Injection mold and injection method for vehicle-mounted electronic tag shell

Abstract

The present application relates to the technical field of automobile accessory forming, and particularly relates to an injection mold for a vehicle-mounted electronic tag shell, which comprises a fixed mold base and a movable mold base, the fixed mold base is provided with a middle core, a first row position and a second row position, and the middle core, the first row position and the second row position can form a side shell forming cavity; the movable mold base is provided with a top shell forming cavity for injection molding a top part of the vehicle-mounted electronic tag shell; the middle core is provided with a first gas needle capable of moving up and down, the first gas needle is connected with a gas generating device through a first gas pipe; a first gas outlet is arranged on the top of the side surface of the first gas needle, the first gas outlet can inject high-pressure gas between the middle core and the inner side surface of the vehicle-mounted electronic tag shell, and the pressure of the high-pressure gas is less than the glue injection and pressure maintaining pressure. The present application also relates to an injection method for the vehicle-mounted electronic tag shell. Compared with the prior art, the injection mold can solve the problem of bright imprinting at the clamping opening after the injection molding of the vehicle-mounted electronic tag shell.

Description

Technical Field

[0001] This invention relates to the field of automotive parts molding technology, and in particular to an injection mold and injection method for an in-vehicle electronic tag housing. Background Technology

[0002] Vehicle-mounted electronic tags are typically installed on the dashboard or windshield of a car via vehicle-mounted electronic components. These components are structural parts installed on a car to provide support, fixation, and protection for various electronic devices. They mainly include the dashboard frame, center console frame, vehicle display screen housing, navigation system bracket, housings of various control modules, and battery management system housing.

[0003] The outer casing of vehicle-mounted electronic tags is typically manufactured using injection molding; please refer to related technical documents for further details. Figure 1 and Figure 2 This invention relates to an injection mold for molding vehicle electronic tag housings. Typically, injection molds require side slides, a lower mold core punch, and an upper mold core die to form the vehicle electronic tag housing. During actual production, the inventors discovered that during the injection molding process, when holding pressure is applied, the pressure direction of the hot melt paste is perpendicular to the side slides. Since the two side slides 100' form a clamping opening 1001', if excessive injection holding pressure is applied after the hot melt paste is injected into the cavity, this pressure causes uneven bright marks (also known as wavy lines) to appear at the clamping opening of the cooled and molded vehicle electronic tag housing 200'. When the mold is opened, the movement of the side slides presses on these bright marks, resulting in an uneven outer surface of the vehicle electronic tag housing. This reduces the overall aesthetics and quality of the electronic tag housing, and such an uneven outer surface does not meet design requirements, thus limiting the overall production yield of the electronic tag housing.

[0004] Therefore, a new technical solution needs to be researched to address the above problems. Summary of the Invention

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide an injection mold for vehicle electronic tag housings. This effectively solves the technical defect in the existing technology where excessive injection pressure in the injection molds used for injection molding vehicle electronic tag housings causes bright marks at the clamping point, thereby improving the overall aesthetics and grade of the vehicle electronic tag housings and increasing the overall production yield.

[0006] To achieve the above objectives, this application provides an injection mold for a vehicle-mounted electronic tag housing, including...

[0007] The fixed mold base is provided with a middle core movable up and down and a first row position and a second row position movable forward and backward, the middle core, the first row position and the second row position can form a side shell forming cavity for injection molding the side surface of the vehicle electronic tag shell, and

[0008] The movable mold base is movably installed on the fixed mold base; the movable mold base is provided with a top shell forming cavity for injection molding the top of the vehicle electronic tag shell; when the movable mold base and the fixed mold base are closed, the top shell forming cavity can be connected with the side shell forming cavity in a through manner;

[0009] The middle core is provided with a first gas needle movable up and down, the first gas needle is connected with a gas generating device through a first gas pipe; the first gas needle is provided with a first gas outlet at the top of the side surface; the first gas outlet can inject high-pressure gas between the middle core and the inner side of the vehicle electronic tag shell, and the pressure of the high-pressure gas is less than the glue injection and pressure maintaining pressure.

[0010] The injection mold for the vehicle electronic tag shell has the beneficial effects that compared with the prior art, in the first aspect, by arranging the first gas needle on the middle core, after the hot melt paste is injected into the top shell forming cavity and the side shell forming cavity, high-pressure gas is injected between the inner side of the vehicle electronic tag shell and the middle core through the first gas outlet, the pressure of the high-pressure gas is controlled to be less than the glue injection and pressure maintaining pressure, so that when the plastic of the vehicle electronic tag shell cools and shrinks, the clamp opening bright printing at the clamp opening of the first row position and the second row position is avoided, the vehicle electronic tag shell is not scratched when the first row position and the second row position are opened subsequently, the flatness of the outer surface of the vehicle electronic tag shell is improved, and the injection molding yield is improved.

[0011] In the second aspect, by injecting high-pressure gas between the vehicle electronic tag shell and the middle core, the inner side of the vehicle electronic tag shell is separated from the middle core, and the pressure of the high-pressure gas is combined to make the cooling and shrinking speed of the outer surface of the vehicle electronic tag shell faster than the shrinking speed of the inner surface of the vehicle electronic tag shell, so that the shrinking direction of the vehicle electronic tag shell is from the outer surface to the inner surface, the outer surface of the vehicle electronic tag shell can always maintain a good appearance with flatness, the outer surface of the injection molded vehicle electronic tag shell meets the design requirement of flatness, and the injection molding yield of the vehicle electronic tag shell is further improved.

[0012] As a preferred solution, the first row position is movably installed on the fixed mold base through a first moving seat and located at the front side of the middle core; the second row position is movably installed on the fixed mold base through a second moving seat and located at the rear side of the middle core.

[0013] The front surface of the first moving seat is provided with a first abutting inclined surface inclined upward and backward from bottom to top, and the rear surface of the second moving seat is provided with a second abutting inclined surface inclined upward and forward from bottom to top.

[0014] The lower surface of the movable die seat is provided with a first abutting protrusion corresponding to the first moving seat and a second abutting protrusion corresponding to the second moving seat, the first abutting protrusion is provided with a first acting slope abutting against the first abutting slope and acting on the moving of the first moving seat, and the second abutting protrusion is provided with a second acting slope abutting against the second abutting slope and acting on the moving of the second moving seat.

[0015] As a preferred solution, the intermediate core is provided with a first connecting column extending downward, and the fixed die seat is provided with a first ejector plate movably arranged above the first connecting column and fixedly connected with the first connecting column.

[0016] When the first ejector plate moves to the first position, the intermediate core can move upward to form a side shell forming cavity with the first row position and the second row position for injection molding of the side shell of the vehicle electronic tag shell.

[0017] As a preferred solution, the first ejector plate is provided with a first stroke limiting hole penetrating through the upper and lower surfaces of the first ejector plate, and the lower surface of the first ejector plate is detachably provided with a first stroke limiting plate at the position of the first stroke limiting hole.

[0018] The fixed die seat is provided with a first stroke limiting rod above the first ejector plate, the first stroke limiting rod can be coaxially arranged with the first stroke limiting hole, and when the first ejector plate moves upward by a first distance to the first position, the bottom of the first stroke limiting rod penetrates through the first stroke limiting hole and abuts against the upper surface of the first stroke limiting plate.

[0019] As a preferred solution, the fixed die seat is provided with a first installation cavity penetrating through the upper surface of the fixed die seat, and the intermediate core is movably arranged in the first installation cavity; the fixed die seat is provided with a first avoiding through hole penetrating through the bottom of the first installation cavity upwardly and the lower surface of the fixed die seat downwardly.

[0020] The fixed die seat is detachably provided with a second stroke limiting plate at the position of the first avoiding through hole, the upper surface of the second stroke limiting plate is provided with a second stroke limiting protrusion extending into the first installation cavity upwardly through the first avoiding through hole, and the second stroke limiting plate is provided with a second avoiding through hole penetrating through the upper and lower surfaces of the second stroke limiting plate and allowing the first connecting column to penetrate through.

[0021] When the first ejector plate moves downward by a third distance from the first position to a fourth position, the bottom of the intermediate core abuts against the top of the second stroke limiting protrusion.

[0022] As a preferred solution, the intermediate core is provided with a third avoiding through hole penetrating through the upper surface of the intermediate core and the lower surface of the first connecting column.

[0023] The fixed die seat is provided with a second ejector plate above the first ejector plate, and the first gas needle is movably arranged in the third avoiding through hole and downwardly connected to the upper surface of the second ejector plate.

[0024] When the first ejector plate moves up by the first distance to the second position, the second ejector plate moves up by the first distance to the second position synchronously.

[0025] As a preferred solution, the movable die holder is provided with a glue injection port and a pump nozzle, the glue injection port is in conductive connection with the top glue injection port of the pump nozzle, the bottom glue injection port of the pump nozzle is in conductive connection with the top of the top shell forming cavity, and the first air needle is coaxially arranged with the pump nozzle;

[0026] When the second ejector plate moves up by the second distance from the second position to the third position, the top of the first air needle can seal the bottom glue injection port of the pump nozzle; when the second ejector plate moves from the second position to the third position, the first ejector plate moves down by the third distance from the first position to the fourth position, so that the inner side of the vehicle-mounted electronic tag shell and the intermediate core are spaced to form a high-pressure gas chamber, and the first air outlet is in conductive connection with the high-pressure gas chamber.

[0027] As a preferred solution, the first air needle has a hollow air channel, and the first air outlet is in conductive connection with the air channel;

[0028] The middle part of the intermediate core at the lower position is provided with a first avoiding through cavity penetrating through the left and right sides, the first air needle is provided with a first air inlet at the position of the first avoiding through cavity, one end of the first air inlet is in conductive connection with the air channel, one end of the first air pipe is in conductive connection with the other end of the first air inlet, and the other end of the first air pipe extends outward through the first avoiding through cavity and is connected to the gas generating device.

[0029] As a preferred solution, the gas generating device includes a booster, a gas storage tank connected to the booster through a pipeline, and a high-pressure gas controller connected to the gas storage tank through a pipeline, and the other end of the first air pipe is connected to the high-pressure gas controller;

[0030] The gas storage tank is provided with a pressure gauge, and the pressure gauge is connected to the high-pressure gas controller and the booster through a wired connection mode respectively.

[0031] The application also provides an injection molding method of a vehicle-mounted electronic tag shell, which is applied to an injection mold of the vehicle-mounted electronic tag shell, and the injection molding method comprises

[0032] Step 1, providing an injection molding machine, installing the fixed die holder and the movable die holder of the injection mold on the injection molding machine, and driving the movable die holder, the first ejector plate and the second ejector plate to move by the injection molding machine;

[0033] Step 2, driving the movable die holder to move to the fixed die holder to perform mold closing, and driving the first row position to move backward and the second row position to move forward by the movable die holder; at the same time, driving the first ejector plate to move up by the first distance to the first position and driving the second ejector plate to move up by the first distance to the second position synchronously with the first ejector plate;

[0034] Step 3, injecting hot melt paste into the top shell forming cavity and the side shell forming cavity by the injection molding machine;

[0035] Step 4, after the hot melt slurry injection of the top shell forming cavity and the side shell forming cavity is completed, immediately drive the second ejector pin plate to move from the second position to the third position by a second distance, and close the bottom glue outlet of the nipple;

[0036] Step 5, after waiting for 0S-3S, start the gas generating device to input high pressure gas to the first gas needle; at the same time, drive the first ejector pin plate to move from the first position to the fourth position by a third distance, so that the first gas outlet is in conductive connection with the high pressure gas chamber, and the high pressure gas chamber inputs high pressure gas and forms the vehicle electronic tag shell;

[0037] Step 6, after waiting for 2S-5S, the movable die holder and the fixed die holder are opened, the first row position is moved forward and the second row position is moved backward; after the second ejector pin plate moves from the third position to the fifth position by a fourth distance, the vehicle electronic tag shell is ejected from the lower part;

[0038] Step 7, repeat steps 2-6 to continuously injection mold the vehicle electronic tag shell.

[0039] The injection molding method of the vehicle electronic tag shell provided by the present application has the beneficial effect that, compared with the prior art, by controlling the moving positions of the intermediate core and the first gas needle, the bottom glue outlet of the nipple can be closed by the first gas needle after the hot melt slurry is injected into the top shell forming cavity and the side shell forming cavity, and the high pressure gas chamber is injected with high pressure gas to assist the cooling and forming of the vehicle electronic tag shell. Such a forming method can reasonably control the gas pressure in the high pressure gas chamber, ensure that the plastic of the vehicle electronic tag shell does not cause the clamp opening bright printing at the clamp opening of the first row position and the second row position when it is cooled and shrunk, and at the same time, the shrinkage direction of the vehicle electronic tag shell is controlled by the injected high pressure gas to shrink from the outer surface to the inner surface, so that the outer surface of the vehicle electronic tag shell can always maintain a good appearance, the outer surface of the injection molded vehicle electronic tag shell meets the design requirement of flatness, and the injection molding yield of the vehicle electronic tag shell is improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0041] Figure 1 is a schematic diagram of the cooling and shrinkage state of the vehicle electronic tag shell after injection molding in the prior art;

[0042] Figure 2This is a schematic diagram of a three-dimensional structure with a brightly printed clamp on the outer surface of the finished vehicle electronic tag shell in the prior art;

[0043] Figure 3 This is a three-dimensional structural schematic diagram of the injection mold for the vehicle-mounted electronic tag shell provided in the embodiments of this application;

[0044] Figure 4 yes Figure 3 The diagram shows the specific structure of the fixed mold base of the injection mold for the vehicle-mounted electronic tag shell;

[0045] Figure 5 yes Figure 3 The diagram shows the specific structure of the moving mold base of the injection mold for the vehicle-mounted electronic tag shell;

[0046] Figure 6 yes Figure 3 The cross-sectional view at point AA of the injection mold for the vehicle-mounted electronic tag housing shown;

[0047] Figure 7 yes Figure 6 A magnified view of part A of the injection mold for the vehicle-mounted electronic tag housing shown;

[0048] Figure 8 yes Figure 7 The diagram shows the specific structure of the vehicle-mounted electronic tag shell formed by injection molding using an injection mold.

[0049] Figure 9 yes Figure 8 The diagram shows the specific structure of the high-pressure gas chamber surrounding the vehicle-mounted electronic tag shell after the injection mold completes the injection molding of the vehicle-mounted electronic tag shell.

[0050] Figure 10 yes Figure 4 A three-dimensional structural diagram of the intermediate core of the injection mold for the vehicle-mounted electronic tag shell is shown.

[0051] Figure 11 yes Figure 3 A simplified structural diagram of the external gas generating device in the injection mold of the vehicle-mounted electronic tag housing, showing the first air needle passing through the first air tube;

[0052] Figure 12 yes Figure 3 The diagram shows a three-dimensional structure of the injection molded vehicle electronic tag housing.

[0053] The following are the labeling elements in the figure:

[0054] 100. Injection molds for vehicle-mounted electronic tag housings;

[0055] 10, fixed mold base; 101, side shell forming cavity; 11, first row position; 111, first moving seat; 112, first abutting slope; 113, first acting hole; 12, second row position; 121, second moving seat; 122, second abutting slope; 13, intermediate core; 131, first connecting column; 132, first ejector pin plate; 1321, first stroke limiting hole; 1322, first stroke limiting plate; 134, third avoiding through hole; 135, first avoiding through cavity; 14, first air needle; 141, air channel; 142, first air outlet; 143, first air inlet; 144, first air pipe; 145, second ejector pin plate; 15, first stroke limiting rod; 16, first installation cavity; 161, first avoiding through hole; 17, second stroke limiting plate; 171, second stroke limiting convex part; 172, second avoiding through hole; 18, high-pressure gas chamber;

[0056] 20, movable mold base; 201, top shell forming cavity; 202, movable mold core; 21, first abutting convex part; 211, first acting slope; 22, second abutting convex part; 221, second acting slope; 23, glue injection port; 24, nipple; 241, top glue inlet; 242, bottom glue outlet; 25, first acting rod; 26, flow distribution plate; 261, flow distribution channel;

[0057] 30, gas generating device; 31, pressure booster; 32, gas storage tank; 321, pressure gauge; 33, high-pressure gas controller;

[0058] 200, vehicle-mounted electronic tag shell; 2001, top shell; 2002, side shell; 2003, through hole position. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0061] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0062] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0063] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and examples.

[0064] Before explaining the embodiments of the present application in detail, the application scenarios of the embodiments of the present application will be described.

[0065] Please refer to Figures 1 to 2 , a schematic diagram of the existing technology of the injection molding process of the vehicle electronic tag shell exists in the pinch bright printing; the vehicle electronic tag shell is usually manufactured by using an injection mold for injection molding; for the hollow shell structure injection molding, the injection mold usually uses two horizontal positions, the lower mold core and the upper mold core to cooperate to form a cavity for injection molding the vehicle electronic tag shell, hot melt slurry is injected into the cavity, and the injection pressure is maintained for a certain time, and then the hot melt slurry is cooled to obtain the vehicle electronic tag shell. However, the inventors found in actual production that after the two horizontal positions are combined, the pinch (i.e. the combined connection between the two horizontal positions) is formed; due to the influence of the injection pressure on the hot melt slurry, the pinch bright printing of the cooled and formed vehicle electronic tag shell is caused, and when the mold is opened, the two horizontal positions move and press the pinch bright printing, resulting in uneven outer surface of the vehicle electronic tag shell, which reduces the overall appearance and grade of the electronic tag shell, and the electronic tag shell with uneven outer surface does not meet the design requirements, which limits the overall production yield of the electronic tag shell.

[0066] Please refer to Figures 3 to 12 , the injection mold 100 of the vehicle electronic tag shell provided by the embodiments of the present application will be described. The injection mold 100 of the vehicle electronic tag shell includes a fixed mold base 10 and a movable mold base 20.

[0067] The movable mold base 20 is movably installed on the fixed mold base 10, and the movable mold base 20 can be combined with the fixed mold base 10 after moving downward, and the movable mold base 20 can be opened after moving upward; the fixed mold base 10 is provided with a movable intermediate core 13 and movable first and second row positions 11 and 12, and the intermediate core 13, the first row position 11 and the second row position 12 can form a side shell forming cavity 101 for injection molding the side surface of the vehicle electronic tag shell; the movable mold base 20 is provided with a top shell forming cavity 201 for injection molding the top of the vehicle electronic tag shell; when the movable mold base 20 is combined with the fixed mold base 10, the top shell forming cavity 201 can be connected with the side shell forming cavity 101, and the hot melt slurry can be injected into the top shell forming cavity 201 and the side shell forming cavity 101, and an integrated vehicle electronic tag shell can be injection molded, that is, the top shell body 2001 and the side shell body 2002 of the vehicle electronic tag shell are integrated.

[0068] Specifically, the intermediate core 13 is provided with a first air needle 14 which is movable up and down, and the first air needle 14 is connected with the gas generating device 30 through a first air pipe 144; the first air needle 14 is provided with a first air outlet 142 at the top of the side surface, and the first air outlet 142 can inject high-pressure gas between the intermediate core 13 and the inner side of the vehicle electronic tag shell, and the pressure of the high-pressure gas is less than the glue injection and pressure maintaining pressure.

[0069] More specifically, compared with the prior art, in the first aspect, by arranging the first air needle 14 on the intermediate core 13, after the hot melt slurry is injected into the top shell forming cavity 201 and the side shell forming cavity 101, high-pressure gas is injected between the inner side of the vehicle electronic tag shell and the intermediate core 13 through the first air outlet 142, and the pressure of the high-pressure gas is controlled to be less than the glue injection and pressure maintaining pressure, so that when the plastic of the vehicle electronic tag shell cools and shrinks, the pinch bright print at the pinch opening of the first row position 11 and the second row position 12 is avoided, and the outer surface of the vehicle electronic tag shell is not scratched when the first row position 11 and the second row position 12 are opened, thereby improving the flatness of the outer surface of the vehicle electronic tag shell, and further improving the injection molding yield;

[0070] In the second aspect, by injecting high-pressure gas between the vehicle electronic tag shell and the intermediate core 13, the inner side of the vehicle electronic tag shell and the intermediate core 13 are separated, and the pressure of the high-pressure gas is combined, so that the outer surface of the vehicle electronic tag shell cools and shrinks faster than the inner surface of the vehicle electronic tag shell, thereby making the shrinkage direction of the vehicle electronic tag shell from the outer surface to the inner surface, and the outer surface of the vehicle electronic tag shell can always maintain a good appearance, so that the outer surface of the injection molded vehicle electronic tag shell meets the design requirements of flatness, and the injection molding yield of the vehicle electronic tag shell is further improved.

[0071] Please refer to Figures 3 to 5In some embodiments, the first row of positions 11 is movably mounted on the fixed die seat 10 by a first movable seat 111 and is located in front of the intermediate core 13, and the second row of positions 12 is movably mounted on the fixed die seat 10 by a second movable seat 121 and is located in back of the intermediate core 13. The front surface of the first movable seat 111 is provided with a first abutting inclined surface 112 which is inclined rearward from bottom to top, and the rear surface of the second movable seat 121 is provided with a second abutting inclined surface 122 which is inclined forward from bottom to top. The lower surface of the movable die seat 20 is provided with a first abutting protrusion 21 corresponding to the first movable seat 111 and a second abutting protrusion 22 corresponding to the second movable seat 121. The first abutting protrusion 21 is provided with a first acting inclined surface 211 which abuts against the first abutting inclined surface 112 and acts on the first movable seat 111 to move it, and the second abutting protrusion 22 is provided with a second acting inclined surface 221 which abuts against the second abutting inclined surface 122 and acts on the second movable seat 121 to move it.

[0072] Specifically, when the movable die seat 20 is lowered relative to the fixed die seat 10 to perform the clamping process, the first abutting protrusion 21 and the second abutting protrusion 22 correspondingly act on the first row of positions 11 and the second row of positions 12 to move them toward the intermediate core 13 to perform clamping to form the side shell forming cavity 101, and the side shell forming cavity 101 is connected in communication with the top shell forming cavity 201 of the movable die seat 20. After the movable die seat 20 is raised relative to the fixed die seat 10 to perform the unclamping process, the first abutting protrusion 21 and the second abutting protrusion 22 correspondingly cancel the acting force on the first row of positions 11 and the second row of positions 12, and the first row of positions 11 and the second row of positions 12 then automatically return to the original positions.

[0073] It should be noted that the movable die seat 20 is provided with a first acting rod 25 which is obliquely arranged, and the first movable seat 111 and the second movable seat 121 of the first row of positions 11 and the second row of positions 12 are provided with a first acting hole 113 which is obliquely arranged, and the first acting rod 25 can be inserted into the first acting hole 113. During the clamping process of the movable die seat 20 and the fixed die seat 10, the first acting rod 25, the first acting inclined surface 211 and the second acting inclined surface 221 can act on the first row of positions 11 and the second row of positions 12 to move them, and during the unclamping process of the movable die seat 20 and the fixed die seat 10, the first acting rod 25 can act on the first row of positions 11 and the second row of positions 12 to move them to the original positions. This way of moving the first row of positions 11 and the second row of positions 12 during the unclamping and clamping operations is a routine design means for those skilled in the art, and will not be described in detail here.

[0074] It can be understood that the lower surface of the movable die seat 20 is provided with a movable die core 202, and the top shell forming cavity 201 is recessed on the lower surface of the movable die core 202.

[0075] Please refer to Figures 6 to 10In some other embodiments, the intermediate core 13 is provided with a first connecting column 131 extending downward, and the fixed mold seat 10 is provided with a first ejector plate 132 movable up and down and fixedly connected with the first connecting column 131; when the first ejector plate 132 moves to a first position, the intermediate core 13 can move upward and form a side shell forming cavity 101 with the first row position 11 and the second row position 12 for injection molding of a side shell of a vehicle electronic tag shell.

[0076] Specifically, the first ejector plate 132 is provided with a first stroke limiting hole 1321 penetrating through upper and lower surfaces thereof, and a first stroke limiting plate 1322 is detachably installed on the lower surface of the first ejector plate 132 at a position where the first stroke limiting hole 1321 is located; the fixed mold seat 10 is provided with a first stroke limiting rod 15 above the first ejector plate 132, and the first stroke limiting rod 15 can be coaxially arranged with the first stroke limiting hole 1321; when the first ejector plate 132 moves upward by a first distance to the first position, the bottom of the first stroke limiting rod 15 penetrates through the first stroke limiting hole 1321 and abuts against the upper surface of the first stroke limiting plate 1322.

[0077] It can be understood that the stroke limiting of the first ejector plate 132 from an original position to the first position by the first distance is achieved by the mutual abutment of the first stroke limiting rod 15 and the first stroke limiting plate 1322, and such a pure mechanical limiting structure has higher controllability and reliability than a sensor control mode; moreover, the first distance stroke of the first ejector plate 132 can be changed only by changing the length of the first stroke limiting rod 15, and the convenience of changing the stroke is higher.

[0078] More specifically, the fixed mold seat 10 is provided with a first installation cavity 16 penetrating through the upper surface thereof, and the intermediate core 13 is movably arranged in the first installation cavity 16; the fixed mold seat 10 is provided with a first avoiding through hole 161 penetrating through the bottom of the first installation cavity 16 upward and the lower surface of the fixed mold seat 10 downward; the fixed mold seat 10 is detachably installed with a second stroke limiting plate 17 at a position where the first avoiding through hole 161 is located, the upper surface of the second stroke limiting plate 17 is provided with a second stroke limiting protrusion 171 extending into the first installation cavity 16 upward through the first avoiding through hole 161, and the second stroke limiting plate 17 is provided with a second avoiding through hole 172 penetrating through the upper and lower surfaces thereof and for the first connecting column 131 to penetrate through; when the first ejector plate 132 moves downward by a third distance from the first position to a fourth position, the bottom of the intermediate core 13 abuts against the top of the second stroke limiting protrusion 171.

[0079] It can be understood that the specific effect of the second stroke limiting plate 17 and the second stroke limiting protrusion 171 is the same as that of the first stroke limiting rod 15 and the first stroke limiting plate 1322, both of which are to control the movement stroke of a component, and only the second stroke limiting protrusion 171 with different heights needs to be changed to control the specific stroke of the first needle plate 132 moving downward from the first position by a third distance.

[0080] Further, the intermediate core 13 is provided with a third avoiding through hole 134 penetrating through the upper surface of the intermediate core 13 and the lower surface of the first connecting column 131; the second needle plate 145 is arranged above the first needle plate 132 on the fixed mold base 10, the first air needle 14 is movably arranged in the third avoiding through hole 134 and downwardly extends to be connected to the upper surface of the second needle plate 145; during the upward movement of the first needle plate 132 by the first distance to the second position, the second needle plate 145 is synchronously moved upward by the first distance to the second position.

[0081] In other embodiments, the movable mold base 20 is provided with a glue injection port 23 and a spout 24, the glue injection port 23 is in conductive connection with the top glue injection port 241 of the spout 24, the bottom glue injection port 242 of the spout 24 is in conductive connection with the top of the top shell forming cavity 201, and the first air needle 14 is coaxially arranged with the spout 24; after the second needle plate 145 moves upward by the second distance from the second position to the third position, the top of the first air needle 14 can close the bottom glue injection port 242 of the spout 24; after the second needle plate 145 moves from the second position to the third position, the first needle plate 132 moves downward by the third distance from the first position to the fourth position, so that the inner side of the vehicle-mounted electronic tag shell is spaced from the intermediate core 13 to form the high-pressure gas chamber 18, and the first air outlet 142 is in conductive connection with the high-pressure gas chamber 18.

[0082] It can be understood that before the first air needle 14 does not close the bottom glue injection port 242 of the spout 24, the first air outlet 142 can be closed by the intermediate core 13 to prevent the hot melt paste from flowing into the air duct 141 from the first air outlet 142; such a structure not only ensures the reliability of injecting high-pressure gas into the high-pressure gas chamber 18, but also ensures that the capacity of the hot melt paste injection can normally form the vehicle-mounted electronic tag shell. After the second needle plate 145 moves upward by the second distance from the second position to the third position, the top of the first air needle 14 can close the bottom glue injection port 242 of the spout 24, which can be used to injection mold the through hole position 2003 of the top shell in the vehicle-mounted electronic tag shell by means of the shape of the first air needle 14, and the first air needle 14 can be used as an inlay to further simplify the overall structure of the injection mold.

[0083] Specifically, the injection mold 100 of the vehicle-mounted electronic tag shell is a double-cavity injection mold, each cavity is surrounded by a middle core 13, a first row 11, a second row 12 and a top shell forming cavity 201 to form a cavity for injection molding of the vehicle-mounted electronic tag shell. The movable die holder 20 is provided with a glue injection shunt plate 26, the shunt plate 26 has a shunt channel 261, the number of spouts 24 is set according to the number of cavities, and the top glue inlet 241 of each spout 24 is connected to the shunt channel 261, and the bottom glue outlet 242 of the spout 24 is connected to the top shell forming cavity 201.

[0084] It can be understood that when the glue injection operation is performed, the hot melt paste is injected from the glue injection port 23, flows through the shunt channel 261, flows into the top glue inlet 241 of the spout 24, and is injected into the top shell forming cavity 201 and the side shell forming cavity 101 through the bottom glue outlet 242 of the spout 24.

[0085] In other embodiments, the first air needle 14 has a hollow air channel 141, and the first air outlet 142 is connected to the air channel 141; the middle part of the middle core 13 is provided with a first avoidance through cavity 135 penetrating the left and right sides, and the first air needle 14 is provided with a first air inlet 143 at the position of the first avoidance through cavity 135, one end of the first air inlet 143 is connected to the air channel 141, one end of the first air pipe 144 is connected to the other end of the first air inlet 143, and the other end of the first air pipe 144 extends outward through the first avoidance through cavity 135 and is connected to the gas generating device 30.

[0086] Specifically, the gas generating device 30 includes a booster 31, a gas storage tank 32 connected to the booster 31 by a pipeline, and a high-pressure gas controller 33 connected to the gas storage tank 32 by a pipeline, and the other end of the first air pipe 144 is connected to the high-pressure gas controller 33; the gas storage tank 32 has a pressure gauge 321, and the pressure gauge 321 is connected to the high-pressure gas controller 33 and the booster 31 by wired connection respectively.

[0087] More specifically, the high-pressure gas controller 33 can be any one of GPC series gas auxiliary pressure controller, PPCH-G high-pressure gas pressure controller / calibrator, Fluke7350 gas digital pressure controller / calibrator, SPMK251-70 high-pressure gas intelligent controller or EJS SF1 / 2 / 4 gas auxiliary main controller. Through the setting of the high-pressure gas controller 33, the high-pressure gas pressure in the high-pressure gas chamber 18 can be effectively controlled.

[0088] In other embodiments, an injection molding method of a vehicle-mounted electronic tag shell is also provided, and the injection molding method comprises the following steps:

[0089] Step 1, provide an injection molding machine, install the fixed mold base 10 and the movable mold base 20 of the injection mold on the injection molding machine, and drive the movable mold base 20, the first ejector plate 132 and the second ejector plate 145 to move by the injection molding machine;

[0090] Step 2, drive the movable mold base 20 to move towards the fixed mold base 10 to perform mold closing, and drive the first row position 11 to move backward and the second row position 12 to move forward by the movable mold base 20; at the same time, drive the first ejector plate 132 to move upward by a first distance to a first position, and drive the second ejector plate 145 to move upward by the first distance synchronously with the first ejector plate 132 to a second position;

[0091] Step 3, the injection molding machine injects hot melt material into the top shell forming cavity 201 and the side shell forming cavity 101;

[0092] Step 4, after the hot melt material in the top shell forming cavity 201 and the side shell forming cavity 101 is injected, immediately drive the second ejector plate 145 to move upward by a second distance from the second position to a third position, and close the bottom glue outlet 242 of the nipple 24;

[0093] Step 5, after waiting for 0S-3S, start the gas generating device 30 to input high-pressure gas into the first gas needle 14; at the same time, drive the first ejector plate 132 to move downward by a third distance from the first position to a fourth position, so that the first gas outlet 142 is in conductive connection with the high-pressure gas chamber 18, and the high-pressure gas chamber 18 inputs high-pressure gas and forms the vehicle electronic tag shell;

[0094] Step 6, after waiting for 2S-5S, the movable mold base 20 and the fixed mold base 10 are opened, the first row position 11 moves forward and the second row position 12 moves backward; after the second ejector plate 145 moves upward by a fourth distance from the third position to a fifth position, the vehicle electronic tag shell is ejected and discharged;

[0095] Step 7, repeat steps 2-6 to continuously injection mold the vehicle electronic tag shell.

[0096] Specifically, in step 2, the first distance of the first ejector plate 132 is 3mm, so that the distance between the top of the intermediate core 13 and the top shell forming cavity 201 is 2mm, that is, the thickness of the top shell body 2001 can be injection molded; and the side surface of the intermediate core 13 is inclined from bottom to top to the center direction, and the minimum distance between the side surface of the intermediate core 13 and the first row position 11 and the second row position 12 is 1.5mm, which can injection mold the side shell body 2002 with a minimum thickness of 1.5mm, and the bottom thickness of the side shell body 2002 is less than the top thickness.

[0097] In step 4, the second distance of the second ejector plate 145 moving upward is 2mm, so that the top of the first air needle 14 just seals the glue outlet 242 at the bottom of the spout 24, and the through hole position 2003 of the top shell 2001 can be injection molded; since the top of the first air needle 14 seals the glue outlet 242 at the bottom of the spout 24, it can effectively prevent the hot melt paste or the plastic that has not completely hardened from being pressed to the spout 24 when high-pressure gas is input, thereby improving the reliability of the injection molding operation and the molding yield of the vehicle electronic tag shell.

[0098] In step 5, after the operation in step 4 is completed, it is preferable to wait for 1S to allow the hot melt paste to flow completely and uniformly, and to have a semi-cured effect; before starting the first ejector plate 132 to move downward by a third distance, the gas generating device 30 needs to be started to input high-pressure gas to the first air needle 14; then the first ejector plate 132 is started to move downward, and the stroke of the first ejector plate 132 moving downward by the third distance is 4mm, so that the top shell 2001 and the side shell 2002 form the high-pressure gas chamber 18 with the intermediate core 13, and in the high-pressure gas chamber 18, at least the distance between the intermediate core 13 and the inner side of the fixed shell is 4mm, that is, the maximum thickness of the high-pressure gas chamber 18 is twice the maximum thickness of the vehicle electronic tag shell; during the movement of the first ejector plate 132 from the first position to the fourth position by the third distance, the intermediate core 13 gradually moves downward relative to the first air needle 14, so that the first air outlet 142 is gradually opened, and finally the first air outlet 142 is connected to the high-pressure gas chamber 18 and applies high-pressure gas with a preset pressure to the high-pressure gas chamber 18. Compared with the prior art, by sealing the glue outlet of the spout 24 and then inputting high-pressure gas, the leakage of high-pressure gas to the glue outlet of the spout 24 can be prevented, and the controllability of the pressure of the high-pressure gas is improved; moreover, by moving the intermediate core 13 to form the high-pressure gas chamber 18, it can be ensured that the high-pressure gas is only injected into the inner side of the vehicle electronic tag shell, so that the high-pressure gas is used to change the shrinkage direction of the vehicle electronic tag shell from the outside to the inside; moreover, different thicknesses of the vehicle electronic tag shell can be adapted by controlling the different distances of the intermediate core to move, and different thicknesses of the high-pressure gas chamber can be formed according to different thicknesses of the vehicle electronic tag shell, thereby improving the versatility of the injection mold.

[0099] The above is only a preferred embodiment of the present application, and only the technical principles of the present application are specifically described, and these descriptions are only for explaining the principles of the present application, and cannot be explained as limiting the protection scope of the present application in any way. Based on the explanations herein, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application, and other specific embodiments of the present application that can be conceived by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. An injection mold for a vehicle-mounted electronic tag housing, characterized in that, include The fixed mold base (10) is provided with a vertically movable intermediate core (13) and a horizontally movable first slide (11) and second slide (12). The intermediate core (13), the first slide (11), and the second slide (12) can enclose the side shell molding cavity (101) for injection molding the peripheral side of the vehicle electronic tag shell; and, The moving mold base (20) can be installed on the fixed mold base (10) in a vertically movable manner; the moving mold base (20) is provided with a top shell molding cavity (201) for injection molding the top of the vehicle electronic tag shell; when the moving mold base (20) and the fixed mold base (10) are closed, the top shell molding cavity (201) can be connected to the side shell molding cavity (101); The intermediate core (13) is provided with a first air needle (14) that can move up and down. The first air needle (14) is connected to a gas generator (30) through a first air pipe (144). The top of the peripheral side of the first air needle (14) is provided with a first air outlet (142). The first air outlet (142) can inject high-pressure gas between the intermediate core (13) and the inner side of the vehicle electronic tag shell. The pressure of the high-pressure gas is less than the injection pressure. The moving mold base (20) is provided with a glue injection port (23) and a nozzle (24). The glue injection port (23) can be connected to the top glue inlet of the nozzle (24). The bottom glue outlet of the nozzle (24) is connected to the top of the top shell molding cavity (201). The first air needle (14) is coaxially arranged with the nozzle (24). When the second ejector plate (145) moves up a second distance from the second position to the third position, the top of the first air needle (14) can seal the bottom outlet of the nozzle (24); when the second ejector plate (145) moves from the second position to the third position, the first ejector plate (132) moves down a third distance from the first position to the fourth position, so that the inner side of the vehicle electronic tag shell and the middle core (13) are separated to form a high-pressure gas chamber, and the first air outlet (142) is connected to the high-pressure gas chamber.

2. The injection mold for the vehicle-mounted electronic tag housing according to claim 1, characterized in that, The first slide (11) is movably mounted on the fixed mold base (10) via the first movable seat (111) and is located in front of the intermediate core (13); the second slide (12) is movably mounted on the fixed mold base (10) via the second movable seat (121) and is located in rear of the intermediate core (13); The front surface of the first movable seat (111) is provided with a first abutting slope (112) that is inclined from bottom to top and backward, and the rear surface of the second movable seat (121) is provided with a second abutting slope (122) that is inclined from bottom to top and forward. The lower surface of the moving mold base (20) is provided with a first abutting protrusion (21) corresponding to the first moving base (111) and a second abutting protrusion (22) corresponding to the second moving base (121). The first abutting protrusion (21) is provided with a first action slope (211) that abuts against the first abutting slope (112) and acts to move the first moving base (111). The second abutting protrusion (22) is provided with a second action slope (221) that abuts against the second abutting slope (122) and acts to move the second moving base (121).

3. The injection mold for the vehicle-mounted electronic tag housing according to claim 1 or 2, characterized in that, The bottom of the intermediate core (13) is provided with a first connecting post (131), which extends downward; the fixed mold base (10) is provided with a first ejector plate (132) that can move up and down, and the first ejector plate (132) is fixedly connected to the first connecting post (131); When the first ejector plate (132) moves to the first position, the intermediate core (13) can move upward and surround the side shell molding cavity (101) for injection molding the peripheral side of the vehicle electronic tag shell with the first row (11) and the second row (12).

4. The injection mold for the vehicle-mounted electronic tag housing according to claim 3, characterized in that, The first ejector plate (132) is provided with a first stroke limiting hole (1321) that penetrates its upper and lower surfaces. The first stroke limiting plate (1322) is detachably installed on the lower surface of the first ejector plate (132) at the location of the first stroke limiting hole (1321). The fixed mold base (10) is provided with a first stroke limiting rod (15) above the first ejector plate (132). The first stroke limiting rod (15) can be coaxially set with the first stroke limiting hole (1321). When the first ejector plate (132) moves up a first distance to the first position, the bottom of the first stroke limiting rod (15) passes through the first stroke limiting hole (1321) and abuts against the upper surface of the first stroke limiting plate (1322).

5. The injection mold for the vehicle-mounted electronic tag housing according to claim 4, characterized in that, The fixed mold base (10) is provided with a first mounting cavity (16) that penetrates its upper surface, and the intermediate core (13) is movable up and down in the first mounting cavity (16); the fixed mold base (10) is provided with a first clearance through hole (161), which penetrates the bottom of the first mounting cavity (16) upward and penetrates the lower surface of the fixed mold base (10) downward; The fixed mold base (10) is detachably mounted with a second stroke limiting plate (17) at the location of the first clearance through hole (161). The upper surface of the second stroke limiting plate (17) is provided with a second stroke limiting protrusion (171). The second stroke limiting protrusion (171) extends upward through the first clearance through hole (161) into the first mounting cavity (16). The second stroke limiting plate (17) is provided with a second clearance through hole (172) that passes through its upper and lower surfaces and allows the first connecting post (131) to pass through. When the first ejector plate (132) moves down a third distance from the first position to the fourth position, the bottom of the intermediate core (13) abuts against the top of the second stroke limiting protrusion (171).

6. The injection mold for the vehicle-mounted electronic tag housing according to claim 4 or 5, characterized in that, The intermediate core (13) is provided with a third clearance through hole (134), which penetrates the upper surface of the intermediate core (13) and the lower surface of the first connecting post (131); The fixed mold base (10) is provided with a second ejector plate (145) above the first ejector plate (132). The first air needle (14) can be moved up and down and installed in the third clearance through hole (134) and extended downward to connect to the upper surface of the second ejector plate (145). As the first ejector plate (132) moves up a first distance to the second position, the second ejector plate (145) moves up a first distance to the second position simultaneously.

7. The injection mold for the vehicle-mounted electronic tag housing according to claim 1, 2, 4, or 5, characterized in that, The first air needle (14) has a hollow air passage (141), and the first air outlet (142) is connected to the air passage (141). The middle core (13) has a first clearance cavity (135) that runs through its left and right sides at the lower middle position. The first air needle (14) has a first air inlet (143) at the location of the first clearance cavity (135). One end of the first air inlet (143) is connected to the air passage (141), and one end of the first air pipe (144) is connected to the other end of the first air inlet (143). The other end of the first air pipe (144) extends outward through the first clearance cavity (135) and is connected to the gas generating device (30).

8. The injection mold for the vehicle-mounted electronic tag housing according to claim 7, characterized in that, The gas generating device (30) includes a booster (31), a gas storage tank (32) connected to the booster (31) via a pipe, and a high-pressure gas controller (33) connected to the gas storage tank (32) via a pipe. The other end of the first gas pipe (144) is connected to the high-pressure gas controller (33). The gas storage tank (32) has a pressure gauge (321), which is connected to the high-pressure gas controller (33) and the booster (31) via wired connection.

9. A method for injection molding a vehicle-mounted electronic tag housing, applied to the injection mold of the vehicle-mounted electronic tag housing according to any one of claims 1-8, characterized in that, Injection molding methods include Step 1: Provide an injection molding machine, install the fixed mold base and the moving mold base of the injection mold on the injection molding machine, and drive the moving mold base, the first ejector plate (132) and the second ejector plate (145) to move by the injection molding machine; Step 2: Drive the moving mold base to move towards the fixed mold base to close the mold, and drive the first slide (11) to move backward and the second slide (12) to move forward; at the same time, drive the first ejector plate (132) to move upward by a first distance to the first position and drive the second ejector plate (145) to move upward by a first distance along with the first ejector plate (132) to the second position. Step 3: The injection molding machine injects the hot melt slurry into the top shell molding cavity (201) and the side shell molding cavity (101). Step 4: After the hot melt slurry in the top shell forming cavity (201) and the side shell forming cavity (101) is injected, immediately drive the second ejector plate (145) to move up a second distance from the second position to the third position and close the bottom outlet of the nozzle (24). Step 5: After waiting 0-3 seconds, start the gas generator (30) to input high-pressure gas into the first gas needle (14); at the same time, drive the first ejector plate (132) to move down from the first position by a third distance to the fourth position, so that the first gas outlet (142) is connected to the high-pressure gas chamber, so that the high-pressure gas chamber is input with high-pressure gas and forms the vehicle electronic tag shell. Step 6: After waiting for 2-5 seconds, the moving mold base and the fixed mold base open the mold, the first slide (11) moves forward and the second slide (12) moves backward; after the second ejector plate (145) moves up four distances from the third position to the fifth position, the vehicle electronic tag shell is ejected and unloaded. Step 7: Repeat steps 2-6 to continue injection molding the vehicle electronic tag shell.

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