Automatic unloader for injection molding machine

Abstract

The application relates to the technical field of injection molding equipment, and particularly discloses an automatic feeding machine of an injection molding machine, which comprises a feeding pipe, a heating cylinder, a control assembly, a driving assembly and an adjusting assembly. The control assembly comprises a control ring and a control plate. A through hole is formed through the control ring. The control ring is located at the communication position of the feeding pipe and the heating cylinder. The driving assembly is connected with the control ring and used for driving the control ring to rotate. The adjusting assembly cooperates with the control plate and is used for driving the control plate to move up and down in the feeding pipe. When the through hole corresponds to the feeding pipe, the feeding pipe is communicated with the heating cylinder to feed. After feeding is completed, the driving assembly drives the control ring to rotate. When the control plate rotates to the feeding pipe, the lower end of the feeding pipe is closed. Then, the adjusting assembly drives the control plate to move upward and separate from the control ring. The raw material in the feeding pipe is pushed into a hopper. The automatic feeding machine of the injection molding machine has the effect of reducing the blockage of the feeding pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding equipment, in particular to an automatic feeding machine of an injection molding machine. BACKGROUND

[0002] The injection molding machine is the core equipment in the field of plastic injection processing, and its main function is to mold thermoplastic or fixed plastic into specified plastic products through high-pressure injection. The feeding structure of the injection molding machine is the initial channel for the raw material to enter the plasticizing system, and is mainly responsible for the conveying and feeding of the raw material.

[0003] The patent document with publication number CN107283772B discloses an injection molding mechanism for an injection molding machine. It includes a barrel shell, a smelting cavity is arranged in the barrel shell, a barrel feeding port and an exhaust port are arranged at the side wall of the barrel shell, a nozzle structure is arranged at one end of the barrel shell opposite to the feeding port; a heating device is arranged outside the barrel shell, and a heat recovery pipeline is wound outside the heating device; the heat recovery pipeline and the exhaust port are connected with the high-temperature medium inlet of the heat exchanger through the first valve and the second valve respectively, and the high-temperature medium outlet of the heat exchanger is provided with a first pump body; the nozzle structure includes a nozzle body, the nozzle body includes a nozzle seat, a hollow connecting sleeve is connected to the left side of the nozzle seat, and a nozzle head is connected to the left side of the hollow connecting sleeve. During processing, the raw material is added into the barrel through the feeding port, and then the raw material is conveyed to the heating device through the feeding port of the barrel. After the raw material is heated and melted by the heating device, the melted raw material is injected into the closed mold cavity through the nozzle structure for injection molding processing.

[0004] However, the following problems still exist in this scheme. When the temperature of the heating section behind the heating device of the injection molding machine is too high, heat will be conducted to the feeding port area, causing the raw material to soften or even melt before entering the heating device. The melted plastic particles adhere to each other to form a bridge, blocking the feeding channel and hindering the entry of new material. This phenomenon is more common for low-melting-point raw materials. Although a cooling device is usually arranged at the feeding port on a general injection molding machine, when the cooling waterway is blocked or the cooling efficiency is insufficient, the heat conducted by the heating device cannot be effectively offset, and the raw material will still melt. Once the melting phenomenon occurs, the blockage of the feeding port will gradually become serious, and the injection molding machine needs to be stopped for cleaning, which seriously affects the injection molding efficiency. SUMMARY

[0005] The present application provides an automatic feeding machine of an injection molding machine, which aims to solve the problem of raw material melting in the feeding port caused by heat transfer from the heating device in related technology.

[0006] The automatic feeding machine for injection molding machines of the present invention includes a feeding pipe installed at the bottom of the hopper and a heating cylinder communicating with the lower end of the feeding pipe. It also includes a control component, a drive component, and an adjustment component. The control component includes a control ring rotatably sleeved outside the heating cylinder and a control plate slidably mounted outside the control ring. A through-hole is provided on the control ring, which is located at the connection between the feeding pipe and the heating cylinder. The drive component is connected to the control ring to drive its rotation. The adjustment component cooperates with the control plate to move the control plate up and down within the feeding pipe. When the through-hole corresponds to the feeding pipe, the feeding pipe communicates with the heating cylinder for feeding. After feeding is completed, the drive component drives the control ring to rotate. When the control plate rotates to the feeding pipe, it closes the lower end of the feeding pipe. Subsequently, the adjustment component drives the control plate upward to separate from the control ring, pushing the raw material in the feeding pipe into the hopper.

[0007] The effect is that the raw material is placed in the hopper and enters the heating cylinder through the feed pipe. During feeding, the inlet is located directly below the feed pipe, and the bottom of the feed pipe is connected to the heating cylinder. The raw material enters the heating cylinder. After feeding is completed, the drive component drives the control ring to rotate, causing the inlet to separate from the feed pipe. At the same time, the control plate rotates to the bottom of the feed pipe, closing the lower end of the feed port. Then, the adjustment component drives the control plate to move upward from the bottom of the feed pipe, pushing the raw material in the feed pipe upward into the hopper. This reduces the heat generated by the heating cylinder during heating, which is transferred to the feed pipe and causes the raw material in the feed pipe to melt. This reduces the possibility of blockage in the feed pipe and improves injection molding efficiency.

[0008] Preferably, a placement groove is provided on the outer side of the control ring, and the control plate slides in the placement groove toward the axis of the control ring.

[0009] The effect is that when the control plate moves upward, it separates from the placement groove. At the same time, since the placement groove does not penetrate the control ring, the control ring remains in a blocking state on the feed pipe when the control plate and the control ring separate, reducing the phenomenon of raw materials in the heating cylinder entering the feed pipe. This ensures that there is no raw material between the control plate and the control ring, and guarantees that there is no raw material residue in the feed pipe during heating.

[0010] Preferably, the adjustment assembly includes a power component one and a guide rod. The power component one is mounted on the hopper, and the output end of the power component one is connected to the guide rod. The guide rod is slidably mounted inside the hopper. A guide groove one is provided on the outer side of the control ring, and a guide groove two is provided on the outer side of the control plate. The end of the guide rod is slidably engaged with guide groove one and guide groove two, respectively. When the control plate is located in the placement groove, guide groove one and guide groove two are on the same arc surface. When the opening is separated from the feed pipe, the end of the guide rod slides from guide groove one into guide groove two.

[0011] The effect is that when the control plate rotates to below the feeding pipe with the control ring, the end of the guide rod moves into the guide groove two from the guide groove one, at this time the guide rod cooperates with the control plate through the guide groove two, the power member one drives the guide rod to move upward, the guide rod drives the control plate to move upward, the position of the control plate is adjusted, when feeding again, the guide rod drives the control plate to reset, at this time the guide groove one and the guide groove two are on the same arc surface, the control ring rotates, so that the end of the guide rod separates from the guide groove two and cooperates with the guide groove one.

[0012] Preferably, the control plate is provided with an extension, a sliding groove is formed on the inner wall of the feeding pipe, and the guide rod is slidingly assembled in the sliding groove; when the control plate corresponds to the feeding pipe, the extension rotates to the sliding groove.

[0013] The effect is that by providing the extension on the control plate and the guide rod in the sliding groove, the control plate can completely cover the feeding pipe when moving up and down, and the phenomenon of residual raw materials in the feeding pipe is reduced when the control plate moves above the feeding pipe.

[0014] Preferably, the outside of the heating cylinder is provided with a mounting block, a mounting groove is formed in the mounting block, and the control ring is rotationally arranged in the mounting groove; the driving assembly comprises a driving member one, a gear and a gear ring; the gear ring is coaxially arranged on the side surface of the control ring; the driving member one is arranged on the mounting block; and the gear is arranged on the output end of the driving member one and meshes with the gear ring.

[0015] The effect is that the driving member one drives the gear to rotate, the gear drives the gear ring to rotate, and the gear ring drives the control ring to rotate, so as to adjust the positions of the through hole and the control plate.

[0016] Preferably, the mounting block is provided with an auxiliary assembly, the auxiliary assembly comprises a power member two and an auxiliary plate; the power member two is arranged on the mounting block; the output end of the power member two is connected with the auxiliary plate to drive the auxiliary plate to slide in the direction towards the axis of the control ring; the side surface of the heating cylinder is provided with an auxiliary port; the auxiliary port corresponds to the auxiliary plate; when the control plate rotates to the feeding pipe, the through hole rotates to between the auxiliary plate and the auxiliary port.

[0017] The effect is that when the through hole separates from the feeding pipe, the through hole rotates to correspond to the auxiliary plate, and at this time the through hole is between the auxiliary plate and the auxiliary port; the power member two drives the auxiliary plate to move in the direction towards the axis of the control ring; and the auxiliary plate pushes the residual raw materials in the through hole into the heating cylinder through the auxiliary port. In addition, when the through hole corresponds to the feeding pipe, the side surface of the control ring corresponds to the auxiliary port, so that the auxiliary port is in a closed state, avoiding the phenomenon that the raw materials in the heating cylinder flow out from the auxiliary port.

[0018] Preferably, an arc surface is arranged on the side of the auxiliary plate close to the control ring, and the arc surface slidingly abuts against the outside of the control ring.

[0019] The effect is that the side surface of the auxiliary plate is an arc surface, the inner side of the auxiliary plate abuts against the outer side of the control ring during rotation of the control ring, the auxiliary plate and the outer side of the control ring maintain the abutting state during the process, the phenomenon of raw materials entering between the auxiliary plate and the control ring is reduced, and the stability of overall operation is ensured.

[0020] Preferably, the hopper is provided with a pushing assembly, the pushing assembly comprising: a driving member two, a stirring rod, and a pushing sheet, the output end of the driving member two being connected with the stirring rod, the pushing sheet being arranged in a spiral shape along the vertical direction outside the stirring rod, and the pushing sheet being located in the feeding pipe.

[0021] The effect is that the driving member two drives the pushing sheet to rotate through the stirring rod, the pushing sheet pushes the raw materials in the feeding pipe into the heating cylinder, and the feeding is assisted.

[0022] Preferably, the stirring rod is parallel to the guide rod, the stirring rod comprises an outer rod and an inner rod, the outer rod is slidably sleeved outside the inner rod in a vertical direction, the outer rod is connected with the pushing sheet, the inner rod is connected with the driving member two, the guide rod is provided with a connecting rod, the end of the connecting rod is provided with a connecting ring, the connecting ring is rotatably sleeved outside the outer rod, and the guide rod moves to drive the pushing sheet to move synchronously through the outer rod.

[0023] The effect is that when the guide rod drives the control plate to move upwards, the outer rod is driven to move through the connecting rod and the connecting ring, the outer rod drives the pushing sheet to move, the pushing sheet moves synchronously with the control plate, the pushing sheet is located above the control plate, when the control plate moves to the upper end of the feeding pipe, the pushing sheet moves into the hopper, and the phenomenon of mutual interference of the pushing sheet and the control plate is reduced. Meanwhile, the connecting ring and the outer ring are rotatably connected, the outer rod can rotate relative to the connecting ring, the pushing sheet can rotate alone, and the raw materials in the feeding pipe are transported.

[0024] Preferably, the control plate is arranged in an arc shape around the axis of the control ring, and when the control plate is located in the placing groove, the outer side of the control plate is located on the same circular arc surface as the outer side of the control ring.

[0025] The effect is that when the control plate rotates to be separated from the feeding pipe, the outer side of the control plate abuts against the inner wall of the mounting groove, so as to reduce the phenomenon of separation of the control plate and the placing groove.

[0026] Beneficial effects:

[0027] The control ring and the control plate are arranged, the control ring is rotated to control the closing of the lower end of the feeding pipe, normal feeding can be performed when the feeding pipe is opened, the feeding pipe is blocked when the feeding pipe is closed, the control plate is moved, the raw materials in the feeding pipe are pushed into the hopper, the feeding pipe is in an idle state when the raw materials are heated in the heating cylinder, the phenomenon that the raw materials in the feeding pipe are melted due to heat transfer from the heating cylinder to the feeding pipe during heating is reduced, the phenomenon of blockage of the feeding pipe is reduced, and the injection molding efficiency is improved. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the injection molding equipment in an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the hopper and heating cylinder in an embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram showing the connection relationship between the feed pipe and the heating cylinder in an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram illustrating the cooperation relationship between the control ring and the clearance groove in an embodiment of the present invention.

[0032] Figure 5 This is a partial exploded view of the control ring and guide rod in an embodiment of the present invention.

[0033] Figure 6 This is a partially exploded view of the control ring and control board in an embodiment of the present invention.

[0034] Figure 7 This is a cross-sectional view of the control loop in an embodiment of the present invention.

[0035] Figure 8 This is a cross-sectional view of the control board in an embodiment of the present invention.

[0036] Figure 9 This is a schematic diagram of the structure of the adjustment component and the feeding component in an embodiment of the present invention.

[0037] Figure label:

[0038] 1. Frame; 11. Injection mold; 12. Drive motor; 2. Hopper; 21. Feed pipe; 211. Clearance groove; 212. Slide groove; 3. Heating cylinder; 31. Auxiliary port; 32. Spiral blade; 33. Heating module; 4. Control assembly; 41. Control ring; 411. Through port; 412. Placement groove; 413. Guide groove one; 42. Control board; 421. Guide groove two; 422. Extension; 5. Drive assembly; 51. Drive component one; 52. Gear; 53. Gear ring; 6. Adjustment assembly; 61. Power component one; 62. Guide rod; 621. Locking part; 622. Connecting rod; 623. Connecting ring; 7. Mounting block; 71. Mounting groove; 8. Auxiliary assembly; 81. Power component two; 82. Auxiliary plate; 9. Pushing assembly; 91. Drive component two; 92. Stirring rod; 921. Outer rod; 922. Inner rod; 93. Pushing plate. Detailed Implementation

[0039] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the embodiments given herein are by way of illustration only and therefore should not be considered limiting the scope of the application.

[0040] As Figures 1 to 9 shown, the automatic feeding machine of the injection molding machine of the present application is installed on the rack 1, and an injection mold 11 for injection molding is arranged on the rack 1. The discharge end of the feeding machine cooperates with the injection mold 11 for feeding the injection mold 11. The feeding machine includes a hopper 2 and a heating cylinder 3 installed on the rack 1. The hopper 2 is located above the heating cylinder 3, and the heating cylinder 3 is horizontally placed. A feeding pipe 21 is arranged at the bottom of the hopper 2, and the feeding pipe 21 communicates with the heating cylinder 3. The raw material in the hopper 2 enters the heating cylinder 3 through the feeding pipe 21, and after being heated and melted in the heating cylinder 3, it is fed into the injection mold 11 for injection molding.

[0041] Referring to Figure 2 , Figure 3 , Figure 4 , Figure 5 , the control assembly 4, the driving assembly 5 and the adjusting assembly 6 are arranged on the rack 1. The driving assembly 5 cooperates with the control assembly 4 to control the closing of the feeding pipe 21, and the adjusting assembly 6 cooperates with the control assembly 4 to push the raw material remaining in the feeding pipe 21 into the hopper 2 after the feeding pipe 21 is closed. After the feeding is completed, the raw material is left in the feeding pipe 21, and the heat generated by the heating of the raw material by the heating cylinder 3 is transferred to the feeding pipe 21, which can prevent the raw material in the feeding pipe 21 from melting, thereby reducing the phenomenon of blockage of the feeding pipe 21 and improving the stability of the feeding.

[0042] Referring to Figure 2 , Figure 3 , the feeding pipe 21 is located above the heating cylinder 3, and the feeding pipe 21 is vertically arranged. The mounting block 7 is arranged outside the heating cylinder 3, and the mounting block 7 is arranged at the connection between the feeding pipe 21 and the heating cylinder 3. The mounting groove 71 is formed in the mounting block 7, and the control assembly 4 is arranged in the mounting groove 71.

[0043] Referring to Figure 3 , Figure 4 , Figure 5The control assembly 4 comprises a control ring 41 and a control plate 42. The control ring 41 is sleeved outside the heating cylinder 3 and is rotatably arranged outside the heating cylinder 3, i.e. the control ring 41 is rotatably arranged in the installation groove 71. A clearance groove 211 is formed at the lower end of the feeding pipe 21, and the control ring 41 is installed directly below the feeding pipe 21 through the clearance groove 211. The control plate 42 is slidably arranged on the control ring 41. A through opening 411 is formed on the control ring 41 and extends through the control ring 41. The outer diameter of the control plate 42 is the same as the inner wall of the feeding pipe 21, i.e. when the control plate 42 is slid upward in the feeding pipe 21, the raw materials in the feeding pipe 21 can be pushed into the hopper 2.

[0044] The driving assembly 5 is connected with the control ring 41 to drive the control ring 41 to rotate. The adjusting assembly 6 is connected with the control plate 42 to adjust the position of the control plate 42.

[0045] When feeding, the through opening 411 is located directly below the bottom of the feeding pipe 21, i.e. the feeding pipe 21 is in communication with the inside of the heating cylinder 3 through the through opening 411, and the raw materials in the hopper 2 enter the heating cylinder 3 through the feeding pipe 21 and the through opening 411. After the feeding is completed, the driving assembly 5 drives the control ring 41 to rotate, the control plate 42 rotates with the control ring 41, the control ring 41 drives the through opening 411 to move away from the feeding pipe 21, and the control plate 42 moves close to the feeding pipe 21 at the same time, until the control plate 42 rotates to the lower side of the feeding pipe 21, i.e. the feeding pipe 21 is in a closed state, and the feeding into the heating cylinder 3 is stopped. Then, the adjusting assembly 6 drives the control plate 42 to move upward from the bottom of the feeding pipe 21, so that the control plate 42 is separated from the control ring 41, and the raw materials in the feeding pipe 21 are pushed into the hopper 2, so as to clean the raw materials in the feeding pipe 21 after the feeding is completed.

[0046] When the control plate 42 moves to the upper end of the feeding pipe 21, the movement is stopped. When feeding is needed again, the adjusting assembly 6 drives the control plate 42 to move downward, so that the control plate 42 cooperates with the control ring 41 again. Then, the driving assembly 5 drives the control ring 41 to rotate, so that the control plate 42 is separated from the feeding pipe 21, until the through opening 411 rotates to the lower side of the feeding pipe 21, so as to feed again.

[0047] With reference to Figure 5 , Figure 6 , Figure 7 A placement groove 412 is formed on the outer side of the control ring 41 and does not extend through the control ring 41. The control plate 42 is arranged in the placement groove 412 and slides in the placement groove 412 towards the axis direction of the control ring 41. Meanwhile, the control plate 42 can be separated from the placement groove 412.

[0048] When the control plate 42 rotates to the position of the feeding pipe 21, the control ring 41 blocks the communication between the feeding pipe 21 and the heating cylinder 3, and when the control plate 42 moves upward, the phenomenon that the raw material in the heating cylinder 3 enters the feeding pipe 21 is reduced. When the control plate 42 moves upward, the raw material between the control plate 42 and the control ring 41 is avoided, the phenomenon that the raw material in the feeding pipe 21 melts is reduced, and the control plate 42 is conveniently placed in the placing groove 412 again when the control plate 42 moves downward.

[0049] With reference to Figure 6 , Figure 7 , Figure 8 The inner side of the control ring 41 is in rotational abutment with the heating cylinder 3, and the outer side is in rotational abutment with the bottom of the feeding pipe 21, so as to ensure the sealing between the control ring 41 and the heating cylinder 3 and the feeding pipe 21, and reduce the phenomenon of raw material leakage.

[0050] The control plate 42 is arranged in an arc shape around the axis of the control ring 41, so that when the control plate 42 is located in the placing groove 412, the outer side of the control plate 42 is located on the same circular arc surface as the outer side of the control ring 41, so that the control ring 41 can drive the control plate 42 to rotate synchronously when rotating, and the phenomenon that the control plate 42 interferes with the rotation of the control ring 41 is reduced.

[0051] With reference to Figure 5 The driving assembly 5 comprises a driving member one 51, a gear 52 and a gear ring 53. The driving member one 51 is arranged as a motor, the gear 52 is arranged at the output end of the driving member one 51, and the gear ring 53 is arranged on the side surface of the control ring 41. The gear ring 53 is coaxially arranged with the control ring 41, and the gear 52 is engaged with the gear ring 53. The driving member one 51 drives the gear ring 53 to rotate through the gear 52, and then drives the control ring 41 to rotate, so as to adjust the positions of the through hole 411 and the control plate 42. The gear ring 53 is in a semicircular ring shape, and the gear ring 53 is arranged away from the feeding pipe 21, that is, the gear ring 53 does not contact the feeding pipe 21 when the control ring 41 rotates, so as to ensure the sealing of the cooperation between the control ring 41 and the feeding pipe 21.

[0052] With reference to Figure 3 , Figure 5 , Figure 6 , Figure 9The adjusting assembly 6 includes a power component 61 and a guide rod 62. The power component 61 is a cylinder, mounted on the hopper 2, and arranged vertically. The guide rod 62 is connected to the output end of the power component 61, i.e., connected to the piston rod of the cylinder. The guide rod 62 is arranged vertically and extends through the hopper 2 into the feed pipe 21, where it connects to the control plate 42. A guide groove 413 is provided on the outer side of the control ring 41, and a guide groove 421 is provided on the outer side of the control plate 42. Both guide grooves 413 and 421 are arc-shaped around the axis of the control ring 41. Guide groove 413 is located between the placement groove 412 and the opening 411. When the control plate 42 is located in the placement groove 412, guide grooves 413 and 421 are located on the same arc surface. The guide rod 62 has a locking part 621 at one end away from the power component 61. The locking part 621 is slidably disposed in the guide groove 413 and the guide groove.

[0053] When the inlet 411 is located below the feed pipe 21, the guide rod 62 engages with the first guide groove 413 via the locking part 621. When the control ring 41 rotates, it drives the control plate 42 closer to the feed pipe 21. The locking part 621 slides away from the first guide groove 413 and simultaneously engages with the second guide groove 421. At this time, the guide rod 62 engages with the control plate 42 via the locking part 621. When the control plate 42 rotates to directly below the feed pipe 21, the locking part 621 moves to the end of the second guide groove 421 opposite to the first guide groove 413. Subsequently, the power component 61 drives the guide rod 62 to move upward, and the guide rod 62 drives the control plate 42 to move upward via the locking part 621, thereby adjusting the position of the control plate 42.

[0054] Reference Figure 2 , Figure 3 When the outer side of the control ring 41 slides against the inner wall of the mounting groove 71, and the control plate 42 separates from the feed pipe 21, the control ring 41 drives the control plate 42 to rotate into the mounting groove 71. At this time, the outer side of the control plate 42 slides against the inner wall of the mounting groove 71, and the inner wall of the mounting groove 71 restricts the control plate 42, reducing the phenomenon of the control plate 42 separating from the placement groove 412, and so that when the control ring 41 rotates later, the locking part 621 can be engaged with the guide groove 421 again.

[0055] Reference Figure 5 , Figure 6 The control plate 42 is provided with an extension 422, which is located on the side of the control plate 42 opposite to the guide groove 413. A sliding groove 212 is formed on the inner wall of the feed pipe 21, which is arranged vertically. The guide rod 62 is slidably assembled in the sliding groove 212. When the control plate 42 is rotated to be directly below the feed pipe 21, the extension 422 corresponds to the sliding groove 212.

[0056] The guide rod 62 drives the control plate 42 to move through the extension 422, and the extension 422 slides in the sliding groove 212 during the movement of the control plate 42. Meanwhile, the guide rod 62 is arranged in the sliding groove 212, so that the control plate 42 can completely cover the feeding pipe 21 during the movement, and the raw materials in the feeding pipe 21 are pushed into the hopper 2.

[0057] With reference to Figure 3 , Figure 5 The auxiliary assembly 8 is arranged in the mounting block 7, and the auxiliary assembly 8 comprises a power member two 81 and an auxiliary plate 82. The power member two 81 is arranged as a pneumatic cylinder and faces the axis direction of the control ring 41. The auxiliary plate 82 is arranged at the output end of the power member, and the size of the auxiliary plate 82 corresponds to the through hole 411. An auxiliary opening 31 is arranged on the side of the heating cylinder 3, and the auxiliary opening 31 corresponds to the auxiliary plate 82.

[0058] When the through hole 411 is located at the feeding pipe 21, the control ring 41 blocks the auxiliary opening 31. When the through hole 411 is separated from the feeding pipe 21, a part of the raw materials will be left in the through hole 411. When the control plate 42 rotates to the feeding pipe 21, the through hole 411 rotates to the auxiliary opening 31. Then, the power member two 81 drives the auxiliary plate 82 to move, and the auxiliary plate 82 pushes the raw materials left in the through hole 411 into the heating cylinder 3 through the auxiliary opening 31, so as to reduce the melting phenomenon of the raw materials left in the through hole 411, and further reduce the blocking phenomenon during the subsequent feeding.

[0059] With reference to Figure 3 , Figure 5 The side of the auxiliary plate 82 close to the control ring 41 is provided with an arc surface, and the arc surface is in sliding abutment with the outer side of the control ring 41. When the control ring 41 rotates, the auxiliary plate 82 abuts against the side of the control ring 41, so as to reduce the phenomenon that the raw materials enter between the auxiliary plate 82 and the control ring 41.

[0060] With reference to Figure 2 , Figure 3 , Figure 5 In order to facilitate the raw materials to enter the heating cylinder 3, the pushing assembly 9 is arranged in the hopper 2, and the pushing assembly 9 comprises a driving member two 91, a stirring rod 92 and a pushing sheet 93. The driving member two 91 is arranged on the hopper 2 and is arranged as a motor. The stirring rod 92 is arranged at the output end of the driving member two 91 and is coaxially arranged with the center of the feeding pipe 21. The pushing sheet 93 is arranged in a spiral shape along the vertical direction outside the stirring rod 92, and the outer side of the pushing sheet 93 is close to the inner wall of the feeding pipe 21.

[0061] The driving member two 91 drives the stirring rod 92 to rotate, and the stirring rod 92 drives the pushing sheet 93 to rotate, so as to push the raw materials into the heating cylinder 3 for subsequent processing.

[0062] Referring to Figure 9 , the stirring rod 92 is parallel to the guide rod 62, the stirring rod 92 comprises an outer rod 921 and an inner rod 922, the outer rod 921 is slidingly assembled outside the inner rod 922, that is, the outer rod 921 and the inner rod 922 can rotate synchronously. The inner rod 922 is connected with the output end of the driving member two 91, and the pushing piece 93 is connected with the outer rod 921. A connecting rod 622 is arranged on the guide rod 62, the connecting rod 622 is horizontally arranged, a connecting ring 623 is arranged at the end of the connecting rod 622 away from the guide rod 62, and the connecting ring 623 is rotatably sleeved outside the outer rod 921.

[0063] The driving member two 91 drives the pushing piece 93 to rotate through the inner rod 922 and the outer rod 921, and the outer rod 921 rotates in the connecting ring 623. When the guide rod 62 moves upwards to drive the control plate 42 to move in the feeding pipe 21, the outer rod 921 is driven to move synchronously through the connecting rod 622 and the connecting ring 623, and the pushing piece 93 is driven to move upwards synchronously. In turn, the pushing piece 93 and the control plate 42 move upwards synchronously, and after the control plate 42 pushes the raw materials in the feeding pipe 21 into the hopper 2, the pushing piece 93 is also located in the hopper 2, reducing the phenomenon that the pushing piece 93 and the control plate 42 interfere with each other.

[0064] Referring to Figure 1 , Figure 2 , a spiral piece 32 is arranged in the heating cylinder 3, a driving motor 12 is arranged on the rack 1, the output end of the driving motor 12 is connected with the spiral pushing piece, and a plurality of heating modules 33 are arranged on the side of the heating cylinder 3. The raw materials in the hopper 2 enter the heating cylinder 3, the driving motor 12 drives the spiral piece 32 to drive the raw materials to move to the heating module 33 for heating, and after the raw materials are heated and melted, the raw materials are continuously pushed to be injected into the injection mold 11 for forming processing.

[0065] The implementation principle of the present application is that when feeding, the through hole 411 is located directly below the feeding pipe 21, at this time the feeding pipe 21 is in communication with the inside of the heating cylinder 3, raw materials are added into the hopper 2, the driving member two 91 drives the inner rod 922 and the outer rod 921 to rotate to drive the pushing piece 93 to rotate to convey the raw materials into the heating cylinder 3.

[0066] After the feeding is completed, the driving member one 51 drives the control ring 41 to rotate through the gear 52 and the gear ring 53, the control ring 41 drives the through hole 411 to separate from the feeding pipe 21, after the through hole 411 completely separates from the feeding pipe 21, the side surface of the control ring 41 corresponds to the bottom of the feeding pipe 21 to block the bottom of the feeding pipe 21, and at the same time the control plate 42 rotates into the feeding pipe 21, the end of the guide rod 62 slides into the guide groove two 421 through the guide groove one 413, at this time the guide rod 62 cooperates with the control plate 42.

[0067] The power member 61 drives the guide rod 62 to move upward, the movement of the guide rod 62 drives the control plate 42 to move upward, the movement of the control plate 42 pushes the raw materials in the feeding pipe 21 into the hopper 2, when the control plate 42 moves upward, the control plate 42 is separated from the control ring 41, the control ring 41 keeps blocking the bottom of the feeding pipe 21, so that there is no raw materials between the control plate 42 and the control ring 41 after the control plate 42 is separated, which reduces the phenomenon that the raw materials in the heating cylinder 3 enter the feeding pipe 21, and facilitates the downward movement of the control plate 42 to reset.

[0068] The movement of the control plate 42 pushes the raw materials in the feeding pipe 21 into the hopper 2, so that there is no residual raw materials in the feeding pipe 21 when the heating cylinder 3 heats the raw materials, which reduces the phenomenon that the raw materials in the feeding pipe 21 melt due to the heat transfer of the heating cylinder 3 to the feeding pipe 21, improves the stability of the feeding, and improves the injection efficiency.

[0069] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An automatic feeding machine for an injection molding machine, comprising a feeding pipe installed at the bottom of the hopper and a heating cylinder communicating with the lower end of the feeding pipe, characterized in that, It also includes a control component, a drive component, and an adjustment component; the control component includes: a control ring rotatably sleeved outside the heating cylinder, and a control plate slidably mounted outside the control ring, with a through opening on the control ring, and the control ring is located at the connection between the feed pipe and the heating cylinder; the drive component is connected to the control ring to drive the control ring to rotate, and the adjustment component cooperates with the control plate to drive the control plate to move up and down inside the feed pipe; When the port corresponds to the feed pipe, the feed pipe is connected to the heating cylinder for feeding. After feeding is completed, the drive component drives the control ring to rotate. When the control plate rotates to the feed pipe, the lower end of the feed pipe is closed. Then the adjustment component drives the control plate to move upward and separate from the control ring, pushing the raw material in the feed pipe into the hopper. A placement groove is provided on the outer side of the control ring, and the control plate slides in the placement groove toward the axis of the control ring; The adjustment assembly includes a power component 1 and a guide rod. The power component 1 is mounted on the hopper, and its output end is connected to the guide rod. The guide rod is slidably mounted inside the hopper. A guide groove 1 is provided on the outer side of the control ring, and a guide groove 2 is provided on the outer side of the control plate. The ends of the guide rod are slidably engaged with guide groove 1 and guide groove 2 respectively. When the control plate is located in the placement groove, guide groove 1 and guide groove 2 are on the same arc surface. When the opening is separated from the feed pipe, the ends of the guide rod slide from guide groove 1 to guide groove 2. The control panel is equipped with an extension, and a groove is provided on the inner wall of the feed pipe. The guide rod is slidably assembled in the groove. When the control panel is aligned with the feed pipe, the extension rotates to the groove.

2. The automatic feeding machine for injection molding machines according to claim 1, characterized in that, The heating cylinder is provided with an external mounting block, and an mounting groove is provided inside the mounting block. The control ring is rotatably set in the mounting groove. The drive assembly includes a drive component, a gear and a gear ring. The gear ring is coaxially set on the side of the control ring. The drive component is set on the mounting block, and the gear is set at the output end of the drive component and meshes with the gear ring.

3. The automatic feeding machine for injection molding machines according to claim 2, characterized in that, The mounting block is equipped with auxiliary components, including: power component two and auxiliary plate. Power component two is mounted on the mounting block. The output end of power component two is connected to the auxiliary plate to drive the auxiliary plate to slide in the direction toward the axis of the control ring. An auxiliary port is opened on the side of the heating cylinder, and the auxiliary port corresponds to the auxiliary plate. When the control plate rotates to the feed pipe, the port rotates between the auxiliary plate and the auxiliary port.

4. The automatic feeding machine for injection molding machines according to claim 3, characterized in that, The auxiliary plate has an arc-shaped surface on the side near the control ring, which slides against the outer side of the control ring.

5. The automatic feeding machine for injection molding machines according to claim 1, characterized in that, The hopper is equipped with a pushing assembly, which includes: a second driving component, a stirring rod, and a pushing plate. The output end of the second driving component is connected to the stirring rod. The pushing plate is arranged in a spiral shape along the vertical direction outside the stirring rod and is located inside the feed pipe.

6. The automatic feeding machine for injection molding machines according to claim 5, characterized in that, The stirring rod is parallel to the guide rod. The stirring rod includes an outer rod and an inner rod. The outer rod slides up and down and is sleeved on the outside of the inner rod. The outer rod is connected to the pusher plate. The inner rod is connected to the drive component. A connecting rod is provided on the guide rod. A connecting ring is provided at the end of the connecting rod. The connecting ring rotates and is sleeved on the outside of the outer rod. When the guide rod moves, it drives the pusher plate to move synchronously through the outer rod.

7. The automatic feeding machine for injection molding machines according to claim 1, characterized in that, The control board is set to be arc-shaped around the axis of the control ring. When the control board is located in the placement slot, the outer side of the control board and the outer side of the control ring are on the same arc surface.

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