Forming device for polyurethane pressing plate production

Abstract

The utility model relates to the technical field of polyurethane forming, in particular to a forming device for producing a polyurethane pressing plate, which solves the problem that the existing forming device for producing the polyurethane pressing plate is low in efficiency and comprises a base plate, and an annular turntable is rotatably mounted at the top of the base plate; a plurality of connecting plates are annularly and fixedly mounted on the rotating disc around the central axis of the rotating disc, and a mold for forming polyurethane fluid is fixedly mounted at one end, far away from the rotating disc, of each connecting plate; an annular rail is fixedly arranged outside the base plate, rolling assemblies capable of sliding on the top of the annular rail to drive the movable mold to ascend and descend are slidably installed on the fixed mold, and pushing rods capable of synchronously ascending and descending along with the movable mold and pushing the formed polyurethane pressing plate upwards when the movable mold ascends are fixedly installed on the rolling assemblies. The utility model discloses production efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane molding technology, specifically to a molding device for producing polyurethane press plates. Background Technology

[0002] Automotive door sill plates, also known as door trim or door sill strips, are plastic or metal panels installed at the bottom of car doors. They not only serve a decorative purpose but also effectively protect the doors from wear and scratches, prevent water and dirt from entering the bottom of the door, and reduce water accumulation and corrosion inside the door. There are various types of automotive door sill plates, commonly including plastic, metal, and carbon fiber plates.

[0003] With the increasing popularity of new energy vehicles, lightweighting has become a research hotspot. Polyurethane (PU) and polyurethane-based materials, with their advantages of lightweighting and heat insulation, have become widely used automotive materials. Therefore, some manufacturers have begun research and production of polyurethane automotive body panels (referred to as polyurethane body panels).

[0004] The current main method for producing polyurethane pressed sheets is injection molding. The molding equipment used is injection molding machinery. During operation, the injection unit injects polyurethane fluid into the mold. After a short period of settling, the moving mold moves, separating from the fixed mold, and the molded polyurethane pressed sheet is removed. It can be seen that existing injection molding equipment cannot produce continuously; it can only produce one polyurethane pressed sheet at a time, resulting in low efficiency.

[0005] Therefore, existing molding equipment for polyurethane press production suffers from low efficiency. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a molding device for producing polyurethane press plates with higher efficiency.

[0007] To solve the above-mentioned technical problems, the present invention provides a molding device for producing polyurethane press plates, comprising a base plate, an annular turntable rotatably mounted on the top of the base plate, and a first driving component for driving the turntable to rotate above the base plate; multiple connecting plates are fixedly mounted circumferentially around the central axis of the turntable, and a mold for molding polyurethane fluid is fixedly mounted on the end of each connecting plate away from the turntable; the mold includes a fixed mold fixedly connected to the connecting plates and a movable mold that matches the fixed mold and can be raised and lowered; a sealed molding cavity is formed between the fixed mold and the movable mold; an annular track is fixedly mounted outside the base plate, the top of the annular track has a curved structure, the curved structure includes a raised section and a smooth section, and a rolling component is slidably mounted on the fixed mold that can drive the movable mold to rise and fall by sliding on the top of the annular track; a push rod is fixedly mounted on the rolling component that can rise and fall synchronously with the movable mold and can push the molded polyurethane press plate upward when the movable mold rises.

[0008] As a further improvement of this utility model: a ring-shaped support is fixedly installed on the top of the substrate, the support including an outer ring cylinder and an inner ring cylinder vertically installed on the top of the substrate; a cylindrical plug-in is fixedly installed on the bottom of the turntable; an annular slot for rotating the plug-in is provided between the outer ring cylinder and the inner ring cylinder; a first drive assembly is installed on the support.

[0009] Preferably, the first drive assembly includes an internal gear ring fixedly mounted on the wall of the central hole of the turntable; the first drive assembly also includes a motor fixedly mounted in the central hole of the support member, and a gear meshing with the internal gear ring is fixedly mounted on the output shaft of the motor.

[0010] As a further improvement of this utility model: the rolling assembly includes at least two straight rods fixedly installed at the bottom of the moving mold, at least two straight rods passing through the fixed mold, and a fixed plate fixedly installed at the end of at least two straight rods away from the moving mold, and a return spring is sleeved on the part of at least two straight rods located between the fixed mold and the fixed plate, the top of the return spring is fixedly connected to the bottom of the fixed mold, and the bottom of the return spring is fixedly connected to the top of the fixed plate; a roller component that can slide on the top of the annular track is fixedly connected to the bottom of the fixed plate; and a push rod is vertically installed on the top of the fixed plate.

[0011] As a further improvement of this utility model: an injection assembly for injecting polyurethane fluid into a given mold is installed on the annular track, which is capable of sliding radially along the annular track; the injection assembly is located near the right end of the protruding section; a second driving assembly for driving the injection assembly to slide is also installed on the annular track.

[0012] Preferably, the injection assembly includes a first upright plate, on which an injection tube for injecting polyurethane fluid into the mold is fixedly mounted; the first upright plate is vertically fixedly mounted on top of a second slider that can slide radially along an annular track, and a second slide rail for sliding the second slider is fixedly mounted on the annular track.

[0013] Preferably, a feeding component is slidably mounted on the substrate, which is capable of sliding radially along an annular track synchronously with the injection component under the drive of the second driving component, and the feeding component is located near the left end of the protrusion section.

[0014] Preferably, the feeding assembly includes a second vertical plate, on the side of the second vertical plate near the mold, a second plate assembly for clamping and fixing the fixed mold is fixedly installed; the second plate assembly includes a first straight plate and a second straight plate parallel to each other, a feeding track is fixedly installed on the side of the first straight plate away from the mold; a feeding push rod is provided on the side of the second straight plate away from the mold, which is slidable in a direction perpendicular to the second straight plate, for pushing the molded polyurethane pressure plate that has been pushed away from the fixed mold into the feeding track; the second plate assembly forms an extension section on the side of the second vertical plate away from the mold, and a feeding push rod is installed between the extension sections, which is slidable in a direction perpendicular to the second straight plate, for pushing the molded polyurethane pressure plate that has been pushed away from the fixed mold into the feeding track; A movable rod slides perpendicular to the second plate group. The movable rod is perpendicular to the second plate group. The end of the movable rod near the second straight plate is fixedly connected to the feeding push rod through an L-shaped plate. The second vertical plate is fixedly installed on the top of the third slider that can slide radially along the annular track. A third slide rail for the third slider to slide is fixedly installed on the annular track. An L-shaped bracket is fixedly installed on the third slide rail. A limit block is fixedly installed on the top of the movable rod. The top of the L-shaped bracket has a bent limit groove for limiting the movement trajectory of the limit block. The bent limit groove has a trapezoidal structure without a bottom edge.

[0015] Preferably, the second driving assembly is located between the injection assembly and the feeding assembly; the second driving assembly includes a first slider that can slide radially along an annular track, a first slide rail for sliding the first slider is fixedly installed at the edge of the annular track, and a telescopic member that can drive the first slider to slide is fixedly installed below the substrate or the annular track; the tops of the second slider and the third slider are respectively equipped with contact blocks, and the top of the first slider is equipped with a bent rod that can drive the second slider and the third slider to slide synchronously through the contact blocks, and the two ends of the bent rod are respectively provided with contact holes for driving the contact blocks to slide and allowing the contact blocks to slide in the bent rod.

[0016] The beneficial effects of this utility model are as follows: The molding device for polyurethane press plate production provided by this utility model has high production efficiency. The device has a turntable on which multiple molds are mounted. Through the cooperation of a rolling component and a ring track, the molds can automatically open and close as the turntable rotates. When the turntable rotates, the molds open at the raised section and close at the smooth section. Therefore, when the turntable rotates, polyurethane fluid can be continuously injected into the open molds near the raised section, achieving a relatively continuous injection of polyurethane fluid. After the polyurethane fluid is injected, the mold is gradually formed by compression in the smooth section. When the turntable rotates back to the raised section, the mold automatically opens, and the push rod pushes out the formed polyurethane press plate. At this time, the formed polyurethane press plate can be removed, and polyurethane fluid can be injected into the mold again. It can be seen that the entire production process effectively utilizes the molding time to inject polyurethane fluid into other molds or remove the formed polyurethane press plates, greatly improving production efficiency. One device can achieve the production efficiency that would otherwise require several existing injection molding machines, greatly saving costs and time, making it very suitable for small businesses. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is an assembly drawing of the substrate and the base in this utility model;

[0021] Figure 5 This is an assembly drawing of the substrate and support components in this utility model;

[0022] Figure 6 This is an assembly drawing of the turntable and the first driving component in this utility model;

[0023] Figure 7 This is an assembly view of the turntable and the first driving component from another angle in this utility model.

[0024] Figure 8 This is a schematic diagram of the overall structure of the mold and the rolling assembly in this utility model;

[0025] Figure 9 This is a schematic diagram of the overall structure of the mold and the rolling assembly of the hidden moving mold in this utility model;

[0026] Figure 10 This is a schematic diagram of the overall structure of the mold and rolling assembly from another angle in this utility model;

[0027] Figure 11 This is a schematic diagram of the overall structure of the substrate, arc-shaped boss, injection assembly, second drive assembly and unloading assembly in this utility model.

[0028] Figure 12 This is a schematic diagram of the overall structure of the substrate, arc-shaped boss, injection assembly, second drive assembly and unloading assembly from another angle in this utility model.

[0029] Figure 13 This is a partial structural diagram of the feeding assembly in this utility model;

[0030] Figure 14 This is a schematic diagram showing the positional relationship between the feeding assembly, the bending rod, and the first slider in this utility model.

[0031] Figure 15 This is an assembly drawing of the feeding push rod, L-shaped plate, movable rod and limiting block in this utility model;

[0032] The names of the components corresponding to the markings in the above figures are as follows: 101, base plate; 102, support member; 1021, outer ring cylinder; 1022, inner ring cylinder; 1023, annular slot; 103, arc-shaped boss;

[0033] 2. Turntable; 201. Connector;

[0034] 3. First drive assembly; 301. Internal gear ring; 302. Motor; 303. Gear;

[0035] 4. Connecting plate;

[0036] 5. Mold; 501. Fixed mold; 502. Moving mold;

[0037] 6. Rolling assembly; 601. Straight rod; 602. Fixing plate; 603. Return spring; 604. Roller assembly;

[0038] 7. Injection assembly; 701. First vertical plate; 702. Injection tube; 703. First plate assembly; 704. Second slider; 705. Second slide rail;

[0039] 8. Second drive assembly; 801. First slider; 802. First slide rail; 803. Telescopic component; 804. Bending rod;

[0040] 9. Feeding assembly; 901. Second vertical plate; 902. Second plate assembly; 9021. First vertical plate; 9022. Second vertical plate; 903. Feeding track; 904. Feeding push rod; 905. Movable rod; 906. L-shaped plate; 907. Third slider; 908. Third slide rail; 909. L-shaped bracket; 9010. Limiting block;

[0041] 10. Push lever. Detailed Implementation

[0042] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0043] Definitions of relevant terms used in this utility model:

[0044] (1) In this utility model, directional terms such as "up", "down", "left", "right", "front", "back", "top", and "bottom" are all used in the form of... Figure 3 The defined direction serves as the reference.

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the molding device for producing polyurethane press plates provided by this utility model includes a horizontally arranged base plate 101, on which a base for support is fixedly arranged; an annular turntable 2 is rotatably mounted on the top of the base plate 101, the base plate 101 has a circular annular plate structure, and the central axis of the base plate 101 and the central axis of the turntable 2 are located on the same vertical line; an annular track is fixedly arranged outside the base plate 101, the top of the annular track has a curved surface structure, the curved surface structure includes a raised section and a smooth section. In the figure, the base plate 101 and the annular track are integrally formed, the top of the base plate 101 is equivalent to the smooth section of the annular track, and an arc-shaped boss 103 fixedly arranged on the top of the base plate 101 is equivalent to the raised section of the annular track. When the rolling component 6 rolls on the base plate 101, it keeps the mold 5 closed; when it rolls on the arc-shaped boss 103, it keeps the mold 5 open and can also push the formed polyurethane press plate upward and away from the molding cavity. A ring-shaped support member 102 is fixedly installed on the top of the substrate 101. The support member 102 includes an outer ring cylinder 1021 and an inner ring cylinder 1022 that are vertically installed on the top of the substrate 101. The central axes of the substrate 101, the outer ring cylinder 1021 and the inner ring cylinder 1022 are all located on the same vertical line. A cylindrical plug-in member 201 is fixedly installed on the bottom of the turntable 2. An annular slot 1023 for rotating and plugging the plug-in member 201 is provided between the outer ring cylinder 1021 and the inner ring cylinder 1022.

[0046] like Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, a first drive assembly 3 for driving the turntable 2 to rotate is disposed above the substrate 101; the first drive assembly 3 is mounted on the support member 102. The first drive assembly 3 includes an internal gear ring 301 fixedly mounted on the wall of the central hole of the turntable 2; the first drive assembly 3 also includes a motor 302 fixedly mounted in the central hole of the support member 102, and a gear 303 that meshes with the internal gear ring 301 is fixedly mounted on the output shaft of the motor 302.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 , Figure 10As shown, multiple connecting plates 4 are fixedly installed circumferentially around the central axis of the turntable 2. Each connecting plate 4 has a mold 5 for molding polyurethane fluid fixedly installed at the end away from the turntable 2. The mold 5 includes a fixed mold 501 fixedly connected to the connecting plate 4 and a movable mold 502 that matches the fixed mold 501 and can be raised and lowered. The fixed mold 501 is cuboid in shape and has a groove for molding on the top. The movable mold 502 includes a rectangular plate with the same area as the top of the cuboid of the fixed mold 501 and a pressure block fixedly installed at the bottom of the rectangular plate that can be inserted into the groove for pressing the polyurethane fluid. The pressure block can block the injection hole on the fixed mold 501. A sealed molding cavity is formed between the fixed mold 501 and the movable mold 502. Rolling components 6 are slidably mounted on the fixed mold 501, which can drive the moving mold 502 to move up and down synchronously by sliding on the top of the annular track. The rolling components 6 include at least two straight rods 601 fixedly mounted on the bottom of the moving mold 502. The at least two straight rods 601 penetrate the fixed mold 501, and the parts penetrated by the at least two straight rods 601 are all outside the molding cavity and can slide up and down in the fixed mold 501. A fixing plate 602 is fixedly mounted on the end of the at least two straight rods 601 away from the moving mold 502. A return spring 603 is sleeved on the part of the at least two straight rods 601 located between the fixed mold 501 and the fixing plate 602. The top of the return spring 603 is fixedly connected to the bottom of the fixed mold 501, and the bottom of the return spring 603 is fixedly connected to the top of the fixing plate 602. By selecting the parameters of the return spring 603, the pressure of the semi-solidified polyurethane fluid in the molding cavity by the moving mold 502 can be adjusted. A roller assembly 604, which can slide on top of the annular track, is fixedly connected to the bottom of the fixed plate 602. The roller assembly 604 includes a roller frame fixedly installed at the bottom of the fixed plate 602 and rollers rotatably installed in the roller frame. A push rod 10, which can rise and fall synchronously with the moving mold 502 and push the molded polyurethane pressure plate upward when the moving mold 502 rises, is fixedly installed on the rolling assembly 6. The push rod 10 is vertically installed at the center of the top of the fixed plate 602 and passes through the bottom of the molding cavity.

[0048] like Figure 1 , Figure 2 , Figure 3 , Figure 11As shown, an injection assembly 7 for injecting polyurethane fluid into a given mold 501 is mounted on an annular track and can slide radially along the track. The injection assembly 7 is located near the right end of the protruding section. The injection assembly 7 includes a first vertical plate 701, an injection tube 702 for injecting polyurethane fluid into the mold 5 is fixedly mounted above the first vertical plate 701, and a first plate assembly 703 for clamping and fixing the fixed mold 501 is fixedly mounted on the side of the first vertical plate 701 near the mold 5. The first vertical plate 701 is vertically fixedly mounted on the top of a second slider 704 that can slide radially along the annular track, and a second slide rail 705 for sliding the second slider 704 is fixedly mounted on the annular track. The injection tube 702 is connected to equipment for producing polyurethane fluid, such as a heating unit.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 11 , Figure 12 As shown, a second driving assembly 8 for driving the injection assembly 7 to slide is also installed on the annular track. The second driving assembly 8 is located between the injection assembly 7 and the feeding assembly 9; the second driving assembly 8 includes a first slider 801 that can slide radially along the annular track, a first slide rail 802 for the first slider 801 to slide is fixedly installed at the edge of the annular track, and a telescopic member 803 that can drive the first slider 801 to slide is fixedly installed on the substrate 101 or below the annular track; the tops of the second slider 704 and the third slider 907 are respectively equipped with contact blocks, and the top of the first slider 801 is equipped with a bent rod 804 that can drive the second slider 704 and the third slider 907 to slide synchronously through the contact blocks. The two ends of the bent rod 804 are respectively provided with contact holes for driving the contact blocks to slide and allowing the contact blocks to slide in the bent rod 804.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 11 , Figure 12 , Figure 13 , Figure 14 , Figure 15As shown, a feeding assembly 9 is slidably mounted on the substrate 101, capable of sliding radially along an annular track synchronously with the injection assembly 7 under the drive of the second driving assembly 8. The feeding assembly 9 is located near the left end of the protruding section. The feeding assembly 9 includes a second vertical plate 901. A second plate group 902 for clamping and fixing the fixed mold 501 is fixedly mounted on the side of the second vertical plate 901 near the mold 5. The second plate group 902 includes a first straight plate 9021 and a second straight plate 9022 that are parallel to each other. A feeding track 903 is fixedly mounted on the side of the first straight plate 9021 away from the mold 5. A feeding push rod 904 is provided on the side of the second straight plate 9022 away from the mold 5, capable of sliding in a direction perpendicular to the second straight plate 9022, for pushing the molded polyurethane pressure plate that has been pushed away from the fixed mold 501 into the feeding track 903. An extension section is formed on the side of the second vertical plate 901 away from the mold 5, and a feeding push rod 904 capable of sliding in a direction perpendicular to the second straight plate 9022 is installed between the extension sections. A movable rod 905 slides in the direction of the second plate group 902. The movable rod 905 is perpendicular to the second plate group 902. One end of the movable rod 905 near the second straight plate 9022 is fixedly connected to the feeding push rod 904 through an L-shaped plate 906. The second vertical plate 901 is vertically fixedly installed on the top of the third slider 907, which can slide radially along the annular track. A third slide rail 908 for sliding the third slider 907 is fixedly installed on the annular track. An L-shaped bracket 909 is fixedly installed on the third slide rail 908. A limit block 9010 is fixedly installed on the top of the movable rod 905. The top of the L-shaped bracket 909 is provided with a bent limiting groove for limiting the movement trajectory of the limit block 9010. The bent limiting groove has a trapezoidal structure without a bottom edge.

[0051] The working principle of this utility model is as follows: After the polyurethane fluid is prepared, the motor 302 is started. The output shaft of the motor 302 rotates, driving the gear 303 to rotate. The gear 303 drives the internal gear ring 301 to rotate, and the internal gear ring 301 drives the turntable 2 to rotate counterclockwise. The turntable 2 drives the twelve molds 5 to start rotating through the twelve connecting plates 4 respectively. Initially, the molding cavities of the molds 5 are all empty. Since there are twelve molds 5 in this embodiment, the turntable 2 is set to pause once every 30° rotation. The speed of the motor 302 is determined by the specific molding time required by the polyurethane pressure plate, so that the time for one mold 5 to rotate once is exactly the same as the molding time required for it.

[0052] The fixed mold 501 and the moving mold 502 of the mold 5 located on the smooth section are in contact, and the mold 5 is in a closed state. The molds 5 located on the raised section are in an open state. When a mold 5 rotates from the smooth section to the raised section, the roller 604 will gradually rise, driving the fixed plate 602 to rise. The fixed plate 602 drives the four straight rods 601 to rise (at this time, the push rod 10 will also rise, but it has no actual effect). The four straight rods 601 drive the moving mold 502 to rise, and the return spring 603 is gradually compressed. The mold 5 opens, and the fixed mold 501 and the moving mold 502 separate. When the mold 5 rotates to the highest point of the raised section, the fixed mold 501 and the moving mold 502 are in a fully open state.

[0053] The control motor 302 causes the turntable 2 to pause when the mold 5 gradually moves to the right end of the protruding section. The telescopic end of the telescopic component 803 shortens, causing the first slider 801 to slide on the first slide rail 802 towards the direction of the annular track. The bending rod 804 slides synchronously with the first slider 801. Since the molds 5 are all in an empty state at this time, there is no molded polyurethane pressure plate that needs to be unloaded. Therefore, only the specific working steps of the injection component 7 are described here. The bending rod 804 drives the contact block of the second slider 704 to slide through the contact hole. At the same time, the contact... The block moves in the contact hole from one end near the right end of the bending rod 804 to the end near the midpoint of the bending rod 804. The contact block drives the second slider 704 to slide, and the second slider 704 drives the first vertical plate 701 to slide, so that the fixed mold 501 of the mold 5 located at the right end of the protrusion section is clamped between the first plate group 703, completing the limiting of the fixed mold 501. The injection tube 702 also moves synchronously with the first vertical plate 701 and extends into the fixed mold 501 from the injection hole opened on the side of the fixed mold 501 away from the turntable 2. The polyurethane fluid flows into the fixed mold 501. After injection, the telescopic end of the telescopic component 803 extends, causing the first slider 801 to slide away from the annular track on the first slide rail 802. The bending rod 804 slides synchronously with the first slider 801. The bending rod 804 drives the contact block of the second slider 704 to slide through the contact hole. At the same time, the contact block moves from the end near the midpoint of the bending rod 804 to the end near the right end of the bending rod 804 in the contact hole. The contact block drives the second slider 704 to slide. The second slider 704 drives the first vertical plate 701 to slide, causing the fixed mold 501 to separate from the first plate group 703 and the injection tube 702 to move away from the fixed mold 501. The control motor 302 makes the turntable 2 continue to rotate. The mold 5 that has been injected with polyurethane fluid leaves the raised section and reaches the smooth section. For easy distinction, it will be referred to as the first mold 5. Each mold 5 will be numbered in clockwise order. The next mold 5 to the left of the first mold 5 is the second mold 5. When the second mold 5 reaches the right end of the raised section, the above process is repeated.

[0054] As the first mold 5 gradually rotates from the raised section to the smooth section, the roller component 604 gradually descends, and the return spring 603 begins to return from the compressed state to the naturally extended state. Under the action of gravity and the return spring 603, the fixed plate 602 descends, and the fixed plate 602 drives the four straight rods 601 and the push rod 10 to descend. The four straight rods 601 drive the moving mold 502 to descend. When the return spring 603 returns to the naturally extended state, the mold 5 is in a completely closed state. The moving mold 502 will block the injection hole on the fixed mold 501, and the push rod 10 will block the hole at the bottom of the molding cavity, so the molding cavity is in a sealed state.

[0055] When the first mold 5 rotates counterclockwise for nearly one full turn and reaches the left end of the raised section, the molded polyurethane pressure plate is already inside. At this time, the eleventh mold 5 is at the right end of the raised section, and the twelfth mold 5 is also located on the raised section, between the first mold 5 and the eleventh mold 5.

[0056] The telescopic end of the telescopic component 803 shortens, causing the bending rod 804 to slide through the contact holes at both ends, respectively driving the contact blocks of the second slider 704 and the third slider 907 to slide. The process of the injection assembly 7 injecting polyurethane fluid into the eleventh mold 5 is as described above and will not be repeated here. The focus is on describing the process of the unloading assembly 9 unloading material into the first mold 5. The contact block of the third slider 907 moves in the contact hole from the end near the left end of the bending rod 804 to the end near the midpoint of the bending rod 804. The contact block drives the third slider 907 to slide. The third slider 907 drives the second vertical plate 901 to slide, so that the fixed mold 501 of the first mold 5 is clamped between the second plate group 902. At the same time, the extension of the first vertical plate 9021 and the second vertical plate 9021 are connected. The extension of plate 9022 will drive the movable rod 905 to slide synchronously with the second vertical plate 901. The movable rod 905 drives the unloading push rod 904 to approach the turntable 2 through the L-shaped plate 906. At the same time, the limiting block 9010 at the top of the movable rod 905 is in the bent limiting groove of the L-shaped bracket 909. First, it drives the movable rod 905 to move in the direction of the second straight plate 9022, so that the unloading push rod 904 first releases the storage state used to save space, and then makes the unloading push rod 904 stop at the state with the maximum distance from the second straight plate 9022. Finally, it drives the unloading push rod 904 to move in the direction of the first straight plate 9021. During the movement, the unloading push rod 904 will push the molded polyurethane pressure plate into the unloading track 903.

[0057] After the injection component 7 has injected polyurethane fluid into the eleventh mold 5 and the unloading component 9 has moved the polyurethane pressure plate formed in the first mold 5 to the unloading track 903, the telescopic end of the telescopic component 803 extends, causing the bending rod 804 to slide through the contact holes at both ends, respectively driving the contact blocks of the second slider 704 and the third slider 907 to slide. The process of the injection component 7 leaving the eleventh mold 5 has been described. The unloading component 9 then causes the third slider 907 to drive the second vertical plate 901 to slide. The second vertical plate 901 drives the second plate group 902 and the movable rod 905 to slide simultaneously, causing the second plate group 902 to leave the fixed mold 501. Through the limitation of the bent limiting groove, the movable rod 905 first drives the unloading push rod 904 to move in the direction of the second straight plate 9022. When the distance between the unloading push rod 904 and the second straight plate 9022 is at its maximum, the distance is kept constant. Finally, the unloading push rod 904 is driven to move in the direction of the first straight plate 9021, returning to the initial state of being stored. Then turntable 2 continues to rotate.

Claims

1. A molding apparatus for producing polyurethane pressed sheets, characterized in that, Includes a substrate (101), on which an annular turntable (2) is rotatably mounted, and above the substrate (101) is a first drive assembly (3) for driving the turntable (2) to rotate; Multiple connecting plates (4) are fixedly installed around the central axis of the turntable (2), and a mold (5) for molding polyurethane fluid is fixedly installed at the end of each connecting plate (4) away from the turntable (2). The mold (5) includes a fixed mold (501) fixedly connected to the connecting plate (4) and a movable mold (502) that matches the fixed mold (501) and is capable of being raised and lowered; a sealed molding cavity is formed between the fixed mold (501) and the movable mold (502); An annular track is fixedly provided on the outside of the substrate (101). The top of the annular track has a curved structure, which includes a raised section and a smooth section. A rolling component (6) is slidably installed on the fixed mold (501) to drive the moving mold (502) to rise and fall by sliding on the top of the annular track. A push rod (10) is fixedly installed on the rolling component (6) to rise and fall synchronously with the moving mold (502) and to push the molded polyurethane pressure plate upward when the moving mold (502) rises.

2. The molding apparatus for producing polyurethane press plates according to claim 1, characterized in that, A ring-shaped support member (102) is fixedly installed on the top of the substrate (101). The support member (102) includes an outer ring cylinder (1021) and an inner ring cylinder (1022) that are vertically installed on the top of the substrate (101). The bottom of the turntable (2) is fixedly installed with a cylindrical connector (201); there is an annular slot (1023) between the outer ring cylinder (1021) and the inner ring cylinder (1022) for rotatably inserting the connector (201); The first drive component (3) is mounted on the support (102).

3. The molding apparatus for producing polyurethane press plates according to claim 2, characterized in that, The first drive assembly (3) includes an internal gear ring (301) fixedly mounted on the wall of the central hole of the turntable (2); The first drive assembly (3) further includes a motor (302) fixedly installed in the center hole of the support (102), and a gear (303) that meshes with the internal gear ring (301) is fixedly installed on the output shaft of the motor (302).

4. A molding apparatus for producing polyurethane press sheets according to any one of claims 1 to 3, characterized in that, The rolling assembly (6) includes at least two straight rods (601) fixedly installed at the bottom of the moving mold (502). Each of the at least two straight rods (601) passes through the fixed mold (501). A fixing plate (602) is fixedly installed at the end of each of the at least two straight rods (601) away from the moving mold (502). A return spring (603) is sleeved on the portion of each of the at least two straight rods (601) located between the fixed mold (501) and the fixing plate (602). The top of the return spring (603) is fixedly connected to the bottom of the fixed mold (501), and the bottom of the return spring (603) is fixedly connected to the top of the fixing plate (602). A roller (604) capable of sliding on the top of the annular track is fixedly connected to the bottom of the fixing plate (602). The push rod (10) is vertically mounted on the top of the fixed plate (602).

5. A molding apparatus for producing polyurethane press sheets according to any one of claims 1 to 3, characterized in that, An injection assembly (7) for injecting polyurethane fluid into the fixed mold (501) is installed on the annular track and is capable of sliding radially along the annular track. The injection assembly (7) is located near the right end of the protruding section. A second drive assembly (8) for driving the injection assembly (7) to slide is also installed on the annular track.

6. The molding apparatus for producing polyurethane press sheets according to claim 5, characterized in that, The injection assembly (7) includes a first upright plate (701), and an injection tube (702) for injecting polyurethane fluid into the mold (5) is fixedly installed above the first upright plate (701). The first upright plate (701) is vertically fixedly installed on the top of the second slider (704) that can slide radially along the annular track, and a second slide rail (705) for the second slider (704) to slide is fixedly installed on the annular track.

7. A molding apparatus for producing polyurethane press sheets according to claim 6, characterized in that, A feeding component (9) is slidably mounted on the substrate (101) and is capable of sliding radially along an annular track synchronously with the injection component (7) under the drive of the second driving component (8). The feeding component (9) is located near the left end of the protrusion.

8. The molding apparatus for producing polyurethane press plates according to claim 7, characterized in that, The feeding assembly (9) includes a second vertical plate (901), and a second plate group (902) for clamping and fixing the fixed mold (501) is fixedly installed on the side of the second vertical plate (901) near the mold (5); The second plate assembly (902) includes a first straight plate (9021) and a second straight plate (9022) that are parallel to each other. A feeding track (903) is fixedly installed on the side of the first straight plate (9021) away from the mold (5). A feeding push rod (904) is provided on the side of the second straight plate (9022) away from the mold (5) and is capable of sliding in a direction perpendicular to the second straight plate (9022) to push the molded polyurethane pressure plate that has been pushed away from the fixed mold (501) into the feeding track (903). The second plate assembly (902) forms an extension section on the side of the second vertical plate (901) away from the mold (5). A movable rod (905) capable of sliding in a direction perpendicular to the second plate assembly (902) is installed between the extension sections. The movable rod (905) is perpendicular to the second plate assembly (902). The end of the movable rod (905) near the second straight plate (9022) is fixedly connected to the unloading push rod (904) through an L-shaped plate (906). The second upright plate (901) is vertically fixedly installed on the top of the third slider (907) which can slide radially along the annular track. A third slide rail (908) for sliding the third slider (907) is fixedly installed on the annular track. An L-shaped bracket (909) is fixedly installed on the third slide rail (908). A limit block (9010) is fixedly installed on the top of the movable rod (905). A bent limit groove is provided on the top of the L-shaped bracket (909) for limiting the movement trajectory of the limit block (9010). The bent limit groove has a trapezoidal structure without a bottom edge.

9. A molding apparatus for producing polyurethane press plates according to claim 8, characterized in that, The second drive component (8) is located between the injection component (7) and the feeding component (9); The second drive assembly (8) includes a first slider (801) that can slide radially along the annular track, a first slide rail (802) for sliding the first slider (801) is fixedly installed at the edge of the annular track, and a telescopic member (803) that can drive the first slider (801) to slide is fixedly installed on the base plate (101) or below the annular track. The top of the second slider (704) and the third slider (907) are respectively equipped with contact blocks. The top of the first slider (801) is equipped with a bent rod (804) that can drive the second slider (704) and the third slider (907) to slide synchronously through the contact blocks. The two ends of the bent rod (804) are respectively provided with contact holes for driving the contact blocks to slide and for allowing the contact blocks to slide in the bent rod (804).

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