Feeding dust removal mechanism and injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, and discloses a feeding dust removal mechanism and an injection molding machine, the feeding dust removal mechanism comprises a raw material bin, the right side of the raw material bin is provided with a dust removal box, the dust removal box is internally provided with an annular pipe, the annular pipe is of a structure with an upper section, a middle section and a lower section, and the upper section and the lower section of the annular pipe are single-caliber round pipes; the middle section of the annular pipe is divided into an upper layer and a lower layer which are separated through a filter plate, the two ends of the upper layer of the middle section of the annular pipe are communicated with the upper section and the lower section of the annular pipe respectively, the lower layer of the middle section of the annular pipe is connected with a first dust suction pipe, and the end, away from the annular pipe, of the first dust suction pipe extends out of the dust removal box and is connected with the dust collection box. The bottom of the storage bin is connected with a discharging pipe. According to the utility model, raw materials slide down along the annular pipe, impurities mingled in the raw materials are easier to separate, dust is sucked into the lower layer and is absorbed through the first dust suction pipe, the dust removal efficiency is higher, and secondary pollution of the raw materials is prevented.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to a feeding dust removal mechanism and an injection molding machine. Background Art

[0002] Injection molding machines are molding equipment that uses plastic molds to make plastic products of various shapes from thermoplastic or thermosetting plastics. Due to their advantages such as easy operation and the ability to mold complex plastic products in one go, injection molding machines are widely used in many fields.

[0003] The raw materials used in injection molding machines are granular or powdered plastics. The raw materials are mostly transported under negative pressure. Since the raw material granules usually contain other impurities, and dust in the air is also sucked in during the negative pressure suction process, dust removal treatment is required before production.

[0004] The existing application publication number CN215943529U discloses a dust removal device for a hopper of an injection molding machine, including a dust removal pipe and a dust removal bag. The dust removal pipe connects the hopper and a vacuum pump. A fixing ring is fixed to the open end of the dust removal bag, which is fixed to the inlet of the dust removal pipe. A movable ring is fixed to the other end of the dust removal bag and is slidably connected inside the dust removal pipe. A spring connects the fixing ring and the movable ring, with the spring located outside the dust removal bag. A dust scraper ring is provided inside the fixing ring, with its free end abutting against the inner wall of the dust removal bag. This utility model effectively solves the problem of dust easily clogging the inlet of the vacuum pump in existing hopper filtration devices by setting a dust removal bag inside the dust removal pipe to filter dust.

[0005] However, this solution still has shortcomings. In actual use, due to the influence of the diameter of the dust collection pipe, the contact area with the plastic particles inside the hopper is too small, resulting in low dust collection efficiency. At the same time, during the dust collection process, plastic particles are easily sucked into the dust collection bag, causing secondary pollution.

[0006] Therefore, it is necessary to provide a feeding dust removal mechanism and an injection molding machine to solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a feeding and dust removal mechanism and an injection molding machine.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a feeding and dust removal mechanism, including a raw material silo, a dust removal box on the right side of the raw material silo, an annular tube inside the dust removal box, the annular tube having a three-section structure of upper, middle and lower sections, the upper and lower sections of the annular tube being single-diameter circular tubes, the middle section of the annular tube having two layers separated by a filter plate, the two ends of the upper layer of the middle section of the annular tube being connected to the upper and lower sections of the annular tube respectively, and the lower layer of the middle section of the annular tube being connected to a first suction pipe, the end of the first suction pipe away from the annular tube extending out of the dust removal box and connected to the dust collection box.

[0009] Preferably, the raw material silo and the dust removal box are connected by a suction pipe, the suction pipe is equipped with a negative pressure pump, and the right end of the suction pipe extends into the dust removal box and is connected to the upper section of the annular pipe.

[0010] Preferably, a second suction pipe is provided at the end of the dust collection box away from the first suction pipe, and a dust extraction fan is provided on the second suction pipe. A filter screen is provided inside the dust collection box on the side near the second suction pipe, and the dust collection box is fixedly connected to the dust removal box through a support plate.

[0011] Preferably, a storage bin is provided on the right side of the dust collector, and the dust collector and the storage bin are connected by a feeding pipe. The left end of the feeding pipe extends into the dust collector and is connected to the lower section of the annular pipe. A discharge pipe is connected to the bottom of the storage bin, and a control valve is provided on the discharge pipe. A frame is provided below the storage bin.

[0012] Preferably, the filter plate is located in the lower middle position of the middle section of the annular tube, and the filter plate is fixedly connected to the annular tube. Both ends of the lower middle section of the annular tube are sealed.

[0013] Preferably, the connection between the first suction pipe and the middle section of the annular pipe is located at the lowest end of the middle section of the annular pipe.

[0014] An injection molding machine in which the above-mentioned feeding and dust removal mechanism is used.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] In this invention, the upper and lower sections of the annular tube serve as guides, allowing the raw material to slide down quickly. The middle section of the annular tube serves as a dust removal unit, separated by a filter plate sandwiched in the middle. Dust is drawn into the lower layer and carried into the dust collection box for storage through the first suction pipe. The pore size of the filter plate is smaller than the size of the injection molding machine's raw material, preventing the raw material from being sucked into the filter plate. As the raw material slides down the annular tube, impurities mixed inside it are more easily separated and absorbed through the first suction pipe, resulting in higher efficiency. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a diagram showing the internal structure of the dust collector box described in this utility model;

[0019] Figure 3 This is a front sectional view of the middle section of the annular tube described in this utility model;

[0020] Figure 4 for Figure 2 Enlarged view of the structure at point A in the middle.

[0021] In the diagram: 1-Raw material bin; 11-Suction pipe; 12-Negative pressure pump; 2-Dust collection box; 21-Annular pipe; 211-Filter plate; 22-Dust collection box; 23-Support plate; 24-First suction pipe; 25-Dust extraction fan; 26-Second suction pipe; 27-Filter screen; 28-Feeding pipe; 3-Storage bin; 31-Frame; 32-Discharge pipe. DETAILED DESCRIPTION

[0022] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0023] Example 1

[0024] Please see Figures 1-4 This utility model provides a technical solution: a feeding dust removal mechanism, including a raw material silo 1, a dust removal box 2 on the right side of the raw material silo 1, and an annular pipe 21 inside the dust removal box 2. The annular pipe 21 has a three-section structure: upper, middle, and lower. The upper and lower sections of the annular pipe 21 are both single-diameter circular pipes. The middle section of the annular pipe 21 has two layers separated by a filter plate 211. The two ends of the upper layer of the middle section of the annular pipe 21 are respectively connected to the upper and lower sections of the annular pipe 21. The lower middle section of the annular tube 21 is connected to a first suction pipe 24. The end of the first suction pipe 24 away from the annular tube 21 extends out of the dust collection box 2 and is connected to the dust collection box 22. The connection between the first suction pipe 24 and the middle section of the annular tube 21 is located at the lowest end of the middle section of the annular tube 21. The raw material silo 1 and the dust collection box 2 are connected by a suction pipe 11. A negative pressure pump 12 is provided on the suction pipe 11. The right end of the suction pipe 11 extends into the dust collection box 2 and is connected to the upper section of the annular tube 21.

[0025] The upper and lower sections of the annular pipe 21 serve as guides, allowing the raw materials to slide down rapidly. The middle section of the annular pipe 21 serves as a dust removal function. The dust is separated by the filter plate 211 sandwiched in the middle, and is drawn into the lower layer and carried into the dust collection box 22 for storage through the first dust suction pipe 24.

[0026] Furthermore, a storage bin 3 is provided on the right side of the dust collector 2, and the dust collector 2 and the storage bin 3 are connected by a feeding pipe 28. The left end of the feeding pipe 28 extends into the dust collector 2 and is connected to the lower section of the annular pipe 21. A discharge pipe 32 is connected to the bottom of the storage bin 3, and a control valve is provided on the discharge pipe 32. A frame 31 is provided below the storage bin 3.

[0027] After dust removal, the raw materials enter the storage bin 3 through the feeding pipe 28 for unified collection. By controlling the discharge pipe 32, the injection molding machine can be fed.

[0028] Furthermore, the filter plate 211 is located in the lower middle part of the middle section of the annular tube 21, and the filter plate 211 is fixedly connected to the annular tube 21. Both ends of the lower middle section of the annular tube 21 are sealed. The bending structure of the filter plate 211 and the annular tube 21 are the same, which ensures the internal fit.

[0029] The aperture of the filter plate 211 is smaller than that of the injection molding material to prevent the material from being sucked into the filter plate 211; the material slides down the annular tube 21, and the impurities mixed in with it are more easily separated and absorbed through the first dust suction tube 24, which is more efficient.

[0030] Example 2

[0031] Based on Embodiment 1, a second suction pipe 26 is provided at the end of the dust collection box 22 away from the first suction pipe 24. A dust extraction fan 25 is provided on the second suction pipe 26. A filter screen 27 is provided inside the dust collection box 22 on the side near the second suction pipe 26. The dust collection box 22 is fixedly connected to the dust removal box 2 through a support plate 23. A side door (not shown in the figure) is provided on the side of the dust collection box 22. A sealing gasket is provided inside the side door to maintain the sealing effect of the dust collection box 22 when closed.

[0032] By setting up the filter screen 27, dust inside the dust collection box 22 can be prevented from entering the dust extraction fan 25 and affecting the dust extraction effect; the dust is retained in the dust collection box 22 through the first suction pipe 24 and collected uniformly.

[0033] Example 3

[0034] An injection molding machine includes the feeding and dust removal mechanism described in the above embodiments.

[0035] The working principle of this utility model is as follows: When using this utility model, the negative pressure pump 12 is started first to draw the raw material from the raw material silo 1 into the dust removal box 2. The raw material moves downward through the annular pipe 21. The upper and lower sections of the annular pipe 21 serve as guides, allowing the raw material to slide down quickly. The middle section of the annular pipe 21 serves as a dust removal function. The dust is separated by the middle filter plate 211 and drawn into the lower layer by the dust extraction fan 25. It is then carried into the dust collection box 22 for storage through the first dust suction pipe 24. The dust-removed raw material enters the storage bin 3 through the feeding pipe 28 for unified collection. By controlling the feeding pipe 32, the injection molding machine can be fed.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A feeding and dust removal mechanism, characterized in that: The system includes a raw material silo (1), and a dust collection box (2) is provided on the right side of the raw material silo (1). The dust collection box (2) is equipped with an annular pipe (21) inside. The annular pipe (21) has a three-section structure: upper, middle and lower. The upper and lower sections of the annular pipe (21) are both single-diameter circular pipes. The middle section of the annular pipe (21) has two layers that are separated by a filter plate (211). The two ends of the upper layer of the middle section of the annular pipe (21) are connected to the upper and lower sections of the annular pipe (21) respectively. The lower layer of the middle section of the annular pipe (21) is connected to a first suction pipe (24). The end of the first suction pipe (24) away from the annular pipe (21) extends out of the dust collection box (2) and is connected to the dust collection box (22).

2. The feeding and dust removal mechanism according to claim 1, characterized in that: The raw material silo (1) and the dust removal box (2) are connected by a suction pipe (11). The suction pipe (11) is equipped with a negative pressure pump (12). The right end of the suction pipe (11) extends into the dust removal box (2) and is connected to the upper section of the annular pipe (21).

3. The feeding and dust removal mechanism according to claim 1, characterized in that: The dust collection box (22) is provided with a second suction pipe (26) at the end away from the first suction pipe (24). The second suction pipe (26) is provided with a dust extraction fan (25). The dust collection box (22) is provided with a filter screen (27) on the side of the inside of the dust collection box (22) near the second suction pipe (26). The dust collection box (22) is fixedly connected to the dust removal box (2) through a support plate (23).

4. The feeding and dust removal mechanism according to claim 1, characterized in that: The dust collector (2) has a storage bin (3) on its right side and the dust collector (2) and the storage bin (3) are connected by a feeding pipe (28). The left end of the feeding pipe (28) extends into the dust collector (2) and is connected to the lower section of the annular pipe (21). The bottom of the storage bin (3) is connected to a discharge pipe (32). A control valve is provided on the discharge pipe (32). A frame (31) is provided below the storage bin (3).

5. The feeding and dust removal mechanism according to claim 1, characterized in that: The filter plate (211) is located in the middle of the lower part of the annular tube (21), and the filter plate (211) is fixedly connected to the annular tube (21). Both ends of the lower part of the middle section of the annular tube (21) are sealed.

6. The feeding and dust removal mechanism according to claim 1, characterized in that: The connection between the first suction pipe (24) and the middle section of the annular pipe (21) is located at the lowest end of the middle section of the annular pipe (21).

7. An injection molding machine, characterized in that: Includes the feeding and dust removal mechanism as described in any one of claims 1 to 6.

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