A wave-shaped diverging runner system for an ultra-multiple cavity product

Abstract

The application provides a wave-shaped distribution channel system for a super-multi-mode cavity product, which has an inwardly concave wave-shaped flow channel wall, and the two sides of the wave-shaped flow channel wall are oppositely inclined to the corresponding connected vertical flow channels. Compared with the prior art, the angle between the horizontal flow channel and the vertical flow channel is controlled through the wave-shaped structure of the wave-shaped flow channel wall, so that the shear on the molten glue is reduced, and the size of the shear can be controlled through the angle, thereby facilitating the regulation of the generated backflow, and making the temperature and pressure of the molten glue more uniform. Moreover, the inner surface shape of the wave-shaped flow channel wall is a smooth transition surface, which can further reduce the shear.

Description

Technical Field

[0001] This invention relates to the field of injection molding technology, and more specifically, to a wave-shaped runner system for multi-cavity products. Background Technology

[0002] During polymer injection molding, molten plastic rapidly enters the runner under injection pressure and is then poured into the mold cavity. Existing gating systems typically require minimal pressure loss to ensure even distribution of injection pressure throughout the mold cavity, resulting in plastic products with clear shapes and high quality. Therefore, the length-to-diameter ratio of each runner is designed to be as small as possible.

[0003] However, for multi-cavity products with more than 500 cavities, the sheer number of mold cavities necessitates sufficient length from the main runner to improve injection efficiency. This results in a large length-to-diameter ratio for the secondary runners and significant pressure loss at the runner junctions, requiring a higher injection pressure. However, the uneven temperature and pressure during melt flow between the runners lead to inconsistent product performance, with some products failing to meet performance requirements. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a wave-shaped runner system for ultra-multi-cavity products, which is suitable for casting ultra-multi-cavity products with more than 500 cavities. The specific technical solution is as follows:

[0005] A wave-shaped flow channel system for multi-cavity products includes: a main flow channel, a flow channel, multiple crossflow channels, and multiple vertical flow channels. The flow channels are connected to the main flow channel. The multiple vertical flow channels are configured in multiple groups, with each group having more than one vertical flow channel. The crossflow channels are distributed and connected between each pair of adjacent groups of vertical flow channels. The flow channel is connected to one of the crossflow channels, so that the flow channel can transport materials to each group of vertical flow channels via the crossflow channels.

[0006] The crossflow channel connected to the branch channel is configured as a near-end crossflow channel, and the crossflow channel away from the near end is a far-end crossflow channel. From the near-end crossflow channel to the far-end crossflow channel, each crossflow channel has an inwardly concave wavy channel wall. The two sides of the wavy channel wall are respectively inclined relative to the corresponding connected vertical channel, and the inner surface of the wavy channel wall is a smooth transition surface.

[0007] In one specific embodiment, the two sides of the wavy flow channel wall are symmetrical, such that the inclination angle between two adjacent sets of vertical flow channels and the wavy flow channel wall is the same.

[0008] In one specific embodiment, the concavity of each of the wavy channel walls is the same from the proximal end to the distal end of the cross channel, such that the inclination angles of both sides of each of the wavy channel walls are the same as those of the corresponding connected vertical channels.

[0009] In one specific embodiment, from the near end of the crossflow channel to the far end of the crossflow channel, the degree of concavity of each of the wavy channel walls gradually decreases, so that the inclination angle between the two sides of each of the wavy channel walls and the corresponding connected vertical channel gradually decreases.

[0010] In one specific embodiment, the inclination angle between the two sides of the corrugated channel wall between the near-end crossflow channel and the far-end crossflow channel and the corresponding vertical channel is .

[0011] Ai = (Al + Ak) * i / k,

[0012] Where A1 is the inclination angle between the two sides of the wavy channel wall at the near end and the connected vertical channel, Ak is the inclination angle between the two sides of the wavy channel wall at the far end and the connected vertical channel, A1≥Ak, i is the number of cross channels counting from the i-th cross channel at the near end, k is the total number of cross channels from the cross channel at the near end to the cross channel at the far end, k≥i, and Ai is the inclination angle between the two sides of the i-th wavy channel wall and the connected vertical channel.

[0013] In one specific embodiment, the inclination angle between the two sides of the near-end corrugated flow channel wall and the connected vertical flow channel is less than 150°, and the inclination angle between the two sides of the far-end corrugated flow channel wall and the connected vertical flow channel is greater than 90°.

[0014] In one specific embodiment, the flow channel includes a primary flow channel and a secondary flow channel. The main flow channel connects to multiple primary flow channels, each primary flow channel connects to multiple secondary flow channels, and the secondary flow channels connect to the crossflow channel.

[0015] In one specific embodiment, the set of vertical flow channels and the plurality of cross flow channels are combined to form a multi-row casting assembly, each row of casting assembly having a plurality of sets of vertical flow channels, and the secondary flow channels are distributed between every two adjacent rows of casting assemblies and respectively connect to the cross flow channels on every two rows of casting assemblies.

[0016] In one specific embodiment, a set of vertical flow channels includes one vertical flow channel.

[0017] In one specific embodiment, a set of the vertical flow channels includes two or more of the vertical flow channels bundled together.

[0018] In one specific embodiment, the length of the inwardly recessed region of the wavy channel wall is equal to the distance between two adjacent sets of the vertical channels.

[0019] The present invention has at least the following beneficial effects:

[0020] In this invention, the corrugated flow channel wall is concave inward, and its two sides are inclined relative to the corresponding connected vertical flow channels. Thus, the angle between the horizontal and vertical flow channels is controlled by the corrugated structure of the flow channel wall, thereby reducing the shear stress on the molten material and allowing for control of the shear magnitude. This facilitates the regulation of backflow and results in more uniform temperature and pressure throughout the molten material. Furthermore, the smooth transition surface of the inner surface of the corrugated flow channel wall further reduces shear stress.

[0021] Furthermore, the molten adhesive in the crossflow channel is subjected to greater shear at the distal end and less shear at the proximal end, thereby making the overall temperature and pressure of the molten adhesive more uniform.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an overall schematic diagram of the wave-shaped flow channel system for the multi-cavity product in Example 1;

[0025] Figure 2 yes Figure 1 A schematic diagram of the left-center region;

[0026] Figure 3 This is a schematic diagram of the connection between the crossflow channel and the vertical flow channel in Example 1;

[0027] Figure 4 yes Figure 3 A magnified view of a portion of area A in the middle;

[0028] Figure 5 yes Figure 3 A magnified view of a portion of the area at point B in the middle;

[0029] Figure 6 yes Figure 3 A magnified view of the area at point C.

[0030] Explanation of key component symbols:

[0031] 1-Mainstream Road;

[0032] 2- Primary distribution channel;

[0033] 3-Secondary diversion channel;

[0034] 4-Wave-shaped flow channel wall;

[0035] 5-Vertical flow channel;

[0036] 6-Proximal crossflow channel;

[0037] 7- The distal crossflow channel;

[0038] 8-Crossflow channel at the middle end. Detailed Implementation

[0039] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0040] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] The expressions used in the various embodiments of the present invention (such as "first," "second," etc.) may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, a first element may be referred to as a second element without departing from the scope of the various embodiments of the present invention, and similarly, a second element may also be referred to as a first element.

[0042] It should be noted that, in this invention, unless otherwise explicitly specified and defined, terms such as "installation," "connection," and "fixation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0043] Example 1

[0044] like Figure 1 , Figure 2 As shown, this embodiment provides a wave-shaped flow channel system for multi-cavity products, including: a main flow channel 1, a flow channel, multiple cross flow channels and multiple vertical flow channels 5. The flow channel is connected to the main flow channel 1. The multiple vertical flow channels 5 are set in multiple groups, with each group having more than one vertical flow channel 5. The cross flow channels are distributed and connected between each pair of adjacent groups of vertical flow channels 5. The flow channel is connected to one of the cross flow channels, so that the flow channel can transport materials to each group of vertical flow channels 5 through the cross flow channels.

[0045] The flow channel includes primary flow channels 2 and secondary flow channels 3, with the main flow channel 1 connecting to multiple primary flow channels 2. For example, the main flow channel 1 connects to two primary flow channels 2, one located to the left of the main flow channel 1 and the other to the right. Each primary flow channel 2 connects to multiple secondary flow channels 3, which in turn connect to crossflow channels.

[0046] like Figure 1 , Figure 2 As shown, multiple sets of vertical flow channels 5 and multiple cross flow channels are combined to form multiple rows of casting components. Each row of casting components has multiple sets of vertical flow channels 5. Secondary flow channels 3 are distributed between every two adjacent rows of casting components and are respectively connected to the cross flow channels on each two rows of casting components. Thus, the molten adhesive conveyed by the main flow channel 1 passes through the primary flow channel 2, the secondary flow channel 3, and the cross flow channel in sequence before entering the vertical flow channel 5, realizing the casting of multiple mold cavities.

[0047] like Figure 1 , Figure 2 As shown, a set of vertical runners 5 includes four vertical runners 5 bundled together, arranged in two rows, with two vertical runners 5 in each row. This further enables the casting of multiple mold cavities. Compared with existing technologies, while achieving multiple mold cavity casting, it also reduces the total length of intermediate runners such as branch runners and cross runners, reducing pressure loss caused by excessively long intermediate runners, and reducing pressure and temperature changes caused by shearing at multiple connection points.

[0048] It should be noted that in this embodiment, a set of vertical flow channels 5 including four vertical flow channels 5 bundled together is a preferred arrangement of vertical flow channels 5. In other embodiments, a set of vertical flow channels 5 may also include two or more vertical flow channels 5 bundled together, such as four.

[0049] In this embodiment, the crossflow channel connected to the branch channel is configured as the near-end crossflow channel 6, and the crossflow channel away from the near-end crossflow channel 6 is configured as the far-end crossflow channel 7. Correspondingly, the crossflow channel between the near-end crossflow channel 6 and the far-end crossflow channel 7 is configured as the middle-end crossflow channel 8. From the near-end crossflow channel 6 to the far-end crossflow channel 7, each crossflow channel has an inwardly concave wavy channel wall 4. The two sides of the wavy channel wall 4 are respectively inclined relative to the corresponding connected vertical channel 5, and the inner surface of the wavy channel wall 4 is a smooth transition surface.

[0050] Therefore, by controlling the angle between the transverse and vertical channels 5 through the corrugated channel wall 4 structure of the transverse channel, the shear force experienced by the molten adhesive is reduced, and the magnitude of the shear force can be controlled by the tilt angle. This facilitates the regulation of the resulting backflow and makes the overall temperature and pressure of the molten adhesive more uniform. Moreover, the inner surface of the corrugated channel wall 4 has a smooth transition surface shape, which can further reduce shear force.

[0051] Preferably, the two sides of the corrugated flow channel wall 4 are symmetrical, such that the inclination angle between two adjacent sets of vertical flow channels 5 and the corrugated flow channel wall 4 is the same. Specifically, between two adjacent sets of vertical flow channels 5, the inclination angle between one side of the corrugated flow channel wall 4 and one set of vertical flow channels 5 and the inclination angle between the other side of the corrugated flow channel wall 4 and another set of vertical flow channels 5 are the same.

[0052] like Figures 3-6 As shown, from the near end of the cross channel 6 to the far end of the cross channel 7, the degree of concavity of each corrugated channel wall 4 gradually decreases, causing the inclination angle between the two sides of the corrugated channel wall 4 and the corresponding connected vertical channels 5 to gradually decrease. This results in the molten material in the cross channel experiencing greater shear at the far end and less shear at the near end, thus making the overall temperature and pressure of the molten material more uniform.

[0053] Specifically, the inclination angle between the two sides of the corrugated channel wall 4 between the near-end crossflow channel 6 and the far-end crossflow channel 7 and the corresponding vertical channel 5 is as follows:

[0054] Ai = (Al + Ak) * i / k,

[0055] Where A1 is the inclination angle between the two sides of the near-end corrugated flow channel wall 4 and the connected vertical flow channel 5, Ak is the inclination angle between the two sides of the far-end corrugated flow channel wall 4 and the connected vertical flow channel 5, A1≥Ak, i is the number of crossflow channels counting from the near-end crossflow channel 6, k is the total number of crossflow channels from the near-end crossflow channel 6 to the far-end crossflow channel 7, k≥i, and Ai is the inclination angle between the two sides of the i-th corrugated flow channel wall 4 and the connected vertical flow channel 5. Based on this inclination angle relationship formula, the temperature and pressure of the molten adhesive can be made more uniform.

[0056] In this embodiment, the inclination angle between the two sides of the near-end corrugated flow channel wall 4 and the connected vertical flow channel 5 is less than 150°, and the inclination angle between the two sides of the far-end corrugated flow channel wall 4 and the connected vertical flow channel 5 is greater than 90°.

[0057] In this embodiment, the length of the inwardly recessed region of the wavy flow channel wall 4 is equal to the distance between two adjacent sets of vertical flow channels 5.

[0058] Example 2

[0059] Compared with Example 1, the main difference in this example is:

[0060] In this embodiment, the concavity of each wavy channel wall is the same from the near end to the far end (not shown in the figure), so that the two sides of the wavy channel wall have the same inclination angle as the corresponding connected vertical channel.

[0061] Other features in this embodiment are the same as in Embodiment 1, and will not be repeated here.

[0062] Example 3

[0063] Compared with Example 1, the main difference in this example is:

[0064] In this embodiment, a set of vertical flow channels includes one vertical flow channel (not shown in the figure).

[0065] Other features in this embodiment are the same as in Embodiment 1, and will not be repeated here.

[0066] As will be understood by those skilled in the art, the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing the present invention.

[0067] Those skilled in the art will understand that the modules in the apparatus of the implementation scenario can be distributed within the apparatus of the implementation scenario as described, or they can be located in one or more apparatuses different from this implementation scenario, with corresponding changes. The modules of the above-described implementation scenario can be combined into one module, or they can be further divided into multiple sub-modules.

[0068] The serial numbers of the present invention mentioned above are for descriptive purposes only and do not represent the superiority or inferiority of the implementation scenarios.

[0069] The above-disclosed examples are only a few specific implementation scenarios of the present invention. However, the present invention is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A wave-shaped flow channel system for multi-cavity products, characterized in that, include: The system includes a main channel, branch channels, multiple cross channels, and multiple vertical channels. The branch channels are connected to the main channel. The multiple vertical channels are configured in multiple groups, with each group having one or more vertical channels. The cross channels are distributed and connected between each pair of adjacent groups of vertical channels. The branch channels are connected to one of the cross channels, so that the branch channels can transport materials to each group of vertical channels via the cross channels. The crossflow channel connected to the branch channel is configured as the near-end crossflow channel, and the crossflow channel away from the near end is configured as the far-end crossflow channel. From the near-end crossflow channel to the far-end crossflow channel, each crossflow channel has an inwardly concave wavy channel wall. The two sides of the wavy channel wall are respectively inclined relative to the corresponding connected vertical channel, and the inner surface of the wavy channel wall is a smooth transition surface. From the near end of the crossflow channel to the far end of the crossflow channel, the degree of concavity of each of the wavy channel walls gradually decreases, so that the inclination angle between the two sides of each of the wavy channel walls and the corresponding connected vertical channel gradually decreases. The two sides of the wavy flow channel wall are symmetrical, so that the inclination angle between two adjacent sets of vertical flow channels and the wavy flow channel wall is the same; The inclination angle between the two sides of the wavy channel wall between the near-end and far-end crossflow channels and the corresponding vertical channel is . ， Where A1 is the inclination angle between the two sides of the wavy channel wall at the near end and the connected vertical channel, Ak is the inclination angle between the two sides of the wavy channel wall at the far end and the connected vertical channel, A1≥Ak, i is the number of cross channels counting from the i-th cross channel at the near end, k is the total number of cross channels from the cross channel at the near end to the cross channel at the far end, k≥i, and Ai is the inclination angle between the two sides of the i-th wavy channel wall and the connected vertical channel. The inclination angle between the two sides of the wavy flow channel wall at the near end and the connected vertical flow channel is less than 150°, and the inclination angle between the two sides of the wavy flow channel wall at the far end and the connected vertical flow channel is greater than 90°.

2. The wave-shaped flow channel system for multi-cavity products according to claim 1, characterized in that, The diversion channel includes a primary diversion channel and a secondary diversion channel. The main channel connects to multiple primary diversion channels, each primary diversion channel connects to multiple secondary diversion channels, and the secondary diversion channels connect to the crossflow channel.

3. The wave-shaped flow channel system for multi-cavity products according to claim 2, characterized in that, Multiple sets of vertical flow channels and multiple sets of horizontal flow channels are combined to form multiple rows of casting assemblies. Each row of casting assemblies has multiple sets of vertical flow channels. The secondary flow channels are distributed between every two adjacent rows of casting assemblies and are respectively connected to the horizontal flow channels on every two rows of casting assemblies.

4. The wave-shaped flow channel system for multi-cavity products according to claim 1, characterized in that, A set of the vertical flow channels includes one vertical flow channel.

5. The wave-shaped flow channel system for multi-cavity products according to claim 1, characterized in that, A set of the vertical flow channels includes two or more of the vertical flow channels bundled together.

6. The wave-shaped flow channel system for multi-cavity products according to claim 1, characterized in that, The length of the inwardly recessed region of the wavy flow channel wall is equal to the distance between two adjacent sets of vertical flow channels.

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