Laminated double-forming mold and flat product injection molding device

Abstract

The invention discloses a laminated double-forming mold and a flat product injection molding device. The laminated double-forming mold comprises a feeding mechanism and a mold main body, secondary discharging surfaces are respectively arranged on two opposite surfaces of the splitter plate, and secondary feeding holes communicated with the sub-runners are formed in the secondary discharging surfaces; the output end of the main feeding nozzle is communicated with the sub-runner; the main feeding driver is used for driving the main needle valve to move on the main feeding nozzle in a limited mode. A plurality of auxiliary feeding nozzles are respectively mounted on the auxiliary discharging surfaces; the auxiliary feeding driver is used for driving the auxiliary needle valve to move on the auxiliary feeding nozzle in a limited mode. The main feeding nozzle is contained in the first split mold, and the feeding port is exposed out of the surface of the first split mold. Part of the auxiliary feeding nozzles contain the first split mold, and the output ends of the part of the auxiliary feeding nozzles communicate with a mold cavity of the first split mold; part of the auxiliary feeding nozzles contain the second split mold, and the output ends of part of the auxiliary feeding nozzles communicate with a mold cavity of the second split mold. According to the scheme, the problems of low production efficiency and large product difference caused by the fact that an existing mold can only produce a single product are solved.

Description

Technical Field

[0001] The present invention relates to the field of molds, and particularly to a laminated double molding die and an injection molding device for flat products. Background Art

[0002] In the traditional injection molding process, for large injection molded parts, injection is mainly carried out simultaneously by nozzles acting on different regions. However, since the material needs to pass through different regions from input to output to reach different nozzles and then be output through the nozzles, differences in the conveying distance, conveying temperature, pressure, etc. of the material during conveyance will cause the material to have different physical parameters when output from different nozzles. Especially for the nozzle farthest from the input end, the difference between the material output from the farthest and the nearest nozzles is the largest. Therefore, for large injection molded parts, the bonding degree between adjacent two injection regions is poor, and thus there is a weld line between different molding regions, affecting the quality and aesthetics of the large injection molded parts. At the same time, the existing single die can only produce a single large product. If multiple cavities are directly set on a single die, based on the above-mentioned conveyance differences of the material, the molding differences of the material in different cavities are even greater, and multiple feeding mechanisms need to be used, which not only occupies a large space but also increases the equipment cost. Especially when the die is opened, the devices outside the die need to be disassembled, prolonging the installation and disassembly time of the die and reducing the processing efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a laminated double molding die, in which the feeding mechanism is arranged between the first split die and the second split die of the laminate, and two products can be produced simultaneously and continuously, and the molding environments of the products are nearly the same, reducing the molding differences and gate ratios of the two products.

[0004] The present invention also provides an injection molding device for flat products, which uses the above-mentioned laminated double molding die.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A laminated double molding die, comprising: a feeding mechanism and a die body;

[0007] The feeding mechanism includes: a manifold, a feed inlet, a main feed nozzle, a main needle valve, a main feed driver, a secondary feed nozzle, a secondary needle valve, and a secondary feed driver;

[0008] The inside of the flow splitter plate is provided with a flow splitting channel; the flow splitter plate is provided with auxiliary discharge surfaces on two opposite surfaces, and the auxiliary discharge surfaces are provided with auxiliary feed ports communicating with the flow splitting channel; the input end of the main feed nozzle communicates with the feed port, and the output end of the main feed nozzle communicates with the flow splitting channel; the output end of the main feed driver is connected to the main needle valve for driving the main needle valve to move in a limited manner in the main feed nozzle; a plurality of the auxiliary feed nozzles are respectively installed on the auxiliary discharge surfaces, and the input ends of the auxiliary feed nozzles communicate with the auxiliary feed ports; the output end of the auxiliary feed driver is connected to the auxiliary needle valve for driving the auxiliary needle valve to move in a limited manner in the auxiliary feed nozzle;

[0009] The mold body includes: a first mold half and a second mold half that are stacked on each other;

[0010] The flow splitter plate is arranged between the first mold half and the second mold half; the main feed nozzle is accommodated in the first mold half, and the feed port is exposed on the surface of the first mold half; part of the auxiliary feed nozzles are accommodated in the first mold half, and the output ends of part of the auxiliary feed nozzles communicate with the cavity of the first mold half; part of the auxiliary feed nozzles are accommodated in the second mold half, and the output ends of part of the auxiliary feed nozzles communicate with the cavity of the second mold half.

[0011] Optimally, the feeding mechanism includes: a docking seat;

[0012] The docking seat is installed on the first mold half; the docking seat is provided with a docking port, the input end of the main feed nozzle abuts against one end of the docking port, and the other end of the docking port communicates with the feed port;

[0013] The main feed driver is accommodated in the second mold half, and the main feed driver drives the main needle valve to abut against the input end of the main feed nozzle.

[0014] Optimally, the first mold half includes: a first male mold and a first female mold; the first male mold is movably and adjustably installed on the first female mold;

[0015] The second mold half includes: a second male mold and a second female mold; the second male mold is movably and adjustably installed on the second female mold;

[0016] The first male mold, the first female mold, the flow splitter plate, the second male mold and the second female mold are stacked in sequence; the docking seat is fixed to the first male mold; the main feed nozzle vertically penetrates through the first male mold and the first female mold;

[0017] The main feed driver is installed on the second male mold.

[0018] Optimally, it further includes: a moving driver;

[0019] One of the fixed end and the output end of the described moving driver is connected to the first male mold, and the other of the two is connected to the first female mold, for driving the first male mold and the first female mold to move relatively along the stacking direction;

[0020] One of the fixed end and the output end of the described moving driver is connected to the second male mold, and the other of the two is connected to the second female mold, for driving the second male mold and the second female mold to move relatively along the stacking direction.

[0021] Optimally, the mold body further includes: an opening mold guide groove and an opening mold moving block;

[0022] The opening mold guide groove extends along the stacking direction of the first mold half and the second mold half; the opening mold moving block is limited to move in the opening mold guide groove;

[0023] One of the described opening mold guide groove and the opening mold moving block is connected to the first male mold, and the other of the two is connected to the first female mold;

[0024] One of the described opening mold guide groove and the opening mold moving block is connected to the second male mold, and the other of the two is connected to the second female mold.

[0025] Optimally, the manifold is detachably connected to the first female mold and the second male mold;

[0026] The upper end of one of the opening mold guide grooves is connected to the first male mold, and the lower end of the opening mold guide groove extends downward to the second mold half;

[0027] The lower end of one of the opening mold guide grooves is connected to the second female mold, and the upper end of the opening mold guide groove extends upward to the first mold half;

[0028] The opening mold moving blocks are respectively installed on the first female mold and the second male mold.

[0029] Optimally, it further includes: a delay start component;

[0030] The delay start component includes: a runner temperature control device, a primary temperature control device, a secondary temperature control device, a first temperature control shell, a second temperature control shell and a delay start controller;

[0031] The secondary discharge surface is provided with a plurality of continuously distributed feeding stations, and the outer contour of each feeding station is provided with a first heating groove; any number of the secondary feeding nozzles are installed at the feeding stations; the runner temperature control device is respectively installed in the first heating groove; the first temperature control shell and the second temperature control shell are respectively sleeved on the outer side surface of the secondary feeding nozzle, and the second temperature control shell is close to the output end of the secondary feeding nozzle; the heating end of the primary temperature control device is located in the first temperature control shell; the heating end of the secondary temperature control device is located in the second temperature control shell;

[0032] The delay start controller is respectively communicatively connected to the secondary feeding driver, the primary temperature control device and the secondary temperature control device, and is used for controlling the secondary feeding drivers of adjacent two feeding stations to start sequentially with a time delay, and controlling the temperatures of the primary temperature control device and the secondary temperature control device in the corresponding feeding station before the secondary feeding driver starts.

[0033] Optimally, two of the feeding stations partially located on the front and back sides are symmetrically distributed, the secondary feeding nozzles are installed at the feeding stations on one side, the secondary feeding drivers are installed at the feeding stations on the other side, and the secondary needle valves transition from the feeding stations on one side to the feeding stations on the other side; the symmetrically distributed feeding stations use the same runner temperature control device.

[0034] Optimally, the cavity contours of the first split mold and the second split mold are symmetrically distributed with the flow splitter plate as the center.

[0035] An injection molding device for flat products is provided with the above-mentioned stacked double molding die.

[0036] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0037] This solution provides a stacked double molding die, which arranges the feeding mechanism between the first split mold and the second split mold of the stack, and can simultaneously and continuously produce two products. The molding environments of the products are close to the same, reducing the molding differences and gate ratios of the two products, and solving the problems of low production efficiency and large product differences caused by the existing molds that can only produce single products. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of one embodiment of the stacked double molding die;

[0039] Figure 2 is a schematic sectional structural diagram of one embodiment of the stacked double molding die;

[0040] Figure 3 is a schematic side view structural diagram of one embodiment of the stacked double molding die;

[0041] Figure 4 It is a schematic structural diagram of one embodiment of the feeding mechanism;

[0042] Figure 5 It is a schematic sectional structural diagram of one embodiment of the feeding mechanism.

[0043] Wherein:

[0044] Feeding mechanism 1, mold main body 2; moving drive 3; delay start component 4;

[0045] Manifold plate 10, feed inlet 11, main feed nozzle 12, main needle valve 13, main feed drive 14, sub-feed nozzle 15, sub-needle valve 16, sub-feed drive 17; docking seat 18;

[0046] Runner 101; sub-discharge surface 102; sub-feed inlet 103; feeding station 104; first heating tank 105;

[0047] Docking port 181;

[0048] Mold cavity 20; first mold half 21, second mold half 22; mold opening guide groove 23, mold opening moving block 24;

[0049] First male mold 211, first female mold 212; second male mold 221, second female mold 222;

[0050] Runner temperature control device 41, primary temperature control device 42, secondary temperature control device 43, first temperature control housing 44, second temperature control housing 45; Detailed implementation manners

[0051] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe the features, without order or importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is more than two.

[0053] Such as Figures 1-5 , a laminated double molding die, comprising: a feeding mechanism 1 and a die body 2;

[0054] The feeding mechanism 1 includes: a manifold 10, a feed inlet 11, a main feed nozzle 12, a main needle valve 13, a main feed driver 14, a sub-feed nozzle 15, a sub-needle valve 16 and a sub-feed driver 17;

[0055] The interior of the manifold 10 is provided with a manifold channel 101; the manifold 10 is provided with sub-outlet surfaces 102 on two opposite surfaces, and the sub-outlet surfaces 102 are provided with sub-feed inlets 103 communicating with the manifold channel 101; the input end of the main feed nozzle 12 communicates with the feed inlet 11, and the output end of the main feed nozzle 12 communicates with the manifold channel 101; the output end of the main feed driver 14 is connected to the main needle valve 13 for driving the main needle valve 13 to move in a limited manner within the main feed nozzle 12; a plurality of the sub-feed nozzles 15 are respectively installed on the sub-outlet surfaces 102, and the input end of the sub-feed nozzle 15 communicates with the sub-feed inlet 103; the output end of the sub-feed driver 17 is connected to the sub-needle valve 16 for driving the sub-needle valve 16 to move in a limited manner within the sub-feed nozzle 15;

[0056] The die body 2 includes: a first split die 21 and a second split die 22 that are stacked on each other;

[0057] The flow splitting plate 10 is disposed between the first split mold 21 and the second split mold 22; the main feed nozzle 12 is received in the first split mold 21, and the feed port 11 is exposed on the surface of the first split mold 21; part of the sub-feed nozzles 15 are received in the first split mold 21, and the output ends of part of the sub-feed nozzles 15 communicate with the cavity 20 of the first split mold 21; part of the sub-feed nozzles 15 are received in the second split mold 22, and the output ends of part of the sub-feed nozzles 15 communicate with the cavity 20 of the second split mold 22.

[0058] This solution provides a laminated double molding die. By arranging the feeding mechanism 1 between the first split mold 21 and the second split mold 22 of the laminate, two products can be produced simultaneously and continuously. The molding environments of the products are nearly the same, reducing the molding differences and gate ratios of the two products, and solving the problems of low production efficiency and large product differences caused by the existing die that can only produce a single type of product.

[0059] Specifically, the first split mold 21 and the second split mold 22 are in a state of being superposed on each other (the manifold 10 is accommodated inside the first split mold 21 and / or the second split mold 22), that is, they can be directly superposed into one body; the first split mold 21 and the second split mold 22 can also be separated by other structures (such as the manifold 10 in the figure); in this solution, the main feed nozzle 12 penetrates through the first split mold 21, the output end of the main feed nozzle 12 communicates with the flow channels 101 of the manifold 10, and a main needle valve 13 is provided inside the main feed nozzle 12. According to common knowledge, the movement of the main needle valve 13 in the main feed nozzle 12 can expose or block the output end of the main feed nozzle 12, so as to control the entry and exit of materials at the feed nozzle; the main feed nozzle 12 is used to output materials to the flow channels 101 of the manifold 10; and the manifold 10 is provided with secondary discharge surfaces 102 on two opposite surfaces respectively, and secondary feed nozzles 15 are respectively installed at the secondary feed ports 103 of each secondary discharge surface 102, that is, the manifold 10 can output materials in two opposite directions; and because the secondary feed nozzles 15 are located in different directions of the manifold 10, some secondary feed nozzles 15 penetrate through the first split mold 21, and some secondary feed nozzles 15 penetrate through the second split mold 22. The secondary feed nozzles 15 can be used to output materials to the mold cavities 20 of the first split mold 21 or the second split mold 22; similarly, the output end of the secondary feed driver 17 is connected to the secondary needle valve 16, which is used to drive the secondary needle valve 16 to move in a limited manner in the secondary feed nozzle 15, so as to expose or block the output end of the secondary feed nozzle 15, so as to control the output of materials to the mold cavities 20 of the first split mold 21 and / or the second split mold 22; and a single flow channel 101 of this solution can be respectively communicated with the mold cavities 20 of the first split mold 21 and the second split mold 22, and materials can be output from the flow channels 101 to the mold cavities 20 of the first split mold 21 and the second split mold 22 at the same time. Therefore, the output paths and output parameters of the materials can be close to the same, reducing the molding differences between the two products. At the same time, a single mold body 2 can directly produce two products, and the products can be two completely identical products. This solution can achieve the effect of dual production. Further, the first split mold 21 can be used to mold component 1, and the second split mold 22 can be used to mold component 2. Component 1 and component 2 can be combined into one body, and because the molding differences of the products are minimized, the combination effect of the components is the best.

[0060] Optimally, the feeding mechanism 1 includes: a docking seat 18;

[0061] The docking seat 18 is installed on the first split mold 21; the docking seat 18 is provided with a docking port 181, the input end of the main feed nozzle 12 abuts against one end of the docking port 181, and the other end of the docking port 181 communicates with the feed port 11.

[0062] The main feed driver 14 is accommodated in the second split mold 22, and the main feed driver 14 drives the main needle valve 13 to abut against the input end of the main feed nozzle 12.

[0063] In this solution, the main feed driver 14 drives the main needle valve 13 to abut reversely against the position of the docking port 181, so that the main feed driver 14 can be received in the second mold half 22. This can avoid the vertical arrangement of the main feed driver 14 at the position of the docking port 181, and can make full use of the space of the second mold half 22, making the structure of the stacked double molding die more compact. Most importantly, the main feed driver 14 does not occupy the space position of the feed port 11, that is, the reverse drive setting of the main feed driver 14 does not affect the normal mold opening. Furthermore, the main needle valve 13 does not pass through the feed port 11, which can skillfully avoid the need to disassemble the main feed driver 14 and the main needle valve 13 when the first mold half 21 and the second mold half 22 are opened.

[0064] Optimally, the first mold half 21 includes: a first male mold 211 and a first female mold 212; the first male mold 211 is movably and adjustably installed on the first female mold 212;

[0065] The second mold half 22 includes: a second male mold 221 and a second female mold 222; the second male mold 221 is movably and adjustably installed on the second female mold 222;

[0066] The first male mold 211, the first female mold 212, the manifold plate 10, the second male mold 221 and the second female mold 222 are stacked in sequence; the docking seat 18 is fixed to the first male mold 211; the main feed nozzle 12 vertically penetrates through the first male mold 211 and the first female mold 212;

[0067] The main feed driver 14 is installed on the second male mold 221.

[0068] The structure of the stacked double molding die in this solution is compact, and it can install the feed port 11 for feeding, as well as the main feed nozzle 12 and the main needle valve 13 for controlling the feed, in a limited space. Especially on the premise of a compact structure, the first mold half 21 and the second mold half 22 can still be independently opened when they are in the stacked state without affecting each other. Specifically, the first male mold 211, the first female mold 212, the manifold plate 10, the second male mold 221 and the second female mold 222 are stacked in sequence. The first male mold 211 can move relative to the first female mold 212, and the first male mold 211 drives the docking seat 18 to move, so that the docking seat 18 is separated from the main feed nozzle 12, thereby exposing the cavity 20 of the first mold half 21. Further, the second male mold 221 can also be driven to move, so as to drive the first female mold 212 and the manifold plate 10 at the stacked position of the second male mold 221 to move, thereby exposing the cavity 20 of the second mold half 22, and without the need to disassemble the main feed nozzle 12, the main needle valve 13, the main feed driver 14, the auxiliary feed nozzle 15, the auxiliary needle valve 16 and the auxiliary feed driver 17, which simplifies the mold opening on the basis of realizing double molding products.

[0069] Optimally, it further includes: a moving driver 3;

[0070] One of the fixed end and the output end of the part of the moving driver 3 is connected to the first male mold 211, and the other of the two is connected to the first female mold 212, for driving the first male mold 211 and the first female mold 212 to move relatively in the stacking direction;

[0071] One of the fixed end and the output end of the part of the moving driver 3 is connected to the second male mold 221, and the other of the two is connected to the second female mold 222, for driving the second male mold 221 and the second female mold 222 to move relatively in the stacking direction.

[0072] In the first male mold 211, the first female mold 212, the manifold plate 10, the second male mold 221 and the second female mold 222 of this solution are in a vertically stacked state; in this regard, this solution only needs to use the moving driver 3 to drive the first split mold 21 and the second split mold 22 to move in the stacking direction, and the mold can be quickly opened; specifically, the moving driver 3 is a mechanism known to have a driving and moving function, such as a combination of a cylinder, an oil cylinder, a motor and a lead screw, a manipulator, etc., as long as it can realize driving and moving. Start one of the moving drivers 3, and its output end moves relative to the fixed end, thereby driving the first male mold 211 to move relative to the first female mold 212, realizing the opening of the first split mold 21; similarly, start one of the moving drivers 3, and its output end moves relative to the fixed end, thereby driving the second male mold 221 to move relative to the second female mold 222, realizing the opening of the second split mold 22; thus, when the stacked double-molding mold of this solution produces double products on the premise of a compact structure, the mold opening is convenient.

[0073] The moving driver 3 is a mechanism known to have a driving and moving function, such as a cylinder, an oil cylinder, a manipulator, an electric hoist, etc., as long as it can realize driving and lifting.

[0074] Optimally, the mold body 2 further includes: a mold-opening guide groove 23 and a mold-opening moving block 24;

[0075] The mold-opening guide groove 23 extends along the stacking direction of the first split mold 21 and the second split mold 22; the mold-opening moving block 24 is limited to move in the mold-opening guide groove 23;

[0076] One of the mold-opening guide groove 23 and the mold-opening moving block 24 of the part is connected to the first male mold 211, and the other of the two is connected to the first female mold 212;

[0077] One of the mold-opening guide groove 23 and the mold-opening moving block 24 of the part is connected to the second male mold 221, and the other of the two is connected to the second female mold 222.

[0078] In this solution, the mold opening guide groove 23 and the mold opening moving block 24 are used to guide the mold body 2. The mold opening moving block 24 moves along the superposition direction of the first mold half 21 and the second mold half 22 under the limiting action of the mold opening guide groove 23, so as to guide the opening or closing of the first male mold 211 and the first female mold 212 in the superposition direction, and / or guide the opening or closing of the second male mold 221 and the second female mold 222 in the superposition direction, thereby improving the smoothness of mold opening or closing.

[0079] Optimally, the manifold plate 10 is detachably connected to the first female mold 212 and the second male mold 221;

[0080] The upper end of one of the mold opening guide grooves 23 is connected to the first male mold 211, and the lower end of the mold opening guide groove 23 extends downward to the second mold half 22;

[0081] The lower end of one of the mold opening guide grooves 23 is connected to the second female mold 222, and the upper end of the mold opening guide groove 23 extends upward to the first mold half 21;

[0082] The mold opening moving blocks 24 are respectively installed on the first female mold 212 and the second male mold 221;

[0083] In this solution, the first mold half 21 and the second mold half 22 can be opened by the moving drive 3, mainly to take out the product in the mold cavity 20 when the molding is completed; and when the mold cavity 20 needs to be maintained, the mold opening guide groove 23 can be used to lift the mold opening moving block 24; specifically, since the lower end of one of the mold opening guide grooves 23 extends downward to the second mold half 22, the downward length of the mold opening guide groove 23 can be extended; the upper end of the other mold opening guide groove 23 extends upward to the first mold half 21, so the upward length of the mold opening guide groove 23 is also extended; in this regard, when the first male mold 211 is driven to move upward, the mold opening moving block 24 of the first female mold 212 moves relatively to the lower end of the mold opening guide groove 23, and the lower end of the mold opening guide groove 23 lifts the mold opening moving block 24 of the first female mold 212 upward, thereby lifting the first female mold 212; since the manifold plate 10 is connected to both the first female mold 212 and the second male mold 221 at the same time, the first female mold 212 drives the second male mold 221 to move upward through the manifold plate 10, and the mold cavities 20 of both the first mold half 21 and the second mold half 22 can be directly exposed, so that a single drive source can complete the complete mold opening of the stacked double molding mold, and the mold cavities 20 can be maintained separately.

[0084] Optimally, it further includes: a delay start component 4;

[0085] The delay start component 4 includes: a runner temperature control device 41, a primary temperature control device 42, a secondary temperature control device 43, a first temperature control shell 44, a second temperature control shell 45 and a delay start controller;

[0086] The secondary discharge surface 102 is provided with a plurality of continuously distributed feeding stations 104, and the outer contour of each feeding station 104 is provided with a first heating groove 105; any number of the secondary feeding nozzles 15 are installed at the feeding stations 104; the flow channel temperature control device 41 is respectively installed in the first heating groove 105; the first temperature control shell 44 and the second temperature control shell 45 are respectively sleeved on the outer side surface of the secondary feeding nozzle 15, and the second temperature control shell 45 is close to the output end of the secondary feeding nozzle 15; the heating end of the primary temperature control device 42 is located in the first temperature control shell 44; the heating end of the secondary temperature control device 43 is located in the second temperature control shell 45;

[0087] The delay start controller is respectively communicatively connected to the secondary feeding driver 17, the primary temperature control device 42 and the secondary temperature control device 43, and is used to control the sequential delay start of the secondary feeding drivers 17 of two adjacent feeding stations 104, and control the temperatures of the primary temperature control device 42 and the secondary temperature control device 43 in the corresponding feeding station 104 before the secondary feeding driver 17 starts.

[0088] This solution also adds a delay start component 4, which can divide a plurality of feeding stations 104 on the flow dividing plate 10. Each feeding station 104 corresponds to a single or multiple secondary feeding nozzles 15. This solution uses a delay start controller to control the movement of the secondary needle valve 16 in the secondary feeding nozzle 15, and can also control the temperatures of the primary temperature control device 42 and the secondary temperature control device 43 as needed, which can ensure that the material enters the mold at the optimal temperature during delayed injection, and solves the problem that the bonding degree becomes poor due to differences in the parameters of the material during injection in the multi-station injection of large plastic parts.

[0089] Specifically, the flow splitter plate 10 is provided with a plurality of feeding stations 104, and each feeding station 104 corresponds to different regions of the large plastic injection part. In the traditional injection molding process, if the large plastic injection part is directly injection molded in different regions simultaneously, after the material is input from the input end of the flow splitter plate 10, it needs to pass through the input ends of the secondary feeding nozzles 15 in different regions before it can be output from the output end of the secondary feeding nozzle 15. The differences in the conveying distance, conveying temperature, pressure, etc. during this period will cause the material to have different physical parameters when output from different secondary feeding nozzles 15. Especially for the feeding station 104 farthest from the input end, the physical parameter differences are the largest, resulting in a poor bonding degree between adjacent two injection regions, and thus there are bonding lines between different forming regions, and it is also easy to appear gate marks, affecting the quality and aesthetics of the large plastic injection part. In response to this, in this solution, the flow splitter plate 10 is provided with a plurality of feeding stations 104; the flow channels 101 in the flow splitter plate 10 flow through a plurality of feeding stations 104 and output materials to the secondary feeding nozzles 15 of the feeding stations 104 respectively; the flow splitter plate 10 is respectively provided with a first heating groove 105 at each feeding station 104, and a flow channel temperature control device 41 is respectively installed in the first heating groove 105 of each feeding station 104 for independently controlling the temperature of this feeding station 104. Therefore, the material can maintain the best conveying temperature when flowing through the feeding stations 104 in sequence. For example, when the temperature of the material is too high and causes the temperature of a certain feeding station 104 to be too high, the material raises the temperature of the feeding station 104. Therefore, the flow channel temperature control device 41 of this feeding station 104 can stop heating to keep the temperature of this feeding station 104 within the preset temperature range. Similarly, when the temperature of the material is too low and absorbs the heat of this feeding station 104, the material lowers the temperature of the feeding station 104. Therefore, the flow channel temperature control device 41 of this feeding station 104 can start the heating function to keep the temperature of this feeding station 104 within the preset temperature range. In this way, the material is at the preset temperature from the input end of the flow splitter plate 10 to the feeding station 104, and the preset temperature is set comprehensively considering factors such as production experience and heat loss. At this preset temperature, it will not affect the subsequent forming.When the material is conveyed to the feeding station 104, the material continues to transfer into the interior of the auxiliary feeding nozzle 15. The auxiliary needle valve 16 can control the output or closing of the material during the reset movement of the auxiliary feeding nozzle 15. When the auxiliary needle valve 16 moves to abut against the output end of the auxiliary feeding nozzle 15, the material cannot be output from the auxiliary feeding nozzle 15 to the outside. When the auxiliary needle valve 16 moves away from the output end of the auxiliary feeding nozzle 15, the material can be output from the auxiliary feeding nozzle 15 to the outside. The auxiliary needle valve 16 of each auxiliary feeding nozzle 15 is respectively driven to move by an independent auxiliary feeding driver 17. And in this solution, a delay start controller is used to control the delay start between the auxiliary feeding drivers 17 of two adjacent feeding stations 104. For example, when the 1# auxiliary needle valve 16 corresponding to the 1# auxiliary feeding driver 17 completes or is about to complete the blocking of the output end of the 1# auxiliary feeding nozzle 15, the delay start controller starts the 2# auxiliary feeding driver 17 corresponding to the 2# auxiliary feeding nozzle 15 of the feeding station 104 adjacent to the 1# auxiliary feeding nozzle 15. The 2# auxiliary feeding driver 17 drives the 2# auxiliary needle valve 16 to open the output end of the 2# auxiliary feeding nozzle 15, and so on until the n# auxiliary feeding nozzle 15 of the last feeding station 104 completes injection molding. In this regard, since the n - 1# auxiliary feeding nozzle 15 and the n# auxiliary feeding nozzle 15 are adjacent, when the n - 1# auxiliary feeding nozzle 15 completes or is about to complete injection molding of a certain area, the delay start controller immediately starts the adjacent n# auxiliary feeding nozzle 15 to continue injection molding of the adjacent area, and the physical parameter differences of the materials in the two areas are minimized. Especially, in this solution, a first temperature control shell 44 and a second temperature control shell 45 are also arranged outside the auxiliary feeding nozzle 15, and the temperature before and after injection molding of the auxiliary feeding nozzle 15 is controlled by a primary temperature control device 42 and a secondary temperature control device 43. Specifically, the heating end of the primary temperature control device 42 is used to heat the first temperature control shell 44, and the heating end of the secondary temperature control device 43 is used to heat the second temperature control shell 45. The second temperature control shell 45 is close to the output end of the auxiliary feeding nozzle 15, that is, mainly used to keep the temperature of the output part of the material. Relatively, the first temperature control shell 44 can mainly keep the temperature of the material between the input end and the second temperature control shell 45. And because different feeding stations 104 adopt delayed discharging, if the output temperature is still used to keep the temperature of the material during the delay waiting period, it may cause the material to be in a high temperature and high pressure state, which may affect chemical stability (such as coking due to local overheating). In this regard, in this solution, the first temperature control shell 44 and the second temperature control shell 45 are used to adopt segmented temperature control for the storage area and the output area of the auxiliary feeding nozzle 15 respectively. During the delay waiting period, the temperature of the second temperature control shell 45 is controlled at a storage temperature lower than the output temperature, and the temperature of the first temperature control shell 44 is controlled at a temperature lower than or equal to the storage temperature. When the nozzle discharges material, the secondary temperature control device 43 can be controlled to start the heating function to raise the temperature of the second temperature control shell 45 to the output temperature, so as to facilitate the material to be output for injection molding in the best state.Thus, the feature of segmented temperature control of the secondary feed nozzle 15 in this solution can avoid the situation that the chemical stability of the material is affected by overheating during delayed injection. That is, this solution can solve the problem of poor bonding caused by differences in material injection parameters during multi-station injection molding of large plastic parts.

[0090] The communication connection method here refers to the establishment of communication between connected devices through signal transmission and interaction, which can be divided into wired connection and wireless connection; wired connection such as conventional data cable connection; wireless connection such as conventional WiFi, Bluetooth, infrared, NFC, etc.

[0091] The runner temperature control device, the primary temperature control device, and the secondary temperature control device are publicly known mechanisms with heating functions. The heating method and principle can be selected according to needs as long as the heating function is achieved.

[0092] Optimally, two of the feeding stations 104 located on the front and back sides are symmetrically distributed. The secondary feed nozzle 15 is installed at the feeding station 104 on one side, the secondary feed driver 17 is installed at the feeding station 104 on the other side, and the secondary needle valve 16 transitions from the feeding station 104 on one side to the feeding station 104 on the other side; the symmetrically distributed feeding stations 104 use the same runner temperature control device 41.

[0093] The manifold plate 10 of this solution is provided with secondary discharge surfaces 102 on two opposite sides, and each secondary discharge surface 102 can be provided with multiple feeding stations 104, that is, the manifold plate 10 is provided with multiple feeding stations 104 on the front and back sides respectively; and some of the feeding stations 104 on the front and back sides are symmetrically distributed, and the secondary feed nozzle 15, the secondary needle valve 16, and the secondary feed driver 17 penetrate through the two front and back feeding stations 104 in sequence. Therefore, one of the feeding stations 104 is installed with the secondary feed nozzle 15 and the secondary feed driver 17 of the secondary feed nozzle 15 at the other opposite feeding station 104; in this regard, when the material is transferred from the runner 101 to the symmetric feeding stations 104, the material maintains the same feeding environment, which can ensure that the molding environment of the material in the first demolding 21 and the second demolding 22 is consistent.

[0094] Optimally, the contours of the mold cavities 20 of the first demolding 21 and the second demolding 22 are symmetrically distributed with the manifold plate 10 as the center.

[0095] This solution can use the first split mold 21 and the second split mold 22 to simultaneously mold the same product. Based on the two feeding stations 104 on the front and back sides being symmetrically distributed, the output process of the material is nearly the same. Using the same runner temperature control device 41 for the feeding station 104, and the primary temperature control device 42 and the secondary temperature control device 43 to control the sequential delayed start of the secondary feeding drivers 17 of two adjacent feeding stations 104, the effect of small differences and no gate can be achieved during product molding, which is very suitable for the molding of large products.

[0096] An injection molding device for flat products is provided with the above-mentioned laminated double molding die.

[0097] The injection molding device of this solution uses a laminated double molding die, which is most suitable for flat large products, such as for air conditioner grilles. Because the thickness of the air conditioner grille is small, the total die thickness of the two die bodies 2 for molding the air conditioner grille will not exceed the stroke of the molding machine. Therefore, when used to mold the air conditioner grille, it will not increase the clamping force of the machine. Two products of the same size can be produced at one time with the same die. In addition, the process parameters such as temperature, pressure, and holding pressure for the molding of the two products are the same, so the product quality is stable. Further, other applicable flat products include, for example, dinner plates, food boxes, fresh-keeping boxes, and electrical appliance back covers.

[0098] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A laminated double molding die, characterized in that, it includes: a feeding mechanism and a die body; The feeding mechanism includes: a flow splitter plate, a feeding port, a main feeding nozzle, a main needle valve, a main feeding driver, a secondary feeding nozzle, a secondary needle valve and a secondary feeding driver; A flow channel is provided inside the flow splitter plate; the flow splitter plate is provided with secondary discharge surfaces on two opposite surfaces, and the secondary discharge surfaces are provided with secondary feeding ports communicating with the flow channel; the input end of the main feeding nozzle communicates with the feeding port, and the output end of the main feeding nozzle communicates with the flow channel; the output end of the main feeding driver is connected to the main needle valve for driving the main needle valve to move in a limited manner in the main feeding nozzle; a plurality of the secondary feeding nozzles are respectively installed on the secondary discharge surfaces, and the input ends of the secondary feeding nozzles communicate with the secondary feeding ports; the output end of the secondary feeding driver is connected to the secondary needle valve for driving the secondary needle valve to move in a limited manner in the secondary feeding nozzle; The die body includes: a first sub-die and a second sub-die that are superposed on each other; The flow splitter plate is arranged between the first sub-die and the second sub-die; the main feeding nozzle is accommodated in the first sub-die, and the feeding port is exposed on the surface of the first sub-die; part of the secondary feeding nozzles are accommodated in the first sub-die, and the output ends of part of the secondary feeding nozzles communicate with the cavity of the first sub-die; part of the secondary feeding nozzles are accommodated in the second sub-die, and the output ends of part of the secondary feeding nozzles communicate with the cavity of the second sub-die.

2. The laminated double molding die according to claim 1, characterized in that, the feeding mechanism includes: a docking seat; The docking seat is installed on the first sub-die; the docking seat is provided with a docking port, the input end of the main feeding nozzle abuts against one end of the docking port, and the other end of the docking port communicates with the feeding port; The main feeding driver is accommodated in the second sub-die, and the main feeding driver drives the main needle valve to abut against the input end of the main feeding nozzle.

3. The laminated double molding die according to claim 2, characterized in that, The first sub-die includes: a first male die and a first female die; the first male die is movably and adjustably installed on the first female die; The second sub-die includes: a second male die and a second female die; the second male die is movably and adjustably installed on the second female die; The first male die, the first female die, the flow splitter plate, the second male die and the second female die are superposed in sequence; the docking seat is fixed to the first male die; the main feeding nozzle vertically penetrates through the first male die and the first female die; The main feeding driver is installed on the second male die.

4. The laminated double molding die according to claim 3, characterized in that, it further includes: a moving driver; One of the fixed end and the output end of part of the moving driver is connected to the first male die, and the other of the two is connected to the first female die for driving the first male die and the first female die to move relative to each other along the superposition direction; One of the fixed end and the output end of the partial mobile driver is connected to the second male mold, and the other one is connected to the second female mold, for driving the second male mold and the second female mold to move relatively along the superposition direction.

5. A laminated double molding die according to claim 3, wherein, the die body further includes: an opening die guide groove and an opening die moving block; the opening die guide groove extends along the superposition direction of the first split die and the second split die; the opening die moving block is limited to move in the opening die guide groove; One of the partial opening die guide groove and the opening die moving block is connected to the first male mold, and the other one is connected to the first female mold; One of the partial opening die guide groove and the opening die moving block is connected to the second male mold, and the other one is connected to the second female mold.

6. A laminated double molding die according to claim 5, wherein, the flow splitter plate is detachably connected to the first female mold and the second male mold; The upper end of one of the opening die guide grooves is connected to the first male mold, and the lower end of the opening die guide groove extends downward to the second split die; The lower end of one of the opening die guide grooves is connected to the second female mold, and the upper end of the opening die guide groove extends upward to the first split die; The opening die moving blocks are respectively installed on the first female mold and the second male mold.

7. A laminated double molding die according to any one of claims 1-6, wherein, further includes: a delay start component; The delay start component includes: a runner temperature control device, a primary temperature control device, a secondary temperature control device, a first temperature control shell, a second temperature control shell and a delay start controller; The secondary discharge surface is provided with a plurality of continuously distributed feeding stations, and the outer contour of each feeding station is provided with a first heating groove; any number of the secondary feeding nozzles are installed on the feeding stations; the runner temperature control device is respectively installed in the first heating groove; the first temperature control shell and the second temperature control shell are respectively sleeved on the outer side surface of the secondary feeding nozzle, and the second temperature control shell is close to the output end of the secondary feeding nozzle; the heating end of the primary temperature control device is located in the first temperature control shell; the heating end of the secondary temperature control device is located in the second temperature control shell; The delay start controller is respectively communicatively connected to the secondary feeding driver, the primary temperature control device and the secondary temperature control device, for controlling the secondary feeding drivers of adjacent two feeding stations to start sequentially with a time delay, and controlling the temperatures of the primary temperature control device and the secondary temperature control device in the corresponding feeding stations before the secondary feeding driver starts.

8. A laminated double molding die according to claim 7, wherein, Two of the feeding stations located on the front and back sides are symmetrically distributed, the secondary feeding nozzles are installed on the feeding stations on one side, the secondary feeding drivers are installed on the feeding stations on the other side, and the secondary needle valves transition from the feeding stations on one side to the feeding stations on the other side; the symmetrically distributed feeding stations use the same runner temperature control device.

9. A laminated double molding die according to claim 8, wherein, The cavity profiles of both the first split mold and the second split mold are symmetrically distributed around the manifold plate.

10. An injection molding device for flat products, characterized in that, it is provided with a laminated double molding die according to any one of claims 1-9.

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