Master batch mixing device for flame-retardant sheet

Abstract

The utility model discloses a master batch mixing device for flame-retardant sheets. The master batch mixing device comprises a rack, a master batch bin, a spiral feeder, an outer bin body, an inner bin body and a rotary mixing mechanism, the master batch bin is connected with the spiral feeder, and the spiral feeder is used for conveying raw material master batches on the master batch bin into the inner bin body; the rotary material mixing mechanism is arranged in the inner bin body and comprises a speed reducing motor, a rotating shaft, a connecting arm and a hammer head. The master batch bin can store raw material master batches needed for preparing flame-retardant sheets, when feeding is needed, the raw material master batches with the preset weight can be conveyed into the inner bin body through the spiral feeder, the rotary mixing mechanism can fully stir and mix the various raw material master batches in the inner bin body, and therefore the flame-retardant sheets can be prepared. The influence of non-uniform mixing on the flame-retardant performance of the flame-retardant sheet is avoided; and the connecting arm is in threaded connection with the rotating shaft, and the hammer head is detachably connected with the connecting arm through the bolt fastener, so that the hammer head can be conveniently and quickly replaced, and the maintenance is easy.

Description

Technical Field

[0001] The utility model relates to the field of masterbatch mixing, in particular to a masterbatch mixing device for flame retardant sheets. Background Art

[0002] Decorative film material is a new type of decorative material made from high molecular polymers such as PVC, various additives, calendering and compounding. It can be compounded with wood, plastic plates, aluminum plates, iron plates and other substrates to form multi-purpose decorative materials. It is widely used in household appliances, audio surface decoration, interior decoration, aircraft, ships, and train interior decoration. In order to meet the needs of various products, decorative films are often adjusted by adding additional additives; when it is necessary to improve the flame retardancy of decorative films, flame retardant masterbatches such as halogen flame retardants and phosphorus flame retardants are often added to the raw material masterbatch to improve the flame retardancy of decorative films.

[0003] In the prior art, in the preparation of decorative films with flame retardant properties, it is necessary to fully mix the flame retardant masterbatch with other raw material masterbatch in a certain ratio to avoid the situation where the local concentration is too high or too low. This ensures the overall performance stability of the flame retardant sheet and prevents local performance differences. The traditional masterbatch mixing device uses a universal mixing device, and the feeding process of the raw material masterbatch needs to be manually proportioned and then poured into the mixing barrel for mixing. The feeding process is relatively cumbersome. In addition, the stirring blades in the mixing device will wear out during long-term operation. When replacing the stirring blades, the rotating shaft and the stirring blades need to be disassembled as a whole, and the equipment maintenance is very troublesome.

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

[0005] The technical problem to be solved by the utility model is to provide a master batch mixing device for flame retardant sheets which is convenient for feeding, easy for maintenance and has uniform mixing.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: a masterbatch mixing device for flame retardant sheets, comprising a frame, a masterbatch bin, a screw feeder, an outer bin body, an inner bin body and a rotary mixing mechanism;

[0007] The top of the outer warehouse body is connected to the frame by a shock-absorbing connector, the inner warehouse body is arranged in the outer warehouse body, and the side wall of the outer warehouse body is connected to the side wall of the inner warehouse body by a screw fastener;

[0008] A plurality of masterbatch silos are respectively arranged on the frame, and the masterbatch silos are used to store raw material masterbatch of flame retardant sheet, and each of the masterbatch silos is respectively connected to a screw feeder, and the top of the inner silo body is provided with a feed inlet, and the screw feeder is used to input the raw material masterbatch on the masterbatch silo into the inner silo body through the feed inlet;

[0009] The rotary mixing mechanism is arranged in the inner bin body, and the rotary mixing mechanism includes a reduction motor, a rotating shaft, a connecting arm and a hammer head. The rotating shaft passes through the inner bin body, and the reduction motor is connected to the end of the rotating shaft to drive the rotating shaft to rotate. A plurality of connecting arms are arranged around the circumferential direction of the rotating shaft, and the connecting arms are connected to the rotating shaft through threads. The hammer head is arranged at the end of the connecting arm and is used to stir and mix the raw material masterbatch in the inner bin body as the rotating shaft rotates.

[0010] According to the above technical solution, the masterbatch mixing device for the flame-retardant sheet material further includes a material level detection device, which includes a material level sensor and an audible and visual alarm;

[0011] The material level sensor is arranged in the masterbatch silo to detect the material level of the raw material masterbatch in the masterbatch silo. The sound and light alarm is arranged on the side wall of the masterbatch silo and is electrically connected to the material level sensor to remind the masterbatch silo when it is at the lower limit material level.

[0012] By adopting the above-mentioned technical solutions, in the masterbatch mixing device for flame-retardant sheets, a discharge valve is provided at the bottom of the inner bin body, and the discharge valve is used to communicate with an external discharge pipeline.

[0013] By adopting the above-mentioned technical solutions, in the masterbatch mixing device for the flame-retardant sheet, the area where the rotating shaft is connected to the connecting arm is a rectangular structure, and the rectangular structure has four sides, each of which is provided with a threaded hole, and the threaded hole is connected to the connecting arm by a thread.

[0014] By adopting the above-mentioned technical solutions, in the masterbatch mixing device for flame-retardant sheets, the hammer head is connected to the end of the connecting arm away from the rotating shaft through a bolt fastener, and the end of the hammer head is provided with a curved surface structure.

[0015] By adopting the above-mentioned technical solutions, in the masterbatch mixing device for flame-retardant sheets, the bottom of the outer warehouse body is provided with an avoidance groove, and the avoidance groove is used to avoid the installation of the discharge valve.

[0016] By adopting the above-mentioned technical solutions, in the masterbatch mixing device for flame-retardant sheets, a cover plate is provided on the top of the masterbatch silo, and the cover plate is used to close or open the masterbatch silo.

[0017] By adopting the above-mentioned technical solutions, in the masterbatch mixing device for flame-retardant sheets, the number of the masterbatch silos and the number of the screw feeders are both four.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The masterbatch silo of the utility model can store the raw material masterbatch required for preparing the flame-retardant sheet. When feeding is needed, the raw material masterbatch of preset weight can be delivered to the inner silo body by the screw feeder, and the rotating mixing mechanism can fully stir and mix the various raw material masterbatch in the inner silo body to avoid uneven mixing affecting the flame retardant properties of the flame-retardant sheet. The hammer head of the rotating mixing mechanism is prone to wear during the long-term stirring process, thereby affecting the mixing uniformity of the raw material masterbatch. The connecting arm is connected to the rotating shaft by a thread, and the hammer head and the connecting arm are detachably connected by a bolt fastener, which can facilitate the rapid replacement of the hammer head and easy maintenance. In addition, the mixing device adopts a double-bin structure of an inner silo body and an outer silo body. When the inner silo body is worn, the spiral fastener can be loosened to realize the separate separation and replacement of the inner silo body. It has the beneficial effects of convenient feeding, uniform mixing, and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

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

[0023] Figure 2 It is a schematic diagram of the overall structure of the back side of the utility model;

[0024] Figure 3 It is a schematic diagram of the connection structure between the inner warehouse body and the outer warehouse body of the utility model;

[0025] Figure 4 It is a schematic diagram of the rotating shaft installation structure of the utility model. DETAILED DESCRIPTION

[0026] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, 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.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation 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 arranged component at the same time.

[0028] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0029] like Figures 1 to 4As shown, the embodiment of the utility model provides a masterbatch mixing device for flame-retardant sheets, comprising a frame 1, a masterbatch silo 2, a screw feeder 3, an outer silo 4, an inner silo 5 and a rotating mixing mechanism 6; the top of the outer silo 4 is hoisted and connected to the frame 1 through a shock-absorbing connector 41, the inner silo 5 is arranged in the outer silo 4, and the side wall of the outer silo 4 is connected to the side wall of the inner silo 5 through a screw fastener 42; a plurality of masterbatch silos 2 are respectively arranged on the frame 1, the masterbatch silos 2 are used to store raw material masterbatch of flame-retardant sheets, each of the masterbatch silos 2 is respectively connected to one of the screw feeders 3, the top of the inner silo 5 has a feed inlet 51, and the screw feeder 3 is used to The raw material masterbatch on the masterbatch silo 2 is input into the inner silo body 5 through the feed port 51; the rotary mixing mechanism 6 is arranged in the inner silo body 5, and the rotary mixing mechanism 6 includes a reduction motor 61, a rotating shaft 62, a connecting arm 63 and a hammer head 64. The rotating shaft 62 passes through the inner silo body 5, and the reduction motor 61 is connected to the end of the rotating shaft 62 to drive the rotating shaft 62 to rotate. A plurality of connecting arms 63 are arranged around the circumferential direction of the rotating shaft 62, and the connecting arm 63 is connected to the rotating shaft 62 by a threaded connection. The hammer head 64 is arranged at the end of the connecting arm 63, and is used to stir and mix the raw material masterbatch in the inner silo body 5 as the rotating shaft 62 rotates. In this embodiment, the inner bin body 5 is used as a container for mixing raw material master batches, which will be subject to certain wear and tear. A double bin structure of the inner bin body 5 and the outer bin body 4 is adopted. When the inner bin body 5 is worn, the spiral fastener 42 can be loosened to achieve the separate replacement of the inner bin body 5; and, vibration will occur during the mixing process, and the shock-absorbing connector 41 can reduce the vibration and impact transmission between the outer bin body 4 and the frame 1, thereby protecting the stability of the equipment structure; when feeding is required, the raw material master batches of a preset weight can be delivered to the inner bin body 5 by the screw feeder 3, eliminating the tedious operation of manual batching and pouring, and the rotating mixing mechanism 6 can fully stir and mix the various raw material master batches in the inner bin body 5 to avoid uneven mixing affecting the flame retardant properties of the flame retardant sheet; the hammer head 64 of the rotating mixing mechanism 6 is prone to wear during long-term stirring, thereby affecting the mixing uniformity of the raw material master batches, and the connecting arm 63 is connected to the rotating shaft 62 by a thread, which can facilitate the quick installation of the connecting arm 63, which is practical and convenient.

[0030] like Figure 1 and Figure 2As shown, further, a material level detection device is also included, and the material level detection device includes a material level sensor 71 and an acoustic and optical alarm 72; the material level sensor is arranged in the master batch silo 2, so as to detect the material level of the raw material master batch in the master batch silo 2, and the acoustic and optical alarm 72 is arranged on the side wall of the master batch silo 2, and is electrically connected to the material level sensor 71, so as to remind the master batch silo 2 at the lower limit material level. The material level sensor 71 can monitor the filling status of the raw material master batch in real time, ensure that the raw material master batch in the master batch silo 2 is within the appropriate range, and avoid the material level being too low to affect the normal supply; when the material level sensor 71 detects that the material level in the master batch silo 2 is at the lower limit level, the acoustic and optical alarm 72 will send a warning signal to remind the operator to pay attention to the replenishment of the raw material master batch, so as to avoid the production interruption caused by insufficient raw materials.

[0031] Furthermore, a discharge valve (not shown) is provided at the bottom of the inner warehouse body 5, and the discharge valve is used to communicate with an external discharge pipeline. The discharge valve serves as a discharge port at the bottom of the inner warehouse body 5, and can control the discharge process of the raw material masterbatch. By opening or closing the discharge valve, the flow rate and flow rate of the raw material masterbatch can be controlled to ensure that the raw material masterbatch can be discharged from the inner warehouse body 5 smoothly.

[0032] like Figure 4 As shown, further, the area where the rotating shaft 62 is connected to the connecting arm 63 is a rectangular structure 621, and the rectangular structure 621 has four side surfaces, each of which is provided with a threaded hole 622, and the threaded hole 622 is connected to the connecting arm 63 by threads, and the hammer head 64 is connected to the end of the connecting arm 63 away from the rotating shaft 62 by a bolt fastener 641, and the end of the hammer head 64 is provided with a curved surface structure 642; the hammer head 64 is prone to wear during long-term stirring, thereby affecting the mixing uniformity of the raw material masterbatch, the connecting arm 63 is connected to the rotating shaft 62 by threads, and the hammer head 64 and the connecting arm 63 are detachably connected by bolt fasteners 641, which can facilitate the rapid replacement of the hammer head 64 and easy maintenance. The area where the rotating shaft 62 and the connecting arm 63 are connected is set as a rectangular structure 621, which can improve the connection tightness between the connecting arm 63 and the rotating shaft 62; the arc surface structure 642 set at the end of the hammer head 64 can reduce the excessive extrusion of the raw material masterbatch and protect the particle integrity of the raw material masterbatch.

[0033] Furthermore, the outer warehouse body 4 has an avoidance groove 43 at the bottom, and the avoidance groove 43 is used to avoid the installation of the discharge valve. Through the avoidance groove 43, the operator can easily install, adjust and maintain the discharge valve, thereby improving the operating efficiency.

[0034] like Figure 1 and Figure 2As shown, further, a cover plate 21 is provided on the top of the master batch silo 2, and the cover plate 21 is used to close or open the master batch silo 2. The cover plate 21 can effectively close the master batch silo 2, prevent external impurities, dust or other pollutants from entering the master batch silo 2, and ensure the purity of the raw material master batch.

[0035] like Figure 1 and Figure 2 As shown, further, the number of the master batch silos 2 and the screw feeders 3 are both four. Four sets of master batch silos 2 and screw feeders 3 can feed a variety of raw material master batches simultaneously, thereby improving production efficiency.

[0036] The masterbatch silo 2 of the utility model can store the raw material masterbatch required for preparing the flame-retardant sheet. When feeding is needed, the raw material masterbatch of preset weight can be transported to the inner bin body 5 through the screw feeder 3, and the rotating mixing mechanism 6 can fully stir and mix the various raw material masterbatch in the inner bin body 5 to avoid uneven mixing affecting the flame retardant properties of the flame-retardant sheet. The hammer head 64 of the rotating mixing mechanism 6 is prone to wear during the long-term stirring process, thereby affecting the mixing uniformity of the raw material masterbatch. The connecting arm 63 is connected to the rotating shaft 62 by a thread, and the hammer head 64 and the connecting arm 63 are detachably connected by a bolt fastener 641, which can facilitate the rapid replacement of the hammer head 64 and is easy to maintain. In addition, the mixing device adopts a double bin structure of the inner bin body 5 and the outer bin body 4. When the inner bin body 5 is worn, the spiral fastener 42 can be loosened to realize the separate separation and replacement of the inner bin body 5. It has the beneficial effects of convenient feeding, uniform mixing, and convenient maintenance.

[0037] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. 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 various embodiments of the utility model.

Claims

1. A masterbatch mixing device for flame retardant sheets, characterized in that: It includes a frame, a masterbatch silo, a screw feeder, an outer silo body, an inner silo body and a rotating mixing mechanism; The top of the outer warehouse body is connected to the frame by a shock-absorbing connector, the inner warehouse body is arranged in the outer warehouse body, and the side wall of the outer warehouse body is connected to the side wall of the inner warehouse body by a screw fastener; A plurality of masterbatch silos are respectively arranged on the frame, and the masterbatch silos are used to store raw material masterbatch of flame retardant sheet, and each of the masterbatch silos is respectively connected to a screw feeder, and the top of the inner silo body is provided with a feed inlet, and the screw feeder is used to input the raw material masterbatch on the masterbatch silo into the inner silo body through the feed inlet; The rotary mixing mechanism is arranged in the inner bin body, and the rotary mixing mechanism includes a reduction motor, a rotating shaft, a connecting arm and a hammer head. The rotating shaft passes through the inner bin body, and the reduction motor is connected to the end of the rotating shaft to drive the rotating shaft to rotate. A plurality of connecting arms are arranged around the circumferential direction of the rotating shaft, and the connecting arms are connected to the rotating shaft through threads. The hammer head is arranged at the end of the connecting arm and is used to stir and mix the raw material masterbatch in the inner bin body as the rotating shaft rotates.

2. The masterbatch mixing device for flame retardant sheets according to claim 1, characterized in that: It also includes a material level detection device, which includes a material level sensor and an audible and visual alarm; The material level sensor is arranged in the masterbatch silo to detect the material level of the raw material masterbatch in the masterbatch silo. The sound and light alarm is arranged on the side wall of the masterbatch silo and is electrically connected to the material level sensor to remind the masterbatch silo when it is at the lower limit material level.

3. The masterbatch mixing device for flame retardant sheets according to claim 1, characterized in that: A discharge valve is provided at the bottom of the inner bin body, and the discharge valve is used to communicate with an external discharge pipeline.

4. The masterbatch mixing device for flame retardant sheets according to claim 1, characterized in that: The area where the rotating shaft is connected to the connecting arm is a rectangular structure, and the rectangular structure has four side surfaces. Each of the side surfaces is provided with a threaded hole, and the threaded hole is connected to the connecting arm through threads.

5. The masterbatch mixing device for flame retardant sheets according to claim 4, characterized in that: The hammer head is connected to an end of the connecting arm away from the rotating shaft through a bolt fastener, and an end of the hammer head is provided with a curved surface structure.

6. The masterbatch mixing device for flame retardant sheets according to claim 3, characterized in that: The bottom of the outer warehouse body is provided with an avoidance groove, and the avoidance groove is used for avoiding the installation of the discharge valve.

7. The masterbatch mixing device for flame retardant sheets according to claim 1, characterized in that: A cover plate is provided on the top of the master batch silo, and the cover plate is used to close or open the master batch silo.

8. The masterbatch mixing device for flame retardant sheets according to claim 1, characterized in that: The number of the master batch silos and the number of the screw feeders are both four.

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