A hot runner injection molding apparatus

Abstract

The utility model relates to injection molding device technical field especially relates to a hot runner injection molding device. Its technical scheme includes: hot runner board, the top end surface of hot runner board is installed with the connecting nozzle, the bottom end surface of hot runner board is installed with injection nozzle, the front and rear ends of hot runner board are installed with water storage tank and heating box respectively, the front end surface of water storage tank is installed with booster pump, and the water storage tank is installed with drain pipe, second electric heating tube is installed in heating box. The utility model satisfies hot runner injection molding device use, and when using, the water body in water storage tank can be pressurized through booster pump, the water body after pressurization can enter hot runner board and injection nozzle and carry out water washing through drain pipe, and after water washing, the heating box can be filled with air through air pump, the gas is heated through second electric heating tube when filling with air, and the heated gas enters hot runner board and injection nozzle and carries out drying through exhaust pipe, and drying can also carry out spray cleaning simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of injection molding equipment technology, specifically to a hot runner injection molding device. Background Technology

[0002] In the field of plastic injection molding, hot runner technology ensures that the plastic in the corresponding runner and gate areas remains in a molten state by implementing heat control. Specifically, it typically involves placing heating elements such as heating rods or heating coils around or in the center of the runner, keeping the entire runner, extending from the injection molding machine nozzle outlet to the gate, in a continuously high-temperature environment, thereby maintaining the molten state of the plastic within the runner. Based on this characteristic, hot runner technology is sometimes also called a hot manifold system or runnerless molding technology.

[0003] A search revealed that patent CN221985692U discloses a hot runner injection molding device. While this device uses compressed air from a compressed air tank to enter the connecting nozzle through a connecting pipe, flushing out excess material from the hot runner plate and injection nozzle, current hot runner devices have significant limitations in the cleaning process. They rely solely on a single blowing method for cleaning, leading to easy residue of plastic material remaining inside the runner, which is difficult to remove completely. This residue can affect the quality of subsequent injection molded products and shorten the device's lifespan. Therefore, the cleaning structure of existing hot runner devices urgently needs further improvement and refinement. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hot runner injection molding device, which solves the problems mentioned in the background art.

[0005] The solution to the above-mentioned technical problems provided by this utility model is as follows:

[0006] A hot runner injection molding apparatus includes a hot runner plate, a connecting nozzle is installed on the top surface of the hot runner plate, an injection nozzle is installed on the bottom surface of the hot runner plate, and a first heating element is installed inside the hot runner plate.

[0007] A water storage tank and a heating tank are respectively installed at the front and rear ends of the hot runner plate. A booster pump is installed on the front end of the water storage tank, and a drain pipe is installed on the water storage tank.

[0008] The heating box is equipped with a second electric heating element, an exhaust pipe, and an air pump.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, a filling pipe is installed on the top surface of the water storage tank, the filling pipe is connected to the water storage tank, and a sealing cap is installed on the filling pipe by threads.

[0011] The beneficial effects of adopting the above-mentioned further solutions are:

[0012] The filling pipe provides a channel for replenishing water into the water storage tank, while the threaded sealing cap can seal the filling pipe when not filling, preventing the water in the storage tank from being contaminated by external dust and impurities.

[0013] Furthermore, a connecting pipe is installed on the booster pump, and the end of the connecting pipe facing away from the booster pump is installed in the water storage tank. The water storage tank is connected to the booster pump through the connecting pipe.

[0014] The beneficial effects of adopting the above-mentioned further solutions are:

[0015] The connecting pipe establishes a connection path between the water storage tank and the booster pump, enabling the booster pump to pressurize the water in the water storage tank through the connecting pipe, ensuring the continuity of water supply, and providing a stable power and water source guarantee for subsequent operations of supplying water to the connecting nozzle through the drain pipe.

[0016] Furthermore, the end of the drain pipe facing away from the water storage tank is installed inside the connector, the connector is connected to the water storage tank through the drain pipe, and a valve is installed on the drain pipe.

[0017] The beneficial effects of adopting the above-mentioned further solutions are:

[0018] The drain pipe directly connects the water storage tank to the connector, allowing water from the tank to be pumped into the connector for cleaning of the connector, its associated hot runner system channels, and the injection nozzle. The valve allows for flexible control of the drain pipe's flow, enabling the water supply to be opened or closed as needed.

[0019] Furthermore, the air pump is equipped with an air inlet pipe, and the end of the air inlet pipe facing away from the air pump is installed inside the heating box. The heating box is connected to the air pump through the air inlet pipe.

[0020] The beneficial effects of adopting the above-mentioned further solutions are:

[0021] The air inlet pipe connects the air pump to the heating chamber, allowing the air pump to draw in outside air and deliver it into the heating chamber, providing a sufficient air supply. This structure ensures a continuous supply of air for heating within the heating chamber, thus providing enough hot air for subsequent drying and blowing processes, ensuring the stability and reliability of the drying and blowing effects.

[0022] Furthermore, the end of the exhaust pipe facing away from the heating box is installed inside the connecting nozzle, the connecting nozzle is connected to the heating box through the exhaust pipe, and a valve is installed on the exhaust pipe.

[0023] The beneficial effects of adopting the above-mentioned further solutions are:

[0024] The exhaust pipe connects the heating chamber to the connector nozzle, allowing heated air from the heating chamber to be delivered to the connector nozzle for drying and blowing treatment of the connector nozzle, related runner channels, and injection nozzle. Valves control the delivery of hot air, adjusting the supply time as needed. Simultaneously, the blowing treatment during drying removes residual impurities or moisture from the runner channels, further improving their cleanliness and thus enhancing the quality of the injection molded products.

[0025] This invention provides a hot runner injection molding device. It has the following advantages:

[0026] The first heating element inside the hot runner plate can maintain a stable temperature inside the hot runner, ensuring that the molten material maintains good fluidity during the flow process and avoiding solidification or changes in properties due to temperature fluctuations, thus laying the foundation for high-quality injection molding.

[0027] The water system, consisting of a water tank, booster pump, and related piping, cleans the connector nozzles, hot runner channels, and injection nozzles. After injection molding, the booster pump is activated to pressurize the water in the tank. The water then drains through the drain pipe into the relevant components, removing residual molten material and preventing it from solidifying and clogging the channels. This ensures smooth operation for subsequent injections and reduces the risk of equipment malfunctions due to delayed cleaning. The design of the filling pipe and sealing cap ensures the cleanliness of the water in the tank, preventing impurities from entering the channels and causing secondary contamination.

[0028] The hot air system, consisting of a heating chamber, air pump, and supporting structures, works in conjunction with the water system for cleaning and drying. After cleaning, the air pump and the second electric heating element in the heating chamber are activated. Hot air enters each component through the exhaust pipe, not only drying residual moisture to prevent it from affecting the performance of subsequent injection molded materials, but also further removing fine impurities that were not completely removed during the cleaning process. This dual protection ensures the cleanliness of the flow channel, improves the yield of injection molded products, and avoids the impact of single-stage air blowing on cleaning and maintenance operations. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0030] In the attached diagram:

[0031] Figure 1 This is a front view schematic diagram of the present invention;

[0032] Figure 2 This is a bottom view of the present invention;

[0033] Figure 3 This is a rear view schematic diagram of the present invention;

[0034] Figure 4 This is a cross-sectional view of the present invention.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Hot runner plate; 101. First heating element; 2. Injection nozzle; 3. Connecting nozzle; 4. Water tank; 401. Filling pipe; 402. Drain pipe; 5. Booster pump; 501. Connecting pipe; 6. Heating box; 601. Exhaust pipe; 602. Second heating element; 7. Air pump; 701. Air inlet pipe. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figures 1 to 4 As shown, the embodiments provided by this utility model are as follows:

[0039] Example 1: A hot runner injection molding device includes a hot runner plate 1, a connecting nozzle 3 installed on the top surface of the hot runner plate 1, an injection nozzle 2 installed on the bottom surface of the hot runner plate 1, and a first electric heating tube 101 installed inside the hot runner plate 1.

[0040] A water storage tank 4 and a heating tank 6 are respectively installed at the front and rear ends of the hot runner plate 1. A booster pump 5 is installed on the front end of the water storage tank 4, and a drain pipe 402 is installed on the water storage tank 4.

[0041] A second electric heating tube 602 is installed inside the heating box 6, an exhaust pipe 601 is installed on the heating box 6, and an air pump 7 is installed on the rear end face of the heating box 6.

[0042] A filling pipe 401 is installed on the top surface of the water storage tank 4. The filling pipe 401 is connected to the water storage tank 4. A sealing cap is installed on the filling pipe 401 by thread. The filling pipe 401 provides a channel for replenishing water into the water storage tank 4. The sealing cap installed by thread can seal the filling pipe 401 when not filling, preventing the water in the water storage tank 4 from being contaminated by external dust and impurities.

[0043] A connecting pipe 501 is installed on the booster pump 5. The end of the connecting pipe 501 facing away from the booster pump 5 is installed in the water storage tank 4. The water storage tank 4 is connected to the booster pump 5 through the connecting pipe 501. The connecting pipe 501 establishes a communication path between the water storage tank 4 and the booster pump 5, so that the booster pump 5 can pressurize the water in the water storage tank 4 through the connecting pipe 501 to ensure the continuity of water supply. This provides a stable power and water source guarantee for the subsequent operation of supplying water to the connecting nozzle 3 through the drain pipe 402.

[0044] The end of the drain pipe 402 facing away from the water storage tank 4 is installed inside the connecting nozzle 3. The connecting nozzle 3 is connected to the water storage tank 4 via the drain pipe 402. A valve is installed on the drain pipe 402. The drain pipe 402 directly connects the water storage tank 4 and the connecting nozzle 3, allowing water in the water storage tank 4 to be delivered into the connecting nozzle 3. This enables cleaning operations on the connecting nozzle 3, the related flow channels of the connected hot runner plate 1, and the injection nozzle 2. The valve allows for flexible control of the flow of the drain pipe 402, enabling the water supply to be opened or closed as needed.

[0045] Example 2: In order to perform a drying process after washing, and to perform a blowing process simultaneously with the drying process, for example, as follows: Figures 1 to 4 As shown, this utility model also includes:

[0046] An air inlet pipe 701 is installed on the air pump 7. The end of the air inlet pipe 701 facing away from the air pump 7 is installed inside the heating chamber 6. The heating chamber 6 is connected to the air pump 7 through the air inlet pipe 701. The air inlet pipe 701 connects the air pump 7 and the heating chamber 6, allowing the air pump 7 to draw in outside air and deliver it into the heating chamber 6, providing a sufficient air source for the heating chamber 6. This structure ensures that the heating chamber 6 can continuously obtain air for heating treatment, thereby providing sufficient hot air for subsequent drying and blowing treatments, ensuring the stability and reliability of the drying and blowing effects.

[0047] The end of the exhaust pipe 601 facing away from the heating chamber 6 is installed inside the connecting nozzle 3. The connecting nozzle 3 is connected to the heating chamber 6 via the exhaust pipe 601. A valve is installed on the exhaust pipe 601. The exhaust pipe 601 connects the heating chamber 6 and the connecting nozzle 3, allowing the heated air in the heating chamber 6 to be delivered to the connecting nozzle 3 through the exhaust pipe 601. This enables the drying and blowing treatment of the connecting nozzle 3, the related flow channels of the hot runner plate 1, and the injection nozzle 2. The valve controls the delivery of hot air and allows for adjustment of the hot air supply time according to actual needs. Simultaneously, the blowing treatment during the drying process removes residual impurities or moisture from the flow channels, further improving the cleanliness of the flow channels and contributing to the improvement of the quality of the injection molded products.

[0048] Working principle: Injection molding stage:

[0049] The first heating element 101 continuously heats the hot runner plate 1, so that the molten material maintains good fluidity in the flow channel system composed of the hot runner plate 1, the connecting nozzle 3 and the injection nozzle 2.

[0050] The material enters the hot runner plate 1 from the injection molding machine through the connecting nozzle 3, and then is injected into the mold cavity through the injection nozzle 2 to complete the injection molding.

[0051] Cleaning stage:

[0052] Open the valve on drain pipe 402 and start booster pump 5.

[0053] The booster pump 5 pressurizes the water in the water storage tank 4 through the connecting pipe 501. The pressurized water is then transported to the connecting nozzle 3 through the drain pipe 402. The connecting nozzle 3 is closed during transport, allowing the water to flow sequentially through the flow channel of the hot runner plate 1 and the injection nozzle 2 to remove residual molten material.

[0054] Drying stage:

[0055] Close the valve on drain pipe 402 to stop the water supply.

[0056] Start the air pump 7 and the second electric heating element 602.

[0057] The air pump 7 draws outside air into the heating box 6 through the air inlet pipe 701, and the second electric heating tube 602 heats the air.

[0058] Open the valve on the exhaust pipe 601, and the heated hot air enters the connecting nozzle 3 through the exhaust pipe 601 to dry and blow the flow channel of the hot runner plate 1 and the injection nozzle 2, removing residual moisture and impurities.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot runner injection molding apparatus, comprising a hot runner plate (1), wherein a connecting nozzle (3) is mounted on the top surface of the hot runner plate (1), an injection nozzle (2) is mounted on the bottom surface of the hot runner plate (1), and a first heating element (101) is installed inside the hot runner plate (1), characterized in that: The front and rear ends of the hot runner plate (1) are respectively equipped with a water storage tank (4) and a heating box (6). A booster pump (5) is installed on the front end of the water storage tank (4). A drain pipe (402) is installed on the water storage tank (4). The heating box (6) is equipped with a second electric heating tube (602), the heating box (6) is equipped with an exhaust pipe (601), and the rear end face of the heating box (6) is equipped with an air pump (7).

2. The hot runner injection molding apparatus according to claim 1, characterized in that: A filling pipe (401) is installed on the top surface of the water storage tank (4). The filling pipe (401) is connected to the water storage tank (4). A sealing cap is installed on the filling pipe (401) by thread.

3. The hot runner injection molding apparatus according to claim 1, characterized in that: A connecting pipe (501) is installed on the booster pump (5). One end of the connecting pipe (501) away from the booster pump (5) is installed in the water storage tank (4). The water storage tank (4) is connected to the booster pump (5) through the connecting pipe (501).

4. The hot runner injection molding apparatus according to claim 1, characterized in that: The end of the drain pipe (402) facing away from the water storage tank (4) is installed in the connector (3). The connector (3) is connected to the water storage tank (4) through the drain pipe (402). A valve is installed on the drain pipe (402).

5. The hot runner injection molding apparatus according to claim 1, characterized in that: An air inlet pipe (701) is installed on the air pump (7). The end of the air inlet pipe (701) away from the air pump (7) is installed in the heating box (6). The heating box (6) is connected to the air pump (7) through the air inlet pipe (701).

6. The hot runner injection molding apparatus according to claim 1, characterized in that: The end of the exhaust pipe (601) facing away from the heating box (6) is installed in the connecting nozzle (3). The connecting nozzle (3) is connected to the heating box (6) through the exhaust pipe (601). A valve is installed on the exhaust pipe (601).

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