Exhaust port structure of machine barrel of injection molding machine

Abstract

The utility model provides an exhaust port structure of a machine barrel of an injection molding machine. The exhaust port structure solves the problem that the contact area between an exhaust port of a machine barrel of an existing injection molding machine and air is large. The exhaust device is characterized by further comprising a plurality of exhaust holes which are formed in the cylinder body and arranged in an array mode. The contact area between the raw materials and air is reduced, and the degree of oxidation reaction between the raw materials and oxygen at high temperature is reduced, so that the undesirable conditions of blackening, yellowing, carbonization and the like of the raw materials are improved, and the appearance quality of products is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to an exhaust port structure of a barrel of an injection molding machine. Background Art

[0002] When an injection molding machine is operating, the plastic raw material is melted and compressed by the extrusion of the barrel and screw. The melt is then decompressed, causing the gas within the melt to expand. The bubbles then burst and separate from the melt, and the gas is then discharged through the barrel's vent. Currently, the vents on injection molding machine barrels are generally square or circular openings. For example, Chinese Patent Publication No. CN208645949U (an injection molding machine screw barrel) has this vent structure. The disadvantage of this vent is that the contact surface between air and the raw material below the vent is large, which easily causes oxidation reactions between the raw material and oxygen, resulting in undesirable conditions such as blackening, yellowing, and carbonization of the raw material, affecting the quality of the plastic product. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides an exhaust port structure of the barrel of an injection molding machine, which solves the problem that the exhaust port of the barrel of the existing injection molding machine has a large contact area with the air.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] An exhaust port structure for an injection molding machine barrel includes a barrel body and further includes:

[0006] A plurality of exhaust holes are provided on the cylinder body, and the plurality of exhaust holes are arranged in an array.

[0007] The outer wall of the cylinder is provided with a long groove, the exhaust hole is arranged on the bottom surface of the long groove, both ends of the long groove are provided with raised parts, and the top surface of the raised part is provided with a threaded hole.

[0008] The diameter of the exhaust hole is 1-3 mm.

[0009] The angle between the axial direction of the exhaust hole and the radial direction of the cylinder is greater than 0 degree and less than 90 degrees.

[0010] The angle between the axial direction of the exhaust holes in the middle row and the radial direction of the cylinder is 35 degrees.

[0011] A cooling channel is provided at the front end of the feed inlet of the cylinder, and the cooling channel is close to the feed inlet of the cylinder.

[0012] The cylinder is evenly distributed with temperature measuring holes.

[0013] The beneficial effects of the utility model are:

[0014] Reduce the contact area between raw materials and air, reduce the degree of oxidation reaction between raw materials and oxygen at high temperature, thereby improving the blackening, yellowing and carbonization of raw materials and ensuring the appearance quality of the products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the present utility model.

[0016] Figure 2 This utility model Figure 1 Enlarged schematic diagram of point C in the middle.

[0017] Figure 3 This utility model Figure 1 Schematic cross-section at point A in the middle.

[0018] Figure 4 This utility model Figure 1 Schematic cross-section at point B.

[0019] Figure 5 It is a schematic diagram of the cylinder of the utility model.

[0020] Cylinder 1, exhaust hole 2, long groove 3, protrusion 4, threaded hole 5, cooling channel 6, temperature measuring hole 7. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] In the embodiment, Figure 1 、 Figure 2 As shown, an exhaust port structure of an injection molding machine barrel includes a barrel 1 and further includes:

[0023] A plurality of exhaust holes 2 are provided on the cylinder 1 and arranged in an array. This reduces the contact surface between the raw material and the air, and reduces the degree of oxidation reaction between the raw material and oxygen at high temperature, thereby improving the blackening, yellowing, and carbonization of the raw material and ensuring the appearance quality of the finished product.

[0024] In the embodiment, Figure 1 、 Figure 2 As shown, the outer wall of the cylinder 1 is provided with a long groove 3, the exhaust hole 2 is provided on the bottom surface of the long groove 3, and a protrusion 4 is provided at both ends of the long groove 2. The top surface of the protrusion 4 is provided with a threaded hole 5. The top surface of the protrusion 4 is provided with a threaded hole 5 to facilitate connection with the exhaust equipment or other equipment and subsequent work.

[0025] In the embodiment, the diameter of the exhaust hole 2 is 1-3 mm. While ensuring exhaust, the contact area between the raw material and the air is reduced as much as possible.

[0026] In the embodiment, Figure 1 、 Figure 2 、 Figure 3 As shown, the angle between the axial direction of the exhaust holes 2 and the radial direction of the cylinder 1 is greater than 0 degrees and less than 90 degrees. The angle between the axial direction of the exhaust holes 2 in the middle row and the radial direction of the cylinder 1 is 35 degrees. The angle between the exhaust holes 2 and the cylinder 1 makes it difficult for raw materials to enter the exhaust holes 2 during transportation.

[0027] In the embodiment, Figure 1 、 Figure 4 As shown, a cooling channel 6 is provided at the front end of the feed port of the barrel 1, and the cooling channel 6 is close to the feed port of the barrel 1. The raw materials at the feed port of the barrel 1 are cooled to prevent the raw materials from being softened by heat during feeding and sticking to the surface of the screw to cause blockage, or from being too hot during forward conveyance to cause premature plasticization or carbonization.

[0028] In the embodiment, Figure 5 As shown, the cylinder 1 is evenly distributed with temperature measuring holes 7. Temperature sensors are installed in the temperature measuring holes 7 to facilitate timely understanding of the internal temperature of the cylinder 1 and make adjustments to ensure the stability of the temperature in the cylinder 1.

[0029] Obviously, the above embodiments of the present invention are merely examples for the purpose of illustrating the present invention and are not intended to limit the implementation methods of the present invention. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to provide an exhaustive list of implementation methods. However, any obvious variations or modifications arising from the essence of the present invention remain within the scope of protection of the present invention.

Claims

1. An exhaust port structure of an injection molding machine barrel, comprising a barrel (1), characterized in that: Also includes: A plurality of exhaust holes (2) are provided on the cylinder (1), and the plurality of exhaust holes (2) are arranged in an array.

2. The exhaust port structure of an injection molding machine barrel according to claim 1, characterized in that: The outer wall of the cylinder (1) is provided with a long groove (3), the exhaust hole (2) is arranged on the bottom surface of the long groove (3), both ends of the long groove (3) are provided with raised parts (4), and the top surface of the raised part (4) is provided with a threaded hole (5).

3. The exhaust port structure of the injection molding machine barrel according to claim 1, characterized in that: The diameter of the exhaust hole (2) is 1-3 mm.

4. The exhaust port structure of the barrel of an injection molding machine according to claim 1, wherein: The angle between the axial direction of the exhaust hole (2) and the radial direction of the cylinder (1) is greater than 0 degrees and less than 90 degrees.

5. The exhaust port structure of the barrel of an injection molding machine according to claim 4, characterized in that: The angle between the axial direction of the exhaust holes (2) located in the middle row and the radial direction of the cylinder (1) is 35 degrees.

6. The exhaust port structure of the barrel of an injection molding machine according to claim 1, wherein: A cooling channel (6) is provided at the front end of the feed inlet of the cylinder (1), and the cooling channel (6) is close to the feed inlet of the cylinder (1).

7. The exhaust port structure of the barrel of an injection molding machine according to claim 1, wherein: The cylinder (1) is evenly distributed with temperature measuring holes (7).

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