Single-point hot nozzle injection molding oil valve

Abstract

The utility model discloses a single-point hot nozzle injection molding oil valve, and relates to the technical field of single-point hot nozzle injection molding oil valves. The second oil cylinder assembly is installed in an inner cavity of the first oil cylinder assembly. The oil cylinder upper cover is connected with the first oil cylinder assembly and the second oil cylinder assembly through connecting cylinder body screws. The main nozzle assembly is arranged in the middle of the oil cylinder upper cover; the nozzle rotation stopping pin and the water conveying sleeve rotation stopping pin are installed on the inner side of the second oil cylinder assembly. The piston assembly is connected with the main nozzle assembly; the water conveying sleeve body is installed in an inner cavity of the second oil cylinder assembly. The hot nozzle body is arranged in an inner cavity of the water conveying sleeve body. Through the arrangement mode that the first oil cylinder assembly, the second oil cylinder assembly and the piston assembly are matched, under the influence of the pressure of an oil cavity, the piston body can drive the valve needle to move and is used for closing a cavity sprue, pressure maintaining of a mold cavity is achieved, and residual marks on the surface of a product are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of single-point hot nozzle injection molding oil valves, and in particular to a single-point hot nozzle injection molding oil valve. Background Technology

[0002] Single-point hot-nozzle injection molding is a novel injection molding technology that integrates hot runner and hot nozzle technologies. In traditional injection molding, plastic material enters the mold through the nozzle of the injection molding machine for molding. Single-point hot-nozzle injection molding combines these two technologies, placing a single hot nozzle and hot runner at the mold inlet. The hot nozzle forces molten plastic material into the mold through the inlet and ensures the plastic's fluidity through heating and pressure holding. The molten plastic material is then transported to the mold cavity through the hot runner system for injection molding. This technology allows for precise control of the flow of molten plastic and the molding process.

[0003] However, existing single-point hot nozzle injection valve needles typically use cylinder control devices to move the valve needle. The use and control of cylinders or other electric actuators require precise preset programs or parameters to drive the valve needle to move up and down. After the melt is injected, if even a slight error occurs, the valve needle may fail to seal the gate, making it impossible to maintain pressure in the injection cavity within the mold core. Furthermore, the valve needle may fail to close the gate before the melt has completely solidified, thus easily leaving gate marks on the surface of the molded product. Utility Model Content

[0004] The purpose of this invention is to provide a single-point hot nozzle injection molding oil valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a single-point hot nozzle injection molding oil valve, comprising:

[0006] The first hydraulic cylinder assembly is connected to the oil pump via an oil pipe, and the first hydraulic cylinder assembly is used for the inlet and outlet of hydraulic oil;

[0007] The second hydraulic cylinder assembly is installed inside the cavity of the first hydraulic cylinder assembly and extends above the second hydraulic cylinder assembly;

[0008] The cylinder cover is connected to the first cylinder assembly and the second cylinder assembly via connecting cylinder bolts;

[0009] The main nozzle assembly is located in the middle of the upper cover of the hydraulic cylinder;

[0010] The nozzle anti-rotation pin and the water jacket anti-rotation pin are respectively installed on the inner side of the second cylinder assembly;

[0011] The piston assembly is connected to the main nozzle assembly;

[0012] a water jacket body, installed in the inner cavity of the second oil cylinder assembly;

[0013] a hot nozzle body, arranged in the inner cavity of the water jacket body.

[0014] Preferably, the first oil cylinder assembly comprises:

[0015] a first oil cylinder body, connected with the second oil cylinder assembly through a connecting cylinder screw;

[0016] a first oil channel, arranged on one side of the first oil cylinder body;

[0017] a second oil channel, arranged on the outer wall of the first oil cylinder body, and arranged below the first oil channel;

[0018] a first oil cavity and a second oil cavity, arranged on the top and bottom of the first oil cylinder body, respectively.

[0019] Preferably, the second oil cylinder assembly comprises:

[0020] a second oil cylinder body, installed between the first oil cylinder body and the oil cylinder upper cover through the connecting cylinder screw;

[0021] a sealing ring pressing block, installed on the inner wall of the second oil cylinder body through a screw;

[0022] a Y-shaped sleeve, installed on the bottom of the sealing ring pressing block.

[0023] Preferably, the main nozzle assembly comprises:

[0024] a main nozzle connecting piece, arranged on the top of the hot nozzle body;

[0025] a main nozzle body, installed on the top of the main nozzle connecting piece;

[0026] a main nozzle rotation-stopping pin, connected with the main nozzle body through the oil cylinder upper cover;

[0027] a main nozzle internal rotation-stopping pin, connected with the main nozzle body through the main nozzle connecting piece;

[0028] a valve needle, slidingly installed on the middle part of the main nozzle body, and connected with the piston assembly.

[0029] Preferably, the piston assembly comprises:

[0030] A piston body is in sliding sealing connection with the inner cavity of the first oil cylinder body, and is used for distinguishing the first oil cavity and the second oil cavity;

[0031] Two piston connecting rods are respectively installed on the top of the piston body;

[0032] A movable top rod is installed between the two piston connecting rods and is in sliding insertion connection with the middle part of the main nozzle body.

[0033] Preferably, the movable top rod is connected with the top of a valve needle which is in sliding connection with the inner cavity of the hot nozzle body.

[0034] The technical effects and advantages of the present application are as follows:

[0035] The first oil cylinder assembly, the second oil cylinder assembly and the piston assembly are cooperatively arranged, and the oil in the oil pump is used to make the piston assembly drive the valve needle of the main nozzle assembly to move up and down, so that the piston body can drive the valve needle to move when an error occurs or after the injection is completed, and the pressure of the oil cavity is used to realize the pressure maintaining of the mold cavity and reduce the residual marks on the surface of the product. BRIEF DESCRIPTION OF DRAWINGS

[0036] Fig. 1 It is a whole front structure schematic view of the present application.

[0037] Fig. 2 It is a whole side structure schematic view of the present application.

[0038] Fig. 3 It is a whole bottom structure schematic view of the present application.

[0039] In the figure: 1, first oil cylinder assembly; 11, first oil cylinder body; 12, first oil way; 13, second oil way; 14, first oil cavity; 15, second oil cavity; 2, second oil cylinder assembly; 21, second oil cylinder body; 22, sealing ring pressing block; 23, Y-shaped sleeve; 3, oil cylinder upper cover; 4, main nozzle assembly; 41, main nozzle connecting piece; 42, main nozzle body; 43, main nozzle rotation stopping pin; 44, main nozzle internal rotation stopping pin; 45, valve needle; 5, nozzle rotation stopping pin; 6, water conveying sleeve rotation stopping pin; 7, piston assembly; 71, piston body; 72, piston connecting rod; 73, movable top rod; 8, water conveying sleeve body; 9, hot nozzle body. DETAILED DESCRIPTION

[0040] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0041] The utility model provides a kind of single-point hot nozzle injection oil valve as shown in Figs. 1-3 It includes: first oil cylinder assembly 1, second oil cylinder assembly 2, oil cylinder upper cover 3, main nozzle assembly 4, nozzle stop pin 5, water-carrying sleeve stop pin 6, piston assembly 7, water-carrying sleeve body 8 and hot nozzle body 9, first oil cylinder assembly 1 is connected with oil pump by oil pipe, and first oil cylinder assembly 1 is used for the import and export of hydraulic oil, oil cylinder upper cover 3 is connected with first oil cylinder assembly 1 and second oil cylinder assembly 2 by connecting cylinder body screw;

[0042] Specifically, first oil cylinder assembly 1 includes: first oil cylinder body 11, first oil way 12, second oil way 13, first oil cavity 14 and second oil cavity 15, first oil cylinder body 11 is connected with second oil cylinder assembly 2 by connecting cylinder body screw, first oil way 12 and second oil way 13 are import and export oil ways, and first oil way 12 and second oil way 13 are connected with the import and export of oil pump by oil pipe respectively, first oil way 12 is opened in the side of first oil cylinder body 11, second oil way 13 is opened in the outer wall of first oil cylinder body 11, second oil way 13 is arranged below first oil way 12, first oil cavity 14 and second oil cavity 15 are arranged at the top and bottom of first oil cylinder body 11 respectively, and first oil cavity 14 and second oil cavity 15 are used for the import and export of oil in oil pump respectively;

[0043] Further, second oil cylinder assembly 2 is installed in the inner cavity of first oil cylinder assembly 1 and extends above second oil cylinder assembly 2, and second oil cylinder assembly 2 includes: second oil cylinder body 21, sealing ring pressing block 22 and Y-shaped sleeve 23, second oil cylinder body 21 is installed between first oil cylinder body 11 and oil cylinder upper cover 3 by connecting cylinder body screw, water-carrying sleeve body 8 is installed on the inner wall of second oil cylinder body 21, sealing ring pressing block 22 is installed on the inner wall of second oil cylinder body 21 by screw, and Y-shaped sleeve 23 is installed at the bottom of sealing ring pressing block 22;

[0044] The main nozzle assembly 4 is arranged in the middle of the oil cylinder upper cover 3, and the main nozzle assembly 4 comprises a main nozzle connecting piece 41, a main nozzle body 42, a main nozzle rotation stopping pin 43, a main nozzle internal rotation stopping pin 44 and a valve needle 45. The main nozzle connecting piece 41 is arranged at the top of the hot nozzle body 9, the main nozzle body 42 is installed at the top of the main nozzle connecting piece 41, the main nozzle rotation stopping pin 43 is connected with the main nozzle body 42 through the oil cylinder upper cover 3, the main nozzle internal rotation stopping pin 44 is connected with the main nozzle body 42 through the main nozzle connecting piece 41, and the valve needle 45 is slidingly installed in the middle of the main nozzle body 42. The main nozzle body 42 is connected with the injection molding machine nozzle for feeding the melt, and the water jacket body 8 is installed in the inner cavity of the second oil cylinder assembly 2. The hot nozzle body 9 is arranged in the inner cavity of the water jacket body 8, and the valve needle 45 is slidingly connected with the inner cavity of the hot nozzle body 9. The valve needle 45 is usually an elongated metal rod, which is designed to control the melt flow in the hot runner. The valve needle 45 is slidingly fitted in the middle of the main nozzle connecting piece 41 and the main nozzle body 42, and the melt flow is controlled by the up-down movement of the valve needle 45.

[0045] Furthermore, the nozzle rotation stopping pin 5 and the water jacket rotation stopping pin 6 are respectively installed on the inner side of the second oil cylinder assembly 2. The piston assembly 7 is connected with the main nozzle assembly 4, the valve needle 45 is connected with the piston assembly 7, and the piston assembly 7 comprises a piston body 71, two piston connecting rods 72 and a movable top rod 73. The piston body 71 is slidingly and sealingly connected with the inner cavity of the first oil cylinder body 11, and is used for distinguishing the first oil cavity 14 and the second oil cavity 15. The two piston connecting rods 72 are respectively installed at the top of the piston body 71, and the movable top rod 73 is installed between the two piston connecting rods 72. The movable top rod 73 is slidingly and penetratingly connected with the middle of the main nozzle body 42, and the movable top rod 73 is connected with the top of the valve needle 45. After the hydraulic oil is output from the oil pump, it enters the inner cavity of the second oil cavity 15 through the second oil channel 13, and the oil in the first oil cavity 14 is output from the inner cavity of the first oil channel 12 at the same time. At the same time, the pressure in the second oil cavity 15 rises, pushing the piston body 71 to move and driving the valve needle 45 to move upwards, so as to realize the injection of the melt into the rubber injection of the mold core, and complete the product injection molding. After the product injection molding is completed, the pressure in the second oil channel 13 decreases to a negative pressure state, the first oil channel 12 is pressurized to input oil, the hydraulic oil enters the first oil cavity 14 from the first oil channel 12, the pressure rises, and the piston valve needle 45 moves downwards to close the cavity, thus completing the whole working process, realizing the pressure maintaining of the injection cavity in the mold core, and reducing the surface residue of the injection molded product.

[0046] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A single-point hot-nozzle injection oil valve, characterized by, The utility model relates to a hydraulic pressure pump, which comprises the following parts: a first oil cylinder assembly (1) connected with an oil pump through an oil pipe and used for the input and output of hydraulic oil; a second oil cylinder assembly (2) installed in the inner cavity of the first oil cylinder assembly (1) and extending upwards; an oil cylinder upper cover (3) connected with the first oil cylinder assembly (1) and the second oil cylinder assembly (2) through connecting cylinder body screws; a main nozzle assembly (4) arranged in the middle of the oil cylinder upper cover (3); a nozzle rotation stopping pin (5) and a water carrying sleeve rotation stopping pin (6) respectively installed on the inner side of the second oil cylinder assembly (2); a piston assembly (7) connected with the main nozzle assembly (4); a water carrying sleeve body (8) installed in the inner cavity of the second oil cylinder assembly (2); a hot nozzle body (9) arranged in the inner cavity of the water carrying sleeve body (8).

2. A single-point hot-nozzle injection oil valve according to claim 1, characterized in that, The first oil cylinder assembly (1) comprises: a first oil cylinder body (11) connected with the second oil cylinder assembly (2) through connecting cylinder body screws; a first oil channel (12) arranged on one side of the first oil cylinder body (11); a second oil channel (13) arranged on the outer wall of the first oil cylinder body (11) and below the first oil channel (12); a first oil cavity (14) and a second oil cavity (15) respectively arranged on the top and bottom of the first oil cylinder body (11).

3. A single-point hot-nozzle injection oil valve according to claim 2, characterized in that The second oil cylinder assembly (2) comprises: a second oil cylinder body (21) installed between the first oil cylinder body (11) and the oil cylinder upper cover (3) through connecting cylinder body screws; a sealing ring pressing block (22) installed on the inner wall of the second oil cylinder body (21) through screws; a Y-shaped sleeve (23) installed on the bottom of the sealing ring pressing block (22).

4. A single-point hot-nozzle injection oil valve according to claim 2, characterized in that, The main nozzle assembly (4) comprises: a main nozzle connector (41) arranged on the top of the hot nozzle body (9); a main nozzle body (42) installed on the top of the main nozzle connector (41); a main nozzle rotation stopping pin (43) connected with the main nozzle body (42) through the oil cylinder upper cover (3); a main nozzle inner rotation stopping pin (44) connected with the main nozzle body (42) through the main nozzle connector (41); a valve needle (45) slidingly installed on the middle of the main nozzle body (42) and connected with the piston assembly (7).

5. A single-point hot-nozzle injection oil valve according to claim 4, characterized in that The piston assembly (7) comprises: a piston body (71) slidingly and sealingly connected with the inner cavity of the first oil cylinder body (11) and used for the division of the inner cavities of the first oil cavity (14) and the second oil cavity (15). Two piston connecting rods (72), two said piston connecting rods (72) are respectively installed on the top of the piston body (71); The movable top rod (73) is installed between the two piston connecting rods (72), and the movable top rod (73) is in sliding connection with the middle part of the main nozzle body (42).

6. A single-point hot-nozzle injection oil valve according to claim 5, characterized in that The movable top rod (73) is connected with the top of the valve needle (45), and the valve needle (45) is in sliding connection with the inner cavity of the hot nozzle body (9).

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