A rocket head welding device and method for injection molding machines

Abstract

This invention discloses a welding device and method for a rocket head of an injection molding machine, specifically relating to the technical field of welding equipment. The injection molding machine rocket head welding device includes a worktable on which the rocket head is mounted. Multiple fixing components are located at the top of the worktable, outside the rocket head. A base is located at the bottom of the worktable, with a sleeve fixedly mounted at its top. A support plate is located inside the sleeve, with its top contacting the bottom of the rocket head. A vibration motor and two buffer springs are fixedly mounted at the bottom of the support plate, with the bottom of the buffer springs fixedly connected to the inner wall of the sleeve. This invention uses a vibration motor to drive the support plate to vibrate, which in turn drives the injection molding machine rocket head and the alloy block to vibrate. This vibration promotes the flow of the molten portions of both components, allowing for more uniform mixing and improving the mixing effect. This results in a stronger bond after solidification.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a welding device and method for a rocket head of an injection molding machine. Background Technology

[0002] The injection molding machine rocket head is an accessory used in injection molding machines. It is also known as the glue dispensing head or glue separating head. Its main function is to mix the plastic melt, making the melt uniform, and at the same time, it plays a role in limiting the forward and backward movement of the glue dispensing ring.

[0003] To improve the service life of the rocket head of an injection molding machine, existing technology involves embedding and welding metal-ceramic blocks into and onto the tail feathers of the rocket head, which is made of mold steel. This improves the corrosion resistance and wear resistance of the rocket head, thereby extending its service life.

[0004] During the welding of the metal-ceramic block, the metal-ceramic block needs to be pressed and fixed to the tail feathers of the rocket head. Then, high-frequency heating equipment is used to melt the contact area between the metal-ceramic block and the rocket head, thus fusing the contact area together. After cooling and solidification, they are joined together as one, thus completing the welding.

[0005] However, during the welding process, the metal-ceramic block needs to be pressed against the outer end of the rocket head. After the contact area between the two melts, the molten parts need to be mixed. However, the fluid formed after the metal melts is very viscous and has poor fluidity, so the mixing effect needs to be improved. Summary of the Invention

[0006] The purpose of this invention is to provide a welding device and method for a rocket head of an injection molding machine. By driving the rocket head and alloy block of the injection molding machine to vibrate, the vibration can promote the flow of the molten parts of the two, so that the molten parts of the two can be mixed more evenly, thereby improving the mixing effect and making the connection stronger after solidification.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a rocket head welding device for injection molding machines, used to weld multiple alloy blocks to the outer end of the rocket head of an injection molding machine, including a worktable, wherein the rocket head of the injection molding machine is disposed on the worktable, and multiple fixing components are provided at the top of the worktable, wherein the fixing components are located on the outer side of the rocket head of the injection molding machine.

[0008] The workbench is provided with a base at the bottom, and a sleeve is fixedly provided at the top of the base. A support plate is provided inside the sleeve. The support plate is made of high temperature resistant insulating material. The top of the support plate is in contact with the bottom of the injection molding machine's rocket head.

[0009] The bottom end of the pallet is fixedly equipped with a vibration motor and two buffer springs, and the bottom end of the buffer springs is fixedly connected to the inner wall of the sleeve.

[0010] Furthermore, each of the fixing components corresponds to one alloy block, and the fixing component is used to press and fix the corresponding alloy block to the outer end of the injection molding machine rocket head;

[0011] The fixing assembly includes a cylinder mounted on the top of the workbench. One end of the piston rod of the cylinder is fixedly provided with a push rod, and one end of the push rod is fixedly provided with a push plate. The push plate is made of high-temperature resistant polysulfone material.

[0012] Furthermore, an alumina ceramic plate is embedded at the top of the workbench. The alumina ceramic plate serves as an electromagnetic insulator. A material feeding groove is formed at the top of the alumina ceramic plate, and a mounting hole penetrating the alumina ceramic plate is formed at the center of the alumina ceramic plate. The top of the mounting hole is located inside the material feeding groove.

[0013] Furthermore, the top of the injection molding machine rocket head is provided with a heating component, the heating component including a top plate located directly above the injection molding machine rocket head, and an electric push rod is fixedly provided at the top of the top plate;

[0014] Each alloy block has an induction coil on both sides. The end of the induction coil away from the alloy block is fixed with a fixing post. The top of the fixing post is fixedly connected to the bottom of the top plate. The induction coil is powered by a high-frequency heating power supply. All the induction coils are connected in series in the same circuit.

[0015] Furthermore, multiple supporting columns are provided between the workbench and the base, and an annular airbag made of high-temperature resistant material is fixed on the inner wall of the sleeve. The annular airbag is elastic.

[0016] The outer end of the annular airbag is fixedly provided with an air guide tube extending to the outside of the sleeve. Air can enter and exit the annular airbag through the air guide tube. A valve is fixedly provided on the air guide tube. The lower half of the injection molding machine rocket head extends into the inside of the sleeve and is clamped and fixed by the annular airbag.

[0017] The present invention also includes a welding method for the injection molding machine rocket head welding equipment, the specific steps of which are as follows:

[0018] Step 1: Extend the lower half of the injection molding machine rocket head through the mounting hole into the sleeve, and embed the upper half above the worktable into the material feeding groove. The outline of the central part of the material feeding groove roughly matches the injection molding machine rocket head, so that the injection molding machine rocket head can be embedded into the material feeding groove. Then inflate the annular airbag to expand it and contract the inner space to clamp and fix the lower half of the injection molding machine rocket head.

[0019] Step 2: Place the alloy block inside the material feeding trough. Multiple branches extend from the outer side of the center of the material feeding trough. One end of each branch extends to the worktable. The alloy block can be embedded in the branch and, under the push of the fixing component, moves along the branch towards the center of the material feeding trough. Finally, it is embedded in the corresponding position on the outer end of the injection molding machine's rocket head. By extending the cylinder, the push rod and push plate are pushed to move. The push plate pushes the alloy block to move and presses it firmly and fixes it in the corresponding position on the outer end of the injection molding machine's rocket head.

[0020] Step 3: Then, the electric push rod drives the heating component to move downwards. The heating component moves downwards as a whole, causing the induction coil to move to both sides of the corresponding alloy block. Then, under the action of the high-frequency heating power supply, the induction coil is energized. After the induction coil is energized, eddy currents are generated in the alloy block and the injection molding machine rocket head. The eddy currents will cause the alloy block and the injection molding machine rocket head to heat up and melt. In this way, the induction coil is used to heat the connection between the alloy block and the injection molding machine rocket head. The metal at the connection point melts and mixes, thus performing welding.

[0021] Step 4: During the heating process, under the elastic force of the buffer spring, the tray is in close contact with the injection molding machine rocket head. After the vibration motor is turned on, the vibration motor will cause the tray to vibrate and affect the injection molding machine rocket head and alloy block. The vibration of the injection molding machine rocket head and alloy block can help the molten part at the joint of the two to mix. After the heating is completed, the vibration motor stops vibrating.

[0022] Step 5: After heating, the high-frequency heating power supply is turned off. The electric push rod drives the heating component to move up and return to its original position. After cooling and solidification, the fixing component releases the alloy block and releases the clamping fixation on the injection molding machine rocket head. The injection molding machine rocket head is then removed from the worktable, and the welding is completed.

[0023] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0024] The vibration motor drives the pallet to vibrate, which in turn drives the injection molding machine's rocket head and alloy block to vibrate. The vibration promotes the flow of the molten parts of the two, allowing them to mix more evenly, thus improving the mixing effect and making the connection stronger after solidification. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is an overall structural diagram of the present invention;

[0027] Figure 2 This is a structural diagram of the rocket head of the injection molding machine according to the present invention;

[0028] Figure 3 This is a structural diagram of the fixing component of the present invention;

[0029] Figure 4 This is a structural diagram of the heating assembly of the present invention;

[0030] Figure 5 This is a circuit diagram of the induction coil of the present invention;

[0031] Figure 6 This is a structural diagram of the workbench of the present invention;

[0032] Figure 7 This is a cross-sectional view of the sleeve of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Injection molding machine rocket head; 101. Alloy block; 2. Worktable; 3. Alumina ceramic plate; 4. Base; 5. Fixing assembly; 501. Cylinder; 502. Push rod; 503. Push plate; 6. Heating assembly; 601. Top plate; 602. Fixing column; 603. Induction coil; 7. Buffer spring; 8. Electric push rod; 9. Mounting hole; 10. Material feed trough; 11. Column; 12. Sleeve; 13. Annular airbag; 14. Support plate; 15. Vibration motor. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] This invention provides, for example Figure 1-7 The shown is a rocket head welding device for injection molding machines, used to weld multiple alloy blocks 101 to the outer end of the rocket head 1 of the injection molding machine. It includes a worktable 2, the rocket head 1 of the injection molding machine is disposed on the worktable 2, and multiple fixing components 5 are provided at the top of the worktable 2. The fixing components 5 are located on the outside of the rocket head 1 of the injection molding machine.

[0037] The top of the workbench 2 is inlaid with an alumina ceramic plate 3. The function of the alumina ceramic plate 3 is electromagnetic insulation and will not heat the workbench 2. A material feeding groove 10 is opened at the top of the alumina ceramic plate 3. A mounting hole 9 is opened through the alumina ceramic plate 3 at the center. The top of the mounting hole 9 is located inside the material feeding groove 10.

[0038] The lower half of the injection molding machine rocket head 1 extends through the mounting hole 9 to the bottom of the worktable 2 and is clamped and fixed. The upper half remaining above the worktable 2 is embedded in the material distribution groove 10. The outline of the central part of the material distribution groove 10 roughly fits the injection molding machine rocket head 1, so that the injection molding machine rocket head 1 can be embedded in the material distribution groove 10. The alloy block 101 is placed inside the material distribution groove 10. Multiple branches extend from the outer side of the central part of the material distribution groove 10. The alloy block 101 can be embedded in the branch and, under the push of the fixing component 5, moves along the branch towards the central part of the material distribution groove 10, and finally is embedded in the corresponding position at the outer end of the injection molding machine rocket head 1.

[0039] Before welding, the alloy block 101 needs to be pressed and fixed to the outer end of the rocket head 1 of the injection molding machine, such as... Figure 1 , 3 As shown, the fixing component 5 corresponds one-to-one with the alloy block 101. The fixing component 5 is used to press and fix the corresponding alloy block 101 to the outer end of the injection molding machine rocket head 1. The fixing component 5 includes a cylinder 501 provided at the top of the worktable 2. One end of the piston rod of the cylinder 501 is fixedly provided with a push rod 502.

[0040] One end of the top rod 502 is fixedly provided with a push plate 503, which is in contact with the corresponding alloy block 101. The push plate 503 is made of high-temperature resistant polysulfone material.

[0041] The cylinder 501 extends, pushing the push rod 502 and the push plate 503 to move. The push plate 503 pushes the alloy block 101 to move and presses it firmly to the corresponding position on the outer end of the injection molding machine rocket head 1.

[0042] Welding is performed using the principle of high-frequency heating, such as... Figure 1 , 4 As shown in Figure 5, the top of the injection molding machine rocket head 1 is provided with a heating component 6. The heating component 6 includes a top plate 601 located directly above the injection molding machine rocket head 1. An electric push rod 8 is fixedly provided at the top of the top plate 601. The top of the electric push rod 8 is installed and fixed on an object other than the welding equipment.

[0043] Each alloy block 101 is provided with an induction coil 603 on both sides. The induction coil 603 can generate an induced current at the contact point between the injection molding machine rocket head 1 and the alloy block 101, thereby heating the contact point between the two. The end of the induction coil 604 away from the alloy block 101 is fixedly provided with a fixing post 602. The top end of the fixing post 602 is fixedly connected to the bottom end of the top plate 601. The overall height of the heating assembly 6 is controlled by the extension and retraction of the electric push rod 8.

[0044] The heating component 6 is moved downward by the electric push rod 8. The heating component 6 moves downward as a whole, so that the induction coil 603 moves to both sides of the corresponding alloy block 101. Then, the induction coil 603 is energized by the high-frequency heating power supply. After the induction coil 603 is energized, eddy currents are generated in the alloy block 101 and the injection molding machine rocket head 1. The eddy currents will cause the alloy block 101 and the injection molding machine rocket head 1 to heat up and melt. In this way, the connection between the alloy block 101 and the injection molding machine rocket head 1 is heated by the induction coil 603. The metal at the connection point melts and mixes. After the part cools and solidifies, the alloy block 101 can be welded to the injection molding machine rocket head 1.

[0045] During the welding process, the lower half of the injection molding machine rocket head 1 needs to be fixed, such as... Figure 7 As shown, the workbench 2 has a base 4 at its bottom, and a plurality of columns 11 for supporting the workbench 2 are provided between the workbench 2 and the base 4. A sleeve 12 is fixedly provided at the top of the base 4.

[0046] An annular airbag 13 made of high-temperature resistant material is fixedly provided on the inner wall of the sleeve 12. The annular airbag 13 is insulated and can expand and contract its inner space after being inflated. An air guide tube extending to the outside of the sleeve 12 is fixedly provided at the outer end of the annular airbag 13. A valve is fixedly provided on the air guide tube. The lower half of the injection molding machine rocket head 1 extends into the inside of the sleeve 12 and is clamped and fixed by the annular airbag 13.

[0047] After the lower half of the injection molding machine rocket head 1 passes through the mounting hole 9, it extends into the sleeve 12. Then, the annular airbag 13 is inflated to expand and contract the inner space, and the lower half of the injection molding machine rocket head 1 is clamped and fixed inside the sleeve 12 by the annular airbag 13.

[0048] To make the connection between alloy block 101 and injection molding machine rocket head 1 more secure, such as Figure 7 As shown, the sleeve 12 is provided with a support plate 14 inside. The support plate 14 is made of insulating material. The top of the support plate 14 is in contact with the bottom of the injection molding machine rocket head 1. The bottom of the support plate 14 is fixedly provided with a vibration motor 15 and two buffer springs 7. The bottom of the buffer springs 7 is fixedly connected to the inner wall of the sleeve 12.

[0049] During the heating process, under the elastic force of the buffer spring 7, the tray 14 is in close contact with the injection molding machine rocket head 1. After the vibration motor 15 is turned on, the vibration motor 15 will cause the tray 14 to vibrate and affect the injection molding machine rocket head 1 and the alloy block 101. The connection between the two has melted into a fluid after heating. Under the action of vibration, the fluid can mix with each other. Therefore, the vibration makes the melted parts of the two mix more evenly, and the connection will be more firm after solidification.

[0050] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rocket head welding apparatus for injection molding machine rocket head (1) for welding a plurality of alloy blocks (101) at the outer end of the injection molding machine rocket head (1) comprising a workbench (2), said injection molding machine rocket head (1) is provided on the workbench (2), characterized in that: The top of the workbench (2) is provided with a plurality of fixed components (5), which are located outside the rocket head (1) of the injection molding machine; The bottom of the workbench (2) is provided with a base (4), and the top of the base (4) is fixedly provided with a sleeve (12), and the inside of the sleeve (12) is provided with a supporting plate (14), and the top of the supporting plate (14) is in contact with the bottom end of the rocket head (1) of the injection molding machine; The bottom end of the supporting plate (14) is fixedly provided with a vibration motor (15) and two buffer springs (7), and the bottom end of the buffer spring (7) is fixedly connected with the inner wall of the sleeve (12); The fixed component (5) corresponds to the alloy block (101) one by one, and the fixed component (5) is used for pressing and fixing the corresponding alloy block (101) at the outer end of the rocket head (1) of the injection molding machine; The fixed component (5) includes a cylinder (501) arranged at the top of the workbench (2), and the piston rod of the cylinder (501) is fixedly provided with a top rod (502) at one end, and the top rod (502) is fixedly provided with a push plate (503) at one end; The top of the rocket head (1) of the injection molding machine is provided with a heating assembly (6), and the heating assembly (6) includes a top plate (601) located directly above the rocket head (1) of the injection molding machine, and the top end of the top plate (601) is fixedly provided with an electric push rod (8); Each alloy block (101) is provided with an induction coil (603) on both sides, and the end of the induction coil (603) away from the alloy block (101) is fixedly provided with a fixed column (602), and the top end of the fixed column (602) is fixedly connected with the bottom end of the top plate (601); A plurality of supporting columns (11) are arranged between the workbench (2) and the base (4), and the inner wall of the sleeve (12) is fixedly provided with an annular air bag (13) made of high-temperature-resistant material; The outer end of the annular air bag (13) is fixedly provided with a gas guide pipe extending to the outside of the sleeve (12), and the gas guide pipe is fixedly provided with a valve, and the lower half of the rocket head (1) of the injection molding machine extends into the sleeve (12) and is clamped and fixed by the annular air bag (13).

2. A rocket weld apparatus for an injection molding machine as defined in claim 1, wherein: The top of the workbench (2) is embedded with an alumina ceramic flat plate (3), and the top of the alumina ceramic flat plate (3) is provided with a cloth groove (10), and the center of the alumina ceramic flat plate (3) is provided with a mounting hole (9) penetrating through the alumina ceramic flat plate (3), and the top end of the mounting hole (9) is located in the cloth groove (10).

3. A method of welding a rocket head of an injection molding machine as defined in claim 2, characterized in that: The specific steps are as follows: Step one: the lower half of the rocket head (1) of the injection molding machine extends into the sleeve (12) through the mounting hole (9), and the upper half left above the workbench (2) is embedded in the cloth groove (10), then the annular air bag (13) is inflated to expand and shrink the inside space, and the lower half of the rocket head (1) of the injection molding machine is clamped and fixed; Step two: place the alloy block (101) in the cloth groove (10), extend the cylinder (501), push the top rod (502) and the push plate (503) to move, and the push plate (503) pushes the alloy block (101) to move and tightly fixes it at the corresponding position of the outer end of the rocket head (1) of the injection molding machine; Step three: then the electric push rod (8) drives the heating assembly (6) to move down, the heating assembly (6) moves down as a whole, so that the induction coil (603) moves to the both sides of the corresponding alloy block (101), then the induction coil (603) is powered, the induction coil (603) is used to heat the connection part of the alloy block (101) and the injection molding machine rocket head (1), the metal of the connection part is melted and mixed, so as to carry out welding; Step four: during the heating process, under the elastic force of the buffer spring (7), the supporting plate (14) is in close contact with the injection molding machine rocket head (1), after the vibration motor (15) is turned on, the vibration motor (15) will make the supporting plate (14) vibrate and affect the injection molding machine rocket head (1) and the alloy block (101), the vibration of the injection molding machine rocket head (1) and the alloy block (101) can help the mixed part of the joint between the two to melt, after the heating is completed, the vibration motor (15) stops vibrating; Step five: after heating, the induction coil (603) is powered off, the electric push rod (8) drives the heating assembly (6) to move up and return to the original position, after cooling and solidification, the fixing assembly (5) releases the alloy block (101) and releases the clamping and fixing of the injection molding machine rocket head (1), the injection molding machine rocket head (1) is taken off from the workbench (2), and the welding is completed.

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