Hot runner with good heat dissipation effect

Abstract

The utility model discloses a hot runner with a good heat dissipation effect, which comprises a hot runner plate, a main nozzle arranged at the top of the hot runner plate, a nozzle arranged at the bottom of the hot runner plate, a water cooling mechanism arranged in the hot runner plate, a dehumidifying mechanism arranged at the upper end of the hot runner, and a water cooling mechanism comprising a water flow channel, a radiator and a joint, a water outlet is formed in the upper end of the water flow channel, a water inlet is formed in the lower end of the water flow channel, the radiator is detachably installed in the water flow channel, internal threads are arranged on the inner end faces of the water inlet and the water outlet of the connector, and the connector is installed in the water inlet and the water outlet through the threads. The water cooling mechanism is arranged in the hot runner plate to cool the hot runner plate, so that continuous temperature rise of materials in the hot runner plate caused by heat accumulation in the hot runner plate is avoided, the product quality is improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding equipment, in particular to a hot runner with good heat dissipation effect. Background Art

[0002] Hot runner molds are currently commonly used plastic material injection molding molds. Compared with molds with cold runner structures, hot runner molds have the advantages of saving raw materials, shortening part molding cycle, reducing waste, improving product quality, eliminating subsequent processes, and facilitating production automation.

[0003] The existing hot runner has poor heat dissipation effect, which leads to heat accumulation in the hot runner, causing the raw material temperature to continue to rise. Too high a temperature may cause excessive melting of the plastic, break the molecular chain, affect the performance of the product, and even cause thermal decomposition to produce harmful gases. Excessive temperature will accelerate equipment wear and shorten the life of parts. It may also cause the plastic to burn and adhere to the surface of the hot runner, forming carbides to block the runner, and in severe cases, damage the hot runner components. Therefore, a hot runner with good heat dissipation effect is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a hot runner with good heat dissipation effect, which has the advantage of good heat dissipation effect and solves the problem in the prior art that the heat dissipation effect of the hot runner is too poor, resulting in continuous heating of internal raw materials, affecting product quality and equipment service life.

[0005] To achieve the above object, the utility model provides the following technical solutions: a hot runner with good heat dissipation effect, comprising a hot runner plate, a main nozzle is arranged on the top of the hot runner plate, a nozzle is arranged on the bottom of the hot runner plate, a water cooling mechanism is arranged inside the hot runner plate, and a dehumidification mechanism is arranged on the upper end of the hot runner;

[0006] The water cooling mechanism includes a water flow channel, a radiator and a joint. The upper end of the water flow channel is provided with a water outlet, and the lower end of the water flow channel is provided with a water inlet. The radiator is detachably installed in the water flow channel. The inner end surfaces of the water inlet and the water outlet of the joint are provided with internal threads, and the joint is installed in the water inlet and the water outlet through threads.

[0007] As a preferred hot runner with good heat dissipation effect of the utility model, the water flow channel is a "U"-shaped through hole, and water flow channels are arranged on both sides of the hot runner plate.

[0008] As a preferred hot runner with good heat dissipation effect of the utility model, the radiator includes a positioning plate and a heat exchange plate, the positioning plate is a "cross" shaped structure, the heat exchange plate is a regular hexagonal structure, the side wall of the water flow channel is provided with a positioning groove, the positioning plate is inserted into the positioning groove and is slidably connected to the hot runner plate.

[0009] As a preferred hot runner with good heat dissipation effect of the utility model, the side wall of the heat exchange plate is provided with honeycomb-shaped through holes.

[0010] As a preferred hot runner with good heat dissipation effect of the utility model, a filter screen is arranged in the water inlet.

[0011] As a preferred hot runner with good heat dissipation effect of the utility model, the dehumidification mechanism includes a drying box and a desiccant, the side wall of the drying box is provided with a sliding bar, the top of the hot runner plate is provided with a sliding rail, and the drying box and the hot runner plate are slidably connected through the sliding bar and the sliding rail.

[0012] As a preferred hot runner with good heat dissipation effect of the utility model, the upper end surface of the drying box is a "V"-shaped structure.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model dissipates heat from the hot runner plate by arranging a water cooling mechanism inside the hot runner plate, thereby avoiding heat accumulation in the hot runner plate and causing the material in the hot runner plate to continue to heat up, thereby improving product quality and the service life of the equipment.

[0015] 2. The utility model sets a dehumidification mechanism on the upper end surface of the hot runner plate. The desiccant can absorb moisture in the environment and effectively prevent condensation, thereby protecting the equipment from corrosion. The application of desiccant helps to keep the inside and surrounding environment of the equipment dry, enhance the stability and safety of insulating materials, reduce the equipment failure rate caused by moisture, thereby reducing the number of maintenance times and costs, and indirectly improving the working efficiency and economic benefits of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is an exploded view of the utility model;

[0018] Figure 3 It is a front cross-sectional view of the utility model;

[0019] Figure 4 This is a schematic diagram of the matching state of the heat sink and the hot runner plate of the utility model;

[0020] Figure 5 For the utility model Figure 4 Enlarged view of point A in the middle.

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the drying box of the present utility model.

[0022] In the figure: 1. hot runner plate; 101. main nozzle; 102. nozzle; 103. slide rail; 2. water cooling mechanism; 210. water flow channel; 211. positioning groove; 212. water inlet; 213. water outlet; 220. radiator; 221. positioning plate; 222. heat exchange plate; 223. through hole; 230. joint; 240. filter; 3. dehumidification mechanism; 301. drying box; 302. desiccant; 303. slide bar. DETAILED DESCRIPTION

[0023] See also Figure 1-Figure 6 A hot runner with good heat dissipation effect comprises a hot runner plate 1, a main nozzle 101 is arranged on the top of the hot runner plate 1, a nozzle 102 is arranged on the bottom of the hot runner plate 1, a water cooling mechanism 2 is arranged in the hot runner plate 1, and a dehumidification mechanism 3 is arranged on the upper end of the hot runner;

[0024] The water cooling mechanism 2 includes a water flow channel 210, a radiator 220 and a joint 230. A water outlet 213 is provided at the upper end of the water flow channel 210, and a water inlet 212 is provided at the lower end of the water flow channel 210. The radiator 220 is detachably installed in the water flow channel 210. The inner end surfaces of the water inlet 212 and the water outlet 213 of the joint 230 are provided with internal threads, and the joint 230 is installed in the water inlet 212 and the water outlet 213 through threads.

[0025] When the device is in use, the water inlet 212 is connected to an external refrigerant supply device, the water outlet 213 is connected to an external refrigerant recovery device, and the refrigerant is circulated and pumped into the water flow channel 210 to dissipate heat and cool the hot runner plate 1. The heat in the hot runner plate 1 is transferred to the radiator 220, and heat is exchanged with the refrigerant through the radiator 220, thereby avoiding the material temperature in the hot runner plate 1 from being too high, affecting product performance or aggravating equipment wear, and continuously absorbing moisture in the air around the hot runner plate 1 through the desiccant 302 in the drying box 301, thereby avoiding the generation of water mist on the surface of the hot runner plate 1, thereby improving the stability of the equipment.

[0026] Furthermore, the water flow channel 210 is a “U”-shaped through hole 223 , and the water flow channel 210 is disposed on both the left and right sides of the hot runner plate 1 .

[0027] The two groups of water flow channels 210 dissipate heat for the hot runner plate 1, making the heat dissipation more uniform.

[0028] Furthermore, the radiator 220 includes a positioning plate 221 and a heat exchange plate 222. The positioning plate 221 is a "cross" shaped structure, and the heat exchange plate 222 is a regular hexagonal structure. The side wall of the water flow channel 210 is provided with a positioning groove 211. The positioning plate 221 is inserted into the positioning groove 211 and is slidably connected with the hot runner plate 1.

[0029] It is inevitable that the heat exchanger will corrode or accumulate scale in hot water. The sliding connection installation method allows the radiator 220 to be removed for rust removal or replaced with a new heat exchanger after it corrodes. The hexagonal heat exchange plate 222 structure greatly increases the contact area between the hot runner plate 1 and the cooling water, thereby improving the heat dissipation efficiency.

[0030] Furthermore, the side wall of the heat exchange plate 222 is provided with honeycomb-shaped through holes 223 .

[0031] The through holes 223 increase the contact area between the heat exchange plate 222 and the cooling water, and at the same time enhance the water flow effect around the heat exchanger to avoid bubbles that affect heat dissipation.

[0032] Furthermore, a filter screen 240 is disposed in the water inlet 212 .

[0033] The filter screen 240 intercepts impurities in the water to prevent small particles in the cooling water from entering the flow channel and causing blockage of the flow channel.

[0034] Furthermore, the dehumidification mechanism 3 includes a drying box 301 and a desiccant 302 . The side wall of the drying box 301 is provided with a slide bar 303 . The top of the hot runner plate 1 is provided with a slide rail 103 . The drying box 301 and the hot runner plate 1 are slidably connected through the slide bar 303 and the slide rail 103 .

[0035] Water cooling causes a certain temperature difference between the surface of the hot runner plate 1 and the air. If the air humidity is too high, it is easy to cause water mist to appear on the surface of the hot runner plate 1, thereby corroding the hot runner plate 1. Therefore, a drying mechanism is required to dehumidify it.

[0036] Furthermore, the upper end surface of the drying box 301 is a "V"-shaped structure.

[0037] The contact area between the desiccant 302 and the air is increased to improve the drying effect.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hot runner with good heat dissipation effect, comprising a hot runner plate (1), wherein a main nozzle (101) is arranged at the top of the hot runner plate (1), and a nozzle (102) is arranged at the bottom of the hot runner plate (1), characterized in that: A water cooling mechanism (2) is provided inside the hot runner plate (1), and a dehumidification mechanism (3) is provided at the upper end of the hot runner; The water cooling mechanism (2) comprises a water flow channel (210), a radiator (220) and a joint (230); a water outlet (213) is provided at the upper end of the water flow channel (210); a water inlet (212) is provided at the lower end of the water flow channel (210); the radiator (220) is detachably mounted in the water flow channel (210); inner end surfaces of the water inlet (212) and the water outlet (213) of the joint (230) are provided with internal threads; and the joint (230) is mounted in the water inlet (212) and the water outlet (213) via threads.

2. A hot runner with good heat dissipation effect according to claim 1, characterized in that: The water flow channel (210) is a "U"-shaped through hole (223), and the water flow channel (210) is provided on both the left and right sides of the hot runner plate (1).

3. A hot runner with good heat dissipation effect according to claim 1, characterized in that: The radiator (220) comprises a positioning plate (221) and a heat exchange plate (222); the positioning plate (221) is a "cross"-shaped structure, and the heat exchange plate (222) is a regular hexagonal structure; a positioning groove (211) is provided on the side wall of the water flow channel (210); the positioning plate (221) is inserted into the positioning groove (211) and is slidably connected to the hot runner plate (1).

4. A hot runner with good heat dissipation effect according to claim 3, characterized in that: The side wall of the heat exchange plate (222) is provided with honeycomb-shaped through holes (223).

5. A hot runner with good heat dissipation effect according to claim 1, characterized in that: A filter screen (240) is provided in the water inlet (212).

6. A hot runner with good heat dissipation effect according to claim 1, characterized in that: The dehumidification mechanism (3) comprises a drying box (301) and a desiccant (302); a sliding bar (303) is provided on a side wall of the drying box (301); a sliding rail (103) is provided on the top of the hot runner plate (1); and the drying box (301) and the hot runner plate (1) are slidably connected via the sliding bar (303) and the sliding rail (103).

7. A hot runner with good heat dissipation effect according to claim 6, characterized in that: The upper end surface of the drying box (301) is a "V"-shaped structure.

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