A multi-colloid switching glue supply device

Abstract

The utility model provides a kind of multi-gel switching glue supply device, including outer cylinder, inner cylinder and drive assembly. Outer cylinder lateral wall is spaced apart along axial direction and is provided with multiple glue inlets, and each glue inlet is connected with one high-pressure pressure-maintaining glue supply channel respectively;Inner cylinder is axially slidably arranged in outer cylinder, with glue storage cavity, and its lateral wall is provided with the through hole for selectively communicating with each glue inlet;Drive assembly is used to drive the inner cylinder to move along the axial direction, so that the through hole is aligned with the target glue inlet. The device realizes the quick switching of multiple glues through axial sliding, the glue supply response is rapid, the structure is compact, effectively improves the continuity and stability of glue supply, and is suitable for multi-component molding, precision dispensing and other application scenarios.

Description

Technical Field

[0001] This utility model relates to the field of colloid conveying equipment technology, and in particular to a multi-colloid switching colloid supply device. Background Technology

[0002] In industrial applications requiring multiple colloid supplies, especially in multi-color injection molding, sealing dispensing, or multi-component material molding processes, it is often necessary to quickly switch between different colloids according to process requirements and ensure a continuous and stable supply process. Existing colloid supply systems mostly employ a multi-channel structure, with each channel independently corresponding to a specific colloid. When switching to a target colloid, the colloid flow direction is controlled by opening the corresponding channel and closing other channels.

[0003] like Figure 1 As shown, a typical three-channel dispensing structure has ports A, B, and C for supplying three different adhesives. When one port (e.g., port A) is in use, the other ports (ports B and C) are closed, and the dispensing channels are at atmospheric pressure or in standby mode. When switching adhesives, the target channel needs to re-establish its working pressure, and the adhesive delivery requires a certain start-up process, resulting in a response delay in dispensing, interruption of adhesive continuity, and subsequent cooling of the front-end adhesive. This affects the subsequent molding quality and easily leads to defects such as weld lines, voids, and poor adhesion.

[0004] Furthermore, because multiple glue inlets are not under constant pressure, the glue pressure fluctuates significantly during the switching process, which cannot meet the application scenarios requiring high-precision glue supply continuity. Therefore, existing glue supply devices still suffer from problems such as complex structure, slow response, and unstable glue supply when dealing with the need for rapid switching between multiple glues, and urgently need improvement. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-colloid switching glue supply device with simple structure, high glue supply continuity and fast switching speed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A multi-colloid switching adhesive supply device includes an outer cylinder, an inner cylinder, and a drive assembly. The outer cylinder has multiple adhesive inlets spaced axially along its sidewall, each inlet connected to an adhesive supply channel, where the adhesive is under high pressure. The inner cylinder is slidably disposed within the outer cylinder along its axial direction and has an adhesive storage chamber. Its sidewall has openings for selective communication with each adhesive inlet. The drive assembly drives the inner cylinder to move axially relative to the outer cylinder so that the openings align with the target adhesive inlets.

[0007] Furthermore, the glue inlet is symmetrically arranged on both sides in the axial direction of the outer cylinder to ensure that the inner cylinder is subjected to uniform force on both sides during axial movement, thereby reducing friction between the inner and outer cylinders.

[0008] Furthermore, the glue inlets are evenly arranged along the axial direction of the side wall of the outer cylinder.

[0009] Furthermore, the glue outlet direction is the same as the glue passage direction of the through port, and both are arranged radially, so that the inner cylinder through port and the outer cylinder glue inlet achieve linear connection during axial movement.

[0010] Furthermore, the servo drive component includes either a servo motor or a stepper motor, which is connected to the inner cylinder drive to drive the inner cylinder to move axially.

[0011] Furthermore, the outer circular surface of the inner cylinder and the inner circular surface of the outer cylinder form a clearance fit, with a fit clearance of less than 0.05 mm.

[0012] Furthermore, the edge of the opening is provided with a reinforcing rib structure to give it the ability to resist deformation under high pressure.

[0013] Furthermore, the edges of the opening are chamfered to reduce shear stress during the flow of the colloid.

[0014] Furthermore, each inlet of the outer cylinder is equipped with a pressure regulating component to adjust the pressure parameters of each adhesive supply channel.

[0015] Furthermore, guide flanges are provided at both ends of the inner cylinder, and the guide flanges form a limiting fit with the inner wall of the outer cylinder to stabilize the axial movement trajectory of the inner cylinder.

[0016] The aforementioned multi-colloid switching adhesive supply device establishes multiple adhesive supply channels under high pressure holding conditions and achieves rapid linear docking between the inlet and the target inlet through the axial movement of the inner and outer cylinders. This effectively avoids the problem of re-establishing pressure during switching in traditional multi-channel systems, achieving seamless switching between multiple colloids. This structure significantly improves the adhesive supply response speed and continuity, and substantially reduces the risks of adhesive delay, cooling, and flow interruption during switching. It is particularly suitable for applications requiring high stability and accuracy in adhesive supply, such as multi-color injection molding, precision dispensing, and multi-component molding, solving the technical problems of complex structure, slow response, and unstable adhesive supply in existing technologies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a multi-colloid switching supply device in the prior art; Figure 2 This is a structural schematic diagram of the multi-colloid switching adhesive supply device provided by this utility model. Detailed Implementation

[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] like Figure 2 As shown, this application provides a multi-colloid switching adhesive supply device, including: an outer cylinder 1, an inner cylinder 4, and a drive assembly 7.

[0020] Specifically, the outer cylinder 1 has multiple glue inlets 2 spaced apart along the axial direction on its side wall. Each glue inlet 2 is connected to a glue supply channel 3, and the glue in the glue supply channel 3 is in a high-pressure holding state. The inner cylinder 4 is slidably disposed inside the outer cylinder 1 along the axial direction and has a glue storage cavity 5. The side wall of the inner cylinder 4 is provided with a through-hole 6 for selectively communicating with each glue inlet 2. The drive assembly 7 is used to drive the inner cylinder 4 to move axially relative to the outer cylinder 1 so that the through-hole 6 is aligned with the target glue inlet 2.

[0021] This device, through its sliding structure design, abandons the traditional multi-channel valve control mode, effectively reducing response delay during switching and improving the continuity and stability of adhesive supply. During switching, the target channel maintains a high-pressure state, eliminating the need to rebuild pressure, significantly shortening the switching response time and avoiding issues such as adhesive cooling and intermittent adhesive supply, thus improving the consistency and quality of the final molded product. Simultaneously, the linear connection structure between the inlet 6 and the inlet 2 reduces the complexity of channel switching and improves reliability. The pressure-holding design of the adhesive supply channel 3 ensures that each adhesive is always ready for use, meeting the process requirements of rapid dispensing and high-precision molding of multi-component materials.

[0022] More specifically, the glue inlet 2 is symmetrically arranged on both sides in the axial direction of the outer cylinder 1 so that the inner cylinder 4 is subjected to uniform force on both sides during axial movement, reducing the friction between the inner cylinder 4 and the outer cylinder 1, which helps to extend the service life of the sliding assembly and reduce the frequency of maintenance.

[0023] The glue inlet 2 is evenly arranged along the axial direction of the side wall of the outer cylinder 1, which can simplify the servo or stepper control algorithm and improve the switching positioning accuracy. At the same time, with the symmetrical layout, the mechanical performance can be further optimized, and the structural stability and stress distribution balance of the device can be maintained during operation.

[0024] The dispensing direction of the glue inlet 2 is the same as the glue flow direction of the outlet 6, and both are radially arranged, enabling linear connection between the outlet 6 of the inner cylinder 4 and the glue inlet 2 of the outer cylinder 1 during axial movement. The consistent radial glue flow direction forms a straight channel between the glue inlet 2 and the outlet 6, reducing the fluid path length and structural complexity; at the same time, the elimination of channel bends effectively reduces the flow resistance and shear loss of the colloid during the switching process, making it suitable for high viscosity or easily segregated colloids; in addition, the linear contact method facilitates the design and molding of the sealing structure around the outlet, improving the sealing effect and reducing the risk of leakage.

[0025] The servo drive assembly 7 includes either a servo motor or a stepper motor, which is connected to the inner cylinder 4 for driving the inner cylinder 4 to move axially. The servo motor has closed-loop control capability and can adaptively adjust according to load changes to avoid overshoot and accumulated errors; the stepper motor can achieve high-resolution displacement control through microstepping drive, with a simple structure and low control cost. This configuration can significantly enhance the reliability and flexibility of glue supply switching control.

[0026] The outer circular surface of the inner cylinder 4 and the inner circular surface of the outer cylinder 1 form a clearance fit, with a clearance of less than 0.05 mm. By strictly controlling the assembly clearance between the inner and outer cylinders, the positioning stability and smoothness of the adhesive supply system during switching can be effectively improved. The micro-gap structure reduces the risk of mechanical shaking and adhesive leakage, improving the overall sealing performance and service life of the equipment.

[0027] The edge of the through-hole 6 is equipped with a reinforcing rib structure to give it the ability to resist deformation under high pressure, and to prevent problems such as glue leakage, glue flow deviation or discontinuous glue supply caused by local deformation of the material.

[0028] The edge of the inlet 6 is chamfered to reduce shear stress during colloid flow and improve hydrodynamic characteristics. This is especially suitable for applications requiring high fluid stability, such as heat-sensitive, shear-sensitive, or filler-reinforced colloids. Simultaneously, the chamfer also reduces mechanical wear on the edge structure caused by long-term fluid erosion, extending its service life.

[0029] Each glue inlet 2 of the outer cylinder 1 is equipped with a pressure regulating component on its exterior to adjust the pressure parameters of each glue supply channel 3. The pressure regulating component helps achieve precise pressure control of the multi-channel glue supply system, avoiding problems such as glue flow rate fluctuations or uneven glue supply caused by inconsistent supply pressure.

[0030] The inner cylinder 4 has guide flanges at both ends. The guide flanges form a limiting fit with the inner wall of the outer cylinder 1 to stabilize the axial movement trajectory of the inner cylinder 4, avoid eccentricity, jamming or structural interference during the switching process, and ensure the docking accuracy and sealing effect of the through port 6 and the glue inlet 2.

[0031] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A multi-colloid switching adhesive supply device, characterized in that, include: An outer cylinder has multiple glue inlets spaced axially along its sidewalls, each inlet connected to a glue supply channel, where the glue is under high pressure. An inner cylinder is slidably disposed within the outer cylinder, having a glue storage cavity and a port on its sidewall for selective communication with each glue inlet. A drive assembly drives the inner cylinder to move axially relative to the outer cylinder, aligning the port with the target glue inlet.

2. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The glue inlet is symmetrically arranged on both sides in the axial direction of the outer cylinder so that the inner cylinder is subjected to uniform force on both sides during axial movement, thereby reducing the friction between the inner cylinder and the outer cylinder.

3. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The glue inlets are evenly arranged along the axial direction of the side wall of the outer cylinder.

4. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The glue outlet direction is the same as the glue passage direction of the through-hole, and both are arranged radially, so that the inner cylinder through-hole and the outer cylinder glue inlet achieve linear connection during axial movement.

5. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The drive component includes either a servo motor or a stepper motor, which is connected to the inner cylinder for driving the inner cylinder to move axially.

6. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The outer circular surface of the inner cylinder and the inner circular surface of the outer cylinder form a clearance fit, with a clearance of less than 0.05 mm.

7. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The edge of the opening is provided with a reinforcing rib structure to give it the ability to resist deformation under high pressure.

8. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The edge of the opening is chamfered to reduce shear stress during the flow of the colloid.

9. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, Each inlet of the outer cylinder is equipped with a pressure regulating component to adjust the pressure parameters of each adhesive supply channel.

10. The multi-colloid switching adhesive supply device as described in claim 1, characterized in that, The inner cylinder is provided with guide flanges at both ends. The guide flanges form a limiting fit with the inner wall of the outer cylinder to stabilize the axial movement trajectory of the inner cylinder.

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