Straight rod type ejection mechanism for mold

Abstract

The utility model discloses a straight rod type ejection mechanism for a mold, which comprises an upper mold plate and a lower mold plate, an inclined ejection piece is arranged between the upper mold plate and the lower mold plate, an injection molding cavity is defined by the upper mold plate, the lower mold plate and the inclined ejection piece, the straight rod type ejection mechanism further comprises a straight ejection rod penetrating through the lower mold plate, and the inclined ejection piece is in sliding connection with the top end of the straight ejection rod. A guide seat is fixedly arranged at the lower mold plate, an inclined slide way inclined towards the lower mold plate is arranged on the guide seat, and one side of the inclined ejection piece is in sliding connection with the inclined slide way of the guide seat. By adopting the structural design that the straight ejector rod is combined with the guide seat, the distance between the lower mold plate and the ejection limiting column is greatly reduced under the condition that the same moving stroke of the inclined ejection piece is achieved, the mold can be effectively prevented from being too thick, an injection molding machine does not need to be enlarged, and the production cost is reduced. And as the downward movement displacement of the lower mold plate is reduced, the mold opening time is remarkably shortened, the demolding time of an injection product is shortened, and the injection molding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a straight rod type ejection mechanism for molds. Background Art

[0002] For injection molded products with complex structures, the molding usually requires more than just the upper and lower mold plates. It also requires the combination of inclined ejectors and other components to form the cavity. Figure 2 As shown, the inclined ejector 30 is currently driven mainly by the swing of the inclined ejector rod 60. When the mold is opened, the upper mold plate 10 and the lower mold plate 20 are separated, and the downward moving lower mold plate 20 drives the inclined ejector rod 60 to swing clockwise, thereby driving the inclined ejector 30 to move right, so that the injection molded product is in a state that can be ejected.

[0003] The larger the tilt angle α of the lift rod 60, the longer the lift member 30 moves when the lower mold plate 20 moves downward by the same amount. However, due to the limitation of the width of the injection molding machine, the tilt angle α of the lift rod 60 can usually only reach a maximum of 12 degrees. Therefore, if you want to extend the movement of the lift member 30 when the tilt angle α of the lift rod 60 is limited, you can only increase the spacing H between the lower mold plate 20 and the ejection limit column 61. However, increasing the spacing H will cause the mold thickness to be too thick, which requires a corresponding increase in the injection molding machine, resulting in higher injection molding costs. In addition, excessive downward displacement of the lower mold plate 20 will also lead to a long mold opening time, increasing the demolding time of the injection molded product and reducing injection molding efficiency. To this end, we propose a straight rod ejection mechanism for the mold. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a straight rod type ejection mechanism for a mold.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a straight rod type ejection mechanism for a mold, comprising an upper template and a lower template, a slanted ejector piece is provided between the upper template and the lower template, the upper template, the lower template and the slanted ejector piece together form an injection cavity, and also comprising a straight ejector rod passing through the lower template, the slanted ejector piece is slidably connected to the top end of the straight ejector rod, a guide seat is fixedly provided at the lower template, the guide seat is provided with an inclined slide inclined toward the lower template, one side of the slanted ejector piece is slidably connected to the inclined slide of the guide seat, and when the lower template moves downward, the guide seat is driven to move downward synchronously, and the slanted ejector piece at the top end of the straight ejector rod slides to the right along the guide seat.

[0006] To further elaborate, the inclined ejector member is provided with a transverse sliding groove, and the upper end of the straight ejector rod is slidably connected to the transverse sliding groove of the inclined ejector member.

[0007] It is further explained that the inclination β of the inclined slideway of the guide seat is in the range of 8°-20°.

[0008] It is further explained that the inclined lift member is fixedly provided with a sliding friction block at the sliding contact point with the guide seat, one side of the sliding friction block is fixedly installed on the inclined lift member, and the other side of the sliding friction block is slidingly connected to the inclined slide of the guide seat.

[0009] It is further explained that a face needle plate is spaced apart below the lower template, and an ejection limit column is provided on the face needle plate.

[0010] The beneficial effects of the present invention are as follows: the present invention adopts a structural design that combines a straight ejector rod with a guide seat. When the same moving stroke of the inclined ejector is achieved, the distance between the lower template and the ejection limit column of the present invention is greatly reduced, which can effectively avoid causing the mold thickness to be too thick, and there is no need to increase the injection molding machine. In addition, due to the reduction in the downward displacement of the lower template, the mold opening time is significantly shortened, the demoulding time of the injection molded product is reduced, and the injection molding efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural sectional view of the present utility model.

[0012] Figure 2 This is a structural cross-sectional view of an existing mold using an inclined ejector.

[0013] Figure numbers: 10, upper template; 20, lower template; 30, inclined ejector; 31, transverse sliding groove; 32, sliding friction block; 40, straight ejector; 50, guide seat; 51, inclined slide; 60, face needle plate; 61, ejection limit column; 60, inclined ejector. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings.

[0015] Combined with attachment Figure 1 As shown, a straight rod type ejection mechanism for a mold includes an upper template 10 and a lower template 20. A tilted ejector 30 is provided between the upper template 10 and the lower template 20. The upper template 10, the lower template 20, and the tilted ejector 30 together form an injection cavity. The straight rod type ejection mechanism also includes a straight ejector rod 40 passing through the lower template 20. The straight ejector rod 40 is specifically in the shape of a straight rod. A through hole that can be passed by the straight ejector rod 40 is opened at the lower template 20. The tilted ejector rod 30 is slidably connected to the top end of the straight ejector rod 40. The lower template 20 can move vertically downward along the straight ejector rod 40. A guide seat 50 is fixedly provided at the lower template 20. The guide seat 50 is provided with an inclined slide 51 inclined toward the lower template 20. The inclination β of the inclined slide 51 of the guide seat 50 is in the range of 8°-20°.

[0016] Combined with attachment Figure 1 As shown, the inclined ejector 30 is provided with a transverse sliding groove 31, and the upper end of the straight ejector rod 40 is slidably connected to the transverse sliding groove 31 of the inclined ejector 30. One side of the inclined ejector 30 is slidably connected to the inclined slide 51 of the guide seat 50. The inclined ejector 30 is fixedly provided with a sliding friction block 32 at the sliding contact point with the guide seat 50. One side of the sliding friction block 32 is fixedly mounted on the inclined ejector 30, and the other side of the sliding friction block 32 is slidably connected to the inclined slide 51 of the guide seat 50.

[0017] As attached Figure 1 As shown, a face needle plate 60 is provided below the lower template 20, and an ejection limit column 61 is provided at the face needle plate 60. The distance between the ejection limit column 61 and the lower template 20 is D. Figure 2 As shown, for the same moving stroke of the inclined ejector 30, the existing mold using the inclined ejector rod needs to significantly increase the distance H between the lower template 20 and the ejection limit column 61 in order to achieve the lateral sliding of the inclined ejector 30 under the relatively small swing of the inclined ejector rod 60.

[0018] The present invention adopts a structural design that combines a straight ejector rod 40 with a guide seat 50. When the straight ejector rod 40 of the lower template 20 moves downward, the guide seat 50 moves downward synchronously with the lower template 20. At this time, the inclined ejector 30 slides to the right along the inclined slide 51 of the guide seat 50; at the same time, the inclined ejector 30 moves along the transverse sliding groove 31 of the inclined ejector 30, thereby ensuring that the inclined ejector 30 moves horizontally to the right when the mold is opened. Compared with the prior art, when the inclined ejector 30 has the same movement stroke, the spacing between the lower template 20 and the ejection limit column 61 of the present invention is greatly reduced, which can effectively avoid causing the mold thickness to be too thick, without the need to increase the injection molding machine. In addition, due to the reduction in the downward displacement of the lower template 20, the mold opening time is significantly shortened, reducing the demolding time of the injection molded product and improving the injection molding efficiency.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0020] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A straight-rod ejection mechanism for a mold, comprising an upper mold plate (10) and a lower mold plate (20), wherein an inclined ejector (30) is provided between the upper mold plate (10) and the lower mold plate (20), and the upper mold plate (10), the lower mold plate (20), and the inclined ejector (30) together form an injection mold cavity, characterized in that: The invention also includes a straight push rod (40) passing through the lower template (20), the inclined push piece (30) is slidably connected to the top end of the straight push rod (40), a guide seat (50) is fixedly provided at the lower template (20), and the guide seat (50) is provided with an inclined slideway (51) inclined toward the lower template (20), one side of the inclined push piece (30) is slidably connected to the inclined slideway (51) of the guide seat (50), and when the lower template (20) moves downward, the guide seat (50) is driven to move downward synchronously, and the inclined push piece (30) at the top end of the straight push rod (40) slides to the right along the guide seat (50).

2. A straight rod ejection mechanism for a mold according to claim 1, characterized in that: A transverse sliding groove (31) is provided on the inclined ejector (30), and the upper end of the straight ejector rod (40) is slidably connected to the transverse sliding groove (31) of the inclined ejector (30).

3. The straight rod ejection mechanism for a mold according to claim 1, characterized in that: The inclination β of the inclined slideway (51) of the guide seat (50) ranges from 8° to 20°.

4. The straight rod ejection mechanism for a mold according to claim 1, characterized in that: The inclined top member (30) is fixedly provided with a sliding friction block (32) at a position where it slides in contact with the guide seat (50); one side of the sliding friction block (32) is fixedly mounted on the inclined top member (30), and the other side of the sliding friction block (32) is slidingly connected to the inclined slideway (51) of the guide seat (50).

5. The straight rod ejection mechanism for a mold according to claim 1, characterized in that: A face needle plate (60) is provided below the lower template (20) at intervals, and an ejection limiting column (61) is provided on the face needle plate (60).

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