A multi-cavity tube injection mold

Abstract

This utility model provides a multi-cavity tubular component injection mold, belonging to the field of mold technology. It solves the problem of improving the quantity controllability of mold processing and production. The multi-cavity tubular component injection mold includes a moving template with at least two grooves and a moving mold base fixed below the moving template. The moving template has a main flow channel and a number of branch flow channels corresponding to the grooves. Each branch flow channel connects to the main flow channel and a groove. A switching core is rotatably connected to the moving template. The upper end of the switching core has a switching groove radially formed. The switching core can rotate so that at least one branch flow channel connects to the main flow channel through the switching groove. Several positioning grooves are formed on the bottom surface of the switching core, spaced circumferentially along the bottom surface of the switching core. The moving mold base has positioning steel balls that can slide axially along the switching grooves. The positioning steel balls can be embedded in any one of the positioning grooves to keep the switching core circumferentially positioned. This multi-cavity tubular component injection mold can improve the quantity controllability of mold processing and production.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a multi-cavity tube injection mold. Background Technology

[0002] Injection molds are precision tools used for mass production of plastic products. Molten plastic is injected into the mold cavity under high temperature and pressure, and after cooling and solidification, it forms a plastic product with specific structure and dimensional accuracy.

[0003] Generally, after the moving mold and the fixed mold are closed, they can form a structurally stable cavity. Based on this, corresponding injection channels are opened on either the fixed mold or the moving mold. After the mold closing operation is completed, molten plastic is injected through these channels, allowing it to enter the cavity for shaping. Furthermore, to ensure production efficiency, existing technologies commonly create multiple cavities in the mold, and corresponding flow channels are created to connect these cavities and the injection channels. During processing, the injected molten plastic can be diverted within the flow channels and enter each cavity, thus achieving the molding of multiple products in a single operation.

[0004] However, the above structure has significant drawbacks. For example, if only one product is found to be substandard during quality inspection, another product needs to be produced to replace the defective one. However, during production, the molten plastic injected into the mold will flow directly through the runner to each cavity. Therefore, a sufficient amount of raw material needs to be injected to ensure that the product is formed in each cavity at the same time, resulting in overproduction and unnecessary waste of raw materials. Summary of the Invention

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a multi-cavity tube injection mold. The technical problem to be solved by this utility model is: how to improve the controllability of mold processing and production quantities.

[0006] The objective of this utility model can be achieved through the following technical solution: A multi-cavity tube injection mold includes a movable template with at least two grooves. The movable template also has a main channel for connecting the injection channel and a number of branch channels corresponding to the grooves. Each branch channel connects the main channel and the groove. The movable template is characterized by having a columnar switching core rotatably connected to it. The upper end of the switching core has a switching groove radially provided. The switching core can rotate to connect at least one of the branch channels with the main channel through the switching groove. The bottom surface of the switching core has a plurality of positioning grooves, which are spaced apart circumferentially along the bottom surface of the switching core. The multi-cavity tube injection mold also includes a movable mold base fixed below the movable template. The movable mold base has positioning steel balls that can slide axially along the switching grooves. The positioning steel balls can be embedded in any one of the positioning grooves to keep the switching core circumferentially positioned.

[0007] It should be noted first that the grooves on the moving mold plate in this application are mainly used to mate with the core and, after mold closing, mate with the fixed mold to form cavities. Main runners and branch runners are provided on the moving mold plate corresponding to each groove. The main runner is connected to the injection channel for injection molding, and the branch runners connect the main runner to each groove. This ensures that during subsequent operations, molten plastic can be injected through the injection channel and diverted by the main runner and branch runners, allowing the molten plastic to flow into each cavity. Furthermore, this application assembles a switching core on the moving mold plate and connects the main runner and branch runners through switching grooves on the switching core. The switching core can be manually rotated on the moving mold plate. As the switching core rotates, the switching grooves on the switching core also rotate accordingly, allowing the mold injection to have three states: one port of the switching groove connects to the main runner, and the other ports connect to the branch runners. In this state, the molten plastic can flow into each cavity as previously described. Alternatively, the switching core can be connected to the main channel via one port of the switching slot, with at least one of the remaining ports connected to the corresponding branch channel, while the other ports are disconnected from the other branch channels. Alternatively, the switching core can directly block the main channel via its outer side wall, preventing the injected molten plastic from flowing into the switching slot and thus preventing the molten plastic from being fed into the cavities through the branch channels. This effectively improves the controllability of the mold's production capacity for molded products, prevents overproduction, and avoids unnecessary waste of raw materials. Furthermore, regarding the rotation adjustment of the switching core, this application uses a positioning steel ball that slides along the axis of the switching core on the moving mold base, and several circumferentially spaced positioning grooves on the bottom surface of the switching core. When adjusting the switching core, the positioning steel ball can be embedded in the positioning grooves, allowing the operator to more clearly identify whether the adjustment of the switching core is in place, while ensuring the positioning accuracy of the switching core after adjustment, and preventing misalignment between the ports of the switching slot and the main channel or branch channels.

[0008] In the aforementioned multi-cavity tubular injection mold, the grooves are numerous and grouped, with two grooves in each group located on either side of the main flow channel. The moving mold plate has two branch channels corresponding to each group of grooves, and a switching core is installed on the moving mold plate corresponding to each group of grooves. The switching groove is a T-shaped groove with three ports penetrating the top sidewall of the switching core. Three positioning grooves are provided, corresponding one-to-one with the three ports of the switching groove along the axial direction of the switching core. This arrangement allows for a rational arrangement of the grooves without altering the overall structure of the moving mold plate, ensuring a sufficient number of cavities can be formed in the mold. Furthermore, each switching core controls a group of grooves; therefore, the switching groove is T-shaped, and the three positioning grooves correspond to the three ports of the switching groove. By rotating the switching core, the switching groove precisely controls the connection between the main flow channel and two branch channels, the connection between the main flow channel and one branch channel, or the non-connection between the main flow channel and all branch channels.

[0009] In the aforementioned multi-cavity tubular injection mold, a polygonal adjustment groove is formed on the upper end of the switching core and on the bottom wall of the switching groove, with the adjustment groove located at the center of the upper end of the switching core. This design allows the worker to insert a tool into the adjustment groove before mold closing and control the rotation of the switching core by turning the tool.

[0010] In the aforementioned multi-cavity tubular injection mold, one corner of the adjusting groove extends to the top surface of the switching core. This design ensures that the corner of the adjusting groove guides the insertion of the tooling during connection, guaranteeing ease of tooling assembly.

[0011] In the aforementioned multi-cavity tubular injection mold, a cylindrical positioning sleeve is fixed on the moving mold base. A steel ball is slidably connected within the positioning sleeve, which contains a spring. The spring elastically acts between the steel ball and the bottom wall of the positioning sleeve. This design ensures the stability of the positioning steel ball on the moving mold base. Furthermore, the presence of the spring allows the positioning steel ball to move downwards when pressed by the bottom surface of the switching core, preventing jamming. After the switching core rotates to its position, the elastic force of the spring pushes the positioning steel ball back to its sliding position and embeds it into the positioning groove, thereby achieving precise positioning of the switching core.

[0012] In the aforementioned multi-cavity tubular injection mold, the moving platen has a vertically extending mounting channel that penetrates the main flow channel, and the switching core is rotatably connected within this mounting channel. This design ensures the stability of the switching core's installation.

[0013] Compared with existing technologies, this multi-cavity tube injection mold has the following advantages:

[0014] 1. By installing a columnar switching core on the moving template that can rotate circumferentially, and opening a switching groove on the top of the switching core to connect the main runner and each branch runner, the main runner and each branch runner can be connected / or the main runner and at least one branch runner can be connected / or the main runner and each branch runner can be disconnected by rotating the switching core before injection molding. This controls the number of working cavities in the mold, thereby achieving precise control over the number of molded products and preventing unnecessary waste of raw materials.

[0015] 2. By using the steel balls installed on the moving mold base and the positioning groove opened on the bottom surface of the switching core, the operator can more clearly identify whether the adjustment of the switching core is in place, and at the same time ensure the positioning accuracy of the switching core after adjustment. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram and a partial enlarged view of the injection mold for multi-cavity tubular components.

[0017] Figure 2 This is a sectional view and a partial enlarged view of the injection mold for multi-cavity tubular parts.

[0018] Figure 3 This is a structural diagram of a moving template.

[0019] Figure 4 This is a structural schematic diagram of the switching core and a partial enlarged view.

[0020] Figure 5 This is a structural diagram showing another perspective of the switching core.

[0021] Figure 6 This is a schematic diagram of the moving mold base.

[0022] In the diagram, 1 is the moving template; 11 is the groove; 12 is the main flow channel; 13 is the branch flow channel; 14 is the installation channel; 2 is the switching core; 21 is the switching groove; 211 is the adjustment groove; 22 is the positioning groove; 3 is the moving mold base; 31 is the positioning steel ball; 32 is the positioning sleeve; and 321 is the spring. Detailed Implementation

[0023] 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.

[0024] like Figure 1 , Figure 3 as well as Figure 6As shown, this multi-cavity tube injection mold includes a movable template 1 and a movable mold base 3 fixed to the bottom of the movable template 1. A main channel 12 for communicating with the injection channel of the mold is opened laterally on the movable template 1. Then, four grooves 11 are opened on the plate surface of the movable template 1 on both sides of the main channel 12. These grooves 11 are used to cooperate with the core and cooperate with the fixed mold to form a cavity in the mold closed state. These grooves 11 are divided into two groups, and each group has two grooves 11. A number of branch channels 13 corresponding to the number of grooves 11 are opened on the movable template 1, and several branch channels 13 are connected to the main channel 12 and the corresponding grooves 11.

[0025] Combination Figure 2 , Figure 4 and Figure 5 Two installation channels 14 are vertically formed on the moving template 1 within the main channel 12. These two channels 14 are located on either side of the material feeding channel, and each channel 14 corresponds to one of two sets of grooves 11. Each installation channel 14 is rotatably connected to a columnar switching core 2. The top of the switching core 2 is flush with the upper surface of the moving template 1. A T-shaped switching groove 21 is formed at the upper end of the switching core 2, with all three ports of the groove penetrating the upper outer wall of the switching core 2. A regular hexagonal adjustment groove 211 is formed at the upper end of the switching core 2, located on the bottom wall of the switching groove 21, with one corner of the adjustment groove 211 extending to the top edge of the switching core 2. Figure 2 As shown, three positioning slots 22 are provided at the lower end of the switching core 2. The three positioning slots 22 are arranged at intervals along the circumference of the switching core 2. Furthermore, the positions of the three positioning slots 22 correspond one-to-one with the three ports of the switching core 2. Positioning steel balls 31 are provided on the moving mold base 3. Specifically, a cylindrical positioning sleeve 32 is installed on the moving mold base 3 by screw connection. The positioning steel balls 31 are slidably connected in the positioning sleeve 32. A spring 321 is embedded in the positioning sleeve 32. The spring 321 elastically acts between the bottom wall of the positioning sleeve 32 and the positioning steel balls 31.

[0026] Operating Principle: For actual production, before mold closing, the operator inserts an external hex wrench into the adjusting groove 211 and rotates it clockwise or counterclockwise, causing the switching core 2 to rotate. During this process, the positioning steel ball 31 on the moving mold base 3 moves from the first positioning groove 22 to the second positioning groove 22. In this state, the switching groove 21 is connected to the main flow channel 12 through one port, and the remaining two ports are connected to the two grooves 11 belonging to the same group through the branch flow channels 13. When the mold is closed, molten plastic is injected through the injection channel, distributed to the branch flow channels 13 via the main flow channel 12, and then output to the corresponding cavity for molding. The remaining switching cores 2 can be adjusted in the same way.

[0027] Secondly, if only one product needs to be processed, for one of the switching cores 2, use an external hex wrench to continue to tighten it, so that the positioning steel ball 31 is transferred from the second positioning groove 22 to the third positioning groove 22. At this time, the switching groove 21 on the switching core 2 is connected to the main channel 12 through one of the ports, the second port is connected to one of the cavities in the same group through the branch channel 13, and the third port is blocked by the upper inner wall of the installation channel 14. At this time, the liquid molten plastic is injected from the injection channel and injected into the corresponding cavity through the main channel 12 into the unobstructed branch channel 13, while the other cavity is not injected with molten plastic. As for the other switching core 2, since only one product needs to be processed, it is turned in the opposite direction using an external hex wrench, so that the positioning steel ball 31 is transferred from the second positioning groove 22 back to the first positioning groove 22. At this time, the upper outer wall of the switching core 2 blocks the main channel 12, and the three ports of the switching groove 21 are not connected to the main channel 12. Therefore, no molten plastic will be injected into the set of cavities corresponding to the switching core 2, so the mold can only injection mold one product.

[0028] 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.

[0029] Although this document frequently uses terms such as moving template 1, groove 11, main channel 12, branch channel 13, installation channel 14, switching core 2, switching core 21, switching groove 211, positioning groove 22, moving mold base 3, steel ball 31, positioning sleeve 32, and spring 321, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. A multi-cavity tube injection mold, comprising a movable template (1) having at least two grooves (11), wherein the movable template (1) is further provided with a main channel (12) for connecting the injection channel and branch channels (13) corresponding to the number of the grooves (11), wherein each branch channel (13) connects the main channel (12) and the grooves (11), characterized in that, The moving template (1) is rotatably connected to a columnar switching core (2) arranged vertically. The upper end of the switching core (2) is provided with a switching groove (21) along the radial direction. The switching core (2) can rotate so that at least one of the branch channels (13) is connected to the main channel (12) through the switching groove (21). The bottom surface of the switching core (2) is provided with a plurality of positioning grooves (22), and the plurality of positioning grooves (22) are arranged circumferentially along the bottom surface of the switching core (2). This multi-cavity tube injection mold also includes a moving mold base (3) fixed below the moving template (1). The moving mold base (3) is provided with positioning steel balls (31) that can slide axially along the switching groove (21). The positioning steel balls (31) can be embedded in any one of the positioning grooves (22) to keep the switching core (2) circumferentially positioned.

2. The multi-cavity tube molding tool of claim 1, wherein, The grooves (11) are numerous and divided into several groups. Each group of grooves (11) has two grooves and they are located on both sides of the main channel (12). The moving template (1) has two diversion channels (13) corresponding to each group of grooves (11). The moving template (1) is equipped with the switching core (2) corresponding to each group of grooves (11). The switching groove (21) is a T-shaped groove and its three ports are all set through the top side wall of the switching core (2). The positioning groove (22) has three grooves and they correspond one-to-one with the three ports of the switching groove (21) along the axial direction of the switching core (2).

3. The multi-cavity tube molding tool according to claim 1 or 2, characterized in that A polygonal adjustment groove (211) is provided on the upper end of the switching core (2) and on the bottom wall of the switching groove (21), and the adjustment groove (211) is located at the center of the upper end of the switching core (2).

4. The multi-cavity tube molding tool of claim 3, wherein, One corner of the adjustment groove (211) extends to the top surface of the switching core (2).

5. The multi-cavity tube molding tool of claim 4, wherein, A cylindrical positioning sleeve (32) is fixed on the moving mold base (3). The steel ball (31) is slidably connected inside the positioning sleeve (32). A spring (321) is provided inside the positioning sleeve (32), and the spring (321) elastically acts between the steel ball (31) and the bottom wall of the positioning sleeve (32).

6. The multi-cavity tube molding tool of claim 5, wherein, The moving template (1) has a vertically extending installation channel (14) that passes through the main channel (12), and the switching core (2) is rotatably connected in the installation channel (14).

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