyond the second hopper, while being connected to the first hinge rod and the second hinge rod respectively. One end of the rotating rod extends beyond the second hopper, and a central hinge rod is fixedly sleeved on the rotating rod extending beyond the second hopper. The first hinge rod and the second hinge rod are respectively hinged to the central hinge rod. A handle is also provided on the rotating rod.

[0015] Furthermore, the second bag-opening knife is located on the side where the first base plate and the second base plate are close to each other.

[0016] Furthermore, a valve is installed at the bottom outlet of the silo.

[0017] Furthermore, the adhesive preparation unit also includes an adhesive storage tank, which is connected to both the adhesive reaction vessel and the mixing tank.

[0018] Compared with existing technologies, the multi-purpose water-soluble sand core mold automatic sand mixing device of this utility model has the following advantages:

[0019] This utility model describes a multi-purpose automatic sand mixing device for water-soluble sand core molds, comprising an adhesive feeding unit, an adhesive preparation unit, a raw sand feeding unit, and a mixing unit, achieving an integrated sand mixing process. The adhesive bag opening mechanism utilizes gravity to allow the adhesive bag to pass through a blade mounted on an inclined gravity trough, facilitating easy and practical operation and reducing labor intensity. In the adhesive preparation unit, the delivery of adhesive and water is controlled separately, facilitating control of their respective addition amounts. The raw sand bag is opened using a bag-opening mechanism; after the sand bag enters the hopper, the blades on the bottom plate automatically open the bag, further reducing labor intensity. The adhesive and raw sand are mixed in a mixing tank; the process can be automatically controlled without human intervention, effectively improving work efficiency and optimizing the on-site operating environment. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the multi-purpose water-soluble sand core mold automatic sand mixing device described in this embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the adhesive feeding unit described in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the bag-opening machine described in an embodiment of the present utility model;

[0024] Figure 4 This is a partial enlarged view of the bag-opening machine described in an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the raw sand feeding unit described in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the material feeding control mechanism described in an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the mixing unit described in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the adhesive-making unit described in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the silo described in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Adhesive feeding unit; 1-1. Mounting column; 1-2. Robotic arm; 1-3. Bag opening machine; 1-31. Placement platform; 1-32. Gravity trough; 1-33. Protective cover; 1-34. Pressure roller; 1-35. First bag opening knife; 1-36. First hopper; 1-37. Support frame; 1-38. Connecting rod; 1-39. Tension spring;

[0032] 2. Raw sand feeding unit; 2-1. Second hopper; 2-2. Discharge control mechanism; 2-21. First bottom plate; 2-22. Second bottom plate; 2-23. First hinge rod; 2-24. Second hinge rod; 2-25. Central hinge rod; 2-26. Rotating rod; 2-27. Handle; 2-28. Second bag opening knife; 2-3. Z-type bucket elevator; 2-4. Connecting channel;

[0033] 3. Mixing unit; 3-1. Mixing tank; 3-2. Adhesive inlet; 3-3. Raw sand inlet; 3-4. Agitator motor; 3-5. Agitator paddle; 3-6. Molding sand outlet;

[0034] 4. Adhesive making unit; 4-1. Material hopper; 4-11. Inlet; 4-2. Valve; 4-3. Screw conveyor; 4-4. Mixing tank; 4-5. Water inlet pipe; 4-6. Adhesive reaction vessel; 4-7. Adhesive storage tank. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] like Figure 1 As shown, a multi-purpose water-soluble sand core mold automatic sand mixing device includes:

[0040] The adhesive feeding unit 1 is used to grab and open the material bags, and simultaneously feed the material into the adhesive making unit 4. It includes a mounting column 1-1, a robot arm 1-2, and a bag opening machine 1-3. The robot arm 1-2 is mounted on the mounting column 1-1, and the bag opening machine 1-3 is located below the robot arm 1-2. The bag opening machine 1-3 includes a placement platform 1-31, a gravity trough 1-32, and a first hopper 1-36 arranged sequentially from high to low on a support 1-37. The gravity trough 1-32 is inclined between the placement platform 1-31 and the first hopper 1-36, and a first bag opening knife 1-35 is provided on the surface of the gravity trough 1-32. The material bags are accelerated in the inclined gravity trough by gravity conveying. When the material bags pass the first bag opening knife in the trough, the contact process between the material bags and the blades utilizes gravity impact to quickly open the bags. Finally, the opened material bags are lifted manually, and the adhesive PVA is poured into the hopper.

[0041] The robotic arm can employ a commonly used structure from existing technologies to assist manual handling of the adhesive PVA from the material tray to the bag-opening machine. Specifically, a pneumatically assisted robotic arm with a pneumatic suction cup at its end is used. During handling, the operator guides the end of the robotic arm above the material tray, manually controls the suction cup to grab the bag, and then manually guides the bag to the bag-opening machine. The suction cup is then opened, and the bag is placed on the bag-opening machine for unpacking.

[0042] For example, the bag-opening machine 1-3 may also include a pressure roller 1-34, a connecting rod 1-38, and a tension spring 1-39. The pressure roller 1-34 is arranged across the lower middle part of the gravity groove 1-32. The two ends of the pressure roller 1-34 are respectively hinged to the connecting rod 1-38, and the connecting rod 1-38 is also hinged to the outer side wall of the gravity groove 1-32. The end of the pressure roller 1-34 is also connected to the tension spring 1-39, which is also connected to the outer side wall of the gravity groove 1-32. The first bag-opening knife 1-35 is arranged below the pressure roller 1-34.

[0043] Specifically, a protective cover 1-33 is provided directly above the pressure roller 1-34, and the protective cover 1-33 is fixed on the outer wall of the gravity groove 1-32.

[0044] Specifically, tension springs 1-39 are connected to both ends of the pressure rollers 1-34.

[0045] The pressure roller can hold down the bag when it is broken, assisting in the breaking process and improving the effectiveness and efficiency of the breaking. The protective cover prevents the material from scattering when the bag is broken.

[0046] The bottom of the hopper is designed with a grid structure to prevent debris such as material bags from entering the hopper.

[0047] The raw sand feeding unit 2 is used to unpack the sand and feed the material into the mixing unit 3. It includes a second hopper 2-1, a feeding control mechanism 2-2, a Z-type bucket elevator 2-3, and a connecting channel 2-4. The feeding control mechanism 2-2 is located at the bottom of the second hopper 2-1, and the connecting channel 2-4 is also connected to the bottom of the second hopper 2-1. The outlet of the connecting channel 2-4 is connected to the inlet of the Z-type bucket elevator 2-3. The feeding control mechanism 2-2 includes a first bottom plate 2-21, a second bottom plate 2-22, and a drive assembly. The first bottom plate 2-21 and the second bottom plate 2-22 are arranged in a split configuration at the bottom of the second hopper 2-1. A second bag-opening knife 2-28 is provided on both the first bottom plate 2-21 and the second bottom plate 2-22. The drive assembly is located on the second hopper 2-1 and connected to the first bottom plate 2-21 and the second bottom plate 2-22, used to control the opening of the first bottom plate 2-21 and the second bottom plate 2-22. The Z-type bucket elevator can be an existing conventional device.

[0048] The overhead crane is manually operated to lift sandbags and place them into the second hopper. The second bag-opening cutter in the second hopper cuts the sandbags open by their own weight. The cap is then manually opened, and the sandbags automatically expand. The raw sand inside the bags flows into the connecting channel through the gravity channel and enters the Z-type bucket elevator. Finally, the raw sand is sent to the mixing unit by the Z-type bucket elevator.

[0049] Specifically, the drive assembly includes a first hinge rod 2-23, a second hinge rod 2-24, a central hinge rod 2-25, a rotating rod 2-26, and a handle 2-27. The rotating rod 2-26 is rotatably positioned at the center of the bottom of the second hopper 2-1. A first base plate 2-21 and a second base plate 2-22 are respectively positioned on both sides of the rotating rod 2-26. The ends of the first base plate 2-21 and the second base plate 2-22 that are relatively far apart pass through the side wall of the second hopper 2-1 and extend beyond the second hopper 2-1, while being connected to the first hinge rod 2-23 and the second hinge rod 2-24 respectively. One end of the rotating rod 2-26 extends beyond the second hopper 2-1, and the central hinge rod 2-25 is fixedly sleeved on the rotating rod 2-26 extending beyond the second hopper 2-1. The first hinge rod 2-23 and the second hinge rod 2-24 are respectively hinged to the central hinge rod 2-25. The rotating rod 2-26 is also provided with a handle 2-27.

[0050] Specifically, the second bag-opening knife 2-28 is located on the side of the first base plate 2-21 and the second base plate 2-22 that are close to each other.

[0051] When the sandbag falls into the second hopper, the bottom of the second hopper is designed with two bottom plates, and the second bag-opening knife is installed on the plates. When the sandbag descends to the knife, the knife inserts into the bottom of the sandbag due to the weight of the sandbag. The handle is manually turned, and the handle opens the bottom plate through the first hinge rod, the second hinge rod, and the central hinge rod, which drives the second bag-opening knife to tear open the bottom of the sandbag. The raw sand automatically flows out of the hopper and enters the connecting channel.

[0052] The adhesive preparation unit 4 is used to prepare adhesive solution, including a silo 4-1, a mixing tank 4-4, and an adhesive reaction vessel 4-6. The inlet 4-11 of the silo 4-1 is connected to the bottom of the first hopper 1-36. The outlet of the silo 4-1 is connected to the inlet of the mixing tank 4-4 through a screw conveyor 4-3. The mixing tank 4-4 is also connected to a water inlet pipe 4-5. The mixing tank 4-4 is connected to the adhesive reaction vessel 4-6. A valve 4-2 is provided at the bottom outlet of the silo 4-1.

[0053] Water is added to the mixing tank through the inlet pipe, and adhesive is added to the mixing tank through the hopper. A flow meter can be installed on the inlet pipe to control the water volume, and a weighing module, such as a flow meter, can also be installed at the outlet of the hopper to control the addition of adhesive.

[0054] For example, the glue-making unit 4 may also include a glue storage tank for storing glue, and the glue storage tank is connected to the glue reaction vessel 4-6 and the mixing tank 3-1 respectively.

[0055] The mixing unit 3 is used to mix the adhesive and raw sand. It includes a mixing tank 3-1, a stirring motor 3-4, and a stirring paddle 3-5. The top of the mixing tank 3-1 is provided with an adhesive inlet 3-2 and a raw sand inlet 3-3. The adhesive inlet 3-2 is connected to the adhesive preparation unit 4, and the raw sand inlet 3-3 is connected to the raw sand feeding unit 2. The mixing tank 3-1 is equipped with a stirring paddle 3-5, which is driven by the stirring motor 3-4. The side of the mixing tank 3-1 is provided with a molding sand outlet 3-6.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-purpose automatic sand mixing device for water-soluble sand core molds, characterized in that: include: The adhesive feeding unit is used to grab the material bag and open the bag, while feeding the material into the adhesive making unit. It includes a mounting column, a robotic arm, and a bag-opening machine. The robotic arm is mounted on the mounting column, and the bag-opening machine is located below the robotic arm. The bag-opening machine includes a placement platform, a gravity trough, and a first hopper arranged sequentially on a support from high to low. The gravity trough is inclined between the placement platform and the first hopper, and the surface of the gravity trough is provided with a first bag-opening knife. The glue-making unit is used to prepare glue solution, including a silo, a mixing tank and a glue reaction vessel. The inlet of the silo is connected to the bottom of the first hopper, and the outlet of the silo is connected to the inlet of the mixing tank through a screw conveyor. The mixing tank is also connected to a water inlet pipe and is connected to the glue reaction vessel. The raw sand feeding unit is used to unpack the sand and feed the material into the mixing unit. It includes a second hopper, a feeding control mechanism, a Z-type bucket elevator, and a connecting channel. The feeding control mechanism is located at the bottom of the second hopper, and the bottom of the second hopper is also connected to the connecting channel. The outlet of the connecting channel is connected to the inlet of the Z-type bucket elevator. The feeding control mechanism includes a first bottom plate, a second bottom plate, and a drive assembly. The first bottom plate and the second bottom plate are set at the bottom of the second hopper in a split manner. Both the first bottom plate and the second bottom plate are equipped with a second bag-opening knife. The drive assembly is set on the second hopper and connected to the first bottom plate and the second bottom plate to control the opening of the first bottom plate and the second bottom plate. The mixing unit is used to mix adhesive and raw sand. It includes a mixing tank, a stirring motor, and a stirring paddle. The top of the mixing tank is equipped with an adhesive inlet and a raw sand inlet. The adhesive inlet is connected to the adhesive preparation unit, and the raw sand inlet is connected to the raw sand supply unit. The mixing tank is equipped with a stirring paddle, which is driven by the stirring motor. The side of the mixing tank is equipped with a molding sand outlet.

2. The multi-purpose water-soluble sand core mold automatic sand mixing device according to claim 1, characterized in that: The bag-opening machine also includes a pressure roller, a connecting rod, and a tension spring. The pressure roller is positioned across the lower middle part of the gravity groove. Connecting rods are hinged to both ends of the pressure roller, and the connecting rods are also hinged to the outer wall of the gravity groove. A tension spring is also connected to the end of the pressure roller, and the tension spring is also connected to the outer wall of the gravity groove. The first bag-opening knife is positioned below the pressure roller.

3. The multi-purpose water-soluble sand core mold automatic sand mixing device according to claim 2, characterized in that: A protective cover is also installed directly above the pressure roller, and the protective cover is fixed to the outer wall of the gravity groove.

4. The multi-purpose water-soluble sand core mold automatic sand mixing device according to claim 2, characterized in that: Both ends of the pressure roller are connected to tension springs.

5. The multi-purpose water-soluble sand core mold automatic sand mixing device according to claim 1, characterized in that: The drive assembly includes a first hinge rod, a second hinge rod, a central hinge rod, a rotating rod, and a handle. The rotating rod is rotatably positioned at the center of the bottom of the second hopper. A first base plate and a second base plate are respectively positioned on both sides of the rotating rod. The ends of the first base plate and the second base plate that are relatively far apart pass through the side wall of the second hopper and extend beyond the second hopper, while being connected to the first hinge rod and the second hinge rod respectively. One end of the rotating rod extends beyond the second hopper, and a central hinge rod is fixedly sleeved on the rotating rod extending beyond the second hopper. The first hinge rod and the second hinge rod are respectively hinged to the central hinge rod. A handle is also provided on the rotating rod.

6. The multi-purpose water-soluble sand core mold automatic sand mixing device according to claim 5, characterized in that: The second bag-opening knife is located on the side where the first and second base plates are close to each other.

7. The multi-purpose water-soluble sand core mold automatic sand mixing device according to claim 1, characterized in that: A valve is installed at the bottom outlet of the silo.

8. The multi-purpose water-soluble sand core mold automatic sand mixing device according to claim 1, characterized in that: The glue preparation unit also includes a glue storage tank, which is connected to the glue reaction vessel and the mixing tank.

Images