Centering retaining device of extruder

Abstract

The utility model discloses a centering retaining device of an extruder. The centering retaining device comprises a machine body, a barrel body, a screw rod, a driving part and a supporting assembly, one end of the cylinder is fixedly connected with the machine body, and an inner cavity of the cylinder is communicated with an inner cavity of the machine body. The screw is located in the barrel, one end of the screw is inserted into the machine body, and a discharging area is formed between the barrel and the screw. The driving part is used for driving the screw to rotate around the axis of the screw. The supporting assembly is arranged in the barrel and located at the end, away from the machine body, of the barrel, the end, away from the machine body, of the screw penetrates through and is rotationally connected to the supporting assembly, and a plurality of discharging holes are formed in the supporting assembly and communicate with the discharging area. The supporting assembly can support the end, away from the machine body, of the screw and does not interfere with autorotation of the screw, so that friction between the screw and the barrel caused by deformation of the screw is avoided, the screw and the barrel are effectively protected, and the service life of the screw and the service life of the barrel are prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to extruder technical field especially relates to a kind of extruder centering holding device. BACKGROUND

[0002] In BOPP film industry, extruder screw is usually positioned and supported only by one end and driven, and the other end is completely in a suspended state, so that the extruder, in the process of shearing, plasticizing and pushing plastic, continuously extrudes and rubs with barrel at high strength at the suspended end, which accelerates the wear of screw and barrel, causes abnormal problems such as product carrying metal powder, large pressure fluctuation of extruder, excessive vibration of extruder, large driving load of extruder, and shortens the service life of screw and barrel. SUMMARY

[0003] The utility model aims at at least one of the technical problems in the related art to some extent. To this end, the utility model provides an extruder centering holding device.

[0004] The utility model embodiment provides a kind of extruder centering holding device, the extruder centering holding device includes:

[0005] Machine body;

[0006] Barrel, one end of the barrel is fixedly connected with the machine body, and the inner cavity of the barrel is communicated with the inner cavity of the machine body;

[0007] Screw, located in the barrel, one end of the screw is inserted into the machine body, and a discharging area is formed between the barrel and the screw;

[0008] Driving component, for driving the screw to rotate around the axis of the screw;

[0009] Supporting assembly, located in the barrel and at one end of the barrel away from the machine body, one end of the screw away from the machine body is arranged and rotationally connected to the supporting assembly, the supporting assembly is provided with a plurality of discharge holes, and the discharge holes are communicated with the discharging area.

[0010] The extruder centering holding device according to the utility model embodiment has at least the following technical effects: the supporting assembly can support one end of the screw away from the machine body without interfering with the rotation of the screw, so that friction between the screw and the barrel caused by deformation of the screw is avoided, the screw and the barrel are effectively protected, and the service life of the screw and the barrel is improved.

[0011] According to some embodiments of the utility model, the barrel and the screw are coaxially arranged.

[0012] According to some embodiments of the utility model, the inner wall of the barrel is equipped with a first annular groove, the first annular groove extends through the left end face of the barrel to the left, the support assembly includes a first mounting ring, a second mounting ring and a bearing, the first mounting ring is located in the first annular groove, the first mounting ring is fixedly connected with the barrel, the bearing is located on the inner side of the first mounting ring, the second mounting ring is located between the first mounting ring and the bearing, the second mounting ring is equipped with the discharge hole, the screw rod is connected with the bearing through the penetration and rotation.

[0013] According to some embodiments of the utility model, the inner peripheral wall of the first mounting ring is equipped with a first annular protrusion, the outer peripheral wall of the second mounting ring is attached to the inner peripheral wall of the first mounting ring, the first annular protrusion is located on the left side of the second mounting ring, the right side wall of the first annular groove is located on the right side of the second mounting ring, the first annular protrusion and the right side wall of the first annular groove jointly limit the movement of the second mounting ring in the left-right direction.

[0014] According to some embodiments of the utility model, the inner peripheral wall of the second mounting ring is equipped with a second annular protrusion, the outer peripheral wall of the bearing is attached to the inner peripheral wall of the second mounting ring, the second annular protrusion is located on the left side of the bearing, and the second annular protrusion limits the left movement of the bearing.

[0015] According to some embodiments of the utility model, the support assembly further includes a shaft sleeve, the shaft sleeve is penetrated through the bearing and is rotationally connected with the bearing, the outer peripheral wall of the shaft sleeve is attached to the inner peripheral wall of the bearing, the left end of the screw rod is inserted into the shaft sleeve, and the shaft sleeve supports the left end of the screw rod.

[0016] According to some embodiments of the utility model, the right end face of the shaft sleeve is recessed to the left to form a tapered groove, the inner diameter of the tapered groove gradually decreases from right to left, the left end of the screw rod is provided with a tapered portion, the tapered portion is inserted into the tapered groove, and the outer peripheral wall of the tapered portion is attached to the inner groove wall of the tapered groove.

[0017] According to some embodiments of the utility model, the support assembly further includes an annular backing plate, the annular backing plate is located between the shaft sleeve and the second mounting ring, and the left end face of the annular backing plate is attached to the right end face of the bearing.

[0018] According to some embodiments of the utility model, the inner peripheral wall of the second mounting ring is equipped with a second annular groove, the outer peripheral wall of the shaft sleeve is equipped with a third annular groove, the outer side of the annular backing plate is inserted into the second annular groove, and the inner side of the annular backing plate is inserted into the third annular groove.

[0019] According to some embodiments of the utility model, a plurality of discharge holes are distributed circumferentially along the second mounting ring.

[0020] Additional aspects and advantages of the present utility model will be partially given in the following description, some will become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

[0022] Figure 1 is the structure diagram of the extruder centering holding device of some embodiments of the present utility model;

[0023] Figure 2 is the explosion drawing of the extruder centering holding device of some embodiments of the present utility model;

[0024] Figure 3 is the sectional view of the extruder centering holding device of some embodiments of the present utility model;

[0025] Figure 4 is the enlarged view of A of Figure 3 ;

[0026] Figure 5 is the explosion sectional view of the partial structure of the extruder centering holding device of some embodiments of the present utility model;

[0027] Figure 6 is the explosion drawing of the partial structure of the extruder centering holding device of some embodiments of the present utility model.

[0028] LIST OF ELEMENTS IN THE DRAWINGS

[0029] Machine body 100, barrel 110, screw 120, driving part 130, first annular groove 140, discharge area 150;

[0030] Support assembly 200, discharge hole 201, first mounting ring 210, first annular convex part 211, second mounting ring 220, second annular convex part 221, bearing 230, shaft sleeve 240, conical groove 241, taper part 250, annular backing plate 260, second annular groove 270, third annular groove 280. DETAILED DESCRIPTION

[0031] The embodiments of the present utility model will be described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present utility model, and cannot be understood as limiting the present utility model.

[0032] In the description of the utility model, it is understood that the orientation description, such as the left, right and other indications of orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0033] In the description of the utility model, the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, and above, below and the like are included in the number.If the first and second are described, they are only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0034] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation and connection should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0035] The utility model embodiment is further described below with reference to the drawings.

[0036] According to some embodiments of the utility model, referring to Figures 1 to 6 The extruder centering retaining device comprises a machine body 100, a barrel 110, a screw 120, a driving component 130 and a support assembly 200. The right end of the barrel 110 is fixedly connected with the machine body 100, and the inner cavity of the barrel 110 is in communication with the inner cavity of the machine body 100. The screw 120 is located in the barrel 110, and the barrel 110 and the screw 120 are coaxially arranged, the axis direction of the screw 120 is the left-right direction, the right end of the screw 120 is inserted into the machine body 100, and the inner peripheral wall of the barrel 110 and the outer peripheral wall of the screw 120 form a discharging area 150. The driving end of the driving component 130 is fixedly connected with the right end of the screw 120, the driving component 130 can drive the screw 120 to rotate around the axis of the screw 120, so that the material in the machine body 100 enters the discharging area 150 and moves from right to left under the rotation of the screw 120. The support assembly 200 is arranged in the barrel 110 and located at the left end of the barrel 110, the left end of the screw 120 penetrates and is rotatably connected with the support assembly 200, the support assembly 200 is provided with a plurality of discharging holes 201, the discharging holes 201 are in communication with the discharging area 150, and the material in the discharging area 150 is discharged from right to left through the discharging holes 201 under the rotation of the screw 120.

[0037] It can be understood that the supporting assembly 200 can support the left end of the screw rod 120 and does not interfere with the rotation of the screw rod 120, thereby avoiding deformation of the screw rod 120 under long-time work, affecting the work, and even causing friction between the screw rod 120 and the barrel 110 to damage the equipment, effectively protecting the screw rod 120 and the barrel 110, thereby prolonging the service life of the screw rod 120 and the barrel 110.

[0038] According to some embodiments of the utility model, referring to Figures 4 to 6 The inner wall of the barrel 110 is provided with a first annular groove 140, the first annular groove 140 penetrates the left end face of the barrel 110 to the left, the supporting assembly 200 comprises a first mounting ring 210, a second mounting ring 220 and a bearing 230, the first mounting ring 210 is located in the first annular groove 140, the first mounting ring 210 is fixedly connected with the barrel 110, the bearing 230 is located on the inner side of the first mounting ring 210, the second mounting ring 220 is located between the first mounting ring 210 and the bearing 230, the second mounting ring 220 is provided with a discharge hole 201, a plurality of discharge holes 201 are distributed along the circumference of the second mounting ring 220, the left end of the screw rod 120 is arranged through and rotatably connected with the bearing 230, the bearing 230 can support the left end of the screw rod 120, and the screw rod 120 and the bearing 230 can rotate relative to each other, thereby avoiding friction between the screw rod 120 and the barrel 110.

[0039] Preferably, referring to Figures 4 to 6 The inner circumferential wall of the first mounting ring 210 is provided with a first annular protrusion 211, the outer circumferential wall of the second mounting ring 220 is attached to the inner circumferential wall of the first mounting ring 210, the first annular protrusion 211 is located on the left side of the second mounting ring 220, the right side wall of the first annular groove 140 is located on the right side of the second mounting ring 220, the first annular protrusion 211 and the right side wall of the first annular groove 140 jointly limit the movement of the second mounting ring 220 in the left-right direction, thereby avoiding the second mounting ring 220 from being separated from the barrel 110.

[0040] Preferably, referring to Figures 4 to 6 The inner circumferential wall of the second mounting ring 220 is provided with a second annular protrusion 221, the outer circumferential wall of the bearing 230 is attached to the inner circumferential wall of the second mounting ring 220, the second annular protrusion 221 is located on the left side of the bearing 230, and the second annular protrusion 221 limits the left movement of the bearing 230, thereby avoiding the bearing 230 from moving to the left and being separated from the barrel 110.

[0041] According to some embodiments of the utility model, referring to Figures 4 to 6The support assembly 200 further comprises a shaft sleeve 240, the shaft sleeve 240 is arranged in the bearing 230 and is rotationally connected with the bearing 230, the outer peripheral wall of the shaft sleeve 240 is attached to the inner peripheral wall of the bearing 230, the left end of the screw rod 120 is inserted into the shaft sleeve 240, and the shaft sleeve 240 supports the left end of the screw rod 120; when the screw rod 120 rotates, the shaft sleeve 240 can rotate around its own axis relative to the bearing 230.

[0042] Preferably, referring to Figure 5 The right end of the shaft sleeve 240 is left concave to form a tapered groove 241, the inner diameter of the tapered groove 241 gradually decreases from right to left, the left end of the screw rod 120 is provided with a tapered portion 250, the tapered portion 250 is inserted into the tapered groove 241, and the outer peripheral wall of the tapered portion 250 is attached to the inner groove wall of the tapered groove 241; the tapered design can facilitate the mutual positioning of the screw rod 120 and the shaft sleeve 240.

[0043] According to some embodiments of the present application, referring to Figure 4 The support assembly 200 further comprises an annular backing plate 260, the annular backing plate 260 is located between the shaft sleeve 240 and the second mounting ring 220, the left end surface of the annular backing plate 260 is attached to the right end surface of the bearing 230, and the annular backing plate 260 can block the material from entering the bearing 230, thereby avoiding the influence of the material on the working of the bearing 230.

[0044] According to some embodiments of the present application, referring to Figures 4 to 6 The inner peripheral wall of the second mounting ring 220 is provided with a second annular groove 270, the outer peripheral wall of the shaft sleeve 240 is provided with a third annular groove 280, the outer side of the annular backing plate 260 is inserted into the second annular groove 270, the inner side of the annular backing plate 260 is inserted into the third annular groove 280, and the second mounting ring 220 and the shaft sleeve 240 jointly limit the movement of the annular backing plate 260 in the left-right direction.

[0045] In the description of the present application, the description referring to the term "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An extruder centering retention device characterized by, The utility model relates to a screw feeder, which comprises: a machine body (100); a barrel (110) fixedly connected to one end of the machine body (100), the inner cavity of the barrel (110) being in communication with the inner cavity of the machine body (100); a screw (120) located in the barrel (110), one end of the screw (120) being inserted into the machine body (100), and the barrel (110) and the screw (120) forming a discharging area (150); a driving component (130) for driving the screw (120) to rotate about the axis of the screw (120); a support assembly (200) located in the barrel (110) and at the end of the barrel (110) away from the machine body (100), the end of the screw (120) away from the machine body (100) being threaded through and rotationally connected to the support assembly (200), and the support assembly (200) being provided with a plurality of discharging holes (201) in communication with the discharging area (150).

2. The extruder centering retention device of claim 1, wherein, The barrel (110) is coaxially arranged with the screw (120).

3. The extruder centering retention device of claim 1, wherein, The inner wall of the barrel (110) is provided with a first annular groove (140) extending through the left end face of the barrel (110), the support assembly (200) comprises a first mounting ring (210), a second mounting ring (220) and a bearing (230), the first mounting ring (210) is located in the first annular groove (140), the first mounting ring (210) is fixedly connected to the barrel (110), the bearing (230) is located on the inner side of the first mounting ring (210), the second mounting ring (220) is located between the first mounting ring (210) and the bearing (230), the second mounting ring (220) is provided with the discharging holes (201), and the screw (120) is threaded through and rotationally connected to the bearing (230).

4. The extruder centering retention device of claim 3, wherein, The inner peripheral wall of the first mounting ring (210) is provided with a first annular protrusion (211), the outer peripheral wall of the second mounting ring (220) is fitted to the inner peripheral wall of the first mounting ring (210), the first annular protrusion (211) is located on the left side of the second mounting ring (220), the right side wall of the first annular groove (140) is located on the right side of the second mounting ring (220), and the first annular protrusion (211) and the right side wall of the first annular groove (140) jointly limit the movement of the second mounting ring (220) in the left-right direction.

5. The extruder centering retention device of claim 3, wherein, The inner peripheral wall of the second mounting ring (220) is provided with a second annular protrusion (221), the outer peripheral wall of the bearing (230) is fitted to the inner peripheral wall of the second mounting ring (220), the second annular protrusion (221) is located on the left side of the bearing (230), and the second annular protrusion (221) limits the leftward movement of the bearing (230).

6. The extruder centering retention device of claim 3, wherein, The support assembly (200) further comprises a shaft sleeve (240) penetrating the bearing (230) and rotatably connected with the bearing (230), an outer peripheral wall of the shaft sleeve (240) is fitted to an inner peripheral wall of the bearing (230), a left end of the screw rod (120) is inserted into the shaft sleeve (240), and the shaft sleeve (240) supports the left end of the screw rod (120).

7. The extruder centering retention device of claim 6, wherein, A right end of the shaft sleeve (240) is concave leftward to form a tapered groove (241) with a gradually decreasing inner diameter from right to left, a left end of the screw rod (120) is provided with a tapered portion (250) inserted into the tapered groove (241), and an outer peripheral wall of the tapered portion (250) is fitted to an inner groove wall of the tapered groove (241).

8. The extruder centering retention device of claim 6, wherein, The support assembly (200) further comprises an annular backing plate (260) located between the shaft sleeve (240) and the second mounting ring (220), and a left end face of the annular backing plate (260) is fitted to a right end face of the bearing (230).

9. The extruder centering retention device of claim 8, wherein, An inner peripheral wall of the second mounting ring (220) is provided with a second annular groove (270), an outer peripheral wall of the shaft sleeve (240) is provided with a third annular groove (280), an outer side of the annular backing plate (260) is inserted into the second annular groove (270), and an inner side of the annular backing plate (260) is inserted into the third annular groove (280).

10. The extruder centering retention device of claim 3, wherein, A plurality of the discharge holes (201) are distributed circumferentially along the second mounting ring (220).

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