High-speed forming device and process for polyurethane workpiece

Abstract

The polyurethane workpiece high-speed forming device comprises a rack, the upper end of the rack is fixedly connected with a containing box, the containing box is rotationally connected with a mounting disc, the rack is provided with a rotating motor driving the mounting disc to rotate, the upper end of the mounting disc is provided with a forming die, and the mounting disc is provided with a clamping mechanism used for fixing the forming die. The forming die comprises an upper die body, a lower die body and a forming block, a positioning bolt is arranged between the upper die body and the lower die body and used for pushing the upper die body to be attached to the lower die body, a gap between the upper die body and the lower die body forms a cavity, the upper die body is fixedly connected with a feeding pipe communicated with the cavity, and the forming block is located in the cavity and abuts against the lower die body. A forming cavity matched with a workpiece is formed between the outer circle of the forming block and the inner wall of the cavity, a guide ring is fixedly connected to the lower end of the upper die, a gap between the guide ring and the forming block forms a feeding cavity communicated with the forming cavity and the feeding pipe, and an oven used for accelerating curing of the workpiece is further arranged on one side of the rack. The method has the effect of improving the product quality of the polyurethane workpiece.

Description

Technical Field

[0001] This invention relates to the field of polyurethane workpiece molding apparatus, and in particular to a high-speed molding apparatus and process for polyurethane workpieces. Background Technology

[0002] Polyurethane components possess excellent physical properties and chemical stability, and are widely used in the automotive, furniture, and construction industries. Traditional polyurethane component molding processes typically involve first using injection molding to form the polyurethane raw material into a rough shape, followed by final finishing processes such as cutting and polishing to achieve the desired form.

[0003] Related technology can be found in Chinese Patent No. CN215791265U, which discloses a polyurethane molding device, including a base, a fixed frame welded to the upper surface of the base, an electric push rod on the side of the fixed frame, a stirring device fixedly connected to the side of the electric push rod, a mounting frame welded to the top of the stirring device, an inlet and an outlet on the side of the stirring device, and a heating device at the bottom of the stirring device. Compared with traditional stirring methods, the raw materials in this stirring device are more uniform, and the working efficiency is greatly improved. A first mounting plate and a second mounting plate are fixedly installed on the top of the base. A rotary button is provided on the front of the first mounting plate. A movable seat is threadedly connected to the surface of the threaded rod. A lifting plate is fixedly connected to the side of the movable seat. A mold is provided inside the lifting plate, making it more convenient and faster to remove the polyurethane molded in the mold.

[0004] Regarding the aforementioned technologies, the molten polyurethane raw material is prone to generating a large number of air bubbles when injected into the mold. The high viscosity of the polyurethane raw material makes it difficult for the air bubbles to be expelled. When the polyurethane raw material solidifies, the air bubbles can easily affect the quality of the workpiece. Summary of the Invention

[0005] To improve the product quality of polyurethane workpieces, this application provides a high-speed forming apparatus and process for polyurethane workpieces.

[0006] In a first aspect, this application provides a high-speed forming apparatus for polyurethane workpieces, which adopts the following technical solution: A high-speed molding device for polyurethane workpieces includes a frame, a placement box fixedly connected to the upper end of the frame, an installation plate rotatably connected to the placement box, a rotating motor for driving the installation plate to rotate, a molding die at the upper end of the installation plate, and a clamping mechanism for fixing the molding die. The molding die includes an upper die, a lower die, and a molding block. A positioning bolt is provided between the upper die and the lower die for pushing the upper die and the lower die to fit together. The gap between the upper die and the lower die forms a cavity. A feed pipe communicating with the cavity is fixedly connected to the upper die. The molding block is located in the cavity and abuts against the lower die. The outer circle of the molding block and the inner wall of the cavity form a molding cavity adapted to the workpiece. A guide ring is fixedly connected to the lower end of the upper die. The gap between the guide ring and the molding block forms a feed cavity communicating with the molding cavity and the feed pipe. An oven for accelerating workpiece curing is also provided on one side of the frame.

[0007] By adopting the above technical solution, the upper and lower molds clamp and position the forming block under the action of positioning bolts. The mounting plate positions the forming mold through the clamping assembly. The molten raw material is poured into the space between the upper mold and the forming block through the feed pipe. At this time, under the support of the frame, the mounting plate is rotated by the rotary motor. The mounting plate drives the forming mold to rotate in the placement box. When the forming mold rotates, it drives the raw material to rotate. Under the action of centrifugal force, the raw material passes through the feed cavity and enters the forming cavity. The weight of the raw material is greater than the weight of the gas, so the gas in the forming cavity is discharged along the feed cavity. The guide ring helps to reduce the gap between the upper mold and the forming block. When the raw material fills the forming cavity, the guide ring prevents the raw material in the forming cavity from flowing back. The forming mold is removed from the mounting plate and placed in the oven. The oven accelerates the solidification of the raw material in the forming mold, thereby completing the workpiece processing. During the workpiece forming process, the gas in the forming cavity is discharged by the action of centrifugal force, which helps to reduce the probability of the workpiece containing air bubbles after forming and improves the quality of the workpiece product.

[0008] Optionally, the clamping mechanism includes two sets of support blocks, a limiting plate, a positioning rod, and an elastic element. Both support blocks are fixedly connected to the upper end of the mounting plate. The limiting plate is rotatably connected to the upper end of the support blocks in a transverse direction. A positioning block is fixedly connected to the upper end of the support blocks. The limiting plate is located on the side of the positioning block closer to the axis of the mounting plate. The positioning rod is located at one end of the limiting plate and is slidably connected to the limiting plate along its length. The positioning block has a fixing groove corresponding to the positioning rod. The elastic element is located between the positioning rod and the limiting plate and is used to drive the positioning rod to move towards the positioning block.

[0009] By adopting the above technical solution, the limiting plate rotates under the support of the support block, and the forming mold is placed between the two support blocks. The limiting plate is rotated so that it moves above the forming mold. At this time, the positioning rod is directly opposite the positioning block, and the positioning rod is inserted into the fixing groove under the action of the elastic element. The positioning rod and the positioning block cooperate to position the limiting plate, and the limiting plate and the mounting plate cooperate to clamp and position the forming mold, thereby improving the stability of the forming mold when rotating.

[0010] Optionally, the upper end of the mounting plate is provided with two sets of clamping blocks. The clamping blocks are located in the direction of the mounting plate close to the axis of the mounting plate. The mounting plate is slidably connected with a counterweight block that matches the clamping blocks. The weight of the counterweight block is greater than the weight of the clamping blocks. The counterweight block is located on the side of the clamping blocks away from the axis of the mounting plate. A connecting block is provided between the clamping blocks and the counterweight block. The connecting block is slidably connected to the connecting ring and the sliding direction is perpendicular to the moving direction of the counterweight block. Both the connecting block and the counterweight block are hinged with hinge rods. All hinge rods are hinged to the connecting block.

[0011] By adopting the above technical solution, the forming mold is located between two clamping blocks. When the mounting plate rotates, the counterweight tends to move away from the axis of the mounting plate. When the counterweight moves, it drives the hinge rod to rotate under the limiting action of the connecting block, so that the hinge rod pushes the clamping block closer to the forming mold. At this time, the two clamping blocks cooperate to clamp and position the forming mold in the lateral direction.

[0012] Optionally, the forming mold further includes a retaining ring, which is located between the upper mold and the lower mold. The end of the retaining ring away from its own axis is fixedly connected to a connecting edge. The thickness of the connecting edge is less than the thickness of the retaining ring, and the connecting edge has a through hole adapted to the positioning bolt.

[0013] By adopting the above technical solution, the positioning bolt passes through the through hole, so that the upper mold and the lower mold cooperate to clamp the connecting edge, so that the connecting edge fixes the retaining ring. The retaining ring helps to prevent the raw material in the molding cavity from leaking from the gap between the upper mold and the lower mold when rotating.

[0014] Optionally, the upper end of the upper mold is provided with a blocking tube, the blocking tube has a vertical hole adapted to the feed tube, the blocking tube is sleeved on the outside of the blocking tube and slidably connected to the blocking tube, the feed tube has several horizontal holes along the circumference, the horizontal holes are provided with abutting balls, and an elastic element two is provided between the abutting balls and the feed tube. The elastic element two is used to push the abutting balls away from the feed tube and closer to it. The blocking tube has arc-shaped grooves along the circumference adapted to the abutting balls, and all arc-shaped grooves are connected to the vertical holes.

[0015] By adopting the above technical solution, the feed pipe limits the abutment ball through the vertical hole, causing the abutment ball to tend to move away from the axis of the feed pipe under the action of the elastic element two. When the blocking pipe is sleeved on the outside of the feed pipe, the side of the abutment ball away from the feed pipe is located in the arc groove. At this time, the abutment ball restricts the displacement of the blocking pipe along the axial direction, thus reducing the probability of the blocking pipe blocking the raw material in the molding die spilling out during rotation.

[0016] Optionally, a positioning ring is fitted on the outer side of the barrier tube, and several spring pieces are fixedly connected to the lower end of the positioning ring. The spring pieces are deflected from top to bottom in a direction away from the axis of the barrier tube. An extension rod is vertically fixedly connected to the end of each spring piece near the barrier tube. The barrier tube has a clearance hole adapted to the extension rod, and an annular groove communicating with the clearance hole is opened on the outer side of the feed tube.

[0017] By adopting the above technical solution, in the initial state, under the support of the positioning ring, the spring sheet drives the extension rod to a position away from the feed pipe. When it is necessary to move the forming mold, the operator grips all the spring sheets, so that the spring sheets drive the extension rod through the relief hole and insert it into the annular groove. At this time, one end of the extension rod is located in the annular groove and the other end is located in the relief hole, which helps to improve the connection stability between the blocking pipe and the extension pipe, thereby improving the convenience of moving the forming mold.

[0018] Optionally, the oven has several furnace cavities vertically, and each furnace cavity is provided with a support plate. The support plate is slidably connected to the oven horizontally, and the oven is hinged with a door that matches the furnace cavity. An exhaust pipe is fixedly connected to the upper end of the oven. The oven has a channel one that communicates with all the exhaust pipes, and each furnace cavity has a channel two that communicates with channel one.

[0019] By adopting the above technical solution, the molding die and raw material are placed inside the furnace cavity, and the furnace supports the molding die through a support plate. After the molding die is placed, the furnace door is closed, and the furnace cavity is connected to channel one through channel two, and also connected to the exhaust pipe through channel one, so as to facilitate the discharge of gases generated by the raw material during the curing process through the exhaust pipe.

[0020] Optionally, the oven has several transverse grooves communicating with channel 211. A baffle plate is slidably connected to the oven along the length of the transverse groove. The baffle plate has ventilation holes adapted to channel 1. A moving rod is vertically hinged to one end of the baffle plate near the box door, and the other end of the moving rod away from the baffle plate is hinged to the box door.

[0021] By adopting the above technical solution, when the box door is closed, the ventilation hole of the barrier plate is connected to the second channel. When the box door is opened, the box door moves the fixed plate through the moving rod. Under the limiting action of the transverse groove, the barrier plate moves the ventilation hole to intersect with the second channel and blocks the second transverse groove. At this time, the opened drying cavity is not connected to the other drying cavities, which facilitates the curing of multiple molding molds.

[0022] Secondly, this application provides a process for using a high-speed forming apparatus for polyurethane workpieces, comprising the following steps: S1. Place the molding die on the mounting plate and clamp and position it using the clamping mechanism; S2. Pour the molten raw material into the molding die along the feed pipe; S3. By rotating the motor to drive the mounting plate to rotate, the mounting plate drives the molding mold to rotate. At this time, the raw material enters the molding cavity along the feeding cavity under the action of centrifugal force. S4. Move the molding die from the mounting plate into the oven, where the oven bakes the molding die to accelerate the curing of the workpiece.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The upper and lower molds clamp and position the forming block under the action of positioning bolts. The mounting plate positions the forming mold through the clamping assembly. The molten raw material is poured into the space between the upper mold and the forming block through the feed pipe. At this time, under the support of the frame, the mounting plate is rotated by the rotary motor. The mounting plate drives the forming mold to rotate in the placement box. When the forming mold rotates, it drives the raw material to rotate. Under the action of centrifugal force, the raw material passes through the feed cavity and enters the forming cavity. The weight of the raw material is greater than the weight of the gas, so the gas in the forming cavity is discharged along the feed cavity. The guide ring helps to reduce the gap between the upper mold and the forming block. When the raw material fills the forming cavity, the guide ring prevents the raw material in the forming cavity from flowing back. The forming mold is removed from the mounting plate and placed in the oven. The oven accelerates the solidification of the raw material in the forming mold, thereby completing the workpiece processing. During the workpiece forming process, the gas in the forming cavity is discharged by the action of centrifugal force, which helps to reduce the probability of the workpiece containing air bubbles after forming and improves the quality of the workpiece product. 2. The limiting plate rotates under the support of the support blocks, placing the forming mold between the two support blocks. The limiting plate is then rotated to move above the forming mold. At this point, the positioning rod is aligned with the positioning block, allowing the positioning rod to insert into the fixing groove under the action of the elastic element. This allows the positioning rod and the positioning block to cooperate in positioning the limiting plate, and the limiting plate and the mounting plate to cooperate in clamping and positioning the forming mold, thus improving the stability of the forming mold during rotation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the embodiment.

[0025] Figure 2 This is a schematic diagram designed to highlight the overall structure of the installation disk.

[0026] Figure 3 This is a schematic diagram designed to highlight the internal structure of the molding die. Figure 4This is a schematic diagram designed to highlight the internal structure of the oven. Figure 5 This is a schematic diagram designed to highlight the installation structure of the cabinet door.

[0027] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Rotating motor; 12. Placement box; 2. Mounting plate; 211. Support block; 212. Limiting plate; 213. Positioning rod; 214. Elastic element one; 215. Positioning block; 216. Fixing groove; 221. Clamping block; 222. Counterweight block; 223. Connecting block; 224. Hinge rod; 3. Forming mold; 31. Upper mold; 311. Guide ring; 32. Lower mold; 33. Forming block; 34. Positioning bolt; 35. Feed pipe; 351. Horizontal hole; 3 52. Abutting ball; 353. Elastic component two; 354. Annular groove; 36. Retaining ring; 361. Connecting edge; 362. Through hole; 37. Barrier tube; 371. Vertical hole; 372. Arc groove; 373. Clearance hole; 38. Positioning ring; 381. Spring piece; 382. Extension rod; 4. Oven; 41. Oven cavity; 42. Bearing plate; 43. Box door; 44. Exhaust pipe; 45. Channel one; 46. Channel two; 47. Horizontal groove; 48. Barrier plate; 481. Horizontal hole; 482. Connecting rod. Detailed Implementation

[0028] The present application will be further described in detail below with reference to all the accompanying drawings.

[0029] This application discloses a high-speed forming apparatus for polyurethane workpieces.

[0030] Example: Reference Figure 1 and Figure 2 A high-speed forming device for polyurethane workpieces includes a frame 1 and multiple forming molds 3. The upper end of the frame 1 is provided with a placement box 12, and a baking oven 4 is provided on one side of the frame 1. The placement box 12 is provided with a mounting plate 2, which is rotatably connected to the placement box 12. The lower end of the placement box 12 is fixed with a rotating motor 13, which is used to drive the mounting plate 2 to rotate.

[0031] Reference Figure 2 and Figure 3 The forming mold 3 includes an upper mold 31, a lower mold 32, a forming block 33, and multiple positioning bolts 34. The forming block 33 is located between the upper mold 31 and the lower mold 32, and the positioning bolts 34 pass through the upper mold 31 and are threadedly connected to the lower mold 32. Cavities are provided on the sides of the upper mold 31 and the lower mold 32 that are close to each other. The forming block 33 is located within these cavities. The upper mold 31 and the lower mold 32 cooperate to clamp and position the forming block 33. The inner wall of the cavity and the outer circle of the forming block 33 fit together to form a forming cavity adapted to the workpiece.

[0032] Reference Figure 2 and Figure 3The upper mold 31 is fixedly connected to a feed pipe 35 that communicates with the cavity. The operator pours the molten raw material into the feed pipe 35, so that the raw material enters between the molding block 33 and the upper mold 31. A guide ring 311 is fixedly connected to the lower end of the upper mold 31. The lower end of the guide ring 311 has an inclined surface. The inclined surface is set from top to bottom in the direction of the center of the guide ring 311 outward. There is a narrow gap between the inclined surface and the molding block 33. This gap is set as the feed cavity, which connects the molding cavity and the feed pipe 35.

[0033] Reference Figure 2 and Figure 3 A retaining ring 36 is provided between the upper mold 31 and the lower mold 32. A connecting edge 361 is fixed to the outer circumference of the retaining ring 36. The connecting edge 361 is clamped between the upper mold 31 and the lower mold 32 and abuts against both. The connecting edge 361 has a vertically formed relief hole 373 that matches the positioning bolt 34. The positioning bolt 34 passes through the relief hole 373, and the upper mold 31 and the lower mold 32 cooperate to clamp and position the connecting edge 361. The thickness of the retaining ring 36 is greater than the thickness of the connecting edge 361, thereby blocking the gap between the upper mold 31 and the lower mold 32.

[0034] Reference Figure 2 and Figure 3 The upper end of the mounting plate 2 is provided with two sets of clamping mechanisms, which are symmetrically arranged about the axis of the mounting plate 2. The clamping mechanism includes a support block 211, a limiting plate 212, a positioning rod 213, and an elastic element 214. The support block 211 is fixedly connected to the mounting plate 2. When the mounting plate 2 rotates, it drives the support block 211 to move. The limiting plate 212 is rotatably connected to the upper end of the support block 211 in a transverse direction, and one end of the limiting plate 212 extends away from the support block 211.

[0035] Reference Figure 2 and Figure 3 A positioning block 215 is fixed to the end of the support block 211 away from the mounting plate 2. A fixing groove 216 is opened at the end of the positioning block 215 near the limiting plate 212. The positioning rod 213 is located at the end of the limiting plate 212 near the positioning block 215, and the positioning rod 213 is slidably connected to the limiting plate 212 along its length. When the limiting plate 212 rotates, it drives the positioning rod 213 to move. An elastic element 214 is located between the limiting plate 212 and the positioning rod 213. The elastic element 214 is a spring, one end of which is fixedly connected to the positioning rod 213, and the other end is fixedly connected to the limiting plate 212.

[0036] Reference Figure 2 and Figure 3The molding mold 3 is placed between two support blocks 211. The limiting plate 212 is rotated so that it is directly above the upper mold 31. At this time, the positioning rod 213 is directly opposite the fixing groove 216, and the elastic element 214 is in a compressed state. Under the action of the elastic element 214, the positioning rod 213 is inserted into the fixing groove 216. At this time, the positioning block 215 cooperates with the positioning rod 213 to limit the positioning plate 212. The two limiting plates 212 cooperate with the mounting plate 2 to clamp and limit the molding mold 3, so that the molding mold 3 rotates when the mounting plate 2 rotates. Furthermore, an elastic pad is fixed to the lower end of the limiting plate 212. The elastic pad is made of rubber and has deformable properties. The elastic pad helps to improve the clamping stability of the limiting plate 212 on the mounting plate 2.

[0037] Reference Figure 2 and Figure 3 The mounting plate 2 is provided with two sets of clamping blocks 221. The two clamping blocks 221 are symmetrically arranged with the line connecting the two support blocks 211 as the center. The clamping blocks 221 are slidably connected to the mounting plate 2 along the diameter of the mounting plate 2. The mounting plate 2 is provided with a counterweight block 222 corresponding to the clamping blocks 221. The counterweight block 222 is located on the side of the clamping blocks 221 away from the axis of the mounting plate 2. The counterweight block 222 is also slidably connected to the mounting plate 2, and the moving direction of the counterweight block 222 is the same as the moving direction of the clamping blocks 221. A connecting block 223 is provided between the counterweight 222 and the clamping block 221. The connecting block 223 is hinged to two hinge rods 224. One hinge rod 224 is hinged to the counterweight 222, and the other hinge rod 224 is hinged to the clamping block 221. The connecting block 223 is slidably connected to the mounting plate 2. The mounting plate 2 has a groove for guiding the connecting block 223. The length direction of the groove is perpendicular to the moving direction of the counterweight 222.

[0038] Reference Figure 2 and Figure 3 A push spring is provided between the counterweight 222 and the clamping block 221. One end of the push spring is fixedly connected to the counterweight 222, and the other end is fixedly connected to the clamping block 221. The push spring is used to move the clamping block 221 away from the counterweight 222. The forming mold 3 is located between the two sets of clamping blocks 221. The two clamping blocks 221 cooperate to clamp and position the forming mold 3, thereby improving the clamping stability between the forming mold 3 and the mounting plate 2.

[0039] Reference Figure 2 and Figure 3The upper end of the upper mold 31 is provided with a blocking tube 37. The blocking tube 37 has a vertical hole 371 adapted to the feed tube 35 along the axial direction. The feed tube 35 is located in the vertical hole 371 and fits against the inner wall of the blocking tube 37. The outer circle of the feed tube 35 has a plurality of evenly arranged horizontal holes 481351 along the circumference. All horizontal holes 481351 are provided with abutment balls 352. An elastic element 353 is provided between the abutment ball 352 and the feed tube 35. The elastic element 353 is a spring. One end of the spring is fixedly connected to the abutment ball 352 and the other end is fixedly connected to the feed tube 35. The elastic element 353 is in a compressed state, applying a thrust to the abutment ball 352 away from the axial direction of the feed tube 35.

[0040] Reference Figure 2 and Figure 3 The blocking tube 37 has an arc-shaped groove 372 communicating with the arc-shaped hole along its circumference. The arc-shaped groove 372 is adapted to the abutment ball 352. When the blocking tube 37 is sleeved on the outside of the feed tube 35, the abutment ball 352 enters the arc-shaped groove 372 under the action of the elastic element 353. The blocking tube 37 and the feed tube 35 are detachably connected, and the feed tube 35 limits the vertical displacement of the blocking tube 37 by the abutment ball 352, which helps to improve the connection stability between the blocking tube 37 and the feed tube 35.

[0041] Reference Figure 2 and Figure 3 Placement box 12 (reference) Figure 1 The upper end is hinged with a lid. When the lid is closed, the mounting plate 2 is rotated by the rotating motor 11. With the cooperation of the limiting plate 212 and the clamping block 221, the rotation of the mounting plate 2 drives the forming mold 3 to rotate. When the forming mold 3 rotates, it causes the raw material between the forming block 33 and the upper mold 31 to move. Under the action of centrifugal force, the raw material enters the forming cavity through the feeding chamber and squeezes out the gas in the forming cavity. After the raw material fills the forming cavity, the guide ring 311 prevents the backflow of the raw material, and the retaining ring 36 prevents the raw material from leaking from the gap between the upper mold 31 and the lower mold 32. When the forming mold 3 starts to rotate, the retaining pipe 37 helps to reduce the probability of the raw material in the forming mold 3 being thrown out from the feeding pipe 35, thereby helping to keep the inside of the placement box 12 clean.

[0042] Reference Figure 2 and Figure 3The counterweight 222 has a greater mass than the clamping block 221. When the mounting plate 2 rotates, the counterweight 222 tends to move away from the axis of the mounting plate 2. At this time, the mounting plate 2 drives the connecting block 223 to move through the corresponding hinge rod 224, so that the connecting block 223 pushes the clamping block 221 closer to the molding mold 3 through another set of hinge rods 224, which helps to improve the clamping stability of the clamping block 221 on the molding mold 3. After the raw material fills the molding cavity, the box cover is opened, the limiting plate 212 is rotated to release the clamping of the limiting plate 212 on the molding mold 3, and the molding mold 3 is removed from the placement box 12.

[0043] Reference Figure 2 and Figure 3 A positioning ring 38 is provided on the outer side of the barrier tube 37. Multiple spring pieces 381 are fixed to the lower end of the positioning ring 38. The spring pieces 381 are evenly arranged around the circumference of the positioning ring 38, and all spring pieces 381 are inclined from top to bottom in a direction away from the axis of the barrier tube 37. The spring pieces 381 are elastic and are made of stainless steel. An extension rod 382 is vertically fixed to the lower end of the spring piece 381. The extension rod 382 is located at the end of the spring piece 381 closest to the barrier tube 37.

[0044] Reference Figure 2 and Figure 3 The blocking tube 37 has a clearance hole 373 that matches the extension rod 382. The feed tube 35 has an annular groove 354 that is directly opposite the clearance hole 373 along the circumferential direction. When moving the forming mold 3, the operator holds the spring piece 381, so that the spring piece 381 drives the extension rod 382 through the clearance hole 373 and into the annular groove 354. At this time, the forming mold 3 is lifted by the blocking tube 37, which helps to improve the convenience of moving the forming mold 3.

[0045] Reference Figure 1 and Figure 4 The oven 4 has multiple vertically oriented chambers 41, with a support plate 42 slidably connected to each chamber 41. The oven 4 is also hinged with a door 43 that fits the chamber 41. After opening any door 43, the support plate 42 is removed from the chamber 41, the molding mold 3 is placed on the support plate 42, the barrier tube 37 is removed, and the support plate 42 and molding mold 3 are pushed into the chamber 41 together. The door 43 is then closed, allowing the oven 4 to accelerate the curing of the polyurethane material in the molding mold 3.

[0046] Reference Figure 4 and Figure 5 An exhaust pipe 44 is fixed to the upper end of the oven 4, and the oven 4 has a channel 45 that communicates with the exhaust pipe 44. All oven chambers 41 have a second channel 46 opened laterally, and all second channels 46 communicate with the first channel 45. The gas generated during the solidification process of the raw material in the molding mold 3 inside the oven chamber 41 enters the first channel 45 along the second channel 46 and is discharged along the exhaust pipe 44.

[0047] Reference Figure 4 and Figure 5 The oven 4 has a transverse groove 47 that communicates with channel 2 46. A baffle plate 48 is installed within the groove 47, slidingly connected to the oven 4 along the length of the groove 47, and has a vent hole communicating with channel 2 46. A moving rod is vertically hinged to one end of the baffle plate 48 near the door 43, and the moving rod and one end of the baffle plate 48 are hinged to the door 43. When the door 43 is closed, the vent hole is directly opposite channel 2 46, and the oven cavity 41 is connected to the exhaust pipe 44. When the door 43 is opened, the door 43 moves the fixed plate via the moving rod, causing the vent hole to intersect with channel 2 46, thus cutting off channel 2 46 with the baffle plate 48. When the molding mold 3 is picked up or placed, the corresponding oven cavity 41 is not connected to the other oven cavities 41, thus preventing gas leakage from the other oven cavities 41 and facilitating curing of the molding mold 3 through any oven cavity 41 independently.

[0048] This application also discloses a process for a high-speed forming apparatus for polyurethane workpieces, including the following steps: S1. Place the molding mold 3 on the mounting plate 2 and clamp and position the molding mold 3 using the clamping mechanism; S2. Pour the molten raw material into the molding mold 3 along the feed pipe 35; S3. By rotating the motor 13, the mounting plate 2 is driven to rotate, which in turn drives the molding mold 3 to rotate. At this time, the raw material enters the molding cavity along the feeding cavity under the action of centrifugal force. S4. Move the molding mold 3 from the mounting plate 2 into the oven 4. The oven 4 bakes the molding mold 3 to accelerate the curing of the workpiece.

[0049] The implementation principle of the high-speed molding device and process for polyurethane workpieces in this application embodiment is as follows: The molding mold 3 is placed above the mounting plate 2, and the limiting plate 212 is rotated so that the limiting plate 212 and the mounting plate 2 cooperate to clamp and position the molding mold 3. At this time, the two clamping blocks 221 cooperate to clamp the molding mold 3 laterally, so that the molding mold 3 and the mounting plate 2 remain coaxial. The raw material is poured in through the feed pipe 35, so that the molten polyurethane raw material enters between the upper mold 31 and the molding block 33 through the feed pipe 35. The mounting plate 2 is driven to rotate by the rotary motor, so that the mounting plate 2 drives the molding mold 3 to rotate. When the molding mold 3 rotates, the raw material enters the molding cavity along the feed cavity under the action of centrifugal force, and the gas in the molding cavity is discharged. At this time, the guide ring 311 prevents the raw material in the molding cavity from flowing back. After centrifugal processing is completed, the molding mold 3 is placed in the oven 4. The oven 4 accelerates the solidification of the workpiece, thereby completing the workpiece processing. This helps to reduce the probability of the polyurethane raw material in the molding cavity containing air bubbles and improves the quality of the workpiece product.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-speed forming device for polyurethane workpieces, comprising a frame (1), characterized in that: The upper end of the frame (1) is fixedly connected to a placement box (12), and the placement box (12) is rotatably connected to a mounting plate (2). The frame (1) is equipped with a rotating motor (13) that drives the mounting plate (2) to rotate. The upper end of the mounting plate (2) is equipped with a forming mold (3), and the mounting plate (2) is equipped with a clamping mechanism for fixing the forming mold (3). The forming mold (3) includes an upper mold (31), a lower mold (32), and a forming block (33). A positioning bolt (34) is provided between the upper mold (31) and the lower mold (32). The positioning bolt (34) is used to push the upper mold (31) and the lower mold (32) together. The upper mold (31) and the lower mold (32) are fitted together, and the gap between them forms a cavity. The upper mold (31) is fixedly connected to a feed pipe (35) that communicates with the cavity. The forming block (33) is located in the cavity and abuts against the lower mold (32). The outer circle of the forming block (33) and the inner wall of the cavity form a forming cavity that matches the workpiece. The lower end of the upper mold (31) is fixedly connected to a guide ring (311). The gap between the guide ring (311) and the forming block (33) forms a feed cavity that communicates with the forming cavity and the feed pipe (35). An oven (4) for accelerating the curing of the workpiece is also provided on one side of the frame (1).

2. The high-speed forming device for polyurethane workpieces according to claim 1, characterized in that: The clamping mechanism includes two sets of support blocks (211), a limiting plate (212), a positioning rod (213), and an elastic element (214). Both support blocks (211) are fixedly connected to the upper end of the mounting plate (2). The limiting plate (212) is rotatably connected to the upper end of the support blocks (211) in the transverse direction. A positioning block (215) is fixedly connected to the upper end of the support blocks (211). The limiting plate (212) is located on the side of the positioning block (215) close to the axis of the mounting plate (2). The positioning rod (213) is located at one end of the limiting plate (212) and is slidably connected to the limiting plate (212) along the length direction. The positioning block (215) has a fixing groove (216) corresponding to the positioning rod (213). The elastic element is located between the positioning rod (213) and the limiting plate and is used to drive the positioning rod (213) to move closer to the positioning block (215).

3. The high-speed forming device for polyurethane workpieces according to claim 1, characterized in that: The upper end of the mounting plate (2) is provided with two sets of clamping blocks (221). The clamping blocks (221) are located on the mounting plate (2) near the axis of the mounting plate (2). The mounting plate (2) is slidably connected with a counterweight block (222) that is compatible with the clamping blocks (221). The weight of the counterweight block (222) is greater than the weight of the clamping blocks (221). The counterweight block (222) is located on the side of the clamping blocks (221) away from the axis of the mounting plate (2). A connecting block (223) is provided between the clamping blocks (221) and the counterweight block (222). The connecting block (223) is slidably connected to the connecting ring and the sliding direction is perpendicular to the moving direction of the counterweight block (222). The connecting block (223) and the counterweight block (222) are both hinged with hinge rods (224). All hinge rods (224) are hinged to the connecting block (223).

4. The high-speed forming device for polyurethane workpieces according to claim 1, characterized in that: The forming mold (3) also includes a retaining ring (36), which is located between the upper mold (31) and the lower mold (32). The end of the retaining ring (36) away from its own axis is fixedly connected to a connecting edge (361). The thickness of the connecting edge (361) is less than the thickness of the retaining ring (36), and the connecting edge (361) has a through hole (362) that is compatible with the positioning bolt (34).

5. The high-speed forming device for polyurethane workpieces according to claim 1, characterized in that: The upper end of the upper mold (31) is provided with a blocking tube (37). The blocking tube (37) has a vertical hole (371) adapted to the feed tube (35). The blocking tube (37) is sleeved on the outside of the blocking tube (37) and slidably connected to the blocking tube (37). The feed tube (35) has several horizontal holes (481)(351) in the circumferential direction. The horizontal holes (481)(351) are provided with abutting balls (352). An elastic element (353) is provided between the abutting ball (352) and the feed tube (35). The elastic element (353) is used to push the abutting ball (352) away from the feed tube (35) and closer to it. The blocking tube (37) has an arc-shaped groove (372) adapted to the abutting ball (352) in the circumferential direction. All arc-shaped grooves (372) are connected to the vertical hole (371).

6. The high-speed forming device for polyurethane workpieces according to claim 5, characterized in that: The outer side of the blocking tube (37) is fitted with a positioning ring (38), and a number of spring pieces (381) are fixedly connected to the lower end of the positioning ring (38). The spring pieces (381) are deflected from top to bottom in a direction away from the axis of the blocking tube (37). An extension rod (382) is vertically fixedly connected to the end of each spring piece (381) near the blocking tube (37). The blocking tube (37) is provided with a relief hole (373) that matches the extension rod (382). An annular groove (354) that communicates with the relief hole (373) is provided on the outer side of the feed tube (35).

7. The high-speed forming device for polyurethane workpieces according to claim 1, characterized in that: The oven (4) has several furnace chambers (41) vertically, and each furnace chamber (41) is provided with a support plate (42). The support plate (42) is slidably connected to the oven (4) horizontally. The oven (4) is hinged with a door (43) that is compatible with the furnace chamber (41). An exhaust pipe (44) is fixedly connected to the upper end of the oven (4). The oven (4) has a channel (45) that communicates with all the exhaust pipes (44). Each furnace chamber (41) has a channel (46) that communicates with the channel (45).

8. The high-speed forming device for polyurethane workpieces according to claim 7, characterized in that: The oven (4) has several transverse grooves (47) that are connected one-to-one with the second channel (46). The oven (4) is slidably connected with a baffle plate (48) along the length of the transverse groove (47). The baffle plate (48) has ventilation holes that are adapted to the first channel (45). A moving rod is vertically hinged to one end of the baffle plate (48) near the box door (43). The end of the moving rod away from the baffle plate (48) is hinged to the box door (43).

9. The process applied to the high-speed forming apparatus for polyurethane workpieces as described in claims 1-8, characterized in that, Includes the following steps: S1. Place the molding die (3) on the mounting plate (2) and clamp and position the molding die (3) using the clamping mechanism; S2. Pour the molten raw material into the molding die (3) along the feed pipe (35); S3. By rotating the motor (13) to drive the mounting plate (2) to rotate, the mounting plate (2) drives the molding mold (3) to rotate. At this time, the raw material enters the molding cavity along the feeding cavity under the action of centrifugal force. S4. Move the molding mold (3) from the mounting plate (2) into the oven (4). The oven (4) bakes the molding mold (3) to accelerate the curing of the workpiece.

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