An extruder barrel

Abstract

The utility model relates to the extruder barrel of extruding molding equipment technical field in rubber and plastic industry, specifically for a kind of, including end plate subassembly, frame subassembly, side plate subassembly and two base subassembly, end plate subassembly includes upper end plate, lower end plate, connecting plate, upper end plate is equipped with upper double round hole, lower end plate is equipped with lower double round hole, upper end plate is fixed with baffle subassembly, baffle subassembly includes double arc baffle;Frame subassembly includes two connecting vertical plate and double arc connecting plate;Side plate subassembly includes outer side plate, mid vertical plate, welded in the first connecting plate of outer side plate inner wall, welded in the second connecting plate of outer side plate inner wall, welded in the first inner side plate of first connecting plate and welded in the second inner side plate of second connecting plate;Two base subassembly are respectively arranged in the two sides of outer side plate.The utility model uses the form of multiple steel structure subassembly and carries out assembly welding, reduces the possibility that cooling water cavity occurs leakage, improves the dimensional accuracy of final extruding finished product.

Description

Technical Field

[0001] This utility model relates to the technical field of extrusion molding equipment in the rubber and plastics industry, specifically to an extruder barrel. Background Technology

[0002] Extrusion molding, also known as plastic extrusion, is a process in plastics manufacturing where hydraulic pressure is applied to a die to extrude materials. It involves the material being heated and plasticized by the action of the extruder barrel and screw, and then continuously pushed forward through the die head to produce products or semi-finished products of various cross-sections.

[0003] In the extrusion industry, casting is the most common type of barrel. Due to the manufacturing process and characteristics of castings, the mold cavity surface often has holes and pits. When molten metal is injected, the gas in these holes and pits rapidly expands and compresses the molten metal, creating cavities. Internal defects in castings are difficult to detect. Therefore, casting barrels frequently experience cooling water leakage during equipment use, ultimately leading to batch quality accidents during extrusion, resulting in significant material losses, production line shutdowns, and disruptions to the entire workflow. Furthermore, existing technologies use machined castings to complete extrusion, with surface coatings to improve the surface finish; however, these coatings are prone to peeling. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides an extruder barrel that no longer uses a casting structure, but instead adopts a welding of multiple steel structural components to form an extruder barrel, thereby forming an inner lining surface that cooperates with the rotor. This avoids the choking holes that may occur when using a casting structure, reduces the possibility of leakage in the cooling water cavity, and improves the dimensional accuracy of the final extruded product.

[0005] To achieve the above objectives, the present invention provides an extruder barrel, comprising an end plate assembly, a frame assembly, a side plate assembly, and two base assemblies. The end plate assembly includes an upper end plate, a lower end plate, and a connecting plate disposed between the upper and lower end plates. The upper end plate has upper double circular holes, and the lower end plate has lower double circular holes. A baffle assembly is fixed to the upper end plate, and the baffle assembly includes a double arc-shaped baffle disposed on one side of the upper and lower double circular holes. The frame assembly includes two connecting uprights and a double arc-shaped connecting plate disposed between the two connecting uprights. The connecting plate has one end fixed to the upper end plate and the other end fixed to the double-arc connecting plate. The side plate assembly includes an outer plate disposed between the upper end plate and the double-arc connecting plate, a middle plate welded to the inner wall of the outer plate, a first connecting plate located on one side of the middle plate and welded to the inner wall of the outer plate, a second connecting plate located on the other side of the middle plate and welded to the inner wall of the outer plate, a first inner plate welded to the first connecting plate, and a second inner plate welded to the second connecting plate. Two base assemblies are respectively disposed on both sides of the outer plate.

[0006] Furthermore, the base assembly includes a base plate and a connecting rib plate fixed between the outer side plate and the base plate.

[0007] Furthermore, the first inner side plate includes a first side plate and a first liner; the second inner side plate includes a second side plate and a second liner.

[0008] Furthermore, the bottom ends of both the first and second liner plates extend from the double-arc connecting plate to the inner edge of the lower double circular hole of the lower end plate.

[0009] Furthermore, the outer side plate includes a middle outer side plate, a third side plate and a fourth side plate disposed on one side of the middle outer side plate, and a fifth side plate and a sixth side plate disposed on the other side of the middle outer side plate.

[0010] Furthermore, the upper double circular holes and the lower double circular holes are coaxially arranged.

[0011] Furthermore, the size of the upper double circular holes is larger than the size of the lower double circular holes.

[0012] The beneficial effects of this utility model are: it no longer uses a casting structure, but adopts a welding of multiple steel structure components to form the extruder barrel, thereby forming an inner lining surface that matches the rotor, avoiding the choking holes that may occur when using a casting structure, reducing the possibility of leakage in the cooling water cavity, and improving the dimensional accuracy of the final extruded product. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of an extruder barrel in one embodiment of the present invention;

[0014] Figure 2 This is a front view of an extruder barrel according to one embodiment of the present invention;

[0015] Figure 3 This is a side view of an extruder barrel according to one embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of an extruder barrel from another perspective in one embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of the end plate assembly in one embodiment of the present invention;

[0018] Figure 6 This is a top view of the end plate assembly in one embodiment of the present invention;

[0019] Figure 7 This is a structural schematic diagram of an extruder barrel hidden side plate assembly in one embodiment of the present invention;

[0020] Figure 8 This is a structural schematic diagram of an extruder barrel hidden side plate assembly from another perspective in one embodiment of the present invention;

[0021] In the picture:

[0022] 100. End plate assembly; 110. Upper end plate; 111. Upper double round hole; 120. Lower end plate; 121. Lower double round hole; 130. Connecting plate; 140. Baffle assembly; 141. Double arc baffle.

[0023] 200. Frame component; 210. Connecting upright; 220. Double-arc connecting plate.

[0024] 300. Side panel assembly; 310. Outer side panel; 311. Middle outer side panel; 312. Third side panel; 313. Fourth side panel; 314. Fifth side panel; 315. Sixth side panel; 320. Central upright panel; 330. First connecting plate; 340. Second connecting plate; 350. First inner side panel; 351. First side panel; 352. First liner; 360. Second inner side panel; 361. Second side panel; 362. Second liner.

[0025] 400. Base assembly; 410. Base plate; 420. Connecting stiffener. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] See Figure 1 , Figure 2 and Figure 3 The diagram shows a structural schematic of an extruder barrel according to an embodiment of the present invention, which includes an end plate assembly 100, a frame assembly 200, a side plate assembly 300, and two base assemblies 400. The end plate assembly 100 includes an upper end plate 110, a lower end plate 120, and a connecting plate 130 disposed between the upper end plate 110 and the lower end plate 120. The upper end plate 110 has an upper double circular hole 111, and the lower end plate 120 has a lower double circular hole 121. A baffle assembly 140 is fixed to the upper end plate 110. The baffle assembly 140 includes a double arc baffle 141 disposed on one side of the upper double circular hole 111 and the lower double circular hole 121. The frame assembly 200 includes two connecting upright plates 210 and a base assembly disposed on the two connecting upright plates 210. The double-arc connecting plate 220 is between the upper end plate 110 and the double-arc connecting plate 220. One end of the connecting plate 210 is fixed to the upper end plate 110, and the other end of the connecting plate 210 is fixed with the double-arc connecting plate 220. The side plate assembly 300 includes an outer plate 310 disposed between the upper end plate 110 and the double-arc connecting plate 220, a middle plate 320 fixed to the inner wall of the outer plate 310, a first connecting plate 330 located on one side of the middle plate 320 and fixed to the inner wall of the outer plate 310, a second connecting plate 340 located on the other side of the middle plate and fixed to the inner wall of the outer plate 310, a first inner plate 350 fixed to the first connecting plate 330, and a second inner plate 360 ​​fixed to the second connecting plate 340. Two base assemblies 400 are respectively disposed on both sides of the outer plate 310.

[0028] The extruder barrel described above no longer uses a casting structure. Instead, it is constructed by welding together end plate assembly 100, frame assembly 200, side plate assembly 300, and two base assemblies 400. The first inner side plate 350 and the second inner side plate 360 ​​form an inner lining surface that mates with the rotor, avoiding the choking that might occur with a casting structure, reducing the possibility of leakage in the cooling water chamber, and improving the dimensional accuracy of the final extruded product. Furthermore, the design of the welding structure and the component division in this embodiment have a beneficial effect on welding deformation. Increasing the restraint appropriately increases the welding residual stress, thereby reducing welding deformation.

[0029] This embodiment employs a welded steel structure design using forgings and steel plates. During extruder barrel operation, as pressure increases, the moving solid plastic continuously contacts and rubs against the heated barrel wall. The temperature of the plastic near the barrel wall continuously rises, reaching its melting point and forming a thin molten film on the inner wall of the barrel. The heat from this melting process originates from two sources: conductive heat from the external heater of the barrel and shear (internal friction) heat generated within the molten film due to the different movement speeds of the various melt layers—i.e., viscous heat loss as referred to in rheology. This embodiment replaces the original cast body with forgings and redesigns the structure to improve the equipment's service life in high-temperature environments. The extruded surface uses 316L, which has high corrosion and wear resistance, and employs a variable cross-section roll forming method to ensure the fitting accuracy between the inner liner surface and the rotor, ensuring the working curved surface and the roller gap are accurate to <1.5m. Specifically, as... Figure 1 As shown, the first inner side plate 350 and the second inner side plate 360 ​​provide the forming surfaces that come into contact with the material. The material is 316L stainless steel, which has high wear resistance and strong corrosion resistance. The main structure adopts a forged steel structure, and the internal cooling water cavity formed between the outer side plate 310 and the two inner side plates is made of welded steel plates. After welding, the circulating water cavity needs to undergo a water pressure test at 0.7 MPa for 30 minutes, and no leakage is allowed. The welding deformation is controlled within 0.5%, ensuring that the clearance between the first inner side plate 350 and the second inner side plate 360 ​​and the rotating rotor is less than 1.5 mm.

[0030] See Figure 3 In one embodiment, the base assembly 400 includes a base plate 410 and a connecting rib plate 420 fixed between the outer side plate 310 and the base plate 410.

[0031] See Figure 7 and Figure 8 In one embodiment, the first inner side plate 350 includes a first side plate 351 and a first liner 352; the second inner side plate 360 ​​includes a second side plate 361 and a second liner 362. The first inner side plate 350 and the second inner side plate 360 ​​serve as extrusion cylinder liners, and the material is 316L stainless steel, which is wear-resistant and corrosion-resistant. 316L stainless steel exhibits good oxidation resistance in intermittent use below 1600 degrees Celsius and continuous use below 1700 degrees Celsius. In continuous use within this temperature range, the stainless steel exhibits good heat resistance, and 316L stainless steel has good resistance to carbide precipitation and good weldability, eliminating the need for post-weld annealing.

[0032] like Figure 1 As shown, in one embodiment, the bottom ends of the first liner 352 and the second liner 362 are both extended by the double arc connecting plate 220 to the inner edge of the lower double circular hole 121 of the lower end plate 120.

[0033] like Figure 7 and Figure 8 As shown, in one embodiment, the outer side plate 310 includes a middle outer side plate 311, a third side plate 312 and a fourth side plate 313 disposed on one side of the middle outer side plate 311, and a fifth side plate 314 and a sixth side plate 315 disposed on the other side of the middle outer side plate 311.

[0034] See Figure 5 and Figure 6 In one embodiment, the upper double circular hole 111 and the lower double circular hole 121 are coaxially arranged.

[0035] In one embodiment, the size of the upper double circular hole 111 is larger than the size of the lower double circular hole 121.

[0036] The welding process flow of the extruder barrel in this embodiment is as follows:

[0037] Step S100: Weld the end plate assembly 100 and weld the connecting plate 130 between the upper end plate 110 and the lower end plate 120. Four connecting plates 130 are provided and are respectively located at the four corners of the upper end plate 110 and the lower end plate 120.

[0038] Step S200: Weld the frame assembly 200 onto the end plate assembly 100. Specifically, weld the two connecting upright plates 210 onto both ends of the double arc connecting plate 220, and weld the other ends of the two connecting upright plates 210 onto the upper end plate 110.

[0039] Step S300: Weld the base plate 410 to multiple connecting stiffeners 420 to form the base assembly 400;

[0040] Step S400: Weld the side plate assembly 300 and the frame assembly 200 together. In this step, the first liner plate 352 and the second liner plate 362 are welded last.

[0041] Step S500: Weld the two base assemblies 400 from step S300 to both sides of the outer side plate 310;

[0042] Step S600: Assemble the screw plug and perform a water pressure test.

[0043] The above welding process, based on the welding deformation coefficients of different materials, determines the welding scheme through statistical analysis. Practical verification shows that the welding deformation can be controlled within 0.5%, and the clearance accuracy between the liner and the rotating rotor can reach less than 1mm. Furthermore, quality control is achieved by adjusting the welding sequence of each part, the weld leg height, the preset deformation value, and the cross-sectional dimension inspection during the process, ensuring the dimensional accuracy of the final product.

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. An extruder barrel, characterized in that: include An end plate assembly includes an upper end plate, a lower end plate, and a connecting plate disposed between the upper end plate and the lower end plate. The upper end plate has upper double circular holes, and the lower end plate has lower double circular holes. A baffle assembly is fixed to the upper end plate. The baffle assembly includes a double arc baffle disposed on one side of the upper double circular holes and the lower double circular holes. The frame assembly includes two connecting uprights and a double-arc connecting plate disposed between the two connecting uprights. One end of the connecting upright is fixed to the upper end plate, and the other end of the connecting upright is fixed to the double-arc connecting plate. The side panel assembly includes an outer side panel disposed between the upper end plate and the double arc connecting plate, a central upright plate welded to the inner wall of the outer side panel, a first connecting plate located on one side of the central upright plate and welded to the inner wall of the outer side panel, a second connecting plate located on the other side of the central upright plate and welded to the inner wall of the outer side panel, a first inner side panel welded to the first connecting plate, and a second inner side panel welded to the second connecting plate. Two base assemblies are respectively disposed on both sides of the outer side plate.

2. The extruder barrel according to claim 1, characterized in that: The base assembly includes a base plate and a connecting rib plate fixed between the outer side plate and the base plate.

3. The extruder barrel according to claim 1, characterized in that: The first inner side plate includes a first side plate and a first liner; the second inner side plate includes a second side plate and a second liner.

4. An extruder barrel according to claim 3, characterized in that: The bottom ends of both the first and second liner plates extend from the double-arc connecting plate to the inner edge of the lower double circular hole of the lower end plate.

5. An extruder barrel according to claim 1, characterized in that: The outer side plate includes a middle outer side plate, a third side plate and a fourth side plate disposed on one side of the middle outer side plate, and a fifth side plate and a sixth side plate disposed on the other side of the middle outer side plate.

6. An extruder barrel according to claim 1, characterized in that: The upper double circular holes and the lower double circular holes are coaxially arranged.

7. An extruder barrel according to claim 1, characterized in that: The size of the upper double circular holes is larger than the size of the lower double circular holes.

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