Extrusion die orifice structure of flame-retardant master batch granulator

Abstract

The utility model discloses an extrusion die orifice structure of a flame-retardant master batch granulator. The extrusion die orifice structure comprises an extrusion die holder, a diversion cone, a push-pull net changing mechanism, a protective cover and a pelletizing mechanism, a runner cavity is formed in the extrusion die base, a plurality of extrusion holes communicated with the runner cavity are formed in the side wall of the extrusion die base in the circumferential direction, the flow dividing cone is arranged in the runner cavity, the pelletizing mechanism is used for pelletizing and forming strip-shaped molten materials flowing out of the extrusion holes, and the push-pull net changing mechanism is arranged at the end, away from the extrusion holes, of the extrusion die base. According to the utility model, the sprue spreader is arranged in the extrusion die holder and can guide molten materials to uniformly and quickly flow to the extrusion hole, so that the extrusion efficiency of the molten materials is effectively improved; according to the push-pull screen changing mechanism, automatic switching of the filter screen plates can be achieved through cooperation of the movable sliding plate and the push-pull air cylinder, the filtering continuity of molten materials is guaranteed, switching of the filter screen plates can be completed without shutdown, and the production efficiency of flame-retardant master batches is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of granulator extrusion dies, in particular to an extrusion die structure of a flame retardant masterbatch granulator. Background Art

[0002] Flame retardant masterbatch is a concentrated material formed by processing flame retardants and carrier resins through a special process to improve the flame retardant properties of polymer materials such as plastics or rubber;

[0003] In the prior art, during the processing of flame retardant masterbatch, it is generally extruded and pelletized through a pelletizer. However, since a variety of high-viscosity additives are added to the raw materials of the flame retardant masterbatch, the molten material is prone to uneven diversion and local solidification during transportation and extrusion, which not only affects the extrusion efficiency of the molten material, but also affects the product quality of the flame retardant masterbatch. In addition, since impurities are inevitably mixed into the flame retardant raw materials during the production process, in order to improve the purity of the flame retardant masterbatch product, it is generally necessary to regularly replace the filter screen. However, the existing pelletizer extrusion die usually needs to be shut down for processing when changing the screen, causing production interruption, thereby affecting the production efficiency of the flame retardant masterbatch.

[0004] Therefore, the existing technology has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an extrusion die structure of a flame retardant masterbatch granulator which can evenly split the flow, improve product production quality and increase production efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: an extrusion die structure of a flame retardant masterbatch granulator, comprising an extrusion die base, a diverter cone, a push-pull screen changing mechanism, a protective cover and a pelletizing mechanism;

[0007] The extrusion die base has a flow channel cavity inside, and the flow channel cavity is used to pass the molten material. The side wall of the extrusion die base is provided with a plurality of extrusion holes connected to the flow channel cavity along the circumferential direction. The diverter cone is provided in the flow channel cavity, and the cross-sectional area of ​​the diverter cone gradually increases along the conveying direction of the molten material. The diverter cone is used to guide the molten material to flow to the extrusion holes;

[0008] The pelletizing mechanism is provided on the outlet side wall of the extrusion die base, and is used to pelletize the strip-shaped molten material flowing out of the extrusion hole. The protective cover has a receiving chamber inside, and the extrusion die base and the pelletizing mechanism are partially located in the receiving chamber. The bottom of the protective cover is provided with a blanking channel, and the blanking channel is used to transport the flame retardant masterbatch to be pelletized;

[0009] The push-pull screen changing mechanism is arranged at one end of the extrusion die base away from the extrusion hole, and the push-pull screen changing mechanism includes a mounting base, a movable slide, a push-pull cylinder and a filter plate. The mounting base is connected to the extrusion die base, and a filter chamber connected to the flow channel chamber is provided in the mounting base, and a push-pull chute is provided in the mounting base, and the push-pull chute is vertically connected to the filter chamber.

[0010] The movable slide is located in the push-pull chute and can move relative to the push-pull chute. The movable slide is provided with at least two filter plates along its length. The movable end of the push-pull cylinder is connected to the movable slide. The push-pull cylinder is used to adjust the position of the filter plate. The filter plate is used to filter the molten material entering the flow channel chamber.

[0011] Using the above technical solution, in the extrusion die structure of the flame retardant masterbatch granulator, the push-pull screen changing mechanism also includes a plurality of heating tubes, a plurality of accommodating holes are provided in the mounting seat, the heating tubes are located in the accommodating holes, and the heating tubes are used to heat the mounting seat.

[0012] According to the above technical solution, in the extrusion die structure of the flame retardant masterbatch pelletizing machine, the pelletizing mechanism includes a driving motor, a rotating spindle, a knife holder and a scraper;

[0013] The output shaft of the driving motor is connected to the rotating main shaft, and the driving motor is used to drive the rotating main shaft to rotate. A plurality of the clamping tool seats are arranged along the circumferential direction of the rotating main shaft. The scraper is fastened to the clamping tool seat by bolts. The edge of the scraper is provided with a cutting edge, and the cutting edge abuts against the side wall of the extrusion die seat.

[0014] According to the above technical solution, in the extrusion die structure of the flame retardant masterbatch granulator, the number of the scrapers is three.

[0015] By adopting the above technical solution, in the extrusion die structure of the flame retardant masterbatch granulator, the upper and lower ends of the push-pull chute are respectively provided with limiting slides, and the movable slide is located in the limiting slides.

[0016] According to the above technical solution, in the extrusion die structure of the flame retardant masterbatch granulator, the movable slide plate is provided with a positioning slot hole, and the filter plate is embedded in the positioning slot hole.

[0017] By adopting the above technical solution, in the extrusion die structure of the flame retardant masterbatch granulator, both ends of the movable slide are provided with anti-slip limit seats, and the anti-slip limit seats are used to limit the movable slide from slipping out of the push-pull slide groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The utility model arranges a diverter cone in the extrusion die base, and the cross-sectional area of ​​the diverter cone gradually increases along the conveying direction of the molten material, so that the molten material can flow to the extrusion hole evenly and quickly, avoiding local accumulation and blockage caused by path changes, and effectively improving the extrusion efficiency of the molten material; the push-pull screen changing mechanism can realize automatic switching of the filter plate through the cooperation of the moving slide and the push-pull cylinder, thereby ensuring the filtration continuity of the molten material, and the filter plate switching can be completed without stopping the machine, which greatly improves the production efficiency of the flame retardant masterbatch; at the same time, the heating tube arranged in the mounting seat can keep the molten material in the filter chamber in a high temperature state, avoiding the molten material from solidifying and causing blockage due to temperature reduction, and effectively enhancing the fluidity and filtration efficiency of the molten material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size, without affecting the efficacy and objectives that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed in the present invention.

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the utility model from another perspective;

[0024] Figure 3 This is a schematic diagram of the exploded structure of the push-pull screen changing mechanism of the utility model;

[0025] Figure 4 This is a schematic diagram of the installation structure of the diverter cone of the utility model;

[0026] Figure 5 This is a schematic diagram of the explosion structure of the pelletizing mechanism of the utility model;

[0027] Figure 6 This is a schematic diagram of the internal structure of the protective cover of the present utility model;

[0028] Figure 7This is a schematic diagram of the pelletizing mechanism structure of the present utility model;

[0029] Figure 8 This is a schematic diagram of the installation structure of the pelletizing mechanism of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally located component.

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0033] like Figures 1 to 8 As shown, the embodiment of the present invention provides an extrusion die structure of a flame retardant masterbatch granulator, including an extrusion die base 1, a diverter cone 2, a push-pull screen changing mechanism 3, a protective cover 4 and a pelletizing mechanism 5;

[0034] The extrusion die base 1 has a flow channel chamber 10 inside, and the flow channel chamber 10 is used to pass the molten material. The side wall of the extrusion die base 1 is provided with a plurality of extrusion holes 100 connected to the flow channel chamber 10 along the circumferential direction. The diverter cone 2 is provided in the flow channel chamber 10, and the cross-sectional area of ​​the diverter cone 2 gradually increases along the conveying direction of the molten material. The diverter cone 2 is used to guide the molten material to flow to the extrusion hole 100, so that the molten material flows evenly and quickly into the extrusion hole 100, avoiding the formation of local accumulation or deviation of the molten material due to changes in the path during the flow process, thereby reducing the risk of blockage of the molten material.

[0035] The pelletizing mechanism 5 is arranged on the outlet side wall of the extrusion die base 1. The pelletizing mechanism 5 is used to pelletize the strip-shaped molten material flowing out of the extrusion hole 100. The protective cover 4 has a receiving chamber 40 inside. The extrusion die base 1 and the pelletizing mechanism 5 are partially located in the receiving chamber 40. The bottom of the protective cover 4 is provided with a blanking channel 41. The blanking channel 41 is used to transport the flame retardant masterbatch to be pelletized. The setting of the pelletizing mechanism 5 enables the molten material to be evenly cut into granules immediately after being extruded, thereby improving the particle uniformity and quality of the flame retardant masterbatch. The protective cover 4 isolates the pelletizing area from the external environment, which can effectively prevent the debris of the molten material from splashing, avoids the operator from contacting the high-temperature material, and improves the operation safety.

[0036] The push-pull screen-changing mechanism 3 is arranged at one end of the extrusion die base 1 away from the extrusion hole 100. The push-pull screen-changing mechanism 3 includes a mounting seat 31, a movable slide 32, a push-pull cylinder 33 and a filter plate 34. The mounting seat 31 is connected to the extrusion die base 1. A filter chamber 310 communicating with the flow channel chamber 10 is provided in the mounting seat 31, and a push-pull chute 311 is provided in the mounting seat 31. The push-pull chute 311 is vertically connected to the filter chamber 310. The movable slide 32 is located in the push-pull chute 311 and can be moved relative to the push-pull chute 311. The movable slide 32 is provided with at least two filter plates 34 along its length direction. The movable end of the push-pull cylinder 33 is connected to the movable slide 32. The push-pull cylinder 33 is used to adjust the position of the filter plate 34, and the filter plate 34 is used to filter the molten material entering the flow channel chamber 10. When the pelletizer is in the extrusion process, the molten material enters the flow channel chamber 10 through the filter plate 34. The filter plate 34 can filter impurities in the molten material to prevent impurities or solidified materials from entering the flow channel chamber 10. At this time, the movable slide 32 is in a stable position, and one filter plate 34 is in the filter chamber 310. As the production progresses, the filter plate 34 will gradually accumulate impurities. When the filter plate 34 is blocked to a certain extent, it will affect the flow performance of the molten material. At this time, the push-pull cylinder 33 is started to push the movable slide 32 connected to its movable end to move in the push-pull chute 311. Since the two filter plates 34 on the movable slide 32 are arranged alternately, when one filter plate 34 fails, the movable slide 32 pushes the new filter plate 34 into the filter chamber 310 for replacement, ensuring the continuity of the molten material filtration process. The filter plate 34 can be replaced without stopping the machine, which greatly improves the production efficiency of flame retardant masterbatch.

[0037] like Figure 3As shown, the push-pull screen changing mechanism 3 further includes a plurality of heating tubes 35. The mounting base 31 is provided with a plurality of accommodating holes 312. The heating tubes 35 are located in the accommodating holes 312 and are used to heat the mounting base 31. By providing the heating tubes 35 in the mounting base 31, the molten material can be kept at a high temperature, thereby improving the flowability of the molten material and reducing the risk of clogging.

[0038] like Figure 7 and Figure 8 As shown, the pelletizing mechanism 5 further comprises a drive motor 51, a rotating spindle 52, a blade holder 53, and a scraper 54. The output shaft of the drive motor 51 is connected to the rotating spindle 52, driving the rotating spindle 52 to rotate. Several blade holders 53 are arranged along the circumference of the rotating spindle 52. The scraper 54 is fastened to the blade holders 53 via bolts. The edge of the scraper 54 is provided with a cutting edge 540, which abuts against the sidewall of the extrusion die 1. When the drive motor 51 is activated, it rotates the rotating spindle 52, which in turn drives the blade 540 of the scraper 54 to act on the extrusion hole 100, thereby pelletizing the strip material emerging from the extrusion hole 100. The bolted connection between the scraper 54 and the blade holder 53 facilitates quick replacement of the scraper 54, making it practical and convenient. In this embodiment, there are three scrapers 54.

[0039] like Figure 3 As shown, further, the upper and lower ends of the push-pull slide 311 are respectively provided with limit slides 36, and the movable slide 32 is located in the limit slide 36. The setting of the limit slide 36 can prevent the movable slide 32 from tilting, shaking or offsetting during the pushing and pulling process.

[0040] like Figure 3 As shown, further, a positioning slot 320 is provided on the movable slide plate 32, and the filter plate 34 is embedded in the positioning slot 320. Such a setting can improve the disassembly and assembly efficiency of the filter plate 34, so that the filter plate 34 can be easily taken out for maintenance when it is damaged or worn.

[0041] like Figure 3 As shown, further, anti-slip limit seats 321 are provided at both ends of the movable slide 32, and the anti-slip limit seats 321 are used to limit the movable slide 32 from slipping out of the push-pull slide 311, thereby preventing the movable slide 32 from slipping out of the push-pull slide 311 and affecting the filtering effect of the filter plate 34.

[0042] As described above, 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An extrusion die structure of a flame retardant masterbatch granulator, characterized in that: Including extrusion die base, diverter cone, push-pull screen changing mechanism, protective cover and pelletizing mechanism; The extrusion die base has a flow channel cavity inside, and the flow channel cavity is used to pass the molten material. The side wall of the extrusion die base is provided with a plurality of extrusion holes connected to the flow channel cavity along the circumferential direction. The diverter cone is provided in the flow channel cavity, and the cross-sectional area of ​​the diverter cone gradually increases along the conveying direction of the molten material. The diverter cone is used to guide the molten material to flow to the extrusion holes; The pelletizing mechanism is provided on the outlet side wall of the extrusion die base, and is used to pelletize the strip-shaped molten material flowing out of the extrusion hole. The protective cover has a receiving chamber inside, and the extrusion die base and the pelletizing mechanism are partially located in the receiving chamber. The bottom of the protective cover is provided with a blanking channel, and the blanking channel is used to transport the flame retardant masterbatch to be pelletized; The push-pull screen changing mechanism is arranged at one end of the extrusion die base away from the extrusion hole, and the push-pull screen changing mechanism includes a mounting base, a movable slide, a push-pull cylinder and a filter plate. The mounting base is connected to the extrusion die base, and a filter chamber connected to the flow channel chamber is provided in the mounting base, and a push-pull chute is provided in the mounting base, and the push-pull chute is vertically connected to the filter chamber. The movable slide is located in the push-pull chute and can move relative to the push-pull chute. The movable slide is provided with at least two filter plates along its length. The movable end of the push-pull cylinder is connected to the movable slide. The push-pull cylinder is used to adjust the position of the filter plate. The filter plate is used to filter the molten material entering the flow channel chamber.

2. The extrusion die structure of the flame retardant masterbatch granulator according to claim 1, characterized in that: The push-pull screen changing mechanism also includes a plurality of heating tubes. The mounting seat is provided with a plurality of accommodating holes. The heating tubes are located in the accommodating holes and are used to heat the mounting seat.

3. The extrusion die structure of the flame retardant masterbatch granulator according to claim 1, characterized in that: The pelletizing mechanism includes a driving motor, a rotating spindle, a knife holder and a scraper; The output shaft of the driving motor is connected to the rotating main shaft, and the driving motor is used to drive the rotating main shaft to rotate. A plurality of the clamping tool seats are arranged along the circumferential direction of the rotating main shaft. The scraper is fastened to the clamping tool seat by bolts. The edge of the scraper is provided with a cutting edge, and the cutting edge abuts against the side wall of the extrusion die seat.

4. The extrusion die structure of the flame retardant masterbatch granulator according to claim 3, characterized in that: The number of the scrapers is three.

5. The extrusion die structure of the flame retardant masterbatch granulator according to claim 1, characterized in that: Limiting slides are respectively provided at the upper and lower ends of the push-pull slide, and the movable slide is located in the limiting slides.

6. The extrusion die structure of the flame retardant masterbatch granulator according to claim 1, characterized in that: The movable slide plate is provided with a positioning slot hole, and the filter plate is embedded in the positioning slot hole.

7. The extrusion die structure of the flame retardant masterbatch granulator according to claim 1, characterized in that: Anti-slip limit seats are provided at both ends of the movable slide, and the anti-slip limit seats are used to limit the movable slide from slipping out of the push-pull slide groove.

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