Split type temperature control glue melting cylinder

Abstract

The utility model discloses a split type temperature control glue melting cylinder, including axially front and back setting's front section glue melting cylinder and rear section glue melting cylinder, the front section glue melting cylinder outside sets up front section heating ring group, rear section heating ring is set up to the rear section glue melting cylinder outside, be equipped with the discharge port on the rear section glue melting cylinder, the front section glue melting cylinder and rear section glue melting cylinder between axial connection has the water transport baffle, the water transport baffle can cut off the heat conduction between the front section glue melting cylinder and rear section glue melting cylinder. The utility model provides a split type temperature control glue melting cylinder, when producing small gram weight product, only open a part of heating ring, and the heat conduction between the front section glue melting cylinder and rear section glue melting cylinder is blocked through the water transport baffle simultaneously, the heating travel of glue material is accurately controlled, prevents its early melting, effectively avoids the technical problem of the inadmissible discharge of glue material adhering on the screw rod, the reduction of production efficiency and the unstable product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of rubber injection molding machinery, specifically to a split-type temperature-controlled melting cylinder. Background Technology

[0002] Currently, injection molding machines generally use an integral melt cylinder structure. This structure provides uniform heat transfer and is suitable for most molding scenarios. However, when producing small-weight products with an injection stroke of less than 0.5D (where D is the inner diameter of the melt cylinder), the rubber material melts prematurely at the beginning of the feeding process due to the continuous heating from the external heating coils. This prematurely melted rubber material adheres to the screw, leading to poor feeding, prolonged production cycles, reduced efficiency, and potentially causing a series of quality problems such as yellowing of products, black spots, and inaccurate metering stroke.

[0003] Furthermore, the rubber compound is in solid granular form when it first enters the melting cylinder, resulting in poor flowability and relatively minor wear on the melting cylinder and screw. For some general-purpose rubber compounds, using expensive alloy steel for this section of the melting cylinder would lead to a waste of material costs. However, by selecting materials specifically tailored to the physical state of the rubber compound in different sections, significant cost savings can be achieved.

[0004] Therefore, the aforementioned technical problems need to be solved. Utility Model Content

[0005] This utility model addresses the above-mentioned technical problems by providing a split-type temperature-controlled melting cylinder. When producing small-weight products, only a portion of the heating coils are activated, while a water-cooled partition blocks heat conduction between the front and rear melting cylinders. This precisely controls the heating path of the adhesive material, preventing premature melting. It effectively avoids the technical problems of poor material feeding, reduced production efficiency, and unstable product quality caused by adhesive material adhering to the screw.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A split-type temperature-controlled melt glue cylinder includes a front melt glue cylinder and a rear melt glue cylinder arranged axially front to back. A front heating coil assembly is provided on the outside of the front melt glue cylinder, and a rear heating coil is provided on the outside of the rear melt glue cylinder. A discharge port is opened on the rear melt glue cylinder. A water-cooling sleeve is axially connected between the front melt glue cylinder and the rear melt glue cylinder, and the water-cooling sleeve can isolate the heat conduction between the front melt glue cylinder and the rear melt glue cylinder.

[0008] This split-type temperature-controlled melting cylinder has a water-cooling sleeve connecting the front and rear melting cylinders, with the discharge port located on the rear melting cylinder. When producing small-weight products, the rear heating coil on the rear melting cylinder can be closed, allowing the rubber material to enter from the discharge port and be conveyed forward by the rotating injection screw. Because the rear heating coil is closed, and the water-cooling sleeve provides insulation between the front and rear melting cylinders, the heating path of the rubber material is reduced, preventing premature melting. This effectively avoids problems such as poor material feeding, reduced production efficiency, and unstable product quality caused by rubber material adhering to the screw.

[0009] The design is further optimized by providing a cooling water inlet and a cooling water outlet on the water-carrying sleeve. During operation, cooling water enters the water-carrying sleeve through the cooling water inlet and flows out through the cooling water outlet, accelerating the temperature reduction of the water-carrying sleeve and effectively isolating the heat transfer between the front and rear sections of the melt-bonding cylinder.

[0010] Further optimization of the design includes a flange structure that securely connects the front melt-bonding cylinder, the water-cooling jacket, and the rear melt-bonding cylinder. This flange structure provides a simple and convenient connection between the front melt-bonding cylinder, the water-cooling jacket, and the rear melt-bonding cylinder.

[0011] In a further optimized design, the flange structure includes a threaded flange on the front melt cylinder and a through-hole flange on the rear melt cylinder, wherein the threaded flange and the through-hole flange are connected.

[0012] Further optimization involves using alloy steel for the front melting cylinder and medium carbon steel for the rear melting cylinder. Because the adhesive is in a solid state with low fluidity in the rear melting cylinder, wear on the screw and rear melting cylinder is less, allowing for the use of cheaper medium carbon steel. Since the front melting cylinder experiences greater wear, alloy steel is used. Using different materials for each section achieves cost savings.

[0013] The design has been further optimized so that the rear heating coil can be independently controlled to heat up or not. When producing low-weight products, the power to the rear heating coil can be turned off to prevent the adhesive from melting prematurely.

[0014] Compared with the prior art, the split-type temperature-controlled melting cylinder of this utility model has the following technical advantages:

[0015] 1. Preventing premature melting of rubber compound: When producing small-weight products, the rear heating coil can be turned off, and cooling water can be simultaneously introduced into the water-cooling jacket. This way, after the rubber compound enters the rear melting cylinder from the feed port, it is transported in a relatively low-temperature environment, effectively reducing the heating stroke of the rubber compound. This fundamentally prevents the rubber compound from melting prematurely in the feeding area and adhering to the screw, solving problems such as poor feeding, yellowing of products, black spots, and inaccurate stroke.

[0016] 2. Thermal conduction isolation: The design of the water-cooling jacket not only provides cooling, but more importantly, it physically isolates the high-temperature front melt cylinder from the low-temperature rear melt cylinder, ensuring independent and controllable temperature in the rear section.

[0017] 3. Cost savings: Since the adhesive material in the downstream melting cylinder consists of solid particles, wear is less, allowing for the use of inexpensive medium carbon steel. In contrast, the upstream melting cylinder, which comes into contact with the molten adhesive, experiences heavier wear and therefore requires high-performance alloy steel. This segmented material selection approach significantly reduces overall equipment costs while ensuring the performance of key components.

[0018] 4. Compact structure and reliable connection: The connection structure composed of threaded flanges and through-hole flanges achieves a firm axial connection of the split components, ensuring the stability and sealing of the overall structure. Attached Figure Description

[0019] Figure 1 This is a perspective view of a specific embodiment of the split-type temperature-controlled melting cylinder of this utility model;

[0020] Figure 2 yes Figure 1 Side view;

[0021] Figure 3 yes Figure 2 AA section view;

[0022] Figure 4 yes Figure 3 BB cross-sectional view.

[0023] In the diagram: 1. Front heating coil assembly; 2. Front melting cylinder; 3. Threaded flange; 4. Water supply sleeve; 5. Through-hole flange; 6. Rear heating coil; 7. Discharge port; 8. Rear melting cylinder; 9. Injection screw; 10. Cooling water inlet; 11. Cooling water outlet; 12. Flange structure A. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0025] like Figures 1 to 4 As shown, this invention relates to a specific embodiment of a split-type temperature-controlled melting cylinder.

[0026] like Figure 1 and Figure 3As shown, the split-type temperature-controlled melt cylinder includes a front melt cylinder 2 and a rear melt cylinder 8 arranged axially front to back. A front heating coil assembly 1 is installed on the outside of the front melt cylinder 2, and a rear heating coil 6 is installed on the outside of the rear melt cylinder 8. A discharge port 7 is opened on the rear melt cylinder 8. A water-cooling sleeve 4 is axially connected between the front melt cylinder 2 and the rear melt cylinder 8. The water-cooling sleeve 4 can isolate the heat conduction between the front melt cylinder 2 and the rear melt cylinder 8. An injection screw 9 is installed through the front melt cylinder 2 and the rear melt cylinder 8.

[0027] The split-type temperature-controlled melting cylinder has a water-cooling sleeve 4 connecting the front melting cylinder 2 and the rear melting cylinder 8, with the discharge port 7 located on the rear melting cylinder 8. When producing small-weight products, the rear heating coil 6 on the rear melting cylinder 8 can be closed, and the rubber material enters the rear melting cylinder 8 through the discharge port 7 and is conveyed forward by the rotating injection screw 9. Because the rear heating coil 6 is closed, and the water-cooling sleeve 4 provides insulation between the front and rear melting cylinders 8, the heating path of the rubber material is reduced, preventing premature melting. This effectively avoids problems such as poor material feeding, reduced production efficiency, and unstable product quality caused by rubber material adhering to the screw.

[0028] like Figure 2 and Figure 4 As shown, the water-carrying sleeve 4 is provided with a cooling water inlet 10 and a cooling water outlet 11. During operation, cooling water enters the water-carrying sleeve 4 through the cooling water inlet 10 and flows out from the cooling water outlet 11, which accelerates the temperature reduction of the water-carrying sleeve 4 and effectively isolates the heat conduction between the front section of the melt cylinder 2 and the rear section of the melt cylinder 8.

[0029] like Figure 1 and Figure 3 As shown, the split-type temperature-controlled glue-melting cylinder also includes a flange structure A, which securely connects the front glue-melting cylinder 2, the water-cooling sleeve 4, and the rear glue-melting cylinder 8. The flange structure A, which securely connects the front glue-melting cylinder 2, the water-cooling sleeve 4, and the rear glue-melting cylinder 8, has a simple structure and is easy to install.

[0030] like Figure 1 and Figure 3 As shown, flange structure A includes a threaded flange 3 on the front melt cylinder 2 and a through-hole flange 5 on the rear melt cylinder 8. The threaded flange 3 and the through-hole flange 5 are axially tightened by a number of screws.

[0031] like Figure 1 and Figure 3 As shown, the front melting cylinder 2 is made of alloy steel, while the rear melting cylinder 8 is made of medium carbon steel. Because the adhesive is in a solid state in the rear melting cylinder 8 and has low fluidity, the wear on the screw and the rear melting cylinder 8 is less, allowing for the use of cheaper medium carbon steel. The front melting cylinder 2, due to its higher wear, is made of alloy steel. Using different materials for each section achieves cost savings.

[0032] In the split-type temperature-controlled melting cylinder of the above embodiment, the rear heating coil 6 can be independently controlled to heat up or not heat up. When producing small-weight products, the power to the rear heating coil 6 can be turned off, effectively preventing the adhesive from melting prematurely.

[0033] This split-type temperature-controlled melting cylinder activates only a portion of the heating coils when producing small-weight products, while simultaneously blocking heat conduction between the front and rear melting cylinders via a water-cooled partition. This precisely controls the heating path of the adhesive, preventing premature melting and effectively avoiding technical problems such as poor material feeding, reduced production efficiency, and unstable product quality caused by adhesive adhering to the screw.

[0034] In summary, as described in the specification and figures, this utility model has been manufactured into actual samples and subjected to multiple use tests. The test results demonstrate that this utility model achieves its intended purpose, and its practicality is beyond doubt. The embodiments described above are merely for illustrative purposes and are not intended to limit the scope of this utility model. Any equivalent embodiments made by those with common knowledge in the relevant technical field, utilizing the technical content disclosed in this utility model, without departing from the scope of the technical features and similar features disclosed in this utility model, are all within the protection scope of this utility model.

Claims

1. A split-type temperature-controlled melting cylinder, characterized in that: It includes a front section melt cylinder (2) and a rear section melt cylinder (8) arranged axially front to back. The front section melt cylinder (2) is provided with a front section heating coil group (1), and the rear section melt cylinder (8) is provided with a rear section heating coil (6). The rear section melt cylinder (8) is provided with a discharge port (7). A water-cooling sleeve (4) is axially connected between the front section melt cylinder (2) and the rear section melt cylinder (8). The water-cooling sleeve (4) can isolate the heat conduction between the front section melt cylinder (2) and the rear section melt cylinder (8).

2. The split-type temperature-controlled melting cylinder according to claim 1, characterized in that, The water-carrying sleeve (4) is provided with a cooling water inlet (10) and a cooling water outlet (11).

3. The split-type temperature-controlled melting cylinder according to claim 1 or 2, characterized in that, Includes a flange structure (A) that securely connects the front melt cylinder (2), the water-carrying sleeve (4), and the rear melt cylinder (8).

4. The split-type temperature-controlled melting cylinder according to claim 3, characterized in that, The flange structure (A) includes a threaded flange (3) disposed on the front section melt cylinder (2) and a through-hole flange (5) disposed on the rear section melt cylinder (8), wherein the threaded flange (3) and the through-hole flange (5) are connected.

5. The split-type temperature-controlled melting cylinder according to claim 1, characterized in that, The front section melt cylinder (2) is made of alloy steel, and the rear section melt cylinder (8) is made of medium carbon steel.

6. The split-type temperature-controlled melting cylinder according to claim 1, characterized in that, The rear heating coil (6) can be independently controlled to heat up or not heat up.

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