Injection molding nozzle

Abstract

The utility model provides an injection molding nozzle, which belongs to the field of injection molding nozzles, and comprises a connecting pipe, the nozzle assembly is capable of preventing overflow; the nozzle assembly comprises a nozzle body detachable from the connecting pipe, a nozzle circular pipe is fixed to the end, away from the connecting pipe, of the nozzle body, an anti-overflow piece capable of being reset is slidably mounted in the nozzle circular pipe, molten plastic is injected into the nozzle body, the anti-overflow piece is driven to move through pressure, the nozzle circular pipe is not blocked, and the nozzle circular pipe is fixed to the nozzle body. The pressure in the nozzle main body is reduced, the anti-overflow sheet is reset to block the nozzle circular pipe, and the width of the fixing block is smaller than one third of the inner diameter of the connecting pipe. The nozzle is connected in a threaded mode, the connection stability can be guaranteed, the nozzle body can be conveniently detached, melt residues inside the nozzle body can be conveniently cleaned, the nozzle round pipe is blocked through the anti-overflow piece, and the problem that molten plastic flows out of the nozzle round pipe, and inconvenience is brought to other people and work is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding nozzles, in particular to an injection molding nozzle. Background Art

[0002] The nozzle is a device used for injection molds in the field of injection molding. The molten plastic is injected into the mold through the nozzle, and the plastic cools down in the mold to produce plastic products.

[0003] In the prior art, most nozzles are open, and molten plastic easily flows out of the nozzle opening, causing the problem of overflow. Overflow not only causes waste of raw materials, but also the high-temperature overflow may burn the operator. In addition, overflow has some adverse effects on the injection molding process, such as overflow dripping and sticking to the mold, affecting the normal use of the mold; overflow dripping on plastic products, plastic products are burned and deformed, causing scrap; for this reason, the present application proposes a nozzle structure that uses pressure to drive the injection nozzle to open and close. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an injection molding nozzle.

[0005] The embodiment of the utility model provides an injection molding nozzle, comprising:

[0006] Connecting pipe;

[0007] A nozzle assembly capable of preventing material from overflowing; the nozzle assembly comprises a nozzle body detachable from a connecting tube, a nozzle round tube is fixed to one end of the nozzle body away from the connecting tube, a resettable anti-overflow sheet is slidably installed in the nozzle round tube, molten plastic is injected into the nozzle body, the anti-overflow sheet is driven to move by pressure, the nozzle round tube is not blocked, injection molding can be performed, the pressure in the nozzle body is reduced, and the anti-overflow sheet is reset to block the nozzle round tube.

[0008] Furthermore, the connecting pipe is provided with a thread head, and the inner wall of the nozzle body is provided with an internal thread groove, and the thread head and the internal thread groove are threadably engaged to fix the connecting pipe and the nozzle body together.

[0009] Furthermore, a fixed block is fixed to the inner wall of the connecting tube, a sliding pull rod is passed through the fixed block, the pull rod is fixedly connected to the anti-overflow sheet, a limiting plate is fixed to one end of the pull rod away from the anti-overflow sheet, and a spring is provided between the limiting plate and the fixed block.

[0010] Furthermore, one end of the spring is fixedly connected to the fixed block, the other end of the spring is fixedly connected to the limiting plate, and the spring sleeve is arranged outside the pull rod.

[0011] Furthermore, the width of the fixing block is smaller than one third of the inner diameter of the connecting pipe.

[0012] Furthermore, the nozzle body is a reducing tube.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model is connected by means of threads, which not only ensures the stability of the connection but also facilitates the disassembly of the nozzle body so as to clean the residual melt inside. The anti-overflow sheet seals the nozzle tube to prevent the molten plastic from flowing out of the nozzle tube and causing inconvenience to others and work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an injection molding nozzle described in an embodiment of the utility model.

[0016] Figure 2 This is a disassembled diagram of an injection molding nozzle described in an embodiment of the utility model.

[0017] Figure 3 It is a cross-sectional view of an injection molding nozzle described in an embodiment of the utility model.

[0018] In the above drawings: 1 connecting pipe, 2 nozzle body, 3 nozzle round tube, 4 anti-overflow sheet, 5 threaded head, 6 pull rod, 7 fixing block, 8 limit sheet, 9 spring. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1-Figure 3 As shown, the embodiment of the utility model provides an injection molding nozzle, comprising:

[0021] A connecting pipe 1, wherein the inner wall or the outer wall of the connecting pipe 1 may be provided with threads so as to be connected to an injection molding machine;

[0022] A nozzle assembly capable of preventing overflow; the nozzle assembly comprises a nozzle body 2 detachable from a connecting pipe 1, the nozzle body 2 being a reducer, wherein one end of the connecting pipe 1 close to the nozzle body 2 is reduced in diameter, and the nozzle body 2 is tangentially arranged to the reduced diameter portion, so as not to hinder the molten flow of plastic; a threaded head 5 is provided on the connecting pipe 1, and an internal threaded groove is provided on the inner wall of the nozzle body 2, and the threaded head 5 is threadedly engaged with the internal threaded groove to fix the connecting pipe 1 and the nozzle body 2 together, and the connection by means of threads can not only ensure the stability of the connection, but also facilitate the disassembly of the nozzle body 2 so as to clean the internal melt residue;

[0023] A nozzle round tube 3 is fixed to one end of the nozzle body 2 away from the connecting tube 1, and the nozzle body 2 and the nozzle round tube 3 are integrally formed; a repositionable anti-overflow sheet 4 is slidably installed in the nozzle round tube 3. Specifically, when the molten plastic flows to the nozzle body 2 through the connecting tube 1, the molten plastic and the anti-overflow sheet 4 are abutted against each other. As the pressure at the nozzle body 2 increases, and this pressure value is greater than the elastic force of the spring 9, the anti-overflow sheet 4 is driven to move. At this time, the anti-overflow sheet 4 no longer blocks the nozzle round tube 3, so that the molten plastic can be discharged through the nozzle round tube 3 for injection molding.

[0024] A fixing block 7 is fixed to the inner wall of the connecting pipe 1, and the width of the fixing block 7 is less than one third of the inner diameter of the connecting pipe 1, which can reduce the obstruction to the flowing molten fluid; wherein the fixing block 7 is connected to the connecting pipe 1 by welding;

[0025] A sliding pull rod 6 is provided through the fixed block 7, and the pull rod 6 is fixedly connected to the anti-overflow sheet 4. A limiting sheet 8 is fixed to one end of the pull rod 6 away from the anti-overflow sheet 4. A spring 9 is provided between the limiting sheet 8 and the fixed block 7, and one end of the spring 9 is fixedly connected to the fixed block 7, and the other end of the spring 9 is fixedly connected to the limiting sheet 8, and the spring 9 is sleeved on the outside of the pull rod 6;

[0026] The molten plastic is injected into the nozzle body 2, and the anti-overflow sheet 4 is driven to move by pressure, and the nozzle tube 3 is not blocked, so that injection molding can be performed. The pressure in the nozzle body 2 is reduced, and the anti-overflow sheet 4 is reset to block the nozzle tube 3;

[0027] More specific explanation: when the molten plastic flows to the nozzle body 2 through the connecting pipe 1, the molten plastic abuts against the anti-overflow sheet 4. As the pressure at the nozzle body 2 increases and this pressure value is greater than the elastic force of the spring 9, the anti-overflow sheet 4 is driven to move. At this time, the anti-overflow sheet 4 no longer blocks the nozzle tube 3, so that the molten plastic can be discharged through the nozzle tube 3 for injection molding.

[0028] The movement of the anti-overflow sheet 4 drives the pull rod 6 and the limit sheet 8 to move, and the spring 9 is in a compressed state at this time;

[0029] After the injection molding work is completed, the pressure of injecting molten plastic into the nozzle body 2 is reduced, and the limiting plate 8 can be reset by the spring 9. The reset of the limiting plate 8 drives the pull rod 6 and the anti-overflow plate 4 to reset. The anti-overflow plate 4 blocks the nozzle tube 3, preventing the molten plastic from flowing out of the nozzle tube 3 and causing inconvenience to others and work.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An injection molding nozzle, characterized in that: include: Connecting pipe (1); A nozzle assembly capable of preventing material from overflowing; the nozzle assembly comprises a nozzle body (2) detachable from a connecting tube (1); a nozzle round tube (3) is fixed to one end of the nozzle body (2) away from the connecting tube (1); a repositionable anti-overflow sheet (4) is slidably mounted in the nozzle round tube (3); molten plastic is injected into the nozzle body (2), the anti-overflow sheet (4) is driven to move by pressure, the nozzle round tube (3) is not blocked, and injection molding can be performed; the pressure in the nozzle body (2) is reduced, and the anti-overflow sheet (4) is reset to block the nozzle round tube (3); a threaded head (5) is provided on the connecting tube (1), and an internal threaded groove is provided on the inner wall of the nozzle body (2); the threaded head (5) is threadedly engaged with the internal threaded groove to fix the connecting tube (1) and the nozzle body (2) together.

2. An injection molding nozzle according to claim 1, characterized in that: in: A fixed block (7) is fixed to the inner wall of the connecting pipe (1), a slidably arranged pull rod (6) passes through the fixed block (7), the pull rod (6) is fixedly connected to the anti-overflow material sheet (4), a limiting plate (8) is fixed to one end of the pull rod (6) away from the anti-overflow material sheet (4), and a spring (9) is provided between the limiting plate (8) and the fixed block (7).

3. An injection molding nozzle according to claim 2, characterized in that: in: One end of the spring (9) is fixedly connected to the fixed block (7), the other end of the spring (9) is fixedly connected to the limiting plate (8), and the spring (9) is sleeved on the outside of the pull rod (6).

4. An injection molding nozzle according to claim 2, characterized in that: in: The width of the fixing block (7) is less than one third of the inner diameter of the connecting pipe (1).

5. The injection molding nozzle according to claim 1, characterized in that: in: The nozzle body (2) is a reducer tube.

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