Flat extrusion die head capable of adjusting discharge width on line

Abstract

The flat extrusion die head comprises an upper die and a lower die, outer blocking grooves are formed in the outer sides of the front ends of the upper die and the lower die, outer blocking drag hooks are connected into the outer blocking grooves, and the front ends of the two outer blocking drag hooks are connected into a whole through an outer blocking top cover. An installation containing cavity is defined by the outer blocking drag hook, the outer blocking top cover, the front end face of the upper die and the front end face of the lower die, a long blocking strip is arranged in the installation containing cavity, the top face of the long blocking strip is attached to the front end faces of the upper die and the lower die for sealing, a series of positioning holes are formed in the bottom face of the long blocking strip in the length direction, and a series of threaded holes are formed in the outer blocking top cover in the length direction. A limiting screw is connected in the threaded hole, a belleville spring and a gasket are arranged between the limiting screw and the outer blocking top cover in a sleeved mode, the large end of the limiting screw is located in the positioning hole, the depth of the positioning hole is larger than the height of the large end of the limiting screw, and the outer blocking drag hook and the outer blocking top cover are adjusted through a lead screw nut adjusting mechanism to move horizontally in the breadth direction. The discharging breadth of the flat extrusion die head can be adjusted on line.

Description

Technical Field

[0001] This invention relates to the field of extrusion die technology, and in particular to a flat extrusion die with adjustable discharge width online. Background Technology

[0002] The outer baffle is an external adjustment device installed on both sides of the exit of a flat extrusion die. It is used to seal off excess parts of the die lip, enabling rapid adjustment of the width of the extruded product. However, the existing outer baffle structure on the die head has the limitation of not being able to be continuously adjusted online. The current operation procedure for the outer baffle is usually: stop the machine → loosen the locking screw → adjust the sealing width → tighten the screw → start the machine. This drawback is obvious: the machine must be stopped during the adjustment process, which seriously affects work efficiency. Summary of the Invention

[0003] To address the aforementioned problems, this invention aims to provide a flat extrusion die head with online adjustable discharge width. It allows for online adjustment of the extruded product width without stopping the machine. The seal is achieved solely through an elastic device that tightly adheres the baffle to the die lip surface, eliminating the cumbersome steps of loosening and tightening screws for adjustment and significantly improving adjustment efficiency.

[0004] The technical solution of this invention is a flat extrusion die head with online adjustable discharge width, including an upper die and a lower die. An extrusion channel is provided at the front end between the upper die and the lower die. Screw and nut adjustment mechanisms are respectively provided on the left and right sides of the upper die and the lower die. The invention is characterized in that: an outer stop groove is provided on the outer side of the front end of the upper die and the lower die, and an outer stop hook is connected in the outer stop groove. The front ends of two outer stop hooks are connected as one unit by an outer stop top cover. The outer stop hooks, the outer stop top cover, the front end face of the upper die, and the front end face of the lower die form an installation cavity, and a long stop bar is provided in the installation cavity. The top surface of the long baffle is sealed to the front end faces of the upper and lower molds. A series of positioning holes are spaced apart along the length of the bottom surface of the long baffle. A series of threaded holes are spaced apart along the length of the outer baffle top cover. Limiting screws are connected in the threaded holes. A butterfly spring and a washer are sleeved between the limiting screw and the outer baffle top cover. The large end of the limiting screw is located in the positioning hole and the two are compatible. The depth of the positioning hole is greater than the height of the large end of the limiting screw. The outer baffle hook and the outer baffle top cover are adjusted to move horizontally along the width direction by a screw and nut adjustment mechanism.

[0005] Preferably, the lead screw nut adjusting mechanism includes a side plate connected to the sides of the upper and lower dies, a guide rod connected to the side plate, the outer end of the guide rod being fixed by a fixing plate, an adjusting lead screw being installed between the side plate and the fixing plate by a bushing, an adjusting block being threaded onto the adjusting lead screw, the adjusting block extending outward to an end connection portion, and the outer stop hook and the outer stop top cover being connected to the end connection portion by screws.

[0006] Preferably, the bottom surface of the long strip contacts the gasket, and the overall compression of the two ends of the disc spring is 25%-75% under the compression of the gasket and the outer cover.

[0007] Preferably, the threaded holes on the outer cover are evenly spaced along its length, the positioning holes on the long strip are evenly spaced along its length, the screw portion of the limiting screw is threaded into the threaded hole, and the end head is positioned and installed in the positioning hole.

[0008] This invention uses a pre-tightened butterfly spring to press down on a long stop bar, making it fit tightly against the die lip surface for sealing, forming a stable sealing structure. Then, by adjusting the lead screw, the outer stop structure can be moved laterally to achieve online adjustment of the extrusion width of the die head without stopping the machine, which greatly improves the adjustment efficiency. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure at one end; Figure 3 for Figure 2 Exploded view; Figure 4 This is a schematic diagram of the cross-sectional structure in this invention; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Wherein: 1—Upper die; 2—Lower die; 3—Extrusion channel; 4—Screw nut adjustment mechanism; 41—Side plate; 42—Guide rod; 43—Fixed plate; 44—Adjusting screw; 45—Adjusting block; 451—End connection part; 5—Outer stop groove; 6—Outer stop hook; 7—Outer stop top cover; 71—Threaded hole; 8—Mounting cavity; 9—Long stop bar; 91—Positioning hole; 10—Limit screw; 11—Butterfly spring; 12—Washer. Detailed Implementation

[0010] The present invention will now be described in further detail with reference to the accompanying drawings.

[0011] like Figures 1 to 5As shown, this invention provides a flat extrusion die head with adjustable discharge width online, including an upper die 1 and a lower die 2. An extrusion channel 3 is provided at the front end between the upper die 1 and the lower die 2. Screw and nut adjustment mechanisms 4 are respectively provided on the left and right sides of the upper die 1 and the lower die 2. The invention is characterized in that: an outer baffle groove 5 is provided on the outer side of the front end of the upper die 1 and the lower die 2. An outer baffle hook 6 is connected inside the outer baffle groove 5. The front ends of two outer baffle hooks 6 are connected as one unit by an outer baffle top cover 7. The outer baffle hooks 6, the outer baffle top cover 7, the front end face of the upper die 1, and the front end face of the lower die 2 form an installation cavity 8. A long baffle 9 is provided inside the installation cavity 8. The top surface of the baffle 9 is sealed to the front end faces of the upper mold 1 and the lower mold 2. The bottom surface of the long baffle 9 is provided with a series of positioning holes 91 at intervals along the length direction. The outer baffle top cover 7 is provided with a series of threaded holes 71 at intervals along the length direction. The threaded holes 71 are connected to limit screws 10. A butterfly spring 11 and a washer 12 are sleeved between the limit screw 10 and the outer baffle top cover 7. The large end of the limit screw 10 is located in the positioning hole 91 and the two are compatible. The depth of the positioning hole 91 is greater than the height of the large end of the limit screw 10. The outer baffle hook 6 and the outer baffle top cover 7 are adjusted to move horizontally along the width direction by the screw nut adjustment mechanism 4.

[0012] In the above scheme, the lead screw nut adjusting mechanism 4 includes a side plate 41 connected to the sides of the upper mold 1 and the lower mold 2. A guide rod 42 is connected to the side plate 41. The outer end of the guide rod 42 is fixed by a fixing plate 43. An adjusting lead screw 44 is installed between the side plate 41 and the fixing plate 43 through a bushing. An adjusting block 45 is threadedly connected to the adjusting lead screw 44. The adjusting block 45 extends outward to an end connection part 451. The outer stop hook 6 and the outer stop top cover 7 are connected to the end connection part 451 by screws.

[0013] Specifically, the bottom surface of the long strip 9 contacts the pad 12, and the overall compression of the two ends of the butterfly spring 11 under the compression of the pad 12 and the outer top cover 7 is 25%-75%.

[0014] Specifically, the threaded holes 71 on the outer cover 7 are evenly distributed along its length, the positioning holes 91 on the long strip 9 are evenly distributed along its length, the screw part of the limiting screw 10 is threaded into the threaded hole 71, and the end head is positioned and installed in the positioning hole 91.

[0015] In this invention, since the outer stop hook 6 and the outer stop top cover 7 are connected as one unit, the outer stop hook 6 can slide along the outer stop groove 5 under the drive of the screw nut adjusting mechanism 4. Within the internally enclosed mounting cavity 8, the long stop bar 9, the limiting screw 10, the butterfly spring 11, and the washer 12 are installed accordingly. The specific installation steps are as follows: first, the butterfly spring 11 and the washer 12 are stacked and fixed inside the outer stop top cover 7 by compressing 25% of their stroke using the limiting screw 10. Then, they are fixed inside the outer stop groove 5 by connecting them with the outer stop hook 10 using screws, further compressing the stroke of the butterfly spring 7 by 25-50%, providing a continuous load for the long stop bar 9 to achieve a sealing effect. Later, rotating the adjusting screw 44 causes the adjusting block 45 to move horizontally, driving the outer stop hook 6 and the outer stop top cover 7 to move synchronously. During the movement, the long stop bar 9 always remains tightly sealed against the front end faces of the upper die 1 and the lower die 2, achieving width adjustment of the extruded product.

[0016] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A flat extrusion die head with adjustable discharge width online, comprising an upper die (1) and a lower die (2), wherein an extrusion channel (3) is provided at the front end between the upper die (1) and the lower die (2), and a screw and nut adjustment mechanism (4) is provided on the left and right sides of the upper die (1) and the lower die (2), characterized in that: The upper mold (1) and the lower mold (2) are provided with outer grooves (5) on the outer side of their front ends. Outer hooks (6) are connected in the outer grooves (5). The front ends of the two outer hooks (6) are connected as one unit by an outer top cover (7). The outer hooks (6), the outer top cover (7), the front end face of the upper mold (1), and the front end face of the lower mold (2) form an installation cavity (8). A long strip (9) is provided in the installation cavity (8). The top surface of the long strip (9) is sealed to the front end face of the upper mold (1) and the lower mold (2). A series of positioning holes are provided at intervals along the length of the bottom surface of the long strip (9). 91), the outer top cover (7) is provided with a series of threaded holes (71) spaced along the length direction. The threaded holes (71) are connected with limit screws (10). A butterfly spring (11) and a washer (12) are sleeved between the limit screw (10) and the outer top cover (7). The large end of the limit screw (10) is located in the positioning hole (91) and the two are compatible. The depth of the positioning hole (91) is greater than the height of the large end of the limit screw (10). The outer hook (6) and the outer top cover (7) are adjusted to move along the width direction by the screw nut adjustment mechanism (4).

2. The flat extrusion die head with adjustable discharge width according to claim 1, characterized in that; The lead screw nut adjustment mechanism (4) includes a side plate (41) connected to the sides of the upper mold (1) and the lower mold (2). A guide rod (42) is connected to the side plate (41). The outer end of the guide rod (42) is fixed by a fixing plate (43). An adjusting lead screw (44) is installed between the side plate (41) and the fixing plate (43) through a bushing. An adjusting block (45) is threaded onto the adjusting lead screw (44). The adjusting block (45) extends outward to form an end connection part (451). The outer stop hook (6) and the outer stop top cover (7) are connected to the end connection part (451) by screws.

3. The flat extrusion die head with adjustable discharge width according to claim 1, characterized in that; The bottom surface of the long strip (9) contacts the pad (12), and the overall compression of the two ends of the butterfly spring (11) under the compression of the pad (12) and the outer top cover (7) is 25%-75%.

4. A flat extrusion die head with adjustable discharge width according to claim 1, characterized in that; The threaded holes (71) on the outer cover (7) are evenly spaced along its length, and the positioning holes (91) on the long strip (9) are evenly spaced along its length. The screw of the limiting screw (10) is threaded into the threaded hole (71), and the end head is positioned in the positioning hole (91).

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