Exhaust cylinder for sheet production

Abstract

The exhaust machine barrel comprises a feeding section and an extrusion exhaust section connected to the rear end of the feeding section, the feeding section comprises an inner sleeve, a water sleeve and an outer sleeve which are coaxially arranged in a sleeving mode from inside to outside, and a first inner hole extending from front to back is formed in the inner sleeve; a plurality of threaded grooves spirally extending from front to back are formed in the inner wall face of the inner sleeve, and the feeding section is provided with a feeding port communicated with the first inner hole; a cooling flow channel surrounding the circumference of the first inner hole from front to back is formed between the water jacket and the outer sleeve; a second inner hole extending from front to back is formed in the extrusion exhaust section, the extrusion exhaust section comprises a first barrel, an exhaust barrel assembly and a second barrel which are sequentially connected from front to back, the exhaust barrel assembly comprises an exhaust barrel, and an exhaust port communicated with the second inner hole is formed in the side wall of the exhaust barrel. The applicability of the machine barrel to different materials is enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of plastic product production equipment, and in particular to an exhaust barrel for sheet production. Background Art

[0002] The current barrel used for PP, PS, and ABS sheet extrusion adopts an integral structure, which is difficult to process and is not conducive to production and manufacturing. It also requires another process to dry the crystals before extrusion molding, which is time-consuming and power-consuming, has high production costs, and complex processes. It cannot meet the feeding needs of a variety of materials, and the barrel has poor adaptability. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the purpose of the present application is to provide an exhaust barrel for sheet production.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an exhaust barrel for sheet production, comprising a feeding section and an extrusion exhaust section, wherein the extrusion exhaust section is coaxially connected to the rear end of the feeding section, wherein the feeding section comprises an inner sleeve, a water jacket and an outer sleeve coaxially sleeved from the inside to the outside, wherein a first inner hole extending from the front to the back is provided in the inner sleeve, wherein a plurality of thread grooves extending spirally from the front to the back are provided on the inner wall surface of the inner sleeve, wherein the plurality of thread grooves are arranged at intervals along the circumference of the first inner hole, and wherein the feeding section has a feed port connected to the first inner hole; A cooling channel is formed between the water jacket and the outer jacket, surrounding the circumference of the first inner hole from front to back, and the cooling channel is arranged to avoid the feed port; a second inner hole extending from front to back is opened in the extrusion exhaust section, and the second inner hole is connected to the rear end of the first inner hole to form a conveying channel for the rotation of the screw; the extrusion exhaust section includes a first cylinder, an exhaust cylinder assembly and a second cylinder connected in sequence from front to back, and the exhaust cylinder assembly includes an exhaust cylinder, and an exhaust port connected to the second inner hole is opened on the side wall of the exhaust cylinder.

[0005] In the above technical solution, it is further preferred that the outer surface of the water jacket is provided with a plurality of straight grooves extending in the front-to-back direction, at least one front annular groove and a plurality of rear annular grooves, the plurality of straight grooves are spaced apart along the circumference of the water jacket, the at least one front annular groove is arranged at the front side of the plurality of straight grooves, and the rearmost front annular groove is connected to the plurality of straight grooves, the plurality of rear annular grooves are arranged at the rear side of the plurality of straight grooves, and are spaced apart from front to back, and the frontmost rear annular groove is connected to the plurality of straight grooves.

[0006] In the above technical solution, further preferably, the cooling channel includes a water inlet and a water outlet located above the water inlet. The water inlet is communicated with the front ring groove at the foremost side, and the water outlet is communicated with the rear ring groove at the rearmost side.

[0007] In the above technical solution, further preferably, a plurality of baffles are arranged in the front ring groove and the rear ring groove communicated with a plurality of the straight-through grooves. A notch communicating the two rear ring grooves is formed between two adjacent rear ring grooves, and two adjacent notches in the front-rear direction are oppositely arranged in the circumferential direction of the water jacket; the plurality of baffles and the plurality of notches enable at least one of the front ring grooves, the plurality of straight-through grooves and the plurality of rear ring grooves to form two one-way cooling paths between the water inlet and the water outlet.

[0008] In the above technical solution, further preferably, the two cooling paths are symmetrically arranged in the circumferential direction of the water jacket.

[0009] In the above technical solution, further preferably, the inner sleeve is key-connected to the water jacket, and the outer sleeve is in thermal interference fit with the water jacket.

[0010] In the above technical solution, further preferably, the exhaust barrel assembly corresponds to the exhaust section of the extrusion screw.

[0011] The present application has the following beneficial effects compared with the prior art:

[0012] The present application adopts a split inner and outer sleeve structure, which is convenient for replacing or modifying the size of the inner sleeve according to the feeding requirements, and enhances the applicability of the barrel to different materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of an exhaust barrel provided by an embodiment of the present application;

[0014] Figure 2 is Figure 1 a schematic structural diagram of the feeding section in

[0015] Figure 3 is Figure 2 a schematic structural diagram of the inner sleeve in

[0016] Figure 4 is Figure 2 a schematic structural diagram of the assembly of the water ring sleeve and the outer sleeve in

[0017] Figure 5 is a cross-sectional view taken along the A-A line in Figure 4 ;

[0018] Figure 6For Figure 4 Developed schematic diagram of the cooling flow channel between the middle water ring sleeve and the outer sleeve;

[0019] Figure 7 For Figure 1 Schematic structural diagram of the exhaust barrel assembly in;

[0020] Figure 8 Along Figure 7 Cross-sectional view taken along the B-B line in;

[0021] Figure 9 For Figure 7 Schematic structural diagram of the muffler cover for the exhaust barrel body assembly in.

[0022] Wherein: 100, exhaust barrel; 10, feeding section; 1, inner sleeve; 11, first inner hole; 12, thread groove; 2, water jacket; 21, straight-through groove; 22, front ring groove; 23, rear ring groove; 24, baffle; 25, notch; 3, outer sleeve; 31, water inlet; 32, water outlet; 4, feed inlet; 20, extrusion exhaust section; 5, second inner hole; 6, first barrel body; 7, exhaust barrel assembly; 71, exhaust barrel body; 710, exhaust port; 72, exhaust cover; 720, air outlet; 73, muffler cover; 8, second barrel body. Detailed implementation manners

[0023] To describe in detail the technical content, structural features, achieved objectives and effects of the application, the technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shapes, structures and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment.

[0024] The present application provides an exhaust barrel for sheet production, which is used in cooperation with an exhaust screw and can discharge the air and water vapor carried by the feeding from the exhaust barrel, improving the quality of the extruded product. As Figure 1 shown, the exhaust barrel 100 includes a feeding section 10 and an extrusion exhaust section 20. Both the feeding section 10 and the extrusion exhaust section 20 extend in the front-rear direction, and the extrusion exhaust section 20 is coaxially connected to the rear end of the feeding section 10.

[0025] As Figure 2 , 3As shown in the figure, the feeding section 10 includes an inner sleeve 1, a water jacket 2, and an outer sleeve 3 that are coaxially sleeved from the inside out. A first inner hole 11 extending from the front to the back is provided in the inner sleeve 1. A plurality of thread grooves 12 spirally extending from the front to the back are provided on the inner wall surface of the inner sleeve 1. The plurality of thread grooves 12 are arranged at intervals in the circumferential direction of the first inner hole 11. The plurality of thread grooves 12 cooperate with the exhaust screw to increase the feeding amount, thereby increasing the output. The feeding section 10 also has a feeding port 4 for raw materials to enter the first inner hole 11. A notch is provided on the side wall of the inner sleeve 1, and a notch corresponding to the notch on the inner sleeve 1 is provided on the side wall of the water jacket 2. The notch on the inner sleeve 1 and the notch on the water jacket 2 are butted against each other to form the feeding port 4. The diameter D1 of the first inner hole 11 corresponding to the feeding port 4 is greater than the diameter D2 of the other parts of the first inner hole 11, thereby increasing the material intake of the feeding section 10 and improving the extrusion output.

[0026] The water jacket 2 is sleeved on the inner sleeve 1 and is key-connected to the inner sleeve 1. Key grooves are respectively provided on the outer wall surface of the inner sleeve 1 and the inner wall surface of the water jacket 2. A pair of key grooves correspond to each other and can accommodate a flat key at the same time. The key connection effectively prevents the water jacket 2 and the inner sleeve 1 from rotating around their own axis relative to each other. The key connection between the inner sleeve 1 and the water jacket 2 facilitates the disassembly and assembly of the inner sleeve 1. The inner sleeve can be replaced according to the feeding requirements. When the inner sleeve is worn, only the inner sleeve needs to be replaced, and there is no need to replace the water ring sleeve and the outer sleeve, improving the applicability of the exhaust barrel 100 and reducing the subsequent maintenance cost.

[0027] As Figures 4 - 6 shown in the figure, a cooling flow channel surrounding the circumferential direction of the first inner hole 11 from the front to the back is formed between the water jacket 2 and the outer sleeve 3. Cooling water flows in the cooling flow channel to cool down the feeding section 10, preventing the raw materials from overheating and burning in the feeding section 10. The cooling flow channel is arranged to avoid the feeding port 4.

[0028] A plurality of straight-through grooves 21 extending in the front-back direction, a front ring groove 22, and a plurality of rear ring grooves 23 are provided on the outer surface of the water jacket 2. The plurality of straight-through grooves 21 are distributed at intervals in the circumferential direction of the water jacket. The front ring groove 22 is arranged on the front side of the plurality of straight-through grooves 21 and is connected to the plurality of straight-through grooves 21. The plurality of rear ring grooves 23 are arranged on the rear side of the plurality of straight-through grooves 21 and are distributed at intervals from the front to the back. The foremost rear ring groove 23 is connected to the plurality of straight-through grooves 21. A plurality of baffles 24 are provided in the front ring groove 22 and the rear ring grooves 23 connected to the plurality of straight-through grooves 21. Notches 25 connecting two rear ring grooves 23 are provided between adjacent two rear ring grooves 23. The two adjacent notches 25 in the front-back direction are oppositely arranged in the circumferential direction of the water jacket 2.

[0029] The jacket 3 is thermally interference-fitted on the water jacket 2, and the inner wall surface of the jacket 3 and the front annular groove 22, several straight grooves 21 and several rear annular grooves 23 form a cooling flow path. The cooling flow path includes a water inlet 31 and a water outlet 32 located above the water inlet 31. Both the water inlet 31 and the water outlet 32 are provided on the jacket 3. The water inlet 31 is communicated with the foremost front annular groove 22, and the water outlet 32 is communicated with the rearmost rear annular groove 23. Several baffles 24 and several notches 25 enable the front annular groove 22, several straight grooves 21 and several rear annular grooves 23 to form two one-way cooling paths between the water inlet and the water outlet, and the two one-way cooling paths are symmetrically arranged in the circumferential direction of the water jacket 2, which can improve the cooling effect and cooling efficiency of the exhaust barrel 100.

[0030] As Figure 1 shown, a second inner hole 5 extending from front to rear is provided in the extrusion exhaust section 20. The second inner hole 5 is butted against the rear end of the first inner hole 11 to form a conveying channel for the exhaust screw to rotate. The extrusion exhaust section 20 includes a first cylinder body 6, an exhaust cylinder assembly 7 and a second cylinder body 8 connected in sequence from front to rear.

[0031] As Figures 7 - 9 shown, the exhaust cylinder assembly 7 includes an exhaust cylinder body 71, an exhaust cover 72 and a blank cover 73 which are replaceably connected to the exhaust cylinder body 71. An exhaust port 710 communicated with the second inner hole 5 is provided on the side wall of the exhaust cylinder body 71. The exhaust cover 72 has an air outlet 720. The exhaust cover 72 is arranged at the exhaust port 710 to open the exhaust port 710, and the air outlet 720 is eccentrically arranged to prevent the material from overflowing at the exhaust port 710. The exhaust cylinder assembly 7 corresponds to the exhaust section of the exhaust screw. A large amount of gas and water vapor are released by the material at the exhaust section of the exhaust screw. The gas and water vapor are output from the air outlet 720 of the exhaust cylinder assembly 7 out of the exhaust barrel 100. When producing materials that do not require exhaust, the blank cover 73 closes the exhaust port 710 to prevent leakage of materials.

[0032] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements. The scope of protection required by the present application is defined by the appended claims, the specification and their equivalents.

Claims

1. An exhaust barrel for sheet production, comprising a feeding section and an extrusion exhaust section, the extrusion exhaust section being coaxially connected to the rear end of the feeding section, characterized in that, The feeding section includes an inner sleeve, a water jacket, and an outer jacket coaxially sleeved from the inside outwards. A first inner hole extending from the front to the back is formed in the inner sleeve. A plurality of thread grooves spirally extending from the front to the back are formed on the inner wall surface of the inner sleeve. The plurality of thread grooves are arranged at intervals in the circumferential direction of the first inner hole. The feeding section has a feed inlet communicating with the first inner hole. A cooling flow channel is formed between the water jacket and the outer jacket, which surrounds the circumferential direction of the first inner hole from the front to the back. The cooling flow channel is arranged to avoid the feed inlet. A second inner hole extending from the front to the back is formed in the extrusion and exhaust section. The second inner hole is docked at the rear end of the first inner hole to form a conveying channel for the screw to rotate. The extrusion and exhaust section includes a first cylinder body, an exhaust cylinder assembly, and a second cylinder body connected in sequence from the front to the back. The exhaust cylinder assembly includes an exhaust cylinder body, and an exhaust port communicating with the second inner hole is formed on the side wall of the exhaust cylinder body.

2. The exhaust barrel according to claim 1, characterized in that, A plurality of straight-through grooves extending in the front-rear direction, at least one front ring groove, and a plurality of rear ring grooves are formed on the outer surface of the water jacket. The plurality of straight-through grooves are distributed at intervals in the circumferential direction of the water jacket. The at least one front ring groove is arranged on the front side of the plurality of straight-through grooves, and the last front ring groove communicates with the plurality of straight-through grooves. The plurality of rear ring grooves are arranged on the rear side of the plurality of straight-through grooves and are spaced apart from each other from the front to the back. The foremost rear ring groove communicates with the plurality of straight-through grooves.

3. The exhaust barrel according to claim 2, wherein The cooling flow channel includes a water inlet and a water outlet located above the water inlet. The water inlet communicates with the foremost front ring groove, and the water outlet communicates with the last rear ring groove.

4. The exhaust barrel according to claim 3, characterized in that, A plurality of baffles are arranged in the front ring groove and the rear ring groove communicating with the plurality of straight-through grooves. A notch communicating with the two rear ring grooves is formed between two adjacent rear ring grooves. The notches adjacent to each other in the front-rear direction are oppositely arranged in the circumferential direction of the water jacket. The plurality of baffles and the plurality of notches form two one-way cooling paths between the at least one front ring groove, the plurality of straight-through grooves, and the plurality of rear ring grooves between the water inlet and the water outlet.

5. The exhaust barrel according to claim 4, wherein The two cooling paths are symmetrically arranged in the circumferential direction of the water jacket.

6. The exhaust barrel according to claim 1, wherein, The inner sleeve is key-connected to the water jacket, and the outer jacket is thermally interference-fitted with the water jacket.

7. The exhaust barrel according to claim 1, characterized in that The exhaust cylinder assembly corresponds to the exhaust section of the screw.

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