A single-double color switching mechanism for a double-color injection molding machine and a double-color injection molding machine

Abstract

The utility model belongs to two -color injection moulding technical field provides a single two -color conversion mechanism and two -color injection molding machine for two -color injection molding machine, include: glue pipe is led, its inside is provided with the material channel of penetration, and the feed end of material channel is connected with auxiliary machine, the plugging piece, its one end can insert the feed end of material channel, the connecting block, the plugging piece is screwed on the connecting block, and the connecting block is clamped in glue pipe is led, when needing two -color injection molding machine to carry out two -color extrusion, the feed end of material channel is connected with auxiliary machine, is used for conveying injection raw material to injection molding machine head, when needing to carry out single -color extrusion, disconnect the connection between glue pipe and auxiliary machine, and insert the feed end of material channel with plugging piece, realize the sealing of glue pipe is led, the above structure design need not to disassemble injection molding machine head to complete the switching operation of injection mode, remarkably reduced the operation complexity and maintenance cost, improved the use convenience and production efficiency of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of two-color injection molding technology, specifically relating to a single-to-two-color conversion mechanism for a two-color injection molding machine and a two-color injection molding machine. Background Technology

[0002] A two-color injection molding machine is a specialized injection molding device for producing plastic products with two different colors or materials. It injects two different plastic materials or colors into different areas of the mold in a single operation, creating finished products with complex color combinations or functional characteristics. This technology is particularly suitable for products requiring multiple color or material combinations, such as automotive interior parts, home appliance housings, and electronic product accessories.

[0003] In the actual production process of a two-color injection molding machine, when it is necessary to switch between single-color and two-color injection molding modes, the specific operation in the existing technology is as follows:

[0004] Single-color line production: Remove the glue guide tube and seal the interface on the injection molding machine head that was originally used to install the glue guide tube with a sealing component to prevent glue leakage during the injection molding process;

[0005] Two-color production line: Reinstall the guide tube and connect it to the auxiliary machine to achieve simultaneous feeding of two-color materials.

[0006] However, due to limitations in the angle design of the guide tube, the structure of the connection points, and the internal space layout of the injection molding machine head, the guide tube cannot be quickly disassembled. Replacement often requires partial disassembly of the injection molding machine head. This not only increases operational difficulty but also significantly reduces production efficiency. Utility Model Content

[0007] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is: to propose a single-color to two-color conversion mechanism for a two-color injection molding machine, which, by setting up a guide tube, a sealing component and a connecting block, allows the two-color injection mold to switch between single-color and two-color injection modes without disassembling the injection molding machine head, thereby reducing the complexity of operation and maintenance costs, and improving the convenience of equipment use and production efficiency; the modular design further improves the speed of installation and disassembly, and enhances the continuity and flexibility of production.

[0008] The technical solution adopted by this utility model to solve its technical problem is to propose a single-to-dual-color conversion mechanism for a two-color injection molding machine, comprising:

[0009] The guide tube has a through material channel inside, and the feed end of the material channel is connected to the auxiliary machine to transport the injection molding raw material to the injection molding head.

[0010] A sealing element, one end of which can be inserted into the feed end of the material channel to seal the material channel;

[0011] A connecting block, wherein the sealing component is threadedly connected to the connecting block and the connecting block is snapped onto the guide tube, for providing support for the sealing component;

[0012] When the two-color injection molding machine is required to perform two-color injection molding, the feed end of the material channel is connected to the auxiliary machine; when single-color injection molding is required, the connection between the guide tube and the auxiliary machine is disconnected, and the sealing member is inserted into the feed end of the material channel.

[0013] In the above-mentioned single-color / dual-color conversion mechanism for a two-color injection molding machine, the connecting block is provided with a through threaded hole, the outer wall of the sealing member is provided with an external thread, and the sealing member is threadedly connected to the threaded hole on the connecting block through its external thread.

[0014] In the above-mentioned single-to-dual-color conversion mechanism for a two-color injection molding machine, the connecting block is provided with a U-shaped opening, and the connecting block is snapped onto the guide tube through the U-shaped opening.

[0015] In the above-mentioned single-color / dual-color conversion mechanism for a two-color injection molding machine, the threaded hole and the U-shaped opening are arranged opposite to each other along the axial direction of the connecting block.

[0016] In the above-mentioned single-to-dual-color conversion mechanism for a two-color injection molding machine, the connecting block has a cavity with an open side, and the U-shaped opening is formed by the side wall of the connecting block extending along the open direction.

[0017] In the above-mentioned single-to-dual-color conversion mechanism for a two-color injection molding machine, the guide tube includes a bent portion, and a first portion and a second portion extending from both sides of the bent portion. The guide tube is connected to the injection molding machine head through the first portion and to the auxiliary machine through the second portion.

[0018] In the above-mentioned single-to-dual-color conversion mechanism for a two-color injection molding machine, the second part has a stepped shaft structure, and the connecting block is engaged with the small diameter section of the stepped shaft structure through a U-shaped opening.

[0019] In the above-mentioned single-to-dual-color conversion mechanism for a two-color injection molding machine, one end of the sealing member is provided with a conical structure, and the outer contour of the conical structure matches the inner wall of the feed end of the material channel.

[0020] In the above-mentioned single-to-dual-color conversion mechanism for a two-color injection molding machine, a drive unit is provided at the other end of the sealing member.

[0021] This solution also proposes a two-color injection molding machine, which includes the single-to-two-color conversion mechanism for a two-color injection molding machine and the two-color injection molding machine described above.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) By setting up guide tubes, sealing parts and connecting blocks, the two-color injection mold does not need to be disassembled when switching between single-color or two-color injection molding modes, which reduces the complexity of operation and maintenance costs, and improves the ease of use and production efficiency of the equipment; the modular design further improves the speed of installation and disassembly, and enhances the continuity and flexibility of production.

[0024] (2) The connecting block is provided with a threaded hole and a U-shaped opening. The sealing component is threadedly connected to the threaded hole, which facilitates quick assembly and ensures locking force. The U-shaped opening is snapped onto the guide tube, which enhances the stability and safety of the sealing component during operation.

[0025] (3) The conical structure on the sealing component forms an interference fit with the feed end of the material channel, generating sufficient radial pressure to achieve a good seal, effectively preventing leakage or backflow of molten plastic during injection molding, and improving the product molding quality. Attached Figure Description

[0026] Figure 1 This is a plan view of the connecting blocks in this scheme;

[0027] Figure 2 yes Figure 1 The left view in the middle;

[0028] Figure 3 This is a schematic diagram of the material guide tube in this scheme;

[0029] Figure 4 This is a schematic diagram of the sealing component in this solution.

[0030] In the figure, 1 is the sealing component; 2 is the connecting block; 3 is the threaded hole; 4 is the U-shaped opening; 5 is the cavity; 6 is the bent part; 7 is the first part; 8 is the stepped shaft structure; 9 is the small diameter section; 10 is the large diameter section; 11 is the tapered structure; and 12 is the driving part. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] One of the single-to-dual-color conversion mechanisms in this solution is mainly used for switching between single and dual-color injection molding modes of the two-color injection molding machine to ensure ease of operation and production efficiency.

[0034] like Figures 1 to 4 As shown, a single / dual-color conversion mechanism for a two-color injection molding machine according to this solution includes: a guide tube with a through material channel, the feed end of which is connected to an auxiliary machine for conveying injection molding raw materials to the injection molding machine head; a sealing member 1, one end of which is inserted into the feed end of the material channel for sealing the material channel; and a connecting block 2, the sealing member 1 being threadedly connected to the connecting block 2, and the connecting block 2 being snapped onto the guide tube for providing support for the sealing member 1.

[0035] When two-color injection molding is required, the feed end of the guide tube is connected to the auxiliary machine, allowing the injection molding material from the auxiliary machine to be transported to the injection molding machine head through the material channel inside the guide tube, thus achieving simultaneous injection molding of two different colors or materials of plastic. When switching the injection molding mode from two-color to single-color, the connection between the guide tube and the auxiliary machine is first disconnected to cut off the supply path of the second injection molding material. Then, the connecting block 2, which is pre-assembled with the sealing component 1, is snapped onto the guide tube, and one end of the sealing component 1 is inserted into the feed end of the material channel and fixed to seal the guide tube. This effectively prevents molten plastic from flowing back from the material channel during single-color injection molding, ensuring injection quality. This structural design allows for the switching of injection molding modes without disassembling the injection molding machine head, significantly reducing operational complexity and maintenance costs, and improving the ease of use and production efficiency of the equipment. At the same time, due to the modular structure, the installation and removal of the sealing component 1 and the guide tube can be completed in a short time, further improving the continuity and flexibility of production.

[0036] To achieve a stable connection between the sealing component 1 and the connecting block 2, the connecting block 2 is provided with a through threaded hole 3, and the outer wall of the sealing component 1 is provided with an external thread. The sealing component 1 is screwed into the threaded hole 3 of the connecting block 2 through its external thread to form a detachable threaded connection structure. This connection method is convenient for assembly and disassembly, and at the same time can provide sufficient locking force to ensure that the sealing component 1 remains stable during operation.

[0037] To enable quick installation and positioning between the connecting block 2 and the guide tube, the connecting block 2 is provided with a U-shaped opening 4, which is adapted to the outer circumference of the guide tube. Through the U-shaped opening 4, the connecting block 2 can be snapped onto the guide tube, thereby ensuring the stability and reliability of the sealing component 1 during operation.

[0038] Furthermore, the threaded hole 3 and the U-shaped opening 4 on the connecting block 2 are arranged opposite to each other along the axial direction of the connecting block 2. This structural design allows the axis of the sealing component 1 to be aligned with the central axis of the guide tube channel after installation, which not only improves the assembly accuracy but also facilitates a good sealing fit between the sealing component 1 and the channel, thereby significantly improving the sealing performance and working stability.

[0039] Furthermore, the connecting block 2 is an integrally molded structure with an internal cavity 5 that is open on one side. A U-shaped opening 4 is opened on the side wall of the connecting block 2 and extends along the opening direction of the cavity 5 to form a snap-fit ​​structure that can be used to snap the guide tube. This design not only facilitates assembly operations but also ensures a stable connection between the connecting block 2 and the guide tube.

[0040] Furthermore, the guide tube is a one-piece molded structure, including a bent section in the middle, and a first part 7 and a second part extending from both sides of the bent section respectively; the first part 7 is used to connect with the injection molding machine head, and the second part is connected with the auxiliary machine, thereby realizing the conveying path layout of the two-color raw materials; this structural design not only facilitates space arrangement, but also improves assembly efficiency and sealing performance.

[0041] Furthermore, the second part of the guide tube has a stepped shaft structure 8, which includes a large-diameter section 10 and a small-diameter section 9. When the connecting block 2 is snapped onto the guide tube, the U-shaped opening 4 on the connecting block 2 snaps onto the small-diameter section 9 of the stepped shaft. At the same time, the large-diameter section 10 of the stepped shaft structure 8 extends into the cavity 5 of the connecting block 2. This structural design not only facilitates quick assembly but also ensures the connection stability between the connecting block 2 and the guide tube.

[0042] Furthermore, one end of the sealing component 1 is provided with a conical structure 11, the outer contour of which matches the inner wall of the feed end of the material channel. When the sealing component 1 is inserted into the material channel, the conical structure 11 contacts the inner wall of the material channel and generates radial pressure, thereby establishing a reliable sealing interface between them. Through this sealing interface, the sealing component 1 can effectively prevent molten plastic from flowing backward from the material channel in single-color injection molding mode. This is because the tight fit between the conical structure 11 and the material channel can withstand the high pressure during the injection molding process, thereby preventing material leakage or backflow. In addition, during the insertion process, the interference fit between the conical structure 11 and the material channel will also generate a certain pre-tightening force, which helps to maintain the position stability of the sealing component 1 and prevent it from loosening or shifting during the injection molding process. By reasonably designing the angle and size of the conical structure 11, the sealing performance and operational stability can be further improved. This structure not only improves the ease of operation and production efficiency of the equipment, but also significantly reduces the product defect rate caused by poor sealing, and has good engineering application value.

[0043] To improve assembly efficiency and ease of operation, one end of the sealing component 1 is provided with a tapered structure 11 for insertion and sealing of the feed end of the material channel, and the other end is provided with a drive part 12 for cooperation with a tool. The sealing component 1 is screwed into the threaded hole 3 of the connecting block 2 through its external thread, and the drive part 12 applies rotational force during the assembly process, thereby achieving a stable connection with the connecting block 2. This design not only facilitates installation and disassembly, but also effectively ensures the mechanical strength and sealing reliability of the connection. The drive part 12 can be a common form such as a hexagonal head, an internal hexagonal groove, a cross groove, or a star groove.

[0044] Before switching from two-color injection molding to single-color injection molding mode on a two-color injection molding machine, the sealing component 1 can be installed on the connecting block 2 via a threaded connection. When it is necessary to switch from two-color injection molding to single-color injection molding, the connecting block 2 with the sealing component 1 installed is snapped onto the guide tube. At this time, the conical structure 11 on the sealing component 1 is positioned opposite to the feed end of the material channel. Then, the conical structure 11 is inserted into the material channel. Next, a tool is used to act on the drive unit 12 to rotate and lock the sealing component 1, so that it goes deeper into the material channel until the conical structure 11 fits tightly against the inner wall of the material channel, thus sealing the material channel. At the same time, the threaded connection between the sealing component 1 and the connecting block 2 is also fixed.

[0045] When switching from single-color injection molding mode back to two-color injection molding mode, first use a tool to apply force to the drive part 12 of the sealing part 1 to loosen the threaded connection between the sealing part 1 and the connecting block 2; as the sealing part 1 is unscrewed, the tapered structure 11 at its end gradually exits the feed end of the material channel, thereby releasing the sealing effect on the material channel; then remove the connecting block 2 from the guide tube; finally, reconnect the guide tube to the auxiliary machine to restore the conveying path of the second raw material, thus completing the mode switch.

[0046] This solution also proposes a two-color injection molding machine, which includes the single-to-two-color conversion mechanism for a two-color injection molding machine and the two-color injection molding machine described above.

[0047] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0048] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is 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 as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A single / dual-color conversion mechanism for a two-color injection molding machine, characterized in that, include: The guide tube has a through material channel inside, and the feed end of the material channel is connected to the auxiliary machine to transport the injection molding raw material to the injection molding head. A sealing element, one end of which can be inserted into the feed end of the material channel to seal the material channel; A connecting block, wherein the sealing component is threadedly connected to the connecting block and the connecting block is snapped onto the guide tube, for providing support for the sealing component; When the two-color injection molding machine is required to perform two-color extrusion, the feed end of the material channel is connected to the auxiliary machine; when single-color extrusion is required, the connection between the guide tube and the auxiliary machine is disconnected, and the sealing member is inserted into the feed end of the material channel.

2. The single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 1, characterized in that, The connecting block has a through threaded hole, and the outer wall of the sealing member has an external thread. The sealing member is threadedly connected to the threaded hole on the connecting block through its external thread.

3. The single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 2, characterized in that, The connecting block is provided with a U-shaped opening, and the connecting block is snapped onto the guide tube through the U-shaped opening.

4. The single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 3, characterized in that, The threaded hole and the U-shaped opening are arranged opposite each other along the axial direction of the connecting block.

5. The single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 4, characterized in that, The connecting block has a cavity with an opening on one side, and the U-shaped opening is formed by the sidewall of the connecting block extending along the direction of the opening.

6. The single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 5, characterized in that, The guide tube includes a bent portion, and a first portion and a second portion extending from both sides of the bent portion. The guide tube is connected to the injection molding machine head through the first portion and to the auxiliary machine through the second portion.

7. The single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 6, characterized in that, The second part has a stepped shaft structure, and the connecting block is engaged with the small diameter section of the stepped shaft structure through a U-shaped opening.

8. A single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 1, characterized in that, One end of the sealing component is provided with a conical structure, and the outer contour of the conical structure matches the inner wall of the feed end of the material channel.

9. The single / dual-color conversion mechanism for a two-color injection molding machine as described in claim 8, characterized in that, The other end of the sealing component is provided with a driving unit.

10. A two-color injection molding machine, characterized in that, Includes a single / dual-color conversion mechanism for a two-color injection molding machine as described in any one of claims 1-9.

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