阅读说明：本技术 一种双螺杆挤出机用可调排气盖板 (Adjustable exhaust cover plate for double-screw extruder ) 是由 吕发炫 何浩明 于 2021-09-01 设计创作，主要内容包括：本发明涉及一种排气盖板,具体地说,涉及一种双螺杆挤出机用可调排气盖板。其包括挤出机本体和盖体,挤出机本体包括筒体和螺杆,所述筒体内沿设备轴向贯穿开设有内孔,内孔内转动有两根螺杆,两个螺杆相互啮合转动,盖体包括滑块和调节螺钉,调节螺钉设置在滑块顶部。本发明中通过设置的滑块和调节螺钉与盖板顶部对应开设的滑孔滑动连接,以带动滑块移动并改变盖板与螺杆之间的间隙,从而强化间隙形成的空腔内改性塑料流动,降低区域内材料的滞留,避免焦料的产生,进而解决产生的焦料对产品质量影响的问题。(The invention relates to an exhaust cover plate, in particular to an adjustable exhaust cover plate for a double-screw extruder. The extruder comprises an extruder body and a cover body, wherein the extruder body comprises a barrel body and screw rods, an inner hole is formed in the barrel body in a penetrating mode along the axial direction of equipment, the two screw rods are rotated in the inner hole in an meshed mode, the cover body comprises a sliding block and an adjusting screw, and the adjusting screw is arranged at the top of the sliding block. According to the invention, the sliding block and the adjusting screw are in sliding connection with the sliding hole correspondingly formed in the top of the cover plate, so that the sliding block is driven to move and the gap between the cover plate and the screw is changed, the flow of modified plastics in a cavity formed by the gap is strengthened, the retention of materials in the area is reduced, the generation of coke materials is avoided, and the problem that the generated coke materials influence the product quality is solved.)

1. The utility model provides an adjustable exhaust cover plate for double screw extruder, includes extruder body (100) and lid (200), and extruder body (100) includes barrel (110) and screw rod (120), run through along the equipment axial in barrel (110) and seted up two crossing hole (111), and hole (111) internal rotation has two screw rods (120), and two screw rod (120) intermeshing rotate, and lid (200) are including apron (210), and apron (210) set up at hole (111) top, and gas vent (211) have been seted up at the top of apron (210), and gas vent (211) and hole (111) intercommunication, its characterized in that: the cover body (200) further comprises a sliding block (220) and an adjusting screw (230), wherein the adjusting screw (230) is arranged at the top of the sliding block (220) and is in sliding connection with a sliding hole (212) correspondingly formed in the top of the cover plate (210) and used for driving the sliding block (220) to move and changing a gap between the cover plate (210) and the screw rod (120).

2. The adjustable vent cover plate for the twin-screw extruder of claim 1, wherein: the adjusting screws (230) are provided with five adjusting screws (230), the five adjusting screws (230) are arranged along the axial direction, wherein the three adjusting screws (230) apply tension to the sliding block, and the two adjusting screws (230) apply pressure to the sliding block, so that the function of fixing the position of the sliding block (220) is achieved.

3. The adjustable vent cover plate for the twin-screw extruder of claim 2, wherein: and five adjusting screws (230) are in threaded connection with the sliding holes (212).

4. The adjustable vent cover plate for the twin-screw extruder of claim 2, wherein: the five adjusting screws (230) are connected with the sliding holes (212) in a sliding mode, and the sliding holes (212) are tightly attached to the adjusting screws (230).

5. The adjustable vent cover plate for the twin-screw extruder of claim 1, wherein: the bottom of the sliding block (220) is provided with a strengthening surface, the strengthening surface comprises a strengthening part (221), the strengthening part (221) inclines to one side of the exhaust port (211), the height of one side of the exhaust port (211) is higher than that of the other side of the exhaust port, and in addition, the strengthening part (221) inclines to the direction close to the meshing part of the screw rod (120) on the side where the modified plastic is extruded.

6. The adjustable vent cover plate for the twin screw extruder of claim 5, wherein: the reinforced surface further comprises a reserved portion (223), and the reserved portion (223) is an inwards concave arc-shaped surface to attach to the screw (120).

7. The adjustable vent cover plate for the twin screw extruder of claim 5, wherein: the bottom of the strengthening part (221) is provided with a pressing plate (224), and an elastic connecting assembly (225) is arranged between the pressing plate (224) and the strengthening part (221).

8. The adjustable vent cover plate for the twin screw extruder of claim 7, wherein: the elastic connecting assembly (225) comprises four sliding columns (2251), four corners of the pressing plate (224) are respectively arranged and are in sliding connection with the reinforcing part (221), a spring (2252) is further arranged at the joint, and the spring (2252) is arranged longitudinally.

9. The adjustable vent cover plate for the twin screw extruder of claim 8, wherein: the bottom end of clamp plate (224) is connected through the hinge rotation with reinforcer (221), and elastic connection subassembly (225) includes keysets (2253), keysets (2253) set up the one side that the modified plastics of clamp plate (224) extruded, keysets (226) have been seted up on slider (220) corresponding keysets (2253) pivoted route, keysets (2253) and keysets (226) swing joint, set up on the inside of keysets (226) and be circular arc guide way (2261) with the hinge, sliding connection has the spliced pole in guide way (2261), spliced pole and keysets (2253) fixed connection, keysets (2253) are through the spliced pole and set up spring (2252) fixed connection in guide way (2261).

10. The adjustable vent cover plate for the twin screw extruder of claim 9, wherein: the spring (2252) is disposed along the guide groove (2261).

Technical Field

The invention relates to an exhaust cover plate, in particular to an adjustable exhaust cover plate for a double-screw extruder.

Background

In the plastic processing industry, co-rotating twin-screw extrusion is widely used, and the main application fields are the production of modified plastics, such as plastic alloys, toughened plastics, reinforced plastics, various special blended plastic materials with special performance requirements, reactive extrusion processing and the like, and certainly, twin-screw extruders have a lot of applications in the production of products, such as the processing of UPVC products and the like. Generally, the twin-screw extruder is equipped with a vent device, and the purpose of the vent device is to discharge a small amount of low molecular weight substances contained in the material by a natural pressure difference (generally referred to as natural vent) or to forcibly discharge the low molecular weight substances by evacuation (generally referred to as vacuum vent).

At present, the exhaust port of the domestic and foreign double-screw extruder adopts a structure with a screw barrel open hole and a fixed cover plate, the cover plate in the structure is a whole part, the position of a pressure plate cannot be adjusted, the adaptability to different viscosity materials is insufficient, the situation that the processed materials are abnormally emitted from the exhaust port frequently occurs in the production and processing process, and the material retention and even coke material are generated on the inner surface of the cover plate, so that the adverse effect is generated on the production process and the product quality.

Disclosure of Invention

The invention aims to provide an adjustable exhaust cover plate for a double-screw extruder, which aims to solve the problem that the material retention and even coke material are generated on the inner surface of the cover plate in the background technology, so that the production process and the product quality are adversely affected.

In order to realize the above purpose, an adjustable exhaust cover plate for a double-screw extruder is provided, including extruder body and lid, the extruder body includes barrel and screw rod, run through along the equipment axial in the barrel and seted up the hole, the hole internal rotation has two screw rods, and two screw rod intermeshing rotate, and the lid includes the apron, and the gas vent has been seted up at the top of apron at hole top including the apron setting, gas vent and hole intercommunication, the lid still includes slider and adjusting screw, and adjusting screw sets up at the slider top to correspond the slide opening sliding connection who sets up with the apron top, be used for driving the slider and remove and change the clearance between apron and the screw rod.

As a further improvement of the technical scheme, the number of the adjusting screws is five, and the five adjusting screws are arranged along the axial direction, wherein three adjusting screws apply tension to the sliding block, and two adjusting screws apply pressure to the sliding block, so that the function of fixing the position of the sliding block is achieved.

As a further improvement of the technical scheme, the five adjusting screws are in threaded connection with the sliding holes.

As a further improvement of the technical scheme, the five adjusting screws are in sliding connection with the sliding holes, and the sliding holes are tightly attached to the adjusting screws.

As a further improvement of the technical solution, the bottom of the slider is provided with a reinforced surface, the reinforced surface comprises a reinforced part, the reinforced part is inclined towards one side of the exhaust port, the height of the reinforced part is higher than that of the reinforced part at the other side of the exhaust port, and the reinforced part is inclined towards the direction close to the screw meshing part at one side of the extrusion of the modified plastic.

As a further improvement of the technical scheme, the strengthening surface further comprises a reserved part which is an inwards concave arc-shaped surface and used for attaching the screw rod.

As a further improvement of the technical scheme, the bottom of the strengthening part is provided with a pressing plate, and an elastic connecting assembly is arranged between the pressing plate and the strengthening part.

As a further improvement of the technical scheme, the elastic connection assembly comprises four sliding columns, four corners of the pressing plate are respectively arranged, the four sliding columns are connected with the strengthening portion in a sliding mode, springs are further arranged at the joints, and the springs are arranged longitudinally.

As a further improvement of this technical scheme, the bottom and the intensive portion of clamp plate are passed through the hinge and are rotated and be connected, and elastic connection subassembly includes the keysets, the keysets sets up the one side of squeezing into at clamp plate modified plastics, the keysets has been seted up on the corresponding keysets pivoted route of slider, keysets and keysets swing joint, set up on the inside in keysets and use the hinge to be circular shape convex guide way, sliding connection has the spliced pole in the guide way, spliced pole and keysets fixed connection, the keysets passes through the spliced pole and sets up the spring fixed connection in the guide way.

As a further improvement of the technical scheme, the spring is arranged along the guide groove.

Compared with the prior art, the invention has the beneficial effects that:

in this double screw extruder is with adjustable exhaust cover plate, slide opening sliding connection who sets up is corresponded with the apron top through the slider and the adjusting screw that set up to drive the slider and remove and change the clearance between apron and the screw rod, thereby strengthen the modified plastics flow in the cavity that the clearance formed, reduce the detention of material in the region, avoid the production of burnt material, and then solve the problem of the burnt material of production to product quality influence.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a sectional view showing the whole structure of embodiment 1 of the present invention;

FIG. 3 is an exploded view of a cover plate and a cylinder structure according to embodiment 1 of the present invention;

FIG. 4 is an exploded view of a cover plate and a slider structure according to embodiment 1 of the present invention;

FIG. 5 is a schematic side view of a cover plate and a slider according to embodiment 1 of the present invention;

FIG. 6 is a schematic view of a slider structure according to embodiment 2 of the present invention;

FIG. 7 is a schematic side view of a barrel and a slider according to embodiment 2 of the present invention;

fig. 8 is a first schematic structural view of an elastic connecting assembly according to embodiment 3 of the present invention;

fig. 9 is a second schematic structural diagram of an elastic connection assembly in embodiment 4 of the present invention.

The various reference numbers in the figures mean:

100. an extruder body;

110. a barrel; 111. an inner bore; 112. covering the hole;

120. a screw;

200. a cover body;

210. a cover plate; 211. an exhaust port; 212. a slide hole;

220. a slider; 221. a reinforcing section; 222. a flow guide part; 223. a reserved portion; 224. pressing a plate; 225. an elastic connection assembly; 2251. a traveler; 2252. a spring; 2253. an adapter plate; 226. a transfer groove; 2261. a guide groove;

230. and adjusting the screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Referring to fig. 1 to 9, an object of the present embodiment is to provide an adjustable exhaust cover plate for a twin-screw extruder, including an extruder body 100 and a cover body 200, where the extruder body 100 includes a cylinder 110 and screws 120, an inner hole 111 is formed in the cylinder 110 along an axial direction of the extruder, two screws 120 are rotated in the inner hole 111, the two screws 120 are engaged with each other and driven by an electric driving device, such as a motor or a transmission mechanism in which the motor is engaged with a belt, the cover body 200 includes a cover plate 210, the cover plate 210 is disposed on a top of the inner hole 111, an exhaust port 211 is formed on a top of the cover plate 210, the exhaust port 211 is communicated with the inner hole 111, in addition, the cover body 200 further includes a slider 220 and an adjusting screw 230, the adjusting screw 230 is disposed on a top of the slider 220 and slidably connected with a slide hole 212 formed on a top of the cover plate 210, for driving the slider 220 to move and changing a gap between the cover plate 210 and the screws 120, thereby strengthen the interior modified plastics of cavity that the clearance formed and flow, reduce the delay of material in the region, avoid the production of burnt material, and then solve the problem that the burnt material that produces influences product quality.

Example 1

Referring to fig. 1-5, five adjusting screws 230 are provided, and five adjusting screws 230 are arranged along an axial direction, wherein three adjusting screws 230 apply tension to the slider, and two adjusting screws 230 apply pressure to the slider, so as to fix the position of the slider 220, it is worth to be noted that the adjusting screws can be replaced by other driving devices, such as a compressed air-driven cylinder or a motor-driven cam mechanism, so as to achieve automatic control of the position of the slider, and further, the slider can reciprocate at a certain frequency in practical application, so as to achieve corresponding process requirements, in this embodiment, five adjusting screws 230 are in threaded connection with the sliding hole 212, when in use, the adjusting screws 230 movably connected with the slider 220 are first adjusted, then the remaining adjusting screws 230 are screwed to drive the slider 220 to move, so that the slider is in contact with the slider 220 that is adjusted first, thereby realizing the two-way atress to slider 220, improving the fixed stability of adjusting back slider 220.

It should be noted that the adjusting screw 230 may also be slidably connected to the sliding hole 212, and the sliding hole 212 is tightly attached to the adjusting screw 230 to position the sliding block 220 by friction.

In addition, as shown in fig. 3, in order to facilitate the detachment of the cover plate 210, a cover hole 112 is further formed at the top of the cylinder 110, the air outlet 211 of the cover plate 210 is communicated with the cover hole 112, and the cover plate 210 and the cylinder 110 are fixedly connected by bolts.

Example 2

Referring to fig. 6, in the present embodiment, a reinforcing surface is disposed at the bottom of the slider 220, the reinforcing surface includes a reinforcing portion 221, the reinforcing portion 221 is inclined toward one side of the exhaust port 211, and the height of the one side of the exhaust port 211 is higher than that of the other side of the exhaust port 211, in addition, the reinforcing portion 221 is inclined toward a direction close to the engaging portion of the screw 120 at the side where the modified plastic is extruded, so that the modified plastic is guided by the cooperation of the reinforcing portion 221 and the flow guiding portion 222, as shown in fig. 7, a solid arrow is the extrusion direction of the modified plastic, and a dotted arrow is the flow guiding direction of the reinforcing portion 221 and the flow guiding portion 222, so that the modified plastic smoothly enters the engaging portion of the two screws 120, and the flow efficiency of the reinforced modified plastic is improved.

In addition, strengthen the face and still include reservation portion 223, reservation portion 223 is the arcwall face of indent to laminating screw rod 120 reduces leakage quantity, guarantees the stability of water conservancy diversion.

Example 3

Referring to fig. 8, the difference between this embodiment and embodiment 1 is that a pressing plate 224 is disposed at the bottom of a reinforcing part 221, an elastic connection assembly 225 is disposed between the pressing plate 224 and the reinforcing part 221, the elastic connection assembly 225 includes four sliding columns 2251, which are disposed at four corners of the pressing plate 224 and slidably connected to the reinforcing part 221, a spring 2252 is further disposed at a connection, the spring 2252 is disposed longitudinally, a top end of the spring 2252 is fixedly connected to an inner wall of the reinforcing part 221, and a bottom end of the spring 2251 is connected to a top wall of the sliding column 2251, so that a pressure of the pressing plate 224 is increased by an elastic force of the spring 2252, and the pressing plate 224 further has a movable space for movement to adapt to a flow of a modified plastic with different viscosity, thereby solving a problem that the modified plastic flows out of the exhaust port 211 due to insufficient pressure of the slider 220.

Example 4

Referring to fig. 9, this embodiment is different from embodiment 1 in that the bottom end of the pressing plate 224 is rotatably connected to the reinforcing part 221 through a hinge shaft, and the elastic connection assembly 225 includes an adapter plate 2253, the adapter plate 2253 is disposed on the side of the pressing plate 224 where the modified plastic is extruded, the slider 220 is provided with an adapter groove 226 on the path corresponding to the rotation of the adapter plate 2253, the adapter plate 2253 is movably connected to the adapter groove 226, a guide groove 2261 with a circular arc shape is formed inside the adapter groove 226, the hinge shaft is circular, a connection column is slidably connected in the guide groove 2261 and is fixedly connected to the adapter plate 2253, the adapter plate 2253 is fixedly connected to a spring 2252 disposed in the guide groove 2251 (the spring 2252 is disposed along the guide groove 2261), so that the spring 2252 exerts an elastic force on the adapter plate 2253 to increase the pressure of the pressing plate 224, and the inclination angle of the pressing plate 224 can be changed according to the modified plastic with different viscosities, furthermore, adapter plate 2253 blocks the plastic on the entry side from flowing into the gap between pressure plate 224 and reinforcing part 221.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.