Injection mold with exhaust structure

Abstract

The utility model discloses an injection mold with an exhaust structure, which comprises a base, the top end of the base is fixedly connected with a lower mold, the top end of the base is fixedly connected with a guide rod, the top end of the guide rod is fixedly connected with an upper mold, and the top end of the upper mold penetrates through and is fixedly connected with an injection pipeline. An exhaust mechanism is arranged at the top end of the upper mold, air passing through the interior is exhausted outwards through an air outlet hole, gas enters the interior of the shell through an air inlet and an air outlet, the gas extrudes a fixing plate, the fixing plate is extruded to drive a rotating rod to rotate in the shell, the rotating rod rotates to drive an extrusion rod to rotate, and the extrusion rod rotates to extrude a stress plate; the stress plate is extruded to move downwards, then the limiting rod is driven to move in the positioning column, the spring is extruded, the spring is in a compressed state, the stress plate drives the knocking block to knock the upper mold, plastic is more evenly distributed in the lower mold, and the injection molding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with a venting structure. Background Technology

[0002] Injection molds are precision tools used for plastic injection molding. By injecting molten plastic into the mold cavity, it cools and solidifies to obtain a plastic product of a specific shape. They are key equipment for the mass production of plastic parts and are widely used in industries such as home appliances, automobiles, medical devices, and packaging.

[0003] Authorization announcement number CN222309686U discloses a venting structure for a micro-foamed injection mold. This venting structure includes a lower mold and an upper mold. A guide rod is fixedly installed on the top of the lower mold, and the upper mold is slidably connected to the outer wall of the guide rod. An injection tube is fixedly installed on the inner wall of the upper mold. A venting hole is opened on the upper part of the upper mold, and a through hole is opened at the bottom of the venting hole. This venting structure, through the use of a cylinder in conjunction with a connecting rod, a protrusion, a rotating cylinder, and a spiral groove, can drive a T-shaped rod to move up and down on the inner wall of the groove. Sliding the T-shaped rod upwards can cause a ball plug to disengage from the through hole, facilitating the discharge of air from the cavity between the upper and lower molds. Sliding the T-shaped rod downwards can cause the ball plug to fit into the inside of the through hole, thus sealing the through hole and preventing plastic from entering and clogging it.

[0004] In the above technical solution, although the ball plug can be used to seal the through hole and prevent plastic from entering the vent hole and causing blockage, the vertical rod, connecting rod and cross rod located below the ball plug may stick to the plastic, causing the plastic to adhere to the bottom of the ball plug, blocking the through hole and affecting the normal venting process in the later stage. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold with a venting structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an injection mold with a venting structure, comprising a base, a lower mold fixedly connected to the top of the base, a guide rod fixedly connected to the top of the base, an upper mold fixedly connected to the top of the guide rod, an injection pipe penetrating and fixedly connected to the top of the upper mold, a venting mechanism provided at the top of the upper mold, an venting pipe fixedly connected to the top of the upper mold, and an outer shell fixedly connected to the inner wall of the venting pipe.

[0007] As a further preferred embodiment of this technical solution, a rotating rod is rotatably connected through the inner wall of the outer shell, and air inlets and outlets are provided at both the top and bottom of the outer shell. A fixing plate is fixedly connected to the outer wall of the end of the rotating rod located inside the outer shell.

[0008] As a further preferred embodiment of this technical solution, an extrusion rod is fixedly connected to the outer wall of one end of the rotating rod located outside the exhaust pipe, a positioning post is fixedly connected to the top of the upper mold, and a limit rod is slidably connected to the inner wall of the positioning post.

[0009] As a further preferred embodiment of this technical solution, a force-bearing plate is fixedly connected to the top of the limiting rod, a spring is fixedly connected to the bottom of the limiting rod, the end of the spring away from the limiting rod is fixedly connected to the bottom of the positioning column, and a striking block is fixedly connected to the bottom of the force-bearing plate.

[0010] As a further preferred embodiment of this technical solution, the upper mold is provided with a cleaning mechanism, and an air vent is provided inside the upper mold. A connecting plate is fixedly connected to the inner wall of the air vent.

[0011] As a further preferred embodiment of this technical solution, a lead screw is rotatably connected through the top of the connecting plate, a worm is rotatably connected through the inner wall of the exhaust pipe, a worm wheel is fixedly connected to the top of the lead screw, and the worm meshes with the worm wheel.

[0012] As a further preferred embodiment of this technical solution, the outer wall of the lead screw is threaded through and connected to a connecting rod, and a conical cleaning block is fixedly connected to the bottom end of the connecting rod.

[0013] This utility model provides an injection mold with a venting structure, which has the following beneficial effects:

[0014] (1) In this utility model, the internal air is discharged outward through the air outlet, and the gas enters the interior of the shell through the air inlet and outlet. The gas compresses the fixed plate, and the fixed plate is compressed, which drives the rotating rod to rotate inside the shell. The rotating rod drives the extrusion rod to rotate, and the extrusion rod rotates to compress the force plate. The force plate is compressed and moves downward, which in turn drives the limiting rod to move inside the positioning column and compresses the spring, so that the spring is in a compressed state. The force plate drives the striking block to strike the upper mold, so that the plastic is more evenly distributed inside the lower mold and the injection efficiency is improved.

[0015] (2) This utility model rotates the worm gear, which drives the worm wheel to rotate. The worm wheel rotates, which drives the lead screw to rotate. The lead screw rotates, which drives the connecting rod to move inside the air outlet, thereby driving the conical cleaning block to move and clean the plastic adhering inside the air outlet, thus extending the service life of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional appearance structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the exhaust mechanism structure of this utility model;

[0019] Figure 4 This is a partial structural diagram of the exhaust mechanism of this utility model;

[0020] Figure 5 This is a schematic diagram of the cleaning mechanism structure of this utility model.

[0021] In the diagram: 1. Base; 2. Lower mold; 3. Guide rod; 4. Upper mold; 5. Injection pipe; 6. Exhaust mechanism; 61. Exhaust pipe; 62. Rotating rod; 63. Extrusion rod; 64. Positioning pin; 65. Spring; 66. Limiting rod; 67. Force plate; 68. Impact block; 69. Outer shell; 610. Air inlet and outlet; 611. Fixing plate; 7. Cleaning mechanism; 71. Air outlet; 72. Connecting plate; 73. Lead screw; 74. Worm gear; 75. Worm; 76. Connecting rod; 77. Conical cleaning block. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] This utility model provides a technical solution: such as Figures 1 to 5 As shown, in this embodiment, an injection mold with a venting structure includes a base 1, a lower mold 2 fixedly connected to the top of the base 1, a guide rod 3 fixedly connected to the top of the base 1, an upper mold 4 fixedly connected to the top of the guide rod 3, an injection pipe 5 passing through and fixedly connected to the top of the upper mold 4, a venting mechanism 6 provided at the top of the upper mold 4, an venting pipe 61 fixedly connected to the top of the upper mold 4, and a shell 69 fixedly connected to the inner wall of the venting pipe 61.

[0024] The inner wall of the outer shell 69 is rotatably connected to a rotating rod 62. Both the top and bottom of the outer shell 69 are provided with air inlets and outlets 610. The outer wall of the rotating rod 62 located inside the outer shell 69 is fixedly connected to a fixing plate 611.

[0025] The fixed plate 611 can be squeezed to drive the rotating rod 62 to rotate.

[0026] Among them, the outer wall of the rotating rod 62 located outside the exhaust pipe 61 is fixedly connected to the extrusion rod 63, and the top of the upper mold 4 is fixedly connected to the positioning post 64. The inner wall of the positioning post 64 is slidably connected to the limit rod 66.

[0027] The positioning post 64 can restrict the movement trajectory of the limiting rod 66.

[0028] The top end of the limiting rod 66 is fixedly connected to a force-bearing plate 67, the bottom end of the limiting rod 66 is fixedly connected to a spring 65, the end of the spring 65 away from the limiting rod 66 is fixedly connected to the bottom end of the positioning post 64, and the bottom end of the force-bearing plate 67 is fixedly connected to a striking block 68.

[0029] Spring 65 can reset the force plate 67 without the influence of external force.

[0030] The upper mold 4 is equipped with a cleaning mechanism 7, and an air vent 71 is provided inside the upper mold 4. A connecting plate 72 is fixedly connected to the inner wall of the air vent 71.

[0031] The cleaning mechanism 7 can clean the plastic adhering to the inside of the vent 71.

[0032] The top of the connecting plate 72 is rotatably connected to a lead screw 73, the inner wall of the exhaust pipe 61 is rotatably connected to a worm 75, the top of the lead screw 73 is fixedly connected to a worm wheel 74, and the worm 75 meshes with the worm wheel 74.

[0033] The worm 75 rotates, which in turn drives the worm wheel 74 to rotate.

[0034] The lead screw 73 has a connecting rod 76 threaded through its outer wall, and a conical cleaning block 77 is fixedly connected to the bottom end of the connecting rod 76.

[0035] The lead screw 73 rotates, which can drive the conical cleaning block 77 to move inside the air outlet 71.

[0036] This utility model provides an injection mold with a venting structure, the specific working principle of which is as follows:

[0037] In use, the upper mold 4 is moved downwards to fit against the lower mold 2. At this time, injection molding is performed inside the lower mold 2 using the injection pipe 5. The air inside is discharged outwards through the vent 71, and the gas enters the interior of the outer shell 69 through the inlet / outlet 610. The gas compresses the fixing plate 611, and the compression of the fixing plate 611 causes the rotating rod 62 to rotate inside the outer shell 69. The rotation of the rotating rod 62 causes the extrusion rod 63 to rotate, and the rotation of the extrusion rod 63 compresses the force plate 67. The force plate 67 is compressed and moves downwards, which in turn causes the limiting rod 66 to move inside the positioning post 64, and also affects the spring. The spring 65 is compressed by the pressure plate 67, which drives the striking block 68 to strike the upper mold 4, making the plastic more evenly distributed inside the lower mold 2 and improving the injection efficiency. After the injection is completed, when it is necessary to clean the inside of the vent 71, the worm 75 is rotated. The rotation of the worm 75 drives the worm wheel 74 to rotate, which in turn drives the lead screw 73 to rotate. The rotation of the lead screw 73 drives the connecting rod 76 to move inside the vent 71, which in turn drives the conical cleaning block 77 to move, cleaning the plastic adhering inside the vent 71 and extending the service life of the device.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold with venting structure comprising a base (1), characterized in that: The top end of the base (1) is fixedly connected with a lower mold (2), the top end of the base (1) is fixedly connected with a guide rod (3), the top end of the guide rod (3) is fixedly connected with an upper mold (4), the top end of the upper mold (4) penetrates and is fixedly connected with an injection pipe (5), the top end of the upper mold (4) is provided with an exhaust mechanism (6), the top end of the upper mold (4) is fixedly connected with an exhaust pipe (61), and the inner wall of the exhaust pipe (61) is fixedly connected with a shell (69).

2. The injection mold with venting structure according to claim 1, wherein: The inner wall of the shell (69) penetrates and is rotatably connected with a rotating rod (62), the top end and the bottom end of the shell (69) are both provided with an air inlet and outlet (610), and one end of the outer wall of the rotating rod (62) located in the shell (69) is fixedly connected with a fixed plate (611).

3. The injection mold with venting structure according to claim 2, wherein: The outer wall of one end of the rotating rod (62) located outside the exhaust pipe (61) is fixedly connected with an extrusion rod (63), the top end of the upper mold (4) is fixedly connected with a positioning column (64), and the inner wall of the positioning column (64) is slidably connected with a limiting rod (66).

4. The injection mold with venting structure according to claim 3, wherein: The top end of the limiting rod (66) is fixedly connected with a stress plate (67), the bottom end of the limiting rod (66) is fixedly connected with a spring (65), one end of the spring (65) away from the limiting rod (66) is fixedly connected to the inner bottom end of the positioning column (64), and the bottom end of the stress plate (67) is fixedly connected with a knocking block (68).

5. The injection mold with venting structure according to claim 4, wherein: The inside of the upper mold (4) is provided with a cleaning mechanism (7), the inside of the upper mold (4) is provided with an air outlet hole (71), and the inner wall of the air outlet hole (71) is fixedly connected with a connecting plate (72).

6. The injection mold with venting structure of claim 5, wherein: The top end of the connecting plate (72) penetrates and is rotatably connected with a lead screw (73), the inner wall of the exhaust pipe (61) penetrates and is rotatably connected with a worm (75), the top end of the lead screw (73) is fixedly connected with a worm wheel (74), and the worm (75) is engaged with the worm wheel (74).

7. The injection mold with venting structure of claim 6, wherein: The outer wall of the lead screw (73) penetrates and is threadedly connected with a connecting rod (76), and the bottom end of the connecting rod (76) is fixedly connected with a conical cleaning block (77).

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