Replaceable injection device of injection molding machine

Abstract

The present invention relates to the technical field of injection molding machines, and in particular to a replaceable injection device of an injection molding machine, comprising a disc one, a disc two, an injection head one, an injection head two, a cylinder, a ring, a hollow rod, a heating head, a pipe one, a rotating assembly and a driving assembly; the output end of the injection molding part is fixedly connected to the disc one; the disc two is rotatably connected to the disc one; the injection head one is detachably connected to the disc two; the injection head two is first heated to a high temperature state by the heating head, and then the injection head two is replaced to the injection molding part to avoid molten plastic contacting the low-temperature injection head two and interfering with the injection molding operation. At the same time, the heating head used to preheat the injection head two is also used to push away the molten plastic remaining in the injection head one, and the heating head can also scrape off impurities remaining on the inner wall of the injection head one. The heating head can also perform a drying operation on the injection head one to make the injection head one meet the injection molding conditions again, thereby improving practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding machines, and more particularly to a replaceable injection device of an injection molding machine. Background Art

[0002] The injection molding machine nozzle is used to inject heated molten plastic into the mold. Its inner channel is relatively narrow. After long-term use, the molten plastic and other impurities will adhere to the inner wall of the injection molding machine nozzle, which will interfere with the flow of the molten plastic and thus affect the injection molding operation. Therefore, the prior art proposes an injection molding machine that can automatically replace the nozzle. After the new nozzle is replaced, the temperature of the high-temperature molten plastic will drop when flowing through the new nozzle due to the relatively low temperature of the new nozzle, which affects the injection molding process. In addition, the molten plastic is more likely to adhere to the low-temperature new nozzle, thereby accelerating the clogging of the new nozzle. Summary of the Invention

[0003] In order to overcome the disadvantage of the prior art that after replacing a new nozzle, the temperature of the high-temperature molten plastic will drop when flowing through the new nozzle, thereby interfering with the injection molding operation, the present invention provides a replaceable injection device for an injection molding machine.

[0004] The technical solution is as follows:

[0005] A replaceable injection device for an injection molding machine comprises a chassis, an injection molding part and a mold part; the injection molding part is mounted on the chassis; the mold part is mounted on the chassis; the machine further comprises a disc 1, a disc 2, an injection molding head 1, an injection molding head 2, a cylinder, a ring, a hollow rod, a heating head, a pipe 1, a rotating assembly and a driving assembly; the output end of the injection molding part is fixedly connected to the disc 1; the disc 1 is rotatably connected to the disc 2; the injection molding head 1 is detachably connected to the disc 2, and the injection molding head 1 is connected to the output of the injection molding part; the injection molding head 2 is detachably connected to the disc 2; the cylinder is fixedly connected to the disc 1, and the cylinder is connected to the injection molding head 2; the cylinder is rotatably connected to the ring, A hollow rod is slidably connected to the ring; a heating head is fixedly connected to the hollow rod; a plurality of convex strips are provided on the heating head, which are in contact with the second injection head; a flange is provided on the heating head, which is in contact with the first disc; a channel is provided on the heating head, which is connected to the hollow rod; an interlayer is formed between the second injection head and the heating head, and the channel is connected to the interlayer; a pipe one is rotatably connected to the hollow rod; the pipe one is connected to the hollow rod; a rotating assembly is connected to the first disc, which is used to drive the second disc to rotate; a driving assembly is connected to the injection part, which is used to drive the hollow rod to move horizontally and rotate.

[0006] Furthermore, the ribs and flanges are wear-resistant.

[0007] Furthermore, the rotating assembly includes a motor 1, a gear 1 and a gear ring; the motor 1 is fixedly connected to the injection molding part; the output end of the motor 1 is fixedly connected to the gear 1; the disc 2 is fixedly connected to the gear ring, and the gear ring is engaged with the gear 1.

[0008] Furthermore, the drive assembly includes an electric push rod, a connecting block, motor 2, gear 2 and gear 3; the electric push rod is installed on the injection molding part; the telescopic end of the electric push rod is fixedly connected to the connecting block, and the connecting block is rotatably connected to the hollow rod; motor 2 is fixedly connected to the connecting block; the output shaft of motor 2 is fixedly connected to gear 2; gear 3 is fixedly connected to the hollow rod, and gear 3 is meshed with gear 2.

[0009] Furthermore, a plurality of grooves are provided on the heating head.

[0010] Furthermore, it also includes arc strips; a plurality of arc strips are fixedly connected to the heating head, and the arc strips are in contact with the two inner walls of the injection head.

[0011] Furthermore, it also includes a second pipe; a second groove is opened on the cylinder; a second pipe is passed through the cylinder, and the second pipe is connected to the second groove.

[0012] Furthermore, an electromagnetic valve is provided inside the second pipe.

[0013] Furthermore, the surface of the chassis is coated with an anti-corrosion layer.

[0014] Furthermore, a heat-insulating layer is provided on the outside of the injection molding part.

[0015] The beneficial effects are:

[0016] 1. First, heat the injection head 2 to a high temperature through the heating head, and then replace the injection head 2 to the injection part to prevent the molten plastic from contacting the low-temperature injection head 2 and interfering with the injection molding operation. At the same time, the heating head used to preheat the injection head 2 is also used to push out the molten plastic remaining in the injection head 1. The heating head can also scrape off impurities remaining on the inner wall of the injection head 1. The heating head can also dry the injection head 1 to make the injection head 1 meet the injection molding conditions again, thereby improving practicality. In addition, the heating head can also be used to seal the port of the injection head 2 in the standby state to prevent dust in the external environment from floating into the inside of the injection head 2, thereby avoiding affecting the injection molding operation;

[0017] Second, when the heating head scrapes and cleans the injection head, the cleaning liquid is always absorbed by the inner side of the groove and will not be lost. Therefore, only a small amount of cleaning liquid is needed to fully scrape and clean the inner side of the injection head, which is beneficial to saving cleaning liquid. At the same time, the cleaning liquid in the right part of the groove is pushed to the left by the arc bar, so that more cleaning liquid contacts the left part of the inner side of the injection head, avoiding the problem of poor cleaning effect on the left part of the injection head.

[0018] 3. By opening a groove 2 on the cylinder, the cleaning liquid that has penetrated into the contact surface between the convex strip and the injection head 1, as well as the contact surface between the arc strip and the injection head 1, can be flushed away to avoid residue. After the flushing is completed, the clean water remaining in the groove 2 is discharged from the pipe 2 into the external drain pipe, and then the heating head is used for drying operation, which is beneficial to improve the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a replaceable injection device of an injection molding machine according to the present invention is shown;

[0020] Figure 2 A schematic diagram showing the installation position of the electric push rod of the present invention is shown;

[0021] Figure 3 Shows a schematic structural diagram of the rotating assembly of the present invention;

[0022] Figure 4 Shows a schematic structural diagram of the drive assembly of the present invention;

[0023] Figure 5 Shows a schematic structural diagram of the arc strip of the present invention;

[0024] Figure 6 A first operating state diagram of the heating head of the present invention is shown;

[0025] Figure 7 FIG. 1 shows a second operating state diagram of the heating head of the present invention.

[0026] In the accompanying drawings: 1-chassis, 2-injection molding part, 3-mold part, 4-disc one, 5-disc two, 6-injection molding head one, 7-injection molding head two, 8-cylinder, 9-ring, 10-hollow rod, 11-heating head, 12-pipeline one, 201-motor one, 202-gear one, 203-gear ring, 204-electric push rod, 205-connecting block, 206-motor two, 207-gear two, 208-gear three, 209-pipeline two, 2010-arc bar, 91-convex strip part, 92-flange part, 93-channel, 94-groove one, 95-groove two. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] A replaceable injection device for an injection molding machine, such as Figure 1-Figure 7As shown, it includes a chassis 1, an injection molding part 2 and a mold part 3; the injection molding part 2 is installed on the chassis 1; the mold part 3 is installed on the chassis 1; it also includes a disc 1 4, a disc 2 5, an injection molding head 1 6, an injection molding head 2 7, a cylinder 8, a ring 9, a hollow rod 10, a heating head 11, a pipe 12, a rotating assembly and a driving assembly; the output end of the injection molding part 2 is bolted to a disc 1 4, and the disc 1 4 is set to be made of alloy material; the disc 1 4 is rotatably connected to the disc 2 5; the injection molding head 1 6 is screwed onto the disc 2 5, and the injection molding head 1 6 is connected to the output of the injection molding part 2; the injection molding head 2 7 is screwed onto the disc 2 5; the disc 1 4 is bolted to the cylinder 8, and the cylinder 8 is connected to the injection molding head 2 7; A ring 9 is rotatably connected to the cylinder 8, and a hollow rod 10 is slidably connected to the ring 9; a heating head 11 is fixed to the hollow rod 10; four convex strips 91 are provided on the heating head 11, and the convex strips 91 are in contact with the injection head 2 7; a flange 92 is provided on the heating head 11, and the flange 92 is in contact with the disk 1 4; a channel 93 is provided on the heating head 11, and the channel 93 is connected to the hollow rod 10; an interlayer is formed between the injection head 2 7 and the heating head 11, and the channel 93 is connected to the interlayer; a pipe 12 is rotatably connected to the hollow rod 10; the pipe 12 is connected to the hollow rod 10; a rotating component is connected to the disk 1 4; and a driving component is connected to the injection part 2.

[0030] The ridge portion 91 and the flange portion 92 are wear-resistant to extend their service life.

[0031] The rotating assembly includes a motor 201, a gear 202 and a gear ring 203; the motor 201 is bolted to the injection molding part 2; the output end of the motor 201 is fixedly connected to the gear 1 202, and the gear 1 202 is set to an alloy material; the gear ring 203 is fixedly connected to the disk 2 5, and the gear ring 203 is engaged with the gear 1 202. The motor 201 drives the gear 1 202 to rotate, the gear 1 202 drives the gear ring 203 to rotate, and the gear ring 203 drives the disk 2 5 to rotate.

[0032] The driving assembly includes an electric push rod 204, a connecting block 205, a motor 206, a gear 207 and a gear 3 208; the electric push rod 204 is installed on the injection molding part 2; the telescopic end of the electric push rod 204 is fixedly connected to the connecting block 205, the connecting block 205 is rotatably connected to the hollow rod 10, and the connecting block 205 is set to an alloy material; the connecting block 205 is bolted to the motor 2 206; the output shaft of the motor 206 is fixedly connected to the gear 2 207; the hollow rod 10 is fixedly connected to the gear 3 208, the gear 3 208 is engaged with the gear 2 207, the motor 206 drives the gear 2 207 to rotate, the gear 2 207 drives the gear 3 208 to rotate, and the gear 3 208 drives the hollow rod 10 to rotate.

[0033] The working principle of the above embodiment is as follows:

[0034] During injection molding, the injection molding part 2 conveys the molten plastic to the injection head 6, and then injects the molten plastic into the mold of the mold part 3 through the injection head 6 to complete the injection molding operation.

[0035] When it is necessary to replace the injection head 16, the heating head 11 starts to heat up by itself, and the injection head 2 7 is preheated by the heating head 11 until the temperature of the injection head 2 7 is higher than the temperature of the molten plastic in the injection molding part 2. Then, the injection molding part 2 stops feeding the molten plastic, controls the mold part 3 to move away from the injection head 16, and the electric push rod 204 drives the connecting block 205 and the parts thereon to move to the right, so that the heating head 11 is completely separated from the injection head 2 7. Then, the motor 1 201 is started, and the motor 1 201 drives the gear 1 202 to rotate, and the gear 1 202 drives the gear ring 203 to rotate. The gear ring 203 drives the disc 2 5 to rotate, and the disc 2 5 drives the injection head 1 6 and the injection head 2 7 to rotate, so that the positions of the injection head 1 6 and the injection head 2 7 are swapped. At this time, the output end of the injection molding part 2 is connected with the injection head 2 7, and the injection head 2 7 is connected by controlling the mold part 3. Then, the injection molding part 2 transports the molten plastic to the injection head 2 7, and then the molten plastic is injected into the mold of the mold part 3 through the injection head 2 7 to continue the injection molding operation. At this time, the injection head 2 7 has been heated to a high temperature state by the heating head 11 to prevent the molten plastic from contacting the low-temperature injection head 2 7 and interfering with the injection molding operation.

[0036] First, connect the external delivery pipe to the pipe 12. After the positions of the injection head 16 and the injection head 27 are swapped, the injection head 16 is aligned with the heating head 11. The electric push rod 204 drives the connecting block 205 and the parts thereon to move to the left, thereby inserting the heating head 11 into the injection head 16 and squeezing out the molten plastic remaining in the injection head 16. At this time, a small amount of impurities remain on the inner wall of the injection head 16. Then, an organic solvent-type cleaning liquid with strong dissolving ability is delivered to the pipe 12 through the external delivery pipe. The cleaning liquid flows into the hollow rod 10 through the pipe 12, and then flows from the hollow rod 10 into the channel 93, and then from the channel 93. Flows into the interlayer between the injection head 6 and the heating head 11. At this time, the through hole corresponding to the injection head 6 on the disc 4 is blocked by the flange portion 92 to prevent the cleaning liquid from flowing to the inside of the cylinder 8. At the same time, the motor 206 is started, the motor 206 drives the gear 207 to rotate, the gear 207 drives the gear 3 208 to rotate, and the gear 3 208 drives the ring 9 and the hollow rod 10 to rotate, so that the impurities remaining on the inner wall of the injection head 6 are scraped off by the convex portion 91 on the hollow rod 10 and dissolved in the cleaning liquid. Then, the electric push rod 204 is used to control the heating head 11 to move a certain distance to the right. At this time, the state of the heating head 11 is as follows: Figure 6As shown, the left end of the heating head 11 stops blocking the left opening of the injection head 6, and the convex strip portion 91 of the heating head 11 stops contacting the injection head 6. The flange portion 92 of the heating head 11 still blocks the through hole on the disk 4 corresponding to the injection head 6, that is, the right opening of the injection head 6 is kept blocked. Then, the external delivery pipe delivers clean water to the pipe 12, and the clean water flows into the inside of the injection head 6 through the channel 93, and then sprays out from the left opening of the injection head 6, thereby flushing out the cleaning liquid with dissolved impurities and completing the cleaning operation. At this time, the injection head 6 can also be heated by the heating head 11 to evaporate the clean water remaining on the inside of the injection head 6. The injection head 6 is dried to prepare for the next use of the injection head 6. When in use, the heating head 11 used to preheat the injection head 2 7 is also used to push out the molten plastic remaining in the injection head 6. The heating head 11 can also scrape off impurities remaining on the inner wall of the injection head 6. The heating head 11 can also dry the injection head 6 to make the injection head 6 meet the injection molding conditions again, thereby improving practicality. In addition, the heating head 11 can also be used to seal the port of the injection head 2 7 in the standby state to prevent dust in the external environment from floating to the inside of the injection head 2 7, thereby avoiding affecting the injection molding operation.

[0037] According to the above working principle, we know that the present invention has the following effects:

[0038] First, the injection head 2 7 is heated to a high temperature state by the heating head 11, and then the injection head 2 7 is replaced on the injection part 2 to prevent the molten plastic from contacting the low-temperature injection head 2 7 and interfering with the injection molding operation. At the same time, the heating head 11 used to preheat the injection head 2 7 is also used to push out the molten plastic remaining in the injection head 1 6. The heating head 11 can also scrape off impurities remaining on the inner wall of the injection head 1 6. The heating head 11 can also dry the injection head 1 6 so that the injection head 1 6 can meet the injection molding conditions again, thereby improving practicality. In addition, the heating head 11 can also be used to seal the port of the injection head 2 7 in the standby state to prevent dust in the external environment from floating to the inside of the injection head 2 7, thereby avoiding affecting the injection molding operation.

[0039] Example 2

[0040] On the basis of Example 1, Figure 5-Figure 7 As shown, four grooves 94 are provided on the heating head 11 , and the grooves 94 are connected to the channels 93 .

[0041] It also includes an arc strip 2010; four arc strips 2010 are welded on the heating head 11, and the arc strip 2010 contacts the inner wall of the injection head 7.

[0042] The working principle of the above embodiment is as follows:

[0043] In the process of delivering the cleaning liquid to the injection head 6 through the channel 93 described in Example 1:

[0044] The left end of the heating head 11 blocks the left end of the injection head 6, and the flange 92 of the heating head 11 contacts the disc 4 to block the right end of the injection head 6. At this time, a narrow cavity is formed between the injection head 6 and the groove 94. The channel 93 transports clean water into the narrow cavity, and then the motor 206 controls the rotation of the heating head 11 to scrape and clean the injection head 6 through the convex portion 91. During this process, the cleaning liquid is always limited in the narrow space and will not be lost. Only a small amount of cleaning liquid is needed to fully scrape and clean the inside of the injection head 6, which is beneficial to saving cleaning liquid.

[0045] Since the right inner side of the injection head 6 is located lower, the cleaning liquid will gather toward the right side of the groove 94, resulting in a relatively poor cleaning effect on the left side of the injection head 6. Therefore, an arc-shaped bar 2010 is provided on the heating head 11. When the heating head 11 rotates for scraping and cleaning, the arc-shaped bar 2010 will also be driven to rotate, so that the arc-shaped bar 2010 pushes the cleaning liquid on the right side of the groove 94 to move to the left, thereby allowing more cleaning liquid to contact the left inner side of the injection head 6, thereby avoiding the problem of poor cleaning effect on the left side of the injection head 6.

[0046] According to the above working principle, we know that the present invention has the following effects:

[0047] When the heating head 11 scrapes and cleans the injection head 6, the cleaning liquid is always contained in the inner side of the groove 94 and will not be lost, so that only a small amount of cleaning liquid is needed to fully scrape and clean the inner side of the injection head 6, which is beneficial to saving cleaning liquid. At the same time, the cleaning liquid on the right side of the groove 94 is pushed to the left by the arc bar 2010, so that more cleaning liquid comes into contact with the inner left side of the injection head 6, avoiding the problem of poor cleaning effect on the left side of the injection head 6.

[0048] Example 3

[0049] On the basis of Example 2, Figure 4-Figure 7 As shown, it also includes a second pipe 209; a second groove 95 is opened on the cylinder 8; a second pipe 209 is passed through the cylinder 8, and the second pipe 209 is connected to the second groove 95, and the clean water in the second groove 95 is discharged through the second pipe 209.

[0050] An electromagnetic valve is provided inside the second pipe 209 .

[0051] The surface of the chassis 1 is coated with an anti-corrosion layer for rust prevention.

[0052] A heat-insulating layer is provided on the outside of the injection molding part 2 to reduce heat loss.

[0053] The working principle of the above embodiment is as follows:

[0054] In Example 2, the scraping process of the injection molding head 6 is described:

[0055] Part of the cleaning liquid will penetrate into the contact surface between the convex strip 91 and the injection head 6, as well as the contact surface between the arc strip 2010 and the injection head 6, making it difficult to clean. Therefore, the external drain pipe is first connected to the pipe 2 209. After the scraping is completed, the electric push rod 204 controls the heating head 11 to move to the right, so that the heating head 11 moves to the position shown in FIG. Figure 7 In the state shown, the flange portion 92 of the hollow rod 10 is in contact with the cylinder 8, separating the inner space of the cylinder 8, and at the same time, the arc strip 2010 is aligned with the groove 2 95, and the channel 93 transports clean water to the groove 2 95, and the clean water fills the groove 2 95 and is sprayed out from the left opening of the injection head 1 6, thereby flushing away the cleaning liquid remaining on the contact surface, and then the solenoid valve on the pipe 209 is opened, so that the clean water remaining in the groove 2 95 is discharged from the pipe 209 into the external drain pipe, and then the heating head 11 is used to perform the drying operation, which is beneficial to improve the drying efficiency.

[0056] According to the above working principle, we know that the present invention has the following effects:

[0057] By providing a second groove 95 on the cylinder 8, the cleaning liquid that has penetrated into the contact surface between the convex strip 91 and the injection head 6, as well as the contact surface between the arc strip 2010 and the injection head 6 can be flushed away to avoid residue. After the flushing is completed, the clean water remaining in the second groove 95 is discharged from the second pipe 209 into the external drain pipe, and then the heating head 11 is used for drying operation, which is beneficial to improve the drying efficiency.

[0058] On the basis of the above technical effects, the present invention also has the following advantages:

[0059] A heat-insulating layer is provided on the outside of the injection molding part 2 to reduce heat loss.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A replaceable injection device for an injection molding machine, comprising a housing (1); an injection molding part (2) mounted on the housing (1); and a mold part (3) mounted on the housing (1); characterized in that: The output end of the injection molding part (2) is fixedly connected to a disc 1 (4); the disc 1 (4) is rotatably connected to a disc 2 (5); the disc 2 (5) is detachably connected to an injection head 1 (6), and the injection head 1 (6) is connected to the output of the injection molding part (2); the disc 2 (5) is detachably connected to an injection head 2 (7); the disc 1 (4) is fixedly connected to a cylinder (8), and the cylinder (8) is connected to the injection head 2 (7); the cylinder (8) is rotatably connected to a ring (9), and a hollow rod (10) is slidably connected to the ring (9); a heating head (11) is fixedly connected to the hollow rod (10); the heating head (11) is fixedly connected to the hollow rod (10); The head (11) is provided with a plurality of convex strips (91), which are in contact with the second injection head (7); the heating head (11) is provided with a flange (92), which is in contact with the first disc (4); the heating head (11) is provided with a channel (93), which is in communication with the hollow rod (10); an interlayer is formed between the second injection head (7) and the heating head (11), and the channel (93) is in communication with the interlayer; the hollow rod (10) is rotatably connected with the first pipe (12); the first pipe (12) is in communication with the hollow rod (10); The first disc (4) is connected to a rotating assembly for driving the second disc (5) to rotate; the injection molding part (2) is connected to a driving assembly for driving the hollow rod (10) to move horizontally and rotate.

2. The replaceable injection device of an injection molding machine according to claim 1, characterized in that: The rib portion (91) and the flange portion (92) are wear-resistant.

3. The replaceable injection device of an injection molding machine according to claim 1, characterized in that: The rotating assembly includes a motor 1 (201); the injection molding part (2) is fixedly connected to the motor 1 (201); the output end of the motor 1 (201) is fixedly connected to the gear 1 (202); the disc 2 (5) is fixedly connected to the gear ring (203), and the gear ring (203) is meshed with the gear 1 (202).

4. The replaceable injection device of an injection molding machine according to claim 1, characterized in that: The driving assembly comprises an electric push rod (204); the electric push rod (204) is installed on the injection molding part (2); the telescopic end of the electric push rod (204) is fixedly connected to a connecting block (205), and the connecting block (205) is rotatably connected to the hollow rod (10); a second motor (206) is fixedly connected to the connecting block (205); the output shaft of the second motor (206) is fixedly connected to a second gear (207); and a third gear (208) is fixedly connected to the hollow rod (10), and the third gear (208) is meshed with the second gear (207).

5. The replaceable injection device of an injection molding machine according to claim 4, characterized in that: A plurality of grooves (94) are provided on the heating head (11).

6. The replaceable injection device of an injection molding machine according to claim 5, characterized in that: It also includes an arc-shaped strip (2010); a plurality of arc-shaped strips (2010) are fixedly connected to the heating head (11), and the arc-shaped strips (2010) are in contact with the inner wall of the second injection head (7).

7. The replaceable injection device of an injection molding machine according to claim 6, characterized in that: It also includes a second pipe (209); a second groove (95) is provided on the cylinder (8); a second pipe (209) is passed through the cylinder (8), and the second pipe (209) is communicated with the second groove (95).

8. The replaceable injection device of an injection molding machine according to claim 7, characterized in that: An electromagnetic valve is provided inside the second pipe (209).

9. The replaceable injection device of an injection molding machine according to any one of claims 1 to 8, characterized in that: The surface of the chassis (1) is coated with an anti-corrosion layer.

10. The replaceable injection device of an injection molding machine according to claim 9, characterized in that: A heat-insulating layer is provided on the outside of the injection molding part (2).

Images