A precision temperature-controlled injection molding device

Abstract

This utility model discloses a precision temperature-controlled injection molding device, including an injection molding machine body. A feed hopper is connected to the right side of the top of the injection molding machine body. An injection screw is movably installed inside the injection molding machine body. A moving mold is fixedly installed at the left end of the injection screw. A fixed mold is located to the left of the moving mold. A temperature display is fixedly installed on the top of the fixed mold. This utility model connects the temperature display on the top of the fixed mold to an internal cavity temperature sensor, enabling real-time and accurate temperature display. Simultaneously, the rational arrangement of the liquid pump, storage tank, and flow control valve allows for precise injection of coolant into the fixed mold cavity as needed, achieving precise temperature control of the fixed mold. Inside the sealed outer shell at the bottom left end of the injection screw, a lower heating component surrounds the injection screw. Combined with the staggered upper heating component, this provides comprehensive and uniform heating of the injection screw, ensuring that the plastic raw material remains at a suitable temperature throughout the injection molding process.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a precision temperature-controlled injection molding device. Background Technology

[0002] In the injection molding process, temperature control plays a crucial role in product quality and molding effect. The right temperature allows the plastic raw material to fill the mold cavity better, reducing product defects such as shrinkage marks and bubbles. Improper temperature control may lead to poor flowability of the plastic raw material, resulting in defects such as insufficient filling and poor surface quality. At the same time, excessively high or low temperatures may also affect the molecular structure of the plastic, thereby reducing the mechanical properties and service life of the product.

[0003] Currently, many injection molding machines employ temperature control methods that have certain limitations. Some machines rely solely on simple heating elements to heat the mold and injection screw, lacking effective cooling measures. This makes it difficult to adjust the temperature in a timely manner when rapid cooling is required, and thus cannot meet the molding needs of some plastic materials that require a high rate of temperature change. Utility Model Content

[0004] The purpose of this invention is to provide a precision temperature-controlled injection molding device, which has the advantage of rapid cooling for temperature control.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a precision temperature-controlled injection molding device, comprising an injection molding machine body, a feed hopper connected to the right side of the top of the injection molding machine body, an injection screw movably installed inside the injection molding machine body, a moving mold fixedly installed at the left end of the injection screw, a fixed mold arranged on the left side of the moving mold, a temperature display fixedly installed on the top of the fixed mold, a liquid inlet channel penetrating through the outer side of the inner cavity of the fixed mold, a liquid pump connected to the top of the liquid inlet channel via a pipe, a liquid storage tank connected to the liquid inlet pipe at the bottom of the liquid pump, a flow control valve movably installed at one end of the pipe at the top of the liquid pump, a sealing shell fixedly installed at the bottom of the left end of the injection screw and located at the top of the injection molding machine body, a lower heating component fixedly installed inside the sealing shell, and the lower heating component enclosing the outside of the injection screw.

[0006] As a preferred embodiment, a reflux channel is provided at the bottom of the fixed mold cavity, and a reflux pump is connected to the top of the reflux channel via a pipe. The outlet pipe of the reflux pump is connected to the top of the storage tank.

[0007] As a preferred embodiment, a support frame is fixedly installed on the right side of the front of the injection molding machine body. The support frame is designed in a semi-rectangular shape and is wrapped around the outside of the liquid storage tank.

[0008] As a preferred embodiment, an upper heating assembly is provided above the sealed outer shell, and a sealed top cover is fixedly installed on the top of the upper heating assembly.

[0009] As a preferred embodiment, the upper heating components are arranged at equal horizontal distances and are offset from the lower heating components below.

[0010] As a preferred embodiment, the mold has an injection cavity inside, and the liquid inlet channel is distributed on the outer edge of the injection cavity. The return channel is located below the inner cavity of the injection cavity and is arranged longitudinally.

[0011] As a preferred embodiment, sealing rubber rings are provided on the opposing surfaces of the moving mold and the fixed mold, and the sealing rubber rings surround the edges of the moving mold and the fixed mold.

[0012] As a preferred embodiment, the temperature display is electrically connected to the temperature sensor installed in the mold cavity, the top of the liquid storage tank is provided with a liquid inlet, a sealing cap is snapped onto the liquid inlet, and a liquid level sensor is installed inside the liquid storage tank.

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

[0014] 1. This utility model connects a temperature display on the top of the fixed mold to an internal cavity temperature sensor, enabling real-time and accurate temperature display. The rational arrangement of the pump, reservoir, and flow control valve allows for precise injection of coolant into the fixed mold cavity as needed, achieving accurate temperature control. Inside the sealed housing at the bottom left end of the injection screw, a lower heating assembly surrounds the screw, working in conjunction with a staggered upper heating assembly to heat the screw comprehensively and evenly, ensuring the plastic material remains at a suitable temperature throughout the injection molding process. Furthermore, the return channel and return pump at the bottom of the fixed mold cavity are connected to the reservoir, enabling coolant recycling. This not only improves coolant utilization but also reduces production costs. The overall device design is rational, significantly improving the quality and production efficiency of injection-molded products.

[0015] 2. This utility model utilizes a return channel at the bottom of the fixed mold cavity, which is connected to a return pump at the top via a pipe. The outlet pipe of the return pump is connected to the top of the storage tank. This ingenious design forms a complete coolant circulation system. It can promptly pump the coolant that has risen in temperature inside the fixed mold back to the storage tank. After cooling, it can be reused. This not only effectively improves the utilization rate of coolant and reduces production costs, but also ensures the stability and continuity of fixed mold temperature control, further improving the quality of injection molded products. At the same time, a semi-rectangular support frame fixedly installed on the right side of the front of the injection molding machine body tightly wraps around the outside of the storage tank, providing stable support for the storage tank and enhancing the structural stability of the entire device. Attached Figure Description

[0016] Figure 1 This is a first-person perspective structural perspective view of the present invention;

[0017] Figure 2 This is a second-view perspective structural perspective view of the present invention;

[0018] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0019] Figure 4 This is a partial structural cross-sectional view of the present invention from another perspective.

[0020] In the diagram: 1. Injection molding machine body; 2. Feed hopper; 3. Injection screw; 4. Moving mold; 5. Fixed mold; 6. Temperature display; 7. Liquid inlet channel; 8. Return channel; 9. Liquid storage tank; 10. Liquid pump; 11. Return pump; 12. Flow control valve; 13. Support frame; 14. Sealed outer shell; 15. Lower heating assembly; 16. Upper heating assembly; 17. Sealed top cover. Detailed Implementation

[0021] 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.

[0022] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0023] Example 1:

[0024] Please see Figure 1As shown, this utility model provides a precision temperature-controlled injection molding device, including an injection molding machine body 1. A feed hopper 2 is connected to the right side of the top of the injection molding machine body 1. An injection screw 3 is movably installed inside the injection molding machine body 1. A moving mold 4 is fixedly installed at the left end of the injection screw 3. A fixed mold 5 is arranged on the left side of the moving mold 4. A temperature display 6 is fixedly installed on the top of the fixed mold 5. A liquid inlet channel 7 is opened through the outside of the inner cavity of the fixed mold 5. A liquid pump 10 is connected to the top of the liquid inlet channel 7 through a pipe. A liquid storage tank 9 is connected to the liquid inlet pipe at the bottom of the liquid pump 10. A flow control valve 12 is movably installed at one end of the pipe at the top of the liquid pump 10. A sealing shell 14 is fixedly installed at the bottom of the left end of the injection screw 3 and at the top of the injection molding machine body 1. A lower heating component 15 is fixedly installed inside the sealing shell 14 and is wrapped around the outside of the injection screw 3.

[0025] This technical solution connects the temperature display 6 on the top of the fixed mold 5 to the internal cavity temperature sensor, enabling real-time and accurate temperature display. The rational arrangement of the pump 10, storage tank 9, and flow control valve 12 allows for precise injection of coolant into the cavity of the fixed mold 5 as needed, achieving accurate temperature control. Inside the sealed housing 14 at the bottom left of the injection screw 3, the lower heating assembly 15 encloses the outside of the injection screw 3, working in conjunction with the staggered upper heating assembly 16 to heat the injection screw 3 comprehensively and evenly, ensuring the plastic material remains at a suitable temperature throughout the injection molding process. Furthermore, the return channel 8 and return pump 11 at the bottom of the fixed mold 5 cavity are connected to the storage tank 9, enabling coolant recycling. This not only improves coolant utilization but also reduces production costs. The overall device structure is rationally designed, significantly improving the quality and production efficiency of injection molded products.

[0026] Example 2:

[0027] Based on Embodiment 1, this utility model is as follows: Figure 3 As shown, a return channel 8 is provided at the bottom of the inner cavity of the fixed mold 5. The top of the return channel 8 is connected to a return pump 11 through a pipe. The outlet pipe of the return pump 11 is connected to the top of the liquid storage tank 9. A support frame 13 is fixedly installed on the right side of the front of the injection molding machine body 1. The support frame 13 is designed in a semi-rectangular shape and is wrapped around the outside of the liquid storage tank 9.

[0028] Adopting such Figure 1The technical solution shown has a return channel 8 at the bottom of the inner cavity of the fixed mold 5 connected to the return pump 11 at the top via a pipe. The outlet pipe of the return pump 11 is connected to the top of the storage tank 9. This ingenious design forms a complete coolant circulation system, which can promptly pump the coolant that has risen in temperature inside the fixed mold 5 back to the storage tank 9. After cooling, it can be reused. This not only effectively improves the utilization rate of coolant and reduces production costs, but also ensures the stability and continuity of temperature control of the fixed mold 5, further improving the quality of injection molded products. At the same time, the semi-rectangular support frame 13 fixedly installed on the right side of the front of the injection molding machine body 1 tightly wraps around the outside of the storage tank 9, providing a stable support for the storage tank 9 and enhancing the structural stability of the entire device.

[0029] Secondly, in the technical solution, an upper heating component 16 is provided above the sealed outer shell 14, and a sealed top cover 17 is fixedly installed on the top of the upper heating component 16; the upper heating component 16 is arranged horizontally at equal distances and is offset from the lower heating component 15 below.

[0030] Its adoption is as follows Figure 1 The technical solution shown effectively prevents heat loss, improves heating efficiency, and reduces energy consumption. Furthermore, the sealed top cover 17 provides excellent protection for the upper heating component 16, preventing external impurities and dust from entering and extending its service life. The upper heating components 16 are arranged horizontally at equal intervals and staggered with the lower heating components 15 below. This unique layout allows the injection screw 3 to be heated more evenly and comprehensively. During injection molding, the plastic raw material is heated more stably and consistently within the injection screw 3, effectively avoiding problems such as poor plasticization caused by uneven local temperatures. This not only improves the plasticization quality of the plastic raw material and ensures the molding precision and quality of the injection molded product, but also makes the injection process smoother, reducing equipment failures and downtime caused by temperature issues, further improving production efficiency and bringing higher economic benefits to the enterprise.

[0031] Example 3:

[0032] This utility model is as follows Figures 1-4 As shown, the fixed mold 5 has an injection cavity inside, and the liquid inlet channel 7 is distributed on the outer edge of the injection cavity. The return channel 8 is located below the inner cavity of the injection cavity and is arranged longitudinally. The moving mold 4 and the fixed mold 5 are provided with sealing rubber rings on their opposing surfaces, and the sealing rubber rings surround the edges of the moving mold 4 and the fixed mold 5. The temperature display 6 is electrically connected to the temperature sensor in the inner cavity of the fixed mold 5. The top of the liquid storage tank 9 is provided with a liquid replenishment port, and a sealing cap is snapped onto the liquid replenishment port. The liquid level sensor is provided inside the liquid storage tank 9.

[0033] By adopting the above technical solution, the sealing rubber rings arranged around the edges on the opposing surfaces of the moving mold 4 and the fixed mold 5 greatly enhance the sealing performance between them. This not only effectively prevents the leakage of plastic raw materials during the injection molding process, avoiding waste of raw materials and pollution of equipment, but also maintains stable pressure in the injection cavity, providing good conditions for high-quality injection molding and helping to produce plastic products with higher precision and better surface quality. The temperature display 6 is electrically connected to the temperature sensor inside the fixed mold 5, which can provide real-time and accurate feedback of the temperature information inside the fixed mold 5. Operators can adjust the working status of the cooling system in a timely manner according to the displayed temperature data to achieve precise temperature control.

[0034] The working principle of this utility model is as follows: the plasticized plastic raw material is conveyed to the moving mold 4 under the push of the injection screw 3, and cooperates with the fixed mold 5 to complete the injection molding process. The temperature sensor inside the fixed mold 5 is electrically connected to the temperature display 6 on the top of the fixed mold 5, which can monitor the temperature inside the fixed mold 5 in real time and display the temperature data on the temperature display 6. When the temperature inside the fixed mold 5 needs to be adjusted, the operator can perform corresponding operations according to the data displayed on the temperature display 6.

[0035] If it is necessary to lower the temperature of the fixed mold 5, the liquid pump 10 is started. The coolant in the storage tank 9 enters the inner cavity of the fixed mold 5 through the liquid inlet channel 7. The liquid inlet channel 7 is distributed on the outer edge of the injection cavity. This design allows the coolant to flow evenly around the injection cavity, effectively removing heat. At the same time, the flow control valve 12 installed at one end of the top pipe of the liquid pump 10 can precisely adjust the flow rate of the coolant, thereby achieving precise control of the temperature of the fixed mold 5. After being heated, the coolant is drawn back to the storage tank 9 through the return channel 8 under the action of the return pump 11. In this way, a circulation system is formed between the fixed mold 5 and the storage tank 9, realizing the recycling of the coolant, improving the utilization rate of the coolant, and reducing production costs.

[0036] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0037] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A precision temperature-controlled injection molding device, comprising an injection molding machine body (1), characterized in that: The injection molding machine body (1) has a feed hopper (2) connected to the right side of its top. An injection screw (3) is movably installed inside the injection molding machine body (1). A moving mold (4) is fixedly installed at the left end of the injection screw (3). A fixed mold (5) is arranged on the left side of the moving mold (4). A temperature display (6) is fixedly installed on the top of the fixed mold (5). A liquid inlet channel (7) is opened through the outside of the inner cavity of the fixed mold (5). The top of the liquid inlet channel (7) is connected to a pipe. There is a liquid pump (10), the liquid inlet pipe at the bottom of the liquid pump (10) is connected to a liquid storage tank (9), a flow control valve (12) is movably installed at one end of the pipe at the top of the liquid pump (10), a sealing shell (14) is fixedly installed at the bottom of the left end of the injection screw (3) and at the top of the injection molding machine body (1), a lower heating component (15) is fixedly installed inside the sealing shell (14), and the lower heating component (15) is wrapped around the outside of the injection screw (3).

2. The precision temperature-controlled injection molding device according to claim 1, characterized in that: The bottom of the inner cavity of the fixed mold (5) is provided with a reflux channel (8), and the top of the reflux channel (8) is connected to a reflux pump (11) through a pipe. The outlet pipe of the reflux pump (11) is connected to the top of the storage tank (9).

3. The precision temperature-controlled injection molding device according to claim 1, characterized in that: A support frame (13) is fixedly installed on the right side of the front of the injection molding machine body (1). The support frame (13) is designed in a semi-rectangular shape and is wrapped around the outside of the liquid storage tank (9).

4. The precision temperature-controlled injection molding device according to claim 1, characterized in that: An upper heating assembly (16) is provided above the sealed outer shell (14), and a sealed top cover (17) is fixedly installed on the top of the upper heating assembly (16).

5. The precision temperature-controlled injection molding device according to claim 4, characterized in that: The upper heating component (16) is arranged horizontally at equal distances and is offset from the lower heating component (15) below.

6. The precision temperature-controlled injection molding device according to claim 2, characterized in that: The mold (5) has an injection cavity inside, and the liquid inlet channel (7) is distributed on the outer edge of the injection cavity. The return channel (8) is located below the inner cavity of the injection cavity and is arranged longitudinally.

7. The precision temperature-controlled injection molding device according to claim 1, characterized in that: Sealing rubber rings are provided on the surfaces of the moving mold (4) and the fixed mold (5) that are opposite to each other, and the sealing rubber rings surround the edges of the moving mold (4) and the fixed mold (5).

8. The precision temperature-controlled injection molding device according to claim 1, characterized in that: The temperature display (6) is electrically connected to the temperature sensor installed in the inner cavity of the mold (5). The top of the liquid storage tank (9) is provided with a liquid inlet, and a sealing cap is snapped onto the liquid inlet. A liquid level sensor is installed inside the liquid storage tank (9).

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