High-efficiency foaming machine and method for preparing camellia oil polyurethane sponge product

Abstract

The invention relates to a high-efficiency foaming machine and a method for preparing a camellia oil polyurethane sponge product, belonging to the field of foaming technology. The machine comprises an opening and forming trough system, a material distribution transfer system, a material distribution main stirring system and a material distribution pre-stirring system. The material distribution transfer system is slidably installed above the opening and forming trough system. The material distribution main stirring system and the material distribution pre-stirring system are both installed on the material distribution transfer system. The material distribution pre-stirring system comprises a pre-stirring box, a PVC barrel bag, a bag bottom closing device, a scraper device and a scraper lifting device. The pre-stirring box is installed on the material distribution transfer system, the PVC barrel bag is installed in the pre-stirring box, scraper grooves are arranged on two opposite sides of the pre-stirring box, the scraper device comprises two scraper plates, each scraper plate slides along the scraper groove respectively, each scraper plate is respectively located on both sides of the PVC barrel bag, a discharge slot is arranged at the bottom of the pre-stirring box, a bag bottom closing device is installed on the discharge slot, and the scraper lifting devices are respectively connected to the scraper plates in a transmission manner, thereby ensuring accurate weighing.

Description

Technical Field

[0001] The invention relates to the technical field of foaming, in particular to a high-efficiency foaming machine and a method for preparing a camellia oil polyurethane sponge product. Background Art

[0002] Polyurethane sponge is made of isocyanate and polyether as the main raw materials. It is mixed by special equipment under the action of various additives such as foaming agent, catalyst, flame retardant, and then formed in a molding tank.

[0003] The main function of polyurethane sponge is cushioning. Polyurethane sponge is commonly used in sofa furniture, pillows, cushions, toys, clothing and sound insulation lining.

[0004] The existing polyurethane foaming equipment needs to weigh the raw materials in a small bucket first. However, during the pouring process, the raw materials are viscous and difficult to pour out cleanly. Often, several hundred grams of materials are still stuck to the small bucket, resulting in inaccurate weighing. Summary of the invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides a high-efficiency foaming machine to ensure accurate weighing.

[0006] The technical solution adopted by the present invention is:

[0007] The high-efficiency foaming machine comprises an opening and synthesis molding trough system, a material distribution transfer system, a material distribution main stirring system and a material distribution pre-stirring system. The material distribution transfer system is slidably mounted above the opening and synthesis molding trough system. The material distribution main stirring system is mounted on the material distribution transfer system. The material distribution pre-stirring system is also mounted on the material distribution transfer system and is located above the material distribution main stirring system. The material distribution pre-stirring system comprises a pre-stirring box, a PVC tube bag, a bag bottom sealing device, a scraping device and a scraping lifting device. The pre-stirring box is mounted on the material distribution On the transfer system, the PVC tube bag is installed in the pre-mixing box, and Y-shaped grooves are provided on the two opposite sides of the pre-mixing box. The Y-shaped grooves include two clamping grooves and a scraper groove. The scraper device includes two scraper plates, and each scraper plate slides along the corresponding clamping groove respectively. After the two scraper plates are assembled, they slide along the scraper groove. Each scraper plate is located on both sides of the PVC tube bag respectively. A discharge gap is provided at the bottom of the pre-mixing box, and the bag bottom closing device is installed on the discharge gap. The scraper lifting device is respectively connected to the scraper plate in terms of transmission.

[0008] Preferably, the opening and closing molding trough system comprises a trough body and an opening and closing door, wherein the opening and closing door is rotatably mounted on the trough body, and the opening and closing door and the trough body enclose a molding space.

[0009] Preferably, the cloth transfer system includes a cloth transfer vehicle and a cloth lifting device, the cloth lifting device includes a lifting guide frame, a lifting plate and a lifting cylinder, the lifting guide frame is installed on the cloth transfer vehicle, the lifting cylinder is installed between the lifting guide frame and the lifting plate, the lifting plate slides up and down along the lifting guide frame, and the cloth main stirring system is installed at the bottom of the lifting plate.

[0010] Preferably, the main stirring system for distributing the material comprises a stirring motor and a main stirring barrel, both of which are mounted on the material transfer system, and a stirring paddle extending into the main stirring barrel is mounted at the end of the stirring motor.

[0011] Preferably, the bag bottom sealing device comprises two sealing slide plates, and each of the sealing slide plates slides along the bottom of the pre-mixing box at both ends of the discharge seam.

[0012] Preferably, each of the scraper plates is provided with pre-tightening magnets that attract each other, and each of the scraper plates is provided with counterweights at both ends.

[0013] Preferably, the scraper lifting device includes a lifting motor and two winding rollers, the lifting motor is respectively connected to the two winding rollers, the two winding rollers rotate synchronously, and the winding rollers are connected to the corresponding scraper plates through a traction rope.

[0014] The method for preparing a camellia oil polyurethane sponge product using the high-efficiency foaming machine comprises the following steps:

[0015] Step 1: Preparation of camellia oil polyol:

[0016] According to the mass ratio, camellia oil: small molecule alcohol: acid catalyst = 100:5-7:2 are mixed and heated for esterification reaction to obtain camellia oil polyol, and then the pH value is adjusted to 6.7-7.5, filtered, and dehydrated at a temperature of 105-110° C. and a vacuum degree of 130 Pa to obtain camellia oil polyol;

[0017] Step 2, preparing modified MDI;

[0018] According to the weight percentage, 100 parts of camellia oil polyol obtained in step 1 and 130 parts of 4,4'-diphenylmethane diisocyanate were polymerized to obtain a prepolymer with an NCO% of 15%;

[0019] According to the mass ratio, the obtained prepolymer with NCO% of 15%: 4,4'-diphenylmethane diisocyanate: 2,4'-diphenylmethane diisocyanate: polymerized MDI = 20~25:20~30:20~30:25~35 is mixed to obtain modified MDI with NCO% of 25.5~26.5%;

[0020] Step 3: Prepare camellia oil memory foam:

[0021] According to the weight percentage, 60-85 parts of glycerol-started polyether polyol with a molecular weight of 4000, 5-15 parts of glycerol-started propylene oxide polyether polyol with a molecular weight of 500 and 10-35 parts of camellia oil polyol are put into a PVC barrel bag for stirring, the bag bottom sealing device opens the discharge slit, the scraper lifting device lowers the scraper plate, each of the scraper plates slides along the corresponding clamping groove respectively, and the two scraper plates are assembled and slide along the scraper groove to squeeze the material out of the discharge slit, and then the scraper lifting device lifts the scraper plate to the highest position, and 2-3 .5 parts of silicone foam stabilizer, 0.2-0.6 parts of triethylenediamine, 2-4 parts of water and 30-60 parts of modified MDI obtained in step 2 are put into a PVC tube bag for stirring, the bag bottom closing device opens the discharge slit, the scraper lifting device lowers the scraper plate, each scraper plate slides along the corresponding clamping groove respectively, and the two scraper plates are assembled and slide along the scraper groove to squeeze the material out of the discharge slit, then the scraper lifting device lifts the scraper plate to the highest position, and the main stirring system of the cloth mixes and foams at high speed to obtain a camellia oil polyurethane sponge product.

[0022] Furthermore, the acid catalyst in step 1 is boron trifluoride or hydrochloric acid;

[0023] The heating temperature is 120°C and the esterification reaction time is 4h;

[0024] Preferably, a molecular sieve is added during the esterification reaction to adsorb water generated during the reaction, the molecular sieve is zeolite, and the mass ratio of the zeolite to the camellia oil is 1:50;

[0025] The polymerization temperature in step 2 is 90°C;

[0026] The rotation speed of the main stirring system for high-speed mixing and foaming of the cloth is 3000-5000 rpm, and the temperature of the high-speed mixing and foaming is 20-28°C.

[0027] The beneficial effects of the present invention are:

[0028] The material distribution transfer system is slidably installed above the opening and synthesis molding trough system, and the material distribution main mixing system is installed on the material distribution transfer system. The material distribution transfer system is used to transfer the main mixing system, so that the main mixing system is transferred to the opening and synthesis molding trough system after the materials are prepared, and after the main mixing system is distributed in the opening and synthesis molding trough system, the main mixing system is transferred out of the opening and synthesis molding trough system. The material distribution pre-mixing system is also installed on the material distribution transfer system and is located above the main mixing system for mixing various component materials.

[0029] Specifically, the material pre-mixing system includes a pre-mixing box, a PVC tube bag, a bag bottom closing device, a scraper device and a scraper lifting device. The pre-mixing box is installed on the material transfer system, and the PVC tube bag is installed in the pre-mixing box. Y-shaped grooves are provided on the two opposite sides of the pre-mixing box, and the Y-shaped grooves include two clamping grooves and a scraper groove. The scraper device includes two scraper plates, each scraper plate slides along the corresponding clamping groove respectively, and the two scraper plates slide along the scraper groove after being assembled. Each scraper plate is located on both sides of the PVC tube bag. A discharge gap is provided at the bottom of the pre-mixing box, and the bag bottom closing device is installed on the discharge gap to close the discharge gap when the pre-mixing box is batched. Before the pre-mixing box is batched, the PVC tube bag is first put into the pre-mixing box, and the PVC tube bag passes through the two scraper plates and the discharge gap in turn, and the scraper lifting device is installed on the bottom of the pre-mixing box. The devices are respectively connected to the scraper plates for transmission. During batching, the bag bottom sealing device seals the discharge slit, and each material is weighed in turn and poured into the PVC tube bag in the pre-mixing box, and stirred with a hand-held mixer. Since there is no foaming reaction in the pre-mixing box, the hand-held mixer can be used to slowly stir. After stirring, the bag bottom sealing device opens the discharge slit, the scraper lifting device is relaxed, and the scraper plates descend along the corresponding Y-shaped grooves under the action of gravity until the two scraper plates are assembled and descended in the scraper groove, so that the materials in the PVC tube bag are forced to be squeezed out from the discharge slit into the main mixing system of the material distribution, ensuring accurate weighing. After the materials other than the foaming agent are weighed in the pre-mixing system of the material distribution in turn, the foaming agent is added to the main mixing system of the material distribution for foaming. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention.

[0031] Figure 2 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0032] Figure 3 for Figure 1 A in the middle is a schematic diagram of the structure after the PVC tube bag is installed.

[0033] Description of reference numerals:

[0034] 1. Open and synthesize the molding groove system;

[0035] 2. Fabric transfer system; 21. Fabric transfer vehicle; 22. Fabric lifting device; 221. Lifting guide frame; 222. Lifting plate; 223. Lifting cylinder;

[0036] 3. Main mixing system for fabrics; 31. Main mixing barrel; 32. Mixing motor;

[0037] 4. Fabric pre-mixing system; 41. Pre-mixing box; 411. Y-shaped groove; 4111. Clamping groove; 4112. Scraping groove; 4113. Discharging slit; 42. PVC tube bag; 43. Bag bottom closing device; 44. Scraping device; 45. Scraping lifting device; 451. Lifting motor; 452. Winding roller; 453. Traction rope. DETAILED DESCRIPTION

[0038] The raw materials used in the present invention are all commercially available:

[0039] The polymeric MDI was Huntsman suprasec 5005;

[0040] The organosilicon foam stabilizer may be organosilicon foam stabilizer Momentive L-580, or organosilicon foam stabilizer Evonik B-8110;

[0041] The molecular weight of the glycerol-started polyether polyol is 4000, which is a polyether triol with a molecular weight of 4000 and a mixture of propylene oxide and ethylene oxide (ethylene oxide 70-80%).

[0042] The present invention will be further described below in conjunction with the accompanying drawings: Example 1

[0043] like Figure 1 — Figure 3 As shown, this embodiment provides a high-efficiency foaming machine, including an opening and synthesis molding trough system 1, a material distribution transfer system 2, a material distribution main stirring system 3 and a material distribution pre-stirring system 4, the material distribution transfer system 2 is slidably installed above the opening and synthesis molding trough system 1, the material distribution main stirring system 3 is installed on the material distribution transfer system 2, the material distribution transfer system 2 is used to transfer the material distribution main stirring system 3, so that after the materials are prepared, the material distribution main stirring system 3 is transferred to the opening and synthesis molding trough system 1, and after the material distribution main stirring system 3 is distributed in the opening and synthesis molding trough system 1, the material distribution main stirring system 3 is transferred out of the opening and synthesis molding trough system 1, and the material distribution pre-stirring system 4 is also installed on the material distribution transfer system 2 and the material distribution pre-stirring system 4 is located above the main stirring system 3, and is used to stir various component materials.

[0044] Specifically, the material premixing system 4 includes a premixing box 41, a PVC tube bag 42, a bag bottom closing device 43, a scraping device 44 and a scraping lifting device 45. The premixing box 41 is installed on the material transfer system 2, and the PVC tube bag 42 is installed in the premixing box 41. The two opposite sides of the premixing box 41 are provided with Y-shaped grooves 411. The Y-shaped grooves 411 include two clamping grooves 4111 and a scraping groove 4112. The scraping device 44 includes two scraping plates. Each scraper plate slides along the corresponding clamping groove 4111 respectively, and the two scraper plates slide along the scraper groove 4112 after being assembled. Each scraper plate is located on both sides of the PVC tube bag 42 respectively. A discharge slit 4113 is provided at the bottom of the pre-mixing box 41. The bag bottom closing device 43 is installed on the discharge slit 4113 to close the discharge slit 4113 when the pre-mixing box 41 is batched. Before the pre-mixing box 41 is batched, the PVC tube bag 42 is first put into the pre-mixing box 41, and the PVC tube bag 42 is sequentially passed through The scraper lifting device 45 is respectively connected to the scraper plates through two scraper plates and the discharge slit 4113. When mixing, the bag bottom closing device 43 closes the discharge slit 4113, and each material is weighed in turn and poured into the PVC tube bag 42 in the pre-mixing box 41, and stirred with a hand-held mixer. Since there is no foaming reaction in the pre-mixing box 41, the hand-held mixer can be used to slowly stir. After stirring, the bag bottom closing device 43 opens the discharge slit 4113, and the scraper lifting device 45 is relaxed. The scraper plates descend along the corresponding Y-shaped grooves 411 under the action of gravity until the two scraper plates are combined and descended in the scraper groove 4112, so that the materials in the PVC tube bag 42 are forced to be squeezed out from the discharge slit 4113 into the main mixing system 3 for distributing the materials, ensuring accurate weighing. After the other materials except the foaming agent are weighed in the pre-mixing system 4 for distributing the materials in turn, the foaming agent is added to the main mixing system 3 for foaming.

[0045] Specifically, the opening and closing molding trough system 1 includes a trough body and an opening and closing door. The opening and closing door is rotatably installed on the trough body. The opening and closing door and the trough body enclose a molding space. The opening and closing door is opened to facilitate the material distribution transfer system 2 to transfer the main material distribution stirring system 3 away, and then the opening and closing door is closed to allow the material to foam in the trough body. It is worth noting that the main material distribution stirring system 3 is moved out of the opening and closing door position under the drive of the material distribution transfer system 2. When the opening and closing door is opened, the height of the trough body on the lower side of the opening and closing door shall not be less than 30 centimeters, so as to avoid material leakage when the opening and closing door is opened. As the foaming proceeds, the opening and closing door is closed.

[0046] Specifically, the cloth transfer system 2 includes a cloth transfer vehicle 21 and a cloth lifting device 22. The cloth lifting device 22 includes a lifting guide frame 221, a lifting plate 222 and a lifting cylinder 223. The lifting guide frame 221 is installed on the cloth transfer vehicle 21, and the lifting cylinder 223 is installed between the lifting guide frame 221 and the lifting plate 222. The lifting plate 222 slides up and down along the lifting guide frame 221. The lifting cylinder 223 is used to push the lifting plate 222 to move up and down. The main cloth stirring system 3 is installed at the bottom of the lifting plate 222 and then follows the lifting of the lifting plate 222. The descent of the main cloth stirring system 3 makes the main cloth stirring system 3 closer to the bottom of the tank body when the bottom is opened for cloth spreading to prevent material splashing. The rise of the main cloth stirring system 3 is to avoid the tank body and provide space for foaming.

[0047] Specifically, the main stirring system 3 for distributing the material includes a stirring motor 32 and a main stirring barrel 31, both of which are installed on the material transfer system 2. A stirring paddle extending into the main stirring barrel 31 is installed at the end of the stirring motor 32, so as to achieve rapid stirring after the foaming agent is added. An opening and closing plate is provided at the bottom of the main stirring barrel 31, and when the opening and closing plate is opened, the material flows into the opening and closing molding trough system 1.

[0048] Specifically, the bag bottom closing device 43 includes two closing slides, each of which slides along the bottom of the pre-mixing box 41 at both ends of the discharge gap 4113. When the ingredients are mixed, the two closing slides are closed to close the discharge gap 4113. After the ingredients are weighed, the closing slides are opened. Specifically, the closing slides are controlled by a cylinder to open and close. This is a prior art and will not be described in detail here.

[0049] Specifically, each scraper board is equipped with mutually attracting pre-tightening magnets to enable the two scraper boards to clamp the PVC tube bag 42. Counterweights are provided on both ends of each scraper board to ensure the scraper board falls.

[0050] Specifically, the scraper lifting device 45 includes a lifting motor 451 and two winding rollers 452. The lifting motor 451 is respectively connected to the two winding rollers 452, and the two winding rollers 452 rotate synchronously. Each winding roller 452 is connected to the corresponding scraper plate through a traction rope 453. Each winding roller 452 drives the scraper plate to rise and fall through the traction rope 453. It is worth noting that in order to ensure that the traction rope 453 can smoothly pull each scraper plate from the scraper groove 4112 upward into the clamping groove 4111, the traction rope 453 is installed at the upper side of the corresponding scraper plate. Example 2

[0051] The method for preparing a camellia oil polyurethane sponge product using the high-efficiency foaming machine in Example 1 comprises the following steps:

[0052] Step 1: Preparation of camellia oil polyol:

[0053] Camellia oil: small molecule alcohol: acid catalyst = 100:5:2 according to the mass ratio, and then heated to perform esterification reaction to obtain camellia oil polyol, and then adjusted the pH value to 6.7, filtered, and dehydrated at a temperature of 105° C. and a vacuum degree of 130 Pa to obtain camellia oil polyol;

[0054] Wherein, the acid catalyst is boron trifluoride;

[0055] The small molecule alcohol is ethylene glycol, and the mass ratio of the small molecule alcohol to camellia oil is 1:20;

[0056] The heating temperature is 120°C and the esterification reaction time is 4h;

[0057] During the esterification reaction, a molecular sieve is added to absorb water generated during the reaction, wherein the molecular sieve is zeolite, and the mass ratio of the zeolite to the camellia oil is 1:50;

[0058] Step 2, preparing modified MDI;

[0059] According to the weight percentage, 100 parts of camellia oil polyol obtained in step 1 and 130 parts of 4,4'-diphenylmethane diisocyanate were polymerized to obtain a prepolymer with an NCO% of 15%. The polymerization temperature was 90°C.

[0060] According to the mass ratio, the obtained prepolymer with NCO% of 15%: 4,4'-diphenylmethane diisocyanate: 2,4'-diphenylmethane diisocyanate: polymerized MDI = 20:20:20:25 was mixed to obtain modified MDI with NCO% of 25.5;

[0061] Step 3: Prepare camellia oil memory foam:

[0062] According to the weight percentage, 60 parts of glycerol-based polyether polyol with a molecular weight of 4000, 5 parts of glycerol-based propylene oxide polyether polyol with a molecular weight of 500 and 10 parts of camellia oil polyol were put into a PVC tube bag for stirring, the bag bottom sealing device opened the discharge slit, the scraper lifting device lowered the scraper plate, each of the scraper plates slid along the corresponding clamping groove respectively, and the two scraper plates were assembled and slid along the scraper groove, thereby squeezing the material out of the discharge slit, and then the scraper lifting device lifted the scraper plate to the highest position, and 2 1. 2 parts of organic silicon foam stabilizer, 0.2 parts of triethylenediamine, 2 parts of water and 30 parts of modified MDI obtained in step 2 are put into a PVC barrel bag for stirring, the bag bottom sealing device opens the discharge slit, the scraper lifting device lowers the scraper plate, each of the scraper plates slides along the corresponding clamping groove respectively, and the two scraper plates are assembled and slide along the scraper groove to squeeze the material out of the discharge slit, and then the scraper lifting device lifts the scraper plate to the highest position, and the main stirring system of the material is mixed and foamed at a high speed to obtain a camellia oil polyurethane sponge product;

[0063] The rotation speed of the high-speed mixing and foaming of the main stirring system of the cloth is 3000 rpm, and the temperature of the high-speed mixing and foaming is 20°C. Example 3

[0064] The method for preparing a camellia oil polyurethane sponge product using the high-efficiency foaming machine in Example 1 comprises the following steps:

[0065] Step 1: Preparation of camellia oil polyol:

[0066] Camellia oil: small molecule alcohol: acid catalyst = 100:7:2 are mixed and heated for esterification reaction to obtain camellia oil polyol, and then the pH value is adjusted to 7.5, filtered, and dehydrated at a temperature of 110° C. and a vacuum degree of 130 Pa to obtain camellia oil polyol;

[0067] Wherein, the acid catalyst is hydrochloric acid;

[0068] The small molecule alcohol is butanediol, and the mass ratio of the small molecule alcohol to camellia oil is 1:20;

[0069] The heating temperature is 120°C and the esterification reaction time is 4h;

[0070] During the esterification reaction, a molecular sieve is added to absorb water generated during the reaction, wherein the molecular sieve is zeolite, and the mass ratio of the zeolite to the camellia oil is 1:50;

[0071] Step 2, preparing modified MDI;

[0072] According to the weight percentage, 100 parts of camellia oil polyol obtained in step 1 and 130 parts of 4,4'-diphenylmethane diisocyanate were polymerized to obtain a prepolymer with an NCO% of 15%. The polymerization temperature was 90°C.

[0073] According to the mass ratio, the obtained prepolymer with NCO% of 15%: 4,4'-diphenylmethane diisocyanate: 2,4'-diphenylmethane diisocyanate: polymerized MDI = 25:30:30:35 was mixed to obtain modified MDI with NCO% of 26.5%;

[0074] Step 3: Prepare camellia oil memory foam:

[0075] According to the weight percentage, 85 parts of glycerol-based polyether polyol with a molecular weight of 4000, 15 parts of glycerol-based propylene oxide polyether polyol with a molecular weight of 500 and 10-35 parts of camellia oil polyol are put into a PVC tube bag for stirring. The bag bottom sealing device opens the discharge slit, and the scraper lifting device lowers the scraper plate, and each scraper plate slides along the corresponding clamping groove respectively. After the two scraper plates are assembled, they slide along the scraper groove, thereby squeezing the material out of the discharge slit. Then the scraper lifting device lifts the scraper plate to the highest position, and 3. 5 parts of organosilicon foam stabilizer, 0.6 parts of triethylenediamine, 4 parts of water and 30-60 parts of modified MDI obtained in step 2 are put into a PVC barrel bag and stirred, the bag bottom sealing device opens the discharge slit, the scraper lifting device lowers the scraper plate, each scraper plate slides along the corresponding clamping groove respectively, and the two scraper plates are assembled and slide along the scraper groove to squeeze the material out of the discharge slit, and then the scraper lifting device lifts the scraper plate to the highest position, and the main stirring system of the material is mixed and foamed at a high speed to obtain a camellia oil polyurethane sponge product;

[0076] The rotation speed of the high-speed mixing and foaming of the main stirring system of the cloth is 5000 rpm, and the temperature of the high-speed mixing and foaming is 28°C.

[0077] In the above embodiment, the small molecule alcohol may also be propylene glycol, and the mass ratio of the small molecule alcohol to camellia oil is 1:20.

[0078] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. High-efficiency foaming machine, characterized in that: The invention comprises an opening and forming trough system, a material distribution transfer system, a material distribution main mixing system and a material distribution pre-mixing system, wherein the material distribution transfer system is slidably installed above the opening and forming trough system, the material distribution main mixing system is installed on the material distribution transfer system, the material distribution pre-mixing system is also installed on the material distribution transfer system and is located above the material distribution main mixing system, the material distribution pre-mixing system comprises a pre-mixing box, a PVC tube bag, a bag bottom closing device, a scraping device and a scraping lifting device, the pre-mixing box is installed on the material distribution transfer system, the PVC tube bag is installed in the pre-mixing box, two opposite sides of the pre-mixing box are provided with Y-shaped grooves, the Y-shaped grooves each comprise two clamping grooves and a scraping groove, the scraping device comprises two scraping plates, each of the scraping plates slides along the corresponding clamping groove respectively, and the two scraping plates slide along the scraping groove after being assembled, and each of the scraping plates is located at both sides of the PVC tube bag respectively, a discharging slit is provided at the bottom of the pre-mixing box, the bag bottom closing device is installed on the discharging slit, and the scraping lifting devices are respectively connected to the scraping plates in a transmission manner.

2. The high-efficiency foaming machine according to claim 1, characterized in that: The opening and closing molding trough system comprises a trough body and an opening and closing door. The opening and closing door is rotatably mounted on the trough body. The opening and closing door and the trough body enclose a molding space.

3. The high-efficiency foaming machine according to claim 1, characterized in that: The material transfer system includes a material transfer vehicle and a material lifting device, the material lifting device includes a lifting guide frame, a lifting plate and a lifting cylinder, the lifting guide frame is installed on the material transfer vehicle, the lifting cylinder is installed between the lifting guide frame and the lifting plate, the lifting plate slides up and down along the lifting guide frame, and the material main stirring system is installed at the bottom of the lifting plate.

4. The high-efficiency foaming machine according to claim 1, characterized in that: The main stirring system for distributing the material comprises a stirring motor and a main stirring barrel, both of which are mounted on the material transfer system, and a stirring paddle extending into the main stirring barrel is mounted at the end of the stirring motor.

5. The high-efficiency foaming machine according to claim 1, characterized in that: The bag bottom closing device comprises two closing slide plates, and each of the closing slide plates slides along the bottom of the pre-mixing box at both ends of the discharge seam.

6. The high-efficiency foaming machine according to claim 1, characterized in that: Each of the scraper plates is provided with pre-tightening magnets that attract each other, and both ends of each of the scraper plates are provided with counterweights.

7. The high-efficiency foaming machine according to claim 1, characterized in that: The scraper lifting device comprises a lifting motor and two winding rollers. The lifting motor is respectively connected to the two winding rollers in a transmission manner. The two winding rollers rotate synchronously. The winding rollers are connected to the corresponding scraper plates in a transmission manner through traction ropes.

8. A method for preparing a camellia oil polyurethane sponge product using the high-efficiency foaming machine according to claim 1, characterized in that: The steps include: Step 1: Preparation of camellia oil polyol: According to the mass ratio, camellia oil: small molecule alcohol: acid catalyst = 100:5-7:2 are mixed and heated for esterification reaction to obtain camellia oil polyol, and then the pH value is adjusted to 6.7-7.5, filtered, and dehydrated at a temperature of 105-110° C. and a vacuum degree of 130 Pa to obtain camellia oil polyol; Step 2, preparing modified MDI; According to the weight percentage, 100 parts of camellia oil polyol obtained in step 1 and 130 parts of 4,4'-diphenylmethane diisocyanate were polymerized to obtain a prepolymer with an NCO% of 15%; According to the mass ratio, the obtained prepolymer with NCO% of 15%: 4,4'-diphenylmethane diisocyanate: 2,4'-diphenylmethane diisocyanate: polymerized MDI = 20~25:20~30:20~30:25~35 is mixed to obtain modified MDI with NCO% of 25.5~26.5%; Step 3: Prepare camellia oil memory foam: According to the weight percentage, 60-85 parts of glycerol-started polyether polyol with a molecular weight of 4000, 5-15 parts of glycerol-started propylene oxide polyether polyol with a molecular weight of 500 and 10-35 parts of camellia oil polyol are put into a PVC barrel bag for stirring, the bag bottom sealing device opens the discharge slit, the scraper lifting device lowers the scraper plate, each of the scraper plates slides along the corresponding clamping groove respectively, and the two scraper plates are assembled and slide along the scraper groove to squeeze the material out of the discharge slit, and then the scraper lifting device lifts the scraper plate to the highest position, and 2-3 .5 parts of silicone foam stabilizer, 0.2-0.6 parts of triethylenediamine, 2-4 parts of water and 30-60 parts of modified MDI obtained in step 2 are put into a PVC tube bag for stirring, the bag bottom closing device opens the discharge slit, the scraper lifting device lowers the scraper plate, each scraper plate slides along the corresponding clamping groove respectively, and the two scraper plates are assembled and slide along the scraper groove to squeeze the material out of the discharge slit, and then the scraper lifting device lifts the scraper plate to the highest position, and the main stirring system of the cloth mixes and foams at a high speed to obtain a camellia oil polyurethane sponge product.

9. The method for preparing a camellia oil polyurethane sponge product according to claim 8, characterized in that: The acid catalyst in step 1 is boron trifluoride or hydrochloric acid; The small molecule alcohol is one of ethylene glycol, propylene glycol or butanediol; The heating temperature is 120°C and the esterification reaction time is 4h; During the esterification reaction, a molecular sieve is added to adsorb water generated during the reaction; The polymerization temperature in step 2 is 90°C; The rotation speed of the main stirring system for high-speed mixing and foaming of the cloth is 3000-5000 rpm, and the temperature of the high-speed mixing and foaming is 20-28°C.

10. The method for preparing a camellia oil polyurethane sponge product according to claim 9, characterized in that: The molecular sieve is zeolite, and the mass ratio of the zeolite to the camellia oil is 1:50.

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