A rapid cooling and heating mold temperature controller

Abstract

This utility model discloses a rapid heating and cooling mold temperature controller, relating to the field of injection molding technology, which solves the problem of uneven heating and cooling around the cavity of an injection mold, affecting the product molding quality. It includes: a temperature-controlled flow channel disposed within the male and female mold cores, and arranged along the extension trajectory of the cavity; a heating device for heating the temperature-controlled medium to form high-temperature steam, which is then introduced into the temperature-controlled flow channel through connecting pipes, and the high-temperature steam in the temperature-controlled flow channel can flow back to the heating device through connecting pipes; and a storage tank for storing cooling medium, which is also introduced into the temperature-controlled flow channel through connecting pipes, and the cooling medium in the temperature-controlled flow channel can flow back to the storage tank through connecting pipes. This mold temperature controller can rapidly heat and cool the male and female mold cores within the injection mold to eliminate marks on the product surface.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to a rapid cooling and heating mold temperature controller. Background Technology

[0002] Injection-molded products are formed using injection molds. An injection mold contains a male mold core and a female mold core, forming a cavity between them for product molding. Due to uneven temperature distribution within the injection mold, marks can easily form on the product surface corresponding to the locations between the male and female mold cores during molding, affecting the product's surface quality. Therefore, it is necessary to control the temperature of the injection mold during injection molding to eliminate these marks.

[0003] The current standard practice is to control the mold temperature using a mold temperature controller. The existing practice in the market involves using a mold temperature controller to heat or cool the entire injection mold. However, due to the complex internal structure of the injection mold and the varying thermal conductivity of different parts, uneven heating and cooling can occur around the cavity inside the mold, potentially leading to localized overheating or underheating, which can affect product quality. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a rapid cooling and heating mold temperature controller, which solves the problem of uneven heating and cooling around the cavity of the injection mold, affecting the product molding quality.

[0005] The technical solution of this utility model to achieve the above objectives is a rapid cooling and heating mold temperature controller for controlling the temperature of an injection mold. The injection mold has a male mold core and a female mold core, and a cavity for product molding is formed between the male mold core and the female mold core. The controller includes:

[0006] Temperature control channel, wherein the temperature control channel is disposed in the male mold core and the female mold core, and the temperature control channel is arranged along the extension trajectory of the cavity;

[0007] A heating device is used to heat a temperature-controlled medium to form high-temperature steam, and to introduce the high-temperature steam into the temperature-controlled flow channel through a connecting pipe. The high-temperature steam in the temperature-controlled flow channel can flow back into the heating device through the connecting pipe.

[0008] A liquid storage tank is used to store cooling medium and to introduce the cooling medium into the temperature control channel through a connecting pipe. The cooling medium in the temperature control channel can flow back into the liquid storage tank through the connecting pipe.

[0009] Preferably, the vertical distance between any point in the temperature control channel and the corresponding point on the cavity is equal.

[0010] Preferably, a tee is connected to both the inlet and outlet of the temperature-controlled flow channel. The outlets of the heating device and the liquid storage tank are respectively connected to the tee at the inlet of the temperature-controlled flow channel via pipes, and the inlets of the heating device and the liquid storage tank are respectively connected to the tee at the outlet of the temperature-controlled flow channel via pipes, thus forming a heating circuit and a cooling circuit, respectively.

[0011] Preferably, valves are installed on the connecting pipes between the inlet and outlet of the heating device and the liquid storage tank and the tee.

[0012] Preferably, the liquid storage tank is connected to a water supply pipe, and the water supply pipe is connected to an external water source.

[0013] Preferably, a pressure pump is installed in the liquid storage tank, and the pressure pump is connected to the heating device through a pipeline.

[0014] Preferably, the heating device is located on the inside or outside of the liquid storage tank.

[0015] Its advantages over existing technologies are:

[0016] This invention relates to a mold temperature controller that rapidly heats and cools the male and female mold cores within an injection mold. Temperature-controlled flow channels are installed within the male and female mold cores, extending along the cavity's trajectory. Hot and cold media are injected into these channels to control the temperature of the mold cores, thus heating or cooling the product. Specifically, a heating device heats the temperature-controlled media to form high-temperature steam. This steam is then piped into the temperature-controlled flow channels, heating the mold cores to a set temperature. The high temperature softens the vitreous body, eliminating marks on the plastic product's surface. The high-temperature steam can then be piped back to the heating device for reuse. Similarly, cooling media from a storage tank is piped into the temperature-controlled flow channels to rapidly cool the product for mold opening. This process also enhances the surface hardness, scratch resistance, and gloss of the product. Finally, the cooling media is piped back to the storage tank for reuse. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the injection mold structure;

[0018] Figure 2 This is a schematic diagram of the structure when a rapid cooling and heating mold temperature controller is connected to an injection mold.

[0019] In the diagram, 1 is the heating device; 2 is the liquid storage tank; 3 is the pressure pump; 4 is the injection mold; 41 is the upper mold plate; 42 is the lower mold plate; 5 is the tee; 6 is the valve; and 7 is the water supply pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] like Figures 1-2 As shown, a preferred embodiment of this utility model proposes a rapid heating and cooling mold temperature controller for heating or cooling the male mold core and female mold core inside the injection mold 4.

[0022] refer to Figure 1 The injection mold 4 has an upper mold plate 41 and a lower mold plate 42. A male mold core and a female mold core (not shown in the figure) are respectively provided between the upper mold plate 41 and the lower mold plate 42. Grooves are formed on the opposite surfaces of the male mold core and the female mold core. When the male mold core and the female mold core are fitted together, a cavity can be formed between them. The shape of the cavity is consistent with the shape of the product. Glue is injected into the cavity, and the product is formed after cooling.

[0023] refer to Figure 2 The mold temperature controller mainly consists of a temperature control channel (not shown in the figure), a heating device 1, and a liquid storage tank 2. The temperature control channel is located inside the male mold core and the female mold core and is arranged along the extension trajectory of the cavity. That is to say, by injecting a temperature control medium into the temperature control channel, the male mold core and the female mold core are heated or cooled, and the temperature of the male mold core and the female mold core is directly controlled. The temperature control is more precise and there is no need to heat or cool the entire injection mold 4.

[0024] In this embodiment, the corresponding part of the cavity is bent, and the corresponding part of the temperature control channel is also bent, so that the vertical distance between any point on the temperature control channel and the corresponding position on the cavity is consistent. In this way, when the medium in the temperature control channel heats or cools the glue in the cavity, the heating is more uniform and the temperature control is more precise.

[0025] The distance between the temperature-controlled runner inside the mold and the product inside the cavity is 6mm, and the shape of the extension trajectory of the temperature-controlled runner matches the shape of the product.

[0026] The liquid storage tank 2 is used to store cooling water as a cooling medium for cooling the male and female mold cores. Tap water can be used, which is readily available.

[0027] Heating device 1 is a heating furnace, which is used to heat cold water to a set temperature to form hot steam. The hot steam is used as a heat medium to heat the male mold core and the female mold core.

[0028] like Figure 2As shown, in this embodiment, a pressure pump 3 is installed inside the liquid storage tank 2, and the heating furnace is also installed inside the liquid storage tank 2. The input end of the pressure pump 3 is connected to the inside of the liquid storage tank 2, and the output end is connected to the heating furnace through a pipe. The pressure pump 3 pumps the tap water inside the liquid storage tank 2 into the heating furnace, which then heats the tap water to form high-temperature steam. The outside of the heating furnace has a heat insulation layer to insulate against temperature changes.

[0029] The pressure pump 3 is also connected to the outlet of the liquid storage tank 2 through a pipeline, and is used to pump the tap water in the liquid storage tank 2 into the temperature control channel to cool the mold.

[0030] In other technical solutions, the heating furnace can also be located outside the liquid storage tank 2, and then the pressure pump 3 is connected to the heating furnace through a pipeline. Installing the heating furnace inside the liquid storage tank 2 saves more space and facilitates transportation.

[0031] The temperature-controlled flow channel has an inlet and an outlet, each connected to a pipe. These two pipes are also connected to two tee fittings (5). The outlets of the liquid storage tank (2) and the heating furnace are connected to the tee fittings (5) at the inlet of the temperature-controlled flow channel via pipes, and the inlets of the liquid storage tank (2) and the heating furnace are connected to the tee fittings (5) at the outlet of the temperature-controlled flow channel via pipes. This forms a heating circuit and a cooling circuit, respectively.

[0032] To prevent the heating and cooling circuits from mixing, a valve 6 is installed on the pipes connecting the outlet of the liquid storage tank 2 and the heater to the tee 5, and on the pipes connecting the inlet of the liquid storage tank 2 and the heater to the tee 5, for a total of four valves 6, which are used to control the opening and closing of the corresponding pipes.

[0033] When heating of the male and female mold cores is required, the two valves 6 on the heating circuit are opened, and the two valves 6 on the cooling circuit are closed. The high-temperature steam generated in the heating furnace is transported through pipes to the temperature-controlled flow channel to heat the male and female mold cores. After heating to the set 180°C, the injection mold 4 is then filled with plastic. This high temperature reaches the temperature at which the vitreous body softens, which can eliminate marks on the surface of the plastic product.

[0034] When cooling of the male and female mold cores is required, the two valves 6 on the heating circuit are closed, and the two valves 6 on the cooling circuit are opened. Tap water in the storage tank 2 is directly pumped into the temperature-controlled flow channel via the pressure pump 3 to cool the male and female mold cores. Once the temperature drops below 30°C, the mold can be opened. Rapid cooling of the product enhances its surface hardness, making it more scratch-resistant and producing a better gloss.

[0035] Because the heating or cooling is applied directly to the male and female mold cores, the process is very fast and can save a significant amount of time. If the entire injection mold 4 were heated or cooled, the heating or cooling time would inevitably be much longer.

[0036] In order to monitor the temperature of the male mold core and the female mold core in real time, a temperature sensor (not shown in the figure) is also installed in the injection mold 4. When the temperature reaches 180°, the glue can be injected, and when it is below 90°, the mold can be opened.

[0037] In this embodiment, the liquid storage tank 2 stores 8 kg of water, allowing for heating and cooling of the mold with only a small amount of water. Simultaneously, the mold temperature controller has both heating and cooling circuits, enabling water recycling and thus saving water.

[0038] A water supply pipe 7 is also connected to one side of the liquid storage tank 2, and a valve 6 is installed on the water supply pipe 7. The water supply pipe 7 can be connected to an external water source to replenish water into the water supply tank, or it can drain the remaining water in the liquid storage tank 2.

[0039] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A rapid cooling and heating mold temperature controller for controlling the temperature of an injection mold (4), the injection mold (4) having a male mold core and a female mold core, with a cavity for product molding formed between the male mold core and the female mold core, characterized in that, include: Temperature control channel, wherein the temperature control channel is disposed in the male mold core and the female mold core, and the temperature control channel is arranged along the extension trajectory of the cavity; Heating device (1), the heating device (1) is used to heat the temperature control medium to form high temperature steam, and the high temperature steam is introduced into the temperature control channel through the connecting pipe, and the high temperature steam in the temperature control channel can flow back to the heating device (1) through the connecting pipe. The liquid storage tank (2) is used to store the cooling medium and to pass the cooling medium into the temperature control channel through the connecting pipe. The cooling medium in the temperature control channel can flow back into the liquid storage tank (2) through the connecting pipe.

2. The rapid cooling and heating mold temperature controller according to claim 1, characterized in that, The vertical distance between any point in the temperature-controlled flow channel and the corresponding point on the cavity is equal.

3. A rapid cooling and heating mold temperature controller according to claim 1, characterized in that, The inlet and outlet of the temperature control channel are both connected to a tee (5). The outlets of the heating device (1) and the liquid storage tank (2) are respectively connected to the tee (5) at the inlet of the temperature control channel through pipes. The inlets of the heating device (1) and the liquid storage tank (2) are respectively connected to the tee (5) at the outlet of the temperature control channel through pipes, forming a heating circuit and a cooling circuit respectively.

4. A rapid cooling and heating mold temperature controller according to claim 3, characterized in that, Valves (6) are installed on the connecting pipes between the inlet and outlet of the heating device (1) and the liquid storage tank (2) and the tee (5).

5. A rapid cooling and heating mold temperature controller according to claim 1, characterized in that, The liquid storage tank (2) is connected to a water supply pipe (7), which is connected to an external water source.

6. A rapid cooling and heating mold temperature controller according to claim 1, characterized in that, The liquid storage tank (2) is equipped with a pressure pump (3), which is connected to the heating device (1) through a pipeline.

7. A rapid cooling and heating mold temperature controller according to claim 6, characterized in that, The heating device (1) is located inside or outside the liquid storage tank (2).

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