Injection nozzle mounting member, injection device, and injection molding machine

Abstract

The invention provides an injection nozzle mounting member capable of mounting an injection nozzle without forming a threaded hole in the end surface of the front end of a heating cylinder. In the injection nozzle mounting member (30), a through-hole (40) is opened at a shaft center, a male thread (41) is formed on an outer peripheral surface of a rear end portion, and a flange pressing portion (46) is provided at a predetermined portion. The injection nozzle (5) is attached to the injection nozzle attachment member (30) by inserting the main body section (27) into the through-hole (40). Next, a male thread (41) of the injection nozzle attachment member (30) is screwed and fastened to a female thread (45) formed at the tip of the heating cylinder (19). As a result, the flange section (28) is pressed by the flange pressing section (46), and the injection nozzle (5) is attached to the heating cylinder (19).

Description

Technical Field

[0001] The present invention relates to an injection nozzle mounting component for mounting an injection nozzle on a heating cylinder, an injection device and an injection molding machine to which the injection nozzle is mounted via the injection nozzle mounting component. Background Art

[0002] The injection device of the injection molding machine includes a heating cylinder and a screw inserted into the heating cylinder, and an injection nozzle is provided at the front end of the heating cylinder. The injection nozzle is mounted to the heating cylinder through a predetermined injection nozzle mounting component. The injection nozzle mounting component has, for example, a pressing block described in Patent Document 1, i.e., a cylinder head. The cylinder head has a through hole at the center, and the main body of the nozzle is inserted into the through hole. A flange portion with an enlarged diameter is formed at the rear end portion of the injection nozzle, and the flange portion is pressed by the cylinder head. A plurality of threaded holes are provided on the end face of the front end of the heating cylinder, and the cylinder head is fastened to the heating cylinder by a plurality of bolts threadedly connected to these threaded holes, and the nozzle is mounted to the heating cylinder.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-151745 Summary of the invention

[0006] Problems to be Solved by the Invention

[0007] When the injection nozzle mounting member is composed of a cylinder head, it is necessary to open a plurality of threaded holes on the end surface of the front end of the heating cylinder. In order to open the threaded holes, the wall thickness of the heating cylinder needs to reach a certain level, and it is difficult to open the holes. In particular, it is difficult to open the threaded holes in a machine model such as a small machine where the wall thickness of the heating cylinder is relatively thin.

[0008] In the present disclosure, an injection nozzle mounting component is provided, which can mount the injection nozzle without forming a threaded hole on the end surface of the front end of the heating cylinder.

[0009] Other objects and novel features will become apparent from the description of this specification and the accompanying drawings.

[0010] Means for solving problems

[0011] The injection nozzle includes a cylindrical main body and a flange portion with an enlarged diameter at the rear end. In the present disclosure, an injection nozzle mounting component for mounting the injection nozzle to the heating cylinder is constructed as follows. That is, the injection nozzle mounting component is provided with a through hole for inserting the main body of the injection nozzle at the center of the axis, an external thread is formed on the outer peripheral surface of the rear end, and a flange pressing portion for pressing the flange portion of the injection nozzle toward the heating cylinder is provided at a predetermined portion. The main body is inserted into the through hole and the injection nozzle is mounted relative to the injection nozzle mounting component. Then, the external thread is threadedly connected to the internal thread formed at the front end of the heating cylinder and the injection nozzle mounting component is mounted to the heating cylinder. Thereby, the flange portion is pressed by the flange pressing portion and the injection nozzle is mounted to the heating cylinder.

[0012] Effects of the Invention

[0013] The injection nozzle mounting component of the present disclosure can mount the injection nozzle to the heating cylinder without forming a threaded hole on the end surface of the front end of the heating cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view showing the injection molding machine according to the present embodiment.

[0015] Figure 2 1 is a front cross-sectional view showing a part of the injection device, the injection nozzle mounting component, and the injection nozzle according to the present embodiment.

[0016] Figure 3 It is a perspective view of the injection nozzle mounting component according to the present embodiment.

[0017] Figure 4A 1 is a front cross-sectional view showing the injection nozzle mounting member and the injection nozzle according to the present embodiment.

[0018] Figure 4B 1 is a front cross-sectional view showing the injection nozzle mounting member and the injection nozzle according to the present embodiment.

[0019] Figure 4C 1 is a front cross-sectional view showing a part of the heating cylinder, the injection nozzle mounting member, and the injection nozzle according to the present embodiment.

[0020] Figure 4D 1 is a front cross-sectional view showing a part of the heating cylinder, the injection nozzle mounting member, and the injection nozzle according to the present embodiment.

[0021] Figure 5 : is a front cross-sectional view showing a part of an injection device according to a comparative example.

[0022] Figure 6It is a front cross-sectional view showing a part of an injection device according to a modified example of the present embodiment, an injection nozzle mounting component according to the modified example, and an injection nozzle.

[0023] Description of Reference Numerals

[0024] 1 Injection molding machine 2 Mold clamping device

[0025] 3 Injection device 4 Control device

[0026] 5 Injection nozzle 7 Base

[0027] 9 Fixed plate 10 Upper movable plate

[0028] 11 Lower movable plate 12 Tie rod

[0029] 14 Toggle mechanism 15 Turntable

[0030] 17 Upper mold 18 Lower mold

[0031] 19 Heating cylinder 20 Screw

[0032] 22 Screw drive device 23 Lifting device

[0033] 25 Heater 26 Nozzle heater

[0034] 27 Main body 28 Flange

[0035] 29 Resin flow path 30 Injection nozzle mounting parts

[0036] 33 Temperature sensor 34 Groove

[0037] 35 Sensor hole

[0038] 37 cylindrical portion 38 fastening portion

[0039] 40 Through hole 41 External thread

[0040] 44 hole 45 internal thread

[0041] 46 Flange pressing part DETAILED DESCRIPTION

[0042] The specific implementation is described in detail below with reference to the accompanying drawings. However, it is not limited to the following implementation. For the purpose of clear description, the following description and the accompanying drawings are appropriately simplified. In each figure, the same elements are marked with the same reference numerals, and repeated descriptions are omitted as needed. In addition, in order to avoid confusion in the drawings, hatching is omitted in some parts.

[0043] <Injection molding machine>

[0044] like Figure 1 As shown, the injection molding machine 1 according to the present embodiment is composed of a so-called vertical injection molding machine. Figure 2 and Figure 3 The injection nozzle mounting member 30 according to the present embodiment described in detail is suitable for mounting the injection nozzle 5 in the vertical injection molding machine, but can also be mounted in a horizontal injection molding machine. That is, the type of injection molding machine is not limited. The injection molding machine 1 according to the present embodiment includes a toggle-type mold clamping device 2, an injection device 3, and a control device 4. The control device 4 is configured to control the mold clamping device 2, the injection device 3, etc.

[0045] <Mold Clamping Device>

[0046] The mold clamping device 2 is composed of a so-called vertical mold clamping device, including a fixed plate 9 fixed to a base 7, an upper movable plate 10 arranged above the fixed plate 9, and a lower movable plate 11 arranged in the base 7. The upper movable plate 10 and the lower movable plate 11 are connected by three tie rods 12, 12, ... A toggle mechanism 14 is provided between the lower movable plate 11 and the fixed plate 9, and a turntable 15 is provided on the fixed plate 9. The upper movable plate 10 is provided with an upper mold 17, and the turntable 15 is provided with a lower mold 18. When the toggle mechanism 14 is driven, the upper mold 17 and the lower mold 18 are opened and closed.

[0047] <Injection device>

[0048] The injection device 3 is disposed above the upper movable plate 10 of the mold clamping device 2. The injection device 3 includes a heating cylinder 19, a screw 20 disposed in the heating cylinder 19, a screw driving device 22, and a lifting device 23 for lifting the injection device 3 as a whole. Figure 2 As shown, the heating cylinder 19 is provided with the injection nozzle 5 according to the present embodiment, which will be described in detail below. The heating cylinder 19 is provided with heaters 25, 25, ..., and the injection nozzle 5 is provided with nozzle heaters 26, 26, ....

[0049] <Injection Nozzle>

[0050] like Figure 2 As shown in FIG. 1 , the injection nozzle 5 is composed of a long cylindrical main body 27 and a flange 28 with an enlarged diameter, and a resin flow path 29 is opened at the center of the axis. The flange 28 is formed on the rear end side of the injection nozzle 5, that is, on the side mounted on the heating cylinder 19. Figure 2As shown, the injection nozzle 5 is mounted to the heating cylinder 19 by the injection nozzle mounting member 30 according to the present embodiment, which will be described in detail below. The injection nozzle 5 is provided with temperature sensors 33, 33 and nozzle heaters 26, 26. In addition, grooves 34, 34 are formed on the outer peripheral surface of the main body 27 of the injection nozzle 5, and sensor holes 35, 35 are opened continuously with the grooves 34, 34 so as to set the temperature sensors 33, 33.

[0051] <Injection nozzle mounting parts>

[0052] like Figure 3 As shown, the injection nozzle mounting member 30 according to the present embodiment includes a cylindrical portion 37 and a hexagonal nut-shaped fastening portion 38, and a through hole 40 is opened along the axial direction. An external thread 41 is formed on the outer peripheral surface of the cylindrical portion 37. Figure 2 As shown, the heating cylinder 19 has an axial hole 44 formed at its front end, and the hole 44 is formed with an internal thread 45. The external thread 41 of the cylindrical portion 37 of the injection nozzle mounting component 30 is configured to be threadedly connected to the internal thread 45. The fastening portion 38 is configured to be used to rotate the injection nozzle mounting component 30 using a tool such as a wrench. In the injection nozzle mounting component 30 according to the present embodiment, the end surface of the rear end portion of the cylindrical portion 37 is a pressing injection nozzle 56 (see Figure 2 ) of the flange portion 28 of the flange pressing portion 46.

[0053] The method of mounting the injection nozzle 5 on the heating cylinder 19 in this embodiment will be described. Figure 4A and 4B As shown, the injection nozzle mounting member 30 is mounted to the injection nozzle 5. That is, the main body 27 of the injection nozzle 5 is inserted into the through hole 40 of the injection nozzle mounting member 30. When inserted to the bottom, the end surface of the rear end portion of the injection nozzle mounting member 30, that is, the flange pressing portion 46, contacts the flange portion 28 of the injection nozzle 5.

[0054] Next, if Figure 4C As shown, the injection nozzle mounting component 30 according to the present embodiment provided with the injection nozzle 5 is mounted to the heating cylinder 19. Specifically, the external thread 41 of the injection nozzle mounting component 30 is threadedly connected to the internal thread 45 of the hole 44 in the axial direction of the heating cylinder 19. Then, a tool such as a wrench is engaged with the fastening portion 38, and the injection nozzle mounting component 30 is rotated and fastened. In this way, the flange portion 28 is pressed by the flange pressing portion 46, and the injection nozzle 5 is mounted to the heating cylinder 19. As shown in FIG. Figure 4D As shown, temperature sensors 33, 33, nozzle heaters 26, 26, ... are mounted to the injection nozzle 5 as needed. The mounting of the injection nozzle 5 to the heating cylinder 19 is completed.

[0055] [Comparative Example]

[0056] The injection nozzle mounting member 30 according to the present embodiment can be mounted even on a heating cylinder 19 having a relatively thin wall thickness. Figure 5 The injection device 3X according to the comparative example is described in the following. The injection device 3X according to the comparative example is also provided with the injection nozzle 5 according to the present embodiment (refer to Figure 2 ) has the same structure as the injection nozzle 5. However, the injection nozzle mounting component used to mount the injection nozzle 5 is different from that of the present embodiment.

[0057] Specifically, in the injection device 3X according to the comparative example, the injection nozzle mounting component is composed of a cylinder head 50. The cylinder head 50 is configured to be fixed to the heating cylinder 19X by bolts 51, 51. Therefore, it is necessary to form threaded holes 53, 53 for threading the bolts 51, 51 on the end surface of the front end of the heating cylinder 19X. If the wall thickness of the heating cylinder 19X does not have a margin, it is difficult to open the threaded holes 53, 53. In contrast to such a comparative example, the injection nozzle mounting component 30 according to the present embodiment (see Figure 2 ) The injection nozzle 5 can be installed without opening a threaded hole in the heating cylinder 19, and there is no need to worry about the wall thickness of the heating cylinder 19.

[0058] <Modification>

[0059] The injection nozzle mounting member 30 according to the present embodiment can be modified in various ways. Figure 6 The injection nozzle 5 is mounted on the heating cylinder 19 using the injection nozzle mounting component 30A according to the modified example. In the injection nozzle mounting component 30A according to the modified example of the present embodiment, an external thread 41 is also formed on the cylindrical portion 37, which is threadedly connected to the internal thread 45 of the hole 44 in the axial direction of the heating cylinder 19.

[0060] However, the injection nozzle mounting member 30A of the modified example is different from the present embodiment (see Figure 2 and Figure 3 ) is different in that the flange pressing portion 46A presses the flange portion 28 of the injection nozzle 5. That is, in the injection nozzle mounting component 30A according to the modified example, the through hole 40 is enlarged in diameter in a stepped manner near the rear end portion, thereby forming a step portion. The step portion becomes the flange pressing portion 46A that presses the flange portion 28. The injection nozzle mounting component 30A according to such a modified example can reliably mount the injection nozzle 5 even when the hole 44 formed on the heating cylinder 19 is shallow and the length of the internal thread 45 is short.

[0061] The invention created by the present inventors has been specifically described above based on the embodiments, but the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the invention. The multiple examples described above can also be combined as appropriate for implementation.

Claims

1. An injection nozzle mounting component, characterized in that: The injection nozzle mounting component is used to mount an injection nozzle having a cylindrical main body and a flange portion with a larger diameter at the rear end to the front end of the heating cylinder. The injection nozzle mounting component is provided with a through hole for inserting the main body at the center of the axis, an external thread is formed on the outer peripheral surface of the rear end, and a flange pressing portion for pressing the flange portion toward the heating cylinder is provided at a predetermined portion. The injection nozzle is installed relative to the injection nozzle mounting component by inserting the main body into the through hole, and the injection nozzle mounting component is installed to the heating cylinder by threading the external thread to the internal thread formed at the front end of the heating cylinder, so that the flange portion is pressed by the flange pressing portion, thereby installing the injection nozzle.

2. The injection nozzle mounting component according to claim 1, characterized in that: The injection nozzle mounting member includes a fastening portion for engaging with a fastening tool to rotate the injection nozzle mounting member.

3. The injection nozzle mounting component according to claim 1 or 2, characterized in that: The flange pressing portion is an end surface of the rear end portion.

4. The injection nozzle mounting component according to claim 1 or 2, characterized in that: The through hole has a stepped diameter near an outlet, and the stepped portion having the increased diameter serves as the flange pressing portion.

5. An injection device, characterized in that: include: Heating cylinder; A screw rod placed in the heating cylinder; an injection nozzle mounted at the front end of the heating cylinder; as well as Mounting the injection nozzle to the injection nozzle mounting member of the heating cylinder, The heating cylinder has an axial hole at the front end, and the hole has an internal thread. The injection nozzle includes a cylindrical main body and a flange portion with an enlarged diameter at the rear end. The injection nozzle mounting component is provided with a through hole for inserting the main body at the center of the axis, an external thread is formed on the outer peripheral surface of the rear end, and a flange pressing portion for pressing the flange portion toward the heating cylinder is provided at a predetermined portion. The injection nozzle is mounted to the heating cylinder using the injection nozzle mounting member by inserting the main body portion into the through hole so that the flange portion is pressed by the flange pressing portion and the external thread is fastened to the internal thread.

6. The injection device according to claim 5, characterized in that The injection nozzle mounting member includes a fastening portion for engaging with a fastening tool to rotate the injection nozzle mounting member.

7. The injection device according to claim 5 or 6, characterized in that: The flange pressing portion is an end surface of the rear end portion of the injection nozzle mounting member.

8. The injection device according to claim 5 or 6, characterized in that: The through hole of the injection nozzle mounting member is enlarged in diameter in a stepped shape near an outlet, and the stepped portion where the diameter is enlarged serves as the flange pressing portion.

9. An injection molding machine, characterized in that: The invention comprises a mold clamping device for clamping the mold and an injection device for injecting the injection material, wherein the injection device comprises: Heating cylinder; A screw rod placed in the heating cylinder; an injection nozzle mounted at the front end of the heating cylinder; and Mounting the injection nozzle to the injection nozzle mounting part of the heating cylinder, The heating cylinder has an axial hole at the front end, and the hole has an internal thread. The injection nozzle includes a cylindrical main body and a flange portion with an enlarged diameter at the rear end. The injection nozzle mounting component is provided with a through hole for inserting the main body at the center of the axis, an external thread is formed on the outer peripheral surface of the rear end, and a flange pressing portion for pressing the flange portion toward the heating cylinder is provided at a predetermined portion. The injection nozzle is mounted to the heating cylinder using the injection nozzle mounting member by inserting the main body portion into the through hole so that the flange portion is pressed by the flange pressing portion and the external thread is fastened to the internal thread.

10. The injection molding machine according to claim 9, characterized in that The injection nozzle mounting member includes a fastening portion for engaging with a fastening tool to rotate the injection nozzle mounting member.

11. The injection molding machine according to claim 9 or 10, characterized in that: The flange pressing portion is an end surface of the rear end portion of the injection nozzle mounting member.

12. The injection molding machine according to claim 9 or 10, characterized in that: The through hole of the injection nozzle mounting member is enlarged in diameter in a stepped shape near an outlet, and the stepped portion where the diameter is enlarged serves as the flange pressing portion.

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