Device and method for preparing high-strength cast nylon product

Abstract

The invention belongs to the field of high polymer material forming, and particularly relates to a device for preparing a high-strength cast nylon product, which comprises a base, a water conveying pipe, a water inlet pipe, a water outlet pipe, a first fixing plate, an air guide cylinder and a bearing fan, heat on the surface of the mold vertical plate can be quickly absorbed according to the water evaporation heat absorption principle, so that the temperature of the mold vertical plate is reduced, and the problems that internal stress is generated due to overlarge temperature gradient in the cooling process of a cast nylon product, and the nylon product is deformed, cracked and the like in the subsequent processing or using process due to the internal stress in the nylon product are solved; and meanwhile, the water vapor can uniformly cover the surface of the mold vertical plate, uniform cooling is achieved, a more compact structure can be formed in the cooling process of the cast nylon product through the proper cooling speed and the uniform cooling condition, the crystallinity and mechanical property of the cast nylon product are improved, and the strength and durability of the product are improved.

Description

Technical Field

[0001] The invention belongs to the field of polymer material molding, and specifically relates to a device and a method for preparing high-strength cast nylon products. Background Art

[0002] Nylon products refer to various products made of nylon material (also known as polyamide or PA). Nylon is a synthetic polymer with excellent mechanical strength, wear resistance, chemical corrosion resistance, fatigue resistance and good resilience. These characteristics make nylon widely used in many industrial fields, thus deriving a variety of nylon products.

[0003] In the prior art, in order to obtain nylon products, the caprolactam monomer, which is the main raw material of cast nylon, must first be heated to a molten state, and then a catalyst and a co-catalyst are added to the molten caprolactam monomer and stirred evenly, and then the mixed caprolactam monomer is dehydrated and cast into a preheated mold. After the mold is cooled, the solidified nylon product can be demoulded and taken out.

[0004] After long-term use and observation, it was found that during the cooling and solidification process of caprolactam monomer in the mold, appropriate cooling speed and uniform cooling conditions can make the nylon product form a denser structure, which can improve the strength and durability of the product.

[0005] To this end, the present invention provides a device and a method for preparing high-strength cast nylon products. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a device for preparing high-strength cast nylon products described in the present invention comprises a base, a plurality of vertical rods are fixedly connected to the top side wall of the base, a plurality of grooves are opened on the top side wall of the base, a lower mold seat is fixedly connected to the top side wall of the base, the lower mold seat is arranged between the plurality of grooves, a plurality of mold vertical plates are slidably connected to the middle of the inner side wall of the groove, the mold vertical plates and the lower mold seat are arranged correspondingly, a buckling component is provided in the middle of the side wall of the mold vertical plate, a plurality of the mold vertical plates and the lower mold seat are buckled into a whole, a moving component is provided in the middle of the side wall of the mold vertical plate, a water pipe is fixedly connected to the middle of the side wall of the vertical rod, a water inlet pipe is fixedly connected to the middle of the side wall of the water pipe, a plurality of water outlet pipes are fixedly connected to the middle of the side wall of the water pipe, the water pipe, the water inlet pipe and the water outlet pipe are all hollow and connected, and a first fixed component is fixedly connected to the middle of the side wall of the vertical rod The plate has a plurality of air guide tubes fixedly connected to the middle of the side wall of the first fixed plate, a bearing fan fixedly connected to the middle of the inner wall of the air guide tube, and the bearing fan is arranged above the water outlet pipe. In this step, a water supply pipe, a water inlet pipe, a water outlet pipe, the first fixed plate, the air guide tube and the bearing fan are arranged, which can quickly absorb the heat on the surface of the mold vertical plate through the principle of water evaporation and heat absorption, thereby reducing the temperature of the mold vertical plate and avoiding the cast nylon product from generating internal stress due to excessive temperature gradient during the cooling process. The existence of internal stress in the nylon product will cause deformation, cracking and other problems during subsequent processing or use, thereby reducing its strength. At the same time, water vapor can evenly cover the surface of the mold vertical plate to achieve uniform cooling. Appropriate cooling speed and uniform cooling conditions can make the cast nylon product form a denser structure during the cooling process, improve its crystallinity and mechanical properties, and enhance the strength and durability of the product.

[0008] Preferably, the moving assembly includes a plurality of second fixed plates, the second fixed plates are fixedly connected between an adjacent pair of vertical rods, an electric push rod is provided in the middle of the side wall of the second fixed plate, a movable rod is fixedly connected to the output end of the electric push rod, the other end of the movable rod is fixedly connected to the mold vertical plate, a slot is provided in the middle of the side wall of the mold vertical plate, the inner wall of the slot is slidably connected to the mold top plate, and the plurality of mold top plates form a closed whole. In this step, by arranging the second fixed plate, the electric push rod, the movable rod, the slot and the mold top plate, the solidified cast nylon product can be smoothly separated from the mold, thereby reducing defects such as scratches and cracks on the surface of the product due to poor demolding, which affects the appearance and performance of the product, and ensuring that the product maintains a stable shape and dimensional accuracy during the demolding process, thereby improving the qualified rate of the product, and smooth demolding can ensure the continuous operation of the production line, reduce production interruptions due to demolding difficulties, and improve the stability and reliability of the production line.

[0009] Preferably, a splicing plate is fixedly connected to the top side wall of the mold top plate, and a plurality of the splicing plates form a complete cylinder. A pressing block is slidably fitted in the middle of the inner side wall of the splicing plate, and a feeding pipe is fixedly connected to the middle of the side wall of one of the splicing plates. By arranging the splicing plate, the pressing block and the feeding pipe, this step can add the molten and catalyzed caprolactam monomer to the mold when the nylon product is solidified, thereby reducing the pores and defects inside the product, thereby improving its density and overall strength. In addition, by fully filling the mold with the molten and catalyzed caprolactam monomer, the situation in which the curing effect of the nylon product is affected by insufficient raw materials during curing, thereby causing material waste.

[0010] Preferably, the snap-fit ​​assembly includes a first protrusion, which is fixedly connected to the side wall of the mold vertical plate, and a first groove is opened in the middle of the side wall of the mold vertical plate, and the first protrusion and the first groove are arranged correspondingly, and a second protrusion is fixedly connected to the middle of the side wall of the mold top plate, and a second groove is opened in the middle of the side wall of the mold top plate, and the second protrusion and the second groove are arranged correspondingly. In this step, by arranging the first protrusion, the first groove, the second protrusion and the second groove, the mutual engagement of the concave and convex parts can achieve a stable connection between the mold vertical plates and the mold top plate, thereby reducing the displacement or deformation of the mold caused by loosening or failure of the fixation between the lower mold base, the mold vertical plate and the mold top plate.

[0011] Preferably, a plurality of clips are fixedly connected to the middle portion of the side wall of the mold upright plate, and a plurality of limit rods are fixedly connected to the middle portion of the side wall of the mold upright plate, and the clips and limit rods are arranged correspondingly. In this step, by arranging the clips and limit rods, the position of the mold upright plate can be fixed from the outside, thereby ensuring that the mold upright plate maintains a stable position during the casting process, reducing defects such as cracks, pores, and shrinkage holes in the nylon product caused by the movement of the mold upright plate, and externally locking the mold upright plate can increase the overall rigidity of the mold, making it less likely to deform when subjected to internal pressure, thereby ensuring the dimensional accuracy and shape stability of the nylon product.

[0012] Preferably, a streamer is fixedly connected to the middle part of the side wall of the water outlet pipe, and the streamer is made of elastic material. By arranging the streamer in this step, the liquid dripping from the surface of the water outlet pipe can be fully utilized. When the streamer swings with the wind direction, the absorbed liquid will be thrown to the surface of the mold vertical plate, so that the liquid contacts the mold vertical plate, and when the liquid is dried by the bearing fan, the heat on the surface of the mold vertical plate is absorbed, which not only reduces the waste of water resources but also further improves the cooling efficiency of the curing of nylon products.

[0013] Preferably, a handle is fixedly connected to the top side wall of the mold top plate, and a plurality of the handles are staggered. This step enables the staff to easily and quickly open and close the mold top plate by setting a handle on the top of the mold top plate, provides an intuitive gripping point, and reduces inconvenience during use.

[0014] Preferably, a sealing gasket is fixedly connected to the middle part of the side wall of the second protrusion, and the sealing gasket is made of elastic material. By arranging the sealing gasket on the side wall of the second protrusion in this step, it can be ensured that the mold always maintains a good sealing effect during the casting process, ensures the stability of the internal environment of the mold, avoids the contamination of the nylon product by the medium, and ensures the smooth progress of the production process.

[0015] The present invention discloses a method for preparing a high-strength cast nylon product, which is applicable to the above-mentioned device for preparing a high-strength cast nylon product. The specific steps of the method are as follows:

[0016] S1: Select caprolactam monomer as the main raw material of cast nylon, ensure its purity and quality meet the requirements, select sodium hydroxide as a catalyst to initiate the anionic polymerization reaction of caprolactam, and select triphenylmethane triisocyanate as a co-catalyst to accelerate the polymerization reaction.

[0017] S2: Start heating the caprolactam monomer at 90°C until the temperature rises to 135°C to melt it.

[0018] S3: Add sodium hydroxide as catalyst and triphenylmethane triisocyanate as co-catalyst to the molten caprolactam monomer and stir evenly. The amount of catalyst and co-catalyst added needs to be adjusted according to the specific formula and process requirements.

[0019] S4: After adding the catalyst and the co-catalyst, the molten caprolactam monomer is subjected to vacuum dehydration treatment to reduce its moisture content.

[0020] S5: The dehydrated molten caprolactam monomer is quickly cast into a mold preheated to 160°C. In the mold, the caprolactam monomer undergoes a rapid polymerization reaction under the action of the catalyst and the co-catalyst.

[0021] S6: After the polymerization reaction is completed, the mold is cooled to room temperature and the solidified nylon product is removed from the mold.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The device for preparing high-strength cast nylon products described in the present invention is provided with a water pipe, a water inlet pipe, a water outlet pipe, a first fixed plate, an air guide tube and a bearing fan. The heat on the surface of the mold vertical plate can be quickly absorbed through the water evaporation heat absorption principle, thereby reducing the temperature of the mold vertical plate and avoiding the cast nylon product from generating internal stress due to excessive temperature gradient during the cooling process. The existence of internal stress in the nylon product will cause deformation, cracking and other problems during subsequent processing or use, thereby reducing its strength. At the same time, water vapor can evenly cover the surface of the mold vertical plate to achieve uniform cooling. Appropriate cooling speed and uniform cooling conditions can enable the cast nylon product to form a denser structure during the cooling process, improve its crystallinity and mechanical properties, and enhance the strength and durability of the product.

[0024] 2. The device for preparing high-strength cast nylon products described in the present invention can smoothly separate the solidified cast nylon products from the mold by arranging a second fixed plate, an electric push rod, a movable rod, a notch and a mold top plate, thereby reducing scratches, cracks and other defects on the surface of the product due to poor demolding, which affects the appearance and performance of the product, ensures that the product maintains a stable shape and dimensional accuracy during the demolding process, improves the product qualification rate, and smooth demolding can ensure the continuous operation of the production line, reduce production interruptions caused by demolding difficulties, and improve the stability and reliability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 is a stereogram of the present invention;

[0027] Figure 2 is a cross-sectional view of a mold stand in the present invention;

[0028] Figure 3 It is a schematic diagram of the matching structure of the water outlet pipe and the bearing fan in the present invention;

[0029] Figure 4 It is a schematic diagram of the matching structure of the electric push rod and the mold vertical plate in the present invention;

[0030] Figure 5 It is a schematic diagram of the matching structure of the handle and the mold top plate in the present invention;

[0031] Figure 6 It is a schematic diagram of the matching structure of the mold top plate and the mold vertical plate in the present invention;

[0032] Figure 7 It is a schematic diagram of the matching structure of the splicing plate and the mold top plate in the present invention;

[0033] Figure 8 It is a schematic diagram of the matching structure of the buckle and the limiting rod in the present invention;

[0034] Fig. 9 It is a method flow chart of the casting method in the present invention.

[0035] In the figure: 1. base; 11. vertical pole; 12. groove; 13. lower mold base; 14. mold vertical plate; 15. water pipe; 16. water inlet pipe; 17. water outlet pipe; 18. first fixed plate; 19. air guide tube; 110. bearing fan; 2. second fixed plate; 21. electric push rod; 22. movable rod; 23. notch; 24. mold top plate; 3. splicing plate; 31. pressing block; 32. feeding pipe; 4. first protrusion; 41. first groove; 42. second protrusion; 43. second groove; 5. buckle; 51. limit rod; 6. ribbon; 7. handle; 8. sealing gasket. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figures 1 to 8As shown, a device for preparing high-strength cast nylon products comprises a base 1, wherein the top side wall of the base 1 is fixedly connected with a plurality of vertical rods 11, the top side wall of the base 1 is provided with a plurality of grooves 12, the top side wall of the base 1 is fixedly connected with a lower mold base 13, the lower mold base 13 is arranged between the plurality of grooves 12, a plurality of mold vertical plates 14 are slidably connected to the middle of the inner side wall of the groove 12, the mold vertical plates 14 and the lower mold base 13 are arranged correspondingly, a buckling component is provided in the middle of the side wall of the mold vertical plate 14, a plurality of the mold vertical plates 14 and the lower mold base 13 are buckled into a whole, a moving component is provided in the middle of the side wall of the mold vertical plate 14, a water pipe 15 is fixedly connected to the middle of the side wall of the vertical rod 11, a water inlet pipe 16 is fixedly connected to the middle of the side wall of the water pipe 15, and the water pipe A plurality of water outlet pipes 17 are fixedly connected to the middle of the side wall of the vertical pole 11, and the water delivery pipe 15, the water inlet pipe 16 and the water outlet pipe 17 are all hollow and connected. A first fixed plate 18 is fixedly connected to the middle of the side wall of the vertical pole 11, and a plurality of air guide tubes 19 are fixedly connected to the middle of the side wall of the first fixed plate 18. A bearing fan 110 is fixedly connected to the middle of the inner wall of the air guide tube 19, and the bearing fan 110 is arranged above the water outlet pipe 17. When working, the staff melts the caprolactam monomer at an appropriate temperature, and adds a catalyst and a co-catalyst thereto, so as to obtain the molten and catalyzed caprolactam monomer. Then the staff controls the moving assembly to buckle the preheated lower mold base 13 and the plurality of mold vertical plates 14 together through the buckling assembly to form the required casting mold, and then the obtained The caprolactam monomer is injected into the casting mold, and then the lower mold base 13 and the mold vertical plate 14 are closed. At this time, the caprolactam monomer in the mold undergoes anionic polymerization reaction under the action of the catalyst to form a polymer chain, and gradually solidifies and forms. After the polymerization reaction is completed, the staff connects the water inlet pipe 16 to the water pump, and the water pump will transmit the water in the water tank to the water pipe 15 through the water inlet pipe 16, and then spray it on the surface of the mold vertical plate 14 from multiple water outlet pipes 17. At the same time, the staff starts multiple bearing fans 110, and the bearing fans 110 will dry the water sprayed on the surface of the mold vertical plate 14. At this time, the water on the surface of the mold vertical plate 14 will evaporate and absorb heat to cool the mold. When the mold is cooled to below room temperature, a fully solidified nylon product can be obtained. This step The water pipe 15, the water inlet pipe 16, the water outlet pipe 17, the first fixed plate 18, the air guide tube 19 and the bearing fan 110 are arranged in a step, and the heat on the surface of the mold vertical plate 14 can be quickly absorbed through the water evaporation heat absorption principle, thereby reducing the temperature of the mold vertical plate 14, and avoiding the cast nylon product from generating internal stress due to excessive temperature gradient during the cooling process. The existence of internal stress in the nylon product will cause deformation, cracking and other problems during subsequent processing or use, thereby reducing its strength. At the same time, water vapor can evenly cover the surface of the mold vertical plate 14 to achieve uniform cooling. Appropriate cooling speed and uniform cooling conditions can make the cast nylon product form a denser structure during the cooling process, improve its crystallinity and mechanical properties, and enhance the strength and durability of the product.

[0038] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the moving assembly includes a plurality of second fixed plates 2, the second fixed plates 2 are fixedly connected between a pair of adjacent vertical rods 11, an electric push rod 21 is provided in the middle of the side wall of the second fixed plate 2, an active rod 22 is fixedly connected to the output end of the electric push rod 21, the other end of the active rod 22 is fixedly connected to the mold vertical plate 14, a slot 23 is provided in the middle of the side wall of the mold vertical plate 14, a mold top plate 24 is slidably connected to the inner wall of the slot 23, and a plurality of the mold top plates 24 form a closed whole. During operation, when it is necessary to take out the cured nylon product from the lower mold base 13 and the mold vertical plate 14, the staff pulls the plurality of mold top plates 24, and the mold top plates 24 slide in the slot 23, and then the mold is opened from the top, and then the staff starts the plurality of electric push rods. Rod 21, the electric push rod 21 drives the movable rod 22 to move, and when the movable rod 22 moves, it will move the mold vertical plate 14 along the groove 12, so that the multiple mold vertical plates 14 are separated, and the solidified nylon product is taken out from the mold. In this step, by setting the second fixed plate 2, the electric push rod 21, the movable rod 22, the notch 23 and the mold top plate 24, the solidified cast nylon product can be smoothly separated from the mold, reducing the defects such as scratches and cracks on the surface of the product due to poor demoulding, affecting the appearance and performance of the product, ensuring that the product maintains a stable shape and dimensional accuracy during the demoulding process, improving the product qualification rate, and smooth demoulding can ensure the continuous operation of the production line, reduce production interruptions caused by demoulding difficulties, and improve the stability and reliability of the production line.

[0039] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the top side wall of the mold top plate 24 is fixedly connected with a splicing plate 3, and a plurality of the splicing plates 3 form a complete cylinder. A pressing block 31 is slidably matched in the middle of the inner side wall of the splicing plate 3, and a feed pipe 32 is fixedly connected in the middle of the side wall of one of the splicing plates 3. When working, when the mold vertical plates 14 are buckled together, a plurality of splicing plates 3 will form a complete cylinder, and then the pressing block 31 will be inserted into the cylinder. Then the staff will connect the feed pipe 32 with the external container for holding the molten and catalyzed caprolactam monomer, and the pressing block 31 will be pressed under pressure. The molten and catalyzed caprolactam monomer will be sucked into the rodless cavity of the cylinder and then into the mold. This step can add the molten and catalyzed caprolactam monomer to the mold when the nylon product is solidified by setting the splicing plate 3, the pressing block 31 and the feeding pipe 32, thereby reducing the pores and defects inside the product, thereby improving its density and overall strength. In addition, by fully filling the mold with the molten and catalyzed caprolactam monomer, the curing effect of the nylon product can be reduced due to insufficient raw materials when the nylon product is solidified, thereby reducing the waste of materials.

[0040] like Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, the buckling assembly includes a first protrusion 4, which is fixedly connected to the side wall of the mold vertical plate 14, and a first groove 41 is opened in the middle of the side wall of the mold vertical plate 14, and the first protrusion 4 and the first groove 41 are arranged correspondingly, and a second protrusion 42 is fixedly connected to the middle of the side wall of the mold top plate 24, and a second groove 43 is opened in the middle of the side wall of the mold top plate 24, and the second protrusion 42 and the second groove 43 are arranged correspondingly. When working, when the adjacent mold vertical plates 14 are pushed together by the moving assembly, the first protrusion 4 on the side wall of the mold vertical plate 14 will be inserted into the mold vertical plate 14 correspondingly. The first groove 41 opened on the side wall of the plate 14, and when the adjacent mold top plates 24 are close together, the second protrusion 42 on the side wall of the mold top plate 24 will be correspondingly inserted into the second groove 43 opened on the side wall of the mold top plate 24. This step can achieve a firm connection between the mold vertical plates 14 and the mold top plate 24 through the mutual engagement of the concave and convex parts by setting the first protrusion 4, the first groove 41, the second protrusion 42 and the second groove 43, thereby reducing the displacement or deformation of the mold caused by loosening or failure of the fixation between the lower mold base 13, the mold vertical plate 14 and the mold top plate 24.

[0041] like Figure 2 , Figure 7 and Figure 8As shown, a plurality of buckles 5 are fixedly connected to the middle part of the side wall of the mold upright plate 14, and a plurality of limit rods 51 are fixedly connected to the middle part of the side wall of the mold upright plate 14. The buckles 5 and the limit rods 51 are arranged correspondingly. During operation, when a plurality of mold upright plates 14 are buckled together, the staff buckles the plurality of buckles 5 on the side wall of the mold upright plate 14 onto the plurality of limit rods 51 on the side wall of the adjacent mold upright plate 14. This step can fix the position of the mold upright plate 14 from the outside by setting the buckles 5 and the limit rods 51, thereby ensuring that the mold upright plate 14 maintains a stable position during the casting process, reducing defects such as cracks, pores, and shrinkage holes in nylon products caused by the movement of the mold upright plate 14, and externally locking the mold upright plate 14 can increase the overall rigidity of the mold, making it less likely to deform when subjected to internal pressure, thereby ensuring the dimensional accuracy and shape stability of the nylon product.

[0042] like Figures 1 to 3 As shown, a streamer 6 is fixedly connected to the middle of the side wall of the water outlet pipe 17, and the streamer 6 is made of elastic material. During operation, when the water outlet pipe 17 sprays water to the surface of the mold vertical plate 14, a part of the water will be absorbed by the streamer 6 on the side wall of the water outlet pipe 17, and then under the blowing of the bearing fan 110, the streamer 6 starts to swing, and the water is slapped on the surface of the mold vertical plate 14. In this step, by setting the streamer 6, the liquid dripping from the surface of the water outlet pipe 17 can be fully utilized. When the streamer 6 swings with the wind direction, the absorbed liquid will be thrown to the surface of the mold vertical plate 14, so that the liquid contacts the mold vertical plate 14, and when the liquid is dried by the bearing fan 110, the heat on the surface of the mold vertical plate 14 is absorbed, which not only reduces the waste of water resources but also further improves the cooling efficiency of the curing of nylon products.

[0043] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a handle 7 is fixedly connected to the top side wall of the mold top plate 24, and a plurality of the handles 7 are staggered. By setting the handle 7 on the top of the mold top plate 24, the staff can easily and quickly open and close the mold top plate 24, provide an intuitive gripping point, and reduce inconvenience during use.

[0044] like Figure 5 and Figure 6 As shown, a sealing gasket 8 is fixedly connected to the middle of the side wall of the second protrusion 42, and the sealing gasket 8 is made of elastic material. In this step, by arranging the sealing gasket 8 on the side wall of the second protrusion 42, it can be ensured that the mold always maintains a good sealing effect during the casting process, ensure the stability of the internal environment of the mold, avoid the contamination of the medium to the nylon product, and ensure the smooth progress of the production process.

[0045] like Fig. 9As shown, a method for preparing a high-strength cast nylon product according to an embodiment of the present invention is applicable to the above-mentioned device for preparing a high-strength cast nylon product. The specific steps of the method are as follows:

[0046] S1: Select caprolactam monomer as the main raw material of cast nylon, ensure its purity and quality meet the requirements, select sodium hydroxide as a catalyst to initiate the anionic polymerization reaction of caprolactam, and select triphenylmethane triisocyanate as a co-catalyst to accelerate the polymerization reaction.

[0047] S2: Start heating the caprolactam monomer at 90°C until the temperature rises to 135°C to melt it.

[0048] S3: Add sodium hydroxide as catalyst and triphenylmethane triisocyanate as co-catalyst to the molten caprolactam monomer and stir evenly. The amount of catalyst and co-catalyst added needs to be adjusted according to the specific formula and process requirements.

[0049] S4: After adding the catalyst and the co-catalyst, the molten caprolactam monomer is subjected to vacuum dehydration treatment to reduce its moisture content.

[0050] S5: The dehydrated molten caprolactam monomer is quickly cast into a mold preheated to 160°C. In the mold, the caprolactam monomer undergoes a rapid polymerization reaction under the action of the catalyst and the co-catalyst.

[0051] S6: After the polymerization reaction is completed, the mold is cooled to room temperature and the solidified nylon product is removed from the mold.

[0052] During operation, the staff melts the caprolactam monomer at an appropriate temperature, and adds a catalyst and a co-catalyst thereto to obtain the molten and catalyzed caprolactam monomer. Then the staff controls the moving assembly to buckle the preheated lower mold base 13 and multiple mold vertical plates 14 together through the buckling assembly to form the required casting mold, and then injects the obtained caprolactam monomer into the casting mold, and then closes the lower mold base 13 and the mold vertical plates 14. At this time, the caprolactam monomer in the mold undergoes anionic polymerization reaction under the action of the catalyst to form a polymer chain, and gradually solidifies into shape. After the polymerization reaction is completed, the staff connects the water inlet pipe 16 to the water pump, and the water pump will transfer the water in the water tank to the water pipe 15 through the water inlet pipe 16, and then spray it on the surface of the mold vertical plate 14 from the multiple water outlet pipes 17. At the same time, the staff starts multiple bearing fans 110, and the bearing fans 110 will spray the water sprayed on the surface of the mold vertical plate 14 The mold is blown dry for a period of time. At this time, the moisture on the surface of the mold vertical plate 14 will evaporate and absorb heat, and the mold is cooled. When the mold is cooled to below room temperature, a fully solidified nylon product can be obtained. In this step, a water pipe 15, a water inlet pipe 16, a water outlet pipe 17, a first fixed plate 18, an air guide tube 19 and a bearing fan 110 are arranged. The heat on the surface of the mold vertical plate 14 can be quickly absorbed by the principle of moisture evaporation and heat absorption, thereby reducing the temperature of the mold vertical plate 14 and avoiding the cast nylon product from generating internal stress due to excessive temperature gradient during the cooling process. The existence of internal stress in the nylon product will cause deformation, cracking and other problems during subsequent processing or use, thereby reducing its strength. At the same time, water vapor can evenly cover the surface of the mold vertical plate 14 to achieve uniform cooling. Appropriate cooling speed and uniform cooling conditions can make the cast nylon product form a denser structure during the cooling process, improve its crystallinity and mechanical properties, and enhance the strength and durability of the product.

[0053] When it is necessary to take out the solidified nylon product from the lower mold base 13 and the mold vertical plate 14, the staff pulls the multiple mold top plates 24, and the mold top plates 24 slide inside the slot 23, and then the mold is opened from the top, and then the staff starts the multiple electric push rods 21, and the electric push rods 21 drive the movable rods 22 to move. When the movable rods 22 move, they will move the mold vertical plates 14 along the groove 12, so that the multiple mold vertical plates 14 are separated, and the solidified nylon product is taken out of the mold. This step can smoothly separate the solidified cast nylon product from the mold by setting the second fixed plate 2, the electric push rods 21, the movable rods 22, the slot 23 and the mold top plate 24, reduce the defects such as scratches and cracks on the surface of the product due to poor demoulding, affect the appearance and performance of the product, ensure that the product maintains a stable shape and dimensional accuracy during the demoulding process, improve the product qualification rate, and smooth demoulding can ensure the continuous operation of the production line, reduce production interruptions caused by demoulding difficulties, and improve the stability and reliability of the production line.

[0054] When the mold vertical plates 14 are buckled together, multiple splicing plates 3 will form a complete cylinder, and then the pressing block 31 will be inserted into the cylinder. Then the staff will connect the feeding pipe 32 to the external container for the molten and catalyzed caprolactam monomer. When the pressing block 31 is subjected to a pressure difference, the molten and catalyzed caprolactam monomer will be drawn into the rodless cavity of the cylinder and then into the mold. In this step, by setting the splicing plates 3, the pressing block 31 and the feeding pipe 32, the molten and catalyzed caprolactam monomer can be added to the mold when the nylon product is solidified, thereby reducing the pores and defects inside the product, thereby improving its density and overall strength. In addition, by fully filling the molten and catalyzed caprolactam monomer into the mold, the situation in which the curing effect of the nylon product is affected by insufficient raw materials during curing, thereby reducing material waste.

[0055] When adjacent mold uprights 14 are pressed together under the push of the moving component, the first protrusion 4 on the side wall of the mold upright 14 will be correspondingly inserted into the first groove 41 opened on the side wall of the mold upright 14, and at the same time, when adjacent mold top plates 24 are pressed together, the second protrusion 42 on the side wall of the mold top plate 24 will be correspondingly inserted into the second groove 43 opened on the side wall of the mold top plate 24. In this step, by setting the first protrusion 4, the first groove 41, the second protrusion 42 and the second groove 43, the concave and convex parts are mutually engaged to achieve a stable connection between the mold uprights 14 and the mold top plate 24, thereby reducing the displacement or deformation of the mold caused by loosening or failure of the fixation between the lower mold base 13, the mold upright 14 and the mold top plate 24.

[0056] When multiple mold uprights 14 are buckled together, the staff buckles the multiple clips 5 on the side walls of the mold uprights 14 onto the multiple limit rods 51 on the side walls of the adjacent mold uprights 14. This step can fix the position of the mold uprights 14 from the outside by setting the clips 5 and the limit rods 51, ensuring that the mold uprights 14 maintain a stable position during the casting process, reducing defects such as cracks, pores, shrinkage holes, etc. in the nylon product caused by the movement of the mold uprights 14, and externally locking the mold uprights 14 can increase the overall rigidity of the mold, making it less likely to deform when subjected to internal pressure, thereby ensuring the dimensional accuracy and shape stability of the nylon product.

[0057] When the water outlet pipe 17 sprays water onto the surface of the mold vertical plate 14, a part of the water will be absorbed by the streamer 6 on the side wall of the water outlet pipe 17, and then the streamer 6 starts to swing under the blowing of the bearing fan 110, and the water is splashed on the surface of the mold vertical plate 14. In this step, by setting the streamer 6, the liquid dripping from the surface of the water outlet pipe 17 can be fully utilized. When the streamer 6 swings with the wind direction, the absorbed liquid will be thrown onto the surface of the mold vertical plate 14, so that the liquid contacts the mold vertical plate 14, and when the liquid is dried by the bearing fan 110, the heat on the surface of the mold vertical plate 14 is absorbed, which not only reduces the waste of water resources but also further improves the cooling efficiency of the curing of nylon products.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining 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 fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for preparing high-strength cast nylon products, comprising a base (1), characterized in that: The top side wall of the base (1) is fixedly connected with a plurality of vertical rods (11), the top side wall of the base (1) is provided with a plurality of grooves (12), the top side wall of the base (1) is fixedly connected with a lower mold base (13), the lower mold base (13) is arranged between the plurality of grooves (12), a plurality of mold vertical plates (14) are slidably connected in the middle of the inner side wall of the groove (12), the mold vertical plates (14) and the lower mold base (13) are arranged correspondingly, a buckling component is provided in the middle of the side wall of the mold vertical plate (14), the plurality of the mold vertical plates (14) and the lower mold base (13) are buckled into a whole, and a moving component is provided in the middle of the side wall of the mold vertical plate (14). A water pipe (15) is fixedly connected to the middle of the side wall of the vertical pole (11), a water inlet pipe (16) is fixedly connected to the middle of the side wall of the water pipe (15), and a plurality of water outlet pipes (17) are fixedly connected to the middle of the side wall of the water pipe (15); the water pipe (15), the water inlet pipe (16) and the water outlet pipe (17) are all hollow and connected; a first fixing plate (18) is fixedly connected to the middle of the side wall of the vertical pole (11), a plurality of air guide tubes (19) are fixedly connected to the middle of the side wall of the first fixing plate (18), a bearing fan (110) is fixedly connected to the middle of the inner side wall of the air guide tube (19), and the bearing fan (110) is arranged above the water outlet pipe (17).

2. The device for preparing high-strength cast nylon products according to claim 1, characterized in that: The moving assembly comprises a plurality of second fixed plates (2), wherein the second fixed plates (2) are fixedly connected between a pair of adjacent vertical rods (11), an electric push rod (21) is provided in the middle of the side wall of the second fixed plate (2), an output end of the electric push rod (21) is fixedly connected to a movable rod (22), the other end of the movable rod (22) is fixedly connected to a mold vertical plate (14), a slot (23) is provided in the middle of the side wall of the mold vertical plate (14), the inner side wall of the slot (23) is slidably connected to a mold top plate (24), and a plurality of the mold top plates (24) form a closed whole.

3. The device for preparing high-strength cast nylon products according to claim 2, characterized in that: A splicing plate (3) is fixedly connected to the top side wall of the mold top plate (24), and a plurality of the splicing plates (3) form a complete cylinder. A pressing block (31) is slidably fitted in the middle of the inner side wall of the splicing plate (3), and a feed pipe (32) is fixedly connected to the middle of the side wall of one of the splicing plates (3).

4. The device for preparing high-strength cast nylon products according to claim 2, characterized in that: The snap-fit ​​assembly comprises a first protrusion (4), the first protrusion (4) being fixedly connected to the side wall of the mold vertical plate (14), a first groove (41) being provided in the middle of the side wall of the mold vertical plate (14), the first protrusion (4) and the first groove (41) being arranged correspondingly, a second protrusion (42) being fixedly connected to the middle of the side wall of the mold top plate (24), a second groove (43) being provided in the middle of the side wall of the mold top plate (24), the second protrusion (42) and the second groove (43) being arranged correspondingly.

5. The device for preparing high-strength cast nylon products according to claim 4, characterized in that: A plurality of buckles (5) are fixedly connected to the middle of the side wall of the mold upright plate (14), and a plurality of limiting rods (51) are fixedly connected to the middle of the side wall of the mold upright plate (14), and the buckles (5) and the limiting rods (51) are arranged correspondingly.

6. The device for preparing high-strength cast nylon products according to claim 1, characterized in that: A streamer (6) is fixedly connected to the middle of the side wall of the water outlet pipe (17), and the streamer (6) is made of elastic material.

7. The device for preparing high-strength cast nylon products according to claim 4, characterized in that: A handle (7) is fixedly connected to the top side wall of the mold top plate (24), and a plurality of handles (7) are arranged in a staggered manner.

8. The device for preparing high-strength cast nylon products according to claim 4, characterized in that: A sealing gasket (8) is fixedly connected to the middle of the side wall of the second protrusion (42), and the sealing gasket (8) is made of elastic material.

9. A method for preparing high-strength cast nylon products, the method is applicable to the device for preparing high-strength cast nylon products described in claims 1 to 7 above, and the specific steps of the method are as follows: S1: Select caprolactam monomer as the main raw material of cast nylon, ensure its purity and quality meet the requirements, select sodium hydroxide as a catalyst to initiate the anionic polymerization reaction of caprolactam, and select triphenylmethane triisocyanate as a co-catalyst to accelerate the polymerization reaction. S2: Start heating the caprolactam monomer at 90°C until the temperature rises to 135°C to melt it. S3: Add sodium hydroxide as catalyst and triphenylmethane triisocyanate as co-catalyst to the molten caprolactam monomer and stir evenly. The amount of catalyst and co-catalyst added needs to be adjusted according to the specific formula and process requirements. S4: After adding the catalyst and the co-catalyst, the molten caprolactam monomer is subjected to vacuum dehydration treatment to reduce its moisture content. S5: The dehydrated molten caprolactam monomer is quickly cast into a mold preheated to 160°C. In the mold, the caprolactam monomer undergoes a rapid polymerization reaction under the action of the catalyst and the co-catalyst. S6: After the polymerization reaction is completed, the mold is cooled to room temperature and the solidified nylon product is removed from the mold.

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