Controllable runner injection mold

Abstract

The utility model discloses a controllable runner injection mold which comprises a lower mold assembly and an upper mold assembly which can be close to each other and closed, the lower mold assembly and the upper mold assembly are closed to define a cavity of an injection product, and at least one of the lower mold assembly and the upper mold assembly is provided with a runner groove. The lower die assembly and the upper die assembly are arranged in the cavity, so that a main runner and at least two branch runners communicated with the main runner and the cavity are defined after the lower die assembly and the upper die assembly are folded, at least one of the lower die assembly and the upper die assembly is rotationally connected with a runner adjusting part, the runner adjusting part is inserted into the branch runners so as to block the branch runners, and a control channel is formed in the runner adjusting part. When the runner adjusting piece rotates by a preset angle, the control channel is communicated with the branch runner. The utility model aims to overcome the defects in the prior art, and provides the controllable runner injection mold which can realize accurate injection molding and avoid material waste.

Description

Technical Field

[0001] This utility model specifically relates to a controllable flow channel injection mold. Background Technology

[0002] In existing injection molding processes, injection molds are indispensable key equipment for achieving high-precision and high-quality product manufacturing. Traditional injection molds typically consist of a lower mold assembly and an upper mold assembly that fit together to form a runner for injecting molten plastic material and a closed cavity. The cavity is used to contain the molten plastic material injected from the main runner and distributed to the corners of the cavity through the branch runners. In practical applications, to save costs and improve production efficiency, different parts of the same product often need to be injection molded in the same mold, or parts of the same series of products but with different shapes need to be injection molded in the same mold. Especially when the product parts themselves are small in size, most products use molds that can simultaneously injection mold multiple different parts in the same mold. This leads to a problem that is difficult to control: the same mold can produce various parts that match the cavity in each injection molding process. However, the production frequency of each part is not the same. For example, a mold can injection mold four parts A, B, C, and D. In the first quarter, the demand for the four parts is equal, so the mold can injection mold all four parts at the same time. In the second quarter, only parts A, B, and C are needed, while part D is not needed or the demand is less than the first three. If the mold continues to injection mold all four parts at the same time, some parts D will become redundant and wasteful. Redesigning and creating a new mold will also waste mold manufacturing costs. Therefore, because traditional molds are difficult to control the number of parts injection molded in the same mold, it is easy to waste production materials and make it difficult to control the production rhythm.

[0003] This utility model was developed precisely because of the aforementioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a controllable flow channel injection mold that can accurately inject and avoid material waste.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model provides a controllable runner injection mold, including a lower mold assembly and an upper mold assembly that can approach and close together to form a cavity for the injection molded product. At least one of the lower mold assembly and the upper mold assembly is provided with a runner groove, so that after they are closed, they form a main runner and at least two branch runners connecting the main runner and the cavity. At least one of the lower mold assembly and the upper mold assembly is rotatably connected to a runner adjusting component. The runner adjusting component is inserted into the branch runner and can block the branch runner. The runner adjusting component is provided with a control channel. When the runner adjusting component rotates at a preset angle, the control channel connects with the branch runner.

[0007] As described above, in the controllable flow channel injection mold, both the lower mold assembly and the upper mold assembly are provided with flow channel grooves, and both the lower mold assembly and the upper mold assembly are rotatably connected with flow channel adjustment components.

[0008] As described above, in the controllable runner injection mold, both the lower mold assembly and the upper mold assembly are provided with assembly holes that communicate with the branch runner. The runner adjustment component passes through the assembly hole and can rotate relative to the lower mold assembly or the upper mold assembly. The end of the runner adjustment component is inserted into the branch runner, and the ends of the runner adjustment components on the lower mold assembly and the upper mold assembly abut against each other. The control channel is an arc-shaped groove provided on the end face of the runner adjustment component. The end face of the runner adjustment component is also provided with a tool hole for inserting a tool body to twist the runner adjustment component.

[0009] As described above, the controllable flow channel injection mold has a cylindrical mounting boss at the root of the flow channel adjustment component. The lower mold assembly includes a lower template and a lower mold insert embedded in the lower template. The upper mold assembly includes an upper template and an upper mold insert embedded in the upper template. The upper surface of the lower mold insert is provided with the flow channel groove, and the lower surface of the upper mold insert is provided with the flow channel groove. Both the lower mold insert and the upper mold insert are provided with mounting countersunk holes that communicate with the assembly hole and are used to accommodate the mounting boss.

[0010] In the controllable flow channel injection mold described above, the tool hole is a polygonal hole.

[0011] In the controllable flow channel injection mold described above, the tool hole is a regular hexagonal countersunk hole.

[0012] In the controllable flow channel injection mold described above, the arc-shaped groove matches the shape of the flow channel, the tool hole depth is H1, the flow channel depth is H2, and the difference between H1 and H2 is ΔH = H1 - H2, so ΔH is 2-4mm.

[0013] The controllable runner injection mold described above further includes a lower mold fixing plate and an upper mold fixing plate that can slide up and down relative to the lower mold fixing plate. The lower mold assembly is connected to the lower mold fixing plate, and the upper mold assembly is connected to the upper mold fixing plate. The lower mold fixing plate is connected to a lifting seat that can slide up and down relative to it. The lifting seat is provided with ejector pins, and the ends of the ejector pins extend to the runner groove or cavity of the lower mold assembly, so that when the lifting seat moves upward, the injection-molded product and runner can be ejected.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The injection mold of this invention has a branch channel communicating with the cavity. The branch channel is designed as a controllable channel. Specifically, a channel adjustment component is inserted into the branch channel. Under normal circumstances, the channel adjustment component can block the flow of the branch channel. By rotating the channel adjustment component, the control channel on the channel adjustment component is aligned and connected with the branch channel, thereby enabling the branch channel to flow. This allows control over the opening or closing of a portion of the branch channel. In molds for injection molding multiple parts, it is possible to precisely control the injection of some cavities while leaving others un-injected, avoiding the production of redundant parts and resulting in significant material waste, thus better controlling the production rhythm. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the controllable flow channel injection mold of this utility model;

[0017] Figure 2 This is a top view schematic diagram of the controllable flow channel injection mold of this utility model;

[0018] Figure 3 yes Figure 2 A cross-sectional view of the PP section;

[0019] Figure 4 This is a schematic diagram illustrating the principle of the controllable flow channel injection mold of this utility model;

[0020] Figure 5 This is a partial structure of the controllable flow channel injection mold of this utility model;

[0021] Figure 6 This is a cross-sectional schematic diagram of the flow channel adjustment component of this utility model;

[0022] Figure 7 This is a partial cross-sectional schematic diagram of the flow channel adjustment component according to Embodiment 2 of this utility model; Detailed Implementation

[0023] The utility model will be further described below with reference to the accompanying drawings:

[0024] The orientations described in this utility model specification, such as "up," "down," "left," "right," "front," and "back," are based on the orientations in the accompanying drawings and are intended to facilitate the description of the relationships between the various components. They do not indicate the unique or absolute positional relationships between the various components, but are merely one embodiment of the utility model and are not a limitation on its implementation.

[0025] Example 1

[0026] This utility model provides a controllable flow channel injection mold, such as Figures 1 to 3 As shown, this type of injection mold includes a lower mold assembly 1 and an upper mold assembly 2 that can approach and close together. Generally, both the lower mold assembly 1 and the upper mold assembly 2 are provided with cavities, so that when they are closed, they can form a cavity A for injecting molten plastic material to form a product. In some cases, a cavity can be provided in either the lower mold assembly 1 or the upper mold assembly 2. For example... Figure 2 As shown, when the lower mold assembly 1 and the upper mold assembly 2 are joined together, they form at least two cavities A, as follows: Figure 5 As shown, the lower mold assembly 1 has a runner channel B, and similarly, the upper mold assembly 2 also has a runner channel B. When the two are joined together, they form a main runner 30, and at least two branch runners 31 connect the main runner 30 to the cavity A. Each branch runner 31 corresponds to one cavity A. Figure 3 As shown, both the lower mold assembly 1 and the upper mold assembly 2 are rotatably connected to a flow channel adjusting component 4. The flow channel adjusting component 4 is inserted into the branch flow channel 31 and can block the branch flow channel 31. The flow channel adjusting component 4 is provided with a control channel 40. When the flow channel adjusting component 4 rotates at a preset angle, the control channel 40 is connected to the branch flow channel 31.

[0027] In detail, such as Figures 3 to 6As shown, both the lower mold assembly 1 and the upper mold assembly 2 are provided with assembly holes 401 communicating with the branch channel 31. The flow channel adjusting member 4 passes through the assembly hole 401 and can rotate relative to the lower mold assembly 1 or the upper mold assembly 2. The end of the flow channel adjusting member 4 is inserted into the branch channel 31, and the ends of the flow channel adjusting members 4 on the lower mold assembly 1 and the upper mold assembly 2 are mutually abutting and engaged. The control channel 40 is an arc-shaped groove provided on the end face of the flow channel adjusting member 4. The end face of the flow channel adjusting member 4 is also provided for inserting a tool body. The tool hole 41 of the flow channel adjusting component 4 is twisted. In this embodiment, the tool hole 41 is a regular hexagonal countersunk hole, and the tool body can be a regular hexagonal screwdriver or an Allen wrench. Of course, it can also be an equilateral triangular hole or other polygonal hole. In this way, by inserting the tool into the tool hole 41 and twisting the flow channel adjusting component 4, the control channel 40 is aligned and connected with the branch channel 31, or the flow channel adjusting component 4 is twisted to make the control channel 40 and the branch channel 31 misaligned. Therefore, the above-mentioned preset angle is generally 60° to 120°. For example, the flow channel adjusting component 4 is rotated 90°. Figure 4 As shown, the flow channel adjustment component 4 can control the channel 40 to rotate from a state aligned with and connected to the branch channel 31 to a state offset from the branch channel 31 during filling, thereby controlling the branch channel 31 to be open or closed. When a part of cavity A does not need to be injected, the branch channel 31 connected to cavity A can be closed. In a mold that can inject multiple parts, it is possible to precisely control the injection of some cavities A and not to inject some cavities A, avoiding the production of redundant parts and causing great waste of materials, thereby better controlling the production rhythm.

[0028] As a preferred option, such as Figure 3 and Figure 5 As shown, the flow channel adjusting component 4 has a cylindrical mounting boss 42 at its root. The lower mold assembly 1 includes a lower template 11 and a lower mold insert 12 embedded in the lower template 11. The upper mold assembly 2 includes an upper template 21 and an upper mold insert 22 embedded in the upper template 21. The upper surface of the lower mold insert 12 is provided with the flow channel groove, and the lower surface of the upper mold insert 22 is provided with the flow channel groove. Both the lower mold insert 12 and the upper mold insert 22 are provided with mounting countersunk holes 402 that communicate with the assembly hole 401 and are used to accommodate the mounting boss 42, so that the flow channel adjusting component 4 can be stably installed on the lower mold assembly 1 and the upper mold assembly 2.

[0029] As a preferred option, such as Figure 6 As shown, the arc-shaped groove matches the shape of the flow channel groove. The depth of the tool hole 41 is H1, and the depth of the flow channel groove is H2. The difference between H1 and H2 is ΔH = H1 - H2, so ΔH is 2-4mm. This not only does not hinder the flow of molten plastic material in the branch channel 31, but also allows the tool to be inserted into the tool hole 41 and be subjected to stable force.

[0030] To be more specific, such as Figure 2 As shown, it also includes a lower mold fixing plate 5 and an upper mold fixing plate 6 that can slide up and down relative to the lower mold fixing plate 5. The lower mold assembly 1 is connected to the lower mold fixing plate 5, and the upper mold assembly 2 is connected to the upper mold fixing plate 6. The lower mold fixing plate 5 is connected to a lifting seat 7 that can slide up and down relative to it. The lifting seat 7 is provided with ejector pins 8. The ends of the ejector pins 8 extend to the runner groove or cavity of the lower mold assembly 1, so that when the lifting seat 7 moves upward, it can eject the injection-molded product and runner.

[0031] Example 2

[0032] like Figure 7 As shown, in this embodiment, the difference from Embodiment 1 is that only the lower mold assembly 1 has a flow channel groove B, and the flow channel adjusting member 4 is only provided on the lower mold assembly 1. After the lower mold assembly 1 and the upper mold assembly 2 are closed, the flow channel groove B on the lower mold assembly 1 and the upper mold assembly 2 can also form a main flow channel 30 and a branch flow channel 31, as long as the end of the flow channel adjusting member 4 extends into the branch flow channel 31.

[0033] Alternatively, the flow channel groove B can be provided only on the upper mold assembly 2, and the flow channel adjustment component 4 can also be provided only on the upper mold assembly 2. The principle is the same as the above scheme, but the view is not shown and will not be described in detail.

[0034] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A controllable runner injection mold, comprising a lower mold assembly (1) and an upper mold assembly (2) capable of closing close to each other, the two closing together to form a cavity for an injection molded product, wherein at least one of the lower mold assembly (1) and the upper mold assembly (2) is provided with a runner groove, such that after closing together they form a main runner (30) and at least two branch runners (31) connecting the main runner (30) and the cavity, characterized in that: At least one of the lower mold assembly (1) and the upper mold assembly (2) is rotatably connected to a flow channel adjustment component (4). The flow channel adjustment component (4) is inserted into the branch flow channel (31) and can block the branch flow channel (31). The flow channel adjustment component (4) is provided with a control channel (40). When the flow channel adjustment component (4) rotates at a preset angle, the control channel (40) is connected to the branch flow channel (31).

2. The controllable flow channel injection mold according to claim 1, characterized in that: Both the lower mold assembly (1) and the upper mold assembly (2) are provided with flow channel grooves, and both the lower mold assembly (1) and the upper mold assembly (2) are rotatably connected with flow channel adjustment components (4).

3. The controllable flow channel injection mold according to claim 2, characterized in that: The lower mold assembly (1) and the upper mold assembly (2) are both provided with assembly holes (401) that communicate with the branch channel (31). The flow channel adjustment component (4) passes through the assembly hole (401) and can rotate relative to the lower mold assembly (1) or the upper mold assembly (2). The end of the flow channel adjustment component (4) is inserted into the branch channel (31), and the ends of the flow channel adjustment component (4) on the lower mold assembly (1) and the flow channel adjustment component (4) on the upper mold assembly (2) are in close contact with each other. The control channel (40) is an arc-shaped groove provided on the end face of the flow channel adjustment component (4). The end face of the flow channel adjustment component (4) is also provided with a tool hole (41) for inserting a tool body and twisting the flow channel adjustment component (4).

4. The controllable flow channel injection mold according to claim 3, characterized in that: The flow channel adjusting component (4) has a cylindrical mounting boss (42) at its root. The lower mold assembly (1) includes a lower template (11) and a lower mold insert (12) embedded in the lower template (11). The upper mold assembly (2) includes an upper template (21) and an upper mold insert (22) embedded in the upper template (21). The upper surface of the lower mold insert (12) is provided with the flow channel groove, and the lower surface of the upper mold insert (22) is provided with the flow channel groove. Both the lower mold insert (12) and the upper mold insert (22) are provided with mounting countersunk holes (402) that communicate with the assembly hole (401) and are used to accommodate the mounting boss (42).

5. The controllable flow channel injection mold according to claim 3, characterized in that: The tool hole (41) is a polygonal hole.

6. The controllable flow channel injection mold according to claim 3, characterized in that: The tool hole (41) is a regular hexagonal countersunk hole.

7. The controllable flow channel injection mold according to claim 3, characterized in that: The arc-shaped groove matches the shape of the flow channel groove. The tool hole (41) has a depth of H1 and the flow channel groove has a depth of H2. The difference between H1 and H2 is ΔH = H1 - H2, so ΔH is 2-4 mm.

8. The controllable flow channel injection mold according to claim 1, characterized in that: It also includes a lower mold fixing plate (5) and an upper mold fixing plate (6) that can slide up and down relative to the lower mold fixing plate (5). The lower mold assembly (1) is connected to the lower mold fixing plate (5), and the upper mold assembly (2) is connected to the upper mold fixing plate (6). The lower mold fixing plate (5) is connected to a lifting seat (7) that can slide up and down relative to it. The lifting seat (7) is provided with ejector pins (8). The ends of the ejector pins (8) extend to the runner groove or cavity of the lower mold assembly (1), so that when the lifting seat (7) moves upward, the injection-molded product and runner can be ejected.

Images