Raw material screening device for molding sand additive production
By introducing a spreading device into the screening equipment for molding sand additive production, the problem of slow screening caused by raw material accumulation was solved, and uniform contact between the raw material and the screen was achieved, thus improving screening efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG JIAHAO FOUNDRY MATERIALS CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-24
AI Technical Summary
In existing raw material screening machines for molding sand additive production, raw materials may accumulate in the center of the screen after being fed through the feed pipe. This causes the top or middle layer of raw materials to wait until the bottom material is screened before they can come into contact with the screen, resulting in a slow screening process and reduced efficiency.
A spreading device was designed, including components such as slide rails, gears, rings, and scrapers. The gears are driven to rotate by a motor, which in turn drives the scrapers to rotate in the screening chamber, breaking up and spreading the accumulated raw materials so that they are in uniform contact with the screen. Combined with a conical cover and a ring frame, the raw materials are dispersed and piled up.
It improves the screening efficiency of raw materials, reduces uneven screening caused by accumulation, ensures that raw materials are in uniform contact with the screen, and improves the speed and efficiency of the screening process.
Smart Images
Figure CN224542294U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of screening equipment technology, and in particular to a screening device for raw materials used in the production of molding sand additives. Background Technology
[0002] In the production of molding sand additives, the screening of raw materials is a key step. The purpose is to remove impurities, classify particle size, and ensure the purity and uniformity of the additives. Therefore, screening machines are needed to screen the raw materials of molding sand additives during the production process.
[0003] The existing raw material screening machine for molding sand additive production works by feeding the raw materials into the uppermost screening chamber through the feed pipe, then starting the vibrator, which, together with the spring, drives multiple screening chambers and their internal screens to vibrate at a high frequency. This causes raw material particles of different sizes to fall into the screening chambers under the action of vibration, and then be discharged through the discharge pipe corresponding to the screening chamber, thus achieving the screening of the raw materials.
[0004] However, after the raw materials are fed into the screening chamber through the feed pipe, they may accumulate in the center of the screen. This means that the raw materials in the top or middle layers can only come into contact with the screen after the raw materials at the bottom have been screened, which makes the screening process relatively slow and affects the screening efficiency of the raw materials. Utility Model Content
[0005] The technical problem this invention aims to solve is that raw materials may accumulate in the center of the screen after being fed into the screening chamber through the feed pipe. This results in the top or middle layers of raw materials needing to wait for the bottom materials to be screened before they can come into contact with the screen, causing the screening process to be slow and affecting the screening efficiency of raw materials.
[0006] The technical solution adopted by this utility model to solve its technical problem is: a raw material screening device for molding sand additive production, comprising: a machine body, which is placed on the ground to provide support for the overall components, wherein a vibrator is provided at the bottom of the machine body; a screening chamber, which is set on the machine body, wherein a return spring is provided between the bottom screening chamber and the machine body, wherein a feed pipe is provided on the top screening chamber, wherein a discharge pipe is provided on one side of each screening chamber, and wherein a screen is provided inside each screening chamber; and a spreading device, which is set inside the top screening chamber, wherein the spreading device is used to push and disperse the raw materials piled inside the screening chamber, so that the raw materials are evenly in contact with the screen.
[0007] Preferably, the spreading device includes: a slide rail, which is fixedly connected to the inner wall of the top screening chamber, wherein the inner wall of the slide rail has a U-shaped cross-section; a gear, which is fixedly installed inside the top screening chamber by a motor, wherein the motor drives the gear to rotate; a ring, which is placed inside the slide rail and rotates, wherein a toothed ring is fixedly connected to one side of the ring, wherein the toothed ring meshes with the gear, and a perforated rod is fixedly connected to the inner side of the ring; and a scraper, which is slidably installed on the perforated rod by a spring rod, wherein the other end of the spring rod is fixedly connected to the perforated rod, and wherein the scraper is close to the screen surface inside the screening chamber.
[0008] The effect achieved by the above-mentioned components is as follows: By setting up a spreading device, the motor is first started to drive the gear to rotate, which in turn drives the gear ring to rotate. The gear ring then drives the circular ring to rotate inside the slide rail, which in turn drives the perforated rod to rotate. The perforated rod drives the scraper to rotate through the spring rod. During the rotation, the scraper disperses and flattens the raw materials piled on the screen. At the same time, under the reaction force of the spring in the spring rod, the scraper can extend and retract, so that the screen does not collide hard with the scraper when vibrating. This completes the spreading process of the piled raw materials, reducing the excessive accumulation of raw materials in the screening chamber. This prevents the raw materials in the top or middle layers from contacting the screen only after the bottom materials have been screened, resulting in uneven contact between the raw materials and the screen and a relatively slow screening process. This improves the screening efficiency of the raw materials.
[0009] Preferably, the scraper has multiple through holes arranged at equal intervals.
[0010] The effect achieved by the above components is as follows: by setting through holes, raw materials can be discharged through multiple through holes, and the scraper can use multiple through holes to break up agglomerated and tightly packed raw materials, making them more loosely contact the screen and improving screening efficiency.
[0011] Preferably, a positioning rod is fixed to the side of the scraper away from the screen, wherein the positioning rod is placed inside the perforated rod to limit the position of the scraper.
[0012] The effect achieved by the above components is as follows: by setting the positioning rod, the positioning rod can be placed inside the hole rod to assist in limiting the scraper, reducing the scraper from swinging left and right during use, which affects the stability and effect of the scraper spreading material.
[0013] Preferably, a guide rod is fixed to the side of the scraper near the spring rod, wherein the cross-section of the guide rod is conical.
[0014] The effect achieved by the above components is that by setting the guide rod, the raw materials falling onto the scraper can naturally slide onto the screen under the action of the slope of the guide rod surface, reducing the accumulation of raw materials on the scraper.
[0015] Preferably, the ring is rotatably mounted on a plurality of needle rollers on the side near the toothed ring via a shaft, wherein the surface of the needle rollers is in contact with the inner wall of the slide rail.
[0016] The effect achieved by the above components is as follows: by setting the needle roller, the needle roller can replace the ring in contact with the inner wall of the slide rail. At the same time, by utilizing the rotational performance of the needle roller, the friction and wear between the ring and the slide rail are reduced, thereby increasing the life of the ring.
[0017] Preferably, a ring frame is fixed to one side of the ring, wherein a plurality of circular rods arranged in a circular pattern are fixed to the inner side of the ring frame.
[0018] The effect achieved by the above components is as follows: by setting up a ring frame, the ring frame can rotate synchronously with the ring, and during the rotation of the ring frame, multiple round rods are used to scrape off the raw materials piled on the top layer, so that the top layer of raw materials is kept flat, reducing the situation where the pile height is too high and affects the normal input of subsequent raw materials.
[0019] Preferably, a conical cover is fixedly connected to the middle position of the annular frame, wherein the conical cover corresponds to the position of the feed pipe.
[0020] The effect achieved by the above components is that by setting up a conical cover, the input material can fall onto the conical cover, and under the action of the slope of the conical cover surface, the raw material is dispersed to the surrounding area, reducing the situation where the raw material accumulates in the same position on the screen.
[0021] The beneficial effects of this utility model are:
[0022] By setting up a spreading device, the raw materials piled up inside the screening chamber can be dispersed and spread out, so that the raw materials can come into uniform contact with the internal screen. This reduces the excessive accumulation of raw materials inside the screening chamber, which would otherwise cause the raw materials in the top or middle layers to wait until the bottom materials are screened before they can come into contact with the screen, resulting in uneven contact between the raw materials and the screen and a relatively slow screening process. This improves the screening efficiency of the raw materials. Attached Figure Description
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0025] Figure 2 This utility model Figure 1 The unfolded diagram;
[0026] Figure 3 This is a three-dimensional structural diagram of the slide rail of this utility model;
[0027] Figure 4 This is a three-dimensional structural diagram of the conical cover of this utility model;
[0028] Figure 5 This is a three-dimensional structural diagram of the scraper of this utility model;
[0029] Figure 6 This is a three-dimensional structural diagram of the guide rod of this utility model.
[0030] Legend: 1. Machine body; 2. Vibrator; 3. Screening chamber; 4. Feed pipe; 5. Discharge pipe; 6. Spreading device; 61. Slide rail; 62. Gear; 63. Ring; 64. Gear ring; 65. Hole rod; 66. Spring rod; 67. Scraper; 68. Through hole; 69. Positioning rod; 610. Needle roller; 611. Ring frame; 612. Conical cover; 613. Guide rod. Detailed Implementation
[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0033] The raw material screening device for molding sand additive production shown in Figure 1 includes: a machine body, which is placed on the ground to provide support for the overall components, wherein a vibrator is installed at the bottom of the machine body; screening chambers, which are set on the machine body, wherein a return spring is provided between the bottom screening chamber and the machine body, wherein a feed pipe is provided on the top screening chamber, wherein a discharge pipe is provided on one side of each screening chamber, and a screen is provided inside each screening chamber; and a spreading device, which is set inside the top screening chamber, wherein the spreading device is used to push and disperse the raw materials piled inside the screening chamber, so that the raw materials are in uniform contact with the screen.
[0034] The spreading device shown in the figure includes: a slide rail, which is fixedly connected to the inner wall of the top screening chamber, wherein the inner wall of the slide rail has a U-shaped cross-section; a gear, which is fixedly installed inside the top screening chamber by a motor, wherein the motor drives the gear to rotate; a ring, which is placed inside the slide rail and rotates, wherein a toothed ring is fixedly connected to one side of the ring, wherein the toothed ring meshes with the gear, and a perforated rod is fixedly connected to the inner side of the ring; and a scraper, which is slidably mounted on the perforated rod by a spring rod, wherein the other end of the spring rod is fixedly connected to the perforated rod, and the scraper is close to the screen surface inside the screening chamber. By setting up the spreading device, the motor is first started to drive the gear to rotate, which causes the gear to drive the toothed ring to rotate, thus... The toothed ring drives the circular ring inside the slide rail to rotate, which in turn drives the perforated rod to rotate. This perforated rod, through a spring rod, drives the scraper to rotate. During rotation, the scraper disperses and flattens the raw materials accumulated on the screen. Simultaneously, the spring in the spring rod allows the scraper to extend and retract, preventing the screen from colliding hard with the scraper during vibration. This disperses the accumulated raw materials, reducing excessive accumulation inside the screening chamber. This prevents the top or middle layers of raw materials from contacting the screen only after the bottom layers have been screened, resulting in uneven contact between the raw materials and the screen and a slow screening process. This improves the screening efficiency of the raw materials.
[0035] The scraper shown in the figure has multiple through holes arranged at equal intervals. These through holes allow raw materials to be discharged through them, enabling the scraper to break up clumps and tightly packed raw materials, making them more loosely contact the screen and improving screening efficiency. A positioning rod is fixed to the side of the scraper away from the screen. The positioning rod is placed inside the perforated rod to limit the scraper's position. By setting the positioning rod, the scraper can be further limited by placing it inside the perforated rod, reducing the scraper's left and right swinging during use, which would affect the stability and effectiveness of the scraper's material spreading.
[0036] As shown in the figure, a guide rod is fixed to the side of the scraper near the spring rod. The cross-section of the guide rod is conical. By setting the guide rod, the raw material falling onto the scraper can naturally slide onto the screen under the action of the slope of the guide rod surface, reducing the accumulation of raw material on the scraper. The side of the ring near the toothed ring is rotatably mounted with multiple needle rollers via a shaft. The surface of the needle rollers is in contact with the inner wall of the slide rail. By setting the needle rollers, the needle rollers can replace the ring in contacting the inner wall of the slide rail. At the same time, the rotational performance of the needle rollers reduces the friction and wear between the ring and the slide rail, and improves the life of the ring.
[0037] The circular frame shown in the figure is fixed to one side of the ring. Multiple circular rods arranged in a circular pattern are fixed to the inner side of the ring frame. By setting up the ring frame, it can rotate synchronously with the ring. During rotation, the ring frame uses the multiple rods to scrape off the raw materials accumulated on the top layer, keeping the top layer of raw materials flat and reducing the possibility of excessive accumulation affecting the normal input of subsequent raw materials. A conical hood is fixed to the middle of the ring frame, corresponding to the position of the feed pipe. By setting up the conical hood, the input material falls onto the conical hood, and the slope of the conical hood surface disperses the raw materials to the surrounding area, reducing the accumulation of raw materials in the same position on the screen.
[0038] Working principle: During screening, the raw materials are first fed into the uppermost screening chamber through the feed pipe. Then, the vibrator is started, which, together with the spring, drives multiple screening chambers and their internal screens to vibrate at a high frequency. Under the action of vibration, raw material particles of different specifications fall into the multiple screening chambers respectively, and are then discharged through the discharge pipe corresponding to the screening chamber, thus achieving the screening of raw materials.
[0039] First, the motor drives the gear to rotate, which in turn drives the gear ring to rotate. The gear ring then drives the circular ring inside the slide rail to rotate, which in turn drives the perforated rod to rotate. The perforated rod, through a spring rod, drives the scraper to rotate. As the scraper rotates, it breaks up and flattens the raw materials piled on the screen. At the same time, the spring in the spring rod allows the scraper to extend and retract, preventing the screen from colliding hard with the scraper during vibration. Simultaneously, the ring frame rotates synchronously with the circular ring. During rotation, the ring frame uses multiple circular rods to scrape off the top layer of raw materials, keeping the top layer of raw materials flat and preventing them from piling up too high. This completes the process of spreading out the piled raw materials.
[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A raw material screening device for molding sand additive production, characterized in that it includes: The body (1) is placed on the ground to provide support for the whole component, wherein a vibrator (2) is provided at the bottom of the body (1). Screening chamber (3), the screening chamber (3) is set on the machine body (1), wherein a reset spring is provided between the bottom screening chamber (3) and the machine body (1), wherein a feed pipe (4) is provided on the top screening chamber (3), wherein a discharge pipe (5) is provided on one side of the screening chamber (3), wherein a screen is provided inside the screening chamber (3); Spreading device (6) is set inside the top screening chamber (3). The spreading device (6) is used to push and disperse the raw materials piled inside the screening chamber (3) so that the raw materials are in uniform contact with the screen.
2. The raw material screening device for molding sand additive production according to claim 1, characterized in that: The spreading device (6) includes: a slide rail (61), which is fixedly connected to the inner wall of the top screening chamber (3), wherein the inner wall of the slide rail (61) has a U-shaped cross-section; Gear (62), the gear (62) is fixedly installed inside the top screening chamber (3) by a motor, wherein the motor drives the gear (62) to rotate; A circular ring (63) is placed inside the slide rail (61) and rotates. A toothed ring (64) is fixedly connected to one side of the circular ring (63), wherein the toothed ring (64) meshes with a gear (62), and a perforated rod (65) is fixedly connected to the inner side of the circular ring (63). The scraper (67) is slidably mounted on the perforated rod (65) by a spring rod (66), wherein the other end of the spring in the spring rod (66) is fixedly connected to the perforated rod (65), and the scraper (67) is close to the screen surface inside the screening chamber (3).
3. The raw material screening device for molding sand additive production according to claim 2, characterized in that: The scraper (67) has multiple through holes (68) arranged at equal intervals.
4. The raw material screening device for molding sand additive production according to claim 2, characterized in that: A positioning rod (69) is fixed to the side of the scraper (67) away from the screen, wherein the positioning rod (69) is placed inside the perforated rod (65) to limit the scraper (67).
5. The raw material screening device for molding sand additive production according to claim 2, characterized in that: The scraper (67) is fixed to a guide rod (613) on the side near the spring rod (66), wherein the cross-section of the guide rod (613) is conical.
6. The raw material screening device for molding sand additive production according to claim 2, characterized in that: The ring (63) is rotatably mounted on a plurality of needle rollers (610) on the side near the toothed ring (64) via a shaft, wherein the surface of the needle rollers (610) is in contact with the inner wall of the slide rail (61).
7. The raw material screening device for molding sand additive production according to claim 2, characterized in that: A ring frame (611) is fixed to one side of the ring (63), wherein a plurality of circular rods arranged in a circle are fixed to the inner side of the ring frame (611).
8. The raw material screening device for molding sand additive production according to claim 7, characterized in that: A conical cover (612) is fixedly connected to the middle position of the ring frame (611), wherein the conical cover (612) corresponds to the position of the feed pipe (4).