Stable nozzle of injection molding machine

Abstract

The utility model provides a stable nozzle of an injection molding machine, which comprises a nozzle body, one end of the nozzle body is provided with an external thread section, a charging barrel cover is provided with a threaded hole in threaded connection with the external thread section, and the outer end of the threaded hole is connected with a coaxial outer support hole; the tail end of the external thread section is connected with a tail supporting column; the diameter of the tail supporting column is larger than that of the external thread section. And the tail supporting column is inserted into the outer supporting hole and is in close fit connection with the outer supporting hole. When the nozzle body is subjected to radial force, the tail supporting column and the outer supporting hole become force bearing points, the outer threaded section and the threaded hole are not subjected to the radial force, and therefore threads are not damaged, and dismounting of the nozzle body is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a stable nozzle for injection molding machines. Background Art

[0002] The injection molding machine is equipped with a nozzle for injecting molten plastic into the mold. This nozzle is generally connected to the barrel cover with threads. After long-term use, the nozzle will be subjected to radial force due to the movement of the barrel and the action of gravity, resulting in slight deformation, which will cause damage to the nozzle thread and make it difficult to disassemble the nozzle. Utility Model Content

[0003] In order to solve the technical problems in the background technology, the utility model discloses a stable nozzle for an injection molding machine.

[0004] The utility model provides a stable nozzle for an injection molding machine, comprising a nozzle body, one end of which is provided with an external thread section, a barrel head at the outlet position of a barrel cover is provided with a threaded hole threadedly connected with the external thread section, and the outer end of the threaded hole is connected with a coaxial external support hole;

[0005] The tail end of the external thread section is connected with a tail support column;

[0006] The diameter of the tail support column is larger than the diameter of the external thread section;

[0007] The tail support column is inserted into the outer support hole and is tightly connected.

[0008] When the nozzle body is subjected to radial force, the tail support column and the outer support hole become force points, while the outer thread section and the threaded hole are not subjected to radial force, so their threads are not damaged and the disassembly of the nozzle body is not affected.

[0009] If the contact area between the tail support column and the outer support hole is too large, it will affect the difficulty of installing the nozzle body; if the contact area is too small, the supporting effect will be poor. Based on this, further improvements are made: the depth of the tail support column inserted into the outer support hole is 2±0.2mm.

[0010] The tail support column and the external thread section are connected in sequence, and the molding difficulty is relatively high. Based on this, further improvements are as follows: a transition section is also connected between the tail support column and the external thread section; the diameter of the transition section is smaller than the diameter of the external thread section; there is an arc transition between the transition section and the tail support column; and there is an inclined transition between the transition section and the external thread section.

[0011] The nozzle body is supported only by the tail support column and the outer support hole, and it is easy to form a fulcrum at the connection between the tail support column and the outer support hole, causing damage to the thread. Based on this, further improvements are: the inner end of the threaded hole is connected to a coaxial inner support hole; the diameter of the inner support hole is smaller than the diameter of the threaded hole; the head of the external threaded section is connected to a head support column; the head support column is inserted into the inner support hole and is tightly connected.

[0012] Since the inner support hole is at the inner end of the threaded hole and is difficult to form, a further improvement is made based on this: the inner end of the inner support hole is connected with an annular groove, whose diameter is larger than the support hole; the annular groove and the support hole are transitioned through an inclined surface.

[0013] If the contact area between the head support column and the inner support hole is too large, it will affect the installation difficulty of the nozzle body; if the contact area is too small, the support effect will be poor. Based on this, further improvements are made: the contact surface length between the head support column and the inner support hole is 3±0.5mm.

[0014] In order to facilitate the disassembly and assembly of the nozzle body, a further design is that the outer wall of the nozzle body is also provided with a plurality of evenly distributed slots. With such an arrangement, a tool can be inserted into the slots, which facilitates the twisting of the nozzle body.

[0015] The position and diameter of the card slot affect the stability of the nozzle sneeze twisting. Based on this, a further improvement is that the card slot is located on the outside of the tail support column and close to the tail support column.

[0016] To facilitate the forming of the slot, a further design is as follows: a reinforcement column is connected to the outside of the tail support column; the slot is arranged on the outside of the reinforcement column; when the nozzle body is installed, the reinforcement column abuts against the barrel head to achieve positioning. With this arrangement, the slot runs through both axial sides of the reinforcement column, making processing more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a front sectional view of the utility model;

[0020] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0021] Figure 4 is a front cross-sectional view of the nozzle body;

[0022] Figure 5 It is the main sectional view of the barrel cover;

[0023] Figure 6 yes Figure 5 The enlarged view of point B in the middle;

[0024] In the figure: 1. nozzle body; 2. barrel head; 11. external threaded section; 12. tail support column; 13. transition section; 14. head support column; 15. slot; 16. reinforcement column; 21. threaded hole; 22. external support hole; 23. internal support hole; 24. annular groove. DETAILED DESCRIPTION

[0025] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0026] like Figure 1-3 As shown, the utility model discloses a stable nozzle for an injection molding machine, comprising a nozzle body 1, one end of which is provided with an external thread section 11; a barrel head 2 at the outlet position of the barrel cover is provided with a threaded hole 21 threadedly connected to the external thread section 11, so that the nozzle body 1 is fixed to the barrel head 2 by threaded connection.

[0027] like Figure 5 and Figure 6 As shown, the outer end of the threaded hole 21 is connected to a coaxial outer support hole 22, and the inner end is connected to a coaxial inner support hole 23. The aperture of the outer support hole 22 is larger than the aperture of the threaded hole 21, and the aperture of the inner support hole 23 is smaller than the aperture of the threaded hole 21. The tail end of the external threaded section 11 is connected to a coaxially arranged tail support column 12, and the head end is connected to a coaxially arranged head support column 14. The head support column 14 is inserted into the inner support hole 23 and fits tightly; the tail support column 12 is inserted into the outer support hole 22 and fits tightly. With such a configuration, when the nozzle body 1 is subjected to radial force, the tail support column 12 and the outer support hole 22 become force points, and the head support column 14 and the inner support hole 23 also become force points, while the external threaded section 11 and the threaded hole 21 will not be subjected to the radial force, so their threads will not be damaged, and the disassembly of the nozzle body 1 will not be affected.

[0028] The depth of the tail support column 12 inserted into the outer support hole 22 is 2±0.2mm, and the contact surface length of the head support column 14 and the inner support hole 23 is 3±0.5mm. In this way, while ensuring sufficient support strength, the contact area between the tail support column 12 and the outer support hole 22 is reduced, and the contact area between the head support column 14 and the inner support hole 23 is reduced, thereby facilitating the installation of the nozzle body.

[0029] like Figure 4 As shown, a transition section 13 is connected between the tail support column 12 and the external thread section 11; the diameter of the transition section 13 is smaller than the diameter of the external thread section 11; the transition between the transition section 13 and the tail support column 12 is an arc transition; the transition between the transition section 13 and the external thread section 11 is an inclined transition. This facilitates the molding of the external thread section 11 and the tail support column 12.

[0030] The outer side of the tail support column 12 is also connected to a coaxial reinforcing column 16, and the diameter of the reinforcing column 16 is larger than that of the tail support column 12. When the nozzle body 1 is installed, the reinforcing column 16 abuts against the barrel cover 2 to achieve positioning. The outer side of the reinforcing column 16 is also provided with a plurality of evenly distributed and through-going card slots 15. The worker can drive the nozzle body 1 to rotate by using a card connecting rod to connect the card slots 15, which is simple and convenient to operate. Moreover, the card slots 15 run through both axial sides of the reinforcing column 16, making processing more convenient.

[0031] The inner end of the inner support hole 23 is connected with an annular groove 24, whose diameter is larger than the support hole; the annular groove 24 and the support hole are transitioned through an inclined surface, so that the inner support hole 23 is easily formed.

[0032] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stable nozzle for an injection molding machine, comprising a nozzle body (1), one end of which is provided with an external thread section (11), a barrel head (2) at the outlet position of a barrel cover is provided with a threaded hole (21) threadedly connected to the external thread section (11), characterized in that: The outer end of the threaded hole (21) is connected to a coaxial outer supporting hole (22); The tail end of the external thread section (11) is connected to a tail support column (12); The diameter of the tail support column (12) is greater than the diameter of the external thread section (11); The tail support column (12) is inserted into the outer support hole (22) and is tightly connected.

2. The stable nozzle for injection molding machine according to claim 1, characterized in that: The tail support column (12) is inserted into the outer support hole (22) to a depth of 2±0.2 mm.

3. The stable nozzle for injection molding machine according to claim 1, characterized in that: A transition section (13) is also connected between the tail support column (12) and the external thread section (11); The diameter of the transition section (13) is smaller than the diameter of the external thread section (11); There is an arc transition between the transition section (13) and the tail support column (12); The transition section (13) and the external thread section (11) are transitioned via an inclined surface.

4. The stable nozzle for injection molding machine according to claim 1, characterized in that: The inner end of the threaded hole (21) is connected to a coaxial inner support hole (23); The diameter of the inner support hole (23) is smaller than the diameter of the threaded hole (21); The head of the external thread section (11) is connected to a head support column (14); The head support column (14) is inserted into the inner support hole (23) and is tightly connected.

5. The stable nozzle for injection molding machine according to claim 4, characterized in that: The inner end of the inner support hole (23) is connected to an annular groove (24), the diameter of which is larger than that of the inner support hole (23); The annular groove (24) and the inner support hole (23) are transitioned through an inclined surface.

6. The stable nozzle for injection molding machine according to claim 4, characterized in that: The contact surface length between the head support column (14) and the inner support hole (23) is 3±0.5 mm.

7. The stable nozzle for injection molding machine according to claim 1, characterized in that: The outer wall of the nozzle body (1) is also provided with a plurality of evenly distributed clamping grooves (15).

8. The stable nozzle for injection molding machine according to claim 7, characterized in that: The clamping slot (15) is located outside the tail support column (12) and close to the tail support column (12).

9. The stable nozzle for injection molding machine according to claim 8, characterized in that: The outer side of the tail support column (12) is connected with a reinforcement column (16); The clamping slot (15) is arranged on the outer side of the reinforcing column (16); When the nozzle body (1) is installed, the reinforcing column (16) abuts against the barrel head (2) to achieve positioning.

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