Injection molding tool for engineering plastics processing

Abstract

The invention relates to the field of plastic processing, and discloses an injection molding tool for engineering plastic processing, comprising a bottom plate, a feeding chamber, an upper mold and a lower mold, wherein a feeding chamber is arranged directly above the bottom plate, a de-impurity structure is arranged in the feeding chamber, and a feeding hole is opened on the left wall of the feeding chamber, and a first cylinder drives a movable plate to move up and down to extrude and melt the plastic to pass through the de-impurity plate for de-impurity removal, and at the same time, one end of an insertion rod slides in a groove to drive a vertical rod, a stirring rod and a rotating rod to rotate as a whole to stir the de-impurity plastic, thereby ensuring the stirring quality of the plastic, and at the same time, a conical-shaped de-impurity block is arranged at the bottom end of a de-impurity rod connected in the middle below the movable plate, so that the movable plate can drive the de-impurity block to move up and down in a discharge barrel while moving up and down, and plays a role of de-impurity during discharge, thereby reducing the problem of discharge blockage.

Description

Technical Field

[0001] The invention relates to the field of plastic processing, in particular to an injection molding tool for engineering plastic processing. Background Art

[0002] Plastic particles refer to granular plastics, which are generally divided into more than 200 types and subdivided into thousands of types. Common plastic particles include general-purpose plastics, engineering plastics and special plastics. Compared with general-purpose plastics, engineering plastics have excellent heat and cold resistance, excellent mechanical properties in a wide temperature range, suitable for use as structural materials, good corrosion resistance, less affected by the environment, and good durability.

[0003] When engineering plastics are injection molded on an injection molding tool, the melted plastic is fed into the injection mold through a feeding chamber. However, the melted plastic particles have a certain viscosity, and the effect of feeding them in the feeding chamber is poor, which in turn affects the quality and efficiency of the processing. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an injection molding tool for processing engineering plastics.

[0005] The present invention provides an injection molding tool for engineering plastic processing, which adopts the following technical solution:

[0006] An injection molding tool for processing engineering plastics, comprising a bottom plate, a feeding chamber, an upper mold and a lower mold, a feeding chamber is arranged just above the bottom plate, a debris removal structure is arranged in the feeding chamber, a feeding hole is arranged on the left wall of the feeding chamber, the feeding hole is used to convey the crushed, mixed and melted plastics, a feeding piece is connected to the bottom end of the feeding chamber, the bottom end of the feeding piece is mounted on the upper mold, a feeding hole is arranged in the feeding piece, the two ends of the feeding hole are respectively connected with the feeding chamber and the upper mold, a blocking structure is arranged at the bottom end of the feeding piece, support rods are fixedly passed through the four corners of the upper mold, the bottom ends of the support rods are fixedly connected to the bottom plate, the lower mold is movably sleeved on the four support rods, and a lifting structure for lifting and lowering the lower mold for injection molding is arranged on the bottom plate;

[0007] The impurity removal structure includes two fixed plates installed near the lower position in the feeding chamber, a first pull-out frame is inserted into the upper fixed plate, and a second pull-out frame is inserted into the lower fixed plate, and both the first pull-out frame and the second pull-out frame are provided with impurity removal plates;

[0008] A first cylinder is installed at the top of the feeding chamber, and a movable plate is connected to the bottom end of the output shaft of the first cylinder. The sealing ring on the side of the movable plate is tightly attached to the inner wall of the feeding chamber. A baffle is connected to the position of the movable plate near the feeding hole, and two connecting pipes are connected to the middle of the lower side of the movable plate along its width direction. The two connecting pipes are distributed at positions near the edges on both sides of the lower side of the movable plate. A rotating rod is rotated and passed through the position corresponding to each connecting pipe on the two fixed plates, and the top end of each rotating rod is inserted into the corresponding connecting pipe. A plug rod is laterally fixed and inserted into the position near the bottom end of the connecting pipe. A groove is opened on the rotating rod, and the groove is spirally shaped on the rotating rod. One end of the plug rod is movably inserted into the groove. A vertical rod is connected to the bottom end of each rotating rod, and a plurality of stirring rods are connected to the vertical rod.

[0009] Preferably, each of the fixed plates is in an "E" shape, two impurity removal plates are arranged in the first drawer frame and the second drawer frame, and the two impurity removal plates in each group are arranged in the two fixed plates respectively.

[0010] Preferably, two pressing tubes are respectively provided on one side surface of the first pull-out frame and the second pull-out frame passing through the feeding chamber, and the two pressing tubes in each group are respectively arranged corresponding to the positions of the two impurity removing plates. The first pull-out frame and the second pull-out frame are both provided with slots for the pressing tubes to be inserted into, and a pressing block is provided on the end of the pressing tube passing through the slot, and a first spring is connected between the end of the pressing tube away from the pressing block and the inner end groove wall of the slot, and a clamping rod for passing through the pressing tube is connected to the inner side surface of the pressing block, and the end of the clamping rod away from the pressing block is in a barb shape, an inner frame is provided below the inner wall of the first pull-out frame and the second pull-out frame, the impurity removing plate is supported on the inner frame, and a clamping slot is provided below the impurity removing plate near the clamping rod, and one end of the clamping rod is tightened in the clamping slot.

[0011] Preferably, a dredging rod is connected to the middle of the bottom of the movable plate, and the dredging rod passes through the through hole in the middle of the movable plate. The dredging rod extends to the bottom end above the discharge hole and is connected to a dredging block, and the dredging block is in the shape of a cone.

[0012] Preferably, the lateral edges of the first pull-out frame and the second pull-out frame protrude beyond their longitudinal edges, two first tightening grooves are provided on the front side of the feeding chamber, through grooves are provided on the groove walls of the first tightening grooves for the longitudinal edges of the first pull-out frame and the second pull-out frame to pass through, and a second tightening groove is provided on the rear inner wall of the fixed plate.

[0013] Preferably, a mounting plate is fastened with screws in the upper middle part of the front side of the feeding chamber, a second cylinder is installed on the mounting plate on the side away from the feeding chamber, a through rod is fixed through the bottom end of the output shaft of the second cylinder, a first guide frame and a second guide frame are sleeved on both ends of the through rod, the first guide frame and the second guide frame are both in an "L" shape, the bottom end of the first guide frame is connected to the first pull-out frame, the second guide frame is connected to the second pull-out frame through a connecting rod, and the first guide frame and the second guide frame are both provided with two vertical sections and an inclined section.

[0014] Preferably, the blocking structure includes a bottom groove opened on the bottom end surface of the blanking piece, a baffle plate passing horizontally through the bottom groove, both ends of the baffle plate movably passing through the blanking piece, a blanking groove is opened on the baffle plate, a second spring is connected between the protrusions on both sides of one end of the baffle plate and the blanking piece, and a pull-out strip is connected in the middle of the other end of the baffle plate.

[0015] Preferably, the lifting structure includes a third cylinder installed on the bottom plate on both sides of the lower mold, the bottom ends of the two third cylinder output shafts are connected to the lower mold, an L-shaped rod is connected to the middle of the side of the lower mold, and a pulley is mounted on the end of the L-shaped rod away from the lower mold, a vertical plate is arranged on the right side above the bottom plate, the vertical plate is fastened to the pull-out strip by screws, a guide plate is arranged at the front of the vertical plate, a push edge is arranged on the side surface of the guide plate away from the lower mold, and a reset edge is arranged on the side surface of the lower mold close to the lower mold, the push edge is in a "Z" shape, and the reset edge is in an "L" shape, and the upper and lower surfaces of the guide plate are both horizontal.

[0016] In summary, the present invention includes the following beneficial technical effects:

[0017] 1. The present invention provides a first cylinder, a movable plate, a fixed plate and a cleaning plate on the feeding chamber, and a connecting pipe, a rotating rod, a groove, an insert rod, a vertical rod and a stirring rod on the movable plate and the fixed plate, so that the first cylinder drives the movable plate to move up and down to squeeze the melted plastic to pass through the cleaning plate for cleaning, and at the same time, the vertical rod, the stirring rod and the rotating rod can be driven to rotate as a whole by sliding one end of the insert rod in the groove to stir the cleaned plastic, thereby ensuring the stirring quality of the plastic. At the same time, a dredging block in the shape of a frustum is provided at the bottom end of the dredging rod connected to the middle part under the movable plate, so that the movable plate can drive the dredging block to move up and down in the discharge barrel when moving up and down, and play a role of dredging when discharging, thereby reducing the problem of material blockage.

[0018] 2. The present invention provides a first drawer frame and a second drawer frame on two fixed plates respectively, and both the first drawer frame and the second drawer frame are provided with a debris removal plate, and both the first drawer frame and the second drawer frame are arranged outside the feeding chamber. When the debris removal plate on the first drawer frame needs to be cleaned or replaced after long-term use, the second drawer frame and the corresponding debris removal plate can be inserted into the feeding chamber, and then the first drawer frame can be pulled out. In this way, the corresponding debris removal plate can be cleaned or replaced while the plastic processing work is being carried out, thereby improving the work efficiency and ensuring the quality of the debris removal of the plastic;

[0019] 3. The present invention provides a mounting plate, a second cylinder, a first guide frame, a second guide frame and a through rod at the front of the feeding chamber. The first guide frame and the second guide frame are respectively arranged on the first pull-out frame and the second pull-out frame. When it is necessary to clean or replace the debris removal plate on the first pull-out frame, it is only necessary to start the second cylinder to drive the two ends of the through rod to slide downward in the first guide frame and the second guide frame, so that the second pull-out frame and the corresponding debris removal plate can be automatically inserted into the feeding chamber, and the first pull-out frame and the corresponding debris removal plate can be automatically drawn out from the feeding chamber to clean or replace them. The operation is more labor-saving and convenient, and the work efficiency is improved.

[0020] 4. The top end of the output shaft of the third cylinder on the bottom plate of the present invention is connected with the lower mold, an L-shaped rod and a pulley are arranged on the material discharge, a guide plate is arranged on the vertical plate at one end of the pull-out strip, and a pushing edge and a reset edge are arranged on the guide plate. When the third cylinder is started to drive the lower mold to move upward for injection molding, the pulley is used to roll on the pushing edge to push the movement of the baffle plate in the bottom groove, which can drive the upper and lower material grooves of the baffle plate to be connected with the material discharge hole to realize the automatic material discharge function. When the third cylinder drives the lower mold to move downward to complete the injection molding work, the sliding of the pulley at the reset edge can be used to reset the baffle plate in cooperation with the elastic force of the second spring, so that the material discharge groove and the material discharge hole can be staggered to realize the automatic blocking function. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an injection molding tool for processing engineering plastics in an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the feeding chamber and the unloading part in the embodiment of the present invention;

[0023] Figure 3 In the embodiment of the present invention Figure 2 A magnified view of the structure at A;

[0024] Figure 4 Schematic diagram of the internal structure of the feeding chamber and the unloading part in the embodiment of the present invention;

[0025] Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure at B;

[0026] Figure 6 Schematic diagram of the structure of the bottom groove at the bottom end of the blanking piece in an embodiment of the present invention;

[0027] Figure 7 Schematic diagram of the structure of the upper die and the lower die in an embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the fixed plate, the second drawer frame and the impurity removal plate in an embodiment of the present invention;

[0029] Fig. 9 2 is a schematic diagram of the split structure between the second drawer frame and the impurity removal plate in an embodiment of the present invention;

[0030] Fig.10 In the embodiment of the present invention Fig. 9 Enlarged view of the structure at location C.

[0031] Description of reference numerals: 1, bottom plate; 2, feeding chamber; 3, unloading member; 4, upper die; 5, lower die; 6, support rod; 7, unloading hole; 8, first cylinder; 9, movable plate; 10, baffle; 11, feeding hole; 12, impurity removal plate; 13, connecting pipe; 14, vertical rod; 15, stirring rod; 16, rotating rod; 17, fixed plate; 18, groove; 19, plug rod; 20, dredging rod; 21, dredging block; 22, first pull-out frame; 23, second pull-out frame; 24, first tight groove; 25 , second tightening groove; 26, inner frame; 27, clamping groove; 28, pressing tube; 29, pressing block; 30, clamping rod; 31, first spring; 32, mounting plate; 33, second cylinder; 34, first guide frame; 35, second guide frame; 36, through rod; 37, bottom groove; 38, material discharge chute; 39, pull-out strip; 40, material baffle plate; 41, second spring; 42, third cylinder; 43, L-shaped rod; 44, pulley; 45, vertical plate; 46, guide plate; 47, pushing edge; 48, reset edge. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-Figure 10 The present invention is described in further detail.

[0033] The embodiment of the present invention discloses an injection molding tool for processing engineering plastics, including a bottom plate 1, a feeding chamber 2, an upper mold 4 and a lower mold 5. The feeding chamber 2 is arranged directly above the bottom plate 1, and a de-impurity structure is arranged in the feeding chamber 2. A feeding hole 11 is opened on the left wall of the feeding chamber 2, and the feeding hole 11 is used to convey the crushed, mixed and melted plastics. The plastics are crushed, mixed and melted by a roller crusher, a mixer and a screw injection molding machine. The roller crusher, the mixer and the screw injection molding machine can be directly purchased on the market, and the structure is not repeated. The bottom end of the feeding chamber 2 is connected to a feeding piece 3, and the bottom end of the feeding piece 3 is installed on the upper mold 4. A feeding hole 7 is opened in the feeding piece 3, and the two ends of the feeding hole 7 are respectively connected to the feeding chamber 2 and the upper mold 4 The upper mold 4 is connected, and a blocking structure is provided at the bottom end of the blanking piece 3. Support rods 6 are fixedly passed through the four corners of the upper mold 4. The bottom ends of the support rods 6 are fixedly connected to the bottom plate 1. The lower mold 5 is movably sleeved on the four support rods 6. The bottom plate 1 is provided with a lifting structure for lifting and lowering the lower mold 5 for injection molding; the impurity removal structure includes two fixed plates 17 installed near the lower position in the feeding chamber 2, a first pull-out frame 22 is movably inserted into the upper fixed plate 17, and a second pull-out frame 23 is movably inserted into the lower fixed plate 17, and impurity removal plates 12 are provided in the first pull-out frame 22 and the second pull-out frame 23; a first cylinder 8 is installed at the top of the feeding chamber 2, and a movable plate 9 is connected to the bottom end of the output shaft of the first cylinder 8, and a sealing ring on the side of the movable plate 9 is attached Tightly on the inner wall of the feeding chamber 2, a baffle 10 is connected to the position of the movable plate 9 near the feed hole 11, and two connecting pipes 13 are connected to the middle of the movable plate 9 along its width direction. The two connecting pipes 13 are distributed at the positions near the edges on both sides of the lower side of the movable plate 9. A rotating rod 16 is rotated through the position corresponding to each connecting pipe 13 on the two fixed plates 17. The top of each rotating rod 16 is inserted into the corresponding connecting pipe 13, and a plug rod 19 is fixedly inserted into the position near the bottom end of the connecting pipe 13 laterally. A groove 18 is opened on the rotating rod 16, and the groove 18 is spiral on the rotating rod 16. One end of the plug rod 19 is movably inserted into the groove 18, and a vertical rod 14 is connected to the bottom end of each rotating rod 16, and a plurality of stirring rods are connected to the vertical rod 14. After the rod 15 passes the molten plastic into the feeding chamber 2 from the feeding hole 11, the first cylinder 8 is started to drive the movable plate 9 to move up and down in the feeding chamber 2, and the molten plastic in the feeding chamber 2 is squeezed and moved up and down from the impurity removal plate 12 to remove impurities in the plastic. When the movable plate 9 moves down to the position below the feeding hole 11, it drives the blocking plate 10 to move down to the feeding hole 11 to block it, so as to prevent the plastic from entering the position above the movable plate 9, which causes the problem of being difficult to clean. In addition, as the movable plate 9 moves up and down, one end of the insertion rod 19 is driven to slide in the spiral groove 18, which can drive the vertical rod 14, the stirring rod 15 and the rotating rod 16 to rotate as a whole, so as to automatically stir the impurity-removed plastic.A dredging rod 20 is connected to the middle of the lower part of the movable plate 9. The dredging rod 20 movably passes through the through hole in the middle of the movable plate 9. The dredging rod 20 extends to the bottom end above the material discharge hole 7 and is connected to a dredging block 21. The dredging block 21 is in the shape of a frustum. When the movable plate 9 moves up and down, it drives the dredging block 21 at the bottom end of the dredging rod 20 to move up and down in the material discharge part 3. When the material is discharged, it can play a role in dredging in the material discharge part 3, reduce the problem of blockage in the material discharge process, and improve work efficiency. ;

[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 8 , Fig. 9 and Fig.10 Each fixed plate 17 is in an "E" shape, and two impurity removal plates 12 are arranged in the first pull-out frame 22 and the second pull-out frame 23. The two impurity removal plates 12 of each group are respectively arranged in the two fixed plates 17. The fixed plates 17 are arranged in an "E" shape, so that the vertical rod 14 and the dredging rod 20 can smoothly pass through the fixed plates 17 to perform stirring and dredging work;

[0035] Two pressing tubes 28 are respectively arranged on one side surface of the first pull-out frame 22 and the second pull-out frame 23 passing through the feeding chamber 2, and the two pressing tubes 28 of each group are respectively arranged corresponding to the positions of the two impurity removing plates 12. The first pull-out frame 22 and the second pull-out frame 23 are both provided with slots for the pressing tubes 28 to be movably inserted into, and a pressing block 29 is arranged on one end of the pressing tube 28 passing through the slot, and a first spring 31 is connected between the end of the pressing tube 28 away from the pressing block 29 and the inner end groove wall of the slot, and a clamping rod 30 passing through the pressing tube 28 is connected to the inner side surface of the pressing block 29, and the end of the clamping rod 30 away from the pressing block 29 is in a barb shape, and an inner frame 26 is arranged below the inner wall of the first pull-out frame 22 and the second pull-out frame 23, and the impurity removing plate 12 is supported on the inner frame 26, and the position below the impurity removing plate 12 near the clamping rod 30 A card slot 27 is provided at the first drawer 22, and one end of the card rod 30 is tightened in the card slot 27. The card slot 27 is in a barb shape. When the impurity removal plate 12 on the first drawer frame 22 needs to be cleaned or replaced after being used for a long time, first, the second drawer frame 23 and the corresponding impurity removal plate 12 can be inserted into the feeding chamber 2 to continue the impurity removal work of the plastic, and then the first drawer frame 22 is pulled out from the feeding chamber 2 to drive the impurity removal plate 12 to be cleaned or replaced, and the pressing block 29 is pressed on one side of the impurity removal plate 12 on the first drawer frame 22 to drive the pressing tube 28 and the card rod 30 to move as a whole, and one end of the card rod 30 is pushed out of the card slot 27. After the impurity removal plate 12 is released from the first drawer frame 22, the corresponding impurity removal plate 12 can be disassembled for cleaning or replacement, which is simple and convenient to operate.

[0036] The first drawer frame 22 and the second drawer frame 23 are arranged with their transverse edges protruding from their longitudinal edges, and two first abutting grooves 24 are provided at the front of the feeding chamber 2. A through groove for the longitudinal edges of the first drawer frame 22 and the second drawer frame 23 to pass through is provided on the groove wall of the first abutting groove 24. A second abutting groove 25 is provided on the inner wall of the rear side of the fixing plate 17. When the first drawer frame 22 and the second drawer frame 23 are pulled out or inserted, the transverse edges on the first drawer frame 22 and the second drawer frame 23 can be driven to be inserted into the first abutting groove 24, so as to seal the through groove and reduce the leakage of plastic and the heat dissipation problem in the feeding chamber 2.

[0037] A mounting plate 32 is fastened with screws at the middle of the upper front of the feeding chamber 2. A second cylinder 33 is mounted on the mounting plate 32 on the side away from the feeding chamber 2. A through rod 36 is fixedly passed through the bottom end of the output shaft of the second cylinder 33. A first guide frame 34 and a second guide frame 35 are sleeved on both ends of the through rod 36. The first guide frame 34 and the second guide frame 35 are both in an "L" shape (the shapes of the first guide frame 34 and the second guide frame 35 are as shown in FIG. Figure 2 As shown in the figure, the bottom end of the first guide frame 34 is connected to the first pull-out frame 22, and the second guide frame 35 is connected to the second pull-out frame 23 through a connecting rod. The first guide frame 34 and the second guide frame 35 are both provided with two vertical and inclined sections. When it is necessary to clean or replace the debris removal plate 12 on the first pull-out frame 22 after long-term use, the second cylinder 33 can be started to drive the through rod 36 to move downward. The through rod 36 first slides downward on the vertical section of the first guide frame 34 and the inclined section of the second guide frame 35, and the first The pull-out frame 22 maintains a different position, and the second pull-out frame 23 is moved and inserted into the feeding chamber 2 to ensure the normal plastic impurity removal work. As the through rod 36 continues to move downward, the through rod 36 slides downward on the inclined section of the first guide frame 35 and the vertical section of the second guide frame 34. The second pull-out frame 23 maintains a different position, and the first pull-out frame 22 is automatically pulled out from the feeding chamber 2. The impurity removal plate 12 on the first pull-out frame 22 is cleaned or replaced, which makes the operation more labor-saving and convenient, and improves work efficiency.

[0038] See also Figure 1 , Figure 6 and Figure 7The blocking structure includes a bottom groove 37 provided on the bottom end surface of the blanking member 3, a baffle plate 40 is movably passed through the bottom groove 37, the baffle plate 40 is tightly attached to the upper groove wall of the bottom groove 37, and both ends of the baffle plate 40 are movably passed through the blanking member 3, a blanking groove 38 is provided on the baffle plate 40, and a second spring 41 is connected between the protrusions on both sides of one end of the baffle plate 40 and the blanking member 3, and a pull-out strip 39 is connected to the middle of the other end of the baffle plate 40. When blanking, the pull-out strip 39 can be used to push the baffle plate 40 to move. When the upper and lower material grooves 38 of the baffle plate 40 move to the bottom of the blanking hole 7, the blanking member 3 can be opened for blanking. When the pull-out strip 39 is released, the baffle plate 40 can be pushed to reset under the elastic force of the second spring 41 to achieve the blocking work;

[0039] The lifting structure includes a third cylinder 42 installed on the bottom plate 1 and located on both sides of the lower mold 5. The bottom ends of the output shafts of the two third cylinders 42 are connected to the lower mold 5. An L-shaped rod 43 is connected to the middle of the side of the lower mold 5. A pulley 44 is movably sleeved on the end of the L-shaped rod 43 away from the lower mold 5. A vertical plate 45 is arranged on the right side of the bottom plate 1. The vertical plate 45 is fastened to the pull-out strip 39 by screws. A guide plate 46 is arranged on the front of the vertical plate 45. A push edge 47 is arranged on the side surface of the guide plate 46 away from the lower mold 5. A reset edge 48 is arranged on the side surface of the lower mold 5 close to the lower mold 5. The push edge 47 is in a "Z" shape, and the reset edge 48 is in an "L" shape. The upper and lower surfaces of the guide plate 46 are both horizontal planes (the shape of the guide plate 46 is as shown in FIG. Figure 7 As shown in the figure, when the third cylinder 42 is started to drive the lower mold 5 to move vertically upward toward the upper mold 4 for injection molding, the lower mold 5 drives one end of the L-shaped rod 43 to slide on the pushing edge 47 of the guide plate 46, and automatically pushes the baffle plate 40 to move in the bottom groove 37 by squeezing the pushing edge 47, connecting the discharge groove 38 and the discharge hole 7 for discharge injection molding. After the lower mold 5 moves up and is tightly attached to the upper mold 4, the pulley 44 is separated from the top of the pushing edge 47, and the elastic force of the second spring 41 is used to push the baffle plate 40 to move in the opposite direction and reset, realizing automatic After injection molding, the third cylinder 42 drives the lower mold 5 to move downward, drives the pulley 44 to slide on the reset edge 48 of the guide plate 46, and pushes the baffle plate 40 to drive the discharge trough 38 to move toward the side away from the discharge hole 7, so that the lower mold 5 always maintains a blocked state for the discharge piece 3 when moving downward to reduce the waste of plastic. When the lower mold 5 moves down to the bottom plate 1, the elastic force of the second spring 41 can be used to reset the baffle plate 40 and the guide plate 46 as a whole, thereby realizing automatic blocking and discharge functions on the discharge piece 3.

[0040] The implementation principle of an injection molding tool for processing engineering plastics in an embodiment of the present invention is as follows: first, the molten plastic is transported from the feed hole 11 to the feeding chamber 2, and the molten plastic enters the position between the impurity removal plate 12 and the movable plate 9 in the feeding chamber 2, and then the first cylinder 8 is started to drive the movable plate 9 to move up and down in the feeding chamber 2, and the molten plastic is pushed to pass through the impurity removal plate 12 by squeezing the plastic, and the impurities in the plastic are removed by the impurity removal plate 12 to ensure the processing quality of the plastic, and when the movable plate 9 moves down to the position below the feed hole 11, it drives the baffle 10 to move down to the feed hole 11 to block the feed hole 11 to prevent the molten plastic from passing into the upper part of the movable plate 9, which is difficult to clean. , and in the process of the movable plate 9 moving up and down, the plug rod 19 at the bottom end of the connecting tube 13 is driven to slide in the groove 18 on the vertical rod 14, so as to drive the vertical rod 14, the stirring rod 15 and the rotating rod 16 to rotate as a whole, thereby automatically stirring the plastic after impurities removal, and then start the third cylinder 42 to drive the lower mold 5 to move upward toward the upper mold 4. At the same time, the pulley 44 at one end of the L-shaped rod 43 is driven to slide on the pushing edge 47 of the guide plate 46, and the pulley 44 is used to squeeze the pushing edge 47 to push the baffle plate 40 to slide in the bottom groove 37, stretching the second spring 41, thereby driving the unloading groove 38 on the baffle plate 40 to communicate with the unloading hole 7, opening the unloading piece 3 for unloading, and when the lower mold 5 moves up to fit the upper mold 4, the pulley 44 slides to the maximum At the high position, the pulley 44 is inferred from the upper edge of the pushing edge 47, and the elastic force of the second spring 41 is used to reset the baffle plate 40, so that the material discharge groove 38 and the material discharge hole 7 are staggered to automatically block the material discharge part 3 and stop the material discharge. After the injection molding is completed, the third cylinder 42 drives the lower mold 5 to move downward, and drives the pulley 44 to slide downward on the reset edge 48 of the guide plate 46, and through the extrusion of the reset edge 48, the upper and lower material grooves 38 of the baffle plate 40 are pushed to move away from the material discharge hole 7, so that the material discharge part 3 always remains in a blocked state, and the second spring 41 is compressed. When the lower mold 5 moves down to the bottom plate 1, the elastic force of the second spring 41 is used to reset the baffle plate 40, and then the plastic product after injection molding is taken out from the mold groove of the lower mold 5. However, when the impurity removal plate 12 on the first pull-out frame 22 needs to be cleaned or replaced after long-term use, the second cylinder 33 can be started to drive the penetration rod 36 to slide downward in the first guide frame 34 and the second guide frame 35. The penetration rod 36 first slides downward at the vertical section of the first guide frame 34 and the inclined section of the second guide frame 35. By squeezing the inner wall of the second guide frame 35, the first pull-out frame 22 remains in position and automatically pushes the second pull-out frame 23 and the corresponding impurity removal plate 12 to be inserted into the feeding chamber 2 to continue the impurity removal work of the plastic, which can ensure that the processing of the plastic is always carried out and the work efficiency is guaranteed. Then the penetration rod 36 continues to move downward, and the penetration rod 36 slides downward at the inclined section of the first guide frame 34 and the vertical section of the second guide frame 35.The second drawer frame 23 inserted into the feeding chamber 2 remains in position, and the first drawer frame 22 and the corresponding dust-removing plate 12 are pushed out of the feeding chamber 2 by squeezing the inner wall of the first guide frame 34. Then, the button 29 is pressed on the first drawer frame 22, driving one end of the clamping rod 30 to be pushed out from the clamping groove 27, and the fixing of the dust-removing plate 12 on the first drawer frame 22 is released. In this way, the corresponding dust-removing plate 12 can be removed from the first drawer frame 22 for cleaning or replacement. The operation is simple and convenient. When it is necessary to clean or replace the dust-removing plate 12 on the second drawer frame 23, it is only necessary to start the second cylinder 33 to drive the through rod 36 to move upward, so that the first drawer frame 22 and the dust-removing plate 12 after cleaning or replacement can be driven to be inserted into the feeding chamber 2, and then the second drawer frame 23 and the corresponding dust-removing plate 12 that needs to be cleaned or replaced can be pushed out. While ensuring work efficiency, it also facilitates the cleaning or replacement of the dust-removing plate 12.

[0041] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding tool for processing engineering plastics, comprising a base plate (1), a feeding chamber (2), an upper mold (4) and a lower mold (5), characterized in that: A feeding chamber (2) is arranged directly above the bottom plate (1), and a cleaning structure is arranged in the feeding chamber (2). A feeding hole (11) is arranged on the left wall of the feeding chamber (2), and the feeding hole (11) is used to convey the crushed, mixed and melted plastic. The bottom end of the feeding chamber (2) is connected to a feeding piece (3), and the bottom end of the feeding piece (3) is mounted on the upper mold (4). A feeding hole (7) is arranged in the feeding piece (3), and the two ends of the feeding hole (7) are respectively connected to the feeding chamber (2) and the upper mold (4). A blocking structure is arranged at the bottom end of the feeding piece (3). Support rods (6) are fixedly passed through the four corners of the upper mold (4), and the bottom ends of the support rods (6) are fixedly connected to the bottom plate (1). A lower mold (5) is movably sleeved on the four support rods (6). A lifting structure for lifting and lowering the lower mold (5) for injection molding is arranged on the bottom plate (1); The impurity removal structure comprises two fixed plates (17) installed near the lower position in the feeding chamber (2), a first drawer frame (22) is inserted into the upper fixed plate (17), and a second drawer frame (23) is inserted into the lower fixed plate (17), and both the first drawer frame (22) and the second drawer frame (23) are provided with impurity removal plates (12); A first cylinder (8) is installed at the top of the feeding chamber (2), and a movable plate (9) is connected to the bottom end of the output shaft of the first cylinder (8). The sealing ring on the side of the movable plate (9) is tightly attached to the inner wall of the feeding chamber (2). A baffle (10) is connected to the upper part of the movable plate (9) near the feeding hole (11). Two connecting pipes (13) are connected to the middle of the lower part of the movable plate (9) along its width direction. The two connecting pipes (13) are distributed at positions near the edges of both sides of the lower part of the movable plate (9). Each connecting pipe (13) on the two fixed plates (17) has a sealing ring. A rotating rod (16) is rotatably passed through the position of the tube (13), the top end of each rotating rod (16) is inserted into the corresponding connecting tube (13), an insertion rod (19) is fixedly inserted transversely into the position near the bottom end of the connecting tube (13), a groove (18) is provided on the rotating rod (16), the groove (18) is spirally formed on the rotating rod (16), one end of the insertion rod (19) is movably inserted into the groove (18), the bottom end of each rotating rod (16) is connected to a vertical rod (14), and a plurality of stirring rods (15) are connected to the vertical rod (14); Each of the fixed plates (17) is in an "E" shape, and two impurity removal plates (12) are arranged in each of the first drawer frame (22) and the second drawer frame (23), and the two impurity removal plates (12) in each group are arranged in the two fixed plates (17) respectively; Two pressing tubes (28) are respectively arranged on one side of the first pull-out frame (22) and the second pull-out frame (23) passing through the feeding chamber (2). The two pressing tubes (28) in each group are respectively arranged corresponding to the positions of the two impurity removal plates (12). The first pull-out frame (22) and the second pull-out frame (23) are both provided with slots for the pressing tubes (28) to be inserted into. A pressing block (29) is arranged on one end of the pressing tube (28) passing through the slot. An end of the pressing tube (28) away from the pressing block (29) is connected to the inner end groove wall of the slot. a first spring (31), a clamping rod (30) passing through the pressing tube (28) being connected to the inner side surface of the pressing block (29), the end of the clamping rod (30) away from the pressing block (29) being in a barb shape, an inner frame (26) being arranged below the inner walls of the first drawer frame (22) and the second drawer frame (23), the impurity removal plate (12) being supported on the inner frame (26), a clamping groove (27) being arranged below the impurity removal plate (12) at a position close to the clamping rod (30), and one end of the clamping rod (30) being tightened in the clamping groove (27); A dredging rod (20) is connected to the middle of the lower side of the movable plate (9), and the dredging rod (20) passes through the through hole in the middle of the movable plate (9). The dredging rod (20) extends to the bottom end above the discharge hole (7) and is connected to a dredging block (21), and the dredging block (21) is in the shape of a frustum.

2. The injection molding tool for engineering plastic processing according to claim 1, characterized in that: The first drawable frame (22) and the second drawable frame (23) are arranged with their lateral edges protruding from their longitudinal edges, and two first abutting grooves (24) are provided on the front side of the feeding chamber (2), and the groove walls of the first abutting grooves (24) are provided with through grooves for the longitudinal edges of the first drawable frame (22) and the second drawable frame (23) to pass through, and a second abutting groove (25) is provided on the rear inner wall of the fixing plate (17).

3. The injection molding tool for engineering plastic processing according to claim 1, characterized in that: A mounting plate (32) is fastened with screws at the middle of the upper front of the feeding chamber (2). A second cylinder (33) is mounted on the mounting plate (32) on a side away from the feeding chamber (2). A through rod (36) is fixedly passed through the bottom end of the output shaft of the second cylinder (33). A first guide frame (34) and a second guide frame (35) are sleeved on both ends of the through rod (36). The first guide frame (34) and the second guide frame (35) are both in an "L" shape. The bottom end of the first guide frame (34) is connected to the first drawable frame (22). The second guide frame (35) is connected to the second drawable frame (23) via a connecting rod. The first guide frame (34) and the second guide frame (35) are both provided with two vertical sections and two inclined sections.

4. The injection molding tool for engineering plastic processing according to claim 1, characterized in that: The blocking structure comprises a bottom groove (37) formed on the bottom end surface of the material discharging member (3), a material blocking plate (40) passing through the bottom groove (37) transversely, two ends of the material blocking plate (40) being movably arranged to pass through the material discharging member (3), a material discharging groove (38) being formed on the material blocking plate (40), second springs (41) being connected between the protrusions on both sides of one end of the material blocking plate (40) and the material discharging member (3), and a pull-out strip (39) being connected to the middle of the other end of the material blocking plate (40).

5. The injection molding tool for engineering plastic processing according to claim 1, characterized in that: The lifting structure comprises a third cylinder (42) mounted on the bottom plate (1) and located on both sides of the lower die (5). The bottom ends of the output shafts of the two third cylinders (42) are connected to the lower die (5). An L-shaped rod (43) is connected to the middle of the side of the lower die (5). A pulley (44) is sleeved on the end of the L-shaped rod (43) away from the lower die (5). A vertical plate (45) is arranged on the right side of the top of the bottom plate (1). The vertical plate (45) is fastened to the pull-out strip (39) by screws. A guide plate (46) is arranged on the front of the vertical plate (45). A push edge (47) is arranged on the side surface of the guide plate (46) away from the lower die (5). A reset edge (48) is arranged on the side surface of the lower die (5) close to the lower die (5). The push edge (47) is in a "Z" shape, and the reset edge (48) is in an "L" shape. The upper and lower surfaces of the guide plate (46) are both horizontal.

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