A raw material discharge blocking device for an extruder

Abstract

This invention relates to the field of molding extrusion technology and discloses a raw material blocking discharge device for an extruder, including a discharge pipe connecting the discharge port of a first extruder and the feed port of a distributor, with a raw material blocking discharge device installed on the discharge pipe; the raw material blocking discharge device includes a mounting base fixed to the discharge pipe, a hydraulic cylinder mounted on the top of the mounting base, a lifting column inserted into a vertical channel inside the mounting base, and a guiding component provided at the bottom of the vertical channel; a horizontal material guiding channel communicating with the vertical channel is provided in the middle of the mounting base; the bottom output end of the hydraulic cylinder is rotatably connected to the top of the lifting column; a sliding drive component is fixed at the top of the vertical channel. This invention eliminates the need to stop the machine to change raw materials, completely solving the problem of "changing color on one machine, stopping the entire line" in traditional processes, significantly reducing production interruption time, and effectively improving the overall capacity of the production line.

Description

Technical Field

[0001] This invention relates to the field of molding and extrusion technology, specifically to a raw material blocking device for an extruder. Background Technology

[0002] PVB, or polyvinyl butyral, is an important thermoplastic resin material. It is widely used in machinery, construction, and automotive industries. Current PVB extrusion molding equipment typically uses multiple extruders sharing a single distributor. Different colored PVB raw materials are extruded into the die through this distributor. Therefore, during PVB extrusion production, if the color of the raw material in one extruder needs to be changed, all other extruders must be stopped. A large amount of new raw material must then be discharged from the extruder requiring the color change, and the extruder itself must be thoroughly cleaned. Since cleaning the raw material takes time, other extruders cannot continue production after being shut down, which severely impacts production capacity. To address this, we have developed a raw material discharge blocking device for extruders. Summary of the Invention

[0003] The purpose of this invention is to provide a raw material blocking and discharge device for an extruder to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A raw material blocking discharge device for an extruder includes a discharge pipe connecting a first extruder discharge port and a distributor inlet, wherein a raw material blocking discharge device is provided on the discharge pipe;

[0006] The raw material blocking discharge device includes a mounting base fixed to the discharge pipe, a hydraulic cylinder mounted on the top of the mounting base, a lifting column inserted into the vertical channel inside the mounting base, and a conduction component set at the bottom of the vertical channel.

[0007] The mounting base is provided with a horizontal material guide channel in the middle that communicates with the vertical channel;

[0008] The bottom output end of the hydraulic cylinder is rotatably connected to the top of the lifting column;

[0009] A sliding drive assembly is fixed at the top of the vertical channel. When the hydraulic cylinder drives the lifting column to move up and down along the vertical channel, the sliding drive assembly drives the lifting column to rotate. Combined with the conduction assembly, it can block or connect the blocking discharge channel inside the lifting column with the horizontal material guide channel.

[0010] Preferably, the mounting base is fixed to the top of the mounting plate by a vertical pole, and the hydraulic cylinder is fixed to the upper end of the mounting plate in the center.

[0011] Preferably, the bottom output end of the hydraulic cylinder is provided with a piston rod, the lower end of the piston rod is provided with a connecting cylinder, the top of the lifting column is fixed with a screw and a fixing ring seat is sleeved on the screw, the turntable is inserted into the connecting cylinder, and the fixing ring seat is fixed at the bottom of the connecting cylinder.

[0012] Preferably, the sliding drive assembly includes a limiting ring fixed to the top of the vertical channel by bolts and a hemispherical sliding block fixed to the inner wall of the limiting ring. The upper side wall of the lifting column is provided with an arc-shaped sliding groove, and the hemispherical sliding block slides into the arc-shaped sliding groove.

[0013] Preferably, the guiding assembly includes a fixing plate disposed on the inner wall of the bottom of the vertical channel, a top rod fixed in the middle of the fixing plate, and a guiding valve plate fixed at the top of the top rod.

[0014] Preferably, the blocking discharge channel includes a horizontal lower channel provided at the bottom of the lifting column and an upper horizontal channel located above the horizontal lower channel. The bottom of the horizontal lower channel is provided with a vertical lower through hole in the center, and the upper end of the horizontal lower channel is provided with a vertical upper through hole in the center, which communicates with the upper horizontal channel.

[0015] The diameter of the guide valve plate is the same as the inner diameter of the vertical lower through hole and the vertical upper through hole, and the diameter of the push rod is smaller than the inner diameter of the vertical lower through hole and the vertical upper through hole.

[0016] Preferably, the lower horizontal channel and the upper horizontal channel are arranged at a predetermined angle to each other;

[0017] The two ends of the lower horizontal channel penetrate the side wall of the lifting column, and one end of the upper horizontal channel penetrates the side wall of the lifting column.

[0018] Preferably, when the horizontal lower channel is connected to the horizontal material guide channel, the guide valve plate blocks the vertical lower through hole;

[0019] When the upper horizontal channel is connected to the horizontal material guide channel, the guide valve plate extends into the upper horizontal channel through the vertical upper through hole.

[0020] Compared with existing technologies, the beneficial effects of this invention are: This invention eliminates the need for downtime to change raw materials, significantly increasing production line capacity. When it is necessary to change the color of the PVB raw material in the first extruder, the passage between the first extruder and the distributor can be blocked by the action of the raw material blocking discharge device. Simultaneously, the original raw material in the first extruder is discharged through the upper horizontal channel, the upper vertical through-hole, the lower horizontal channel, and the lower vertical through-hole. During this process, the second extruder does not need to be stopped and can continue to supply material to the die through the distributor, completely solving the problem of "changing color on one machine, stopping the entire line" in traditional processes, greatly reducing production downtime, and effectively improving the overall capacity of the production line.

[0021] This invention achieves more thorough raw material cleaning, preventing color mixing and contamination from different colored raw materials. When the original raw material is discharged from the first extruder, new raw material can be directly conveyed through the horizontal lower channel, simultaneously discharging any residual old material within the channel. Combined with the precise matching and sealing of the guide valve plate with the vertical lower and upper through holes, it ensures that no raw material remains inside the horizontal lower channel. Subsequent new material conveying will not mix with old material, fundamentally preventing color mixing defects and improving the molding quality of PVB products.

[0022] Simplifying equipment structure and control logic reduces equipment cost and failure rate: The rotating connection structure between the hydraulic cylinder and the lifting column allows for simultaneous lifting and rotation of the lifting column using only the linear lifting power of the hydraulic cylinder combined with the sliding drive assembly. No additional rotary drive source is required, simplifying the device structure and reducing equipment purchase and maintenance costs. The blocking and conduction actions can be adaptively completed simply by the displacement change of the lifting column, reducing the use of electrical control components, lowering the failure points, and improving the stability of device operation.

[0023] The precise and reliable function switching avoids operational chaos. The structural design, in which the lower and upper horizontal channels are arranged at a preset angle, combined with the precise control of the rotation angle of the lifting column by the sliding drive component, ensures that the two channels will not be connected to the horizontal material guide channel at the same time. This achieves mutually exclusive switching of the "feed-block-discharge" function, avoids the problem of material conveying chaos caused by channel misconnection, and improves the reliability of the device operation. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the overall assembly of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the raw material blocking discharge device and the discharge pipe assembled according to the present invention;

[0026] Figure 3 This is an exploded structural diagram of the raw material blocking discharge device of the present invention;

[0027] Figure 4 This is a three-dimensional structural diagram of the assembly of the hydraulic cylinder, mounting base, and fixing plate of the present invention;

[0028] Figure 5 For the present invention Figure 4 A schematic diagram of the cross-sectional structure;

[0029] Figure 6 This is a three-dimensional structural diagram of the sliding drive assembly of the present invention;

[0030] Figure 7 This is a three-dimensional structural diagram of the assembly of the turntable and the lifting column of the present invention;

[0031] Figure 8 For the present invention Figure 7 A schematic diagram of the three-dimensional structure from another perspective;

[0032] Figure 9 For the present invention Figure 8 A schematic diagram of the cross-sectional structure;

[0033] Figure 10 This is a three-dimensional structural diagram of the sliding drive assembly and the lifting column of the present invention.

[0034] Figure 11 This is a three-dimensional structural diagram of the present invention, showing the connection between the horizontal lower channel and the horizontal material guiding channel.

[0035] Figure 12 For the present invention Figure 11 A schematic diagram of the cross-sectional structure;

[0036] Figure 13 This is a three-dimensional structural diagram of the present invention, showing the connection between the horizontal channel and the horizontal material guiding channel.

[0037] Figure 14 For the present invention Figure 13 A cross-sectional structural diagram.

[0038] In the diagram: 1. Second extruder; 2. Discharge pipe; 3. Distributor; 4. Raw material blocking discharge device; 401. Hydraulic cylinder; 402. Mounting plate; 403. Vertical rod; 404. Lifting column; 405. Connecting cylinder; 406. Mounting base; 407. Limiting ring; 408. Horizontal guide channel; 409. Vertical channel; 410. Bolt; 411. Turntable; 412. Fixing ring seat; 413. Upper horizontal channel; 414. Horizontal lower channel; 415. Vertical upper through hole; 416. Piston rod; 417. Fixing plate; 418. Guide valve plate; 419. Push rod; 420. Hemispherical sliding block; 421. Screw; 422. Arc-shaped slide groove; 423. Vertical lower through hole; 5. First extruder; 6. Die. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example:

[0041] Please see Figures 1-14 The present invention provides a technical solution:

[0042] A raw material blocking discharge device for an extruder includes a discharge pipe 2 connecting the discharge port of a first extruder 5 and the feed port of a distributor 3. The feed port at the other end of the distributor 3 is connected to the discharge port of a second extruder 1 via another set of discharge pipes 2, and the bottom of the distributor 3 is connected to the top feed port of a die 6.

[0043] A raw material blocking discharge device 4 is provided on the discharge pipe 2 between the first extruder 5 and the distributor 3;

[0044] The raw material blocking discharge device 4 includes a mounting base 406 that is connected and fixed on the discharge pipe 2, a hydraulic cylinder 401 mounted on the top of the mounting base 406, a lifting column 404 inserted into the vertical channel 409 inside the mounting base 406, and a guiding component provided at the bottom of the vertical channel 409.

[0045] The mounting base 406 is fixed to the mounting plate 402 by a vertical rod 403, and the hydraulic cylinder 401 is fixed in the middle at the upper end of the mounting plate 402.

[0046] The guiding assembly includes a fixing plate 417 disposed on the inner wall of the bottom of the vertical channel 409, a top rod 419 fixed in the middle of the fixing plate 417, and a guiding valve plate 418 fixed at the top of the top rod 419.

[0047] Automatic switching of blocking state without power: The conduction component does not require an additional drive source. It can achieve adaptive blocking / insertion of the vertical lower through hole 423 and the vertical upper through hole 415 simply by changing the lifting displacement of the lifting column 404. This simplifies the control logic and reduces the number of failure points.

[0048] Good sealing performance: The guide valve plate 418 is precisely matched with the inner diameter of the through hole, which can effectively prevent the raw material from leaking from the through hole during the conveying process and ensure the conveying efficiency of the raw material; at the same time, in the discharge state, the guide valve plate 418 extends into the upper horizontal channel 413 to play a guiding role and prevent the raw material from stagnating in the channel.

[0049] The mounting base 406 has a horizontal material guide channel 408 in the middle that communicates with the vertical channel 409;

[0050] Mounting bracket 406 serves as the core load-bearing structure, allowing direct connection to the existing discharge pipe 2 without requiring modifications to the extruder body. This design offers strong compatibility and facilitates production line upgrades. The through-flow design of the horizontal guide channel 408 and the discharge pipe 2 reduces bends and resistance during raw material transport, preventing material agglomeration or degradation due to stagnation.

[0051] The bottom output end of the hydraulic cylinder 401 is rotatably connected to the top of the lifting column 404;

[0052] The bottom output end of the hydraulic cylinder 401 is provided with a piston rod 416, and the lower end of the piston rod 416 is provided with a connecting cylinder 405. The top center of the lifting column 404 is fixed with a turntable 411 by a screw 421. A fixing ring seat 412 is sleeved on the screw 421. The turntable 411 is inserted into the connecting cylinder 405, and the fixing ring seat 412 is fixed at the bottom of the connecting cylinder 405.

[0053] The rotating connection structure between the hydraulic cylinder 401 and the lifting column 404 (piston rod 416 + connecting cylinder 405 + turntable 411 + fixed ring seat 412) realizes the "lifting + rotation" compound motion of the lifting column 404: the hydraulic cylinder 401 only provides linear lifting power, and the rotation action can be completed synchronously through the rotational cooperation of the turntable 411 and the connecting cylinder 405, combined with the guidance of the sliding drive assembly. No additional rotation drive source is required, which simplifies the device structure and reduces the control complexity and equipment cost.

[0054] The rotating connection structure can buffer the torque impact during rotation, preventing the piston rod 416 from deforming or being damaged due to torsional force, thus improving the service life and operational stability of the hydraulic cylinder 401.

[0055] A sliding drive assembly is fixed at the top of the vertical channel 409;

[0056] The sliding drive assembly includes a limiting ring 407 fixed to the top of the vertical channel 409 by bolts 410 and a hemispherical sliding block 420 fixed to the inner wall of the limiting ring 407. The upper side wall of the lifting column 404 is provided with an arc-shaped sliding groove 422, and the hemispherical sliding block 420 slides in the arc-shaped sliding groove 422.

[0057] The sliding drive assembly can precisely control the rotation angle of the lifting column 404: the trajectory and length of the arc-shaped chute 422 determine the rotation angle of the lifting column 404, which can ensure the precise alignment of the horizontal lower channel 414 or the upper horizontal channel 413 with the horizontal guide channel 408, avoiding raw material leakage or blockage caused by misalignment.

[0058] Low sliding resistance and smooth movement: The hemispherical sliding block 420 and the arc-shaped sliding groove 422 are in point contact, and the frictional resistance is much smaller than that of surface contact, which reduces the risk of jamming during the lifting process and improves the action response speed and reliability.

[0059] Compact structure and high integration: The sliding drive assembly is directly installed on the top of the vertical channel 409 without occupying additional external space, which is suitable for the compact layout requirements of the extruder production line.

[0060] When the hydraulic cylinder 401 drives the lifting column 404 to move up and down along the vertical channel 409, the sliding drive assembly drives the lifting column 404 to rotate, and in conjunction with the conduction assembly, the blocking discharge channel inside the lifting column 404 is blocked or connected to the horizontal guide channel 408.

[0061] The blocking discharge channel includes a horizontal lower channel 414 provided at the lower part of the lifting column 404 and an upper horizontal channel 413 located above the horizontal lower channel 414. A vertical lower through hole 423 is provided at the center of the bottom of the horizontal lower channel 414, and a vertical upper through hole 415 is provided at the center of the upper end of the horizontal lower channel 414. The vertical upper through hole 415 is connected to the upper horizontal channel 413.

[0062] The diameter of the valve plate 418 is the same as the inner diameter of the vertical lower through hole 423 and the vertical upper through hole 415, and the diameter of the push rod 419 is smaller than the inner diameter of the vertical lower through hole 423 and the vertical upper through hole 415.

[0063] The horizontal lower channel 414 and the upper horizontal channel 413 are arranged at a preset angle to each other. The angle arrangement structure ensures that the horizontal lower channel 414 and the upper horizontal channel 413 will not be connected to the horizontal guide channel 408 at the same time, thus ensuring the uniqueness of the "feed-block-discharge" function switching and avoiding functional disorder.

[0064] The angled design matches the trajectory of the arc-shaped slide 422, allowing the lifting column 404 to complete the channel switching with only a small rotation, shortening the motion stroke and improving the switching efficiency.

[0065] Both ends of the lower horizontal channel 414 penetrate the side wall of the lifting column 404, and one end of the upper horizontal channel 413 penetrates the side wall of the lifting column 404.

[0066] When the horizontal lower channel 414 is connected to the horizontal material guide channel 408, the guide valve plate 418 blocks the vertical lower through hole 423.

[0067] When the upper horizontal channel 413 is connected to the horizontal material guide channel 408, the guide valve plate 418 extends into the upper horizontal channel 413 through the vertical upper through hole 415.

[0068] Specifically, when using it:

[0069] This invention is used to achieve precise control of the material supply from the first extruder 5 and the second extruder 1 to the die 6. The core mechanism involves the lifting and rotating linkage of the material blocking and discharging device 4 to switch the connection state between the lower horizontal channel 414 or the upper horizontal channel 413 and the horizontal guide channel 408, thereby completing the switching of material conveying, blocking, or discharging functions. The specific process is as follows:

[0070] The hydraulic cylinder 401 drives the piston rod 416 to retract upward, which in turn drives the connecting cylinder 405 and the lifting column 404 rotatably connected thereto to move upward along the vertical channel 409 inside the mounting base 406.

[0071] During this process, the hemispherical sliding block 420 on the inner wall of the limiting ring 407 slides along the arc-shaped sliding groove 422 on the upper part of the lifting column 404, driving the lifting column 404 to rotate synchronously to a preset angle, so that the horizontal lower channel 414 is completely aligned and connected with the horizontal material guide channel 408 in the middle of the mounting base 406.

[0072] At the same time, the upper horizontal channel 413 and the horizontal material guide channel 408 are misaligned, thus completing the blocking.

[0073] At this time, the guide valve plate 418 in the guide assembly, supported by the push rod 419, is precisely embedded in the vertical lower through hole 423 at the bottom of the horizontal lower channel 414 and is blocked. The raw material flows from the discharge pipe 2 of the first extruder 5 into the horizontal guide channel 408, and after passing through the horizontal lower channel 414, it continues to be transported to the distributor 3 and finally enters the mold 6 for forming.

[0074] When it is necessary to change the color of the raw material in the first extruder 5, the hydraulic cylinder 401 drives the piston rod 416 to extend downward, which in turn drives the lifting column 404 to move downward along the vertical channel 409. The hemispherical sliding block 420 slides in the opposite direction along the arc-shaped sliding groove 422, which drives the lifting column 404 to rotate in the opposite direction, so that the upper horizontal channel 413 is aligned and connected with the horizontal material guide channel 408.

[0075] In this state, the lifting column 404 moves down, causing the vertical upper through hole 415 to move down synchronously. The guide valve plate 418 is released from the blockage of the vertical lower through hole 423 and extends into the upper horizontal channel 413 through the vertical upper through hole 415.

[0076] At the same time, the horizontal lower channel 414 and the horizontal material guide channel 408 are misaligned, thus completing the blocking.

[0077] At this time, the raw material in the first extruder 5 can enter the upper horizontal channel 413 and enter the lower horizontal channel 414 through the vertical upper through hole 415, and then be discharged through the vertical lower through hole 423. In this way, after the raw material in the first extruder 5 is replaced, the new raw material can discharge the original raw material in the lower horizontal channel 414 together, which prepares for the subsequent new raw material to enter the distributor 3 through the lower horizontal channel 414.

[0078] The second extruder 1 can normally input raw materials into the die 6 through another set of discharge pipes 2 and distributors 3, and the second extruder 1 does not need to be stopped.

[0079] After the original raw material in the first extruder 5 is discharged, the hydraulic cylinder 401 drives the piston rod 416 to retract upward, which in turn drives the lifting column 404 to move upward along the vertical channel 409 until the horizontal lower channel 414 is fully aligned and connected with the horizontal guide channel 408 again. The guide valve plate 418 is embedded in the vertical lower through hole 423 and achieves blockage. At this time, the new raw material in the first extruder 5 can continue to be transported to the distributor 3 through the horizontal lower channel 414, the horizontal guide channel 408 and the corresponding discharge pipe 2, and finally enter the mold 6 for forming.

[0080] Since the new raw material is discharged through the horizontal lower channel 414, the original raw material in the horizontal lower channel 414 can be discharged together. The interior of the horizontal lower channel 414 is cleaned and no original raw material is left. When the new raw material is transported to the distributor 3 through the horizontal lower channel 414, the horizontal guide channel 408 and the corresponding discharge pipe 2, there is no situation where the original raw material is transported to the mold 6.

[0081] Dual extruder collaborative feeding logic: The second extruder 1 is connected to the distributor 3 through another set of discharge pipes 2. After the distributor 3 integrates the raw materials of the first extruder 5 and the second extruder 1, it is uniformly transported to the die 6. After the raw material blocking discharge device 4 blocks the first extruder 5 from the distributor 3, the second extruder 1 normally supplies materials to the distributor 3 and the die 6. The raw material in the first extruder 5 is discharged through the bottom of the raw material blocking discharge device 4, realizing the switching between collaborative feeding or individual feeding of the two extruders.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A raw material blocking discharge device for an extruder, comprising a discharge pipe connecting the discharge port of a first extruder and the feed port of a distributor, characterized in that: The discharge pipe is equipped with a raw material blocking discharge device; The raw material blocking discharge device includes a mounting base fixed to the discharge pipe, a hydraulic cylinder mounted on the top of the mounting base, a lifting column inserted into the vertical channel inside the mounting base, and a conduction component set at the bottom of the vertical channel. The mounting base is provided with a horizontal material guide channel in the middle that communicates with the vertical channel; The bottom output end of the hydraulic cylinder is rotatably connected to the top of the lifting column; A sliding drive assembly is fixed at the top of the vertical channel. When the hydraulic cylinder drives the lifting column to move up and down along the vertical channel, the sliding drive assembly drives the lifting column to rotate. Combined with the conduction assembly, it can block or connect the discharge channel inside the lifting column with the horizontal material guide channel. The conduction assembly includes a fixing plate installed on the inner wall of the bottom of the vertical channel, a top rod fixed in the middle of the fixing plate, and a conduction valve plate fixed at the top of the top rod; The blocking discharge channel includes a horizontal lower channel provided at the bottom of the lifting column and an upper horizontal channel located above the horizontal lower channel. A vertical lower through hole is provided at the center of the bottom of the horizontal lower channel, and a vertical upper through hole is provided at the center of the upper end of the horizontal lower channel. The vertical upper through hole is connected to the upper horizontal channel. The diameter of the guide valve plate is the same as the inner diameter of the vertical lower through hole and the vertical upper through hole, and the diameter of the push rod is smaller than the inner diameter of the vertical lower through hole and the vertical upper through hole; The horizontal lower channel and the upper horizontal channel are arranged at a preset angle to their central axes; The two ends of the lower horizontal channel penetrate the side wall of the lifting column, and one end of the upper horizontal channel penetrates the side wall of the lifting column. When the horizontal lower channel is connected to the horizontal material guide channel, the guide valve plate blocks the vertical lower through hole; When the upper horizontal channel is connected to the horizontal material guide channel, the guide valve plate extends into the upper horizontal channel through the vertical upper through hole.

2. The raw material discharge blocking device for an extruder according to claim 1, characterized in that: The mounting base is fixed to the top of the mounting plate by a vertical pole, and the hydraulic cylinder is fixed to the upper end of the mounting plate in the center.

3. The raw material discharge blocking device for an extruder according to claim 1, characterized in that: The hydraulic cylinder has a piston rod at the bottom output end, and a connecting cylinder at the lower end of the piston rod. A turntable is fixed to the top center of the lifting column by a screw. A fixing ring seat is sleeved on the screw. The turntable is inserted into the connecting cylinder, and the fixing ring seat is fixed to the bottom of the connecting cylinder.

4. The raw material discharge blocking device for an extruder according to claim 1, characterized in that: The sliding drive assembly includes a limiting ring fixed to the top of the vertical channel by bolts and a hemispherical sliding block fixed to the inner wall of the limiting ring. The upper side wall of the lifting column is provided with an arc-shaped sliding groove, and the hemispherical sliding block slides into the arc-shaped sliding groove.

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