A polyurethane foaming machine and a production process for washable slow-rebound pillow cores

Abstract

The present invention discloses a polyurethane foaming machine and a production process for a washable slow-rebound pillow core, and relates to the technical field of foaming machines. The polyurethane foaming machine includes a raw material tank, a gas tank, a mixing head, a box body, and a raw material pump, and also includes: a measuring mechanism. The polyurethane foaming machine and the production process for a washable slow-rebound pillow core are convenient for measuring the uniformity of the material in the raw material tank. When the material is uneven, the raw material pump stops feeding, and at the same time, the efficiency and effect of material mixing are improved. When the material is uniform, the feeding continues to ensure the quality of foaming, and thus ensure the production quality of the washable molded polyurethane slow-rebound pillow core; the constant temperature liquid can be circulated into the second chamber, which is convenient for controlling the temperature of the raw material in the raw material tank, ensuring the foaming effect, and thus ensuring the production quality of the washable molded polyurethane slow-rebound pillow core. Moreover, it is convenient to adjust according to the height of the material to avoid energy waste, which is more energy-saving and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of foaming machines, in particular to a polyurethane foaming machine and a production process for a washable slow-rebound pillow core. Background Art

[0002] A polyurethane foaming machine is a device used for the infusion and foaming of polyurethane foam plastics. Using polyether polyols and polyisocyanates as the main raw materials, the foam is produced through a chemical reaction in the presence of various chemical additives, such as blowing agents, catalysts, and emulsifiers. The basic principle is to introduce gas into a foaming agent aqueous solution. Different types of machines use different methods of gas introduction. High-pressure, medium-pressure, and low-pressure models offer rapid foaming speed, high efficiency, and uniform, fine bubbles, resulting in uniform, qualified foam products. During operation, the raw materials are stored in separate tanks equipped with a stirring device to prevent sedimentation and a heating / insulation device to maintain a constant temperature, typically between 20–30°C, to ensure fluidity and reactivity. A metering pump (such as a gear pump or plunger pump) delivers the raw materials from the tanks in a predetermined ratio to a high-pressure mixing head, where they are mixed at high speed (1000–3000 rpm) to form a uniform reaction system. The mixed materials are then injected into a mold, where they foam and solidify, creating a washable, molded polyurethane slow-rebound pillow core.

[0003] However, when using the existing polyurethane foaming machine and washable slow-rebound pillow core production process, it is not convenient to measure the uniformity of the raw materials in the raw material tank, which affects the quality of foaming and further affects the production quality of the washable molded polyurethane slow-rebound pillow core; it is not convenient to control the temperature of the raw materials in the raw material tank, which also affects the quality of foaming and further affects the production quality of the washable molded polyurethane slow-rebound pillow core. Summary of the Invention

[0004] The object of the present invention is to provide a polyurethane foaming machine and a production process for a washable slow-rebound pillow core to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a polyurethane foaming machine, comprising a raw material tank, a gas tank, a mixing head, a box body and a raw material pump, and further comprising:

[0006] A measuring mechanism, disposed in each of the raw material tanks, for measuring the uniformity of the raw materials;

[0007] The measuring mechanism comprises:

[0008] A first rotating tube rotates at the bottom of the raw material tank and is driven to rotate by a driving assembly;

[0009] A plurality of mounting holes are formed on the side wall of the first rotating tube, and a first sealing ring is fixedly connected in each mounting hole;

[0010] A second rotating tube is fixedly inserted into each first sealing ring, and one end of the second rotating tube outside the first rotating tube is fixedly connected to a hollow cover;

[0011] a plurality of fixing plates fixed to the inner side wall of the first rotating tube;

[0012] a collar, rotating on the side wall of the second rotating tube and rotatably connected to the bottom of the fixed plate via a rotating shaft;

[0013] a measuring assembly, disposed on top of the fixed plate, for measuring the rotation of the shaft;

[0014] A constant temperature mechanism is provided in the hollow cover and is used to control the temperature of the raw materials in the raw material tank;

[0015] The driving mechanism is arranged in the first rotating tube and is used for driving the second rotating tube to rotate back and forth.

[0016] The top of described sliding panel also is provided with an interlocking structure, and the interlocking structure is hinged on the base plate, is fixed with a first end in contact with the interlocking structure, and an end of sliding panel withstands on the backrest of interlocking structures.

[0017] Preferably, the moving mechanism includes a support block fixedly connected to the top of the fixed plate, and the side walls of the support block are fixedly connected to two symmetrically arranged sleeves, a sleeve rod is inserted into the sleeve, and the other end of the sleeve rod is fixedly connected to an L-shaped block, and the L-shaped block is fixed to the side wall of the moving plate.

[0018] Preferably, the telescopic mechanism includes a mounting groove provided on the side wall of the movable plate, and the detection block is inserted in the mounting groove and connected to the side wall of the mounting groove through a second spring, the side wall of the fixed plate is fixedly connected to an L-shaped frame, and the top of the L-shaped frame is fixedly connected to a stopper, the side wall of the stopper is provided with an inclined surface, and the side wall of the detection block is fixedly connected to a push rod so that the end of the push rod can slide on the inclined surface.

[0019] Preferably, the constant temperature mechanism includes a first partition fixedly connected to the hollow cover, and a through hole is provided on the top of the first partition, the first partition divides the interior of the hollow cover into a first chamber and a second chamber, and a second partition is fixedly connected to the second rotating tube, the second partition divides the second rotating tube into a third chamber and a fourth chamber, and the second rotating tube, the first rotating tube is provided with a liquid supply mechanism for supplying circulating liquid into the hollow cover.

[0020] Preferably, the liquid supply mechanism includes a liquid supply pipe inserted in the first rotating tube, and the bottom of the liquid supply pipe is fixedly connected to a water pump, the bottom of the water pump is fixedly connected to a liquid extraction pipe, and the bottom of the box is fixedly connected to a constant temperature bath, the liquid extraction pipe is inserted in the constant temperature bath, and a return liquid hole is provided at the bottom of the liquid supply pipe, a plurality of first sockets are provided on the side wall of the liquid supply pipe, and the second rotating tube is inserted in the first socket and fixedly connected to the side wall of the first socket with a second sealing ring, an L-shaped liquid inlet pipe is fixedly connected to the side wall of the third chamber, and a liquid outlet pipe is fixedly connected between the fourth chamber and the liquid supply pipe, a plurality of first L-shaped plates are inserted into the side wall of the liquid supply pipe, and the upper end of the first L-shaped plate is fixed to the side wall of the movable plate, the lower end of the first L-shaped plate is fixedly connected to a rubber ring, and the side wall of the rubber ring is provided with a rounded corner.

[0021] Preferably, the driving mechanism includes a fixed block fixedly connected to the side wall of each second rotating tube, and the side wall of the liquid supply tube is connected to a plurality of lifting plates through a lifting mechanism, the side wall of the lifting plate is fixedly connected to a U-shaped plate, and the fixed block is inserted in the U-shaped plate, and a connecting mechanism is provided between two adjacent lifting plates.

[0022] Preferably, the lifting mechanism includes a support plate fixedly connected to the side wall of the liquid supply pipe, and the side wall of the support plate is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a disc, and the side wall of the disc is fixedly connected to a plurality of array-arranged protrusions, the side wall of the liquid supply pipe is fixedly connected to two symmetrically arranged second connecting plates, and the opposite side walls of the two second connecting plates are fixedly connected to two symmetrically arranged second guide rods, the side wall of each second guide rod is provided with a slider, the slider is fixed to the side wall of the U-shaped plate, and the side wall of each second guide rod is provided with a third spring.

[0023] Preferably, the connecting mechanism includes a second jack formed on the side wall of the lifting plate, and a second L-shaped plate is inserted into the side wall of the liquid supply pipe, the upper end of the second L-shaped plate is fixed to the side wall of the rubber ring, and two movable rods are inserted into the bottom of the second L-shaped plate, both ends of the movable rods are fixedly connected to mounting blocks, the side wall of the mounting block is fixedly connected to a third connecting plate, and a latch is inserted into the side wall of the third connecting plate;

[0024] The driving assembly includes a driven bevel gear fixedly sleeved on the side wall of the first rotating tube, and two second motors are fixedly connected to the bottom of the box body, the output end of the second motor is fixedly connected to a connecting shaft, and the side wall of the connecting shaft is fixedly sleeved with a driving bevel gear, and the driving bevel gear is meshed with the driven bevel gear.

[0025] A production process for a washable slow-rebound pillow core comprises the following steps:

[0026] S1: Raw material preparation: polyether polyol, isocyanate, catalyst, foaming agent and cell opener are mixed according to weight ratio;

[0027] S2: Dynamic mixing: The raw materials are fully mixed in the high-speed rotating mixing head through the foaming machine;

[0028] S3: Mold injection: The mixed raw materials are injected into a mold equipped with a heating device, and the mold temperature is controlled at 40-60°C;

[0029] S4: Curing and molding: Maintaining the pressure at 1.2-1.5 MPa for 15-20 minutes to form a slow-rebound foam;

[0030] S5: Water washing: Soak the formed pillow core in deionized water at 50-60°C for 30-45 minutes, and then perform high-pressure spray cleaning;

[0031] S6: Vacuum drying: Dry at 60-70°C for 2-3 hours under a vacuum degree of -0.08 to -0.1 MPa.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] This polyurethane foaming machine and washable slow-rebound pillow core production process, by setting a measuring mechanism, etc., when in use, the raw materials in the raw material tank are transported to the mixing head through the raw material pump for high-speed impact mixing to form a uniform reaction system, and the mixed raw materials are injected into the mold, foamed and solidified in the mold to form a washable molded polyurethane slow-rebound pillow core. At the same time, the second motor is started, and the rotation of the second motor drives the connecting shaft and the active bevel gear to rotate, thereby driving the driven bevel gear and the first rotating tube to rotate clockwise, and then can drive multiple hollow covers to rotate. Under the action of the resistance of the raw material, the second rotating tube can be pushed to rotate counterclockwise along the sleeve and the rotating shaft. When the rotating shaft rotates, it drives the gear to rotate, thereby pushing the rack to move, and the first spring is compressed. At the same time, when the rack moves, it can be brought through the first mounting plate When the cam is in a state of being moved counterclockwise, the first push pin is moved and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is pushed and the second push pin is

[0034] The polyurethane foaming machine and the production process of the washable slow-rebound pillow core are provided with a constant temperature mechanism, etc., so that when the hollow cover is in contact with the material, it can rotate. At the same time, when the movable plate rotates, the rubber ring can be driven to move through the first L-shaped plate and separate from the lower end of the liquid inlet pipe. At the same time, the water pump is started, so that the constant temperature liquid in the constant temperature tank can enter the liquid supply pipe through the liquid extraction pipe and the water pump, and then enter the third chamber and the first chamber through the liquid inlet pipe, and then enter the second chamber through the through hole, and then enter the second chamber through the through hole. After the fourth chamber and the liquid outlet pipe, it enters the liquid supply pipe and returns to the constant temperature tank through the liquid return hole. In this way, the second chamber can be circulated with constant temperature liquid, which is convenient for controlling the temperature of the raw materials in the raw material tank, ensuring the foaming effect, and thus ensuring the production quality of the washable molded polyurethane slow rebound pillow core. In addition, the second rotating tube will not rotate in the hollow cover above the liquid level. At this time, the rubber ring can block and seal the entrance of the liquid inlet pipe. At this time, constant temperature liquid will not be supplied to the hollow cover above the liquid level, avoiding energy waste and being more energy-saving and environmentally friendly.

[0035] This polyurethane foaming machine and washable slow rebound pillow core production process, by setting a driving mechanism, etc., when measuring the uniformity of the raw materials in the raw material tank, when the hollow cover is against the material, it can push the second rotating tube to rotate, at this time, it can drive the rubber ring to move, at the same time, when the rubber ring moves, it can drive the third connecting plate to move through the second L-shaped plate, and insert the pin into the second socket, when it is measured that the raw materials in the raw material tank are uneven, the first motor can be started, and the rotation of the first motor drives the rotation of the disc, when the protrusion is against the bottom of the lifting plate, it can push the lifting plate to move upward, and at the same time, the third spring is compressed, and when the protrusion passes over the lifting plate, the third connecting plate can be driven to move upward. When the bottom of the plate is reached, the lifting plate can move downward and reset under the action of the third spring, and so on and so forth, the lifting plate can drive the U-shaped plate to move back and forth, thereby driving the second rotating tube to rotate back and forth through the fixed block, and then driving the hollow cover to rotate back and forth, which can improve the efficiency and effect of mixing, and the hollow cover above the liquid level will not rotate back and forth, avoiding energy waste, and being more energy-saving and environmentally friendly. After mixing for a period of time, the first motor is stopped, and in this way, the second rotating tube and the hollow cover can rotate and reset under the action of the third spring, and then the uniformity of the raw materials in the raw material tank is measured again. When the material is uniform, the raw material pump is started to continue feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 Schematic diagram of the internal structure of the box in the present invention;

[0038] Figure 3 This is a schematic diagram of the internal structure of the box in another perspective of the present invention;

[0039] Figure 4 It is a partial cross-sectional structural schematic diagram of the raw material tank in the present invention;

[0040] Figure 5 This is a schematic diagram of a partial cross-sectional structure of the raw material tank in the present invention from another perspective;

[0041] Figure 6 It is a partial cross-sectional structural diagram of the raw material tank, the first rotating tube and the liquid supply tube in the present invention;

[0042] Figure 7 Schematic diagram of the cross-sectional structure of the hollow cover and the second rotating tube in the present invention;

[0043] Figure 8 for Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0044] Figure 9 for Figure 3Schematic diagram of the enlarged structure at B in the middle;

[0045] Figure 10 for Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0046] Figure 11 for Figure 5 Schematic diagram of the enlarged structure at D in the middle;

[0047] Figure 12 for Figure 6 Schematic diagram of the enlarged structure at E in the middle;

[0048] Figure 13 for Figure 10 Schematic diagram of the enlarged structure at F in the middle;

[0049] Figure 14 for Figure 13 Schematic diagram of the enlarged structure at G in the middle;

[0050] Figure 15 for Figure 11 Schematic diagram of the enlarged structure at H in the middle;

[0051] Figure 16 for Figure 12 Schematic diagram of the enlarged structure at point I.

[0052] In the figure: 101, raw material tank; 102, gas tank; 103, mixing head; 104, box; 105, raw material pump; 201, support block; 202, sleeve; 203, sleeve rod; 204, L-shaped block; 205, rotating pin; 206, rotating plate; 207, first slide; 208, first push pin; 209, second slide; 210, second push pin; 211, first connecting plate; 212, first guide rod; 213, rack; 214, first spring; 215, first mounting plate ; 216, gear; 301, mounting groove; 302, second spring; 303, L-shaped block; 304, stopper; 305, inclined surface; 306, push rod; 401, first partition; 402, through hole; 403, first chamber; 404, second chamber; 405, second partition; 406, fourth chamber; 407, third chamber; 501, liquid supply pipe; 502, liquid return hole; 503, water pump; 504, liquid extraction pipe; 505, constant temperature bath; 506, liquid outlet pipe; 507, liquid inlet pipe ; 508, first L-shaped plate; 509, rubber ring; 510, fillet; 511, first jack; 512, second sealing ring; 601, driven bevel gear; 602, second motor; 603, connecting shaft; 604, driving bevel gear; 701, fixing block; 702, lifting plate; 703, U-shaped plate; 801, second connecting plate; 802, second guide rod; 803, slider; 804, third spring; 805, support plate; 806, first motor; 807, disc; 808, Protrusion; 901, second insertion hole; 902, second L-shaped plate; 903, moving rod; 904, mounting block; 905, third connecting plate; 906, latch; 1001, first rotating tube; 1002, mounting hole; 1003, first sealing ring; 1004, second rotating tube; 1005, hollow cover; 1006, fixed plate; 1007, rotating shaft; 1008, sleeve; 1009, moving plate; 1010, detection block; 1011, second mounting plate; 1012, visual sensor. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] See also Figures 1-16The present invention provides a polyurethane foaming machine, including a raw material tank 101, a gas tank 102, a mixing head 103, a box 104 and a raw material pump 105. The raw material tank 101, the gas tank 102, the mixing head 103, the box 104 and the raw material pump 105 are well known in the art and will not be described in detail here. The mixing head 103 can be mounted on a robotic arm to facilitate injection into a mold. The machine also includes:

[0055] A measuring mechanism is provided in each raw material tank 101 and is used to measure the uniformity of the raw materials;

[0056] The measurement organizations include:

[0057] The first rotating tube 1001 rotates at the bottom of the raw material tank 101 and is driven to rotate by a driving assembly;

[0058] A plurality of mounting holes 1002 are provided on the side wall of the first rotating tube 1001 and a first sealing ring 1003 is fixedly connected in each mounting hole 1002;

[0059] The second rotating tube 1004 is fixedly inserted into each first sealing ring 1003, and one end of the second rotating tube 1004 outside the first rotating tube 1001 is fixedly connected to the hollow cover 1005;

[0060] A plurality of fixing plates 1006 fixed to the inner wall of the first rotating tube 1001;

[0061] The collar 1008 rotates on the side wall of the second rotating tube 1004 and is rotatably connected to the bottom of the fixed plate 1006 via the rotating shaft 1007;

[0062] A measuring assembly, disposed on top of the fixed plate 1006 , for measuring the rotation of the rotating shaft 1007 ;

[0063] A constant temperature mechanism is provided in the hollow cover 1005 and is used to control the temperature of the raw materials in the raw material tank 101;

[0064] The driving mechanism is arranged in the first rotating tube 1001 and is used to drive the second rotating tube 1004 to rotate back and forth, so as to measure the uniformity of the material in the raw material tank 101. When the material is uneven, the raw material pump 105 stops feeding, and at the same time, the efficiency and effect of material mixing are improved. When the material is uniform, the raw material pump 105 is started and the feeding is continued to ensure the quality of foaming, thereby ensuring the production quality of the washable molded polyurethane slow rebound pillow core; the constant temperature liquid can be circulated into the second chamber 404, which is convenient for controlling the temperature of the raw material in the raw material tank 101, ensuring the foaming effect, thereby ensuring the production quality of the washable molded polyurethane slow rebound pillow core, and it is convenient to adjust according to the height of the material to avoid energy waste, which is more energy-saving and environmentally friendly.

[0065] The measuring assembly includes a gear 216 fixedly sleeved on the side wall of the rotating shaft 1007, and the top of the fixed plate 1006 is fixedly connected to two symmetrically arranged first connecting plates 211, the side walls of the first connecting plate 211 are fixedly connected to two symmetrically arranged first guide rods 212, and the side walls of the first guide rods 212 are sleeved with racks 213, and the side walls of each first guide rod 212 are sleeved with first springs 214, and the racks 213 are meshed with the gears 216. The top of the fixed plate 1006 is rotatably connected to the rotating plate 206 through the rotating pin 205. The rotating plate 206 is rotated. A first slide groove 207 and a second slide groove 209 are provided at the top, and the top of the rack 213 is fixedly connected to a first mounting plate 215, and the bottom of the first mounting plate 215 is fixedly connected to a first push pin 208, and the first push pin 208 is inserted in the first slide groove 207. The top of the fixed plate 1006 is connected to the movable plate 1009 through a movable mechanism, and the bottom of the movable plate 1009 is fixedly connected to a second push pin 210, and the second push pin 210 is inserted in the second slide groove 209, and the side wall of the movable plate 1009 is connected to the detection block 1010 through a telescopic mechanism. The inner side wall of the first rotating tube 1001 is fixedly connected to the second mounting plate 1011, and the side wall of the second mounting plate 1011 is fixedly connected to the visual sensor 1012. The second motor 602 is started, and the rotation of the second motor 602 drives the connecting shaft 603 and the active bevel gear 604 to rotate, thereby driving the driven bevel gear 601 and the first rotating tube 1001 to rotate clockwise, and then can drive the multiple hollow covers 1005 to rotate. Under the resistance of the raw material, the second rotating tube 1004 can be pushed to rotate counterclockwise along the collar 1008 and the rotating shaft 1007. When the rotating shaft 1007 rotates clockwise, it drives the gear 216 to rotate, thereby pushing the rack 213 to move, and the first spring 214 is compressed. At the same time, when the rack 213 moves, it can drive the first push pin 208 to slide in the first slide groove 207 through the first mounting plate 215, thereby pushing the rotating plate 206 to rotate counterclockwise along the rotating pin 205. When the rotating plate 206 rotates counterclockwise, it can push the second push pin 210 to slide along the second slide groove 209, thereby pushing the movable plate 1009 to move.

[0066] The moving mechanism includes a support block 201 fixedly connected to the top of the fixed plate 1006, and the side walls of the support block 201 are fixedly connected to two symmetrically arranged sleeves 202, a sleeve rod 203 is inserted into the sleeve 202, and the other end of the sleeve rod 203 is fixedly connected to an L-shaped block 204, and the L-shaped block 204 is fixed to the side wall of the moving plate 1009, guiding the movement of the moving plate 1009.

[0067] The telescopic mechanism includes a mounting groove 301 provided on the side wall of the movable plate 1009, and the detection block 1010 is inserted into the mounting groove 301 and connected to the side wall of the mounting groove 301 through a second spring 302. The side wall of the fixed plate 1006 is fixedly connected to an L-shaped frame 303, and the top of the L-shaped frame 303 is fixedly connected to a stopper 304. The side wall of the stopper 304 is provided with an inclined surface 305. The side wall of the detection block 1010 is fixedly connected to a push rod 306 so that the end of the push rod 306 can be When the movable plate 1009 moves, the sleeve rod 203 slides into the sleeve 202. When the end of the push rod 306 slides along the inclined surface 305 and disengages from the stop block 304, the detection block 1010 can move away from the movable plate 1009 under the action of the second spring 302 and move to above the visual sensor 1012, while the detection block 1010 corresponding to the hollow cover 1005 that is not in contact with the material will not be detected by the visual sensor 1012.

[0068] The constant temperature mechanism includes a first partition 401 fixedly connected to the hollow cover 1005, and a through hole 402 is opened on the top of the first partition 401. The first partition 401 divides the interior of the hollow cover 1005 into a first chamber 403 and a second chamber 404. A second partition 405 is fixedly connected to the second rotating tube 1004. The second partition 405 divides the second rotating tube 1004 into a third chamber 407 and a fourth chamber 406. The second rotating tube 1004 and the first rotating tube 1001 are provided with a liquid supply mechanism for supplying circulating liquid into the hollow cover 1005, and constant temperature liquid is circulated into the hollow cover 1005 through the liquid supply mechanism.

[0069] The liquid supply mechanism includes a liquid supply pipe 501 inserted in the first rotating tube 1001, and the bottom of the liquid supply pipe 501 is fixedly connected to a water pump 503, the bottom of the water pump 503 is fixedly connected to a liquid extraction pipe 504, and the bottom of the box body 104 is fixedly connected to a constant temperature bath 505, a temperature control module is provided in the constant temperature bath 505, the liquid extraction pipe 504 is inserted in the constant temperature bath 505, and the bottom of the liquid supply pipe 501 is provided with a return liquid hole 502, the side wall of the liquid supply pipe 501 is provided with a plurality of first jacks 511, and the second rotating tube 1004 is inserted in the first jack 511 and fixedly connected to the side wall of the first jack 511 There is a second sealing ring 512, the first sealing ring 1003 and the second sealing ring 512 can be made of soft materials such as a telescopic cover, the side wall of the third chamber 407 is fixedly connected with an L-shaped liquid inlet pipe 507, and a liquid outlet pipe 506 is fixedly connected between the fourth chamber 406 and the liquid supply pipe 501, and the liquid outlet pipe 506 is a hose. A plurality of first L-shaped plates 508 are inserted into the side wall of the liquid supply pipe 501, and the upper end of the first L-shaped plate 508 is fixed to the side wall of the movable plate 1009, and the lower end of the first L-shaped plate 508 is fixedly connected with a rubber ring 509, and the side wall of the rubber ring 509 is provided with a rounded corner 510. When the second chamber 404 contacts the material, it can rotate. At the same time, when the movable plate 1009 rotates, the rubber ring 509 can be driven to move through the first L-shaped plate 508 and separate from the lower end of the liquid inlet pipe 507. At the same time, the water pump 503 is started, so that the constant temperature liquid in the constant temperature tank 505 can enter the liquid supply pipe 501 through the liquid extraction pipe 504 and the water pump 503, and then enter the third chamber 407 and the first chamber 403 through the liquid inlet pipe 507, and then enter the second chamber 404 through the through hole 402, and then enter the fourth chamber 406 and the liquid outlet pipe 506. Then it enters the liquid supply pipe 501 and returns to the constant temperature tank 505 through the liquid return hole 502. In this way, the second chamber 404 can be circulated with constant temperature liquid, which is convenient for controlling the temperature of the raw materials in the raw material tank 101, ensuring the foaming effect, and then ensuring the production quality of the washable molded polyurethane slow rebound pillow core. In addition, the hollow cover 1005 above the liquid level and the second rotating tube 1004 will not rotate. At this time, the rubber ring 509 can block and seal the entrance of the liquid inlet pipe 507. At this time, constant temperature liquid will not be supplied to the hollow cover 1005 above the liquid level, avoiding energy waste and being more energy-saving and environmentally friendly.

[0070] The driving mechanism includes a fixed block 701 fixedly connected to the side wall of each second rotating tube 1004, and the side wall of the liquid supply tube 501 is connected to multiple lifting plates 702 through a lifting mechanism. The side wall of the lifting plate 702 is fixedly connected to a U-shaped plate 703, and the fixed block 701 is inserted into the U-shaped plate 703. A connecting mechanism is provided between two adjacent lifting plates 702, and the lifting plates 702 are connected by the connecting mechanism. In addition, the lifting plates 702 are moved up and down by the lifting mechanism, so that the lifting plates 702 drive the U-shaped plates 703 to move back and forth, thereby driving the second rotating tube 1004 to rotate back and forth through the fixed block 701, and then driving the hollow cover 1005 to rotate back and forth, which can improve the efficiency and effect of mixing.

[0071] The lifting mechanism includes a support plate 805 fixedly connected to the side wall of the liquid supply pipe 501, and the side wall of the support plate 805 is fixedly connected to a first motor 806, the output end of the first motor 806 is fixedly connected to a disc 807, and the side wall of the disc 807 is fixedly connected to a plurality of array-arranged protrusions 808, the side wall of the liquid supply pipe 501 is fixedly connected to two symmetrically arranged second connecting plates 801, and the opposite side walls of the two second connecting plates 801 are fixedly connected to two symmetrically arranged second guide rods 802, the side wall of each second guide rod 802 is sleeved with a slider 803, the slider 803 is fixed to the side wall of the U-shaped plate 703, and each second guide rod 802 The side wall of the lifting plate 702 is sleeved with a third spring 804, which starts the first motor 806. The rotation of the first motor 806 drives the rotation of the disc 807. When the protrusion 808 contacts the bottom of the lifting plate 702, the lifting plate 702 can be pushed to move upward. At the same time, the third spring 804 is compressed. When the protrusion 808 passes over the bottom of the lifting plate 702, the lifting plate 702 can move downward and reset under the action of the third spring 804. This reciprocating process can make the lifting plate 702 drive the U-shaped plate 703 to move back and forth, thereby driving the second rotating tube 1004 to rotate back and forth through the fixed block 701, and then driving the hollow cover 1005 to rotate back and forth.

[0072] The connecting mechanism includes a second insertion hole 901 provided on the side wall of the lifting plate 702, and a second L-shaped plate 902 is inserted into the side wall of the liquid supply pipe 501, the upper end of the second L-shaped plate 902 is fixed to the side wall of the rubber ring 509, and two moving rods 903 are inserted into the bottom of the second L-shaped plate 902, and both ends of the moving rod 903 are fixedly connected to the mounting block 904, and the side wall of the mounting block 904 is fixedly connected to the third connecting plate 905, and the side wall of the third connecting plate 905 is inserted with a latch 906. When the hollow cover 1005 is in contact with the material, the second rotating tube 1004 can be pushed to rotate, and at this time, the rubber ring 509 can be driven to move. At the same time, when the rubber ring 509 moves, the third connecting plate 905 can be driven to move through the second L-shaped plate 902, and the latch 906 is inserted into the second insertion hole 901. In addition, the hollow cover 1005 above the liquid level will not rotate back and forth, thereby avoiding energy waste and being more energy-saving and environmentally friendly.

[0073] The driving assembly includes a driven bevel gear 601 fixedly sleeved on the side wall of the first rotating tube 1001, and two second motors 602 are fixedly connected to the bottom of the box body 104, the output end of the second motor 602 is fixedly connected to the connecting shaft 603, and the side wall of the connecting shaft 603 is fixedly sleeved with a driving bevel gear 604, and the driving bevel gear 604 is meshed with the driven bevel gear 601. When the second motor 602 is started, the rotation of the second motor 602 drives the connecting shaft 603 and the driving bevel gear 604 to rotate, thereby driving the driven bevel gear 601 and the first rotating tube 1001 to rotate clockwise, and then driving multiple hollow covers 1005 to rotate.

[0074] A production process for a washable slow-rebound pillow core comprises the following steps:

[0075] S1: Raw material preparation: polyether polyol, isocyanate, catalyst, foaming agent and cell opener are mixed according to weight ratio;

[0076] S2: Dynamic mixing: The raw materials are fully mixed in the high-speed rotating mixing head 103 through the foaming machine;

[0077] S3: Mold injection: The mixed raw materials are injected into a mold equipped with a heating device, and the mold temperature is controlled at 40-60°C;

[0078] S4: Curing and molding: Maintaining the pressure at 1.2-1.5 MPa for 15-20 minutes to form a slow-rebound foam;

[0079] S5: Water washing: Soak the formed pillow core in deionized water at 50-60°C for 30-45 minutes, and then perform high-pressure spray cleaning;

[0080] S6: Vacuum drying: Dry at 60-70°C for 2-3 hours under a vacuum degree of -0.08 to -0.1 MPa.

[0081] Working principle: When in use, the raw materials in the raw material tank 101 are transported to the mixing head 103 through the raw material pump 105 for high-speed impact mixing to form a uniform reaction system. The mixed raw materials are injected into the mold, foamed and solidified in the mold to form a water-washed molded polyurethane slow rebound pillow core. At the same time, the second motor 602 is started, and the rotation of the second motor 602 drives the connecting shaft 603 and the active bevel gear 604 to rotate, thereby driving the driven bevel gear 601 and the first rotating tube 1001 to rotate clockwise, and then can drive multiple hollow covers 1005 to rotate. Under the resistance of the raw material, it can push the second rotating tube 1004 to rotate counterclockwise along the ring 1008 and the rotating shaft 1007.

[0082] When the rotating shaft 1007 rotates, it drives the gear 216 to rotate, thereby pushing the rack 213 to move, and the first spring 214 is compressed. At the same time, when the rack 213 moves, it can drive the first push pin 208 to slide in the first slide groove 207 through the first mounting plate 215, thereby pushing the rotating plate 206 to rotate counterclockwise along the rotating pin 205. When the rotating plate 206 rotates counterclockwise, it can push the second push pin 210 to slide along the second slide groove 209, thereby pushing the movable plate 1009 to move away from the block 304. At the same time, the sleeve rod 203 slides into the sleeve 202.

[0083] When the end of the push rod 306 slides along the inclined surface 305 and disengages from the stop block 304, the detection block 1010 can move away from the movable plate 1009 and move to the top of the visual sensor 1012 under the action of the second spring 302, while the detection block 1010 corresponding to the hollow cover 1005 that is not in contact with the material will not be detected by the visual sensor 1012. At this time, by observing the position of the extended detection block 1010 through the visual sensor 1012, it can be determined whether the resistance encountered by the hollow cover 1005 is the same, and then the uniformity of the material can be determined. When the material is uneven, the raw material pump 105 stops feeding to ensure the quality of foaming, and then ensure the production quality of the washable molded polyurethane slow rebound pillow core.

[0084] When the hollow cover 1005 is against the material, it can rotate. At the same time, when the movable plate 1009 rotates, the rubber ring 509 can be driven to move through the first L-shaped plate 508 and separate from the lower end of the liquid inlet pipe 507. At the same time, the water pump 503 is started, so that the constant temperature liquid in the constant temperature tank 505 can enter the liquid supply pipe 501 through the liquid extraction pipe 504 and the water pump 503, and then enter the third chamber 407 and the first chamber 403 through the liquid inlet pipe 507, and then enter the second chamber 404 through the through hole 402, and then pass through the fourth chamber 406 and the liquid outlet pipe 506. It enters the liquid supply pipe 501 and returns to the constant temperature tank 505 through the liquid return hole 502, and repeats this process to circulate constant temperature liquid into the second chamber 404, thereby facilitating the control of the temperature of the raw materials in the raw material tank 101, ensuring the foaming effect, and further ensuring the production quality of the washable molded polyurethane slow rebound pillow core. In addition, the hollow cover 1005 above the liquid level and the second rotating tube 1004 will not rotate. At this time, the rubber ring 509 can block and seal the entrance of the liquid inlet pipe 507. At this time, constant temperature liquid will not be supplied to the hollow cover 1005 above the liquid level, thereby avoiding energy waste and being more energy-saving and environmentally friendly.

[0085] Moreover, when measuring the uniformity of the raw materials in the raw material tank 101, when the hollow cover 1005 is in contact with the material, the second rotating tube 1004 can be pushed to rotate, and at this time, the rubber ring 509 can be driven to move. At the same time, when the rubber ring 509 moves, the third connecting plate 905 can be driven to move through the second L-shaped plate 902, and the latch 906 is inserted into the second insertion hole 901. When the raw materials in the raw material tank 101 are measured to be uneven, the first motor 806 can be started, and the rotation of the first motor 806 drives the rotation of the disc 807. When the protrusion 808 is in contact with the bottom of the lifting plate 702, the lifting plate 702 can be pushed to move upward. At the same time, the third spring 804 is compressed. When the protrusion 808 passes over the bottom of the lifting plate 702, the lifting plate 702 can move downward and reset under the action of the third spring 804, and so on and so forth, so that the lifting plate 702 can drive the U-shaped plate 703 to move back and forth, thereby driving the second rotating tube 1004 to rotate back and forth through the fixed block 701, and then driving the hollow cover 1005 to rotate back and forth, which can improve the efficiency and effect of mixing, and the hollow cover 1005 above the liquid level will not rotate back and forth, avoiding energy waste, and being more energy-saving and environmentally friendly. After mixing for a period of time, the first motor 806 is stopped, and in this way, the second rotating tube 1004 and the hollow cover 1005 can rotate and reset under the action of the third spring 804, and then the uniformity of the raw materials in the raw material tank 101 is measured again. When the material is uniform, the raw material pump 105 is started to continue feeding.

[0086] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology. It will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field.

[0087] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A polyurethane foaming machine, comprising a raw material tank (101), a gas tank (102), a mixing head (103), a box (104) and a raw material pump (105), characterized in that: Also includes: A measuring mechanism is provided in each of the raw material tanks (101) and is used to measure the uniformity of the raw materials; The measuring mechanism comprises: A first rotating tube (1001) rotates at the bottom of the raw material tank (101) and is driven to rotate by a driving assembly; A plurality of mounting holes (1002) are provided on the side wall of the first rotating tube (1001), and a first sealing ring (1003) is fixedly connected in each mounting hole (1002); The second rotating tube (1004) is fixedly inserted into each first sealing ring (1003), and one end of the second rotating tube (1004) outside the first rotating tube (1001) is fixedly connected to the hollow cover (1005); A plurality of fixing plates (1006) fixed to the inner side wall of the first rotating tube (1001); A collar (1008) is rotated on the side wall of the second rotating tube (1004) and is rotatably connected to the bottom of the fixed plate (1006) via a rotating shaft (1007); a measuring assembly, disposed on top of the fixed plate (1006), for measuring the rotation of the rotating shaft (1007); A constant temperature mechanism is provided in the hollow cover (1005) and is used to control the temperature of the raw materials in the raw material tank (101); A driving mechanism, disposed in the first rotating tube (1001), for driving the second rotating tube (1004) to rotate back and forth; The measuring assembly includes a gear (216) fixedly sleeved on the side wall of the rotating shaft (1007), and the top of the fixed plate (1006) is fixedly connected to two symmetrically arranged first connecting plates (211), the side wall of the first connecting plate (211) is fixedly connected to two symmetrically arranged first guide rods (212), and the side wall of the first guide rod (212) is sleeved with a rack (213), each side wall of the first guide rod (212) is sleeved with a first spring (214), and the rack (213) is meshed with the gear (216), the top of the fixed plate (1006) is rotatably connected to the rotating plate (206) through a rotating pin (205), the top of the rotating plate (206) is provided with a first slide groove (207) and a second slide groove (209), and the rack (21 3) is fixedly connected to a first mounting plate (215) at the top, the first mounting plate (215) is fixedly connected to a first push pin (208) at the bottom, and the first push pin (208) is inserted in a first slide groove (207), the top of the fixed plate (1006) is connected to a movable plate (1009) through a movable mechanism, and the bottom of the movable plate (1009) is fixedly connected to a second push pin (210), the second push pin (210) is inserted in a second slide groove (209), and the side wall of the movable plate (1009) is connected to a detection block (1010) through a telescopic mechanism, the inner side wall of the first rotating tube (1001) is fixedly connected to a second mounting plate (1011), and the side wall of the second mounting plate (1011) is fixedly connected to a visual sensor (1012).

2. A polyurethane foaming machine according to claim 1, characterized in that: The moving mechanism comprises a support block (201) fixedly connected to the top of the fixed plate (1006), and the side wall of the support block (201) is fixedly connected to two symmetrically arranged sleeves (202), a sleeve rod (203) is inserted into the sleeve (202), and the other end of the sleeve rod (203) is fixedly connected to an L-shaped block (204), and the L-shaped block (204) is fixed to the side wall of the moving plate (1009).

3. A polyurethane foaming machine according to claim 1, characterized in that: The telescopic mechanism comprises a mounting groove (301) provided on a side wall of the movable plate (1009), and the detection block (1010) is inserted into the mounting groove (301) and connected to the side wall of the mounting groove (301) via a second spring (302); the side wall of the fixed plate (1006) is fixedly connected to an L-shaped frame (303), and the top of the L-shaped frame (303) is fixedly connected to a stopper (304); the side wall of the stopper (304) is provided with an inclined surface (305); and the side wall of the detection block (1010) is fixedly connected to a push rod (306), so that the end of the push rod (306) can slide on the inclined surface (305).

4. A polyurethane foaming machine according to claim 1, characterized in that: The constant temperature mechanism comprises a first partition (401) fixedly connected to the hollow cover (1005), and a through hole (402) is provided on the top of the first partition (401), the first partition (401) divides the interior of the hollow cover (1005) into a first chamber (403) and a second chamber (404), and a second partition (405) is fixedly connected to the second rotating tube (1004), the second partition (405) divides the interior of the second rotating tube (1004) into a third chamber (407) and a fourth chamber (406), and a liquid supply mechanism for supplying circulating liquid into the hollow cover (1005) is provided in the first rotating tube (1001).

5. A polyurethane foaming machine according to claim 4, characterized in that: The liquid supply mechanism comprises a liquid supply pipe (501) inserted into the first rotating tube (1001), and the bottom of the liquid supply pipe (501) is fixedly connected to a water pump (503), the bottom of the water pump (503) is fixedly connected to a liquid extraction pipe (504), and the bottom of the box (104) is fixedly connected to a constant temperature bath (505), the liquid extraction pipe (504) is inserted into the constant temperature bath (505), and a liquid return hole (502) is provided at the bottom of the liquid supply pipe (501), a side wall of the liquid supply pipe (501) is provided with a plurality of first jacks (511), and the second rotating tube (1004) is inserted into the first jacks (511). A second sealing ring (512) is fixedly connected to the side wall of the first jack (511), an L-shaped liquid inlet pipe (507) is fixedly connected to the side wall of the third chamber (407), and a liquid outlet pipe (506) is fixedly connected between the fourth chamber (406) and the liquid supply pipe (501), a plurality of first L-shaped plates (508) are inserted into the side wall of the liquid supply pipe (501), and the upper ends of the first L-shaped plates (508) are fixed to the side wall of the movable plate (1009), and the lower ends of the first L-shaped plates (508) are fixedly connected to a rubber ring (509), and the side wall of the rubber ring (509) is provided with a rounded corner (510).

6. A polyurethane foaming machine according to claim 5, characterized in that: The driving mechanism comprises a fixed block (701) fixedly connected to the side wall of each second rotating tube (1004), and the side wall of the liquid supply tube (501) is connected to a plurality of lifting plates (702) via a lifting mechanism, the side wall of the lifting plate (702) is fixedly connected to a U-shaped plate (703), and the fixed block (701) is inserted into the U-shaped plate (703), and a connecting mechanism is provided between two adjacent lifting plates (702).

7. A polyurethane foaming machine according to claim 6, characterized in that: The lifting mechanism comprises a support plate (805) fixedly connected to the side wall of the liquid supply pipe (501), and the side wall of the support plate (805) is fixedly connected to a first motor (806), the output end of the first motor (806) is fixedly connected to a disk (807), and the side wall of the disk (807) is fixedly connected to a plurality of array-arranged protrusions (808), the side wall of the liquid supply pipe (501) is fixedly connected to two symmetrically arranged second connecting plates (801), and the opposite side walls of the two second connecting plates (801) are fixedly connected to two symmetrically arranged second guide rods (802), the side wall of each second guide rod (802) is sleeved with a slider (803), the slider (803) is fixed to the side wall of the U-shaped plate (703), and the side wall of each second guide rod (802) is sleeved with a third spring (804).

8. The polyurethane foaming machine according to claim 6, characterized in that: The connecting mechanism includes a second jack (901) provided on the side wall of the lifting plate (702), and a second L-shaped plate (902) is inserted into the side wall of the liquid supply pipe (501), the upper end of the second L-shaped plate (902) is fixed to the side wall of the rubber ring (509), and two moving rods (903) are inserted into the bottom of the second L-shaped plate (902), both ends of the moving rods (903) are fixedly connected to mounting blocks (904), the side wall of the mounting block (904) is fixedly connected to a third connecting plate (905), and a latch (906) is inserted into the side wall of the third connecting plate (905); The driving assembly comprises a driven bevel gear (601) fixedly sleeved on the side wall of the first rotating tube (1001), and two second motors (602) are fixedly connected to the bottom of the box (104), the output end of the second motor (602) is fixedly connected to a connecting shaft (603), and a driving bevel gear (604) is fixedly sleeved on the side wall of the connecting shaft (603), and the driving bevel gear (604) is meshed with the driven bevel gear (601).

9. A process for producing a washable slow-rebound pillow core, characterized by: The following steps are involved: S1: Raw material preparation: polyether polyol, isocyanate, catalyst, foaming agent and cell opener are mixed according to weight ratio; S2: Dynamic mixing: The raw materials are fully mixed in a high-speed rotating mixing head (103) using the polyurethane foaming machine according to any one of claims 1 to 8; S3: Mold injection: The mixed raw materials are injected into a mold equipped with a heating device, and the mold temperature is controlled at 40-60°C; S4: Curing and molding: Maintaining the pressure at 1.2-1.5 MPa for 15-20 minutes to form a slow-rebound foam; S5: Water washing: Soak the formed pillow core in deionized water at 50-60°C for 30-45 minutes, and then perform high-pressure spray cleaning; S6: Vacuum drying: Dry at 60-70°C for 2-3 hours under a vacuum degree of -0.08 to -0.1 MPa.

Images