Mixing device for preparing plastic particles for flame-retardant plastic

Abstract

The utility model relates to the technical field of flame-retardant plastics, and discloses a mixing device for preparing plastic particles for flame-retardant plastics, which comprises a mixing barrel, the top end of the mixing barrel is provided with a driving mechanism, the bottom end of the driving mechanism is fixedly connected with a rotating shaft, and the rotating shaft is fixedly connected with the mixing barrel. The rotating shaft is elastically connected with a sleeve through a reset assembly, the bottom end of the sleeve is fixedly connected with a contact pipe, the outer wall of the sleeve is fixedly connected with stirring blades, the outer wall of the lower end of the sleeve is fixedly connected with crushing blades, the inner wall of the bottom end of the mixing barrel is fixedly connected with a fixing block, and the outer wall of the mixing barrel is hinged to a feeding door. A discharging baffle is detachably mounted at the bottom end of the mixing barrel, and a scraping plate is clamped to the inner wall of each stirring blade through a limiting mechanism. According to the plastic particle mixing device, plastic particles are mixed in an up-and-down stirring mode, so that the plastic particles are mixed more uniformly, and the mixing effect is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of flame retardant plastics, in particular to a mixing device for preparing plastic particles for flame retardant plastics. Background Art

[0002] Flame retardant plastic particles are a type of plastic material with flame retardant properties, usually used to manufacture products that require fire resistance. Flame retardancy refers to the ability of a material to slow down the spread of flames or burn when exposed to a fire source, and to stop burning after the fire source is removed. Flame retardant plastic particles usually add some special flame retardants in their production to improve their flame retardant properties, and in order to significantly improve the flame retardant properties of plastic materials, a mixing device is usually required.

[0003] After searching, the authorization announcement number is CN213227082 U. A raw material mixing, stirring and preparing device for the preparation of silicone rubber plastic is proposed. The staff opens the material discharge door, pours the prepared raw materials into the mixing tank, starts the motor, and the internal stirring blades and stirring pieces begin to rotate. The cooperation of the stirring blades and the stirring pieces allows the raw materials to be mixed better and more evenly. After the stirring is completed, the discharge port door is opened, and the mixed raw materials enter the receiving tray of the receiving trough. This makes the stirring efficiency relatively high, the raw materials are mixed evenly, and manpower is saved.

[0004] The prior art has the following defects: although the existing equipment allows the raw materials to be mixed more evenly by rotating and stirring, the mixing effect cannot be further improved by a single stirring method, which reduces the mixing effect to a certain extent. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a mixing device for preparing plastic particles for flame retardant plastics, which solves the problem in the background art mentioned above that the mixing effect cannot be improved.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a mixing device for preparing plastic particles for flame-retardant plastics, comprising a mixing barrel, a driving mechanism is arranged at the top of the mixing barrel, a rotating shaft is fixedly connected to the bottom end of the driving mechanism, the rotating shaft is elastically connected to a sleeve through a reset assembly, a contact tube is fixedly connected to the bottom end of the sleeve, a stirring blade is fixedly connected to the outer wall of the sleeve, a crushing blade is fixedly connected to the outer wall of the lower end of the sleeve, a fixing block is fixedly connected to the inner wall of the bottom end of the mixing barrel, a feed door is hinged on the outer wall of the mixing barrel, and a discharge baffle is detachably installed at the bottom end of the mixing barrel.

[0007] Preferably, the inner wall of the stirring blade is clamped with a scraper via a limiting mechanism.

[0008] Preferably, the limiting mechanism comprises a limiting block, an inner side wall of the limiting block is fixedly connected to one end of a positioning spring, and the other end of the positioning spring is fixedly connected to the top inner wall of the stirring blade.

[0009] Preferably, the limit block penetrates through and is slidably connected to the inner wall of the stirring blade, the limit block is engaged with the top end of the scraper, and the scraper penetrates through and is slidably connected to the inner wall of the stirring blade.

[0010] Preferably, the scraper is in contact with the inner wall of the mixing barrel.

[0011] Preferably, the driving mechanism comprises a motor, and the motor is fixedly connected to the top of the mixing barrel.

[0012] Preferably, the reset assembly includes a disc, the disc is fixedly connected to the outer wall of the rotating shaft, the bottom end of the disc is fixedly connected to one end of a reset spring, and the other end of the reset spring is fixedly connected to the bottom inner wall of the sleeve.

[0013] Preferably, the sleeve penetrates through and is slidably connected to the outer wall of the rotating shaft, and the contact tube contacts the top end of the fixed block.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, firstly, the contact tube is in continuous contact with the fixed block, so that the sleeve brings the stirring blade and the crushing blade to move vertically and rotate, so that the plastic particles can be fully and evenly mixed, and the mixing effect is improved to a certain extent.

[0016] 2. In the utility model, firstly, the scraper can contact with the inner wall of the mixing barrel, and scrape the residue on the inner wall of the mixing barrel by rotating up and down. When not in use, the scraper can be put away to prevent the scraper from being worn for a long time, thereby improving the cleaning effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the mixing barrel of the utility model;

[0018] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the mixing barrel of the utility model;

[0019] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the casing of the utility model;

[0020] Figure 4 This is a schematic diagram of the overall cross-sectional structure of the stirring blade of the utility model.

[0021] Legend:

[0022] 1. Mixing barrel; 2. Motor; 3. Rotating shaft; 4. Disc; 5. Return spring; 6. Casing; 7. Contact tube; 8. Stirring blade; 9. Crushing blade; 10. Fixed block; 11. Feed door; 12. Discharge baffle; 13. Positioning spring; 14. Limit block; 15. Scraper. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 3 The utility model provides a mixing device for preparing plastic particles for flame-retardant plastics, including a mixing barrel 1, a driving mechanism is arranged at the top of the mixing barrel 1, a rotating shaft 3 is fixedly connected to the bottom end of the driving mechanism, a sleeve 6 is elastically connected to the rotating shaft 3 through a reset assembly, a contact tube 7 is fixedly connected to the bottom end of the sleeve 6, a stirring blade 8 is fixedly connected to the outer wall of the sleeve 6, the plastic particles in the mixing barrel 1 are stirred and mixed by the stirring blade 8, a crushing blade 9 is fixedly connected to the outer wall of the lower end of the sleeve 6, the plastic particles are crushed by the crushing blade 9 to make them better mixed, a fixing block 10 is fixedly connected to the inner wall of the bottom end of the mixing barrel 1, and the fixing block 10 is The inclined surface allows the contact tube 7 to contact with its inclined surface. The outer wall of the mixing barrel 1 is hinged with a feed door 11. The plastic particles are put into the mixing barrel 1 by opening the feed door 11. The bottom end of the mixing barrel 1 is detachably installed with a discharge baffle 12. When discharging is required, the discharge baffle 12 only needs to be moved out by bolts to allow the mixed plastic particles to be discharged from the bottom opening of the mixing barrel 1. The inner wall of the stirring blade 8 is clamped with a scraper 15 through a limiting mechanism. The outer wall of the scraper 15 has a raised portion. When the scraper 15 moves to the left and is retracted, the raised portion will contact the side wall of the stirring blade 8, allowing the top notch of the scraper 15 to overlap and be plugged into the limit block 14.

[0025] See also Figure 4The limiting mechanism includes a limiting block 14, and the inner side wall of the limiting block 14 is fixedly connected to one end of a positioning spring 13. When the limiting block 14 moves upward, the positioning spring 13 is compressed. When resetting, the elastic force of the positioning spring 13 is used to reset the limiting block 14, and the other end of the positioning spring 13 is fixedly connected to the inner wall of the top end of the stirring blade 8. The limiting block 14 penetrates and is slidably connected to the inner wall of the stirring blade 8. The limiting block 14 is engaged with the top end of the scraper 15, and a notch is provided at the top end of the scraper 15, so that the limiting block 14 and the scraper 15 can be engaged to limit the scraper 15. The scraper 15 penetrates and is slidably connected to the inner wall of the stirring blade 8, and the scraper 15 contacts the inner wall of the mixing barrel 1. The driving mechanism includes a motor 2, which is fixedly connected to the top end of the mixing barrel 1, and the output end of the motor 2 drives the rotating shaft 3 to rotate, so that the sleeve 6 drives the stirring blade 8 and the crushing blade 9 to move vertically and rotate.

[0026] See also Figure 3 The reset assembly includes a disc 4, which is fixedly connected to the outer wall of the rotating shaft 3. The bottom end of the disc 4 is fixedly connected to one end of a reset spring 5. At this time, the reset spring 5 is in a compressed state. When resetting, the elastic force of the reset spring 5 is used to reset the sleeve 6. The other end of the reset spring 5 is fixedly connected to the inner wall of the bottom end of the sleeve 6. The sleeve 6 penetrates and is slidably connected to the outer wall of the rotating shaft 3. The outer wall of the rotating shaft 3 has a protrusion, and the inner wall of the sleeve 6 has a notch corresponding to the protrusion. The rotating shaft 3 can rotate with the sleeve 6 and can also allow the sleeve 6 to slide up and down along its outer wall. The contact tube 7 contacts the top of the fixed block 10.

[0027] Working principle: When stirring is required, the scraper 15 is retracted so that it does not contact the inner wall of the mixing barrel 1. The limit block 14 is pulled upward and the positioning spring 13 is compressed to separate the limit block 14 from the notch on the scraper 15. Finally, the scraper 15 is moved to the left so that the scraper 15 does not contact the mixing barrel 1. Finally, the limit block 14 is released and the reverse elastic force of the positioning spring 13 is used to reset the limit block 14, so that the limit block 14 and the top of the scraper 15 are plugged in to limit the entire scraper 15.

[0028] When mixing is required, the feed door 11 is opened to put the plastic particles into the mixing barrel 1, and then the motor 2 is started to rotate the rotating shaft 3, the sleeve 6, the stirring blade 8, the contact tube 7 and the scraper 15, so that the contact tube 7 is constantly in contact with the top of the fixed block 10. When the contact tube 7 is in contact with the lowest point of the fixed block 10, the self-gravity of the entire sleeve 6 and the reverse elastic force of the reset spring 5 are used to allow the sleeve 6 to move downward with the stirring blade 8 and the crushing blade 9. When the contact tube 7 is in contact with the highest point of the fixed block 10, the sleeve 6 will move upward with the stirring blade 8 and the crushing blade 9 and compress the reset spring 5. This step is repeated, so that the sleeve 6 can be continuously rotated and stirred up and down by the stirring blade 8 and the crushing blade 9, so that the plastic particles in the mixing barrel 1 are mixed more evenly.

[0029] When it is necessary to scrape off the residue on the inner wall of the mixing barrel 1, just follow the steps in the first paragraph, move the scraper 15 to the right to make the scraper 15 contact the inner wall of the mixing barrel 1, and use the motor 2 to move the rotating shaft 3, the sleeve 6, the stirring blade 8 and the scraper 15 up and down and rotate, and use the scraper 15 to scrape off the residue on the inner wall of the mixing barrel 1.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mixing device for preparing plastic particles for flame retardant plastics, comprising a mixing barrel (1), characterized in that: The top of the mixing barrel (1) is provided with a driving mechanism, the bottom end of the driving mechanism is fixedly connected to a rotating shaft (3), the rotating shaft (3) is elastically connected to a sleeve (6) through a reset assembly, the bottom end of the sleeve (6) is fixedly connected to a contact tube (7), the outer wall of the sleeve (6) is fixedly connected to a stirring blade (8), the lower end outer wall of the sleeve (6) is fixedly connected to a crushing blade (9), the bottom inner wall of the mixing barrel (1) is fixedly connected to a fixing block (10), the outer wall of the mixing barrel (1) is hinged with a feeding door (11), and the bottom end of the mixing barrel (1) is detachably mounted with a discharging baffle (12).

2. A mixing device for preparing plastic particles for flame retardant plastics according to claim 1, characterized in that: The inner wall of the stirring blade (8) is clamped with a scraper (15) via a limiting mechanism.

3. A mixing device for preparing plastic particles for flame retardant plastics according to claim 2, characterized in that: The limiting mechanism comprises a limiting block (14), the inner side wall of the limiting block (14) is fixedly connected to one end of a positioning spring (13), and the other end of the positioning spring (13) is fixedly connected to the inner wall of the top end of the stirring blade (8).

4. A mixing device for preparing plastic particles for flame retardant plastics according to claim 3, characterized in that: The limit block (14) penetrates through and is slidably connected to the inner wall of the stirring blade (8); the limit block (14) is engaged with the top end of the scraper (15); and the scraper (15) penetrates through and is slidably connected to the inner wall of the stirring blade (8).

5. A mixing device for preparing plastic particles for flame retardant plastics according to claim 4, characterized in that: The scraper (15) is in contact with the inner wall of the mixing barrel (1).

6. A mixing device for preparing plastic particles for flame retardant plastics according to claim 1, characterized in that: The driving mechanism comprises a motor (2), and the motor (2) is fixedly connected to the top of the mixing barrel (1).

7. A mixing device for preparing plastic particles for flame retardant plastics according to claim 1, characterized in that: The reset assembly comprises a disc (4), the disc (4) is fixedly connected to the outer wall of the rotating shaft (3), the bottom end of the disc (4) is fixedly connected to one end of a reset spring (5), and the other end of the reset spring (5) is fixedly connected to the inner wall of the bottom end of the sleeve (6).

8. A mixing device for preparing plastic particles for flame retardant plastics according to claim 1, characterized in that: The sleeve (6) penetrates through and is slidably connected to the outer wall of the rotating shaft (3), and the contact tube (7) is in contact with the top end of the fixed block (10).

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