Enhanced polypropylene engineering plastic processing equipment and preparation method thereof

Abstract

The processing equipment comprises a screw extruder, a feeding mechanism located at the top end of the screw extruder, a heat conduction mechanism located on the outer side of the screw extruder, an upper mold body and a lower mold body, the upper mold body and the lower mold body are located at the output end of the screw extruder, and the upper mold body and the lower mold body are combined. A mold supporting frame is supported at the bottom end of the lower mold body, and the bottom end of the mold supporting frame is fixedly connected with a base. The heat conduction mechanism comprises a heat pipe body and a cold pipe body, the heat pipe body is filled with heat conduction oil, the cold pipe body is filled with cooling liquid, and a plurality of hollow heat conduction blocks are connected between the heat pipe body and the cold pipe body at the same time. The enhanced polypropylene engineering plastic processing equipment and the preparation method thereof disclosed by the invention have the effects of guaranteeing the melting requirement, the fluidity, the mixing property and the finished product quality of raw materials in the feeding process, simultaneously playing a role in saving the cost, avoiding chilling of a mold in the cooling process and effectively protecting the mold.

Description

Technical Field

[0001] The invention relates to the technical field of polypropylene plastic production, in particular to enhanced polypropylene engineering plastic processing equipment and a preparation method thereof. Background Art

[0002] Injection molding equipment is a basic tool for producing plastic products and is the main tool in the production process of reinforced polypropylene engineering plastics. It mainly uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics.

[0003] In order to optimize the solidification speed of plastic after extrusion and optimize production efficiency, cooling equipment such as water cooling is generally installed outside the mold. After the plastic is extruded, it is cooled by the cooling equipment to optimize production efficiency. However, the use of cooling equipment will lead to the following defects:

[0004] 1. The material entering the mold is affected by the cooling equipment and will solidify first in the mold, resulting in defective finished products and stress defects;

[0005] 2. When high-temperature plastic enters the mold, the temperature of the mold will increase. The rapid cooling of the mold by the cooling equipment will cause the mold to become brittle, affecting the service life of the mold. Summary of the invention

[0006] The invention discloses enhanced polypropylene engineering plastic processing equipment and a preparation method thereof, aiming to solve the technical problems that materials entering into a mold are affected by a cooling device and solidify preferentially in the mold, resulting in defective finished products and stress defects; high-temperature plastics entering the mold drive the mold temperature to rise, and the rapid cooling of the mold by the cooling device causes the mold to become brittle, thereby affecting the service life of the mold.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] Reinforced polypropylene engineering plastic processing equipment, including a screw extruder, a feeding mechanism located at the top of the screw extruder, a heat conduction mechanism located outside the screw extruder, an upper mold body and a lower mold body located at the output end of the screw extruder, the upper mold body and the lower mold body are combined, and a mold support frame is supported at the bottom end of the lower mold body, and the bottom end of the mold support frame is fixedly connected to a base;

[0009] The heat conduction mechanism comprises a heat pipe body and a cold pipe body, and the heat pipe body is filled with heat conduction oil, and the cold pipe body is filled with coolant, a plurality of hollow heat conduction blocks are connected between the heat pipe body and the cold pipe body, and a connecting plate is connected between two adjacent hollow heat conduction blocks, a plurality of sliders are fixedly connected to the outside of the connecting plate, a plurality of linear guide rails are arranged at the top end of the base, and the plurality of sliders are correspondingly and movably connected to the plurality of linear guide rails;

[0010] The upper mold body and the lower mold body are simultaneously and equidistantly provided with a plurality of heat-conducting grooves, and the heat pipe body and the cold pipe body are movably fitted in the plurality of heat-conducting grooves, the input end and the output end of the cold pipe body are simultaneously connected to the condenser through a hose 1, the input end and the output end of the heat pipe body are respectively connected to a heat-conducting chamber 2 and a circulation heater through a hose 2, and the input end and the output end of the cold pipe body are simultaneously connected to a condenser;

[0011] The heat-conducting bin 2 surrounds the outside of the tail end of the screw extruder, and a plurality of baffles are staggeredly arranged in the heat-conducting bin 2, a plurality of connecting pipes 2 are tightly connected to the inner wall of the other side of the heat-conducting bin 2, and a plurality of heat-conducting bins 1 are connected to the output end of the connecting pipe 2, and the plurality of heat-conducting bins 1 surround the outside of the feeding mechanism and are connected to each other, and the inner wall of the bottom end of the heat-conducting bin 1 is connected to the circulation heater;

[0012] The inner wall of each hollow heat-conducting block is provided with a plurality of heat-dissipating fins at equal intervals, and a plurality of blowers are installed on the top of the base, and the output ends of the blowers are facing the heat-dissipating fins;

[0013] The heat pipe body and the cold pipe body are repeatedly bent and bent into a plurality of longitudinal pipe bodies arranged in parallel. Two longitudinal pipe bodies arranged in parallel are movably fitted in each of the heat conduction grooves. The top and bottom ends of each of the hollow heat conduction blocks are respectively fixedly connected with fixing hooks, and the fixing hooks are connected to the connection between the two longitudinal pipe bodies in the heat pipe body and the cold pipe body.

[0014] The top and bottom inner walls of two adjacent heat transfer bins 1 are respectively connected to a horizontal bin, the connecting pipe 2 is connected to the inner wall of the horizontal bin located at a high position, and the inner wall of the horizontal bin located at a low position is connected to a connecting pipe 3, and the connecting pipe 3 is connected to the circulation heater;

[0015] An injection port is arranged at the connection between the upper mold body and the lower mold body, an injection pipe is installed at the output end of the screw extruder, and the output end of the injection pipe is tightly connected to the injection port.

[0016] By providing a heat conduction mechanism, the heat conduction mechanism mainly provides circulation heating and cooling for the heat conduction oil and coolant in the heat pipe body and the cold pipe body through the circulation heater and the condenser, and makes the two flow inside the heat pipe body and the cold pipe body respectively. During the whole flow process of the heat conduction oil, its heat will decrease one by one, which can successively meet the required temperature of melting raw materials, ensuring the fluidity of raw materials, and avoiding the solidification of raw materials. At the same time, based on the use of the same heating path, it also plays a role in saving costs. In addition, when the injection is completed, the linear guide drives the slider to move up along the linear guide, so that the outer wall of the heat pipe body gradually separates from the heat conduction groove on the upper mold body and the lower mold body, and the heat conduction groove first contacts with the hollow heat conduction block, and the heat conduction The residual heat on the groove is in contact with the hollow heat-conducting block, and the heat dissipation area is increased based on the setting of the heat dissipation fins. The blower fan blows air upward to take away the heat on the heat dissipation fins, so that the temperature on the heat-conducting groove drops rapidly, and then contacts the outer wall of the cold pipe body to increase the heat dissipation efficiency, so that the upper mold body and the lower mold body are quickly cooled, thereby achieving rapid cooling inside the upper mold body and the lower mold body, accelerating the solidification of polypropylene plastic, and optimizing work efficiency by reducing the time required for cooling. At the same time, during the cooling process, the transition of the hollow heat-conducting block and the heat dissipation fins can avoid sudden cooling of the heat-conducting groove position, which affects the brittleness of the upper mold body and the lower mold body under long-term use and increases the risk of fracture, and also provides effective protection for the cold pipe body.

[0017] In a preferred embodiment, the feeding mechanism includes a plurality of connecting pipes 1, and the plurality of connecting pipes 1 are simultaneously connected to the inner wall of the top end of the screw extruder, the inner wall of the top end of each connecting pipe 1 is tightly connected to a funnel, and the heat transfer chamber 1 is arranged around the outside of the funnel;

[0018] The top inner wall of each of the funnels is fixedly connected to a transition bin, and the top outer wall of the transition bin is fixedly connected to an annular support plate 1, the top of the annular support plate 1 is fixedly connected to an elastic rubber sleeve, and the top of the elastic rubber sleeve is fixedly connected to an annular support plate 2, and a screw conveyor is installed in each of the funnels, and the screw conveyor includes a driving end connected to the inner wall of the funnel;

[0019] The inner wall of the funnel is fixedly connected with a cover cover, and the cover cover covers the top of the driving end, the top of the annular support plate 2 is penetrated with a plurality of limit plug holes, the top of the annular support plate 1 is equidistantly provided with a plurality of limit plug rods, and the plurality of limit plug rods are movably inserted into the limit plug holes;

[0020] The top of the annular support plate 2 is fixedly connected with a plurality of card slots, and each card slot is respectively provided with a through slot, and a card is respectively clamped in each of the card slots, and the plurality of cards are equidistantly surrounded by the outer periphery of the top plate, and a handle is installed on the top outer wall of the top plate;

[0021] The preparation method of reinforced polypropylene engineering plastics comprises the following specific steps:

[0022] S1: Adjust the rotation speed of the screw conveyor at different positions according to the raw material ratio;

[0023] S2: Prepare the raw materials required for the reinforced polypropylene engineering plastic, weigh them respectively, and place them into different elastic rubber sleeves;

[0024] S3: Cover the top plate and rotate it to insert the card into the card slot;

[0025] S4: The top plate pushes the material into the hopper and is heated and melted by the heat transfer oil in the heat transfer chamber;

[0026] S5: The screw conveyor pushes the molten material into the screw extruder for mixing, and the material is extruded between the upper mold body and the lower mold body by the action of the screw extruder;

[0027] S6: cooling;

[0028] S7: Open the upper mold body and take out the workpiece;

[0029] The step S6, cooling down comprises the following specific steps:

[0030] S61: After extrusion is completed, the linear guide rail drives the slider to move up slowly;

[0031] S62: pre-cooling the upper mold body and the lower mold body by means of heat dissipation fins and a blower fan;

[0032] S63: Rapidly cool the mold body and the lower mold body by contacting with the cold pipe body.

[0033] By providing a feeding mechanism, in the preparation process of general polypropylene reinforced plastic, the raw materials are directly placed in the screw extruder in the form of particles, and are directly melted and mixed in the screw extruder. However, due to the different qualities of different materials, solid stratification may occur in the screw extruder before melting, and after melting, it will directly lead to uneven mixing of the raw materials. If the mixing uniformity is to be guaranteed, the length of the screw extruder needs to be greatly extended to achieve a mixing process of sufficient length, which requires a large placement space, resulting in insufficient space utilization. The present invention directly passes the heat transfer oil in the heat transfer chamber before feeding to leak The raw materials in the bucket are melted and conveyed downward through the screw conveyor. When the melted materials enter the screw extruder, the feeding and melting steps can be subtracted to ensure their uniform mixing degree. At the same time, the required length of the screw extruder is reduced to the greatest extent, and the space utilization rate is optimized through the longitudinal setting. In addition, when placing the raw materials, the elastic rubber sleeve can be stretched according to the placement amount and then covered with the top plate. As the material falls, the elastic rubber sleeve shrinks accordingly, and the material is pushed through the top plate and the contraction force, causing it to fall evenly. At the same time, as the elastic rubber sleeve shrinks, the material stacking height can also be intuitively seen to ensure the timeliness of material addition.

[0034] As can be seen from the above, the enhanced polypropylene engineering plastic processing equipment and the preparation method thereof include a screw extruder, a feeding mechanism located at the top of the screw extruder, a heat-conducting mechanism located outside the screw extruder, an upper mold body and a lower mold body located at the output end of the screw extruder, the upper mold body and the lower mold body are combined, and a mold support frame is supported at the bottom end of the lower mold body, and the bottom end of the mold support frame is fixedly connected to a base; the heat-conducting mechanism includes a heat pipe body and a cold pipe body, and the heat pipe body is filled with heat-conducting oil, and the cold pipe body is filled with coolant, a plurality of hollow heat-conducting blocks are connected between the heat pipe body and the cold pipe body at the same time, and a connecting plate is connected between two adjacent hollow heat-conducting blocks at the same time, a plurality of sliders are fixedly connected to the outside of the connecting plate, a plurality of linear guide rails are arranged at the top of the base, and the plurality of sliders correspond to It is movably connected to multiple linear guide rails; multiple heat-conducting grooves are equidistantly arranged on the outer sides of the upper mold body and the lower mold body, and the heat pipe body and the cold pipe body are movably fitted in the multiple heat-conducting grooves, the input end and output end of the cold pipe body are simultaneously connected to the condenser through hose 1, the input end and output end of the heat pipe body are respectively connected to heat-conducting bin 2 and a circulation heater through hose 2, and the input end and output end of the cold pipe body are simultaneously connected to a condenser; the heat-conducting bin 2 surrounds the outer side of the tail end of the screw extruder, and multiple baffles are staggered in the heat-conducting bin 2, the inner wall on the other side of the heat-conducting bin 2 is tightly connected to multiple connecting pipes 2, and the output end of the connecting pipe 2 is connected to multiple heat-conducting bins 1, the multiple heat-conducting bins 1 surround the outside of the feeding mechanism and are connected to each other, and the inner wall of the bottom end of the heat-conducting bin 1 is connected to the circulation heater. The enhanced polypropylene engineering plastic processing equipment and preparation method provided by the present invention can ensure the melting requirements, fluidity, miscibility and quality of finished products of raw materials during the feeding process, while playing the role of saving costs. In addition, it can also avoid the quenching of the mold during the cooling process, thereby providing effective protection for the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall appearance structure of the enhanced polypropylene engineering plastic processing equipment proposed by the present invention.

[0036] Figure 2 This is a schematic diagram of the upper and lower mold connection structure of the enhanced polypropylene engineering plastic processing equipment proposed by the present invention.

[0037] Figure 3 This is a schematic diagram of the structure of the heat conduction mechanism on the right side of the enhanced polypropylene engineering plastic processing equipment proposed by the present invention.

[0038] Figure 4 This is a schematic diagram of the connection structure of the hot pipe body and the cold pipe body of the enhanced polypropylene engineering plastic processing equipment proposed by the present invention.

[0039] Figure 5This is a schematic structural diagram of the left side heat conduction mechanism of the enhanced polypropylene engineering plastic processing equipment proposed by the present invention.

[0040] Figure 6 This is a schematic diagram of the disassembled heat conduction mechanism at the feeding position of the enhanced polypropylene engineering plastic processing equipment proposed by the present invention.

[0041] Figure 7 This is a schematic diagram of the feeding mechanism structure of the enhanced polypropylene engineering plastic processing equipment proposed by the present invention.

[0042] Figure 8 This is a schematic diagram of the disassembly of a single feeding mechanism of the method for preparing reinforced polypropylene engineering plastics proposed in the present invention.

[0043] Fig. 9 The present invention provides a specific flow chart of the method for preparing the reinforced polypropylene engineering plastic.

[0044] In the figure: 1, feeding mechanism; 2, screw extruder; 3, heat conduction mechanism; 4, upper mold body; 5, lower mold body; 6, mold support frame; 7, base; 8, injection pipe; 9, injection port; 101, funnel; 102, connecting pipe 1; 103, handle; 104, top plate; 105, limit rod; 106, elastic rubber sleeve; 107, annular support plate 1; 108, transition chamber; 109, screw conveyor; 110, card; 111, card slot; 112, through slot; 113, annular support plate 2; 114, cover; 115. Limiting jack; 301. Heat transfer groove; 302. Heat pipe body; 303. Linear guide rail; 304. Slider; 305. Blower fan; 306. Cold pipe body; 307. Condenser; 308. Hose 1; 309. Hose 2; 310. Fixing hook; 311. Connecting plate; 312. Hollow heat transfer block; 313. Heat sink fin; 314. Heat transfer chamber 1; 315. Connecting pipe 2; 316. Heat transfer chamber 2; 317. Baffle; 318. Circulation heater; 319. Connecting pipe 3; 320. Horizontal chamber. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] The enhanced polypropylene engineering plastic processing equipment and the preparation method thereof disclosed in the present invention are mainly used in the scenario of enhanced polypropylene engineering plastic processing.

[0047] Reference Figure 1-Figure 6, a reinforced polypropylene engineering plastic processing equipment, comprising a screw extruder 2, a feeding mechanism 1 located at the top of the screw extruder 2, a heat conduction mechanism 3 located outside the screw extruder 2, an upper mold body 4 and a lower mold body 5 located at the output end of the screw extruder 2, the upper mold body 4 and the lower mold body 5 are combined, and a mold support frame 6 is supported at the bottom end of the lower mold body 5, and a base 7 is fixedly connected to the bottom end of the mold support frame 6;

[0048] The heat conduction mechanism 3 includes a heat pipe body 302 and a cold pipe body 306, and the heat pipe body 302 is filled with heat conduction oil, and the cold pipe body 306 is filled with cooling liquid. A plurality of hollow heat conduction blocks 312 are connected between the heat pipe body 302 and the cold pipe body 306, and a connecting plate 311 is connected between two adjacent hollow heat conduction blocks 312. A plurality of sliders 304 are fixedly connected to the outside of the connecting plate 311. A plurality of linear guide rails 303 are arranged at the top of the base 7, and the plurality of sliders 304 are correspondingly and movably connected to the plurality of linear guide rails 303.

[0049] A plurality of heat-conducting grooves 301 are equidistantly arranged outside the upper mold body 4 and the lower mold body 5, and the heat pipe body 302 and the cold pipe body 306 are movably fitted in the plurality of heat-conducting grooves 301, the input end and the output end of the cold pipe body 306 are simultaneously connected to the condenser 307 through the hose 1 308, the input end and the output end of the heat pipe body 302 are respectively connected to the heat-conducting chamber 2 316 and the circulation heater 318 through the hose 2 309, and the input end and the output end of the cold pipe body 306 are simultaneously connected to the condenser 307;

[0050] The heat-conducting bin 2 316 surrounds the outer side of the tail end of the screw extruder 2, and a plurality of baffles 317 are staggeredly arranged in the heat-conducting bin 2 316. The inner wall on the other side of the heat-conducting bin 2 316 is tightly connected to a plurality of connecting pipes 2 315, and the output end of the connecting pipe 2 315 is connected to a plurality of heat-conducting bins 1 314. The plurality of heat-conducting bins 1 314 surround the outside of the feeding mechanism 1 and are connected to each other, and the inner wall at the bottom end of the heat-conducting bin 1 314 is connected to the circulation heater 318.

[0051] The inner wall of each hollow heat-conducting block 312 is equidistantly provided with a plurality of heat-dissipating fins 313, a plurality of blowers 305 are installed on the top of the base 7, and the output end of the blower fan 305 is oriented toward the heat-dissipating fin 313. The heat-conducting mechanism 3 mainly provides circulating heating and cooling for the heat-conducting oil and the coolant in the heat pipe body 302 and the cold pipe body 306 through the circulating heater 318 and the condenser 307, and makes the two flow inside the heat pipe body 302 and the cold pipe body 306 respectively. During the entire flow process of the heat-conducting oil, its heat will decrease one by one, which can successively meet the required temperature of melting the raw material, ensuring the fluidity of the raw material, and avoiding the solidification of the raw material. At the same time, based on the use of the same heating path, it also plays a role in saving costs. In addition, when the injection is completed, the linear guide 303 drives the slider 304 to move upward along the linear guide 303, so that the outer wall of the heat pipe body 302 gradually separates from the upper mold body 4 and the lower mold body 5 The heat conducting groove 301 is in the heat conducting groove 301, and the heat conducting groove 301 first contacts with the hollow heat conducting block 312. The residual heat on the heat conducting groove 301 contacts with the hollow heat conducting block 312, and the heat dissipation area is increased based on the setting of the heat dissipation fins 313. The blower fan 305 blows air upward to take away the heat on the heat dissipation fins 313, so that the temperature on the heat conducting groove 301 drops rapidly, and then contacts with the outer wall of the cold pipe body 306, thereby increasing the heat dissipation efficiency and cooling the upper mold body 4 and the lower mold body 5 rapidly, thereby realizing rapid cooling inside the upper mold body 4 and the lower mold body 5, accelerating the solidification of the polypropylene plastic, and optimizing the work efficiency by reducing the time required for cooling. At the same time, during the cooling process, the transition of the hollow heat conducting block 312 and the heat dissipation fins 313 can avoid the heat conducting groove 301 from being quenched, which affects the brittleness of the upper mold body 4 and the lower mold body 5 and increases the risk of fracture under long-term use, and also provides effective protection for the cold pipe body 306.

[0052] Reference Figure 3 and Figure 4 In a preferred embodiment, the heat pipe body 302 and the cold pipe body 306 have a repeatedly bent structure, and are bent into a plurality of longitudinal pipe bodies arranged in parallel. Two longitudinal pipe bodies arranged in parallel are movably fitted in each heat conductive groove 301, and the top and bottom ends of each hollow heat conductive block 312 are fixedly connected with a fixing hook 310, and the fixing hook 310 is connected to the connection between the two longitudinal pipe bodies in the heat pipe body 302 and the cold pipe body 306.

[0053] Reference Figure 1 and Figure 3 In a preferred embodiment, the top and bottom inner walls of two adjacent heat transfer chambers 1 314 are respectively connected to a horizontal chamber 320, a connecting pipe 2 315 is connected to the inner wall of the horizontal chamber 320 located at a high position, and a connecting pipe 3 319 is connected to the inner wall of the horizontal chamber 320 located at a low position, and the connecting pipe 3 319 is connected to the circulation heater 318.

[0054] Reference Figure 1-Figure 2In a preferred embodiment, an injection port 9 is provided at the connection between the upper mold body 4 and the lower mold body 5 , an injection pipe 8 is installed at the output end of the screw extruder 2 , and the output end of the injection pipe 8 is tightly connected to the injection port 9 .

[0055] Reference Figure 6-Figure 8 In a preferred embodiment, the feeding mechanism 1 includes a plurality of connecting tubes 102, and the plurality of connecting tubes 102 are simultaneously connected to the top inner wall of the screw extruder 2, the top inner wall of each connecting tube 102 is tightly connected to the funnel 101, and the heat transfer chamber 314 is arranged around the outside of the funnel 101.

[0056] Reference Figure 6-Figure 8 In a preferred embodiment, the top inner wall of each funnel 101 is fixedly connected with a transition bin 108, and the top outer wall of the transition bin 108 is fixedly connected with an annular support plate 107, the top of the annular support plate 107 is fixedly connected with an elastic rubber sleeve 106, and the top of the elastic rubber sleeve 106 is fixedly connected with an annular support plate 2 113, and a screw conveyor 109 is installed in each funnel 101, and the screw conveyor 109 includes a driving end connected to the inner wall of the funnel 101.

[0057] Reference Figure 6-Figure 8 In a preferred embodiment, the inner wall of the funnel 101 is fixedly connected with a covering cover 114, and the covering cover 114 covers the top of the driving end, a plurality of limiting holes 115 are penetrated through the top of the annular support plate 113, and a plurality of limiting rods 105 are equidistantly arranged at the top of the annular support plate 107, and the plurality of limiting rods 105 are movably inserted into the limiting holes 115.

[0058] Reference Figure 6-Figure 8In a preferred embodiment, a plurality of card slots 111 are fixedly connected to the top of the annular support plate 113, and each card slot 111 is respectively penetrated by a through groove 112, and a card 110 is respectively clamped in each card slot 111, and a plurality of cards 110 are equidistantly surrounded by the outer periphery of the top plate 104, and a handle 103 is installed on the top outer wall of the top plate 104. In the preparation process of general polypropylene reinforced plastic, the raw materials are directly placed in the screw extruder 2 in granular form, and directly melted and mixed in the screw extruder 2. However, due to the different qualities of different materials, solid stratification may occur in the screw extruder 2 before melting, and after melting, it will directly lead to uneven mixing of the raw materials. If the uniformity of mixing is to be guaranteed, the length of the screw extruder 2 needs to be greatly extended to achieve a mixing process of sufficient length, which requires a large placement space, resulting in insufficient space utilization. The present invention melts the raw materials in the funnel 101 directly through the heat transfer oil in the heat transfer bin 1 314 before feeding, and conveys it downward through the screw conveyor 109 The screw conveyor 109 can slow down the falling speed of the material so that it can evenly contact the inner wall of the funnel 101 to accelerate the melting speed and avoid the adhesion and accumulation of the melted material in the funnel 101. At the same time, adjusting the rotation speed of the screw conveyor 109 can also achieve the feeding speed of different materials to adapt to the proportion of different materials. When the melted material enters the screw extruder 2, the feeding and melting steps can be subtracted to ensure its uniform mixing degree. At the same time, the required length of the screw extruder 2 is greatly reduced. The longitudinal setting is used to optimize space utilization. In addition, when placing raw materials, the elastic rubber sleeve 106 can be stretched according to the placement amount, the raw materials are placed in the elastic rubber sleeve 106, and then the top plate 104 is covered. The top plate 104 is rotated to make the card 110 engage in the card slot 111. As a result, when the material falls, the elastic rubber sleeve 106 shrinks accordingly, and the material is pushed through the top plate 104 and the shrinkage force, causing it to fall evenly. At the same time, as the elastic rubber sleeve 106 shrinks, the material stacking height can also be intuitively seen to ensure the timeliness of material addition.

[0059] Reference Fig. 9 , a method for preparing reinforced polypropylene engineering plastics comprises the following specific steps:

[0060] S1: adjusting the rotation speed of the screw conveyor 109 at different positions according to the raw material ratio;

[0061] S2: preparing the raw materials required for the reinforced polypropylene engineering plastic, weighing them respectively, and placing them into different elastic rubber sleeves 106;

[0062] S3: Cover the top plate 104 and rotate the top plate 104 to insert the card 110 into the card slot 111;

[0063] S4: The top plate 104 pushes the material into the hopper 101, and the material is heated and melted by the heat transfer oil in the heat transfer chamber 1 314;

[0064] S5: The screw conveyor 109 pushes the molten material into the screw extruder 2 for mixing, and the material is extruded between the upper mold body 4 and the lower mold body 5 under the action of the screw extruder 2;

[0065] S6: cooling;

[0066] S7: Open the upper mold body 4 and take out the workpiece.

[0067] Reference Fig. 9 In a preferred embodiment, S6, cooling comprises the following specific steps:

[0068] S61: After the extrusion is completed, the linear guide rail 303 drives the slider 304 to move upward slowly;

[0069] S62: pre-cooling the upper mold body 4 and the lower mold body 5 by means of the heat dissipation fins 313 and the blower fan 305;

[0070] S63: Rapidly cool the mold body 4 and the lower mold body 5 by contacting with the cold pipe body 306 .

[0071] Working principle: The heat transfer mechanism 3 mainly provides circulation heating and cooling for the heat transfer oil and coolant in the heat pipe body 302 and the cold pipe body 306 through the circulation heater 318 and the condenser 307, and makes the two flow inside the heat pipe body 302 and the cold pipe body 306 respectively, wherein the heat transfer oil first enters the bottom end of the plurality of heat transfer chambers 1 314, and as the amount of heat transfer oil entering increases, the liquid level gradually rises, and after filling the heat transfer chamber 1 314, it enters the heat transfer chamber 2 316 through the connecting pipe 2 315, fills the heat transfer chamber 2 316, and extends the flow path under the setting of the plurality of baffles 317, so that the heat transfer oil can flow with the spiral extruder 314. The heat transfer oil passes through the second heat transfer chamber 316 into the heat pipe body 302, fills the heat pipe body 302, and flows back to the circulation heater 318 to realize circulation heating. During the entire flow of the heat transfer oil, its heat will decrease one by one, which can successively meet the required temperature of melting the raw materials, ensuring the fluidity of the raw materials, and avoiding the solidification of the raw materials, thereby ensuring the melting requirements, fluidity, and mixing of the raw materials during the feeding process, and avoiding the solidification of the raw materials that first enter the upper mold body 4 and the lower mold body 5 and affect the quality of the finished product. At the same time, based on the use of the same heating path, it also plays a role in saving costs. In addition, the cold The condenser 307 drives the coolant to circulate in the cold pipe body 306, and the bent heat pipe body 302 is located directly above the cold pipe body 306, and the hollow heat conductive block 312 is used as a partition and support between the two. When the injection is completed, the linear guide 303 drives the slider 304 to move up along the linear guide 303, so that the outer wall of the heat pipe body 302 gradually separates from the heat conductive groove 301 on the upper mold body 4 and the lower mold body 5, and the heat conductive groove 301 first contacts the hollow heat conductive block 312, and the residual heat on the heat conductive groove 301 contacts the hollow heat conductive block 312, and the heat dissipation area is increased based on the setting of the heat dissipation fins 313, and the fan 305 is used to dissipate the heat. The upward blowing takes away the heat on the heat dissipation fins 313, causing the temperature on the heat conduction groove 301 to drop rapidly, and then contacting the outer wall of the cold tube body 306, thereby increasing the heat dissipation efficiency and rapidly cooling the upper mold body 4 and the lower mold body 5, thereby achieving rapid cooling inside the upper mold body 4 and the lower mold body 5, accelerating the solidification of the polypropylene plastic, and optimizing the work efficiency by reducing the time required for cooling. At the same time, during the cooling process, the transition of the hollow heat conduction block 312 and the heat dissipation fins 313 can avoid the heat conduction groove 301 from being quenched, which affects the brittleness of the upper mold body 4 and the lower mold body 5 and increases the risk of breakage under long-term use, and also provides effective protection for the cold tube body 306.

[0072] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reinforced polypropylene engineering plastic processing device, comprising a screw extruder (2), a feeding mechanism (1) located at the top of the screw extruder (2), a heat conduction mechanism (3) located outside the screw extruder (2), an upper mold body (4) and a lower mold body (5) located at the output end of the screw extruder (2), characterized in that: The upper mold body (4) and the lower mold body (5) are combined, and a mold support frame (6) is supported at the bottom end of the lower mold body (5), and the bottom end of the mold support frame (6) is fixedly connected to a base (7); The heat conduction mechanism (3) comprises a heat pipe body (302) and a cold pipe body (306), and the heat pipe body (302) is filled with heat conduction oil, and the cold pipe body (306) is filled with cooling liquid. A plurality of hollow heat conduction blocks (312) are connected between the heat pipe body (302) and the cold pipe body (306), and a connecting plate (311) is connected between two adjacent hollow heat conduction blocks (312). A plurality of sliders (304) are fixedly connected to the outside of the connecting plate (311), and a plurality of linear guide rails (303) are arranged at the top end of the base (7), and the plurality of sliders (304) are correspondingly and movably connected to the plurality of linear guide rails (303); The upper mold body (4) and the lower mold body (5) are provided with a plurality of heat-conducting grooves (301) at equal intervals, and the heat pipe body (302) and the cold pipe body (306) are movably fitted in the plurality of heat-conducting grooves (301); the input end and the output end of the cold pipe body (306) are connected to the condenser (307) through the hose 1 (308); the input end and the output end of the heat pipe body (302) are connected to the heat-conducting chamber 2 (316) and the circulation heater (318) through the hose 2 (309), respectively; and the input end and the output end of the cold pipe body (306) are connected to the condenser (307) at the same time; The heat-conducting bin 2 (316) surrounds the outer side of the rear end of the screw extruder (2), and a plurality of baffles (317) are staggeredly arranged in the heat-conducting bin 2 (316), the inner wall on the other side of the heat-conducting bin 2 (316) is tightly connected to a plurality of connecting pipes 2 (315), and the output end of the connecting pipes 2 (315) is connected to a plurality of heat-conducting bins 1 (314), the plurality of heat-conducting bins 1 (314) surround the outside of the feeding mechanism (1) and are connected to each other, and the inner wall at the bottom end of the heat-conducting bin 1 (314) is connected to a circulation heater (318); The inner wall of each hollow heat-conducting block (312) is provided with a plurality of heat-dissipating fins (313) at equal intervals, and a plurality of blower fans (305) are installed at the top of the base (7), with the output ends of the blower fans (305) facing the heat-dissipating fins (313).

2. The enhanced polypropylene engineering plastic processing equipment according to claim 1, characterized in that: The heat pipe body (302) and the cold pipe body (306) are repeatedly bent structures, and are bent into a plurality of longitudinal pipe bodies arranged in parallel. Two longitudinal pipe bodies arranged in parallel are movably fitted in each of the heat conduction grooves (301). The top and bottom ends of each of the hollow heat conduction blocks (312) are respectively fixedly connected with a fixing hook (310), and the fixing hook (310) is connected to the connection between the two longitudinal pipe bodies in the heat pipe body (302) and the cold pipe body (306).

3. The enhanced polypropylene engineering plastic processing equipment according to claim 1, characterized in that: The top and bottom inner walls of the two adjacent heat transfer bins (314) are respectively connected to a horizontal bin (320), the connecting pipe (315) is connected to the inner wall of the horizontal bin (320) located at a higher position, the inner wall of the horizontal bin (320) located at a lower position is connected to a connecting pipe (319), and the connecting pipe (319) is connected to the circulation heater (318).

4. The enhanced polypropylene engineering plastic processing equipment according to claim 1, characterized in that: An injection port (9) is provided at the connection between the upper mold body (4) and the lower mold body (5), an injection pipe (8) is installed at the output end of the screw extruder (2), and the output end of the injection pipe (8) is tightly connected to the injection port (9).

5. The enhanced polypropylene engineering plastic processing equipment according to claim 1, characterized in that: The feeding mechanism (1) comprises a plurality of connecting tubes (102), and the plurality of connecting tubes (102) are simultaneously connected to the inner wall of the top end of the screw extruder (2), the inner wall of the top end of each connecting tube (102) is tightly connected to a funnel (101), and a heat transfer chamber (314) is arranged around the outside of the funnel (101).

6. The enhanced polypropylene engineering plastic processing equipment according to claim 5, characterized in that: The top inner wall of each of the funnels (101) is fixedly connected to a transition bin (108), and the top outer wall of the transition bin (108) is fixedly connected to an annular support plate 1 (107), the top of the annular support plate 1 (107) is fixedly connected to an elastic rubber sleeve (106), and the top of the elastic rubber sleeve (106) is fixedly connected to an annular support plate 2 (113), and a screw conveyor (109) is installed in each of the funnels (101), and the screw conveyor (109) includes a driving end connected to the inner wall of the funnel (101).

7. The enhanced polypropylene engineering plastic processing equipment according to claim 6, characterized in that: The inner wall of the funnel (101) is fixedly connected with a covering cover (114), and the covering cover (114) covers the top of the driving end. The top of the annular support plate 2 (113) is penetrated by a plurality of limiting plug holes (115). The top of the annular support plate 1 (107) is equidistantly provided with a plurality of limiting plug rods (105), and the plurality of limiting plug rods (105) are movably inserted into the limiting plug holes (115).

8. The enhanced polypropylene engineering plastic processing equipment according to claim 7, characterized in that: The top of the annular support plate 2 (113) is fixedly connected with a plurality of slots (111), and each slot (111) is respectively provided with a through slot (112), and each slot (111) is respectively provided with a card (110) in it, and the plurality of cards (110) are equidistantly arranged around the outer periphery of the top plate (104), and a handle (103) is installed on the outer wall at the top of the top plate (104).

9. A method for preparing enhanced polypropylene engineering plastics, applied to the enhanced polypropylene engineering plastics processing equipment according to claim 8, characterized in that: The specific steps include: S1: adjusting the rotation speed of the screw conveyor (109) at different positions according to the raw material ratio; S2: preparing the raw materials required for the reinforced polypropylene engineering plastic, weighing them respectively, and placing them into different elastic rubber sleeves (106); S3: Cover the top plate (104), rotate the top plate (104) to insert the card (110) into the card slot (111); S4: The top plate (104) pushes the material into the hopper (101), where it is heated and melted by the heat transfer oil in the heat transfer chamber 1 (314); S5: The screw conveyor (109) pushes the molten material into the screw extruder (2) for mixing, and the material is extruded between the upper mold body (4) and the lower mold body (5) under the action of the screw extruder (2); S6: cooling; S7: Open the upper mold body (4) and remove the workpiece.

10. The method for preparing the reinforced polypropylene engineering plastic according to claim 9, characterized in that: The step S6, cooling down comprises the following specific steps: S61: After extrusion is completed, the linear guide rail (303) drives the slider (304) to move upward at a slow speed; S62: pre-cooling the upper mold body (4) and the lower mold body (5) by means of the heat dissipation fins (313) and the blower fan (305); S63: Rapidly cool the mold body (4) and the lower mold body (5) by contacting with the cold pipe body (306).

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