Charging barrel of injection molding machine

Abstract

The utility model discloses a charging barrel of an injection molding machine, which comprises a hollow charging barrel and a plurality of heating sleeves arranged on the outer side of the charging barrel, and exhaust holes which are through from inside to outside are formed in the side wall of the charging barrel; at least one annular protrusion protruding outwards is arranged on the outer wall of the charging barrel, and a plurality of exhaust holes are formed in the inner side of the annular protrusion in a surrounding mode. The charging barrel structure of the injection molding machine is optimally designed, so that the overflowing glue can be effectively prevented from being adhered to the heating sleeve, and the overflowing glue can be conveniently cleaned.

Description

Technical Field

[0001] The utility model relates to a barrel of an injection molding machine, in particular to the field of structural design of accessories for an injection molding machine. Background Art

[0002] When an injection molding machine is working, plastic materials are injected into the barrel of the injection molding machine. The plastic materials are pushed forward by a screw and melted by heating through a heating jacket. And the screw drives the molten rubber material to be ejected from the nozzle at the end of the barrel of the injection molding machine at a great pressure and speed, and is injected into a mold. After pressure holding and cooling, it is solidified into the required plastic product. The plastic materials that are not fully dried contain moisture. When the materials are in a molten state in the barrel, if the water vapor is not discharged in time after evaporation, it will be wrapped in the rubber material, affecting the quality of the plastic product. Some barrels of injection molding machines adapted to exhaust screws are provided with exhaust holes on the side walls, and the water vapor in the materials can be discharged through the exhaust holes. However, since a heating jacket is provided outside the barrel of the injection molding machine, it is inevitable that some rubber materials overflow through the exhaust holes during exhaust, and the overflowed rubber materials are likely to adhere to the heating jacket, resulting in great difficulty in cleaning the overflowed rubber. Summary of the Utility Model

[0003] In view of this, the utility model aims to provide a barrel of an injection molding machine that is conducive to cleaning the overflowed rubber.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] The utility model provides a barrel of an injection molding machine, which includes a hollow barrel and a plurality of heating jackets arranged outside the barrel. An exhaust hole that penetrates through the inside and outside is provided on the side wall of the barrel; at least one annular protrusion that protrudes outward is provided on the outer wall of the barrel, and a plurality of the exhaust holes are surrounded and arranged inside the annular protrusion.

[0006] In some embodiments, the outer end edge of the annular protrusion protrudes from the outer surface of the heating jacket.

[0007] In some embodiments, when there are two or more annular protrusions, they are arranged at intervals along the axial direction of the barrel.

[0008] In some embodiments, the heating jacket is wrapped outside the barrel, and both ends of the heating jacket at the part close to the annular protrusion are connected to the annular protrusion.

[0009] In some embodiments, the heating jacket is fixedly connected to the annular protrusion by a locking bolt, a rivet or welding.

[0010] In some embodiments, both ends of the heating jacket are connected by a fastening bolt, and a positioning through hole for the fastening bolt to pass through is provided on the annular protrusion.

[0011] In some embodiments, a groove portion that is recessed inwardly is provided inside the annular protrusion on the outer wall of the barrel, and the exhaust hole is provided on the inner bottom surface of the groove portion.

[0012] In some embodiments, the outer port of the exhaust hole is larger than the inner port, and the inner port diameter of the exhaust hole is less than 1 mm.

[0013] The utility model has the positive effect that the structure of the barrel of the injection molding machine is optimized in the utility model. In actual use, a barrier is formed between the exhaust hole and the heating sleeve by the annular protrusion, and the rubber material overflowing through the exhaust hole flows out through the annular protrusion without adhering to the heating sleeve outside the barrel of the injection molding machine, making it more convenient to clean the overflowed rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a three-dimensional diagram of the first injection molding machine barrel in the utility model;

[0016] Figure 2 for Figure 1 A front view of the barrel of the injection molding machine shown in ;

[0017] Figure 3 For along Figure 2 Sectional view when cutting along the AA line;

[0018] Figure 4 for Figure 3 Magnified view at B in the middle;

[0019] Figure 5 It is a cross-sectional view of the second injection molding machine barrel in the utility model when it is cut along the AA line;

[0020] Figure 6 for Figure 5 Enlarged view at center C;

[0021] Figure 7 It is a schematic structural diagram of a third type of injection molding machine barrel in the utility model.

[0022] Reference numerals shown in the figure: 1-barrel; 10-groove; 11-exhaust hole; 12-annular protrusion; 13-fastening bolt; 14-locking bolt; 2-heating jacket. DETAILED DESCRIPTION

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0026] The structure of the injection molding machine barrel provided in the embodiments of the present utility model is as Figures 1 to 7 shown, including a hollow barrel 1 and a plurality of heating sleeves 2 provided on the outer side of the barrel 1. An exhaust hole 11 that penetrates inside and outside is provided on the side wall of the barrel 1 to facilitate the discharge of gas in the rubber material; at least one annular protrusion 12 protruding outward is provided on the outer wall of the barrel 1, and a plurality of the exhaust holes 11 are surrounded and arranged inside the annular protrusion 12. In this way, a partition is formed between the exhaust hole 11 and the heating sleeve 2 through the annular protrusion 12, and the rubber material overflowing through the exhaust hole 11 flows out through the inside of the annular protrusion 12 without adhering to the heating sleeve 2 outside the injection molding machine barrel, making it more convenient to clean the overflowing glue. When the injection molding machine barrel is installed and used, the outer port of the annular protrusion 12 is downward to facilitate the discharge of the overflowing glue.

[0027] In some embodiments, the outer edge of the outer end of the annular protrusion 12 protrudes from the outer surface of the heating sleeve 2 to ensure the partition and protection effect of the annular protrusion 12, so that the rubber material overflowing from the exhaust hole 11 will not adhere to the heating sleeve 2.

[0028] In this embodiment, there is one annular protrusion 12, and the annular protrusion 12 is arranged as a strip-shaped ring extending along the axial direction of the barrel 1. In actual operation, the annular protrusion 12 can also be arranged as a circular ring or a square ring. As a variant implementation, the number of the annular protrusions 12 can also be set to two or more, and two or more annular protrusions 12 are arranged at intervals along the axial direction of the barrel 1.

[0029] The heating sleeve 2 is wrapped outside the barrel 1, and both ends of the heating sleeve 2 at the part close to the annular protrusion 12 are connected to the annular protrusion 12, ensuring that the heating sleeve 2 can be effectively fixed outside the barrel 1.

[0030] Specifically, as Figure 7 shown, the heating sleeve 2 is fixedly connected to the annular protrusion 12 through a locking bolt 14. As a variant, the heating sleeve 2 is fixedly connected to the annular protrusion 12 by riveting or welding; or as Figures 1 to 3 shown, both ends of the heating sleeve 2 are connected by a fastening bolt 13, and the annular protrusion 12 is provided with a positioning perforation for the fastening bolt 13 to pass through.

[0031] In some embodiments, as Figure 5 and Figure 6 shown, a groove portion 10 is formed by inward depression on the outer wall of the barrel 1 inside the annular protrusion 12, and the exhaust hole 11 is arranged on the inner bottom surface of the groove portion 10. By providing the groove portion 10, the side wall of the corresponding part of the barrel 1 is reduced, so that gas can quickly pass through the exhaust hole. At the same time, shortening the length of the exhaust hole can also prevent the rubber material from being blocked in the exhaust hole 11, and it is also convenient to dredge the exhaust hole 11 when it is blocked.

[0032] In some embodiments, in order to facilitate the outflow of the rubber material entering the exhaust hole 11, the outer port of the exhaust hole 11 is made larger than the inner port, and in order to prevent too much rubber material from overflowing through the exhaust hole 11 while having the exhaust function, the inner port diameter of the exhaust hole 11 is optimized, and the inner port diameter of the exhaust hole 11 is set to be less than 1 mm (such as set to 0.4 mm, 0.6 mm, 0.8 mm, 1 mm).

[0033] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An injection molding machine barrel, comprising a hollow barrel (1) and a plurality of heating sleeves (2) arranged outside the barrel (1), wherein a vent hole (11) is provided on the side wall of the barrel (1) and is connected to the inside and outside; characterized in that: At least one annular protrusion (12) protruding outward is provided on the outer wall of the barrel (1), and a plurality of exhaust holes (11) are arranged and surrounded on the inner side of the annular protrusion (12).

2. The injection molding machine barrel according to claim 1, characterized in that: The outer end edge of the annular protrusion (12) protrudes from the outer surface of the heating sleeve (2).

3. The injection molding machine barrel according to claim 1, characterized in that: When there are two or more annular protrusions (12), they are spaced apart along the axial direction of the barrel (1).

4. The injection molding machine barrel according to claim 1, characterized in that: The heating sleeve (2) is wrapped around the outside of the barrel (1), and both ends of the heating sleeve (2) near the annular protrusion (12) are connected to the annular protrusion (12).

5. The injection molding machine barrel according to claim 4, characterized in that: The heating sleeve (2) is fixedly connected to the annular protrusion (12) by means of locking bolts (14) or rivets or welding.

6. The injection molding machine barrel according to claim 4, characterized in that: The two ends of the heating sleeve (2) are connected by a fastening bolt (13), and the annular protrusion (12) is provided with a positioning through hole for the fastening bolt (13) to pass through.

7. The injection molding machine barrel according to claim 1, characterized in that: A groove (10) which is recessed inwards is provided on the outer wall of the barrel (1) inside the annular protrusion (12), and the exhaust hole (11) is provided on the inner bottom surface of the groove (10).

8. The injection molding machine barrel according to any one of claims 1 to 7, characterized in that: The outer port of the exhaust hole (11) is larger than the inner port, and the inner port diameter of the exhaust hole (11) is less than 1 mm.

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