Multi-head type hot runner nozzle

Abstract

The utility model relates to the technical field of hot runner injection molding, and discloses a multi-head type hot runner nozzle, which is characterized in that a fixed template, a hot runner fixing plate, a top plate and a runner plate form a mounting die holder, and two feeding structures are arranged in the mounting die holder in a bilateral symmetry manner; an opening and closing air cylinder and a hot nozzle are arranged above and below the middle of the mounting mold base correspondingly, three sets of main valve elements distributed linearly are arranged in the hot nozzle, and the upper ends of the main valve elements are connected with the opening and closing air cylinder through a connecting plate. Two kinds of plastics or two different colors can be used for injection molding at the same time, injection molding can also be carried out independently according to needs, multiple injection molding can be carried out at the same time through diversity and the three arranged nozzle heads, and the injection molding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot runner injection molding technical field especially relates to a multi -head hot runner nozzle. BACKGROUND

[0002] Hot runner is a heating assembly system used in injection mold, which injects melted plastic particles into the cavity of the mold. Hot runner mold is a new structure that heats the runner and flow channel of traditional mold or three-plate mold, so that the runner and flow channel do not need to be removed during each molding.

[0003] The common hot runner nozzle structure is complex, single function, and cannot meet the actual use demand, and generally has certain arrangement order and larger spacing. If the nozzle needs to adopt needle valve structure, it is difficult to ensure the positioning accuracy. The currently used hot runner has only one feeding injection head. If two kinds of plastics need to be injected at the same time, only two sets of molds can be used to realize it. Therefore, we design a multi-head hot runner nozzle. UTILITY MODEL CONTENTS

[0004] In order to solve the technical problem that two sets of molds are needed for simultaneous injection of two kinds of plastics, the utility model provides a multi-head hot runner nozzle.

[0005] The utility model adopts the following technical scheme: a multi-head hot runner nozzle, comprising a fixed template, a hot runner fixed plate is installed above the fixed template, a ceiling is installed above the hot runner fixed plate, an installation cavity is opened in the hot runner fixed plate, a flow channel plate is installed in the installation cavity, the fixed template, the hot runner fixed plate, the ceiling and the flow channel plate constitute an installation mold base;

[0006] Two feeding structures are symmetrically arranged in the installation mold base, and opening and closing cylinders and hot nozzles are arranged above and below the middle of the installation mold base, three groups of main valve cores are arranged in the hot nozzles in a linear distribution, and the upper end of the main valve core is connected with the opening and closing cylinder through a connecting plate.

[0007] As a further improvement of the above scheme, the hot nozzle comprises a nozzle body installed on the hot runner fixed plate and the fixed template, three groups of flow ports are arranged in the nozzle body in a linear distribution, a nozzle head is installed at the bottom end of the flow port, a main valve core is slidably arranged in each flow port, the lower end of the main valve core is sealed and slidably designed with the nozzle head, the main valve core can move up and down under the action of the opening and closing cylinder, and the main valve core can make the material in the interior flow out or not according to the need.

[0008] As a further improvement of the above scheme, the lower end of the nozzle body is provided with a nozzle head straight stop, and the main valve core is slidably arranged in the nozzle head straight stop and can be used to guide the main valve core to ensure the concentricity of the main valve core.

[0009] The nozzle body is provided with a heater one outside, which is an electric heating device capable of heating the material inside the nozzle body to an appropriate temperature, so that it does not cool down, and improves the flow injection molding effect.

[0010] The nozzle body is connected with the hot runner fixing plate through the nozzle mounting positioning pin below, and the nozzle body is connected with the flow guide block and the runner plate through the nozzle transition positioning pin, which is used to ensure the installation precision of the nozzle head, and the main valve core is guided, positioned and sealed by the flow guide block as the main valve core, which also ensures the positioning precision of the nozzle body and the flow guide block.

[0011] As a further improvement of the above scheme, the installation cavity is internally provided with a flow guide block, the upper and lower ends of the flow guide block are respectively abutted with the runner plate and the nozzle body, a flow channel is opened on the flow guide block, three evenly distributed sub-flow channels are opened in the flow channel, the three sub-flow channels are respectively aligned and abutted with the three flow ports, the main valve core penetrates the runner plate upward through the flow channel and is connected with the opening and closing cylinder, the runner plate is provided with three groups of circular holes corresponding to the flow channel, the three main valve cores are connected with the opening and closing cylinder above through the circular holes, and the main valve core is sealingly and slidably designed with the inner wall of the circular hole;

[0012] The flow guide block is provided with a heater two outside, which is used to heat the flow guide block, and the heater two is an electric heating device to avoid the cooling of the material inside.

[0013] As a further improvement of the above scheme, the feeding structure comprises two main nozzles symmetrically arranged on the ceiling, the main nozzles are externally sleeved with heating pieces, the upper end of the main nozzle is provided with a positioning ring, two groups of feeding cylinders are symmetrically arranged below the fixed template, a main valve needle is arranged on the push rod of each group of feeding cylinders, the main valve needle penetrates the runner plate and extends above the inner wall of the main nozzle, and the main valve needle is sealingly designed with the top end of the runner plate and the main nozzle, and a heating couple for heating the material inside the hot runner is further arranged in the runner plate, so that the material inside the main nozzle can enter the hot runner and then enter the hot nozzle, and the cooperatively arranged heating couple can prevent the material from solidifying and facilitate the flow of the material.

[0014] As a further improvement of the above scheme, a heating couple for heating the material inside the runner plate is further arranged in the runner plate;

[0015] Two groups of the feed gas cylinder are controlled by two groups of independent power supply, two injection heads can be used two kinds of plastics or two different colors to injection molding, also can be opened separately one by one, two main valve needles can be controlled to open and close, also can be opened one by one in any order.

[0016] As a further improvement of the above scheme, the left and right ends of the flow channel plate are symmetrically provided with two groups of hot runners, the upper ends of the two groups of hot runners are respectively abutted and aligned with the flow channels of the two main nozzles, and the lower ends of the two hot runners are respectively aligned with and abutted and sealed with the flow channel openings of the flow guide blocks, the two hot runners can be used to injection mold two kinds of plastics or two different colors at the same time, and can also be injection molded according to the specified order.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1、 The utility model discloses a set of feed structure, cooperate with the two hot runners arranged in the flow channel plate, can simultaneously use two kinds of plastics or two different colors to injection molding, also can according to the need of individual injection molding, through the diversity, and set up three nozzle heads, can carry out multiple injection molding simultaneously, improve the injection molding efficiency;

[0019] 2、 The nozzle body is provided with a nozzle straight block at the lower end, and the nozzle body is connected with the flow guide block through the nozzle transition positioning pin at the upper end, the valve core is guided, positioned and sealed by the secondary part, the positioning accuracy of the main valve core is improved, and the use requirement is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model provides a whole structure schematic diagram of multi -head type hot runner nozzle;

[0021] Figure 2 It is Figure 1 The top view;

[0022] Figure 3 It is Figure 2 The section view of A-A in

[0023] Figure 4 It is Figure 2 The section view of B-B in

[0024] Figure 5 It is Figure 4 The structure schematic diagram of hot nozzle in

[0025] Figure 6 It is Figure 5 The side schematic diagram of

[0026] Figure 7 It is Figure 4 The top view of flow guide block in

[0027] Main symbol explanation:

[0028] 1, fixed template; 2, hot runner fixed plate; 21, installation cavity; 22, runner plate; 23, hot runner; 24, thermocouple; 3, ceiling; 4, feed structure; 41, positioning ring; 42, main nozzle; 43, main valve needle; 44, feed cylinder; 5, opening and closing cylinder; 6, hot nozzle; 61, nozzle body; 62, heater one; 63, nozzle head; 64, nozzle head straight block; 65, nozzle mounting positioning pin; 66, nozzle transition positioning pin; 7, flow guide block; 71, heater two; 72, runner port; 73, sub-runner; 8, main valve core. DETAILED DESCRIPTION

[0029] Next, the utility model will be described further in conjunction with the drawings and specific embodiments, it should be explained that, without conflict, the following described embodiments or between the technical features between can be arbitrarily combined to form new embodiments.

[0030] Embodiments:

[0031] Please combine Figures 1-7 The multi-head hot runner nozzle of the embodiment comprises a fixed template 1, a hot runner fixed plate 2 is installed above the fixed template 1, a ceiling 3 is installed above the hot runner fixed plate 2, and an installation cavity 21 is formed in the hot runner fixed plate 2, a runner plate 22 is installed in the installation cavity 21, and the fixed template 1, the hot runner fixed plate 2, the ceiling 3 and the runner plate 22 constitute an installation mold base.

[0032] Two feed structures 4 are symmetrically arranged in the installation mold base, and an opening and closing cylinder 5 and a hot nozzle 6 are arranged above and below the middle of the installation mold base respectively, three groups of main valve cores 8 are arranged in the hot nozzle 6 in linear distribution, and the upper end of the main valve core 8 is connected with the opening and closing cylinder 5 through a connecting plate 51.

[0033] The hot nozzle 6 comprises a nozzle body 61 installed on the hot runner fixed plate 2 and the fixed template 1, three groups of flow ports are arranged in the nozzle body 61 in linear distribution, a nozzle head 63 is installed at the bottom end of each flow port, the main valve core 8 is slidably arranged in each flow port, the lower end of the main valve core 8 is sealingly and slidably designed with the nozzle head 63, the main valve core 8 can move up and down under the action of the opening and closing cylinder 5, and the main valve core 8 can make the internal material flow out or not according to the need.

[0034] A nozzle head straight block 64 is arranged at the lower end of the nozzle body 61, the main valve core 8 is slidably arranged in the nozzle head straight block 64, which can guide the main valve core 8 and ensure the concentricity of the main valve core 8.

[0035] The nozzle body 61 is externally provided with a heater 62, which is an electric heating device capable of heating the material inside the nozzle body 61 to a suitable temperature, so that the material will not cool down, thereby improving the flow injection molding effect.

[0036] The nozzle body is connected with the hot runner fixing plate 2 through the nozzle mounting positioning pin 65 below the nozzle body, and the nozzle body 61 is connected with the flow guide block 7 and the runner plate 22 through the nozzle transition positioning pin 66, which is used to ensure the installation precision of the nozzle head 61, and the main valve core 8 is guided, positioned and sealed by the flow guide block 7 as the guide of the main valve core 8, thereby ensuring the positioning precision of the nozzle body 61 and the flow guide block 7.

[0037] The flow guide block 7 is installed in the installation cavity 21, and the upper and lower ends of the flow guide block 7 are respectively abutted with the runner plate 22 and the nozzle body 61. The flow guide block 7 is provided with a flow channel 72, and three evenly distributed sub-flow channels 73 are arranged in the flow channel 72. The three sub-flow channels 73 are respectively aligned and abutted with the three flow ports. The main valve core 8 penetrates the runner plate 22 upward through the flow channel 72 and is connected with the opening and closing cylinder 5. The runner plate 22 is provided with three groups of circular holes corresponding to the flow channel 72. The three main valve cores 8 are connected with the opening and closing cylinder 5 above through the circular holes, and the main valve core 8 is sealingly and slidably designed with the inner wall of the circular hole.

[0038] The flow guide block 7 is externally provided with a heater 71 for heating the flow guide block 7. The heater 71 is an electric heating device to avoid the material inside from cooling down.

[0039] The runner plate 22 is internally and symmetrically provided with two groups of hot runners 23 at the left and right ends. The upper ends of the two groups of hot runners 23 are respectively abutted and aligned with the flow channels of the two main nozzles 42, and the lower ends of the two hot runners 23 are respectively aligned and abutted with the flow channel 72 of the flow guide block 7. The two hot runners 23 can be used to injection mold two kinds of plastics or two different colors at the same time, and can also be injection molded according to the specified order respectively as needed.

[0040] The feeding structure 4 includes two main nozzles 42 symmetrically arranged on the ceiling 3. The main nozzles 42 are externally sleeved with heating pieces, and the upper ends of the main nozzles 42 are provided with positioning rings 41. Two groups of feeding cylinders 44 are symmetrically arranged below the fixed mold plate 1. The push rods of the two groups of feeding cylinders 44 are respectively provided with main valve needles 43. The main valve needles 43 penetrate the runner plate 22 and extend into the inner wall of the main nozzle 42 above, and the main valve needle 43 is sealingly designed with the top end of the runner plate 22 and the main nozzle 42, so that the material inside the main nozzle 42 can enter the hot runner 23, and then enter the hot nozzle 6.

[0041] The runner plate 22 is further provided with a heating couple 24 for heating the material inside the hot runner 23. The cooperatively arranged heating couple 24 makes the material not solidify, thereby facilitating the flow of the material.

[0042] Two groups of the feed cylinder 44 are controlled by two groups of independent power supply, two injection heads can be used to inject two kinds of plastics or two different colors at the same time, or can be opened one by one, and two main valve needles 43 can be controlled to open and close.

[0043] The implementation principle of the multi-head hot runner nozzle in the embodiment of the application is as follows: when performing injection molding, the corresponding main valve needle 43 is moved downward by the corresponding feed cylinder 44 according to the need, at this time, the fluid material enters the corresponding hot runner 23 through the corresponding main nozzle 42, and if two kinds of materials enter at the same time, they can be mixed according to the flow rate, or the opening sequence of the main valve needle 43 in the two groups of feed structures 4 can be used to feed and flow, and then enter the nozzle body 61 of the hot nozzle 6 through the flow channel port 72 on the flow guide block 7, and flow out through the nozzle head 63 to perform injection molding, and two main nozzles 42 can be used to inject two kinds of plastics or two different colors at the same time, or one can be opened first and the other can be opened later.

[0044] By setting two groups of independently controlled feed structures 4, each feed structure is controlled by a single feed cylinder, and two hot runners 23 are arranged in the flow channel plate 22, which can be used to inject two kinds of plastics or two different colors at the same time, or can be used to perform injection molding individually according to the need, has diversity, and three nozzle heads 63 are arranged, which can be used to perform multiple injection molding at the same time, improving the injection molding efficiency.

[0045] The nozzle straight block 66 is arranged at the lower end of the nozzle body 61, and the nozzle transition positioning pin 66 is connected with the flow guide block 7 above the nozzle body 61, the valve core 8 is guided, positioned and sealed by the secondary part, improving the positioning accuracy of the main valve core 8 and ensuring the use requirement.

[0046] The above embodiment is only a preferred embodiment of the application, and cannot be used to limit the scope of protection of the application, and any non-substantial change and replacement made by a person skilled in the art on the basis of the application belongs to the scope of protection of the application.

Claims

1. A multi-lateral hot- flow nozzle characterized by, The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22).

2. A multi-lane hot runner nozzle as described in claim 1, wherein, The hot nozzle (6) comprises a nozzle body (61) installed on the hot runner fixed plate (2) and the fixed mold plate (1), three groups of linearly distributed flow ports are arranged in the nozzle body (61), a nozzle head (63) is installed at the bottom end of each flow port, and a main valve core (8) is slidably arranged in each flow port.

3. A multi-lane hot- flow nozzle as claimed in claim 2, wherein, The nozzle head (63) is sealed and slidably designed with the main valve core (8) at the lower end.

4. A multi-lane hot- flow nozzle as claimed in claim 2, wherein, The nozzle body (61) is connected with the hot runner fixed plate (2) through a nozzle installation positioning pin (65) below the nozzle body (61), and the nozzle body (61) is connected with the flow guide block (7) and the runner plate (22) through a nozzle transition positioning pin (66).

5. A multi-lane hot- flow nozzle as claimed in claim 2, wherein, The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22).

6. A multi-lane hot- flow nozzle as claimed in claim 2, wherein, The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22).

7. A multi-lane hot- flow nozzle as claimed in claim 6, wherein The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). 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The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is composed of the fixed mold plate (1), the hot runner fixed plate (2), the ceiling (3) and the runner plate (22). The installation mold base is 8. A multi-lane hot- flow nozzle as claimed in claim 2, wherein, The flow channel plate (22) is internally provided with two groups of hot flow channels (23) symmetrically arranged at left and right ends, the upper ends of the two groups of hot flow channels (23) are respectively abutted and aligned with the flow channels of two main nozzles (42), and the lower ends of the two hot flow channels (23) are respectively aligned and abutted and sealed with the flow channel ports (72) of the flow guide blocks (7).

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