Novel hot runner injection mold device

Abstract

The utility model relates to the technical field of injection molds, and discloses a novel hot runner injection mold device which comprises a mold frame, a fixed mold and a movable mold which are matched with each other for use are arranged on the mold frame, a mounting frame is fixed on the mold frame, an air cylinder is fixed on the mounting frame, and the air cylinder is fixed on the mounting frame. A blade used for cutting a sprue is arranged at the tail end of an output shaft of the air cylinder, and a polishing assembly used for polishing the plastic product with the sprue cut is further arranged at the tail end of the output shaft of the air cylinder. According to the novel hot runner injection mold device provided by the utility model, after a plastic product is subjected to mold opening, a cutting surface at a cutting sprue can be polished, so that the sprue of the plastic product is smooth and burr-free, the overall quality and the appearance attractiveness of the product are improved, and meanwhile, the sharp cutting surface is prevented from hurting workers.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a novel hot runner injection mold device. Background Art

[0002] A hot runner mold refers to a mold that uses a heating device to prevent the melt in the runner from solidifying. Because it has a shorter molding cycle than traditional molds and saves more raw materials, hot runner molds are widely used in industrially developed countries and regions in the world today.

[0003] After searching, an automatic shearing gate injection mold for accessories with a publication number of CN216760640U includes a working plate, a working frame is arranged on the upper surface of the working plate, a fixed column is arranged on the inner wall of the working frame, a lower injection mold is arranged at one end of the fixed column, a clamping mechanism is arranged on the upper surface of the working frame, an upper injection mold is arranged at one end of the clamping mechanism, a lifting mechanism is arranged on the upper surface of the working plate, a lifting plate is arranged at one end of the lifting mechanism, a shearing mechanism is arranged on the surface of the lifting plate, and a supporting mechanism is arranged at the bottom of the working plate. When the molded plastic part is located in the lower injection mold, the second air pressure pump can be used to drive the first air pressure rod and drive the lifting plate to rise and fall to a suitable height, and then the first air pressure pump is used to drive the second air pressure rod and drive the shearing blade to cut off the gate on the surface of the plastic part, thereby ensuring the aesthetics and practicality of the plastic part, improving work efficiency, and saving manpower and material resources. However, the above technical solution still has the following deficiencies when it is actually used:

[0004] In the prior art, a pneumatic rod can be used to cut off the gate of a plastic product after mold opening, thereby reducing the workload of workers in cutting the gate. However, since plastic products have a certain deformation force, the blade will first squeeze the gate when cutting, causing the gate to deform. In this way, the cut surface after cutting the gate may be uneven, thereby affecting the quality and aesthetics of the plastic product. This is particularly critical for some application scenarios with high requirements on precision or strict requirements on surface smoothness. Secondly, the unevenness of the cutting area may make the cut surface sharper, posing a safety hazard to workers during operation, inspection or cleaning, and there is a risk of scratching their hands.

[0005] Therefore, it is necessary to design a new hot runner injection mold device to solve the above problems. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a novel hot runner injection mold device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A novel hot runner injection mold device includes a mold frame, on which a fixed mold and a movable mold that cooperate with each other are provided, a mounting frame is fixed to the mold frame, a cylinder is fixed to the mounting frame, a blade for cutting a gate is provided at the end of the output shaft of the cylinder, and a polishing component for polishing the plastic product after the gate is cut is also provided at the end of the output shaft of the cylinder.

[0009] As a preferred technical solution of the utility model, the grinding assembly includes a sliding rod fixedly connected to the end of the cylinder output shaft, the blade is fixedly connected to the bottom of the sliding rod, the side wall of the sliding rod is provided with a mounting groove, the interior of the mounting groove is provided with a grinding disc facing the movable mold, the interior of the mounting groove is provided with a connecting piece for making the grinding disc close to the plastic product, and the output shaft of the cylinder is also provided with a rotating piece for driving the grinding disc to rotate.

[0010] As a preferred technical solution of the utility model, the connecting part includes a placing cylinder rotatably connected to the inner side of the mounting groove, a moving rod is slidably connected to the inside of the placing cylinder, a spring 2 is provided between the moving rod and the inner side of the placing cylinder, one end of the moving rod away from the spring 2 extends to the outside of the placing cylinder, and the end of the moving rod located outside the placing cylinder is fixed to the grinding disc.

[0011] As a preferred technical solution of the utility model, the rotating part includes a sleeve with an open bottom, the sliding rod is slidably connected to the inside of the sleeve, and the end of the output shaft of the cylinder passes through the top of the sleeve, a spring is provided between the top of the sliding rod and the inner top surface of the sleeve, two pressure plates are fixedly connected to the side wall of the sleeve, and the two pressure plates are respectively opposite to the fixed mold and the movable mold after the mold is opened, the placing cylinder fixed sleeve is provided with a gear, and the bottom of the sleeve is fixedly connected to a rack matching the gear, and the mounting groove is open on the side facing the rack.

[0012] As a preferred technical solution of the utility model, the longitudinal section of the placement tube is in a U-shaped structure, and the moving rod is adapted to the placement tube.

[0013] As a preferred technical solution of the utility model, the rack is provided with a plurality of teeth matched with the gear, and all of the teeth are directly opposite to the gate of the plastic product after the mold is opened.

[0014] The utility model has the following beneficial effects:

[0015] 1. Improve product quality and aesthetics: By setting up a grinding component, the grinding disc can rotate during the downward movement after cutting, and then grind the cut surface, ensuring that the gate of the plastic product is smooth and burr-free, thereby improving the overall quality and appearance of the product;

[0016] 2. Improved safety: The grinding disc can grind the cutting surface to ensure the flatness of the cutting surface, which can prevent the sharpness of the cutting surface from causing harm to the staff and reduce the risk of injury that may occur during the work process;

[0017] 3. Improved grinding effect: Under the action of spring 2, the grinding disc can always be against the cutting surface, which can ensure the grinding effect, improve the grinding efficiency and the applicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a new hot runner injection mold device proposed by the utility model;

[0019] Figure 2 for Figure 1 A magnified view of the structure at A;

[0020] Figure 3 is a schematic diagram of the internal structure of the installation slot;

[0021] Figure 4 Schematic diagram of the internal structure of the slider;

[0022] Figure 5 for Figure 4 Enlarged view of the structure at B.

[0023] In the figure: 1 mold frame, 2 fixed mold, 3 movable mold, 4 mounting frame, 5 cylinder, 6 sleeve, 7 pressure plate, 8 slide bar, 9 spring 1, 10 blade, 11 mounting groove, 12 placement cylinder, 13 moving rod, 14 grinding disc, 15 spring 2, 16 gear, 17 rack. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-5 A new hot runner injection mold device includes a mold frame 1, on which a fixed mold 2 and a movable mold 3 that cooperate with each other are provided, a mounting frame 4 is fixed to the mold frame 1, a cylinder 5 is fixed to the mounting frame 4, a blade 10 for cutting a gate is provided at the end of the output shaft of the cylinder 5, and a polishing component for polishing the plastic product after the gate is cut is also provided at the end of the output shaft of the cylinder 5.

[0026] Reference Figure 3 and Figure 4The grinding assembly includes a slide bar 8 fixedly connected to the end of the output shaft of the cylinder 5, a blade 10 fixedly connected to the bottom of the slide bar 8, a mounting groove 11 is provided on the side wall of the slide bar 8, and a grinding disc 14 facing the movable mold 3 is provided inside the mounting groove 11. When the grinding disc 14 moves downward with the slide bar 8, the grinding disc 14 can grind the cutting surface to ensure the quality of the plastic product production. A connecting piece for making the grinding disc 14 close to the plastic product is provided inside the mounting groove 11, and a rotating piece for driving the grinding disc 14 to rotate is also provided on the output shaft of the cylinder 5.

[0027] Reference Figure 5 The connecting part includes a placement cylinder 12 rotatably connected to the inner side of the mounting groove 11, a moving rod 13 is slidably connected to the inside of the placement cylinder 12, a spring 15 is provided between the moving rod 13 and the inner side of the placement cylinder 12, one end of the moving rod 13 away from the spring 15 extends to the outside of the placement cylinder 12, one end of the moving rod 13 located outside the placement cylinder 12 is fixed to the grinding disc 14, one end of the spring 15 is fixed to the side wall of the moving rod 13, and the other end of the spring 15 is fixed to the inner side of the placement cylinder 12. Under the action of the spring 15, the grinding disc 14 can always be in close contact with the cutting surface, so that the cutting effect can be guaranteed.

[0028] Reference Figure 3 and Figure 4 The rotating part includes a sleeve 6 with an open bottom, a slide bar 8 is slidably connected to the inside of the sleeve 6, and the output shaft end of the cylinder 5 passes through the top of the sleeve 6, a spring 9 is provided between the top of the slide bar 8 and the inner top surface of the sleeve 6, and two pressure plates 7 are fixedly connected to the side wall of the sleeve 6, and the two pressure plates 7 are respectively opposite to the fixed mold 2 and the movable mold 3 after the mold is opened. The placement cylinder 12 is fixedly sleeved with a gear 16, and the bottom of the sleeve 6 is fixedly connected with a rack 17 matched with the gear 16. The mounting groove 11 is open on one side of the rack 17, and the pressure plate 7 plays a limiting role. When the pressure plate 7 contacts the movable mold 3 and the fixed mold 2, the sleeve 6 can stop moving down, and then the position of the rack 17 can be fixed, so that the gear 16 moves down to the gate and can mesh with the rack 17, so that the grinding disc 14 can grind the cutting surface to ensure the flatness of the cutting surface, thereby ensuring the aesthetics and quality of the plastic product and preventing the sharp cutting surface from causing accidental injuries to the staff.

[0029] Reference Figure 3 and Figure 5 The longitudinal section of the placement cylinder 12 is in a U-shaped structure, and the moving rod 13 is adapted to the placement cylinder 12. The placement cylinder 12 limits the moving rod 13, so that the rotation of the placement cylinder 12 can drive the rotation of the moving rod 13 and the grinding disc 14.

[0030] Reference Figure 3The rack 17 is provided with a plurality of teeth matched with the gear 16, and all the teeth are directly opposite to the gate of the plastic product after the mold is opened, so that the gear 16 will mesh with the rack 17 only when it moves near the gate, thereby driving the grinding disc 14 to rotate, which can prevent the grinding disc 14 from affecting the fineness of other positions of the plastic product, thereby ensuring the consistency and precision of the plastic product manufacturing.

[0031] The specific working principle of the utility model is as follows:

[0032] After the plastic product is cooled and formed, the staff drives the movable mold 3 to move to open the mold, and then starts the cylinder 5. The end of the output shaft of the cylinder 5 moves downward, so that the slide bar 8 and the sleeve 6 move together, so that the blade 10 and the grinding disc 14 on the slide bar 8 move downward. When the pressing plate 7 contacts the movable mold 3 and the fixed mold 2, the pressing plate 7 limits the sleeve 6, so that the sleeve 6 and the rack 17 on the sleeve 6 stop moving downward. At this time, as the slide bar 8 continues to move downward, the spring 9 is in a stretched state. At this time, the blade 10 can cut the gate under the downward movement of the slide bar 8. After cutting, the slide bar 8 continues to move downward. At this time, the gear 16 and the rack 17 are meshed and rotated, thereby driving the placement tube 12 to rotate. Under the limiting effect of the placement tube 12 on the moving rod 13, the moving rod 13 and the grinding disc 14 rotate, so that the grinding disc 14 can rotate during the downward movement and then grind the cutting surface, thereby ensuring the quality and aesthetics of the plastic products, while also preventing the sharp cutting surface from causing harm to the staff. It is worth mentioning that during the grinding process, under the action of the spring 2 15, the grinding disc 14 can always be in close contact with the cutting surface, thereby ensuring the grinding effect and the flatness of the cutting area.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel hot runner injection mold device, comprising a mold frame (1), characterized in that: The mold frame (1) is provided with a fixed mold (2) and a movable mold (3) which cooperate with each other, a mounting frame (4) is fixed on the mold frame (1), a cylinder (5) is fixed on the mounting frame (4), a blade (10) for cutting a gate is provided at the end of the output shaft of the cylinder (5), and a grinding component for grinding the plastic product after the gate is cut is also provided at the end of the output shaft of the cylinder (5).

2. A new hot runner injection mold device according to claim 1, characterized in that: The grinding assembly comprises a slide bar (8) fixedly connected to the end of the output shaft of the cylinder (5); the blade (10) is fixedly connected to the bottom of the slide bar (8); a mounting groove (11) is provided on the side wall of the slide bar (8); a grinding disc (14) facing the movable mold (3) is provided inside the mounting groove (11); a connecting piece for making the grinding disc (14) closely attached to the plastic product is provided inside the mounting groove (11); and a rotating piece for driving the grinding disc (14) to rotate is also provided on the output shaft of the cylinder (5).

3. A new hot runner injection mold device according to claim 2, characterized in that: The connecting member comprises a placement tube (12) rotatably connected to the inner side of the installation groove (11); a moving rod (13) is slidably connected to the inside of the placement tube (12); a second spring (15) is provided between the moving rod (13) and the inner side of the placement tube (12); an end of the moving rod (13) away from the second spring (15) extends to the outside of the placement tube (12); and an end of the moving rod (13) located outside the placement tube (12) is fixed to a grinding disc (14).

4. A new hot runner injection mold device according to claim 3, characterized in that: The rotating member comprises a sleeve (6) with an open bottom, the sliding rod (8) is slidably connected inside the sleeve (6), and the output shaft end of the cylinder (5) passes through the top of the sleeve (6), a spring (9) is provided between the top of the sliding rod (8) and the inner top surface of the sleeve (6), two pressure plates (7) are fixedly connected to the side wall of the sleeve (6), and the two pressure plates (7) are respectively opposite to the fixed mold (2) and the movable mold (3) after the mold is opened, the placement cylinder (12) is fixedly sleeved with a gear (16), and the bottom of the sleeve (6) is fixedly connected with a rack (17) matched with the gear (16), and the mounting groove (11) is open on the side facing the rack (17).

5. A new hot runner injection mold device according to claim 3, characterized in that: The longitudinal section of the placement tube (12) is in the shape of a U-shaped structure, and the moving rod (13) is adapted to the placement tube (12).

6. A novel hot runner injection mold device according to claim 4, characterized in that: The rack (17) is provided with a plurality of teeth matched with the gear (16), and all of the teeth are directly opposite to the gate of the plastic product after the mold is opened.

Images