Bamboo-plastic material internal mixer with hollow screw rod for heating

Abstract

The utility model discloses a bamboo-plastic material internal mixer with a hollow screw rod for heating, which relates to the field of bamboo-plastic material processing equipment and comprises a rack, a driving device arranged on one side of the rack, two fixing seats arranged on the rack, an internal mixing shell rotatably arranged on the two fixing seats, a screw rod assembly arranged in the internal mixing shell and connected with the driving device, and a hollow screw rod arranged in the internal mixing shell and connected with the screw rod assembly. The heating device is arranged between the internal mixing shell and the screw rod assembly; and the heating uniformity in the internal mixing process can be improved, so that the internal mixing effect is improved, and the internal mixing quality of materials is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to bamboo plastic material processing equipment field, specifically is bamboo plastic material internal mixer with hollow screw rod heating. BACKGROUND

[0002] The traditional bamboo plastic material internal mixer mostly adopts the form such as setting up heating jacket outside the internal mixing shell in heating mode, this kind of heating mode can easily lead to the problem of uneven heating, because heat needs to be transferred from the outside of the internal mixing shell to the internal material, in this process, the part of material close to the internal mixing shell wall is heated faster, and the center part is relatively slow, leading to the whole material is not consistent in heating, and the plasticizing effect is poor. Because of uneven heating, the material close to the internal mixing shell wall can have been over plasticized, and the material in the center part has not been fully melted and mixed with bamboo fiber, thereby affecting the internal mixing quality of the material. SUMMARY

[0003] The utility model aims at providing bamboo plastic material internal mixer with hollow screw rod heating, which can improve the uniformity of heating in the internal mixing process, thereby improving the internal mixing effect and ensuring the internal mixing quality of the material.

[0004] The above-mentioned optimization structure of the utility model is realized by the following technical scheme: bamboo plastic material internal mixer with hollow screw rod heating, comprising a rack,

[0005] A driving device is arranged on one side of the rack.

[0006] Two fixed seats are arranged on the rack.

[0007] An internal mixing shell is rotatably arranged on the two fixed seats.

[0008] A screw rod assembly is arranged in the internal mixing shell and connected with the driving device.

[0009] A heating device is arranged between the internal mixing shell and the screw rod assembly.

[0010] In some embodiments, the screw rod assembly includes a first hollow screw rod, which is rotatably arranged in the internal mixing shell and connected with the driving device.

[0011] A second hollow screw rod is arranged in parallel with the first hollow screw rod and engages with the first hollow screw rod.

[0012] A transmission member is arranged between the first hollow screw rod and the second hollow screw rod.

[0013] A first cavity is arranged in the first hollow screw rod.

[0014] A second cavity is arranged in the second hollow screw rod;

[0015] A flow guide assembly is arranged in the first cavity or the second cavity.

[0016] In some embodiments, the transmission member comprises a driving gear coaxially sleeved on the first hollow screw rod;

[0017] A driven gear coaxially sleeved on the second hollow screw rod;

[0018] An indirect gear set engaged with the driving gear and the driven gear.

[0019] In some embodiments, the flow guide assembly comprises a rotating rod coaxially arranged in the first cavity or the second cavity;

[0020] A flow guide fin arranged between the rotating rod and the inner wall of the first cavity or the second cavity.

[0021] In some embodiments, the heating device comprises a delivery pump;

[0022] A heating member connected with the delivery pump;

[0023] A liquid inlet pipe connected with the first cavity, the second cavity, the heating member and the mixing chamber;

[0024] A liquid outlet pipe connected with the first cavity, the second cavity and the mixing chamber;

[0025] A liquid outlet cavity coaxially arranged with the first cavity and connected with the delivery pump.

[0026] In some embodiments, the heating device further comprises a fixing ring rotationally and sealingly connected with the first hollow screw rod and the second hollow screw rod, and connected with the liquid inlet pipe or the liquid outlet pipe.

[0027] In some embodiments, a ring groove is arranged in the fixing ring, and a plurality of through holes are annularly arranged on the first hollow screw rod and the second hollow screw rod, and the through holes are arranged between the ring groove and the first cavity or the second cavity.

[0028] In summary, the utility model has the following beneficial effects:

[0029] The utility model discloses a first cavity, second cavity and dense mixing shell are passed to the heating medium by heating device, make first hollow screw rod, second hollow screw rod and dense mixing shell heat, thereby realize the heating of the inside and outside of dense mixing shell simultaneously, thereby promote the uniformity of material heating, make material plasticization more uniform, ensure the processing quality of bamboo plastic material. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 It is the structure schematic drawing of the utility model;

[0031] Fig. 2 It is the cross section view of screw rod subassembly in dense mixing shell of the utility model.

[0032] 1, rack;2, drive arrangement;3, fixed base;4, dense mixing shell;5, screw rod subassembly;51, first hollow screw rod;52, second hollow screw rod;53, transmission part;531, driving gear;532, driven gear;54, first cavity;55, second cavity;56, flow guide subassembly;561, rotary rod;562, flow guide fin;6, heating device;61, heating part;62, liquid inlet pipe;63, liquid outlet pipe;64, liquid outlet cavity;65, fixed ring. DETAILED DESCRIPTION

[0033] The technical schemes in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0034] REFERENCE Figs. 1-2The application discloses a hollow screw heating bamboo plastic material internal mixer, which comprises a rack 1, a driving device 2, two fixed seats 3, an internal mixing shell 4, a screw assembly 5 and a heating device 6. The rack 1 is a supporting structure of the whole internal mixer and can be made of high-strength steel to ensure the stability and durability of the equipment. The driving device 2 is arranged on one side of the rack 1 and can provide power for the screw assembly 5 to rotate in the internal mixing shell 4. The driving device 2 can be in the form of a motor combined with a speed reducer. The high-speed rotation output by the motor is decelerated and the torque is increased by the speed reducer to meet the torque requirement of the screw assembly 5. The two fixed seats 3 are arranged on the rack 1 and can be fastened to the rack 1 through bolts. The internal mixing shell 4 is rotatably arranged on the two fixed seats 3 and can be made of high-temperature-resistant and corrosion-resistant alloy steel. The internal mixing shell 4 has a certain space inside and is used for accommodating materials and the screw assembly 5 to perform internal mixing operation. The two ends of the internal mixing shell 4 can be connected with the fixed seats 3 through bearings and can be connected with the driving device 2, so that the internal mixing shell 4 can stably rotate under the driving of the driving device 2 to realize the opening and closing of the internal mixing shell 4 and to realize the feeding, discharging and internal mixing operations. This is the prior art and will not be repeated here. The screw assembly 5 is arranged in the internal mixing shell 4 and is connected with the driving device 2. The rotation of the screw realizes the conveying, mixing and shearing of the materials. The heating device 6 is arranged between the internal mixing shell 4 and the screw assembly 5 and can provide heat for the internal mixing process to uniformly heat the materials.

[0035] In some embodiments, the screw assembly 5 comprises a first hollow screw 51, a second hollow screw 52, a transmission member 53, a first cavity 54, a second cavity 55 and a flow guide assembly 56. The first hollow screw 51 is rotatably arranged in the internal mixing shell 4 and is connected with the driving device 2. One end of the first hollow screw 51 can be connected with the output shaft of the speed reducer through a shaft coupling and rotates under the driving of the driving device 2. The first hollow screw 51 is internally provided with the first cavity 54 for the introduction of heating medium such as heat conducting oil or hot water to heat the screw itself and directly heat the materials. The second hollow screw 52 is arranged in parallel with the first hollow screw 51 and is engaged with the first hollow screw 51. The second hollow screw 52 is internally provided with the second cavity 55 for the introduction of heating medium. The transmission member 53 is arranged between the first hollow screw 51 and the second hollow screw 52 to realize the power transmission between the two screws and ensure the synchronous rotation of the two screws to uniformly mix the materials in the internal mixing process. The flow guide assembly 56 is arranged in the first cavity 54 or the second cavity 55 to guide the flow of the heating medium and improve the heating efficiency. When the first hollow screw 51 rotates, the second hollow screw 52 is driven by the transmission member 53 to rotate in the opposite direction synchronously. The opposite rotation of the two screws can form strong shearing and stirring effects on the materials to fully mix the materials in the internal mixing shell 4. The engagement of the second hollow screw 52 with the first hollow screw 51 to realize the shearing and stirring of the materials is the prior art and the specific engagement structure and principle will not be repeated here.

[0036] In some embodiments, the transmission member 53 comprises a driving gear 531, a driven gear 532, and an indirect gear set. The driving gear 531 is coaxially sleeved on the first hollow screw 51 and fixedly connected with the first hollow screw 51. The driven gear 532 is coaxially sleeved on the second hollow screw 52 and fixedly connected with the second hollow screw 52. The indirect gear set is engaged with the driving gear 531 and the driven gear 532. The power transmission between the first hollow screw 51 and the second hollow screw 52 can be achieved through the transmission member 53. The indirect gear set comprises at least two indirect gears. The transmission ratio between the first hollow screw 51 and the second hollow screw 52 can be adjusted through the plurality of indirect gears to adapt to different rotation requirements. The driving gear 531, the driven gear 532, and the indirect gear set can all be made of high-strength alloy steel and subjected to heat treatment to improve their wear resistance and fatigue resistance, thereby ensuring the stability and reliability of the transmission.

[0037] In some embodiments, the flow guide assembly 56 comprises a rotating rod 561 and flow guide vanes 562. The rotating rod 561 is coaxially arranged in the first cavity 54 or the second cavity 55 and can be made of high-temperature-resistant and corrosion-resistant stainless steel. The surface of the rotating rod 561 is subjected to polishing treatment to reduce flow resistance. The flow guide vanes 562 are arranged between the rotating rod 561 and the inner wall of the first cavity 54 or the second cavity 55 and are arranged in a spiral shape. The flow guide vanes 562 can guide the heating medium to flow along the axial direction of the screw, thereby improving the heat exchange efficiency. The flow guide vanes 562 can be made of stainless steel and can be welded and fixed with the rotating rod 561 to ensure good sealing performance and flow guiding effect.

[0038] In some embodiments, the heating device 6 comprises a delivery pump (not shown in the figure), a heating element 61, an inlet pipe 62, an outlet pipe 63, and an outlet cavity 64. The delivery pump can circulate and deliver the heating medium into the screw assembly 5. A high-temperature-resistant and corrosion-resistant centrifugal pump or gear pump can be used. The heating element 61 is connected to the delivery pump and can heat the heating medium. Electric heating can be used. The inlet pipe 62 is connected to the first cavity 54, the second cavity 55, the heating element 61, and the banbury shell 4, respectively. The heated heating medium is delivered into the first cavity 54, the second cavity 55, and the banbury shell 4 through the inlet pipe 62 to heat the material. The outlet pipe 63 is connected to the first cavity 54, the second cavity 55, and the banbury shell 4 to recover the used heating medium. The outlet cavity 64 is coaxially arranged with the first cavity 54 and connected to the delivery pump to collect the delivered heating medium, thereby realizing the circulation of the heating medium. The outlet cavity 64 and the delivery pump can be connected through a delivery pipe. The delivery pipe and the outlet cavity 64 can be connected through a rotating sealing cover. The rotating sealing cover is sleeved on the end of the first hollow screw 51 and can be fixed on the support frame to keep the rotating sealing cover fixed. The first hollow screw 51 can rotate on the rotating sealing cover. A plurality of sealing rings are arranged between the end of the first hollow screw 51 and the rotating sealing cover to realize the connection between the first hollow screw 51 and the rotating sealing cover when the first hollow screw 51 rotates. The end face of the rotating sealing cover away from the first hollow screw 51 is connected with the delivery pipe to realize the flow of the heating medium between the outlet cavity 64 and the delivery pump, and to prevent leakage.

[0039] In some embodiments, the heating device 6 further comprises a fixing ring 65. The fixing ring 65 is rotatably connected to the first hollow screw 51 and the second hollow screw 52 and is connected to the inlet pipe 62 or the outlet pipe 63. The fixing ring 65 can keep the sealing of the connection between the first hollow screw 51 and the second hollow screw 52 when the first hollow screw 51 and the second hollow screw 52 rotate, thereby preventing the heating medium from leaking.

[0040] In some embodiments, the fixing ring 65 is provided with a ring groove. A plurality of through holes are annularly arranged on the first hollow screw 51 and the second hollow screw 52. The through holes are arranged between the ring groove and the first cavity 54 or the second cavity 55. When the heating medium enters the ring groove of the fixing ring 65 through the inlet pipe 62, it enters the first cavity 54 or the second cavity 55 through the through holes, thereby realizing the heating of the screw. Similarly, when the heating medium flows out of the first cavity 54 or the second cavity 55, it enters the ring groove through the through holes and then flows out through the outlet pipe 63.

[0041] The specific working principle is as follows:

[0042] In the specific work, the driving device 2 starts to provide power, which is transmitted to the screw assembly 5. Under the driving of the driving device 2, the first hollow screw 51 rotates, and the second hollow screw 52 synchronously reversely rotates through the transmission of the transmission member 53, which produces strong shearing and stirring effects on the materials in the mixing shell 4.

[0043] At the same time, the conveying pump and the heating member 61 start to work, and the heating member 61 heats the heating medium. The heated heating medium is conveyed into the first cavity 54, the second cavity 55 and the mixing shell 4 through the inlet pipe 62 under the conveying of the conveying pump, and directly heats the materials. The outlet pipe 63 recycles the used heating medium from the first cavity 54, the second cavity 55 and the mixing shell 4, and flows from the outlet cavity 64 to the conveying pump, so as to realize the circulating flow of the heating medium.

[0044] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A bamboo plastic material banburying machine with hollow screw heating, characterized in that: It includes a rack (1); A driving device (2) is arranged on one side of the rack (1); Two fixed seats (3) are arranged on the rack (1); A mixing shell (4) is rotatably arranged on the two fixed seats (3); A screw rod assembly (5) is arranged in the mixing shell (4) and connected with the driving device (2); A heating device (6) is arranged between the mixing shell (4) and the screw rod assembly (5).

2. The bamboo plastic material banbury with hollow screw heating according to claim 1, characterized in that: The screw rod assembly (5) includes a first hollow screw rod (51) rotatably arranged in the mixing shell (4) and connected with the driving device (2); A second hollow screw rod (52) is arranged in parallel with the first hollow screw rod (51) and engaged with the first hollow screw rod (51); A transmission member (53) is arranged between the first hollow screw rod (51) and the second hollow screw rod (52); A first cavity (54) is arranged in the first hollow screw rod (51); A second cavity (55) is arranged in the second hollow screw rod (52); A flow guide assembly (56) is arranged in the first cavity (54) or the second cavity (55).

3. The bamboo plastic material banbury with hollow screw heating according to claim 2, it is characterized by: The transmission member (53) includes a driving gear (531) coaxially sleeved on the first hollow screw rod (51); A driven gear (532) coaxially sleeved on the second hollow screw rod (52); An indirect gear set engaged with the driving gear (531) and the driven gear (532).

4. The bamboo plastic material banbury with hollow screw heating according to claim 2, it is characterized by: The flow guide assembly (56) includes a rotating rod (561) coaxially arranged in the first cavity (54) or the second cavity (55); A flow guide fin (562) arranged between the rotating rod (561) and the inner wall of the first cavity (54) or the second cavity (55).

5. The bamboo plastic material banbury with hollow screw heating according to claim 2, characterized in that: The heating device (6) includes a conveying pump; A heating member (61) connected with the conveying pump; A liquid inlet pipe (62) connected with the first cavity (54), the second cavity (55), the heating member (61), and the mixing shell (4); A liquid outlet pipe (63) connected with the first cavity (54), the second cavity (55), and the mixing shell (4); A liquid outlet cavity (64) coaxially arranged with the first cavity (54) and connected with the conveying pump.

6. The bamboo plastic material banbury with hollow screw heating according to claim 5, it is characterized by: The heating device (6) further includes a fixed ring (65) rotatably and sealingly connected with the first hollow screw rod (51) and the second hollow screw rod (52), and connected with the liquid inlet pipe (62) or the liquid outlet pipe (63).

7. The bamboo plastic material banbury with hollow screw heating according to claim 6, characterized in that: The fixed ring (65) is internally provided with a ring groove, the first hollow screw rod (51) and the second hollow screw rod (52) are annularly provided with a plurality of through holes, and the through holes are arranged between the ring groove and the first cavity (54) or the second cavity (55).

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