Injection molding raw material screening device

Abstract

The utility model relates to the technical field of injection molding raw material screening, in particular to an injection molding raw material screening device which comprises a cleaning box installed on the right side of the top of a screening box. And a cleaning device for cleaning and removing impurities from the injection molding raw material particles is arranged in the cleaning box. Multi-stage screening of injection molding raw material particles is achieved through the screening plate and the material guiding screening plate which are vertically arranged at equal intervals, then a small amount of metal impurities remaining in internal gaps of the injection molding raw material particles are comprehensively screened out, water flow in the cleaning box is disturbed through the rotating cleaning cylinder, and therefore the raw material particles in the cleaning box are cleaned; and in the rotating process, the raw materials are guided into the cleaning cylinder through the feeding port, stirring packing augers on the outer surface of the rotating shaft are matched, raw material particles in the cleaning cylinder are stirred and cleaned, and the cleaning efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding raw material screening, in particular to an injection molding raw material screening device. Background Art

[0002] An injection molding machine is a device used for injection molding. For example, a Chinese patent with the publication number CN220780749U discloses an injection molding raw material screening device. By using a dial plate, the adsorption range of unqualified products containing metal impurities is further increased, and the advancing raw materials are shaken, making it easier for the dial plate to adsorb unqualified products containing metal impurities, further improving the adsorption treatment effect.

[0003] However, for the injection molding raw material screening device in the above application, it only removes metal impurities in the injection molding raw materials. Before removing the metal impurities in the injection molding raw materials, since the particle sizes of the masterbatch after production are often different, the gaps between the masterbatch in the stacked state are either large or small. Therefore, when the dial plate adsorbs metal substances, it cannot completely adsorb the metal substances doped in the masterbatch in small gaps, resulting in a small amount of metal substances remaining. Therefore, if the particle size screening of the masterbatch is not carried out before adsorbing metal substances, there will be a defect that the metal substances cannot be completely adsorbed and removed, seriously affecting the quality of injection molded products. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides an injection molding raw material screening device, which solves the technical problem that the prior art only removes metal impurities in the injection molding raw materials, while the particle sizes of the masterbatch are often different, and there are often a small amount of impurities accumulated in the gaps between the masterbatch in the stacked state, which may lead to defects inside the injection molded products. Therefore, it is necessary to screen the particle size of the masterbatch.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: An injection molding raw material screening device includes a cleaning box installed on the right side of the top of the screening box. Inside the screening box, there is a screening device for grading and screening injection molding raw material particles, and inside the cleaning box, there is a cleaning device for cleaning and removing impurities from the injection molding raw material particles.

[0006] The screening device includes two screening plates vertically and equidistantly arranged in the upper middle part of the screening box. A guiding sieve plate is installed below the inside of the screening box. The screening plates and the guiding sieve plate are both inclined and installed inside the screening box, and evenly penetrated with guiding holes with gradually decreasing inner diameters. One side of the screening box is provided with a discharge pipe corresponding to the lowest inclined ends of the screening plates and the guiding sieve plate. Inside the screening box, there is a vibration assembly that makes the screening plates swing intermittently along the up and down trajectory continuously.

[0007] Preferably, the vibration assembly includes telescopic springs installed at the four corners of the bottom of the screening plate. Support blocks for installing the telescopic springs are provided on the inner wall of the screening box. The rotating shaft is rotatably connected inside the empty slot opened on the back of the screening box, and a convex block for making the lower surface of the screening plate swing up and down is fixedly connected to its front end. A drive motor for driving the rotating shaft to rotate is installed on the screening box.

[0008] Preferably, belt pulleys are installed on both of the two rotating shafts, and the two rotating shafts are connected by a transmission belt.

[0009] Preferably, diversion slopes are respectively arranged on the left and right sides of the bottom of the screening box. A waste discharge pipe corresponding to the lowest end of the diversion slope is installed on one side of the screening box. An observation window is installed on the screening box.

[0010] Preferably, the cleaning device includes a cleaning cylinder arranged inside the cleaning box. A rotating shaft rotatably installed on the inner wall of the cleaning box penetrates along the central axis position of the cleaning cylinder. A stirring auger located inside the cleaning cylinder is installed on the rotating shaft, and the cleaning cylinder and the stirring auger rotate synchronously through the rotating shaft. A plurality of equally spaced feeding ports are arranged around the surface of the cleaning cylinder. The rotating shaft is driven by a belt pulley set and a drive motor.

[0011] Preferably, a discharge port is opened in the middle of the left outer surface of the cleaning box, and a feeding pipe with the discharge end extending into the screening box is installed at the position corresponding to the discharge port.

[0012] By means of the above technical solutions, the present utility model provides an injection molding raw material screening device, which has at least the following beneficial effects:

[0013] 1. The present utility model realizes the multi-stage screening of injection molding raw material particles through the vertically equally spaced screening plates and the guide screening plates, and then comprehensively screens out a small amount of metal impurities remaining in the internal gaps, avoiding the situation that impurities remain inside the raw materials and cause defects inside the injection molding products.

[0014] 2. The present utility model drives the convex block to rotate through the drive motor in the vibration assembly to impact the screening plate, thereby driving the screening plate to vibrate up and down on the telescopic springs, avoiding the accumulation of raw materials on the screening plate and blocking the guide holes, and improving the screening efficiency.

[0015] 3. The present utility model disturbs the water flow in the cleaning box through the rotating cleaning cylinder to clean the raw material particles inside, and guides the raw materials into the inside of the cleaning cylinder through the feeding ports during the rotation process. Cooperating with the stirring auger on the outer surface of the rotating shaft, the raw material particles inside the cleaning cylinder are stirred and cleaned, further improving the cleaning efficiency. Description of the Drawings

[0016] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application.

[0017] In the accompanying drawings:

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the rear view structure of the present utility model;

[0020] Figure 3 is a schematic diagram of the internal sectional structure of the screening box of the present utility model;

[0021] Figure 4 is a schematic diagram of the independent split structure of the cleaning device of the present utility model;

[0022] Figure 5 is a schematic diagram of the partial side view independent structure of the screening device and the cleaning device of the present utility model.

[0023] In the figure: 1. Screening box; 2. Cleaning box; 3. Screening device; 4. Cleaning device; 301. Screening plate; 302. Feeding screening plate; 303. Discharge pipe; 304. Vibration assembly; 3041. Telescopic spring; 3042. Support block; 3043. Rotating shaft; 3044. Protrusion; 3045. Driving motor; 3046. Pulley; 3047. Transmission belt; 305. Diversion landslide; 306. Waste discharge pipe; 307. Observation window; 401. Rotating shaft; 402. Cleaning cylinder; 403. Inlet; 404. Stirring auger; 405. Feeding pipe. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] Based on the problem that in the existing technology, only the metal impurities in the injection molding raw materials are removed, and the particle sizes of the masterbatch are often different, and a small amount of impurities often accumulate inside the gaps between the masterbatch in the stacked state, which may lead to defects inside the injection molding products. Therefore, it is necessary to screen the particle sizes of the masterbatch. This embodiment provides a screening device for injection molding raw materials. Please refer to Figures 1-5, An embodiment provides an injection molding raw material screening device, which can achieve multi-stage screening of injection molding raw material particles, and then comprehensively screen out metal impurities and the like inside the raw materials. The injection molding raw material screening device includes a cleaning box 2 installed on the right side of the top of the screening box 1. A screening device 3 for grading and screening injection molding raw material particles is arranged inside the screening box 1. A cleaning device 4 for cleaning and removing impurities from the injection molding raw material particles is arranged inside the cleaning box 2. The injection molding raw material particles are introduced into the inside of the cleaning box 2 through a feed hopper on the right side of the cleaning box 2. The impurities and dust in the raw material particles are cleaned by the cleaning device 4 to prevent impurities from being mixed in during the melting process and affecting the quality of the finished product. The cleaned raw material particles are discharged into the inside of the screening box 1, and the screening device 3 is used to perform multi-stage screening on the raw material particles to comprehensively screen out a small amount of metal impurities remaining in the internal gaps thereof.

[0027] Since the prior art only sucks out the metal impurities in the injection molding raw materials, and the particle sizes of the masterbatch are often different, there are often a small amount of impurities accumulated in the gaps between the masterbatches in the stacked state, which may lead to defects inside the injection molding finished products. Therefore, a screening device 3 that can perform grading and screening on the diameters of injection molding raw material particles is proposed. The screening device 3 includes two screening plates 301 vertically and equidistantly arranged in the upper middle part of the inside of the screening box 1. A guide screening plate 302 is installed below the inside of the screening box 1. The screening plates 301 and the guide screening plate 302 are both inclined and installed inside the screening box 1, and uniformly penetrating guide holes with gradually decreasing inner diameters are opened thereon. A discharge pipe 303 corresponding to the lowest inclined ends of the 301 and 302 is arranged on one side of the screening box 1. A vibration assembly 304 is arranged inside the screening box 1 to make the screening plate 301 swing intermittently along the up and down trajectory continuously. When the injection molding raw material particles fall onto the screening plate 301, the particles with larger diameters remain on the surface of the top screening plate 301, while the raw material particles with smaller diameters fall onto the middle screening plate 301 through the guide holes with the largest diameters opened on the top screening plate 301, and the raw material particles with even smaller diameters fall onto the guide screening plate 302 through the guide holes on the middle screening plate 301, thus completing the multi-stage screening of the raw material particles. And because the screening plates 301 and the guide screening plate 302 are both inclined and installed inside the screening box 1, under the action of gravity, the raw material particles roll to the left sides of the screening plates 301 and the guide screening plate 302 and are discharged through the discharge pipe 303. The fine impurities mixed in the raw material particles pass through the fine guide holes on the guide screening plate 302 and fall to the bottom of the screening box 1 and are discharged.

[0028] Since relying on gravity to make the raw material particles roll down naturally has low efficiency and there may be problems of raw material accumulation, a vibration assembly 304 for assisting in screening and discharging is also provided at the bottom of the screening plate 301. The vibration assembly 304 includes telescopic springs 3041 installed at the four corners of the bottom of the screening plate 301. Support blocks 3042 for installing the telescopic springs 3041 are provided on the inner wall of the screening box 1. The rotating shaft 3043 is rotatably connected inside the empty slot opened on the back of the screening box 1, and a convex block 3044 acting on the lower surface of the screening plate 301 to swing it up and down is fixedly connected to its front end. A drive motor 3045 for driving the rotating shaft 3043 to rotate is installed on the screening box 1. Starting the drive motor 3045 drives the rotating shaft 3043 to rotate, thereby driving the convex block 3044 at its front end to rotate and hit the screening plate 301, thereby driving the screening plate 301 to vibrate up and down on the telescopic springs 3041, improving the screening efficiency. And because the convex block 3044 is arranged on the right side of the bottom of the screening plate 301, when driving the screening plate 301 to vibrate, it makes the right side high and the left side low, which is more convenient for the discharge of raw material particles.

[0029] Pulley wheels 3046 are installed on both of the two rotating shafts 3043, and the two pulley wheels 3046 are rotationally connected by a transmission belt 3047. By the transmission belt 3047 rotating between the two pulley wheels 3046, the two rotating shafts 3043 are driven to rotate synchronously, so as to vibrate the two screening plates 301 synchronously, improving the screening efficiency.

[0030] Flow guiding slopes 305 are respectively arranged on the left and right sides of the bottom of the screening box 1. A waste discharging pipe 306 corresponding to the lowest end of the flow guiding slope 305 is installed on one side of the screening box 1. An observation window 307 is installed on the screening box 1. The setting of the flow guiding slope 305 facilitates the falling and gathering of impurities, and the impurities can be discharged through the waste discharging pipe 306. Among them, the setting of the observation window 307 facilitates observing the screening situation of the raw material particles inside the screening box 1 in real time.

[0031] Embodiment 2

[0032] On the basis of Embodiment 1, as Figures 1-5As shown, due to the presence of impurities such as dust in the existing injection molding raw material particles, if they are not cleaned, it may affect the subsequent injection molding process. Therefore, the device is also provided with a cleaning device 4. The cleaning device 4 includes a cleaning cylinder 402 disposed inside the cleaning box 2. A rotating shaft 401 rotatably mounted on the inner wall of the cleaning box 2 is disposed through the central axis position of the cleaning cylinder 402. A stirring auger 404 located inside the cleaning cylinder 402 is mounted on the rotating shaft 401, and the cleaning cylinder 402 and the stirring auger 404 rotate synchronously through the rotating shaft 401. A plurality of equally spaced feed ports 403 are disposed around the surface of the cleaning cylinder 402. The rotating shaft 401 is driven by a pulley group and a driving motor 3045. Through a pulley 3046 disposed at the rear end of the rotating shaft 401 and a transmission belt 3047, the rotating shaft 401 is driven to rotate, thereby driving the cleaning cylinder 402 to rotate, driving the water flow inside the cleaning box 2 to flow, cleaning the raw material particles inside it, and during the rotation, the raw material particles inside the cleaning box 2 are introduced into the inside of the cleaning cylinder 402 through the feed ports 403. Moreover, a stirring auger 404 is further disposed on the outer surface of the rotating shaft 401, so that the raw material particles entering the inside of the cleaning cylinder 402 are further cleaned under the agitation of the stirring auger 404, improving the cleaning effect.

[0033] A discharge port is provided in the middle of the left outer surface of the cleaning box 2. A conveying pipe 405 is installed inside the discharge port, and the bottom of the conveying pipe 405 extends into the inside of the screening box 1. During the rotation, the raw material particles inside the cleaning cylinder 402 are thrown out through the feed ports 403 and fall into the inside of the conveying pipe 405 through the discharge port, and finally fall into the inside of the screening box 1 to perform multi-stage screening on the raw material particles.

[0034] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding raw material screening device, comprising a cleaning box (2) installed on the right side of the top of a screening box (1), characterized in that: The screening box (1) is provided with a screening device (3) for classifying and screening the injection molding raw material particles, and the cleaning box (2) is provided with a cleaning device (4) for cleaning and removing impurities from the injection molding raw material particles; The screening device (3) comprises two screening plates (301) vertically and equidistantly arranged in the middle and upper part of the screening box (1); a material guide screening plate (302) is installed at the lower part of the screening box (1); the screening plate (301) and the material guide screening plate (302) are both obliquely installed in the screening box (1), and are evenly penetrated by material guide holes with gradually decreasing inner diameters; a discharge pipe (303) corresponding to the lowest oblique ends of the screening plate (301) and the material guide screening plate (302) is arranged on one side of the screening box (1); and a vibration component (304) is arranged inside the screening box (1) to cause the screening plate (301) to intermittently swing continuously along an up and down trajectory.

2. The injection molding raw material screening device according to claim 1, characterized in that: The vibration assembly (304) comprises telescopic springs (3041) mounted at the four corners of the bottom of the screening plate (301); a support block (3042) for mounting the telescopic spring (3041) is arranged on the inner wall of the screening box (1); a rotating shaft (3043) is rotatably connected inside a hollow groove opened on the back of the screening box (1); a protrusion (3044) is fixedly connected at the front end thereof for acting on the lower surface of the screening plate (301) to make it swing up and down; and a driving motor (3045) for driving the rotating shaft (3043) to rotate is installed on the screening box (1).

3. An injection molding raw material screening device according to claim 2, characterized in that: A pulley (3046) is installed on each of the two rotating shafts (3043), and the two rotating shafts (3043) are connected to each other via a transmission belt (3047).

4. An injection molding raw material screening device according to claim 1, characterized in that: The left and right sides of the bottom of the screening box (1) are respectively provided with diversion slopes (305); one side of the screening box (1) is provided with a debris discharge pipe (306) corresponding to the lowest end of the diversion slope (305); and the screening box (1) is provided with an observation window (307).

5. The injection molding raw material screening device according to claim 2, characterized in that: The cleaning device (4) comprises a cleaning cylinder (402) arranged inside the cleaning box (2), a rotating shaft (401) rotatably mounted on the inner wall of the cleaning box (2) is arranged along the central axis of the cleaning cylinder (402), a stirring auger (404) located inside the cleaning cylinder (402) is mounted on the rotating shaft (401), and the cleaning cylinder (402) and the stirring auger (404) rotate synchronously via the rotating shaft (401), a plurality of equally spaced feed ports (403) are arranged around the surface of the cleaning cylinder (402), and the rotating shaft (401) is driven by a drive motor (3045) via a pulley group.

6. The injection molding raw material screening device according to claim 1, characterized in that: A discharge port is provided in the middle of the left outer surface of the cleaning box (2), and a material conveying pipe (405) is installed at a position corresponding to the discharge port, the discharge end of which extends to the interior of the screening box (1).

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