Multi-cavity hot runner system

Abstract

The utility model discloses a multi-cavity hot runner system, which relates to the technical field of hot runners and comprises a shell component, a splitter plate, a main nozzle, a plurality of groups of hot nozzles, cavities, a push plate and an air cylinder are arranged in the shell component, the main nozzle and the hot nozzles are respectively mounted at two ends of the splitter plate, the hot nozzles are connected with the cavities, valve needles are sleeved in the hot nozzles and connected with the push plate, and the push plate is connected with the push plate. The push plate is connected with the air cylinder, a layer of sub-runner is arranged in the splitter plate, and the layer of sub-runner is respectively communicated with the main nozzle and the hot nozzle; when a plastic material enters the hot nozzle from the main injection nozzle, the push plate is driven by the air cylinder to ascend to drive the valve needle to ascend in the hot nozzle, so that the hot nozzle is communicated with the cavity, and the plastic material enters the cavity to form a product. According to the utility model, the problems of dead angles and residual glue of the sub-runner are avoided, the runner is convenient to switch over, manufacture and process, the runner is suitable for molds for large-batch production of small products, the cavity gap of a mold product is smaller, and glue inlet points of a hot runner system are compactly arranged, the cost is lower, and the applicability is stronger.

Description

Technical Field

[0001] This utility model relates to the field of hot runner technology, and in particular to a multi-cavity hot runner system. Background Technology

[0002] Existing hot runner systems typically have two or more layers of manifolds within the manifold. In this case, the plastic material, after flowing vertically from the main nozzle, undergoes multiple transfers as it passes through the manifold. If there are two layers of manifolds, the plastic material needs to undergo a horizontal transfer before flowing vertically again and being divided by the manifolds. In this situation, dead zones can easily form at the transfer points, leading to plastic residue issues. Furthermore, this multi-layered manifold design increases processing difficulty and costs.

[0003] Therefore, a new hot runner system needs to be designed to avoid the above problems. Utility Model Content

[0004] In view of the above-mentioned shortcomings, this utility model provides a multi-cavity hot runner system, which avoids the problems of dead corners and residual glue in the runner. The runner is easy to connect and easy to manufacture. It is suitable for molds for mass production of small products, where the cavity clearance of the mold product is small and the glue inlet points of the hot runner system are arranged compactly. It has lower cost and stronger applicability.

[0005] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0006] A multi-cavity hot runner system includes a housing assembly. The housing assembly contains a manifold, a main nozzle, several sets of hot nozzles, a cavity, a pusher plate, and a cylinder. The main nozzle and hot nozzles are respectively installed at both ends of the manifold, and the hot nozzles are connected to the cavities. A valve needle is fitted inside each hot nozzle and is connected to the pusher plate, which is connected to the cylinder. The manifold has a layer of flow channels that communicate with both the main nozzle and the hot nozzles. When plastic material enters the hot nozzle from the main nozzle, the cylinder drives the pusher plate to rise, causing the valve needle to rise within the hot nozzle, thus connecting the hot nozzle to the cavity and allowing the plastic material to enter the cavity to form a product.

[0007] According to one aspect of the present invention, the hot nozzles are arranged in a row on a distributor plate, and a group of hot nozzles has at least five nozzles and they are evenly spaced from each other.

[0008] According to one aspect of the present invention, there are eight sets of hot nozzles, which are arranged in a regular manner on the distributor plate.

[0009] According to one aspect of the present invention, a heating wire is embedded in the heating nozzle and the heating wire is wound around the heating nozzle.

[0010] According to one aspect of the present invention, the housing assembly is provided with a socket and a solenoid valve, the socket being connected to a heating wire and the solenoid valve being connected to a cylinder.

[0011] According to one aspect of the present invention, a plurality of pads are fixed at both ends of the push plate, and a plurality of support columns are provided inside the push plate.

[0012] According to one aspect of the present invention, the outer shell assembly is provided with a plurality of middle supports, and the push plate is sleeved on the middle supports.

[0013] According to one aspect of the present invention, the outer shell assembly includes a top plate, a first template, a second template, and a bottom plate connected sequentially from top to bottom, the push plate is disposed between the top plate and the first template, the cylinder is installed in the first template, and the flow divider is installed in the second template.

[0014] According to one aspect of the present invention, the top plate, the first template, the second template, and the bottom plate are connected in sequence by locking screws. The first template is connected to a middle support, one end of which is located inside the top plate. The push plate is sleeved on the middle support by a guide sleeve.

[0015] According to one aspect of the present invention, the multi-cavity hot runner system further includes guide posts, which are fixed around the base plate.

[0016] The advantages of this invention are as follows: When the plastic material enters the hot runner from the main nozzle, the push plate is driven upward by the cylinder, which in turn drives the valve needle to rise within the hot runner, connecting the hot runner to the mold cavity, thus allowing the plastic material to enter the cavity and form the product. By setting only one layer of runners within the manifold, when the plastic material in the main nozzle flows vertically down, it is directly diverted through this single runner and flows into several hot runners. Compared to the existing two-layer runner system, where the plastic material needs to flow vertically down, then horizontally, and then vertically down again to be diverted, this system eliminates dead zones and residual material. The runners are easy to connect, and the single-layer design simplifies manufacturing and reduces costs. With the hot runners arranged closely together, this system is suitable for molds used in large-volume production of small products, especially in molds with small cavity clearances and compact hot runner system injection points. This directly reduces mold production costs, solves the problem of injection molding machine stroke limitations, and enhances applicability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the first partial structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the second partial structure of the present invention;

[0021] Figure 4 This is a first partial cross-sectional view of the present invention;

[0022] Figure 5 This is a schematic diagram of the second partial cross-sectional structure of the present invention;

[0023] Figure 6 These are the front view and perspective view of a set of heat nozzles in a row according to this utility model.

[0024] The names corresponding to the serial numbers in the diagram are as follows:

[0025] 1. Outer shell assembly; 2. Manifold; 21. Manifold channel; 3. Main nozzle; 4. Hot nozzle; 5. Push plate; 6. Cylinder; 7. Socket; 8. Solenoid valve; 9. Gasket; 10. Support column; 11. Top plate; 12. First template; 13. Second template; 14. Base plate; 15. Center support; 16. Mold locking screw; 17. Guide column; 18. Guide sleeve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inner", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation of the present utility model.

[0027] like Figure 1 - Figure 6As shown, a multi-cavity hot runner system is designed for multi-cavity products and is suitable for molds used in the mass production of small products, especially when the cavity clearance of the mold product is small and the injection points of the hot runner system are arranged compactly. This system includes a housing assembly 1, a socket 7, a solenoid valve 8, and guide pillars 17. The housing assembly 1 contains a manifold 2, a main nozzle 3, several sets of hot nozzles 4, a cavity, a push plate 5, a cylinder 6, and several center supports 15. The socket 7 and solenoid valve 8 are fixed to the sides of the housing assembly 1. The guide pillars 17 are fixed around the bottom of the housing assembly 1. The main nozzle 3 and hot nozzles 4 are installed at the upper and lower ends of the manifold 2, respectively, with the bottom of the hot nozzles 4 connected to the cavity. A valve needle is fitted inside each hot nozzle 4, and the valve needle is connected to the push plate 5. The push plate 5 is connected to the cylinder 6. The manifold 2 contains only one layer of manifold 21 (e.g., Figure 4 , Figure 5 As shown, when the plastic material in the main nozzle 3 flows vertically down, it is directly diverted through the flow channel 21 of this layer and flows into several hot nozzles 4. Therefore, compared to the existing two-layer flow channel 21 system, where the plastic material needs to flow vertically down, then horizontally, and then vertically down again to be diverted by the flow channel 21, the flow channel 21 in this system does not have dead zones or residual plastic problems. Furthermore, having only one layer of flow channel 21 simplifies manufacturing and reduces costs. The push plate 5 is mounted on the middle support 15. When the plastic material enters the hot nozzle 4 from the main nozzle 3, the push plate 5 is driven upward by the cylinder 6, causing the valve needle to rise within the hot nozzle 4, thus connecting the hot nozzle 4 with the mold cavity, allowing the plastic material to enter the mold cavity and form the product.

[0028] Existing hot runner systems also have the problem of large spacing between each hot nozzle and large cavity clearance in mold products. Such hot runner systems cannot be used for multi-cavity products with small cavity clearance (such as interdental brushes, which have 40 cavities per mold and medium material flowability, and conventional hot runner or cold runner systems cannot guarantee the molding of their products), and the cost is also relatively high.

[0029] Therefore, based on the above-mentioned problems, such as Figure 3 , Figure 5 , Figure 6 As shown, this multi-cavity hot runner system arranges the hot nozzles 4 in a row on the manifold 2 in a compact manner. There are eight groups of hot nozzles 4, which are arranged in a regular manner on the manifold 2. Each group of hot nozzles 4 has at least five nozzles and they are evenly spaced apart from each other. In this way, the hot nozzles 4 of this system are arranged more tightly, and the injection points are more compact and extreme, which can solve the above problems. At the same time, it can directly reduce the mold production cost and solve the problem of the stroke limitation of the injection molding machine.

[0030] In practical applications, the manifold 2 is a single, integrally molded plate. Taking the main nozzle 3 in the center of the manifold 2 as a reference, the manifold 2 can be divided into a symmetrical left manifold area and a right manifold area, both of which are U-shaped. Two sets of hot nozzles 4 are installed at each end of the left manifold area, meaning ten hot nozzles 4 are installed at each end of the left manifold area. The arrangement of the right manifold area is the same and will not be described further. When the plastic material in the main nozzle 3 flows vertically down, since the manifold 2 only has one horizontal flow channel 21, the plastic material directly flows through this flow channel 21 and into the 40 hot nozzles 4.

[0031] In practical applications, the outer shell assembly 1 includes a top plate 11, a first template 12, a second template 13, and a bottom plate 14 connected sequentially from top to bottom by several locking screws 16. All four are roughly square plate structures, with the top plate 11 being a cover structure with a downward opening or cavity. The main injection nozzle 3 passes sequentially through the center of the top plate 11 and the center of the first template 12, and then connects to the hot nozzle 4 on the flow divider plate 2 through the flow divider channel 21. The push plate 5 is movably disposed between the top plate 11 and the first template 12, with two push plates 5 symmetrically arranged on the left and right sides of the main injection nozzle 3. The bottom end of the middle support 15 is installed and fixed inside the first template 12, and the top end of the middle support 15 extends out of the first template 12 and into the top plate 11, or in other words, the top end of the middle support 15 is exposed between the top plate 11 and the first template 12; the push plate 5 is sleeved on the middle support 15 through a guide sleeve 18, which is used for guiding the lifting and lowering of the push plate 5, while the guide sleeve 18 provides protective assistance. The cylinder 6 is installed in the first template 12, the flow divider 2 is installed in the second template 13, the guide post 17 is fixed around the bottom of the base plate 14, and the cavity is opened in the base plate 14.

[0032] In practical applications, the heating nozzle 4 has a built-in heating wire wound around it to ensure heating stability. Simultaneously, the distributor plate 2 and the main nozzle 3 are equipped with heating components, which can be heating coils used for heating the plastic material. The socket 7 is connected to the heating wire and heating components respectively; the socket 7 is connected to the power cord and temperature sensing wire of the external heater to control the heating temperature and heating time of the heating wire and heating components. The solenoid valve 8 is connected to the cylinder 6 via an external pipe, controlling the opening and closing of the cylinder 6, thereby controlling the lifting and lowering of the push plate 5.

[0033] In practical applications, several pads 9 are fixed on the upper and lower ends of the push plate 5. The pads 9 protect the push plate 5 when it is raised and lowered between the top plate 11 and the first template 12, and limit the stroke of the push plate 5. Four support columns 10 are installed through the push plate 5. The support columns 10 are fixed to the first template 12 by bolts. There are eight support columns 10 in total, which are used to prevent template deformation and ensure structural stability.

[0034] The advantages of this utility model are:

[0035] 1. By setting only one layer of distribution channel 21, the distribution channel 21 in this system will not have dead corners or residual glue problems. The channel is easy to connect. At the same time, making only one layer of distribution channel 21 is also easier to manufacture and process, resulting in lower costs.

[0036] 2. With the hot nozzles 4 arranged closely, this system is suitable for molds that produce small products in large batches, and is applicable to molds with small cavity clearances and compact hot runner system injection points. This can directly reduce mold production costs, solve the problem of injection molding machine stroke limitations, and has stronger applicability.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations, combinations, or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-cavity hot runner system, comprising a housing assembly (1), wherein the housing assembly (1) is provided with a manifold (2), a main nozzle (3), a plurality of hot nozzles (4), a cavity, a push plate (5), and a cylinder (6), wherein the main nozzle (3) and the hot nozzles (4) are respectively installed at both ends of the manifold (2), the hot nozzles (4) are connected to the cavity, a valve needle is sleeved inside the hot nozzles (4), the valve needle is connected to the push plate (5), and the push plate (5) is connected to the cylinder (6), characterized in that, The flow divider plate (2) is provided with a flow divider channel (21), which is connected to the main nozzle (3) and the hot nozzle (4) respectively. When the plastic material enters the hot nozzle (4) from the main nozzle (3), the push plate (5) is driven to rise by the cylinder (6), which drives the valve needle to rise in the hot nozzle (4), so that the hot nozzle (4) is connected to the cavity, thereby allowing the plastic material to enter the cavity and form a product.

2. The multi-cavity hot runner system according to claim 1, characterized in that, The hot nozzles (4) are arranged in a row on the distributor plate (2), and a group of hot nozzles (4) has at least five and are evenly spaced from each other.

3. The multi-cavity hot runner system according to claim 2, characterized in that, There are eight sets of hot nozzles (4), and the eight sets of hot nozzles (4) are arranged in a regular manner on the distributor plate (2).

4. The multi-cavity hot runner system according to claim 1, characterized in that, The heating nozzle (4) is embedded with a heating wire, which is wound around the heating nozzle (4).

5. The multi-cavity hot runner system according to claim 4, characterized in that, The housing assembly (1) is provided with a socket (7) and a solenoid valve (8). The socket (7) is connected to a heating wire, and the solenoid valve (8) is connected to a cylinder (6).

6. The multi-cavity hot runner system according to claim 1, characterized in that, Several pads (9) are fixed at both ends of the push plate (5), and several support columns (10) are provided inside the push plate (5).

7. The multi-cavity hot runner system according to claim 6, characterized in that, The outer shell assembly (1) is provided with a plurality of middle tors (15), and the push plate (5) is sleeved on the middle tors (15).

8. The multi-cavity hot runner system according to any one of claims 1 to 7, characterized in that, The outer shell assembly (1) includes a top plate (11), a first template (12), a second template (13), and a bottom plate (14) connected sequentially from top to bottom. The push plate (5) is located between the top plate (11) and the first template (12). The cylinder (6) is installed in the first template (12), and the diverter plate (2) is installed in the second template (13).

9. The multi-cavity hot runner system according to claim 8, characterized in that, The top plate (11), the first template (12), the second template (13), and the bottom plate (14) are connected in sequence by locking screws (16). The first template (12) is connected to a middle support (15). One end of the middle support (15) is located inside the top plate (11). The push plate (5) is sleeved on the middle support (15) through a guide sleeve (18).

10. The multi-cavity hot runner system according to claim 8, characterized in that, The multi-cavity hot runner system also includes guide posts (17), which are fixed around the base plate (14).

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