Connecting assembly for double-color injection mold

Abstract

The utility model relates to the technical field of double-color injection molds, in particular to a connecting assembly for a double-color injection mold, which comprises a guide rod, one end of the guide rod is fixed on the surface of a fixed mold, the other end of the guide rod is movably inserted into a guide hole, and the guide hole is arranged on the surface of a movable mold. A lubricating oil storage bin and a valve groove are formed in the movable mold, an oil inlet hole is formed in the surface of the movable mold, an oil outlet hole is formed in the inner wall of the guide hole, and the oil outlet hole is communicated with the lubricating oil storage bin; the device has the beneficial effects that lubricating oil is added into the lubricating oil storage bin, the poking piece is poked to the other end of the poking piece window under friction force so as to drive the valve plate to slide in the valve groove, so that the passing hole is aligned with the oil outlet hole, lubrication is provided between the guide rod and the guide hole, and when the movable mold slides along the guide rod again, an oil film is formed between the guide rod and the guide hole, so that oil leakage is avoided. Therefore, friction force between the guide rod and the guide hole is greatly reduced, and abrasion between the guide rod and the guide hole is reduced.

Description

Technical Field

[0001] The utility model relates to the field of double-color injection molds, in particular to a connecting component for double-color injection molds. Background Art

[0002] A two-color injection mold is a special mold that allows two different colors of plastic materials to be injected on the same injection molding machine. The molding is done twice, but the product is only ejected once. The two-color injection mold consists of a fixed mold and a movable mold.

[0003] In the prior art, the connection component of a two-color injection mold generally consists of a guide rod and a guide hole. One end of the guide rod is fixed on the surface of the fixed mold, and the other end is movably inserted in the guide hole. The guide hole is provided on the surface of the movable mold, thereby connecting the fixed mold and the movable mold. The end of the fixed mold away from the movable mold is installed on the injection molding mechanism, and the end of the movable mold away from the fixed mold is provided with a hydraulic push rod mechanism. The hydraulic push rod mechanism drives the movable mold to slide along the guide rod to complete the mold closing and demolding movements. This connection component can greatly improve the mold closing accuracy.

[0004] However, in the prior art, when the connecting assembly for the two-color injection mold moves along the guide rod, a large friction force will be generated between the guide rod and the guide hole. If the guide rod and the guide hole operate under this working condition for a long time, it will cause the guide rod and the guide hole to be greatly worn, thereby causing a decrease in the mold closing accuracy. Utility Model Content

[0005] The utility model aims to provide a connection assembly for a two-color injection mold to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a connecting assembly for a two-color injection mold, comprising: a guide rod, one end of which is fixed on the surface of a fixed mold, and the other end of the guide rod is movably inserted in a guide hole, the guide hole is provided on the surface of a movable mold, a lubricating oil storage bin and a valve groove are provided inside the movable mold, an oil inlet hole is provided on the surface of the movable mold, an oil outlet hole is provided on the inner wall of the guide hole, the oil outlet hole is connected to the lubricating oil storage bin, a valve plate is slidably connected in the valve groove, and a through hole is provided on the surface of the valve plate.

[0007] Preferably, the through hole and the oil outlet hole have the same shape and size.

[0008] Preferably, an addition pipe is provided at a position where the oil inlet hole is opened on the surface of the movable mold, the addition pipe is in an "L"-shaped tube body, and a top cover is provided at the port of the addition pipe.

[0009] Preferably, a spring is fixed to one end of the valve plate, and the other end of the spring is fixed to the inner wall surface of the valve slot.

[0010] Preferably, a paddle window is provided on the inner wall of the guide hole, the paddle window is connected with the valve slot, the paddle window is in a rectangular slot body, a paddle is slidably connected in the paddle window, and the top end of the paddle is fixed to the bottom end of the valve plate.

[0011] Preferably, one end of the paddle rests on a groove at one end of the paddle window, and the distance between the other end of the paddle and the groove at the other end of the paddle window is equal to the distance between the center line of the through hole and the center line of the oil outlet hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The connecting assembly for a two-color injection mold proposed by the utility model is that before the injection molding machine starts working, lubricating oil is added to the lubricating oil storage bin through the oil inlet hole. After the injection molding starts, the movable mold moves toward the direction close to the fixed mold along the guide rod fixed to the surface of the fixed mold, and the paddle is pushed toward the other end of the paddle window under the friction force, thereby driving the valve plate to slide in the valve groove, so that the through hole and the oil outlet hole are aligned, and the lubricating oil in the lubricating oil storage bin is applied to the gap between the guide rod and the guide hole through the oil outlet hole and the through hole, and is gradually and evenly applied under the extrusion of the guide rod and the guide hole and the sliding of the movable mold, thereby providing lubrication between the guide rod and the guide hole. When the movable mold slides along the guide rod again, an oil film is formed between the guide rod and the guide hole, so that the friction between the guide rod and the guide hole is greatly reduced, thereby reducing the wear between the guide rod and the guide hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0017] In the figure: fixed mold 1, movable mold 2, guide rod 3, guide hole 4, lubricating oil storage tank 5, oil inlet hole

[0018] 6. Adding pipe 7, top cover 8, valve slot 9, valve plate 10, through hole 11, oil outlet hole 12, spring 13, paddle window 14, paddle 15. DETAILED DESCRIPTION

[0019] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1

[0021] See also Figure 1-Figure 3 The utility model provides a technical solution: a connection assembly for a two-color injection mold, comprising: a guide rod 3, one end of the guide rod 3 is fixed on the surface of a fixed mold 1, the other end of the guide rod 3 is movably inserted in a guide hole 4, the guide hole 4 is opened on the surface of a movable mold 2, a lubricating oil storage bin 5 and a valve groove 9 are opened inside the movable mold 2, an oil inlet hole 6 is opened on the surface of the movable mold 2, an oil outlet hole 12 is opened on the inner wall of the guide hole 4, the oil outlet hole 12 is connected to the lubricating oil storage bin 5, a valve plate 10 is slidably connected in the valve groove 9, and the valve plate 1 0 is provided with a through hole 11, and an inner wall of the guide hole 4 is provided with a paddle window 14, which is connected with the valve slot 9, and is in a rectangular slot body. A paddle 15 is slidably connected in the paddle window 14, and the top end of the paddle 15 is fixed to the bottom end of the valve plate 10, and one end of the paddle 15 is against the slot body at one end of the paddle window 14, and the distance between the other end of the paddle 15 and the slot body at the other end of the paddle window 14 is equal to the distance between the center line of the through hole 11 and the center line of the oil outlet hole 12, and the through hole 11 and the oil outlet hole 12 have the same shape and size.

[0022] In actual use, before the injection molding machine starts working, lubricating oil is added to the lubricating oil storage bin 5 through the oil inlet hole 6. After the injection molding starts, the movable mold 2 moves along the guide rod 3 fixed on the surface of the fixed mold 1 toward the fixed mold 1. The paddle 15 is pushed toward the other end of the paddle window 14 under the friction force, thereby driving the valve plate 10 to slide in the valve groove 9, so that the through hole 11 is aligned with the oil outlet hole 12. The lubricating oil in the lubricating oil storage bin 5 is applied to the gap between the guide rod 3 and the guide hole 4 through the oil outlet hole 12 and the through hole 11. Under the extrusion of the guide rod 3 and the guide hole 4 and the sliding of the movable mold 2, the lubricating oil is gradually applied evenly, thereby providing lubrication between the guide rod 3 and the guide hole 4. When the movable mold 2 slides along the guide rod 3 again, an oil film is formed between the guide rod 3 and the guide hole 4, thereby greatly reducing the friction between the guide rod 3 and the guide hole 4, thereby reducing the wear between the guide rod 3 and the guide hole 4.

[0023] Embodiment 2

[0024] On the basis of Example 1, in order to facilitate the addition of lubricating oil to the lubricating oil storage tank 5, an adding pipe 7 is provided at the position where the oil inlet hole 6 is opened on the surface of the movable mold 2. The adding pipe 7 is an "L"-shaped tube body, and a top cover 8 is provided at the port of the adding pipe 7.

[0025] When adding lubricating oil to the lubricating oil storage bin 5, unscrew the top cover 8 from the port of the adding pipe 7, and then pour the lubricating oil into the adding pipe 7. The lubricating oil enters the oil inlet 6 from the adding pipe 7 and finally enters the lubricating oil storage bin 5. When the lubricating oil in the adding pipe 7 is almost added to the port of the adding pipe 7, it appears that the lubricating oil in the lubricating oil storage bin 5 is full, and screw the top cover 8 back to the port of the adding pipe 7.

[0026] Embodiment 3

[0027] On the basis of the second embodiment, in order to automatically slide the valve plate 10 back to its original position after the lubrication condition between the guide rod 3 and the guide hole 4 is relatively good, thereby saving the lubricating oil in the lubricating oil storage tank 5, a spring 13 is fixed to one end of the valve plate 10, and the other end of the spring 13 is fixed to the inner wall surface of the valve groove 9.

[0028] The elastic force of the spring 13 is required to be less than the friction force between the paddle 15 and the guide rod 3 when the lubrication is poor, and greater than the friction force between the paddle 15 and the guide rod 3 when the lubrication is good. The paddle 15 and the movable mold 2 are made of the same material. When the lubrication between the guide rod 3 and the guide hole 4 is poor, the lubrication between the guide rod 3 and the paddle 15 is also poor. At this time, the movable mold 2 slides along the guide rod 3, so that the paddle 15 is moved under the friction force, and the valve plate 10 also slides in the valve groove 9, so that the spring 13 is compressed. When the lubrication between the guide rod 3 and the guide hole 4 is good, the lubrication between the guide rod 3 and the paddle window 14 is also good, then the friction force between the guide rod 3 and the paddle 15 is reduced and is less than the elastic force of the spring 13, so that the spring 13 pushes the valve plate 10 back to its original position, so that the valve plate 10 is automatically slid back to its original position after the lubrication between the guide rod 3 and the guide hole 4 is good, saving the lubricating oil in the lubricating oil storage bin 5.

[0029] In actual use, before the injection molding machine starts working, lubricating oil is added to the lubricating oil storage bin 5 through the oil inlet hole 6. After the injection molding starts, the movable mold 2 moves toward the fixed mold 1 along the guide rod 3 fixed to the surface of the fixed mold 1. The paddle 15 is pushed toward the other end of the paddle window 14 under the friction force, thereby driving the valve plate 10 to slide in the valve groove 9, so that the through hole 11 is aligned with the oil outlet hole 12. The lubricating oil in the lubricating oil storage bin 5 is applied to the gap between the guide rod 3 and the guide hole 4 through the oil outlet hole 12 and the through hole 11. The oil is gradually and evenly applied under the extrusion of the rod 3 and the guide hole 4 and the sliding of the movable die 2, thereby providing lubrication between the guide rod 3 and the guide hole 4. When the movable die 2 slides along the guide rod 3 again, an oil film is formed between the guide rod 3 and the guide hole 4, so that the friction between the guide rod 3 and the guide hole 4 is greatly reduced, thereby reducing the wear between the guide rod 3 and the guide hole 4; when adding lubricating oil to the lubricating oil storage bin 5, unscrew the top cover 8 from the port of the adding pipe 7, and then pour the lubricating oil into the adding pipe 7, and the lubricating oil enters the oil inlet hole 6 from the adding pipe 7. After that, it enters the lubricating oil storage bin 5. When the lubricating oil in the adding pipe 7 is almost added to the port of the adding pipe 7, the surface lubricating oil storage bin 5 is full, and the top cover 8 is screwed back to the port of the adding pipe 7; the elastic force of the spring 13 is required to be less than the friction between the paddle 15 and the guide rod 3 when the lubrication is poor, and greater than the friction between the paddle 15 and the guide rod 3 when the lubrication is good. The paddle 15 and the movable mold 2 are made of the same material. When the lubrication between the guide rod 3 and the guide hole 4 is poor, the lubrication between the guide rod 3 and the paddle 15 is also poor. At this time, the movable mold 2 slides along the guide rod 3, so that the paddle 15 is moved under the friction force, and the valve plate 10 also slides in the valve groove 9, so that the spring 13 is compressed. When the lubrication between the guide rod 3 and the guide hole 4 is good, and the lubrication between the guide rod 3 and the paddle window 14 is also good, the friction between the guide rod 3 and the paddle 15 is reduced and is smaller than the elastic force of the spring 13, so that the spring 13 pushes the valve plate 10 back to its original position, so that the valve plate 10 is automatically slid back to its original position after the lubrication between the guide rod 3 and the guide hole 4 is good, saving the lubricating oil in the lubricating oil storage bin 5.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connection assembly for a two-color injection mold, comprising: A guide rod (3), one end of which is fixed on the surface of a fixed mold (1), and the other end of which is movably inserted into a guide hole (4), which is provided on the surface of a movable mold (2). The invention is characterized in that a lubricating oil storage bin (5) and a valve groove (9) are provided inside the movable mold (2), an oil inlet hole (6) is provided on the surface of the movable mold (2), an oil outlet hole (12) is provided on the inner wall of the guide hole (4), the oil outlet hole (12) is connected to the lubricating oil storage bin (5), a valve plate (10) is slidably connected in the valve groove (9), and a through hole (11) is provided on the surface of the valve plate (10).

2. A connection assembly for a two-color injection mold according to claim 1, characterized in that: The through hole (11) and the oil outlet hole (12) have the same shape and the same size.

3. The connection assembly for a two-color injection mold according to claim 1, characterized in that: An addition pipe (7) is arranged at a position where an oil inlet hole (6) is opened on the surface of the movable mold (2); the addition pipe (7) is an "L"-shaped pipe body, and a top cover (8) is arranged at the end of the addition pipe (7).

4. The connection assembly for a two-color injection mold according to claim 1, characterized in that: A spring (13) is fixed to one end of the valve plate (10), and the other end of the spring (13) is fixed to the inner wall surface of the valve groove (9).

5. The connection assembly for a two-color injection mold according to claim 1, characterized in that: A paddle window (14) is provided on the inner wall of the guide hole (4), the paddle window (14) is connected to the valve groove (9), the paddle window (14) is in the form of a rectangular groove, a paddle (15) is slidably connected in the paddle window (14), and the top end of the paddle (15) is fixed to the bottom end of the valve plate (10).

6. A connection assembly for a two-color injection mold according to claim 5, characterized in that: One end of the paddle (15) abuts against a groove at one end of the paddle window (14), and the distance between the other end of the paddle (15) and the groove at the other end of the paddle window (14) is equal to the distance between the center line of the through hole (11) and the center line of the oil outlet hole (12).

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