Injection molding part mold with buffer structure

Abstract

The utility model relates to the technical field of injection molding part moulds, in particular to an injection molding part mould with a buffer structure, which comprises a fixed mould and a movable mould, a guide rail is fixed on the surface of the fixed mould, a buffer groove is arranged on the surface of the fixed mould, and a buffer plate is movably inserted in the buffer groove. A buffer spring is fixed between the end, extending into the buffer groove, of the buffer plate and the inner wall of the buffer groove, and a top plate is arranged on the surface of the movable mold. The hydraulic tappet mechanism has the beneficial effects that after the top plate makes contact with the buffer plate, the extending speed of the tappet of the hydraulic tappet mechanism is decreased, meanwhile, the buffer plate is ejected into the buffer groove through the top plate, the buffer spring is compressed, the buffer spring generates counter-acting force on the buffer plate under the elastic effect, and the counter-acting force further slows down the speed of moving a mold; therefore, the buffering effect is achieved, and the impact force generated when the movable mold makes contact with the fixed mold is reduced.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an injection mold with a buffer structure. Background Art

[0002] Plastic parts are used in many industries. The molding of plastic parts is usually carried out using the injection molding process. The injection molding process is completed by an injection molding machine. An injection molding mold is installed on the injection molding machine. The injection molding mold consists of a fixed mold and a movable mold. The fixed mold and the movable mold are each provided with a cavity on the surface of one end close to each other. After the two molds are combined, the injection material is injected into the cavity. After the injection material is cooled into an injection molded part, the movable mold is moved away from the fixed mold and the injection molded part is demolded to complete the injection molding.

[0003] In the prior art, the movement of the mobile mold is usually carried out by a hydraulic push rod mechanism. When hydraulic oil is injected into the hydraulic cylinder, the distance that the push rod extends out of the hydraulic cylinder can be lengthened, thereby pushing the mobile mold closer to the fixed mold. When the hydraulic oil flows back from the hydraulic cylinder to the oil storage tank, the distance that the push rod extends out of the hydraulic cylinder can be shortened, thereby causing the mobile mold to move away from the fixed mold.

[0004] However, in order to save mold closing time and improve efficiency, the existing hydraulic push rod mechanism used to provide power for the mobile mold often pumps hydraulic oil into the hydraulic cylinder at a very fast speed, which makes the mobile mold move towards the fixed mold very quickly, so that the two will generate a relatively large impact force when they come into contact, thereby affecting the service life of the injection mold. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold with a buffer structure 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: an injection mold with a buffer structure, comprising: a fixed mold and a movable mold, a guide rail is fixed on the surface of the fixed mold, a guide hole is opened on the surface of the movable mold, the guide rail is movably inserted in the guide hole, a hydraulic push rod mechanism is arranged at one end of the movable mold away from the fixed mold, the hydraulic push rod mechanism is fixed on the frame of the injection molding machine, an oil storage tank is arranged on the side of the hydraulic push rod mechanism, a buffer groove is opened on the surface of the fixed mold, a buffer plate is movably inserted in the buffer groove, a buffer spring is fixed between one end of the buffer plate extending into the buffer groove and the inner wall of the buffer groove, and a top plate is arranged on the surface of the movable mold.

[0007] Preferably, the buffer groove is an annular groove body, the buffer plate is an annular plate structure, four groups of buffer plates are arranged, two groups of wire grooves are opened on the surface of one group of buffer plates, positive contacts and negative contacts are respectively arranged in the two groups of wire grooves of the buffer plates, the positive contacts and the negative contacts are both connected with wires, the other ends of the two groups of wires are connected to the same group of electric meters with Bluetooth function, and the electric meters with Bluetooth function are fixed on the surface of the fixed mold.

[0008] Preferably, top plates are arranged on the surface of the movable mold, and four groups of top plates are arranged, and the positions of the four groups of top plates correspond one to one with the positions of the four groups of buffer plates.

[0009] Preferably, an oil pump with Bluetooth function is provided in the oil storage tank, an oil pipe is connected to the surface of the oil pump with Bluetooth function, and the other end of the oil pipe is connected to the oil hole provided on the surface of the hydraulic cylinder of the hydraulic tappet mechanism.

[0010] Preferably, a wire groove is provided on the surface of the fixed mold, and the wire groove is connected with the buffer groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides an injection mold with a buffer structure, in which the speed at which the push rod of the hydraulic push rod mechanism extends from the hydraulic cylinder is adjustable, and when the top plate is not in contact with the buffer plate, the push rod of the hydraulic push rod mechanism extends at a relatively fast speed, so that the mobile mold quickly approaches the fixed mold under the guidance of the guide hole and the guide rail, and when the top plate contacts the buffer plate, the speed at which the push rod of the hydraulic push rod mechanism extends becomes slower, and at the same time, the top plate pushes the buffer plate into the buffer groove, which compresses the buffer spring, and the buffer spring generates a reaction force on the buffer plate under the elastic action, and this reaction force further slows down the speed of the mobile mold, thereby playing a buffering role and reducing the impact force when the mobile mold contacts the fixed mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the structure enlargement in the middle;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point B in the middle.

[0017] In the figure: fixed mold 1, movable mold 2, guide hole 3, guide rail 4, hydraulic tappet mechanism 5, oil pipeline 6, oil storage tank 7, oil pump with Bluetooth function 8, electric meter with Bluetooth function 9, buffer plate 10, positive contact 11, negative contact 12, wire 13, wire groove 14, top plate 15, buffer groove 16, buffer spring 17. DETAILED DESCRIPTION

[0018] 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.

[0019] Embodiment 1

[0020] See also Figure 1-Figure 4 The utility model provides a technical solution: an injection mold with a buffer structure, comprising: a fixed mold 1 and a movable mold 2, a guide rail 4 is fixed on the surface of the fixed mold 1, a guide hole 3 is opened on the surface of the movable mold 2, the guide rail 4 is movably inserted in the guide hole 3, a hydraulic push rod mechanism 5 is arranged at one end of the movable mold 2 away from the fixed mold 1, the hydraulic push rod mechanism 5 is fixed on the frame of the injection molding machine, an oil storage tank 7 is arranged on the side of the hydraulic push rod mechanism 5, a buffer groove 16 is opened on the surface of the fixed mold 1, a buffer plate 10 is movably inserted in the buffer groove 16, a buffer spring 17 is fixed between one end of the buffer plate 10 extending into the buffer groove 16 and the inner wall of the buffer groove 16, and a top plate 15 is arranged on the surface of the movable mold 2.

[0021] In actual use, the speed at which the push rod of the hydraulic push rod mechanism 5 extends out from the hydraulic cylinder is adjustable. When the top plate 15 is not in contact with the buffer plate 10, the push rod of the hydraulic push rod mechanism 5 extends out at a relatively fast speed, so that the movable mold 2 quickly approaches the fixed mold 1 under the guidance of the guide hole 3 and the guide rail 4. When the top plate 15 contacts the buffer plate 10, the speed at which the push rod of the hydraulic push rod mechanism 5 extends out slows down. At the same time, the top plate 15 pushes the buffer plate 10 into the buffer groove 16, which compresses the buffer spring 17. The buffer spring 17 generates a reaction force on the buffer plate 10 under the action of elasticity. This reaction force further slows down the speed of the movable mold 2, thereby playing a buffering role and reducing the impact force when the movable mold 2 contacts the fixed mold 1.

[0022] Embodiment 2

[0023] On the basis of the first embodiment, in order to reduce the speed at which the push rod of the hydraulic push rod mechanism 5 extends from the hydraulic cylinder after the buffer plate 10 contacts the top plate 15, the buffer groove 16 is an annular groove body, the buffer plate 10 is an annular plate structure, and the buffer plate 10 is provided with four groups, one of which is provided with two groups of wire grooves on the surface of the buffer plate 10, and the two groups of wire grooves of the buffer plate 10 are respectively provided with a positive contact 11 and a negative contact 12, and the positive contact 11 and the negative contact 12 are both connected to a wire 13, and the two groups of wires 13 The other end is connected to the same group of electric meters 9 with Bluetooth function, and the electric meter 9 with Bluetooth function is fixed on the surface of the fixed mold 1. A top plate 15 is arranged on the surface of the movable mold 2. Four groups of top plates 15 are arranged, and the positions of the four groups of top plates 15 correspond one by one to the positions of the four groups of buffer plates 10. An oil pump 8 with Bluetooth function is arranged in the oil storage tank 7, and an oil pipeline 6 is connected to the surface of the oil pump 8 with Bluetooth function, and the other end of the oil pipeline 6 is connected to the oil hole arranged on the surface of the hydraulic cylinder of the hydraulic tappet mechanism 5.

[0024] The oil pump 8 with Bluetooth function has two gears for pumping oil. The buffer plate 10 is made of insulating material, and the top plate 15 is made of metal material. When the buffer plate 10 is not in contact with the top plate 15, the oil pump 8 with Bluetooth function pumps the hydraulic oil in the oil storage tank 7 into the hydraulic cylinder of the hydraulic tappet mechanism 5 through the oil pipe 6 at a high speed, so that the tappet of the hydraulic tappet mechanism 5 extends at a higher speed, saving the time for the mobile mold 2 to close the mold to the fixed mold 1. When the top plate 15 is in contact with the buffer plate 10, the current of the power supply in the electric meter 9 with Bluetooth function flows to the positive contact 11 through the wire 13 connected to the positive contact 11, and then flows from the positive contact 11 to the positive contact 11. It flows into the top plate 15, then flows to the negative contact 12 through the top plate 15, and finally flows back to the electric meter 9 with Bluetooth function through the wire 13 connected to the negative contact 12, thereby forming a loop. After this loop is monitored by the voltmeter function of the electric meter 9 with Bluetooth function, the Bluetooth function of the electric meter 9 with Bluetooth function sends a signal, and the signal is captured by the Bluetooth function of the oil pump 8 with Bluetooth function, so that the oil pump 8 with Bluetooth function automatically switches to a low-speed gear. The oil pump 8 with Bluetooth function pumps the hydraulic oil in the oil storage tank 7 into the hydraulic cylinder of the hydraulic tappet mechanism 5 through the oil pipe 6 at a low-speed gear, thereby slowing down the extension speed of the tappet of the hydraulic tappet mechanism 5.

[0025] Embodiment 3

[0026] On the basis of the second embodiment, in order to prevent the wire 13 from being squeezed into the buffer groove 16 and causing the wire 13 to be worn after the buffer plate 10 is pushed into the buffer groove 16, a wire groove 14 is opened on the surface of the fixed mold 1, and the wire groove 14 is connected with the buffer groove 16.

[0027] When the buffer plate 10 is pushed into the buffer groove 16 , the wire 13 is pushed into the wire groove 14 , thereby preventing the wire groove 14 from being squeezed into the buffer groove 16 and being worn by the inner wall of the buffer groove 16 and the buffer plate 10 .

[0028] In actual use, the speed at which the push rod of the hydraulic push rod mechanism 5 extends from the hydraulic cylinder is adjustable. When the top plate 15 is not in contact with the buffer plate 10, the push rod of the hydraulic push rod mechanism 5 extends at a relatively fast speed, so that the movable mold 2 is quickly approached to the fixed mold 1 under the guidance of the guide hole 3 and the guide rail 4. When the top plate 15 contacts the buffer plate 10, the speed at which the push rod of the hydraulic push rod mechanism 5 extends slows down. At the same time, the top plate 15 pushes the buffer plate 10 into the buffer groove 16, which compresses the buffer spring 17. The buffer spring 17 reacts to the buffer plate 10 under the elastic action. The reaction force further slows down the speed of the moving mold 2, thereby playing a buffering role and reducing the impact force when the moving mold 2 contacts the fixed mold 1; the oil pump 8 with Bluetooth function has two gears for pumping oil, the buffer plate 10 is made of insulating material, and the top plate 15 is made of metal material. When the buffer plate 10 is not in contact with the top plate 15, the oil pump 8 with Bluetooth function pumps the hydraulic oil in the oil storage tank 7 into the hydraulic cylinder of the hydraulic tappet mechanism 5 through the oil pipe 6 at a high speed, so that the tappet of the hydraulic tappet mechanism 5 extends at a higher speed. The time for the movable mold 2 to close the fixed mold 1 is saved. When the top plate 15 contacts the buffer plate 10, the current of the power supply in the electric meter with Bluetooth function 9 flows to the positive contact 11 through the wire 13 connected to the positive contact 11, and then flows from the positive contact 11 to the top plate 15, and then flows to the negative contact 12 through the top plate 15, and finally flows back to the electric meter with Bluetooth function 9 through the wire 13 connected to the negative contact 12, thereby forming a loop. After this loop is detected by the voltmeter function of the electric meter with Bluetooth function 9, the Bluetooth function of the electric meter with Bluetooth function 9 sends a The signal is captured by the Bluetooth function of the oil pump 8 with Bluetooth function, so that the oil pump 8 with Bluetooth function automatically switches to a low-speed gear. The oil pump 8 with Bluetooth function pumps the hydraulic oil in the oil storage tank 7 into the hydraulic cylinder of the hydraulic tappet mechanism 5 through the oil pipe 6 at a low-speed gear, thereby slowing down the extension speed of the tappet of the hydraulic tappet mechanism 5; when the buffer plate 10 is pushed into the buffer groove 16, the wire 13 is pushed into the wire groove 14, thereby avoiding the wire groove 14 being squeezed into the buffer groove 16 and being worn under the squeezing of the inner wall of the buffer groove 16 and the buffer plate 10.

[0029] 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. An injection mold with a buffer structure, comprising: A fixed mold (1) and a movable mold (2), a guide rail (4) is fixed on the surface of the fixed mold (1), a guide hole (3) is opened on the surface of the movable mold (2), the guide rail (4) is movably inserted in the guide hole (3), a hydraulic push rod mechanism (5) is arranged at one end of the movable mold (2) away from the fixed mold (1), the hydraulic push rod mechanism (5) is fixed on the frame of the injection molding machine, and an oil storage tank (7) is arranged on the side of the hydraulic push rod mechanism (5), characterized in that: a buffer groove (16) is opened on the surface of the fixed mold (1), a buffer plate (10) is movably inserted in the buffer groove (16), a buffer spring (17) is fixed between one end of the buffer plate (10) extending into the buffer groove (16) and the inner wall of the buffer groove (16), and a top plate (15) is arranged on the surface of the movable mold (2).

2. The injection mold with a buffer structure according to claim 1, characterized in that: The buffer groove (16) is an annular groove body, and the buffer plate (10) is an annular plate structure. Four groups of buffer plates (10) are provided, and two groups of wire grooves are opened on the surface of one group of buffer plates (10). The two groups of wire grooves of the buffer plate (10) are respectively provided with positive contacts (11) and negative contacts (12). The positive contacts (11) and the negative contacts (12) are both connected to wires (13). The other ends of the two groups of wires (13) are connected to the same group of electric meters (9) with Bluetooth function. The electric meters (9) with Bluetooth function are fixed on the surface of the fixed mold (1).

3. The injection mold with a buffer structure according to claim 2, characterized in that: A top plate (15) is arranged on the surface of the movable mold (2), and four groups of top plates (15) are arranged, and the positions of the four groups of top plates (15) correspond one to one with the positions of the four groups of buffer plates (10).

4. The injection mold with a buffer structure according to claim 1, characterized in that: An oil pump (8) with a Bluetooth function is arranged in the oil storage tank (7), an oil delivery pipe (6) is connected to the surface of the oil pump (8) with a Bluetooth function, and the other end of the oil delivery pipe (6) is connected to an oil hole arranged on the surface of the hydraulic cylinder of the hydraulic tappet mechanism (5).

5. The injection mold with a buffer structure according to claim 2, characterized in that: A wire groove (14) is provided on the surface of the fixed mold (1), and the wire groove (14) is connected to the buffer groove (16).

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