An automatic injection molding equipment for automobile plastic parts

Abstract

The invention discloses an automatic injection molding device for automobile plastic parts, comprising a frame, a heat sink is installed at the upper end of the bottom of the frame, a bottom mold is installed at the upper end of the heat sink, a lifting cylinder is installed at the lower end of the top of the frame, a top mold is installed at the output end of the lifting cylinder, and an injection molding tube is installed on the top mold. The heat sink comprises a bottom block two and a bottom block one which are fixedly connected up and down, a groove one and a groove two which are arranged up and down at the center of the bottom block two, a slide plate one which slides up and down is installed in the groove one, a slide plate two which slides up and down is installed in the groove two, an air guide groove is provided at the upper end of the slide plate two, an inlet two which is connected with the air guide groove is provided on the bottom block two, an air charging pipe which is connected with the air guide groove is also installed at the upper end of the slide plate two, and the upper end of the air charging pipe runs through the bottom end of the bottom mold, and a lifting system one for controlling the movement of the slide plate two and a lifting system two for controlling the movement of the slide plate one are also provided on the heat sink, which are helpful to realize the enhanced cold shrinkage effect on the multi-point domain area of ​​the bottom end surface of the injection molding body, and improve the efficiency and quality of the separation of the injection molding body from the bottom mold.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts production, in particular to an automatic injection molding device for automobile plastic parts. Background Art

[0002] Auto parts are the key components of the entire car, and they each have different functions and tasks to ensure the normal operation and excellent performance of the car. Among them, the engine, transmission and brake system parts all rely on precise manufacturing technology and high-quality materials to ensure their efficiency and durability. The molten plastic material is injected into the mold cavity and cooled and solidified to form the desired part shape.

[0003] At present, during the use of the existing injection mold, the molten plastic is injected into the column cavity and then cooled. After cooling, the injection molded parts are generally clamped and taken out directly. However, there is a certain viscosity between the injection molded parts and the bottom mold, and the attraction between the contact surface of the injection molded parts and the bottom mold is relatively large, resulting in the separation between the cooled injection molded parts and the bottom mold not being smooth enough, or even difficult to separate. Moreover, residues are often prone to appear on the bottom of the bottom mold cavity, which causes defects in the injection molded parts and requires frequent cleaning of the bottom mold cavity.

[0004] Therefore, it is necessary to provide an automated injection molding device for automobile plastic parts to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an automated injection molding equipment for automobile plastic parts, comprising a frame, a heat sink is installed at the upper end of the bottom of the frame, a bottom mold is installed at the upper end of the heat sink, a lifting cylinder is installed at the lower end of the top of the frame, a top mold is installed at the output end of the lifting cylinder, and an injection molding tube is installed on the top mold, the heat sink comprises a bottom block 2 and a bottom block 1 fixedly connected up and down, a groove 1 and a groove 2 are arranged up and down at the center of the bottom block 2, a slide plate 1 sliding up and down is installed at the groove 1, a slide plate 2 sliding up and down is installed at the groove 2, an air guide groove is provided at the upper end of the slide plate 2, an inlet 2 connected to the air guide groove is provided on the bottom block 2, an air charging pipe connected to the air guide groove is also installed at the upper end of the slide plate 2, the upper end of the air charging pipe passes through the bottom end of the bottom mold, an air collecting box is installed at the center of the bottom block 1, an exhaust pipe located in the air charging pipe cavity is installed on the air collecting box, an outlet 2 is connected at the lower end of the air collecting box, and a lifting system 2 for controlling the movement of the slide plate 2 and a lifting system 1 for controlling the movement of the slide plate 1 are also provided on the heat sink.

[0006] Furthermore, the bottom block 2 is also respectively provided with an inlet 1 and an outlet 1, a slot cavity is formed between the upper end surface of the slide plate 1 and the bottom end surface of the bottom mold, and the inlet 1 and the outlet 1 are both connected to the slot cavity, and the inlet 1 and the outlet 1 are used to guide the cooling fluid.

[0007] Furthermore, the bottom block 2 is also provided with an inlet 3 and an outlet 3, respectively. The inlet 3 and the outlet 3 are also connected to the slit cavity. The inlet 3 and the outlet 3 are used to guide the heating fluid.

[0008] Furthermore, the lower end surface of the bottom mold is provided with a lower inclined surface, and the upper end surface of the slide plate is provided with an upper inclined surface.

[0009] Furthermore, a plug is installed at the upper end of the exhaust pipe, and a circumferentially evenly distributed block is installed at the upper end of the exhaust pipe, and an air inlet hole connected to the exhaust pipe cavity is provided between adjacent block.

[0010] Furthermore, the inflation pipe sleeve is arranged on the outside of the exhaust pipe wall, and a second block located between adjacent first blocks is installed on the upper end of the inflation pipe, and an axially penetrating airway is arranged on the inflation pipe wall between adjacent second blocks.

[0011] Furthermore, a heat sink is installed at the lower end of the air collecting box, the upper end of the heat sink extends into the interior of the air collecting box, and the lower end of the heat sink extends out of the air collecting box.

[0012] Furthermore, the surface of the heat dissipation plate inside the air collecting box is provided with diffusion holes.

[0013] Furthermore, the lifting system 2 includes an annular groove 2 arranged at the upper end of the bottom block 1, and the groove 2 is provided with a guide hole 2 connected to the annular groove 2. The lower end of the slide plate 2 is equipped with a guide column 2 slidingly connected to the guide hole 2, and the lower end of the annular groove 2 is also connected to an oil port 2.

[0014] Furthermore, the lifting system includes an annular groove arranged at the upper end of a bottom block, a guide hole connected to the annular groove is provided on the groove, a guide column slidably connected to the guide hole is installed at the lower end of the slide plate, and an oil port is also connected to the lower end of the annular groove.

[0015] Compared with the prior art, the present invention provides an automated injection molding device for automobile plastic parts, which has the following beneficial effects:

[0016] In the present invention, a lifting system is used to control a slide plate to move downward and separate from the bottom mold. At the same time, an inlet three and an outlet three are used to control a heating fluid to continuously flow through the slit cavity to heat the bottom mold, thereby achieving an insulation effect on the liquid plastic initially entering the injection cavity, ensuring the fluidity of the liquid plastic entering the injection cavity, so that the liquid plastic is completely filled into the injection cavity, thereby avoiding cooling of the liquid plastic when initially entering the injection cavity, avoiding affecting the fluidity of the liquid plastic in the injection cavity, resulting in failure to fully and comprehensively fill the injection cavity with the liquid plastic. After completion, the slide plate is reset and then controlled by a lifting system to move downward and separate from the bottom mold. At the same time, an inlet one and an outlet one are used to control a cooling fluid to continuously flow through the slit cavity to cool the bottom mold, thereby cooling the injection molded body in the injection cavity until it is cooled to a solid state.

[0017] In the present invention, the second lifting system is used to control the second slide plate to move downward, thereby driving the inflation tube to move downward, and the continuous flow of gas is controlled by the second inlet and the second outlet. The gas performs multi-point hedging on the solid injection molded body until gas flows out between the injection molded body and the bottom mold, and the cooling effect at this point is higher. The thermal expansion and contraction degree of this point area is different from that of other areas, which is conducive to the gradual separation of the injection molded body and the bottom mold. Through the hedging and impact effect of the gas, the impact force and impact softness of the injection molded body can be better controlled, so that the separation of the injection molded body and the bottom mold is safer, the separation effect is higher, and the separation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the structure of the heat sink and the bottom mold in the present invention;

[0020] Figure 3 For the present invention Figure 2 AA cross-sectional structural diagram;

[0021] Figure 4 For the present invention Figure 2 BB cross-sectional structure diagram;

[0022] Figure 5 For the present invention Figure 2 Schematic diagram of CC cross-section;

[0023] Figure 6 It is a schematic diagram of the structure of the heat dissipation plate in the present invention;

[0024] Figure 7 It is a structural schematic diagram of the bottom block 2 in the present invention;

[0025] Figure 8 It is a structural schematic diagram of the upper inclined surface in the present invention;

[0026] Fig. 9 It is a structural schematic diagram of the lower slope in the present invention;

[0027] Fig.10 It is a structural schematic diagram of the air guide groove in the present invention;

[0028] Fig.11 Schematic diagram of the distribution structure of the exhaust pipe in the present invention;

[0029] Fig.12 It is a schematic diagram of the structure of the inflation pipe and the exhaust pipe in the present invention;

[0030] Fig.13 for Figure 6 A schematic diagram of the enlarged structure of the D portion;

[0031] In the figure: 1, frame; 2, heat sink; 3, bottom mold; 4, lifting cylinder; 5, top mold; 6, injection tube; 7, exhaust pipe; 8, inflation tube; 9, inlet 1; 10, outlet 1; 11, inlet 2; 12, outlet 2; 13, inlet 3; 14, outlet 3; 15, lifting system 2; 16, lifting system 1; 17, heat sink; 21, bottom block 1; 22, bottom block 2; 23, slide plate 1; 24, slide plate 2; 25, air collecting box; 2 11. Ring groove one; 212. Ring groove two; 2111. Oil port one; 2121. Oil port two; 221. Groove one; 222. Groove two; 2211. Guide hole one; 2221. Guide hole two; 31. Upper inclined surface; 231. Guide column one; 232. Lower inclined surface; 241. Air guide groove; 242. Guide column two; 71. Plug; 72. Block one; 73. Air inlet; 81. Air duct; 82. Block two; 171. Dispersion hole. DETAILED DESCRIPTION

[0032] Reference Figure 1-Figure 13The present invention provides a technical solution: an automatic injection molding equipment for automobile plastic parts, comprising a frame 1, a heat sink 2 is installed at the upper end of the bottom of the frame 1, a bottom mold 3 is installed at the upper end of the heat sink 2, a lifting cylinder 4 is installed at the lower end of the top of the frame 1, a top mold 5 is installed at the output end of the lifting cylinder 4, an injection tube 6 is installed on the top mold 5, the heat sink 2 comprises a bottom block 22 and a bottom block 1 21 fixedly connected up and down, a groove 1 221 and a groove 222 arranged up and down are provided at the center of the bottom block 22, a slide plate 23 sliding up and down is installed on the groove 221, and a slide plate 23 sliding up and down is installed on the groove 222 A slide plate 24 slides up and down, an air guide groove 241 is provided at the upper end of the slide plate 24, an inlet 11 connected to the air guide groove 241 is provided on the bottom block 22, an air charging pipe 8 connected to the air guide groove 241 is also installed at the upper end of the slide plate 24, and the upper end of the air charging pipe 8 passes through the bottom end of the bottom mold 3, an air collecting box 25 is installed at the center of the bottom block 1, an exhaust pipe 7 located in the tube cavity of the air charging pipe 8 is installed on the air collecting box 25, and an outlet 12 is connected to the lower end of the air collecting box 25, and a lifting system 15 for controlling the movement of the slide plate 24 and a lifting system 16 for controlling the movement of the slide plate 1 23 are also provided on the heat sink 2;

[0033] Combination Figure 3-4 As shown, when the slide plate 23 moves downward to contact the bottom of the annular groove 211, and the slide plate 24 moves upward to contact the lower end of the slide plate 13, the upper end surface of the inflation tube 8, the upper end surface of the exhaust pipe 7 and the bottom surface of the mold cavity of the bottom mold 3 are arranged flush, thereby ensuring that the bottom surface of the mold cavity of the bottom mold 3 is in a sealed state, so that the top mold 5 and the bottom mold 3 cooperate to form an injection cavity.

[0034] In this embodiment, the bottom block 22 is also provided with an inlet 9 and an outlet 10, respectively. A slit cavity is formed between the upper end surface of the slide plate 23 and the bottom end surface of the bottom mold 3. The inlet 9 and the outlet 10 are both connected to the slit cavity. The inlet 9 and the outlet 10 are used to guide the cooling fluid. Figure 3 As shown, in this embodiment, when the slide plate 23 moves downward, the volume of the slot cavity increases. At this time, the cooling fluid is introduced into the slot cavity through the inlet 9 to cool the bottom mold 3, and then it is led out through the outlet 10.

[0035] In the present embodiment, the bottom block 22 is also provided with an inlet 3 13 and an outlet 3 14, which are also connected to the slit cavity, and are used to guide the heating fluid. In the present embodiment, when the slide plate 23 moves downward, the volume of the slit cavity increases. At this time, the heating fluid is introduced into the slit cavity through the inlet 3 13, so that the bottom mold 3 can be heated and then led out through the outlet 3 14. It should be noted that before the cooling fluid or the heating fluid is introduced into the slit cavity, the lifting system 16 is required to control the slide plate 23 to move upward until it contacts the bottom end surface of the bottom mold 3, so as to discharge the remaining heating fluid or the cooling fluid in the slit cavity to avoid mixing of the cooling fluid and the heating fluid.

[0036] In this embodiment, the lower end surface of the bottom mold 3 is provided with a lower inclined surface 31, and the upper end surface of the slide plate 23 is provided with an upper inclined surface 232, so as to allow the cooling fluid or the heating fluid to be introduced into or guided out of the slit cavity.

[0037] In this embodiment, a plug 71 is installed at the upper end of the exhaust pipe 7, and a circumferentially evenly distributed block 72 is installed at the upper end of the exhaust pipe 7, and an air inlet 73 connected to the cavity of the exhaust pipe 7 is provided between adjacent block 72; Fig.12 As shown, after the injection molding is completed, the injection molded body is cooled to form a solid state, and the injection molded body still has residual temperature. In this embodiment, the blocking blocks 72 are arranged in four groups, and the spaces between adjacent blocking blocks 72 form guide openings for four directions. When the inflation tube 8 moves downward, the inflation tube 8 introduces gas to the upper end of the exhaust pipe 7. Under the guidance of the guide opening, the gas impacts the contact surface between the injection molded body and the bottom mold 3, thereby promoting the injection molded body to separate from the bottom mold 3. Among them, by combining the control of the cooling temperature of the gas introduced by the inflation tube 8 and the distribution arrangement of the inflation tube 8 on the bottom mold 3, the bottom of the injection molded body on the bottom mold 3 can be subjected to multi-point domain form and uniform cooling impact, combined with the effect of cooling shrinkage, which is conducive to making the injection molded body easily, smoothly, neatly, quickly and efficiently separated from the bottom mold 3. Among them, the distribution arrangement of the inflation tube 8 on the bottom mold 3 can be further reasonably arranged according to the required structural form of the injection molded body, thereby further improving the separation effect of the injection molded body and the bottom mold 3.

[0038] In this embodiment, the inflation pipe 8 is sleeved on the outer side of the exhaust pipe 7, and a second block 82 located between adjacent first blocks 72 is installed on the upper end of the inflation pipe 8. An axially penetrating airway 81 is provided on the wall of the inflation pipe 8 between adjacent second blocks 82. Fig.12 As shown, the air channel 81 is used to guide the gas into the guide opening area. When the block 1 72 and the block 2 82 are matched, the block 1 72, the block 2 82 and the bottom surface of the mold cavity of the bottom mold 3 are flush.

[0039] In this embodiment, a heat sink 17 is installed at the lower end of the gas collecting box 25. The upper end of the heat sink 17 extends into the interior of the gas collecting box 25, and the lower end of the heat sink 17 extends out of the gas collecting box 25 to cool and dissipate the gas discharged from the exhaust pipe 7.

[0040] In this embodiment, the plate surface of the heat sink 17 inside the gas collecting box 25 is provided with diffusion holes 171 so that the gas inside the gas collecting box 25 can be fully mixed and contact the heat sink 17, thereby improving the heat transfer efficiency of the heat sink 17.

[0041] In this embodiment, the lifting system 15 includes an annular groove 212 arranged at the upper end of the bottom block 21, and the groove 222 is provided with a guide hole 2221 connected to the annular groove 212. The lower end of the slide plate 24 is equipped with a guide column 242 slidingly connected to the guide hole 2221. The lower end of the annular groove 212 is also connected to an oil port 2121. The amount of hydraulic oil in the annular groove 212 is controlled by the oil port 2121, so as to control the lifting and lowering of the guide column 242, thereby controlling the up and down movement of the slide plate 24.

[0042] In this embodiment, the lifting system 16 includes an annular groove 211 arranged at the upper end of the bottom block 21, and a guide hole 2211 connected to the annular groove 211 is provided on the groove 221. A guide column 231 slidably connected to the guide hole 2211 is installed at the lower end of the slide plate 23. The lower end of the annular groove 211 is also connected to an oil port 2111. The amount of hydraulic oil in the annular groove 211 is controlled by the oil port 2111 to control the lifting and lowering of the guide column 231, thereby controlling the up and down movement of the slide plate 23.

[0043] In specific implementation, it includes the following steps:

[0044] Step 1: The lifting cylinder 4 controls the top mold 5 to cooperate with the bottom mold 3 to form an injection cavity, and the lifting system 16 controls the slide plate 23 to move downward and separate from the bottom mold 3. At the same time, the heating fluid is controlled to flow through the slit cavity through the inlet 3 13 and the outlet 3 14 to heat the bottom mold 3, thereby keeping the liquid plastic initially entering the injection cavity warm and ensuring the fluidity of the liquid plastic entering the injection cavity, so that the liquid plastic can be completely filled into the injection cavity, thereby avoiding cooling of the liquid plastic when it initially enters the injection cavity, avoiding affecting the fluidity of the liquid plastic in the injection cavity, and causing the liquid plastic to fail to be fully and comprehensively filled into the injection cavity;

[0045] Step 2: Injection is performed into the injection cavity through the injection tube 6. After the injection is completed, the inlet 3 13 and the outlet 3 14 are closed. At the same time, the slide plate 23 is controlled to move upward through the lifting system 16 to contact the bottom mold 3 to discharge the heating fluid in the slit cavity;

[0046] Step 3: The lifting system 16 controls the slide plate 23 to move downward and separate from the bottom mold 3. At the same time, the cooling fluid is controlled to continuously flow through the slit cavity through the inlet 9 and the outlet 10 to cool the bottom mold 3, thereby cooling the injection molded body in the injection molding cavity until the injection molded body is cooled to a solid state.

[0047] Step 4: The lifting system 15 controls the slide plate 24 to move downward, driving the inflation tube 8 to move downward, and controls the continuous flow of gas through the inlet 11 and the outlet 12. The gas performs multi-point domain impact on the solid-state injection molded body until gas flows out between the injection molded body and the bottom mold 3. As a preferred embodiment, the degree of separation between the injection molded body and the bottom mold 3 can be judged by monitoring the pressure of the inflation tube 8 and the exhaust pipe 7, and the cooling effect at this point domain is higher. This point domain area has a different degree of thermal expansion and contraction from other areas, which is conducive to the gradual separation of the injection molded body and the bottom mold 3. Through the impact effect of the gas impact, the impact strength and impact softness of the injection molded body can be better controlled, so that the separation of the injection molded body and the bottom mold 3 is safer, the separation effect is higher, and the separation efficiency is high;

[0048] Step 5: After the injection molding body is separated from the bottom mold 3, the second inlet 11 and the second outlet 12 are closed, and the lifting system 15 controls the second slide plate 24 to move upward, so that the inflation tube 8 moves up and resets, waiting for the next automatic injection molding.

[0049] The above description is only a preferred specific implementation manner of the 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 invention, which should be covered by the protection scope of the present invention.

Claims

1. An automated injection molding device for automobile plastic parts, comprising a frame (1), characterized in that: The upper bottom end of the frame (1) is provided with a heat sink (2), the upper end of the heat sink (2) is provided with a bottom mold (3), the lower top end of the frame (1) is provided with a lifting cylinder (4), the output end of the lifting cylinder (4) is provided with a top mold (5), the top mold (5) is provided with an injection molding tube (6), the heat sink (2) comprises a bottom block 2 (22) and a bottom block 1 (21) which are fixedly connected up and down, the center of the bottom block 2 (22) is provided with a groove 1 (221) and a groove 2 (222) which are arranged up and down, the groove 1 (221) is provided with a slide plate 1 (23) which slides up and down, the groove 2 (222) is provided with a slide plate 2 (24) which slides up and down, the upper end of the slide plate 2 (24) is provided with a bottom block 2 (221) which is fixedly connected up and down, An air guide groove (241) is provided, an inlet port (11) connected to the air guide groove (241) is provided on the bottom block (22), an air charging pipe (8) connected to the air guide groove (241) is also installed on the upper end of the slide plate (24), the upper end of the air charging pipe (8) passes through the bottom end of the bottom mold (3), an air collecting box (25) is installed at the center of the bottom block (21), an exhaust pipe (7) located in the tube cavity of the air charging pipe (8) is installed on the air collecting box (25), and the lower end of the air collecting box (25) is connected to the outlet port (12), and the heat sink (2) is also provided with a lifting system (15) for controlling the movement of the slide plate (24) and a lifting system (16) for controlling the movement of the slide plate (23).

2. The automatic injection molding equipment for automobile plastic parts according to claim 1, characterized in that: The bottom block 2 (22) is also provided with an inlet 1 (9) and an outlet 1 (10), respectively. A slot cavity is formed between the upper end surface of the slide plate 1 (23) and the bottom end surface of the bottom mold (3). The inlet 1 (9) and the outlet 1 (10) are both connected to the slot cavity. The inlet 1 (9) and the outlet 1 (10) are used to guide the cooling fluid.

3. The automatic injection molding equipment for automobile plastic parts according to claim 2, characterized in that: The bottom block 2 (22) is also provided with an inlet 3 (13) and an outlet 3 (14), which are also connected to the slit cavity. The inlet 3 (13) and the outlet 3 (14) are used to guide the heating fluid.

4. The automatic injection molding equipment for automobile plastic parts according to claim 2, characterized in that: The lower end surface of the bottom mold (3) is provided with a lower inclined surface (31), and the upper end surface of the slide plate 1 (23) is provided with an upper inclined surface (232).

5. The automatic injection molding equipment for automobile plastic parts according to claim 1, characterized in that: A plug (71) is installed at the upper end of the exhaust pipe (7), and circumferentially evenly distributed blocking blocks (72) are installed at the upper end of the exhaust pipe (7), and air inlet holes (73) connected to the lumen of the exhaust pipe (7) are provided between adjacent blocking blocks (72).

6. The automatic injection molding equipment for automobile plastic parts according to claim 5, characterized in that: The inflation pipe (8) is sleeved on the outside of the wall of the exhaust pipe (7); a second block (82) located between adjacent first blocks (72) is installed at the upper end of the inflation pipe (8); and an air passage (81) is axially penetrated through the wall of the inflation pipe (8) between adjacent second blocks (82).

7. The automated injection molding equipment for automobile plastic parts according to claim 1, characterized in that: A heat sink (17) is installed at the lower end of the air collecting box (25); the upper end of the heat sink (17) extends into the interior of the air collecting box (25), and the lower end of the heat sink (17) extends out of the air collecting box (25).

8. The automatic injection molding equipment for automobile plastic parts according to claim 7, characterized in that: The plate surface of the heat dissipation plate (17) inside the air collecting box (25) is provided with diffusion holes (171).

9. The automated injection molding equipment for automobile plastic parts according to claim 1, characterized in that: The lifting system 2 (15) comprises an annular groove 2 (212) arranged at the upper end of the bottom block 1 (21), a guide hole 2 (2221) connected to the annular groove 2 (212) is arranged on the groove 2 (222), a guide column 2 (242) slidably connected to the guide hole 2 (2221) is installed at the lower end of the slide plate 2 (24), and the lower end of the annular groove 2 (212) is also connected to the oil port 2 (2121).

10. The automated injection molding equipment for automobile plastic parts according to claim 1, characterized in that: The lifting system (16) comprises an annular groove (211) arranged at the upper end of a bottom block (21), a groove (221) provided with a guide hole (2211) connected to the annular groove (211), a guide column (231) slidably connected to the guide hole (2211) is installed at the lower end of a slide plate (23), and an oil port (2111) is also connected to the lower end of the annular groove (211).

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