A device to prevent high-temperature plastic splashing

Abstract

A device for preventing high-temperature plastic splashing. This solves the problem in existing injection molding machines where molten plastic easily splashes onto the heating coil, potentially burning it. It includes a material hopper, and further includes: a pusher rod disposed within the hopper to push the material out; a connecting flange connected to the hopper, the connecting flange having a spray channel; a nozzle disposed on the connecting flange, the nozzle including a spray head; the spray channel extending to the nozzle and spraying material out through the spray head; a heating element for heating the material; and a protective cover disposed at the nozzle and fixed to it, the protective cover being located behind the spray head and extending towards the pusher rod, covering the outside of the heating element at the nozzle. The beneficial effect of this invention is that the protective cover at the nozzle protects the heating element attached to the nozzle, preventing damage to the heating element from high-temperature splashing plastic.

Description

Technical Field

[0001] This utility model relates to an injection molding machine, specifically to a device for preventing high-temperature plastic splashing. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. The process involves using the thrust of a screw (or plunger) to inject pre-plasticized molten plastic (i.e., viscous flow state) from a barrel into a closed mold cavity, where it solidifies and sets to obtain the finished product. Injection molding is a cyclical process, with each cycle mainly including: metered feeding – melting and plasticizing – injection under pressure – mold filling and cooling – mold opening and part removal. After removing the plastic part, the mold is closed again for the next cycle.

[0003] Existing injection molding machines typically include a barrel, screw, and nozzle. A heating element is usually installed at the nozzle. During operation, the plastic in the barrel is heated to a high temperature, generally between 180 and 300°C. When the operator manually or otherwise presses the injection button, the screw in the barrel is pushed forward by the hydraulic cylinder. At this moment, the molten plastic in the barrel is instantly ejected through the injection channel and nozzle orifice. The ejected plastic directly contacts the mold. If the nozzle does not make good contact with the mold, or if there is no contact, the high-temperature plastic will splatter, which is especially dangerous with heated nylon. The heating coil on the barrel will be surrounded by the splattered plastic, which will directly splash onto the heating coil. It is crucial to clean the surface plastic promptly, otherwise, an accident will occur. Over time, the heating coil will burn out, requiring replacement. This is even more dangerous with heated nylon, which is in a liquid state. According to data from the company's after-sales department, a high percentage of machine repairs require heating coil burnout. Utility Model Content

[0004] To address the problem in the prior art that molten plastic in existing injection molding machines easily splashes onto the heating coil during operation, potentially burning it, this invention provides a device to prevent high-temperature plastic splashing.

[0005] The technical solution of this utility model is: a high-temperature plastic splash prevention device, including a material bucket, and further comprising:

[0006] The push rod is located inside the material bucket and is used to push the material out of the bucket;

[0007] A connecting flange is provided for connection to the material barrel, and the connecting flange is provided with a spray channel;

[0008] A nozzle is provided on a connecting flange, the nozzle including a spray head; the spray channel extends to the nozzle and sprays material out by the spray head;

[0009] Heating components are used for heating materials;

[0010] A protective cover is provided at the nozzle and fixed to the nozzle. The protective cover is located behind the nozzle head and extends towards the push rod, covering the outside of the heating assembly at the nozzle.

[0011] As a further improvement of this utility model, the connecting flange is provided with a transition joint, and the nozzle is connected to the transition joint.

[0012] As a further improvement of this utility model, the nozzle passes through the protective cover and the protective cover is fixed between the nozzle and the transition joint.

[0013] As a further improvement of this utility model, the nozzle is provided with a shoulder, and the outer wall of the protective cover faces the nozzle medium ejection direction.

[0014] As a further improvement of this utility model, the outer surface of the protective cover includes a flat portion and an arc portion, the nozzle is disposed through the center of the flat portion, and the inner wall of the flat portion of the protective cover is fitted with the transition joint.

[0015] As a further improvement of this utility model, the heating assembly includes a first heating coil and a second heating coil. The first heating coil is disposed on the outer surface of the connecting flange and / or the material barrel, the second heating coil is disposed outside the transition joint, and the protective cover is disposed on the outside of the second heating coil and is open at one end facing the push rod.

[0016] As a further improvement of this utility model, the spray channel extends from the connecting flange and transition joint to the nozzle setting, and the diameter of the orifice of the spray channel near the material barrel end is larger than the diameter of the orifice near the nozzle head.

[0017] As a further improvement to this utility model, it also includes:

[0018] Front panel, the nozzle is positioned extending beyond the front panel;

[0019] The receiving tray is located on the front plate at the other end opposite the nozzle.

[0020] As a further improvement of this utility model, the front plate is provided with mounting holes, and the lower surface of the mounting holes is an arc-shaped surface; the receiving tray is located in the extension direction of the arc-shaped surface of the mounting holes.

[0021] As a further improvement of this utility model, the receiving tray includes an inclined plate portion and a receiving portion, the inclined plate portion being arranged obliquely, and baffle portions being provided on both sides of the inclined plate portion and the receiving portion.

[0022] The beneficial effects of this invention are that a protective cover is provided at the nozzle to protect the heating component of the nozzle accessory, preventing damage to the heating component from high-temperature splashing plastic. This invention also has advantages such as simple structure, convenient assembly, reliable operation, and long service life. Attached Figure Description

[0023] Appendix Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0024] Appendix Figure 2 This is a schematic diagram of the structure after removing the front panel in an embodiment of this utility model.

[0025] Appendix Figure 3 This is a cross-sectional view of the present invention after the front panel has been removed.

[0026] Appendix Figure 4 This is a schematic diagram of the structure of the protective cover according to an embodiment of the present utility model.

[0027] Appendix Figure 5 This is a schematic diagram of the receiving tray in an embodiment of the present utility model.

[0028] Appendix Figure 6 This is a schematic diagram of the structure of this utility model embodiment in an injection molding machine.

[0029] In the diagram, 1 is the front plate; 11 is the mounting hole; 12 is the arc-shaped surface; 2 is the material barrel; 3 is the push rod; 4 is the connecting flange; 41 is the spray channel; 5 is the nozzle; 51 is the spray head; 6 is the heating assembly; 61 is the first heating ring; 62 is the second heating ring; 7 is the protective cover; 71 is the flat part; 72 is the arc part; 8 is the transition joint; 9 is the receiving tray; 91 is the inclined plate part; 92 is the receiving part; and 93 is the baffle part. Detailed Implementation

[0030] The embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0031] Depend on Figure 1 Combination Figure 2-6 As shown, a high-temperature plastic splash protection device includes a material bucket 2, and further includes:

[0032] Push rod 3 is installed inside material bucket 2 to push out the material inside material bucket 2;

[0033] A connecting flange 4 is connected to the material barrel 2, and the connecting flange 4 is provided with a spray channel 41;

[0034] Nozzle 5 is provided on connecting flange 4, and nozzle 5 includes spray head 51; spray channel 41 extends to nozzle 5 and sprays material out by spray head 51.

[0035] Heating component 6 is used for heating materials;

[0036] A protective cover 7 is provided at the nozzle 5 and fixed to the nozzle 5. The protective cover 7 is located behind the nozzle head 51 and extends towards the push rod 3, covering the outside of the heating component 6 at the nozzle 5. The beneficial effect of this utility model is that the protective cover at the nozzle protects the heating component of the nozzle accessory, preventing damage to the heating component from high-temperature splashing plastic. This utility model also has the advantages of simple structure, convenient assembly, reliable operation, and long service life.

[0037] The connecting flange 4 is equipped with a transition joint 8, and the nozzle 5 is connected to the transition joint 8. This structure facilitates nozzle installation, is easy to assemble and disassemble, and has a simple structure.

[0038] The nozzle 5 passes through the protective cover 7 and the protective cover 7 is fixed between the nozzle 5 and the transition joint 8. Specifically, the nozzle 5 is provided with a shoulder, and the outer wall of the protective cover 7 faces the direction of medium ejection from the nozzle 5. Specifically, the nozzle and the transition joint are threaded together, and the shoulder of the nozzle presses the protective cover against the end of the transition joint and limits its position.

[0039] The outer surface of the protective cover 7 includes a flat portion 71 and an arc portion 72. The nozzle 5 passes through the center of the flat portion 71, and the inner wall of the flat portion 71 of the protective cover 7 fits against the transition joint 8. The flat portion facilitates the installation of the protective cover and has a simple structure, while the arc portion facilitates the sliding of splashed high-temperature plastic onto the arc-shaped surface of the mounting hole.

[0040] The heating assembly 6 includes a first heating coil 61 and a second heating coil 62. The first heating coil 61 is located on the outer surface of the connecting flange 4 and / or the material barrel 2, and the second heating coil 62 is located outside the transition joint 8. The protective cover 7 is located outside the second heating coil 62 and is open at one end facing the push rod 3. The protective cover provides good protection and isolation for the heating assembly, thereby preventing fires and burns to operators.

[0041] The injection channel 41 extends from the connecting flange 4 and the transition joint 8 to the nozzle 5, and the diameter of the orifice of the injection channel 41 near the material tank 2 is larger than the diameter of the orifice of the nozzle head 51 near the nozzle 5. This structure facilitates material output and injection molding.

[0042] This utility model also includes:

[0043] Front plate 1, the spray head 51 is provided to extend out of the front plate 1;

[0044] The receiving tray 9 is located on the front plate 1 at the other end opposite the spray head 51. The receiving tray facilitates the collection of splashed high-temperature plastic and makes cleaning easier.

[0045] The front plate 1 is provided with mounting holes 11, and the lower surface of the mounting holes 11 is an arc-shaped surface 12; the receiving tray 9 is located in the extension direction of the arc-shaped surface 12 of the mounting holes 11. Specifically, the receiving tray 9 includes an inclined plate portion 91 and a receiving portion 92. The inclined plate portion 91 is inclined, and baffle portions 93 are provided on both sides of the inclined plate portion 91 and the receiving portion 92. The splashed high-temperature plastic (molten state, i.e., viscous flow state) falls into the protective cover or mounting hole and flows along the arc-shaped surface of the mounting hole to the receiving tray due to the properties of the fluid. The receiving tray can collect the condensed material.

[0046] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0048] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modification that utilizes the inventive concept will be included within the scope of protection of this utility model patent.

Claims

1. A device for preventing splashing of high temperature plastic, comprising a hopper (2), characterized in that: Also includes: Push rod (3) is installed inside the material bucket (2) to push out the material inside the material bucket (2); A connecting flange (4) is connected to a material bucket (2), and the connecting flange (4) is provided with a spray channel (41). A nozzle (5) is provided on a connecting flange (4), the nozzle (5) including a spray head (51); the spray channel (41) extends to the nozzle (5) and the spray head (51) sprays out the material; Heating component (6) is used for heating materials; A protective cover (7) is provided at the nozzle (5) and fixed by the nozzle (5). The protective cover (7) is located behind the nozzle head (51) and extends in the direction of the push rod (3) to cover the outside of the heating component (6) at the nozzle (5).

2. A device for preventing high temperature plastic splashing according to claim 1, characterized in that The connecting flange (4) is provided with a transition joint (8), and the nozzle (5) is connected to the transition joint (8).

3. A device for preventing high temperature plastic splashing according to claim 2, characterized in that The nozzle (5) is installed through the protective cover (7) and the protective cover (7) is fixed between the nozzle (5) and the transition joint (8).

4. The device of claim 2, wherein The nozzle (5) is provided with a shoulder, and the outer wall of the protective cover (7) faces the medium ejection direction of the nozzle (5).

5. The device of claim 1, wherein The outer surface of the protective cover (7) includes a flat portion (71) and an arc portion (72). The nozzle (5) passes through the center of the flat portion (71). The inner wall of the flat portion (71) of the protective cover (7) is in contact with the transition joint (8).

6. A device for preventing high temperature plastic splashing according to claim 2, characterized in that The heating assembly (6) includes a first heating ring (61) and a second heating ring (62). The first heating ring (61) is located on the outer surface of the connecting flange (4) and / or the material barrel (2). The second heating ring (62) is located outside the transition joint (8). The protective cover (7) is located outside the second heating ring (62) and is open at one end facing the push rod (3).

7. A device for preventing high temperature plastic splashing according to claim 2, characterized in that The spray channel (41) extends from the connecting flange (4) and the transition joint (8) to the nozzle (5), and the diameter of the end of the spray channel (41) near the material barrel (2) is larger than the diameter of the nozzle head (51) near the nozzle (5).

8. The device of claim 1, wherein Also includes: Front plate (1), the spray head (51) is set outside the front plate (1); The receiving tray (9) is located on the front plate (1) at the other end opposite to the spray head (51).

9. A device for preventing high temperature plastic splashing according to claim 8, characterized in that The front plate (1) is provided with mounting holes (11), and the lower surface of the mounting holes (11) is an arc-shaped surface (12); the receiving tray (9) is located in the extension direction of the arc-shaped surface (12) of the mounting holes (11).

10. The high temperature plastic splash guard of claim 8, wherein The receiving tray (9) includes an inclined plate portion (91) and a receiving portion (92). The inclined plate portion (91) is inclined, and baffle portions (93) are provided on both sides of the inclined plate portion (91) and the receiving portion (92).

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