Sand mixing device and core making equipment

Abstract

The utility model relates to the technical field of core making equipment, in particular to a sand mixing device and core making equipment. The sand mixing device comprises a sand mixing cylinder, a support and a plurality of weighing sensors, the sand mixing cylinder is arranged on the support, and the weighing sensors are arranged at the bottom of the sand mixing cylinder and connected between the sand mixing cylinder and the support. According to the sand mixing device, the weighing sensor is arranged at the bottom of the sand mixing cylinder, the weight of sand in the sand mixing cylinder can be obtained in real time in the process that the sand enters the sand mixing cylinder, a traditional weighing hopper connected between the sand storage box and the sand mixing cylinder is omitted, and therefore the occupied space is reduced, the overall structure is simplified, and the production cost is reduced. The device is suitable for occasions with limited space, and has the advantages of low cost, convenience in operation and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of core making equipment, in particular to a sand mixing device and a core making equipment. Background Art

[0002] In the process of core sand preparation, sand needs to be mixed with binders, curing agents or other additives in a certain proportion. Existing sand mixing devices usually include a sand storage tank, a weighing hopper and a sand mixing cylinder arranged in sequence from top to bottom, and a weighing sensor is arranged on the weighing hopper. When mixing sand with the existing sand mixing device, first, the discharge valve at the bottom of the sand storage tank is opened, and the sand material enters the weighing hopper under the action of gravity until the weighing sensor measures that the weight of the sand material in the weighing hopper reaches the set value; then, the discharge valve at the bottom of the weighing hopper is opened, and the sand material enters the sand mixing cylinder under the action of gravity.

[0003] Due to the setting of the weighing hopper, the existing sand mixing device has a large overall volume and a complex structure, and cannot be applied to occasions with limited space. Summary of the Utility Model

[0004] The first object of the utility model is to provide a sand mixing device to solve the technical problem that the existing sand mixing device has a large overall volume and a complex structure and cannot be applied to occasions with limited space.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A sand mixing device includes a sand mixing cylinder, a bracket and a plurality of weighing sensors. Among them, the sand mixing cylinder is arranged on the bracket, and the weighing sensors are arranged at the bottom of the sand mixing cylinder and connected between the sand mixing cylinder and the bracket.

[0007] Further, the number of the weighing sensors is multiple and they are distributed around the axis of the sand mixing cylinder.

[0008] Further, the bracket includes a plurality of legs, and one weighing sensor is arranged between each leg and the sand mixing cylinder.

[0009] Further, it further includes a cylinder mounting seat, the sand mixing cylinder is mounted on the cylinder mounting seat, and the weighing sensor is connected between the cylinder mounting seat and the bracket.

[0010] Further, it further includes a plurality of connection blocks mounted on the cylinder mounting seat. The connection blocks correspond to the weighing sensors one by one. A force-bearing leg is arranged at the bottom of the connection block, and the force-bearing leg is inserted into a through hole on the corresponding weighing sensor.

[0011] Further, there is a gap between the force-bearing leg and the corresponding through hole.

[0012] Further, the cylinder mounting seat includes a bottom plate and a sensor connection plate fixed to the bottom surface of the bottom plate. The number of the sensor connection plates is two and they are respectively arranged on opposite sides of the bottom plate. Both ends of each sensor connection plate are respectively connected to one of the weighing sensors.

[0013] Further, the weighing sensor is a cantilever weighing sensor.

[0014] Further, it further includes mixing blades and a mixing motor, wherein: the mixing blades are arranged inside the mixing cylinder; the mixing motor is arranged at the bottom of the mixing cylinder, and its output shaft is in transmission connection with the mixing blades.

[0015] The second object of the present utility model is to provide a core making device, including the mixing device described in any one of the above.

[0016] Advantages of the present utility model:

[0017] The present utility model provides a mixing device and a core making device. The mixing device includes a mixing cylinder, a bracket, and several weighing sensors. Among them, the mixing cylinder is arranged on the bracket, and the weighing sensors are arranged at the bottom of the mixing cylinder and are connected between the mixing cylinder and the bracket. The mixing device provided in this application can, by arranging weighing sensors at the bottom of the mixing cylinder, obtain the weight of the sand material in the mixing cylinder in real time during the process of the sand material entering the mixing cylinder, eliminating the traditional weighing hopper connected between the sand storage tank and the mixing cylinder, thereby reducing the occupied space and simplifying the overall structure. It is not only applicable to occasions with limited space, but also has advantages such as low cost and convenient operation. Description of the Drawings

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a front structural schematic diagram of the mixing device provided by the embodiment of the present utility model;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the mixing device (removing the sand discharging mechanism) provided by the embodiment of the present utility model;

[0021] Figure 3 It is an assembled structural schematic diagram of the mixing cylinder and the cylinder mounting seat provided by the embodiment of the present utility model;

[0022] Figure 4 Schematic diagram of the assembly structure of the bracket, load cell and connecting block provided by the embodiment of the present utility model;

[0023] Figure 5 Schematic diagram of the connection structure of the load cell and the connecting block provided by an embodiment of the present utility model;

[0024] Figure 6 Schematic diagram of the connection structure of the load cell and the connecting block provided by another embodiment of the present utility model.

[0025] Icon:

[0026] 1 - Sand mixing cylinder;

[0027] 2 - Bracket; 21 - Leg;

[0028] 3 - Load cell; 31 - Through hole;

[0029] 4 - Cylinder mounting seat; 41 - Bottom plate; 42 - Motor mounting table; 43 - Sensor connecting plate;

[0030] 5 - Connecting block; 51 - Force - bearing leg; 511 - Spherical block; 52 - Connecting block body;

[0031] 6 - Sand mixing motor;

[0032] 7 - Sand discharging mechanism;

[0033] 8 - Universal joint; 81 - gland; 82 - fixing pin; 83 - spherical groove. Detailed implementation manners

[0034] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some, rather than all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] It should be noted that in the description of the present utility model, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] Due to the setting of the weighing hopper, the existing sand mixing device has a relatively large overall volume and a complex structure, and cannot be applied to occasions with limited space.

[0038] Based on this, the first aspect embodiment of the present utility model provides a sand mixing device. Referring to Figure 1 , the sand mixing device includes a sand mixing cylinder 1, a bracket 2, and a plurality of weighing sensors 3. Among them, the sand mixing cylinder 1 is arranged on the bracket 2, and the weighing sensors 3 are arranged at the bottom of the sand mixing cylinder 1 and are connected between the sand mixing cylinder 1 and the bracket 2.

[0039] For the sand mixing device provided by the present application, by arranging the weighing sensors 3 at the bottom of the sand mixing cylinder 1, the weight of the material in the sand mixing cylinder 1 can be obtained in real time during the process of the material entering the sand mixing cylinder 1, eliminating the traditional weighing hopper connected between the sand storage tank and the sand mixing cylinder 1, thereby reducing the occupied space and simplifying the overall structure. It is not only applicable to occasions with limited space, but also has advantages such as low cost and convenient operation.

[0040] Continuing to refer to Figure 1 , the sand mixing device further includes sand mixing blades, a sand mixing motor 6, and a sand discharging mechanism 7. Among them: the sand mixing blades are arranged inside the sand mixing cylinder 1; the sand mixing motor 6 is arranged at the bottom of the sand mixing cylinder 1, and its output shaft is in transmission connection with the sand mixing blades; the sand discharging mechanism 7 is arranged at the sand outlet of the sand mixing cylinder 1.

[0041] In this embodiment, two sand outlets are provided on the side wall of the sand mixing cylinder 1. Correspondingly, the number of the sand discharging mechanisms 7 is two and they are respectively arranged on the opposite sides of the sand mixing cylinder 1. The above setting can improve the discharging efficiency.

[0042] The working process of the sand mixing device is as follows:

[0043] In the initial state, the sand discharging mechanism 7 closes the sand outlet of the sand mixing cylinder 1;

[0044] First, the sand material is put into the sand mixing cylinder 1. During this process, the weighing sensors 3 can obtain the weight of the sand material in the sand mixing cylinder 1 in real time until the weighing sensors 3 measure that the weight of the sand material in the sand mixing cylinder 1 reaches the set value, and then stop putting the sand material;

[0045] Next, the auxiliary agent is put into the sand mixing cylinder 1 until the total weight of the materials in the sand mixing cylinder 1 measured by the weighing sensor 3 reaches the set value, and then the input of the auxiliary agent is stopped. And so on until all the materials are fed into the sand mixing cylinder 1;

[0046] Subsequently, the sand mixing motor 6 is started. The sand mixing motor 6 drives the sand mixing blades to rotate, and the sand mixing blades stir the materials in the sand mixing cylinder 1 to mix the materials;

[0047] After the materials are mixed, the sand discharging mechanism 7 opens the sand outlet of the sand mixing cylinder 1, and the mixed materials are discharged from the sand outlet.

[0048] As described above, during the working process of the sand mixing device provided by the present application, the materials are directly put into the sand mixing cylinder 1, omitting the traditional step of weighing with a weighing hopper, and the operation is simple and efficient. Since the weighing hopper is omitted, the overall height of the sand mixing device is relatively low, making the device suitable for occasions with limited installation space, and at the same time reducing the manufacturing cost.

[0049] Refer to Figure 2 , the number of the weighing sensors 3 is one or more; preferably, the number of the weighing sensors 3 is multiple and they are distributed around the axis of the sand mixing cylinder 1.

[0050] In this embodiment, the number of the weighing sensors 3 is four and they are evenly distributed around the axis of the sand mixing cylinder 1. During operation, the signals of the multiple weighing sensors 3 are processed by an adjuster and then transmitted to a measuring instrument, so as to accurately obtain the weight of the materials in the sand mixing cylinder 1.

[0051] Refer to Figure 3 , the sand mixing device further includes a cylinder mounting seat 4. The sand mixing cylinder 1 is mounted on the cylinder mounting seat 4, and the weighing sensor 3 is connected between the cylinder mounting seat 4 and the bracket 2.

[0052] Specifically, the cylinder mounting seat 4 includes a bottom plate 41, a motor mounting table 42 and a sensor connecting plate 43 fixed to the bottom surface of the bottom plate 41. Among them: the sand mixing cylinder 1 is fixed to the upper end surface of the bottom plate 41; the sand mixing motor 6 is fixed to the motor mounting table 42; the number of the sensor connecting plates 43 is two and they are respectively arranged on the opposite sides of the bottom plate 41, and both ends of each sensor connecting plate 43 are respectively connected to a weighing sensor 3.

[0053] Refer to Figure 4 , the bracket 2 includes a plurality of legs 21, and a weighing sensor 3 is arranged between each leg 21 and the sand mixing cylinder 1.

[0054] Specifically, the support 2 includes a plurality of legs 21, and adjacent two legs 21 are fixedly connected by connecting rods; the legs 21 and the weighing sensors 3 are in one-to-one correspondence, and each weighing sensor 3 is fixed to the corresponding leg 21 by screws; the sand mixing cylinder 1 is arranged above each weighing sensor 3. With the above arrangement, the weighing sensors 3 can obtain the weight of the materials in the sand mixing cylinder 1 in real time.

[0055] Referring to Figure 4 and Figure 5 , the sand mixing device further includes a plurality of connecting blocks 5 installed on the cylinder mounting seat 4, the connecting blocks 5 and the weighing sensors 3 are in one-to-one correspondence, a stress leg 51 is arranged at the bottom of the connecting block 5, and the stress leg 51 is inserted into a through hole 31 on the corresponding weighing sensor 3.

[0056] In this embodiment, the weighing sensor 3 is a cantilever weighing sensor. One end of the weighing sensor 3 is fixed to the corresponding leg 21 by screws, the other end thereof is suspended and provided with a through hole 31 thereon; each connecting block 5 is fixed to the cylinder mounting seat 4 by screws, and the stress leg 51 on the connecting block 5 is inserted into the corresponding through hole 31 and locked by screws and other fasteners.

[0057] The cantilever weighing sensor has advantages such as good linearity, high precision, small volume and not being easily damaged, and can perform weighing work reliably for a long time.

[0058] As an optional embodiment, there is a gap between the stress leg 51 and the corresponding through hole 31. With the above arrangement, an amount of movement for position fine-tuning of the corresponding stress leg 51 is reserved in each through hole 31, so as to avoid damaging the weighing sensor 3.

[0059] As another optional embodiment, referring to Figure 6 , the sand mixing device further includes a plurality of universal connectors 8, and the universal connectors 8 and the weighing sensors 3 are in one-to-one correspondence. The universal connector 8 includes a gland 81 and a fixing pin 82 that are detachably connected, wherein the lower end of the fixing pin 82 is inserted into a through hole 31 on the corresponding weighing sensor 3, and a spherical groove 83 is formed by surrounding between the gland 81 and the fixing pin 82; the connecting block 5 includes a connecting block body 52, the upper end of the stress leg 51 is detachably connected to the connecting block body 52, and a spherical block 511 is arranged at the lower end of the stress leg 51, and the spherical block 511 is clamped in the corresponding spherical groove 83.

[0060] Specifically, the lower end of the fixing pin 82 is inserted into the corresponding through hole 31 and locked by a nut; a hemispherical groove is provided on each of the gland 81 and the fixing pin 82. When the gland 81 and the fixing pin 82 are locked by screws, a spherical groove 83 is formed between them; the shape of the spherical groove 83 is adapted to the shape of the spherical block 511, the spherical block 511 is clamped in the spherical groove 83, and there is a movable gap between the spherical block 511 and the spherical groove 83; the upper end of the force-bearing leg 51 penetrates through the gland 81 and is screwed to the connecting block body 52.

[0061] Further, a prism section for a tool such as a wrench to be screwed is provided on the force-bearing leg 51, and this prism section is located between the connecting block body 52 and the spherical block 511.

[0062] The above settings enable all-round fine adjustment of the relative position between the weighing sensor 3 and the force-bearing leg 51, so as to avoid damaging the weighing sensor 3.

[0063] In the second aspect of the embodiments of the present invention, a core-making device is provided, and the core-making device includes the sand mixing device described in any one of the above embodiments. The core-making device at least has all the technical effects of the above sand mixing device, which will not be elaborated here.

[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sand mixing device, characterized in that, It includes a sand mixing drum (1), a bracket (2), and a number of weighing sensors (3). Among them, the sand mixing drum (1) is arranged on the bracket (2), and the weighing sensors (3) are arranged at the bottom of the sand mixing drum (1) and connected between the sand mixing drum (1) and the bracket (2).

2. The sand mixing device according to claim 1, wherein The number of the weighing sensors (3) is multiple and they are distributed around the axis of the sand mixing drum (1).

3. The sand mixing device according to claim 2, wherein, The bracket (2) includes a plurality of legs (21), and one of the weighing sensors (3) is arranged between each leg (21) and the sand mixing drum (1).

4. The sand mixing device according to claim 1, wherein It further includes a cylinder mounting seat (4). The sand mixing drum (1) is mounted on the cylinder mounting seat (4), and the weighing sensors (3) are connected between the cylinder mounting seat (4) and the bracket (2).

5. The sand mixing device according to claim 4, wherein It further includes a number of connecting blocks (5) mounted on the cylinder mounting seat (4). The connecting blocks (5) correspond to the weighing sensors (3) one by one. A force-bearing leg (51) is arranged at the bottom of the connecting block (5), and the force-bearing leg (51) is inserted into a through hole (31) on the corresponding weighing sensor (3).

6. The sand mixing device according to claim 5, characterized in that, There is a gap between the force-bearing leg (51) and the corresponding through hole (31).

7. The sand mixing device according to claim 5, wherein, The cylinder mounting seat (4) includes a bottom plate (41) and a sensor connecting plate (43) fixed to the bottom surface of the bottom plate (41). The number of the sensor connecting plates (43) is two and they are respectively arranged on the opposite sides of the bottom plate (41). Both ends of each sensor connecting plate (43) are respectively connected to one of the weighing sensors (3).

8. The sand mixing device according to claim 1, characterized in that, The weighing sensor (3) is a cantilever weighing sensor.

9. The sand mixing device according to claim 1, wherein It further includes a sand mixing blade and a sand mixing motor (6), where: the sand mixing blade is arranged inside the sand mixing drum (1); the sand mixing motor (6) is arranged at the bottom of the sand mixing drum (1), and its output shaft is in transmission connection with the sand mixing blade.

10. A core-making device, characterized in that, It includes the sand mixing device according to any one of claims 1 to 9.

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