Injection molding method and injection molding system

Abstract

The invention relates to the technical field of plastic products, in particular to an injection molding method and an injection molding system. The injection molding system comprises a bottom mold, a movable mold is slidably connected to the left side of the bottom mold, annular grooves are formed in the bottom mold and the movable mold, a plurality of circular grooves are formed in the two annular grooves, the injection molding system further comprises a support, a storage bin is fixedly connected to the upper side of the support, an extrusion bin is fixedly connected to the right side of the storage bin, and an extrusion opening is formed in the right portion of the extrusion bin. The method comprises the steps that 1, injection molding raw materials are added into the storage bin, and the hydraulic cylinder is started to push the injection molding raw materials into the extrusion bin; 2, a hydraulic rod is started to push a bottom die and a movable die leftwards, and meanwhile, an annular groove and an extrusion opening are opened; 3, the annular groove and the extrusion opening are controlled to be in the same plane through a positioning plate; 4, pushing the injection molding raw material to enter the annular groove through the extrusion opening for injection molding; 5, starting a motor to drive the bottom mold and the movable mold to rotate during injection molding; and 6, after injection molding is completed, the hydraulic rod retracts, meanwhile, the annular groove and the extrusion opening are closed, and the mold can be conveniently and completely filled with molten plastic during injection molding.

Description

Technical Field

[0001] This invention relates to the field of plastic products technology, and more specifically to an injection molding method and injection molding system. Background Technology

[0002] Injection molding is a method of shaping industrial products, usually divided into rubber injection molding and plastic injection molding; plastic injection molding refers to the process of injecting molten plastic into a plastic product mold under pressure, and then cooling and solidifying it to obtain various plastic parts as needed.

[0003] During the injection molding process, when the injection molded part is too large or has a complex structure, the molten plastic will have difficulty flowing after being injected into the mold, resulting in the plastic not being able to completely fill the mold, leading to various defects in the injection molded product, and thus affecting the yield of the injection molded part. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an injection molding method and injection molding system, the beneficial effect of which is that the molten plastic can be completely filled into the mold during injection molding.

[0005] An injection molding system includes a bottom mold, a moving mold slidably connected to the left side of the bottom mold, annular grooves being formed on both the left side of the bottom mold and the right side of the moving mold, and multiple circular grooves being formed in each of the two annular grooves. The system also includes a support, a storage bin being fixedly connected to the upper side of the support, an extrusion bin being fixedly connected to the right side of the storage bin, and an extrusion port being formed on the right side of the extrusion bin.

[0006] A hydraulic cylinder is fixedly connected to the left side of the support, and a push plate is fixedly connected to the right side of the hydraulic cylinder. The push plate is slidably connected inside the storage bin.

[0007] A sliding rod is slidably connected to the right side of the bracket, and the left end of the sliding rod is fixed to the right end of the bottom mold. A hydraulic rod is fixed to the right side of the bracket, and the end of the hydraulic rod is fixed to the right end of the sliding rod.

[0008] A motor is fixedly connected to the right side of the bracket, and a gear is rotatably connected to the right side of the bracket. The motor drives the gear to rotate. Multiple tooth grooves are opened inside the slide rod, and all of the multiple tooth grooves mesh with the gear.

[0009] An injection molding method using an injection molding system, the method comprising the following steps:

[0010] S1: Add injection molding material into the storage hopper and start the hydraulic cylinder to push the injection molding material into the extrusion chamber;

[0011] S2: Activate the hydraulic rod to push the bottom mold and moving mold to the left, while opening the annular groove and extrusion port;

[0012] S3: The positioning plate controls the annular groove and the extrusion port to be on the same plane;

[0013] S4: Push the injection molding material through the extrusion port into the annular groove for injection molding;

[0014] S5: During injection molding, the motor is started to drive the bottom mold and the moving mold to rotate;

[0015] S6: After injection molding is completed, the hydraulic rod retracts, simultaneously sealing the annular groove and the extrusion port. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 This is a schematic diagram of the injection molding system in this invention;

[0018] Figure 2 This is a cross-sectional view of the injection molding system in this invention;

[0019] Figure 3 In this invention Figure 2 A magnified view of a portion of the image;

[0020] Figure 4 This is a schematic diagram of the structure of the bottom mold and the moving mold in this invention;

[0021] Figure 5 This is a cross-sectional view of the bottom mold and the moving mold in this invention;

[0022] Figure 6 This is a schematic diagram of the support structure in this invention;

[0023] Figure 7 This is a schematic diagram of the structure of the storage silo and the extrusion silo in this invention;

[0024] Figure 8 This is a cross-sectional view of the storage silo and extrusion silo in this invention;

[0025] Figure 9 This is a schematic diagram of the storage silo structure in this invention;

[0026] Figure 10 This is a schematic diagram of the extrusion chamber in this invention;

[0027] Figure 11 This is a partial cross-sectional view of the control tube in this invention;

[0028] Figure 12 This is a schematic diagram of the injection molding method in this invention.

[0029] In the figure: bottom mold 101; moving mold 102; annular groove 103; circular groove 104; baffle I 105; spring I 106;

[0030] 201 bracket; 202 gear; 203 motor; 204 slide bar; 205 hydraulic rod; 206 toothed groove; 207 hydraulic cylinder; 208 push plate;

[0031] Storage bin 301; baffle II 302; spring II 303;

[0032] Extrusion chamber 401; Extrusion port 402; Limiting plate 403;

[0033] Control tube 501; control shaft 502; positioning plate 503; positioning switch 504; spring Ⅲ 505. Detailed Implementation

[0034] like Figure 1-11 As shown, this example can achieve the effect of allowing molten plastic to completely fill the mold during injection molding.

[0035] The injection molding system includes a bottom mold 101, with a moving mold 102 slidably connected to its left side. Both the left side of the bottom mold 101 and the right side of the moving mold 102 have annular grooves 103, and multiple circular grooves 104 are formed within each of the two annular grooves 103. It also includes a support 201, with a storage bin 301 fixedly connected to its upper side. An extrusion bin 401 is fixedly connected to the right side of the storage bin 301, and an extrusion port 402 is formed on the right side of the extrusion bin 401. Both the bottom mold 101 and the moving mold 102 have internal cavities, thus forming an injection mold when they are fitted together. After the bottom mold 101 and the moving mold 102 separate, the injection molding process is complete. The product can be separated from the two, thus achieving demolding of the injection molded product; through the annular extrusion port 402 of the extrusion chamber 401, molten plastic can be injected into the annular groove 103 of the bottom mold 101 and the moving mold 102 simultaneously. Then, the molten plastic enters the mold through multiple circular grooves 104, thus achieving the effect of uniformly injecting molten plastic into the mold; after the molten plastic is injected into the mold, the bottom mold 101 is rotated, which drives the moving mold 102 to rotate, thereby causing the molten plastic to flow inside the mold, thus facilitating the uniform filling of the mold by the molten plastic, thus achieving the effect of facilitating the complete filling of the mold by the molten plastic during injection molding.

[0036] like Figure 1-11 As shown, this example can achieve the effect of injecting molten plastic into the bottom mold 101 and the moving mold 102.

[0037] Because a hydraulic cylinder 207 is fixedly connected to the left side of the support 201 in the injection molding system, and a push plate 208 is fixedly connected to the right side of the hydraulic cylinder 207, and the push plate 208 is slidably connected inside the storage bin 301; molten plastic is introduced into the storage bin 301, and the storage bin 301 is heated at the same time, thereby preventing the plastic in the storage bin 301 from solidifying, thereby ensuring that the plastic in the storage bin 301 is in a flowing molten state; the output end of the hydraulic cylinder 207 extends, thereby driving the push plate 208 to move to the right, thereby squeezing the molten plastic in the storage bin 301, and pushing the molten plastic into the extrusion chamber 401. The hydraulic cylinder 207 continues to push the push plate 208, thereby extruding the molten plastic in the extrusion chamber 401 through the extrusion port 402. At this time, the annular groove 103 of the bottom mold 101 and the moving mold 102 is aligned with the extrusion port 402, thereby achieving the effect of injecting molten plastic into the annular groove 103, and thus achieving the effect of injecting molten plastic into the bottom mold 101 and the moving mold 102.

[0038] like Figure 1-11 As shown, this example can achieve the effect of aligning the annular groove 103 with the extrusion port 402.

[0039] Because the right side of the support 201 in the injection molding system is slidably connected to the slide rod 204, the left end of the slide rod 204 is fixed to the right end of the bottom mold 101, and the right side of the support 201 is fixed to the hydraulic rod 205, the end of the hydraulic rod 205 is fixed to the right end of the slide rod 204; when the hydraulic rod 205 is activated, the output end of the hydraulic rod 205 moves to the left, thereby driving the slide rod 204 to move to the left, thereby driving the moving mold 101 to move to the left, thereby causing the bottom mold 101 and the moving mold 102 to fit together, thereby achieving the effect of assembling the mold; continuing to push the bottom mold 101 and the moving mold 102 to the left, thereby driving the annular groove 103 to move to the extrusion port 402, thereby achieving the effect of aligning the annular groove 103 and the extrusion port 402.

[0040] After injection molding is completed, the output end of the hydraulic rod 205 is moved to the right, which in turn drives the slide rod 204 to move to the right, which in turn drives the bottom mold 101 to move to the right. At the same time, the moving mold 102 is pushed to the right at the same speed. When both the bottom mold 101 and the moving mold 102 have moved out of the extrusion chamber 401, the bottom mold 101 continues to move to the right, while the moving mold 102 stops moving. Thus, the bottom mold 101 and the moving mold 102 separate, and the injection molded product can be separated from the two, thereby realizing the demolding of the injection molded product.

[0041] like Figure 1-11 As shown, this example can achieve the effect of rotating the bottom mold 101.

[0042] Because a motor 203 is fixedly connected to the right side of the bracket 201 in the injection molding system, and a gear 202 is rotatably connected to the right side of the bracket 201, the motor 203 drives the gear 202 to rotate. The slide rod 204 has multiple toothed grooves 206 inside, and all of the toothed grooves 206 mesh with the gear 202. When the motor 203 is started, the gear 202 is driven to rotate, which in turn drives the toothed grooves 206 to rotate, which in turn drives the slide rod 204 to rotate, which in turn drives the bottom mold 101 to rotate. Since the length of the toothed groove 206 is greater than the distance that the hydraulic rod 205 pushes the slide rod 204 to move, it is ensured that the gear 202 always meshes with the toothed groove 206, thus ensuring that the slide rod 204 can rotate after sliding, thereby achieving the effect of rotating the bottom mold 101.

[0043] like Figure 1-11 As shown, this example can achieve the effect of automatically opening and closing the annular groove 103.

[0044] Because a baffle I 105 is slidably connected to the outer side of the bottom mold 101 in the injection molding system, and a spring I 106 is fixedly connected between the baffle I 105 and the bottom mold 101, and a limiting plate 403 is fixedly connected to the right side of the extrusion port 402; the baffle I 105 blocks the annular groove 103, thereby closing the annular groove 103; during injection molding, the bottom mold 101 moves to the left, causing the spring I 106 to move to the left, which in turn causes the baffle I 105 to move to the left. When the baffle I 105 contacts the limiting plate 403, the limiting plate 403 restricts the baffle I 105 from continuing to move to the left, and thus the baffle I 105... The annular groove 103 slides to the right, so that the baffle I 105 no longer blocks the annular groove 103, thus achieving the effect of automatically opening the annular groove 103 during injection molding; when the limiting plate 403 restricts the baffle I 105 from moving to the left, the spring I 106 is compressed. After the injection molding is completed, the bottom mold 101 moves to the right, so the compressed spring I 106 is restored, which pushes the baffle I 105 to slide to the left, so that the baffle I 105 blocks the annular groove 103 again, thus achieving the effect of automatically closing the annular groove 103 after the injection molding is completed. Thus, the effect of automatically opening and closing the annular groove 103 is achieved through the above process.

[0045] like Figure 1-11 As shown, this example can achieve the effect of automatically switching the extrusion port 402.

[0046] Because a baffle II 302 is slidably connected inside the extrusion chamber 401 in the injection molding system, and a spring II 303 is fixedly connected between the baffle II 302 and the storage chamber 301; the baffle II 302 blocks the extrusion port 402, thereby closing the extrusion port 402; during injection molding, the bottom mold 101 and the moving mold 102 move to the left into the extrusion chamber 401. During this process, the moving mold 102 squeezes the baffle II 302, thereby pushing the baffle II 302 to the left, so that the baffle II 302 no longer blocks the extrusion port. The outlet 402 is opened automatically during injection molding. When the baffle Ⅱ 302 moves to the left, the spring Ⅱ 303 is compressed. After injection molding is completed, the moving mold 102 moves to the right, and the compressed spring Ⅱ 303 is restored, which pushes the baffle Ⅱ 302 to move to the left. The baffle Ⅱ 302 then blocks the outlet 402 again, thus achieving the effect of automatically closing the outlet 402 after injection molding. The above process achieves the effect of automatically opening and closing the outlet 402.

[0047] like Figure 1-12 As shown, this example can achieve the effect of automatically separating the bottom mold 101 and the moving mold 102 after injection molding.

[0048] Because a control tube 501 is fixedly connected to the right side of the storage bin 301 in the injection molding system, and a control shaft 502 is slidably connected inside the control tube 501, the moving mold 102 is detachably fixed to the right side of the control shaft 502, and a positioning plate 503 is fixedly connected to the left side of the control shaft 502; a right boss is integrally formed at the right end of the control tube 501. After injection molding is completed, the moving mold 102 moves to the right, thereby driving the control shaft 502 to slide to the right inside the control tube 501, and thus driving the positioning plate 503 to move to the right. When the positioning plate 503 slides to the right end of the control tube 501, the boss at the right end of the control tube 501 restricts the positioning plate 503 from continuing to move to the right, thereby restricting the control shaft 502 from continuing to move to the right, and thus restricting the moving mold 102 from continuing to move to the right. As a result, the stopped moving mold 102 separates from the bottom mold 101, which continues to move to the right, thereby achieving the effect of automatically separating the bottom mold 101 and the moving mold 102 after injection molding is completed.

[0049] like Figure 1-12 As shown, this example can achieve the effect of easily matching the extrusion port 402 with the annular groove 103.

[0050] Because a positioning switch 504 is fixedly connected to the left side of the control tube 501 in the injection molding system, and the positioning switch 504 is connected to the hydraulic rod 205; during injection molding, the moving mold 102 is pushed to the left by the bottom mold 101, which in turn drives the control shaft 502 to move to the left, and then drives the positioning plate 503 to move to the left. When the positioning plate 503 contacts the positioning switch 504, the positioning switch 504 controls the hydraulic rod 205 to close, and then the bottom mold 101 stops moving. The position of the bottom mold 101 can be controlled by the position of the positioning switch 504, which in turn controls the position of the annular groove 103. The positioning switch 504 can be adjusted to align the position of the annular groove 103 with the extrusion port 402, thereby achieving the effect of facilitating the alignment of the extrusion port 402 and the annular groove 103.

[0051] like Figure 1-12 As shown, this example can achieve the effect of pushing the moving mold 102 to the right after injection molding.

[0052] Because a spring Ⅲ 505 is fixed between the bottom of the positioning plate 503 and the storage bin 301 in the injection molding system; during the process of the bottom mold 101 pushing the moving mold 102 to the left, the moving mold 102 drives the control shaft 502 to move to the left, which in turn drives the positioning plate 503 to move to the left, and the positioning plate 503 squeezes the spring Ⅲ 505, and the spring Ⅲ 505 is compressed. Since the storage bin 301 is fixed, the spring Ⅲ 505 generates a rightward elastic force. When the injection molding is completed, the bottom mold 101 moves to the right, and the rightward elastic force of the spring Ⅲ 505 pushes the moving mold 102 to the right, thus achieving the effect of pushing the moving mold 102 to the right after injection molding.

[0053] An injection molding method using an injection molding system, the method comprising the following steps:

[0054] S1: Add injection molding material into the storage bin 301, and start the hydraulic cylinder 207 to push the injection molding material into the extrusion chamber 401;

[0055] S2: Start the hydraulic rod 205 to push the bottom mold 101 and the moving mold 102 to the left, and at the same time open the annular groove 103 and the extrusion port 402;

[0056] S3: The positioning plate 503 controls the annular groove 103 and the extrusion port 402 to be on the same plane;

[0057] S4: Push the injection molding material through the extrusion port 402 into the annular groove 103 for injection molding;

[0058] S5: During injection molding, start motor 203 to drive bottom mold 101 and moving mold 102 to rotate;

[0059] S6: After injection molding is completed, the hydraulic rod 205 retracts, simultaneously sealing the annular groove 103 and the extrusion port 402.

Claims

1. An injection molding system, comprising a bottom mold (101), characterized in that: The bottom mold (101) is slidably connected to the left side of the moving mold (102). Both the left side of the bottom mold (101) and the right side of the moving mold (102) are provided with annular grooves (103). Multiple circular grooves (104) are provided in both annular grooves (103). The mold also includes a support (201). A storage bin (301) is fixedly connected to the upper side of the support (201). An extrusion bin (401) is fixedly connected to the right side of the storage bin (301). An extrusion port (402) is provided on the right side of the extrusion bin (401).

2. The injection molding system according to claim 1, characterized in that: A hydraulic cylinder (207) is fixedly connected to the left side of the bracket (201), and a push plate (208) is fixedly connected to the right side of the hydraulic cylinder (207). The push plate (208) is slidably connected inside the storage bin (301).

3. The injection molding system according to claim 1, characterized in that: A slide rod (204) is slidably connected to the right side of the bracket (201). The left end of the slide rod (204) is fixed to the right end of the bottom mold (101). A hydraulic rod (205) is fixed to the right side of the bracket (201). The end of the hydraulic rod (205) is fixed to the right end of the slide rod (204).

4. The injection molding system according to claim 3, characterized in that: A motor (203) is fixedly connected to the right side of the bracket (201), and a gear (202) is rotatably connected to the right side of the bracket (201). The motor (203) drives the gear (202) to rotate. Multiple tooth grooves (206) are opened inside the slide rod (204), and all of the multiple tooth grooves (206) mesh with the gear (202).

5. The injection molding system according to claim 4, characterized in that: A baffle I (105) is slidably connected to the outside of the bottom mold (101), and a spring I (106) is fixed between the baffle I (105) and the bottom mold (101). A limit plate (403) is fixed to the right side of the extrusion port (402).

6. The injection molding system according to claim 5, characterized in that: The extrusion chamber (401) is slidably connected to a baffle II (302), and a spring II (303) is fixedly connected between the baffle II (302) and the storage chamber (301).

7. An injection molding system according to claim 6, characterized in that: A control tube (501) is fixedly connected to the right side of the storage bin (301), and a control shaft (502) is slidably connected inside the control tube (501). The moving mold (102) is detachably fixedly connected to the right side of the control shaft (502), and a positioning plate (503) is fixedly connected to the left side of the control shaft (502).

8. An injection molding system according to claim 7, characterized in that: A positioning switch (504) is fixedly connected to the left side of the control tube (501), and the positioning switch (504) is connected to the hydraulic rod (205).

9. An injection molding system according to claim 8, characterized in that: A spring Ⅲ (505) is fixed between the bottom of the positioning plate (503) and the storage bin (301).

10. An injection molding method using an injection molding system according to claims 1-9, characterized in that: The method includes the following steps: S1: Add injection molding material into the storage bin (301), and start the hydraulic cylinder (207) to push the injection molding material into the extrusion chamber (401); S2: Activate the hydraulic rod (205) to push the bottom mold (101) and the moving mold (102) to the left, and at the same time open the annular groove (103) and the extrusion port (402); S3: The positioning plate (503) controls the annular groove (103) and the extrusion port (402) to be on the same plane; S4: Push the injection molding material through the extrusion port (402) into the annular groove (103) for injection molding; S5: During injection molding, the motor (203) is started to drive the bottom mold (101) and the moving mold (102) to rotate; S6: After injection molding is completed, the hydraulic rod (205) retracts, and at the same time, the annular groove (103) and the extrusion port (402) are closed.

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