Charging barrel temperature control device and bakelite injection molding machine
By installing an oil jacket and heating coil on the outer periphery of the barrel of a bakelite injection molding machine, combined with a cooling circuit and a temperature sensor, dynamic control of the barrel temperature is achieved, solving the problem of temperature fluctuation and improving the temperature control accuracy and stability of plastic products.
Patent Information
- Application Number
- CN202423144917.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The barrel temperature control of existing bakelite injection molding machines has a lag, resulting in temperature fluctuations of approximately ±5℃, which affects the quality stability of plastic products.
By combining an oil jacket and a heating coil, the cooling medium is controlled to flow in the flow channel through a cooling circuit, thereby achieving dynamic temperature control of the barrel. Combined with the heat transfer from the heating coil and the oil jacket, the barrel temperature is precisely adjusted.
This system stabilizes the barrel temperature fluctuation within approximately ±0.3℃, improving temperature control accuracy and ensuring the quality stability of plastic products.
Smart Images
Figure CN223644206U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molding equipment technology, and in particular to a barrel temperature control device and a bakelite injection molding machine. Background Technology
[0002] Currently, most bakelite injection molding machines on the market use an external oil temperature controller for barrel temperature control. The principle is that the oil temperature controller controls the temperature of the heat-conducting oil, which then flows through a heat-conducting sleeve fitted into the barrel, allowing heat transfer between the oil and the barrel to indirectly control the barrel temperature. However, because the barrel contains a screw that propels the plastic material forward, the screw generates significant frictional and shear heat during its reciprocating motion. Furthermore, the molding die also requires heating during operation; when the bakelite injection molding machine is working normally, the nozzle end of the barrel comes into contact with the molding die, causing heat from the molding die to be transferred to the barrel. In other words, the barrel temperature is affected not only by the oil temperature controller but also by the screw movement and the heat from the molding die. Under these circumstances, relying solely on the oil temperature controller for indirect barrel temperature control results in a temperature control lag, causing periodic fluctuations in the barrel temperature. Experimental results show that these fluctuations are approximately ±5℃, leading to poor quality stability of the plastic products.
[0003] It should be noted that the above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is prior art. Utility Model Content
[0004] The main purpose of this invention is to provide a barrel temperature control device and a bakelite injection molding machine, which aims to effectively improve the temperature control accuracy of the barrel, thereby ensuring the quality stability of plastic products.
[0005] To achieve the above objectives, this utility model proposes a barrel temperature control device, including a barrel body;
[0006] Specifically, the barrel temperature control device includes:
[0007] An oil jacket is disposed on the outer periphery of the barrel body, and the oil jacket has a flow channel inside for the flow of cooling medium.
[0008] A heating coil is installed on the outer periphery of the oil sleeve, and the heat generated by the heating coil is transferred to the barrel body through the oil sleeve.
[0009] The cooling circuit is connected to the flow channel of the oil jacket and supplies cooling medium to the flow channel.
[0010] In one embodiment, the barrel temperature control device includes a first temperature sensor, the measuring end of which is connected to the oil jacket, and the first temperature sensor is used to measure the real-time temperature value of the oil jacket; the first temperature sensor is electrically connected to the cooling circuit.
[0011] In one embodiment, the heating coil has a heating element inside; specifically, the heating element includes an electric heating coil.
[0012] In one embodiment, the oil sleeve has a plurality of flow channels inside, each flow channel having a straight structure, and the plurality of flow channels are distributed at equal intervals along the circumference of the oil sleeve.
[0013] In one embodiment, the oil sleeve is made of aluminum alloy.
[0014] In one embodiment, the cooling circuit includes an oil tank, with the oil inlet connected to a first port of the flow channel and the oil outlet connected to a second port of the flow channel, wherein an oil pump is provided at the oil outlet of the oil tank; a cooler is provided in the oil tank for cooling the cooling medium in the oil tank.
[0015] In one embodiment, the cooler is provided with an inlet and an outlet for refrigerant flow, so that the refrigerant and the cooling medium can exchange heat; the outlet of the cooler is provided with an electromagnetic valve.
[0016] In one embodiment, the cooling circuit includes a second temperature sensor, the measuring end of which is disposed inside the oil tank, and the second temperature sensor is used to measure the real-time temperature value of the cooling medium; the second temperature sensor is electrically connected to the solenoid valve.
[0017] In one embodiment, a set of the oil jacket and the heating coil are defined as a temperature control combination ring. The barrel temperature control device includes several sets of the temperature control combination rings, which are spaced apart along the axis of the barrel body. The several sets of temperature control combination rings share a set of cooling circuits.
[0018] To achieve the above objectives, this utility model also proposes a bakelite injection molding machine, which includes the barrel temperature control device described in any of the above claims.
[0019] The technical solution of this utility model involves installing an oil jacket and a heating coil together on the outer periphery of the barrel body. When the real-time temperature of the barrel body is higher than the preset temperature, the cooling medium is cooled through a cooling circuit. This allows the cooling medium to exchange heat with the oil jacket as it flows through the flow channel, thus cooling the oil jacket. Furthermore, because the oil jacket is located on the outer periphery of the barrel body, it exchanges heat with the barrel body, achieving the purpose of cooling the barrel body. During this process, based on the real-time temperature of the barrel body, the heat generated by the heating coil is transferred through the oil jacket to the barrel body to heat it, replenishing the excess heat carried away by the cooling medium and preventing the real-time temperature of the barrel body from falling below the temperature required for normal operation of the bakelite injection molding machine. The aforementioned barrel body temperature control system uses a combination of heating coils and oil jackets to dynamically control the temperature of the barrel body. This means that the cooling and heating of the barrel body are carried out simultaneously, which enables more precise temperature control. Experimental results show that after adopting the above technical solution, the temperature fluctuation of the barrel body is stabilized at around ±0.3℃, thereby effectively improving the temperature control accuracy of the barrel body and ensuring the quality stability of plastic products. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A schematic diagram of the overall structure of an embodiment of the barrel temperature control device provided by this utility model;
[0022] Figure 2 A schematic diagram of the structure of the temperature control combination ring in one embodiment of the barrel temperature control device provided by this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 100. Barrel body;
[0025] 200. Temperature control assembly ring; 210. Oil sleeve; 211. Flow channel; 220. Heating coil; 230. First temperature sensor;
[0026] 300. Cooling circuit; 310. Oil tank; 320. Oil pump; 330. Cooler; 340. Solenoid valve; 350. Second temperature sensor;
[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0030] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0031] Currently, most bakelite injection molding machines on the market use an external oil temperature controller for barrel temperature control. The principle is that the oil temperature controller controls the temperature of the heat-conducting oil, which then flows through a heat-conducting sleeve fitted into the barrel, allowing heat transfer between the oil and the barrel to indirectly control the barrel temperature. However, because the barrel contains a screw that propels the plastic material forward, the screw generates significant frictional and shear heat during its reciprocating motion. Furthermore, the molding die also requires heating during operation; when the bakelite injection molding machine is working normally, the nozzle end of the barrel comes into contact with the molding die, causing heat from the molding die to be transferred to the barrel. In other words, the barrel temperature is affected not only by the oil temperature controller but also by the screw movement and the heat from the molding die. Under these circumstances, relying solely on the oil temperature controller for indirect barrel temperature control results in a temperature control lag, causing periodic fluctuations in the barrel temperature. Experimental results show that these fluctuations are approximately ±5℃, leading to poor quality stability of the plastic products.
[0032] To solve the above-mentioned technical problems, this utility model proposes a barrel temperature control device.
[0033] Please see Figure 1-2 In one embodiment of the present invention, the barrel temperature control device includes a barrel body 100;
[0034] Specifically, the barrel temperature control device includes:
[0035] An oil jacket 210 is disposed on the outer periphery of the barrel body 100, and a flow channel 211 for supplying cooling medium is provided inside the oil jacket 210.
[0036] Heating coil 220 is installed on the outer periphery of oil sleeve 210. The heat generated by heating coil 220 is transferred to barrel body 100 through oil sleeve 210.
[0037] The cooling circuit 300 is connected to the flow channel 211 of the oil jacket 210 and supplies cooling medium to the flow channel 211.
[0038] The technical solution of this utility model involves combining an oil sleeve 210 and a heating coil 220 and installing them on the outer periphery of the barrel body 100. When the real-time temperature of the barrel body 100 is higher than a preset temperature, the cooling medium is cooled through the cooling circuit 300. This allows the cooling medium to exchange heat with the oil sleeve 210 as it flows through the flow channel 211, thus cooling the oil sleeve 210. Furthermore, since the oil sleeve 210 is fitted onto the barrel body 100, heat exchange occurs between the oil sleeve 210 and the barrel body 100, achieving the purpose of cooling the barrel body 100. During this process, based on the real-time temperature of the barrel body 100, the heat generated by the heating coil 220 is transferred through the oil sleeve 210 to the barrel body 100 to heat it, replenishing the excessive heat carried away by the cooling medium and preventing the real-time temperature of the barrel body 100 from falling below the required temperature for normal operation of the bakelite injection molding machine. The temperature control system of the aforementioned barrel body 100 uses a combination of heating coil 220 and oil jacket 210 to dynamically control the temperature of the barrel body 100. That is to say, the cooling and heating of the barrel body 100 are carried out simultaneously, which can more accurately control the temperature of the barrel body 100. According to experimental results, after adopting the above technical solution, the temperature fluctuation of the barrel body 100 is stabilized at about ±0.3℃, thereby effectively improving the temperature control accuracy of the barrel body 100 and ensuring the quality stability of plastic products.
[0039] Specifically, the heating coil 220 has a heating element (not shown in the attached diagram); specifically, the heating element includes an electric heating coil. This configuration, using a commercially available electric heating coil as the heating element of the heating coil 220, achieves the purpose of heating the barrel body 100, resulting in a simple structure and strong practicality. Since electric heating coils are existing technology, this application will not elaborate on their structural principles.
[0040] Specifically, see the attached document. Figure 2 The oil jacket 210 has several flow channels 211 inside, each flow channel 211 is linear, and the flow channels 211 are evenly distributed along the circumference of the oil jacket 210. This arrangement increases the contact area between the cooling medium and the oil jacket 210, allowing the cooling medium flowing in the flow channels 211 to better exchange heat with the oil jacket 210, thereby cooling the oil jacket 210 and improving the cooling efficiency of the barrel body 100.
[0041] Furthermore, the oil jacket 210 is made of aluminum alloy. This design allows the aluminum alloy to possess a high thermal conductivity and specific heat capacity, enabling the oil jacket 210 to better serve as a temperature transfer medium for effective cooling and heating of the barrel body 100. It is understood that those skilled in the art, upon understanding the technical solution of this application, can invent other materials with high thermal conductivity and specific heat capacity to manufacture the oil jacket 210 without creative effort, and such materials should also fall within the scope of protection of this application.
[0042] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 1 The barrel temperature control device includes a first temperature sensor 230, the measuring end of which is connected to an oil jacket 210. The first temperature sensor 230 is used to measure the real-time temperature value of the oil jacket 210. The first temperature sensor 230 is electrically connected to a cooling circuit 300. With this configuration, the first temperature sensor 230 measures the real-time temperature value of the oil jacket 210. Since the oil jacket 210 and the barrel body 100 are directly connected, the real-time temperature value of the oil jacket 210 can be approximated as equal to the real-time temperature value of the barrel body 100. When the real-time temperature value of the barrel body 100 is found to be higher than a preset temperature value, the cooling medium is cooled through the cooling circuit 300 to cool the barrel body 100, ensuring the smooth implementation of the technical solution of this application.
[0043] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 1The cooling circuit 300 includes an oil tank 310. The oil inlet of the oil tank 310 is connected to the first port of the flow channel 211, and the oil outlet of the oil tank 310 is connected to the second port of the flow channel 211. An oil pump 320 is installed at the oil outlet of the oil tank 310. A cooler 330 is installed in the oil tank 310 to cool the cooling medium in the oil tank 310. With this configuration, the oil tank 310 and the oil jacket 210 form a cooling medium flow system. When the cooling medium, heated by the heat of the barrel body 100 or the heating coil 220, flows from the oil jacket 210 to the oil tank 310, the cooler 330 inside the oil tank 310 cools the cooling medium. The cooled cooling medium, driven by the oil pump 320, flows back to the oil jacket 210 to cool the oil jacket 210, thereby ensuring the smooth implementation of the technical solution of this application.
[0044] Furthermore, the cooler 330 is provided with an inlet and an outlet for refrigerant flow, enabling heat exchange between the refrigerant and the cooling medium; a solenoid valve 340 is installed at the outlet of the cooler 330. This configuration utilizes the principle of heat exchange between the refrigerant and the cooling medium to create the cooler 330, thereby achieving the purpose of cooling the cooling medium. The structure is simple and highly practical. Cooling water can be selected as the refrigerant, and this application does not impose specific limitations on it.
[0045] Furthermore, the cooling circuit 300 includes a second temperature sensor 350, the measuring end of which is located inside the oil tank 310. The second temperature sensor 350 is used to measure the real-time temperature value of the cooling medium; the second temperature sensor 350 is electrically connected to the solenoid valve 340. With this configuration, the second temperature sensor 350 monitors the real-time temperature value of the cooling medium in the oil tank 310. When the real-time temperature value of the cooling medium reaches a preset temperature value, the solenoid valve 340 is closed, thereby stopping the cooling process of the cooler 330 on the cooling medium. This design is simple and highly practical.
[0046] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 1 A set of oil sleeves 210 and heating coils 220 are defined as temperature control combination rings 200. The barrel temperature control device includes several sets of temperature control combination rings 200, which are distributed at intervals along the axis of the barrel body 100. Considering that the barrel body 100 has a certain axial length, it may be difficult to achieve effective dynamic temperature control of the barrel body 100 by relying on a single set of temperature control combination rings 200. Therefore, this embodiment sets several sets of temperature control combination rings 200. Through the joint action of several sets of temperature control combination rings 200, it is ensured that the barrel body 100 can be effectively and dynamically controlled, thereby ensuring the quality stability of the plastic products.
[0047] Further, see attached document. Figure 1 Several sets of temperature control combination rings 200 share a single cooling circuit 300. This configuration simplifies the overall structure and volume of the barrel temperature control device, reducing manufacturing costs. Furthermore, since the cooling medium in each set of temperature control combination rings 200 is uniformly cooled by the same cooling circuit 300, the temperature of the cooling medium in each set of temperature control combination rings 200 remains consistent. This prevents temperature imbalances in the barrel body 100 caused by differences in the cooling medium temperature within each set of temperature control combination rings 200, which could negatively impact the quality of the finished plastic product.
[0048] This embodiment also discloses a bakelite injection molding machine, including the barrel temperature control device of any of the above embodiments. The specific structure of the barrel temperature control device can be referred to the above embodiments. Since this bakelite injection molding machine adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.
[0049] It should be noted that the barrel temperature control device and other contents of the bakelite injection molding machine disclosed in this utility model are existing technologies and will not be described in detail here.
[0050] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any application of this utility model directly or indirectly in other related technical fields is included within the patent protection scope of this utility model.
Claims
1. A barrel temperature control device, comprising a barrel body; characterized in that, The barrel temperature control device includes: An oil jacket is disposed on the outer periphery of the barrel body, and the oil jacket has a flow channel inside for the flow of cooling medium. A heating coil is installed on the outer periphery of the oil sleeve, and the heat generated by the heating coil is transferred to the barrel body through the oil sleeve. The cooling circuit is connected to the flow channel of the oil jacket and supplies cooling medium to the flow channel.
2. The barrel temperature control device as described in claim 1, characterized in that: The barrel temperature control device includes a first temperature sensor, the measuring end of which is connected to the oil jacket, and the first temperature sensor is used to measure the real-time temperature value of the oil jacket; the first temperature sensor is electrically connected to the cooling circuit.
3. The barrel temperature control device as described in claim 1, characterized in that: The heating coil has a heating element inside; specifically, the heating element includes an electric heating coil.
4. The barrel temperature control device as described in claim 1, characterized in that: The oil jacket has a plurality of flow channels inside, each of which is a straight line and is distributed at equal intervals along the circumference of the oil jacket.
5. The barrel temperature control device as described in claim 1, characterized in that: The oil sleeve is made of aluminum alloy.
6. The barrel temperature control device as described in claim 1, characterized in that: The cooling circuit includes an oil tank, with the oil inlet connected to the first port of the flow channel and the oil outlet connected to the second port of the flow channel. An oil pump is installed at the oil outlet of the oil tank. A cooler is installed in the oil tank to cool the cooling medium in the oil tank.
7. The barrel temperature control device as described in claim 6, characterized in that: The cooler is provided with an inlet and an outlet for refrigerant flow, so that the refrigerant and the cooling medium can exchange heat; the outlet of the cooler is provided with an electromagnetic valve.
8. The barrel temperature control device as described in claim 7, characterized in that: The cooling circuit includes a second temperature sensor, the measuring end of which is located inside the oil tank. The second temperature sensor is used to measure the real-time temperature of the cooling medium. The second temperature sensor is electrically connected to the solenoid valve.
9. The barrel temperature control device as described in claim 1, characterized in that: A set of the oil jacket and the heating coil are defined as a temperature control combination ring. The barrel temperature control device includes several sets of the temperature control combination rings, which are distributed at intervals along the axis of the barrel body. The several sets of temperature control combination rings share a set of cooling circuits.
10. A bakelite injection molding machine, characterized in that: The bakelite injection molding machine includes a barrel temperature control device as described in any one of claims 1 to 9.