Sectional control hot runner structure, injection molding device, processing technology and application

Abstract

The invention discloses a sectional control hot runner structure, an injection molding device, a machining process and application. The hot runner structure is characterized by comprising a runner main body, a nozzle assembly and a delay start controller, the nozzle main body is mounted at the feeding station, and the input end of the nozzle main body is communicated with one output end of the material channel; the valve needle is installed on the nozzle body in a reset moving mode and moves to be separated from or abut against the output end of the nozzle body. The moving driver is installed on the feeding station and used for driving the valve needle to reset and move. The delay starting controller is in communication connection with the moving drivers, the first-stage temperature control devices and the second-stage temperature control devices and used for controlling the moving drivers of the two adjacent feeding stations to be started in a delayed mode in sequence and controlling the temperature of the first-stage temperature control devices and the temperature of the second-stage temperature control devices in the corresponding feeding stations before the moving drivers are started. According to the scheme, the problem that the combination degree becomes poor due to parameter differences during material injection molding during multi-station injection molding of large injection molding parts is solved.

Description

Technical Field

[0001] The invention relates to the field of injection molding devices, and in particular to a hot runner structure controlled in a segmented manner, an injection molding device, a processing technology and a use thereof. Background Art

[0002] In the traditional injection molding process, large injection molded parts are mainly injected simultaneously by nozzles acting on different areas. However, since the material needs to pass through different areas from input to output to reach different nozzles, and then be output through different nozzles, the differences in the material transmission distance, transmission temperature and pressure during the transmission will cause the material to have different physical parameters when it is output from different nozzles. In particular, the nozzle farthest from the input end has the greatest difference in material output from the farthest and nearest nozzles. Therefore, for large injection molded parts, it will lead to poor bonding between two adjacent injection molding areas, and then there will be bonding lines between different molding areas, affecting the quality and aesthetics of large injection molded parts. Summary of the invention

[0003] The purpose of the present invention is to propose a hot runner structure with segmented control, which can divide the runner body into multiple feeding stations, each feeding station corresponds to a nozzle assembly. This scheme uses a delayed start controller to control the movement of the valve needle in the nozzle body, and can also control the temperature of the primary temperature control device and the secondary temperature control device as needed, which can ensure that the material enters the mold at the optimal temperature during delayed injection.

[0004] The present invention also provides an injection molding device, which uses the above-mentioned segmented controlled hot runner structure.

[0005] The present invention also provides an injection molding process, which performs injection molding based on the hot runner structure.

[0006] The invention also proposes a use of the hot runner structure in injection molding.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A hot runner structure with segmented control, comprising: a runner body, a nozzle assembly and a delayed start controller;

[0009] The flow channel body is installed on the flow channel body; the flow channel body is provided with a plurality of continuously distributed feeding stations, and the nozzle assemblies are respectively installed on the plurality of feeding stations; the flow channel body is provided with a material channel flowing through the plurality of feeding stations;

[0010] The nozzle assembly comprises: a nozzle body, a valve needle, a movable driver, a flow channel temperature control device, a primary temperature control device, a secondary temperature control device, a first temperature control shell and a second temperature control shell;

[0011] The nozzle body is installed at the feeding station, and the input end of the nozzle body is connected to one of the output ends of the material channel; the valve needle is installed at the nozzle body to be resettable and movable, and the valve needle moves to be separated from or against the output end of the nozzle body; the mobile driver is installed at the feeding station, and the output end of the mobile driver is connected to the valve needle, so as to drive the valve needle to reset and move;

[0012] The flow channel body is provided with a first heating groove on the outer contour of each of the feeding stations, and the flow channel temperature control device is installed in the first heating groove; the first temperature control shell and the second temperature control shell are respectively sleeved on the outer side of the nozzle body, and the second temperature control shell is close to the output end of the nozzle body; the heating end of the first temperature control device is located in the first temperature control shell; the heating end of the second temperature control device is located in the second temperature control shell;

[0013] The delayed start controller is communicatively connected to the mobile drive, the primary temperature control device and the secondary temperature control device respectively, and is used to control the delayed start of the mobile drives of two adjacent feeding stations in sequence, and to control the temperature of the primary temperature control device and the secondary temperature control device in the corresponding feeding station before the mobile drive is started.

[0014] Preferably, the heating end of the secondary temperature control device sequentially passes through the first temperature control shell and the second temperature control shell, and the heating end of the secondary temperature control device in a section of the first temperature control shell serves as the primary temperature control device;

[0015] The first temperature control shell is provided with an airtight groove for accommodating a heat-conducting medium between the primary temperature control device and the outer side surface of the nozzle body, so that the temperature of the nozzle body at the first temperature control shell is lower than the temperature at the second temperature control shell.

[0016] Optimally, the heating end of the secondary temperature control device includes: a first heating section, a connecting section and a second heating section;

[0017] The first heating section is connected to the second heating section through the connecting section; the first heating section can be relatively movably arranged in the first temperature-controlled shell, the second heating section can be relatively movably arranged in the second temperature-controlled shell, and the connecting section extends along the length direction of the nozzle body;

[0018] The first temperature control shell is movably and adjustably sleeved on the outer side of the nozzle body and moves along the length direction of the connecting section.

[0019] Preferably, the outer surface of the first temperature control shell is provided with a vent hole connected to the air-isolating groove; the heat-conducting medium is air; and the heating end of the secondary temperature control device is provided with a resistor.

[0020] Preferably, the moving drive is a cylinder.

[0021] Optimally, it also includes: a rack and a position adjustment drive;

[0022] The flow channel body is installed on the frame; the output end of the position adjustment driver is connected to the flow channel body, and is used to drive the flow channel body to move, thereby driving the frame to move;

[0023] The control end of the nozzle assembly and the delayed start controller are respectively mounted on the frame.

[0024] It can be optimized to further include: a U-shaped metal arm;

[0025] The frame is provided with a frame opening; a U-shaped opening is provided on one side of the U-shaped metal arm, and the U-shaped metal arm is fixed to the inner wall of the frame opening on the opposite side of the U-shaped opening, and the U-shaped metal arm is connected to one of the feeding stations through the U-shaped opening, so that the flow channel body is limited to the frame opening through multiple U-shaped metal arms; a buffer gap is formed between the inner wall of the frame opening and the flow channel body.

[0026] An injection molding device is provided with the above-mentioned segmented controlled hot runner structure.

[0027] An injection molding process, using the above-mentioned segmented controlled hot runner structure, comprises the following steps:

[0028] (1) Input the size parameters of the injection molded parts into the system in advance and divide them into different molding areas according to the injection molding sequence. Each molding area corresponds to a feeding station of the runner body.

[0029] (2) starting and controlling the flow channel temperature control device, the primary temperature control device and the secondary temperature control device in each feeding station according to the size parameters of the injection molded part to preheat the flow channel body;

[0030] (3) Injection molding material is introduced into the input end of the material channel, and the injection molding material is transported to the inside of the nozzle body through the feeding station; the delay start controller controls the heating temperature of the primary temperature control device and / or the secondary temperature control device to the storage temperature;

[0031] (4) Injecting the nozzle body of one of the feeding stations into the front molding area in the injection molding sequence; before the nozzle body is about to complete the injection molding, the delayed start controller first controls the heating temperature of the secondary temperature control device in the next adjacent feeding station to rise to the output temperature, and the nozzle body of the next adjacent feeding station continues to inject into the corresponding molding area; repeat this step until the nozzle bodies of multiple feeding stations continuously complete the injection molding of multiple molding areas in the injection molding sequence.

[0032] A hot runner structure is used in injection molding, wherein the hot runner structure is a segmented controlled hot runner structure as described above.

[0033] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0034] This solution provides a segmented controlled hot runner structure, which can divide the runner body into multiple feeding stations, each feeding station corresponds to a nozzle assembly. This solution uses a delayed start controller to control the movement of the valve needle in the nozzle body, and can also control the temperature of the primary temperature control device and the secondary temperature control device as needed, which can ensure that the material enters the mold at the optimal temperature during delayed injection, and solves the problem of poor bonding due to differences in material injection parameters during multi-station injection molding of large injection molded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of one embodiment of the hot runner structure;

[0036] Figure 2 yes Figure 1 A magnified schematic diagram of the middle part;

[0037] Figure 3 It is a structural schematic diagram of one embodiment of the hot runner structure;

[0038] Figure 4 It is a schematic diagram of the distribution structure of the feeding station in the flow channel body;

[0039] Figure 5 is a schematic cross-sectional structure diagram of one embodiment of a nozzle body;

[0040] Figure 6 yes Figure 5 Enlarged schematic diagram of part B in the middle.

[0041] in:

[0042] Flow channel body 1, nozzle assembly 2, delayed start controller 3; frame 4, position adjustment driver 5; U-shaped metal arm 6;

[0043] Feeding station 10; first heating tank 11;

[0044] Control end 20; nozzle body 21, valve needle 22, mobile driver 23, flow channel temperature control device 24, primary temperature control device 25, secondary temperature control device 26, first temperature control shell 27, second temperature control shell 28;

[0045] Spacing groove 271; vent hole 272;

[0046] A first heating section 261, a connecting section 262, and a second heating section 263;

[0047] Frame opening 41 ; U-shaped opening 61 ; buffer gap 62 . DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, which are used to distinguish and describe the features, without distinction of order or importance. In the description of the present invention, unless otherwise specified, "multiple" means more than two.

[0050] like Figure 1-6 , a segmented controlled hot runner structure, comprising: a runner body 1, a nozzle assembly 2 and a delayed start controller 3;

[0051] The flow channel body 1 is installed on the flow channel body 1; the flow channel body 1 is provided with a plurality of continuously distributed feeding stations 10, and the nozzle assembly 2 is respectively installed on the plurality of the feeding stations 10; the flow channel body 1 is provided with a material channel 12 flowing through the plurality of the feeding stations 10;

[0052] The nozzle assembly 2 includes: a nozzle body 21, a valve needle 22, a moving driver 23, a flow channel temperature control device 24, a primary temperature control device 25, a secondary temperature control device 26, a first temperature control shell 27 and a second temperature control shell 28;

[0053] The nozzle body 21 is installed at the feeding station 10, and the input end of the nozzle body 21 is connected to one of the output ends of the material channel 12; the valve needle 22 is installed at the nozzle body 21 to be resettable and movable, and the valve needle 22 moves to be separated from or against the output end of the nozzle body 21; the mobile driver 23 is installed at the feeding station 10, and the output end of the mobile driver 23 is connected to the valve needle 22, so as to drive the valve needle 22 to reset and move;

[0054] The flow channel body 1 is provided with a first heating groove 11 at the outer contour of each of the feeding stations 10, and the flow channel temperature control device 24 is installed in the first heating groove 11; the first temperature control shell 27 and the second temperature control shell 28 are respectively sleeved on the outer side of the nozzle body 21, and the second temperature control shell 28 is close to the output end of the nozzle body 21; the heating end of the primary temperature control device 25 is located in the first temperature control shell 27; the heating end of the secondary temperature control device 26 is located in the second temperature control shell 28;

[0055] The delayed start controller 3 is communicatively connected to the mobile driver 23, the primary temperature control device 25 and the secondary temperature control device 26 respectively, and is used to control the delayed start of the mobile drivers 23 of two adjacent feeding stations 10 in sequence, and control the temperature of the primary temperature control device 25 and the secondary temperature control device 26 in the corresponding feeding station 10 before the mobile driver 23 starts.

[0056] The present invention provides a hot runner structure with segmented control, which can divide the runner body 1 into multiple feeding stations 10, each feeding station 10 corresponds to a nozzle assembly 2. The present invention uses a delayed start controller 3 to control the movement of the valve needle 22 in the nozzle body 21, and can also control the temperature of the primary temperature control device 25 and the secondary temperature control device 26 as needed, which can ensure that the material enters the mold at the optimal temperature during delayed injection, and solves the problem of poor bonding due to differences in material injection parameters during multi-station injection molding of large injection molded parts.

[0057] Specifically, the runner body 1 is provided with a plurality of feeding stations 10, each feeding station 10 corresponds to a different area of ​​the large injection molded part; in the traditional injection molding process, if different areas of the large injection molded part are directly and simultaneously injected, after the material is input from the input end of the runner body 1, it needs to pass through the input end of the nozzle body 21 in different areas before it can be output through the output end of the nozzle body 21. The differences in the transmission distance, transmission temperature and pressure during the period will cause the material to have different physical parameters when it is output from different nozzle bodies 21; especially the feeding station 10 farthest from the input end has the largest difference in physical parameters, resulting in poor bonding between two adjacent injection molding areas, and then there is a bonding line between different molding areas, affecting the quality and aesthetics of the large injection molded part; in this regard, the present scheme is provided with a plurality of feeding stations 10 in the runner body 1; the material channel 12 in the runner body 1 flows through a plurality of feeding stations 10, The nozzle bodies 21 of the feeding stations 10 output materials respectively; the flow channel body 1 is respectively provided with a first heating groove 11 at each feeding station 10, and the first heating groove 11 of each feeding station 10 is respectively installed with a flow channel temperature control device 24 for independently controlling the temperature of the feeding station 10, so that the material can maintain the optimal material transfer temperature when it flows through the feeding stations 10 in sequence; for example, when the temperature of the material is too high and causes the temperature of a certain feeding station 10 to be too high, the material causes the temperature of the feeding station 10 to rise, and thus the flow channel temperature control device 24 of the feeding station 10 can stop heating, so that the temperature of the feeding station 10 is maintained within a preset temperature range; similarly, the temperature of the material is too low and absorbs the heat of the feeding station 10, and the material causes the temperature of the feeding station 10 to drop, and thus the flow channel temperature control device 24 of the feeding station 10 can start the heating function, so that the temperature of the feeding station 10 is maintained within a preset temperature range. In this way, the material is at a preset temperature from the input end of the flow channel body 1 to the feeding station 10, and the preset temperature is set based on production experience, heat loss and other factors. The preset temperature will not affect subsequent molding.When the material is transferred to the feeding station 10, the material continues to be transferred to the inside of the nozzle body 21, and the reset movement of the valve needle 22 in the nozzle body 21 can control the output or closing of the material; when the valve needle 22 moves to the output end of the nozzle body 21, the material cannot be output from the nozzle body 21 to the outside; when the valve needle 22 moves to the output end that is separated from the nozzle body 21, the material can be output from the nozzle body 21 to the outside; the valve needle 22 of each nozzle body 21 is driven to move by an independent mobile driver 23; and this scheme uses a delayed start controller 3 to control the delayed start between the mobile drivers 23 of two adjacent feeding stations 10, for example, the 1# valve needle corresponding to the 1# mobile driver 23 When 22 completes or is about to complete the blocking of the output end of the 1# nozzle body 21, the delayed start controller 3 starts the 2# mobile driver 23 corresponding to the 2# nozzle body 21 of the adjacent feeding station 10 of the 1# nozzle body 21, and the 2# mobile driver 23 drives the 2# valve needle 22 to open the output end of the 2# nozzle body 21, and this is executed in sequence until the n# nozzle body 21 of the last feeding station 10 completes the injection molding; in this regard, since the n-1# nozzle body 21 and the n# nozzle body 21 are in adjacent positions, when the n-1# nozzle body 21 completes or is about to complete the injection molding of a certain area, the delayed start controller 3 immediately starts the n# nozzle body 21 adjacent to it to continue to inject the adjacent area, and the objects in the two areas are blocked. The difference in physical parameters of the materials is minimal; in particular, the present solution further provides a first temperature control shell 27 and a second temperature control shell 28 on the outside of the nozzle body 21, and controls the temperature of the nozzle body 21 before and after injection molding through a primary temperature control device 25 and a secondary temperature control device 26; specifically, the heating end of the primary temperature control device 25 is used to heat the first temperature control shell 27, and the heating end of the secondary temperature control device 26 is used to heat the second temperature control shell 28; the second temperature control shell 28 is close to the output end of the nozzle body 21, that is, it is mainly used to keep the material of the output part warm; relatively, the first temperature control shell 27 can mainly keep the material between the input end and the second temperature control shell 28 warm; and because different feeding stations 10 use delayed discharge, If the output temperature is still used to keep the material warm during the delayed waiting period, the material may be in a high temperature and high pressure state, which may affect the chemical stability (for example, local temperature is too high and causes coking); in this regard, the present solution uses the first temperature control shell 27 and the second temperature control shell 28 to respectively control the storage area and the output area of ​​the nozzle body 21 by segmented temperature. During the delayed waiting period, the temperature of the second temperature control shell 28 is controlled at a storage temperature lower than the output temperature, and the temperature of the first temperature control shell 27 is controlled at a temperature lower than or equal to the storage temperature; when the nozzle is discharging, the secondary temperature control device 26 can be controlled to start the heating function, so that the temperature of the second temperature control shell 28 rises to the output temperature, so that the material can be output in the best state for injection molding. In this way, the segmented temperature control feature of the nozzle body 21 of the present solution can avoid the situation where the chemical stability of the material is affected by excessive heating during delayed injection.That is, this solution can solve the problem of poor bonding of large injection molded parts due to differences in material injection molding parameters during multi-station injection molding.

[0058] Optimally, the heating end of the secondary temperature control device 26 sequentially passes through the first temperature control shell 27 and the second temperature control shell 28, and the heating end of the secondary temperature control device 26 in a section of the first temperature control shell 27 serves as the primary temperature control device 25;

[0059] The first temperature control shell 27 is provided with an isolation groove 271 for accommodating a heat-conducting medium between the primary temperature control device 25 and the outer side surface of the nozzle body 21 , so that the temperature of the nozzle body 21 at the first temperature control shell 27 is lower than the temperature at the second temperature control shell 28 .

[0060] The primary temperature control device 25 and the secondary temperature control device 26 of the present scheme can use non-independent heating devices respectively; and in the optimal embodiment, the present scheme can directly use part of the heating end of the secondary temperature control device 26 as the primary temperature control device 25, that is, a single nozzle body 21 only needs to use a single heating device to achieve graded temperature control of the nozzle body 21; specifically, the first temperature control shell 27 is provided with a partition groove 271 between the primary temperature control device 25 and the outer side surface of the nozzle body 21; the partition groove 271 has a storage function and can be used to arrange a heat-conducting medium, thereby separating the primary temperature control device 25 from the outer side surface of the nozzle body 21 through the heat-conducting medium, and the heating of the first temperature control shell 27 by the primary temperature control device 25 will not directly act on the outer side surface of the nozzle body 21, but through the partition groove 271 The heat-conducting medium conducts heat to the outer side of the nozzle body 21; and because the heat-conducting medium and the first temperature-control shell 27 are made of different materials, the first temperature-control shell 27 is made of metal, and the heat-conducting medium is made of materials other than metal, such as air, plastic plate, water, oil, etc.; therefore, a single secondary temperature control device 26 is also used as a heating source, and the temperature of the nozzle body 21 in the first temperature-control shell 27 is lower than the temperature in the second temperature-control shell 28, so the temperature of the output area of ​​the nozzle body 21 is higher than the storage area at any time; in this way, during the delay waiting period of the nozzle body 21, the heating temperature of the second temperature-control shell 28 can be controlled at the storage temperature, so that the material in the output area is at the storage temperature; at the same time, since the storage area of ​​the nozzle body 21 is actually lower than the storage temperature, it will not affect the storage of the material. Before the nozzle body 21 needs to be output, the temperature of the second temperature-control shell 28 is raised to the output temperature. At this time, the output area of ​​the nozzle body 21 is at the output temperature, which is convenient for material output; after heating, the storage area of ​​the nozzle body 21 rises to the storage temperature. In this way, the present solution can use the secondary temperature control device 26 as a single heating source to perform graded temperature control, thereby preventing too many heating elements from being exposed on the surface of the nozzle body 21 and affecting the injection molding in terms of spatial position, and avoiding the problem of too many heating elements interfering with each other.

[0061] The flow channel temperature control device 24, the primary temperature control device 25, and the secondary temperature control device 26 are well-known mechanisms with heating functions, and the heating method and principle can be selected according to needs as long as the heating function is achieved.

[0062] Optimally, the heating end of the secondary temperature control device 26 includes: a first heating section 261, a connecting section 262 and a second heating section 263;

[0063] The first heating section 261 and the second heating section 263 are connected via the connecting section 262; the first heating section 261 is relatively movably disposed in the first temperature-control housing 27, the second heating section 263 is relatively movably disposed in the second temperature-control housing 28, and the connecting section 262 extends along the length direction of the nozzle body 21;

[0064] The first temperature control shell 27 is movably and adjustably sleeved on the outer side of the nozzle body 21 and moves along the length direction of the connecting section 262 .

[0065] Based on the fact that the heating end of the secondary temperature control device 26 can simultaneously control the temperature of different areas of the nozzle body 21 in different levels, the heating position of the nozzle body 21 by the first temperature control shell 27 can be adjusted as needed, so as to calibrate the storage temperature of the storage area; specifically, the heating end of the secondary temperature control device 26 is a continuous structure, which sequentially includes a first heating section 261, a connecting section 262 and a second heating section 263; the first heating section 261 is mainly used to heat the first temperature control shell 27, and the second heating section 263 is mainly used to heat the second temperature control shell 28; the first temperature control shell 27 moves toward or away from the second temperature control shell 28, which can adjust the temperature of the nozzle body 21; the second temperature control shell 27 ... The distance between the first temperature-controlled shell 27 and the second temperature-controlled shell 28 is adjusted, and the distance between the first temperature-controlled shell 27 and the input end of the nozzle body 21 is adjusted; the first temperature-controlled shell 27 moves toward the second temperature-controlled shell 28, the distance between the first temperature-controlled shell 27 and the second temperature-controlled shell 28 is reduced, and the distance between the first temperature-controlled shell 27 and the input end of the nozzle body 21 is increased; and the above-mentioned distance is not a direct heating area, and is mainly in contact with air or molds, so the temperature of the distance is slightly lower than the storage temperature, and the size of the distance can adjust the storage temperature distribution without lowering the temperature of the second temperature-controlled shell 28 during the delay period.

[0066] At the same time, the first temperature-controlled shell 27 moves along the length direction of the connecting section 262, the first heating section 261 moves relatively to the first temperature-controlled shell 27, and the second heating section 263 moves relatively to the second temperature-controlled shell 28, so as to make adaptive movement adjustment.

[0067] Optimally, the outer surface of the first temperature control shell 27 is provided with a vent hole 272 connected to the air-isolating groove 271; the heat-conducting medium is air; and the heating end of the secondary temperature control device 26 is provided with a resistor.

[0068] like Figure 6 In this solution, the first temperature control shell 27 is provided with a vent hole 272, and the air gap 271 can inhale or discharge air through the vent hole 272, thereby increasing the fluidity of the air in the local air gap 271. When the fluidity of the air is improved, the temperature uniformity in the air gap 271 is improved, and the local temperature of the first temperature control shell 27 will not be too high. In this solution, a resistor is preferably used to heat the first temperature control shell 27. Based on the first temperature control shell 27 being metal, the first temperature control shell 27 can heat the air in the air gap 271, and then heat the nozzle body 21 through the air, thereby realizing the graded temperature control of the nozzle body 21 using a single heating device.

[0069] Optimally, the moving driver 23 is a cylinder.

[0070] The cylinder is provided with an air source and an air-controlled valve device; the air source is connected to the cylinder through the air-controlled valve device; the air-controlled valve device is connected to the delayed start controller 3 in communication; the delayed start controller 3 controls one or more of the air-controlled valve devices to open or close according to the algorithm, thereby controlling the movement of the valve needle 22 through air intake or air outlet. In this scheme, the cylinder is used to control the movement of the valve needle 22. The cylinder has two output states, namely, the extended state and the retracted state, which just meet the requirements of adjusting the valve needle 22 to move away from or against the output end of the nozzle body 21. At the same time, the cylinder has a fast response speed, and the valve needle 22 switches quickly to open or close, which reduces the time difference of switching, so that the material can be output to the designated area faster.

[0071] Optimally, it further comprises: a frame 4 and a position adjustment drive 5;

[0072] The flow channel body 1 is installed on the frame 4; the output end of the position adjustment driver 5 is connected to the flow channel body 1, and is used to drive the flow channel body 1 to move, thereby driving the frame 4 to move;

[0073] The control end 20 of the nozzle assembly 2 and the delayed start controller 3 are respectively installed on the frame 4.

[0074] Generally, the flow channel body 1 is installed on the frame 4, and then the position adjustment driver 5 is used to drive the frame 4 to move, drive the flow channel body 1 to move, and then drive the nozzle assembly 2 to move; in the optimal embodiment, this solution directly drives the flow channel body 1 to move through the position adjustment driver 5, thereby driving the frame 4 to move, and then driving the control end 20 in the nozzle assembly 2 to move. The main reason is that the flow channel body 1 is large in size, and controlling the flow channel body 1 can make the nozzle body 21 reach the target position; if the position adjustment driver 5 is used to directly drive the frame 4, the large flow channel body 1 and its multiple nozzle bodies 21 may change their positions on the frame 4 after long-term use, which will cause a difference between the nozzle body 21 and the target position.

[0075] The control end 20 refers to the control elements involved in the nozzle assembly 2 during the injection molding, such as a valve body, a socket, a nozzle, a switch, a sensor, etc., which mainly plays a control role.

[0076] It can be optimized to further include: a U-shaped metal arm 6;

[0077] The frame 4 is provided with a frame opening 41; a U-shaped opening 61 is provided on one side of the U-shaped metal arm 6, and the U-shaped metal arm 6 is fixed to the inner wall of the frame opening 41 on the opposite side of the U-shaped opening 61, and the U-shaped metal arm 6 is connected to one of the feeding stations 10 through the U-shaped opening 61, so that the flow channel body 1 is limited to the frame opening 41 through multiple U-shaped metal arms 6; a buffer gap 62 is formed between the inner wall of the frame opening 41 and the flow channel body 1.

[0078] The U-shaped metal arm 6 is in a U-shaped structure, with a U-shaped opening 61 on one side and the other opposite side connected to the inner wall of the frame opening 41. The U-shaped opening 61 is connected to the feeding station 10. The U-shaped metal arms 6 at multiple positions are connected to the feeding station 10 through the U-shaped opening 61, so that the flow channel body 1 can be limited to the frame opening 41. The frame opening 41 has a protective effect on the flow channel body 1 to prevent the flow channel body 1 from being deformed by impact; and a buffer gap 62 is formed between the inner wall of the frame opening 41 and the flow channel body 1. Since the U-shaped metal arm 6 is in a U-shape, the U-shaped metal arm 6 on both sides of the U-shaped opening 61 can be buffered and adjusted within a limited range of the buffer gap 62. When the flow channel body 1 is impacted, multiple U-shaped metal arms 6 provide adaptive adjustment to offset part of the impact, thereby improving stability.

[0079] An injection molding device is provided with the above-mentioned segmented controlled hot runner structure.

[0080] An injection molding process, using a segmented controlled hot runner structure of any of the above embodiments, comprises the following steps:

[0081] (1) Input the size parameters of the injection molded part into the system in advance, and divide it into different molding areas according to the injection molding sequence, each molding area corresponds to a feeding station 10 of the runner body 1;

[0082] (2) starting and controlling the flow channel temperature control device 24, the primary temperature control device 25 and the secondary temperature control device 26 in each feeding station 10 according to the size parameters of the injection molded part to preheat the flow channel body 1;

[0083] (3) The injection molding material is introduced into the input end of the material channel 12, and the injection molding material is transported to the inside of the nozzle body 21 through the feeding station 10; the delay start controller 3 controls the heating temperature of the primary temperature control device 25 and / or the secondary temperature control device 26 to the storage temperature;

[0084] (4) Injection molding is performed in the order of injection molding using the nozzle body 21 of one of the feed stations 10 to the previous molding area; before the nozzle body 21 is about to complete the injection molding, the delayed start controller 3 first controls the heating temperature of the secondary temperature control device 26 in the next adjacent feed station 10 to rise to the output temperature, and the nozzle body 21 of the next adjacent feed station 10 continues to inject molding into the corresponding molding area; repeat this step until the nozzle bodies 21 of multiple feed stations 10 continuously complete the injection molding of multiple molding areas in the order of injection molding.

[0085] A use of a hot runner structure in an injection molding process, wherein the hot runner structure is a segmented controlled hot runner structure of any of the above embodiments.

[0086] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hot runner structure with segmented control, characterized in that: include: Flow channel body, nozzle assembly and delayed start controller; The flow channel body is installed on the flow channel body; the flow channel body is provided with a plurality of continuously distributed feeding stations, and the nozzle assemblies are respectively installed on the plurality of feeding stations; the flow channel body is provided with a material channel flowing through the plurality of feeding stations; The nozzle assembly comprises: a nozzle body, a valve needle, a movable driver, a flow channel temperature control device, a primary temperature control device, a secondary temperature control device, a first temperature control shell and a second temperature control shell; The nozzle body is installed at the feeding station, and the input end of the nozzle body is connected to one of the output ends of the material channel; the valve needle is installed at the nozzle body to be resettable and movable, and the valve needle moves to be separated from or against the output end of the nozzle body; the mobile driver is installed at the feeding station, and the output end of the mobile driver is connected to the valve needle, so as to drive the valve needle to reset and move; The flow channel body is provided with a first heating groove on the outer contour of each of the feeding stations, and the flow channel temperature control device is installed in the first heating groove; the first temperature control shell and the second temperature control shell are respectively sleeved on the outer side of the nozzle body, and the second temperature control shell is close to the output end of the nozzle body; the heating end of the first temperature control device is located in the first temperature control shell; the heating end of the second temperature control device is located in the second temperature control shell; The delayed start controller is communicatively connected to the mobile drive, the primary temperature control device and the secondary temperature control device respectively, and is used to control the delayed start of the mobile drives of two adjacent feeding stations in sequence, and to control the temperature of the primary temperature control device and the secondary temperature control device in the corresponding feeding station before the mobile drive is started.

2. A hot runner structure with segmented control according to claim 1, characterized in that: The heating end of the secondary temperature control device sequentially passes through the first temperature control shell and the second temperature control shell, and the heating end of the secondary temperature control device in a section of the first temperature control shell serves as the primary temperature control device; The first temperature control shell is provided with an airtight groove for accommodating a heat-conducting medium between the primary temperature control device and the outer side surface of the nozzle body, so that the temperature of the nozzle body at the first temperature control shell is lower than the temperature at the second temperature control shell.

3. A hot runner structure with segmented control according to claim 2, characterized in that: The heating end of the secondary temperature control device comprises: a first heating section, a connecting section, and a second heating section; The first heating section is connected to the second heating section through the connecting section; the first heating section can be relatively movably arranged in the first temperature-controlled shell, the second heating section can be relatively movably arranged in the second temperature-controlled shell, and the connecting section extends along the length direction of the nozzle body; The first temperature control shell is movably and adjustably sleeved on the outer side of the nozzle body and moves along the length direction of the connecting section.

4. A hot runner structure with segmented control according to claim 3, characterized in that: The outer surface of the first temperature control shell is provided with a vent hole connected to the air-insulating groove; the heat-conducting medium is air; and the heating end of the secondary temperature control device is provided with a resistor.

5. The hot runner structure with segmented control according to claim 1, characterized in that: The moving driver is a cylinder.

6. The hot runner structure with segmented control according to claim 1, characterized in that: Also includes: Rack and position adjustment drives; The flow channel body is installed on the frame; The output end of the position adjustment driver is connected to the flow channel body, and is used to drive the flow channel body to move, thereby driving the frame to move; The control end of the nozzle assembly and the delayed start controller are respectively mounted on the frame.

7. The hot runner structure of segmented control according to claim 6, characterized in that: Also includes: U-shaped metal arm; The frame is provided with a frame opening; a U-shaped opening is provided on one side of the U-shaped metal arm, and the U-shaped metal arm is fixed to the inner wall of the frame opening on the opposite side of the U-shaped opening, and the U-shaped metal arm is connected to one of the feeding stations through the U-shaped opening, so that the flow channel body is limited to the frame opening through multiple U-shaped metal arms; a buffer gap is formed between the inner wall of the frame opening and the flow channel body.

8. An injection molding device, characterized in that: A hot runner structure with segmented control as described in any one of claims 1 to 7 is provided.

9. An injection molding process, characterized in that: A hot runner structure with segmented control as described in any one of claims 1 to 7 comprises the following steps: (1) Input the size parameters of the injection molded parts into the system in advance and divide them into different molding areas according to the injection molding sequence. Each molding area corresponds to a feeding station of the runner body. (2) starting and controlling the flow channel temperature control device, the primary temperature control device and the secondary temperature control device in each feeding station according to the size parameters of the injection molded part to preheat the flow channel body; (3) Injection molding material is introduced into the input end of the material channel, and the injection molding material is transported to the inside of the nozzle body through the feeding station; the delay start controller controls the heating temperature of the primary temperature control device and / or the secondary temperature control device to the storage temperature; (4) Injecting the nozzle body of one of the feeding stations into the front molding area in the injection molding sequence; before the nozzle body is about to complete the injection molding, the delayed start controller first controls the heating temperature of the secondary temperature control device in the next adjacent feeding station to rise to the output temperature, and the nozzle body of the next adjacent feeding station continues to inject into the corresponding molding area; repeat this step until the nozzle bodies of multiple feeding stations continuously complete the injection molding of multiple molding areas in the injection molding sequence.

10. Use of a hot runner structure in injection molding, characterized in that: The hot runner structure is a segmented controlled hot runner structure as described in any one of claims 1 to 7.

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