A material tube assembly

Abstract

The utility model discloses a material pipe assembly, including material pipe and screw rod, installation flange, material pipe has the feed passageway, and the left and right ends of feed passageway respectively through material pipe and form has corresponding discharge gate, screw rod inlet, the left end of screw rod inserts into the feed passageway from screw rod inlet, and the right end of screw rod stretches out material pipe's right end outside, the outer peripheral side wall of material pipe's left end, the outer peripheral side wall of right end forms has first external thread, second external thread, and installation flange includes front flange and rear flange, front flange is connected on first external thread through first internal thread hole screw, and rear flange is connected on second external thread through second internal thread hole screw, and the junction between the left and right sides of front flange and the outer peripheral side wall of material pipe, the junction between the left and right sides of rear flane and the outer peripheral side wall of material pipe all are connected through welding, by this, it has guaranteed the connection firmness and sealing between flange and material pipe, and has guaranteed the connection stability of material pipe whole and external structure.

Description

Technical Field

[0001] This utility model relates to the field of material tube technology, and in particular to a material tube assembly. Background Technology

[0002] In the existing technology, injection molding machines usually use a material tube to inject raw materials. Therefore, the material tube plays an important role in the injection molding process. As a result, the overall performance of the material tube affects the injection molding effect of the injection molding machine. People design the material tube according to different usage environment requirements.

[0003] Existing feed pipes typically include a feed pipe body and a connecting flange. The feed pipe body has feed channels extending through its interior on both sides. The feed channels form a discharge port and a screw inlet at the left and right ends of the feed pipe body, respectively. The connecting flange is located on the outer peripheral wall of the right end of the feed pipe body and is threaded onto the outer peripheral wall of the right end of the feed pipe body. Although this method can achieve the connection between the connecting flange and the feed pipe body, it is difficult to ensure the connection strength and sealing between the connecting flange and the feed pipe body because the connection between the connecting flange and the feed pipe body is only threaded. Furthermore, with only one connecting flange, it is difficult to guarantee the connection stability between the feed pipe as a whole and the external structure.

[0004] Therefore, a new technology needs to be developed to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a material pipe assembly that ensures the firmness and sealing of the connection between the flange and the material pipe, and also ensures the stability of the connection between the material pipe as a whole and the external structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A feed tube assembly includes a feed tube and a screw and a mounting flange mounted on the feed tube; the feed tube has a feed channel, and the left and right ends of the feed channel respectively pass through the feed tube and form corresponding discharge ports and screw inlets;

[0008] The left end of the screw is inserted into the feed channel from the screw inlet, and the left end of the screw extends to the right inner side of the discharge port; the right end of the screw extends out of the right end of the feed tube; the outer peripheral sidewalls of the left and right ends of the feed tube are respectively formed with a first external thread and a second external thread; the mounting flange includes a front flange and a rear flange; the front flange is threaded to the first external thread through a first internal thread hole, and the rear flange is threaded to the second external thread through a second internal thread hole; the connections between the left and right sides of the front flange and the outer peripheral sidewalls of the feed tube, and the connections between the left and right sides of the rear flange and the outer peripheral sidewalls of the feed tube are all welded; the right end of the screw is provided with an assembly section, a connecting section, and a connecting segment from right to left; the outer peripheral sidewall of the assembly section is recessed with a keyway that extends axially; the outer peripheral sidewall of the connecting segment is provided with a third external thread.

[0009] As a preferred embodiment, a fourth external thread is provided on the outer peripheral sidewall of the material tube between the first external thread and the second external thread.

[0010] As a preferred embodiment, a first annular limiting step and a second annular limiting step are sequentially provided on the outer peripheral sidewall of the left end of the material pipe from left to right on the right side of the first external thread. The outer diameter of the second annular limiting step is larger than the outer diameter of the first annular limiting step. The right end of the internal thread of the first internal thread hole of the front flange is restricted by the left end face of the first annular limiting step, and the right end face of the front flange is restricted by the left end face of the second annular limiting step. The connection between the right end face of the front flange and the outer peripheral sidewall of the second annular limiting step is achieved by welding.

[0011] As a preferred embodiment, the inner circumferential sidewall of the left opening of the first internal threaded hole of the front flange is formed with a first chamfer that gradually decreases from left to right, and the outer edge of the left end face of the material pipe is formed with a second chamfer that gradually increases from left to right. The first chamfer and the second chamfer are correspondingly arranged and are connected by welding.

[0012] As a preferred embodiment, a third annular limiting step and a fourth annular limiting step are sequentially provided on the outer peripheral sidewall of the right end of the material pipe from right to left on the left side of the second external thread. The outer diameter of the fourth annular limiting step is larger than the outer diameter of the third annular limiting step. The left end of the internal thread of the second internal thread hole of the rear flange is restricted by the right end face of the third annular limiting step, and the left end face of the rear flange is restricted by the right end face of the fourth annular limiting step. The connection between the left end face of the rear flange and the outer peripheral sidewall of the fourth annular limiting step is achieved by welding.

[0013] As a preferred embodiment, the inner circumferential sidewall of the right opening of the second internal threaded hole of the rear flange is formed with a third chamfer that gradually decreases from right to left, and the outer edge of the right end face of the material pipe is formed with a fourth chamfer that gradually increases from right to left. The third chamfer and the fourth chamfer are correspondingly arranged and are connected by welding.

[0014] As a preferred embodiment, the front flange has two connecting protrusions on both its upper and lower sides, which are spaced apart by a gap groove. The two connecting protrusions on the upper side each have a first connecting hole that penetrates both sides of the connecting protrusion. The two connecting protrusions on the lower side each have an arc-shaped groove that penetrates both sides of the connecting protrusion on their right side. The lower right side of the front wall of the front flange, near the connecting protrusion, has a first connecting blind hole. The middle of the rear wall of the front flange has a second connecting blind hole.

[0015] As a preferred embodiment, the rear flange has a cuboid structure, and a plurality of second connecting holes are provided around the second internal thread hole. The second connecting holes penetrate the left and right sides of the rear flange, and the plurality of second connecting holes are arranged in a centrally symmetrical manner around the axis of the second internal thread hole.

[0016] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly involves forming a first external thread and a second external thread on the outer peripheral sidewall of the left end and the outer peripheral sidewall of the right end of the material pipe, respectively, so that the mounting flange includes a front flange and a rear flange. The front flange is threaded to the first external thread through the first internal thread hole, and the rear flange is threaded to the second external thread through the second internal thread hole. Furthermore, the connection points between the left and right sides of the front flange and the outer peripheral sidewall of the material pipe, and the connection points between the left and right sides of the rear flange and the outer peripheral sidewall of the material pipe, are all welded together. In this way, the flange and the material pipe can be reinforced and sealed by welding after the threaded connection. This ensures the connection between the flange and the material pipe is firm and airtight. Moreover, by setting the front flange and the rear flange at the left and right ends of the material pipe respectively, both ends of the material pipe can be connected to the external structure through the flange, thereby ensuring the overall connection stability between the material pipe and the external structure.

[0017] To more clearly illustrate the structural features, technical means, and specific objectives and functions of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the overall structure of an embodiment of this utility model;

[0019] Figure 2 This is a front view of the feed tube according to an embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Schematic diagram of the cross section in the FF direction;

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0023] Figure 6 This is a schematic diagram of the screw structure according to an embodiment of the present utility model;

[0024] Figure 7 This is a left view of the front flange of an embodiment of this utility model;

[0025] Figure 8 This is a front view of the front flange of an embodiment of the present utility model;

[0026] Figure 9 This is a cross-sectional schematic diagram of the front flange according to an embodiment of the present utility model;

[0027] Figure 10 This is a right view of the rear flange of an embodiment of the present utility model;

[0028] Figure 11 This is a cross-sectional schematic diagram of the rear flange according to an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached diagram:

[0030] 10. Material pipe 11. Feed channel

[0031] 12. Discharge port 13. Screw inlet

[0032] 14. First annular limiting step 15. Second annular limiting step

[0033] 16. Third ring-shaped limiting step 17. Fourth ring-shaped limiting step

[0034] 18. Fourth external thread; 20. Screw.

[0035] 21. Assembly section; 22. Connecting section

[0036] 23. Connecting section 24. Keyway

[0037] 25. Third external thread 26. Thread

[0038] 30. Front flange; 31. First internal threaded hole

[0039] 32. First chamfer 33. Connecting protrusion

[0040] 34. Spacing groove; 35. First connecting hole

[0041] 36. Arc-shaped groove; 37. First connecting blind hole

[0042] 38. Second connecting blind hole; 40. Rear flange

[0043] 41. Second internal threaded hole; 42. Third chamfer.

[0044] 43. Second connecting hole. Detailed Implementation

[0045] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", and "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model.

[0046] Please refer to Figures 1 to 11 As shown, it illustrates the specific structure of the feed tube assembly provided in an embodiment of the present invention.

[0047] The feed tube assembly includes a feed tube 10, a screw 20 mounted on the feed tube 10, and a mounting flange. The feed tube 10 has a feed channel 11, the left and right ends of which respectively pass through the feed tube 10 and form corresponding discharge ports 12 and screw 20 inlets 13. The left end of the screw 20 is inserted into the feed channel 11 from the screw 20 inlet 13, and the left end of the screw 20 extends into the right inner side of the discharge port 12. The right end of the screw 20 extends out of the right end of the feed tube 10.

[0048] The outer peripheral wall of the left end and the outer peripheral wall of the right end of the material pipe 10 are respectively formed with a first external thread and a second external thread. The mounting flange includes a front flange 30 and a rear flange 40. The front flange 30 is threaded to the first external thread through a first internal thread hole 31, and the rear flange 40 is threaded to the second external thread through a second internal thread hole 41. The connection between the left and right sides of the front flange 30 and the outer peripheral wall of the material pipe 10, and the connection between the left and right sides of the rear flange 40 and the outer peripheral wall of the material pipe 10, are all welded together. In this way, the flange and the material pipe 10 can be reinforced and sealed by welding after the threaded connection. This ensures the connection between the flange and the material pipe 10 is firm and airtight. Furthermore, by setting the front flange 30 and the rear flange 40 at the left and right ends of the material pipe 10 respectively, both ends of the material pipe 10 can be connected to the external structure through the flange, thereby ensuring the overall connection stability between the material pipe 10 and the external structure.

[0049] The right end of the screw 20 is provided with an assembly section 21, a connecting section 22, and a connecting section 23 from right to left. The outer peripheral sidewall of the assembly section 21 has a keyway 24 recessed therein, extending axially to facilitate connection and installation with external structures. The outer peripheral sidewall of the connecting section 23 has a third external thread 25 for easy connection and installation with external structures. In this embodiment, the connecting section 22 is a frustum-shaped section that gradually increases in size from right to left. The maximum outer diameter of the connecting section 22 is equal to the outer diameter of the connecting section 23, and the minimum outer diameter of the connecting section 22 is equal to the outer diameter of the assembly section 21. The outer peripheral sidewall of the screw 20 has a thread 26, the right end of which extends to the left side of the connecting section 23. The third external thread 25 is formed on the side of the connecting section 23 near the thread 26.

[0050] The inner circumferential sidewall of the left opening of the first internal threaded hole 31 of the front flange 30 has a first chamfer 32 that gradually decreases from left to right, and the outer edge of the left end face of the material tube 10 has a second chamfer that gradually increases from left to right. The first chamfer 32 and the second chamfer are correspondingly arranged, and the first chamfer 32 and the second chamfer are connected by welding. In this way, the first chamfer 32 and the second chamfer can jointly form a welding space, which is more conducive to welding.

[0051] The inner circumferential sidewall of the opening on the right side of the second internal threaded hole 41 of the rear flange 40 is formed with a third chamfer 42 that gradually decreases from right to left, and the outer edge of the right end face of the material tube 10 is formed with a fourth chamfer that gradually increases from right to left. The third chamfer 42 and the fourth chamfer are correspondingly arranged and are connected by welding. In this way, the third chamfer 42 and the fourth chamfer can jointly form a welding space, which is more conducive to welding.

[0052] On the outer peripheral wall of the left end of the feed tube 10, from left to right, a first annular limiting step 14 and a second annular limiting step 15 are sequentially provided. The outer diameter of the second annular limiting step 15 is larger than the outer diameter of the first annular limiting step 14. The right end of the internal thread of the first internal thread hole 31 of the front flange 30 is restricted by the left end face of the first annular limiting step 14, and the right end face of the front flange 30 is restricted by the left end face of the second annular limiting step 15. Thus, the combined design of the first annular limiting step 14 and the second annular limiting step 15 together restricts the screwing depth of the front flange 30 on the feed tube 10, ensuring that the front flange 30 is screwed in properly without over-screwing. Furthermore, the connection between the right end face of the front flange 30 and the outer peripheral wall of the second annular limiting step 15 is welded for reinforcement and sealing.

[0053] On the outer peripheral wall of the right end of the feed tube 10, from right to left on the left side of the second external thread, a third annular limiting step 16 and a fourth annular limiting step 17 are sequentially provided. The outer diameter of the fourth annular limiting step 17 is larger than the outer diameter of the third annular limiting step 16. The left end of the internal thread of the second internal thread hole 41 of the rear flange 40 is restricted by the right end face of the third annular limiting step 16, and the left end face of the rear flange 40 is restricted by the right end face of the fourth annular limiting step 17. Thus, the combined design of the third annular limiting step 16 and the fourth annular limiting step 17 can jointly limit the screwing depth of the rear flange 40 on the feed tube 10, ensuring that the rear flange 40 is screwed in properly without over-screwing. Furthermore, the connection between the left end face of the rear flange 40 and the outer peripheral wall of the fourth annular limiting step 17 is welded for reinforcement and sealing.

[0054] A fourth external thread 18 is provided on the outer peripheral sidewall of the material tube 10 between the first external thread and the second external thread. Specifically, the fourth external thread 18 is formed between the second annular limiting step 15 and the fourth annular limiting step 17.

[0055] The front flange 30 has two connecting protrusions 33 on both its upper and lower sides. The two connecting protrusions 33 are spaced apart by a spacer groove 34. The two connecting protrusions 33 on the upper side each have a first connecting hole 35 that penetrates the front and rear sides of the connecting protrusion 33. The two connecting protrusions 33 on the lower side each have an arc-shaped groove 36 that penetrates the front and rear sides of the connecting protrusion 33. The lower right side of the front wall of the front flange 30 near the connecting protrusion 33 has a first connecting blind hole 37. The middle part of the rear wall of the front flange 30 has a second connecting blind hole 38. Here, the combined design of the connecting protrusions 33, the first connecting hole 35, the arc-shaped groove 36, the first connecting blind hole 37, and the second connecting blind hole 38 makes it easy to assemble and position.

[0056] The rear flange 40 has a cuboid structure. The rear flange 40 has a plurality of second connecting holes 43 around the second internal thread hole 41. The second connecting holes 43 penetrate the left and right sides of the rear flange 40. The plurality of second connecting holes 43 are arranged in a centrally symmetrical manner around the axis of the second internal thread hole 41.

[0057] In summary, the key design feature of this utility model lies in the fact that a first external thread and a second external thread are formed on the outer peripheral sidewalls of the left and right ends of the material pipe, respectively, so that the mounting flange includes a front flange and a rear flange. The front flange is threaded to the first external thread through the first internal thread hole, and the rear flange is threaded to the second external thread through the second internal thread hole. Furthermore, the connections between the left and right sides of the front flange and the outer peripheral sidewall of the material pipe, as well as the connections between the left and right sides of the rear flange and the outer peripheral sidewall of the material pipe, are all welded together. This allows the flange and the material pipe to be reinforced and sealed by welding after the threaded connection, thus ensuring the connection strength and sealing between the flange and the material pipe. Moreover, by setting the front flange and the rear flange at the left and right ends of the material pipe respectively, both ends of the material pipe can be connected to the external structure through the flange, thereby ensuring the overall connection stability between the material pipe and the external structure.

[0058] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A feed tube assembly, comprising a feed tube and a screw and a mounting flange mounted on the feed tube; the feed tube has a feed channel, the left and right ends of which respectively penetrate the feed tube and form corresponding discharge ports and screw inlets; characterized in that: The left end of the screw is inserted into the feed channel from the screw inlet, and the left end of the screw extends to the right inner side of the discharge port; the right end of the screw extends out of the right end of the feed tube; the outer peripheral sidewalls of the left and right ends of the feed tube are respectively formed with a first external thread and a second external thread; the mounting flange includes a front flange and a rear flange; the front flange is threaded to the first external thread through a first internal thread hole, and the rear flange is threaded to the second external thread through a second internal thread hole; the connections between the left and right sides of the front flange and the outer peripheral sidewalls of the feed tube, and the connections between the left and right sides of the rear flange and the outer peripheral sidewalls of the feed tube are all welded; the right end of the screw is provided with an assembly section, a connecting section, and a connecting segment from right to left; the outer peripheral sidewall of the assembly section is recessed with a keyway that extends axially; the outer peripheral sidewall of the connecting segment is provided with a third external thread.

2. The feed tube assembly according to claim 1, characterized in that: A fourth external thread is provided on the outer peripheral sidewall of the material tube between the first external thread and the second external thread.

3. A feed tube assembly according to claim 1, characterized in that: On the outer peripheral sidewall of the left end of the material pipe, a first annular limiting step and a second annular limiting step are sequentially provided from left to right on the right side of the first external thread. The outer diameter of the second annular limiting step is larger than the outer diameter of the first annular limiting step. The right end of the internal thread of the first internal thread hole of the front flange is restricted by the left end face of the first annular limiting step, and the right end face of the front flange is restricted by the left end face of the second annular limiting step. The connection between the right end face of the front flange and the outer peripheral sidewall of the second annular limiting step is achieved by welding.

4. A feed tube assembly according to claim 1, characterized in that: The inner circumferential sidewall of the left opening of the first internal threaded hole of the front flange has a first chamfer that gradually decreases from left to right, and the outer edge of the left end face of the material tube has a second chamfer that gradually increases from left to right. The first chamfer and the second chamfer are correspondingly arranged and are connected by welding.

5. A feed tube assembly according to claim 1, characterized in that: On the outer peripheral sidewall of the right end of the material pipe, a third annular limiting step and a fourth annular limiting step are sequentially provided from right to left on the left side of the second external thread. The outer diameter of the fourth annular limiting step is larger than the outer diameter of the third annular limiting step. The left end of the internal thread of the second internal thread hole of the rear flange is restricted by the right end face of the third annular limiting step, and the left end face of the rear flange is restricted by the right end face of the fourth annular limiting step. The connection between the left end face of the rear flange and the outer peripheral sidewall of the fourth annular limiting step is achieved by welding.

6. A feed tube assembly according to claim 1, characterized in that: The inner circumferential sidewall of the right opening of the second internal threaded hole of the rear flange has a third chamfer that gradually decreases from right to left, and the outer edge of the right end face of the material pipe has a fourth chamfer that gradually increases from right to left. The third chamfer and the fourth chamfer are correspondingly arranged and are connected by welding.

7. A feed tube assembly according to claim 1, characterized in that: The front flange has two connecting protrusions on both its upper and lower sides. The two connecting protrusions are spaced apart by a gap groove. The two connecting protrusions on the upper side each have a first connecting hole that penetrates the front and rear sides of the connecting protrusion. The two connecting protrusions on the lower side each have an arc-shaped groove that penetrates the front and rear sides of the connecting protrusion on their right side. The lower right side of the front wall of the front flange, near the connecting protrusion, has a first connecting blind hole. The middle of the rear wall of the front flange has a second connecting blind hole.

8. A feed tube assembly according to claim 1, characterized in that: The rear flange has a cuboid structure. The rear flange has several second connecting holes around the second internal thread hole. The second connecting holes penetrate the left and right sides of the rear flange. The several second connecting holes are arranged symmetrically around the axis of the second internal thread hole.

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