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

Abstract

The invention relates to the technical field of automobile part forming, in particular to an injection mold for a vehicle-mounted electronic tag shell, the injection mold comprises a fixed mold base and a movable mold base, the fixed mold base is provided with a middle mold core, a first slide and a second slide, and the middle mold core, the first slide and the second slide can define a side shell forming cavity; the movable mold base is provided with a top shell forming cavity used for injection molding of the top of the vehicle-mounted electronic tag shell. The middle mold core is provided with a first gas needle capable of moving up and down, and the first gas needle is connected with a gas generating device through a first gas pipe; and a first gas outlet is formed in the top of the peripheral side face of the first gas needle and can inject high-pressure gas between the middle mold core and the inner side face of the vehicle-mounted electronic tag shell, and the pressure of the high-pressure gas is smaller than the glue injection pressure maintaining pressure. The invention further relates to an injection molding method of the vehicle-mounted electronic tag shell. Compared with the prior art, the problem that a clamping opening has bright marks after the vehicle-mounted electronic tag shell is subjected to injection molding can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts molding, in particular to an injection mold and an injection molding method for a vehicle-mounted electronic tag shell. Background Art

[0002] On-board electronic tags usually need to be installed on the hollow platform or windshield of the car through on-board electronic components. On-board electronic components refer to structural parts installed on the car to provide support, fixation and protection for various electronic devices. They mainly include instrument panel frames, center console frames, on-board display screen housings, navigation system brackets, various control module housings and battery management system housings.

[0003] For the shell of the vehicle-mounted electronic tag, it is usually made by injection molding using an injection mold; in the related technology, please refer to Figure 1 and Figure 2 The injection mold for molding an on-board electronic tag housing typically requires side runners, a lower mold core male mold, and an upper mold core female mold to form the on-board electronic tag housing. The inventor discovered during actual production operations that during the injection molding process, once the injection molding pressure is applied, the hot melt slurry is compressed perpendicularly toward the side runners. Because the side runners 100' form a clamp 1001', and after the hot melt slurry is injected into the mold cavity, if excessive injection molding pressure is applied, this injection molding pressure will cause the cooled on-board electronic tag housing 200' to produce uneven clamp marks (also known as wavy patterns) at the clamp. At this time, when the mold is opened, the movement of the side runners will press against the clamp marks, resulting in an uneven outer surface of the on-board electronic tag housing, which reduces the overall aesthetics and quality of the electronic tag housing. Furthermore, this electronic tag housing with an uneven outer surface does not meet design requirements, resulting in a limited overall production yield of the electronic tag housing.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Invention

[0005] In view of this, the present invention aims to address the shortcomings of the existing technology, and its main purpose is to provide an injection mold for a vehicle-mounted electronic tag shell, which effectively solves the technical defect in the existing technology that the injection mold used for injection molding the vehicle-mounted electronic tag shell produces a bright clamp mark at the clamp due to excessive injection holding pressure, thereby improving the overall aesthetics and grade of the vehicle-mounted electronic tag shell, and improving the overall production yield of the vehicle-mounted electronic tag shell.

[0006] To achieve the above purpose, the present application provides an injection mold for a vehicle-mounted electronic tag housing, comprising The fixed mold base is provided with an intermediate core that can move up and down and a first row and a second row that can move forward and backward. The intermediate core, the first row and the second row can enclose a side shell molding cavity for injection molding the peripheral side of the vehicle electronic tag housing; and The movable mold base is movably mounted on the fixed mold base; the movable mold base is provided with a top shell molding cavity for injection molding the top of the vehicle electronic tag housing; when the movable mold base is molded with the fixed mold base, the top shell molding cavity can be conductively connected to the side shell molding cavity; Among them, the middle core is provided with a first air needle which can move up and down, and the first air needle is connected to the gas generating device through a first air pipe; a first air outlet is provided at the top of the side surface of the first air needle, and the first air 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 injection holding pressure.

[0007] The injection mold for the vehicle-mounted electronic tag housing provided by the present application has the following advantages, compared with the prior art: firstly, by providing a first air needle in the intermediate core, after the hot melt slurry is injected into the top shell molding cavity and the side shell molding cavity, high-pressure gas is injected into the space between the inner side of the vehicle-mounted electronic tag housing and the intermediate core through the first air outlet. The pressure of the high-pressure gas is controlled to be lower than the injection holding pressure, so that when the plastic of the vehicle-mounted electronic tag housing cools and shrinks, no bright marks will be caused at the clamping joints of the first and second rows. When the first and second rows are subsequently opened, the outer surface of the vehicle-mounted electronic tag housing will not be scratched, thereby improving the flatness of the outer surface of the vehicle-mounted electronic tag housing and thereby improving the injection molding yield; Secondly, by injecting high-pressure gas between the vehicle-mounted electronic tag shell and the intermediate core, the inner side of the vehicle-mounted electronic tag shell can be separated from the intermediate core, and combined with the pressure of the high-pressure gas, the outer surface of the vehicle-mounted electronic tag shell can be cooled and contracted faster than the inner surface of the vehicle-mounted electronic tag shell, so that the shrinkage direction of the vehicle-mounted electronic tag shell is from the outer surface to the inner surface, which can make the outer surface of the vehicle-mounted electronic tag shell always maintain a smooth and good appearance, so that the outer surface of the injection-molded vehicle-mounted electronic tag shell meets the flatness required by the composite design, further improving the injection molding yield of the vehicle-mounted electronic tag shell.

[0008] As a preferred solution, the first slide is movably mounted on the fixed mold base through a first movable seat and is located in front of the middle core; the second slide is movably mounted on the fixed mold base through a second movable seat and is located behind the middle core; The front surface of the first movable seat is provided with a first abutting inclined surface inclined from bottom to top and backward, and the rear surface of the second movable seat is provided with a second abutting inclined surface inclined from bottom to top and forward; The lower surface of the movable mold seat is provided with a first abutting protrusion corresponding to the first movable seat and a second abutting protrusion corresponding to the second movable seat. The first abutting protrusion is provided with a first action inclined surface that abuts against the first abutting inclined surface and acts on the first movable seat to move. The second abutting protrusion is provided with a second action inclined surface that abuts against the second abutting inclined surface and acts on the second movable seat to move.

[0009] As a preferred solution, a first connecting column is provided at the bottom of the intermediate core, and the first connecting column extends downward; the fixed mold base is provided with a first ejector plate that can move up and down, and the first ejector plate is fixedly connected to the first connecting column; When the first ejector plate moves to the first position, the middle core can move upward and, together with the first row and the second row, form a side shell molding cavity for injection molding the peripheral side of the vehicle-mounted electronic tag housing.

[0010] As a preferred solution, the first ejector plate is provided with a first stroke limiting hole penetrating the upper and lower surfaces thereof, and a first stroke limiting plate is detachably mounted on the lower surface of the first ejector plate at the location of the first stroke limiting hole; The fixed mold base is provided with a first stroke limiting rod above the first ejector plate, and the first stroke limiting rod can be coaxially arranged with the first stroke limiting hole; when the first ejector plate moves up a first distance to a first position, the bottom of the first stroke limiting rod passes through the first stroke limiting hole and abuts against the upper surface of the first stroke limiting plate.

[0011] As a preferred solution, the fixed mold base is provided with a first mounting cavity penetrating its upper surface, and the intermediate core is movably arranged in the first mounting cavity; the fixed mold base is provided with a first avoidance through-hole, which penetrates the bottom of the first mounting cavity upward and penetrates the lower surface of the fixed mold base downward; The fixed mold base is detachably mounted with a second stroke limiting plate at the location of the first avoidance through-hole. The upper surface of the second stroke limiting plate is provided with a second stroke limiting protrusion, which extends upward through the first avoidance through-hole into the first mounting cavity. The second stroke limiting plate is provided with a second avoidance through-hole that penetrates through the upper and lower surfaces thereof and is for the first connecting column to pass through. When the first ejector plate moves downward from the first position to the fourth position by the third distance, the bottom of the middle core abuts against the top of the second stroke limiting protrusion.

[0012] As a preferred solution, the middle core is provided with a third avoidance through hole, and the third avoidance through hole passes through the upper surface of the middle core and the lower surface of the first connecting column; The fixed mold base is provided with a second ejector plate above the first ejector plate, and the first air needle is movably installed in the third avoidance through hole and extends downward to be connected to the upper surface of the second ejector plate; When the first ejector plate moves up the first distance to the second position, the second ejector plate moves up the first distance to the second position synchronously.

[0013] As a preferred solution, the movable mold base is provided with a glue injection port and a nozzle, the glue injection port can be conductively connected to the glue inlet at the top of the nozzle, the glue outlet at the bottom of the nozzle is conductively connected to the top of the top shell molding cavity, and the first air needle is coaxially arranged with the nozzle; When the second ejector plate moves up a second distance from the second position to the third position, the top of the first air needle can close the glue outlet at the bottom of the nozzle; when the second ejector plate moves from the second position to the third position, the first ejector plate moves down a third distance from the first position to the fourth position, so that the inner side of the vehicle-mounted electronic tag shell and the middle core are spaced apart to form a high-pressure gas chamber, and the first air outlet is conductively connected to the high-pressure gas chamber.

[0014] As a preferred solution, the first air needle has a hollow airway, and the first air outlet is in communication with the airway; A first avoidance cavity is provided at the lower middle portion of the intermediate core, running through the left and right sides thereof. A first air needle is provided with a first air inlet at the position of the first avoidance cavity. One end of the first air inlet is connected to the airway, one end of the first air pipe is connected to the other end of the first air inlet, and the other end of the first air pipe extends outward through the first avoidance cavity and is connected to the gas generating device.

[0015] As a preferred solution, the gas generating device includes a booster, a gas storage tank connected to the booster via a pipeline, and a high-pressure gas controller connected to the gas storage tank via a pipeline, and the other end of the first gas pipe is connected to the high-pressure gas controller; The gas storage tank has a pressure gauge, which is connected to the high-pressure gas controller and the booster through wired connections.

[0016] The present application also provides an injection molding method for a vehicle-mounted electronic tag housing, which is applied to an injection mold for the vehicle-mounted electronic tag housing. The injection molding method includes: Step 1: Provide an injection molding machine, install the fixed mold base and movable mold base of the injection mold on the injection molding machine, and use the injection molding machine to drive the movable mold base, the first ejector plate, and the second ejector plate to move; Step 2: driving the movable mold base to move toward the fixed mold base to close the mold, and the movable mold base drives the first slide to move backward and the second slide to move forward; at the same time, driving the first ejector plate to move up a first distance to a first position and the second ejector plate to move up a first distance to a second position synchronously with the first ejector plate; Step 3: The injection molding machine injects the hot melt slurry into the top shell molding cavity and the side shell molding cavity; Step 4: After the hot melt slurry is injected into the top shell molding cavity and the side shell molding cavity, the second ejector plate is immediately driven to move up the second distance from the second position to the third position, and the glue outlet at the bottom of the nozzle is closed; Step 5: After waiting for 0-3 seconds, the gas generating device is activated to input high-pressure gas to the first gas needle; at the same time, the first ejector plate is driven to move down a third distance from the first position to the fourth position, so that the first gas outlet is electrically connected to the high-pressure gas chamber, allowing the high-pressure gas chamber to input high-pressure gas and form the vehicle-mounted electronic tag housing; Step 6: After waiting for 2-5 seconds, the movable mold base and the fixed mold base open the mold, the first row moves forward and the second row moves backward; the second ejector plate moves the fourth distance from the third position to the fifth position, and the vehicle-mounted electronic tag shell is ejected and discharged; Step 7: Repeat steps 2-6 to continue injection molding the vehicle-mounted electronic tag housing.

[0017] The beneficial effect of the injection molding method of the vehicle-mounted electronic tag shell provided by the present application is that, compared with the existing technology, by controlling the moving position of the intermediate core and the first air needle, the hot melt slurry can be controlled to be injected into the top shell molding cavity and the side shell molding cavity, and the first air needle is used to close the glue outlet at the bottom of the nozzle, and high-pressure gas is injected into the high-pressure gas chamber to assist the cooling and molding of the vehicle-mounted electronic tag shell; such a molding method can reasonably control the gas pressure in the high-pressure gas chamber to ensure that when the plastic of the electronic tag shell is cooled and contracted, no bright marks will be caused at the clamps of the first and second rows; at the same time, the contraction direction of the vehicle-mounted 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-mounted electronic tag shell can always maintain a smooth and good appearance, so that the outer surface of the injection-molded vehicle-mounted electronic tag shell meets the flatness required by the composite design, thereby improving the injection molding yield of the vehicle-mounted electronic tag shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a schematic diagram of the cooling and shrinking state of the vehicle-mounted electronic tag housing after injection molding in the prior art; Figure 2 This is a schematic diagram of the three-dimensional structure of the outer surface of the finished vehicle-mounted electronic tag shell having a bright printing on the clamping edge in the prior art; Figure 3 3D schematic diagram of the injection mold for the vehicle-mounted electronic tag housing provided by an embodiment of the present application; Figure 4 yes Figure 3 The specific structural diagram of the fixed mold base of the injection mold of the vehicle-mounted electronic tag housing is shown; Figure 5 yes Figure 3 The specific structural diagram of the movable mold base of the injection mold of the vehicle-mounted electronic tag housing is shown; Figure 6 yes Figure 3 The sectional view of the injection mold of the vehicle-mounted electronic tag housing at AA is shown; Figure 7 yes Figure 6 The enlarged view of the part A of the injection mold of the vehicle electronic tag housing shown; Figure 8 yes Figure 7 The specific structural diagram of the vehicle-mounted electronic tag housing is shown as an injection mold for injection molding the vehicle-mounted electronic tag housing; Figure 9 yes Figure 8 The specific structural diagram of the high-pressure gas chamber after the injection mold of the vehicle-mounted electronic tag shell is completed; Figure 10 yes Figure 4 The schematic diagram of the three-dimensional structure of the middle core of the injection mold of the vehicle electronic tag housing is shown; Figure 11 yes Figure 3 A simplified structural diagram of the external gas generating device in which the first gas needle passes through the first gas pipe in the injection mold of the vehicle-mounted electronic tag housing shown; Figure 12 yes Figure 3 The injection mold of the vehicle-mounted electronic tag shell shown is a schematic diagram of the three-dimensional structure of the vehicle-mounted electronic tag shell injection molding.

[0020] Among them, the reference numerals in the figures are: 100. Injection mold for vehicle electronic tag housing; 10. Fixed mold base; 101. Side shell molding cavity; 11. First row; 111. First movable seat; 112. First abutting slope; 113. First action hole; 12. Second row; 121. Second movable seat; 122. Second abutting slope; 13. Intermediate core; 131. First connecting column; 132. First ejector plate; 1321. First stroke limiting hole; 1322. First stroke limiting plate; 134. Third Avoidance hole; 135, first avoidance cavity; 14, first air needle; 141, air duct; 142, first air outlet; 143, first air inlet; 144, first air pipe; 145, second ejector plate; 15, first stroke limiting rod; 16, first mounting cavity; 161, first avoidance hole; 17, second stroke limiting plate; 171, second stroke limiting protrusion; 172, second avoidance hole; 18, high-pressure gas chamber; 20. Moving mold base; 201. Top shell molding cavity; 202. Moving mold core; 21. First abutting protrusion; 211. First active slope; 22. Second abutting protrusion; 221. Second active slope; 23. Glue injection port; 24. Nozzle; 241. Top glue inlet; 242. Bottom glue outlet; 25. First active rod; 26. Diverter plate; 261. Diverter channel; 30. Gas generating device; 31. Booster; 32. Gas storage tank; 321. Pressure gauge; 33. High-pressure gas controller; 200, vehicle-mounted electronic tag housing; 2001, top housing; 2002, side housing; 2003, through-hole position. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0022] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0025] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Before explaining the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are first described.

[0027] Please also refer to Figures 1 to 2 , is a schematic diagram of the presence of a bright mark on the clamp during the injection molding process of the vehicle-mounted electronic tag shell in the prior art; the vehicle-mounted electronic tag shell is usually manufactured by injection molding using an injection mold; for the injection molding of a hollow shell structure, the injection mold usually uses two side positions, a lower mold core and an upper mold core to cooperate to form a cavity for injection molding the vehicle-mounted electronic tag shell, and hot melt slurry is injected into the cavity, and the injection and pressure are maintained for a certain period of time, and then the vehicle-mounted electronic tag shell is obtained by waiting for the hot melt slurry to cool. However, the inventors found in actual production operations that after the two side slides are closed, they will be in the clamp (that is, the place where the two side slides are merged and connected); due to the influence of the glue injection holding pressure on the hot melt slurry, the cooled and formed vehicle-mounted electronic tag shell will produce a clamp bright mark at the clamp, and when the mold is opened, the movement of the two side slides will press the clamp bright mark, resulting in an uneven outer surface of the vehicle-mounted electronic tag shell, resulting in a decrease in the overall appearance and grade of the electronic tag shell, and this electronic tag shell with an uneven outer surface does not meet the design requirements, resulting in a limited overall production yield of the electronic tag shell.

[0028] Please also refer to Figures 3 to 12 The injection mold 100 of the vehicle-mounted electronic tag housing provided in the embodiment of the present application is now described. The injection mold 100 of the vehicle-mounted electronic tag housing includes a fixed mold base 10 and a movable mold base 20 .

[0029] The movable mold base 20 can be installed on the fixed mold base 10 in a movable manner up and down. The movable mold base 20 can close the mold after moving down relative to the fixed mold base 10, and can open the mold when moving up relative to the fixed mold base 10; the fixed mold base 10 is provided with an intermediate core 13 that can move up and down and a first row position 11 and a second row position 12 that can move forward and backward. The intermediate core 13, the first row position 11 and the second row position 12 can enclose a side shell molding cavity 101 for injection molding the peripheral side of the vehicle-mounted electronic tag shell; the movable mold base 20 is provided with a top shell molding cavity 201 for injection molding the top of the vehicle-mounted electronic tag shell; when the movable mold base 20 is closed with the fixed mold base 10, the top shell molding cavity 201 can be conductively connected with the side shell molding cavity 101, and hot melt slurry can be injected into the top shell molding cavity 201 and the side shell molding cavity 101 to injection mold an integrated vehicle-mounted electronic tag shell, that is, the top shell 2001 and the side shell 2002 of the vehicle-mounted electronic tag shell are an integrated structure.

[0030] Specifically, the intermediate core 13 is provided with a first air needle 14 that can move up and down, and the first air needle 14 is connected to the gas generating device 30 through a first air pipe 144; a first air outlet 142 is provided at the top of the side surface of the first air needle 14, and the first air outlet 142 can inject high-pressure gas between the intermediate core 13 and the inner side surface of the vehicle-mounted electronic tag shell, and the pressure of the high-pressure gas is less than the injection holding pressure.

[0031] In more detail, compared with the prior art, in the first aspect, by providing the first air needle 14 in the intermediate core 13, after the hot melt slurry is injected into the top shell molding cavity 201 and the side shell molding cavity 101, high-pressure gas is injected into the space between the inner side of the vehicle-mounted electronic tag shell and the intermediate core 13 through the first air outlet 142. The high-pressure gas pressure is controlled to be lower than the injection holding pressure. When the plastic of the vehicle-mounted electronic tag shell cools and shrinks, no bright marks will be caused at the clamping joints of the first row 11 and the second row 12. When the first row 11 and the second row 12 are subsequently opened, the outer surface of the vehicle-mounted electronic tag shell will not be scratched, thereby improving the flatness of the outer surface of the vehicle-mounted electronic tag shell and thereby improving the injection molding yield. Secondly, by injecting high-pressure gas between the vehicle-mounted electronic tag shell and the intermediate core 13, the inner side of the vehicle-mounted electronic tag shell can be separated from the intermediate core 13, and combined with the pressure of the high-pressure gas, the outer surface of the vehicle-mounted electronic tag shell can be cooled and contracted faster than the inner surface of the vehicle-mounted electronic tag shell, so that the contraction direction of the vehicle-mounted electronic tag shell is from the outer surface to the inner surface, which can keep the outer surface of the vehicle-mounted electronic tag shell always smooth and good appearance, so that the outer surface of the injection-molded vehicle-mounted electronic tag shell meets the flatness required by the composite design, further improving the injection molding yield of the vehicle-mounted electronic tag shell.

[0032] Please also refer to Figures 3 to 5 In some embodiments, the first row 11 is movably mounted on the fixed mold base 10 through the first movable seat 111 and is located in front of the intermediate core 13; the second row 12 is movably mounted on the fixed mold base 10 through the second movable seat 121 and is located behind the intermediate core 13; the front surface of the first movable seat 111 is provided with a first abutting inclined surface 112 inclined from bottom to top and backward, and the rear surface of the second movable seat 121 is provided with a second abutting inclined surface 122 inclined from bottom to top and forward; the lower surface of the movable mold base 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 that abuts against the first abutting inclined surface 112 and acts on the first movable seat 111 to move, and the second abutting protrusion 22 is provided with a second acting inclined surface 221 that abuts against the second abutting inclined surface 122 and acts on the second movable seat 121 to move.

[0033] Specifically, when the movable mold base 20 moves downward relative to the fixed mold base 10 for mold closing, the first abutting protrusions 21 and the second abutting protrusions 22 act accordingly to cause the first and second slides 11 and 12 to move toward the intermediate core 13 for mold closing, thereby enclosing the side shell molding cavity 101. Furthermore, the side shell molding cavity 101 is electrically connected to the top shell molding cavity 201 of the movable mold base 20. When the movable mold base 20 is removed from the fixed mold base 10, the first and second abutting protrusions 21 and 22 cancel the forces acting on the first and second slides 11 and 12, causing the first and second slides 11 and 12 to automatically return to their original positions.

[0034] It should be noted here that the movable mold base 20 is provided with a first action rod 25 set at an angle, and the first movable seat 111 and the second movable seat 121 of the first row 11 and the second row 12 are provided with a first action hole 113 set at an angle, and the first action rod 25 can be inserted into the first action hole 113; when the movable mold base 20 and the fixed mold base 10 are in the process of closing the mold, the first action rod 25, the first action inclined surface 211, and the second action inclined surface 221 can act on the first row 11 and the second row 12 to move, and when the movable mold base 20 and the fixed mold base 10 are in the process of opening the mold, the first action rod 25 can act on the first row 11 and the second row 12 to move to their original positions; this way of moving the first row 11 and the second row 12 during mold opening and mold closing operations is a conventional design means for those skilled in the art and will not be described in detail here.

[0035] It is understandable that a movable mold core 202 is provided on the lower surface of the movable mold base 20 , and the top shell forming cavity 201 is recessed in the lower surface of the movable mold core 202 .

[0036] Please also refer to Figures 6 to 10 In other embodiments, a first connecting column 131 is provided at the bottom of the intermediate core 13, and the first connecting column 131 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 column 131; when the first ejector plate 132 moves to the first position, the intermediate core 13 can move upward and enclose the side shell molding cavity 101 for injection molding the peripheral side of the vehicle-mounted electronic tag shell with the first row position 11 and the second row position 12.

[0037] Specifically, the first ejector plate 132 is provided with a first stroke limiting hole 1321 passing through its upper and lower surfaces, and the first stroke limiting plate 1322 is detachably installed on the lower surface of the first ejector plate 132 at the position 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, 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 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.

[0038] It can be understood that the stroke limitation of the first ejector plate 132 moving the first distance from the original position to the first position is achieved by the first stroke limiting rod 15 and the first stroke limiting plate 1322 abutting against each other. This purely mechanical limiting structure is far more controllable and reliable than the sensor control method. 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, which makes it more convenient to change the stroke.

[0039] In more detail, the fixed mold base 10 is provided with a first mounting cavity 16 that passes through its upper surface, and the intermediate core 13 is movably arranged in the first mounting cavity 16 up and down; the fixed mold base 10 is provided with a first avoidance through-hole 161, and the first avoidance through-hole 161 passes through the bottom of the first mounting cavity 16 upward and passes through the lower surface of the fixed mold base 10 downward; the fixed mold base 10 is detachably installed with a second stroke limiting plate 17 at the position where the first avoidance through-hole 161 is located, and the upper surface of the second stroke limiting plate 17 is provided with a second stroke limiting protrusion 171, and the second stroke limiting protrusion 171 extends upward through the first avoidance through-hole 161 into the first mounting cavity 16, and the second stroke limiting plate 17 is provided with a second avoidance through-hole 172 that passes through its upper and lower surfaces and for the first connecting column 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.

[0040] It can be understood that the specific effects of the second stroke limiting plate 17 and the second stroke limiting protrusion 171 are the same as the specific effects of the first stroke limiting rod 15 and the first stroke limiting plate 1322. They are all for controlling the moving stroke of a component. It is only necessary to change the second stroke limiting protrusion 171 with different heights to control the specific stroke of the first ejector plate 132 moving down a third distance from the first position.

[0041] Furthermore, the intermediate core 13 is provided with a third avoidance through hole 134, which passes through the upper surface of the intermediate core 13 and the lower surface of the first connecting column 131; the fixed mold base 10 is provided with a second ejector plate 145 above the first ejector plate 132, and the first air needle 14 can be movably installed up and down in the third avoidance through hole 134 and extends downward to be connected to the upper surface of the second ejector plate 145; when the first ejector plate 132 moves up a first distance to a second position, the second ejector plate 145 synchronously moves up a first distance to the second position.

[0042] In other embodiments, the movable mold base 20 is provided with a glue injection port 23 and a nozzle 24, the glue injection port 23 can be conductively connected to the glue inlet 241 at the top of the nozzle 24, and the glue outlet 242 at the bottom of the nozzle 24 is conductively connected to the top of the top shell molding cavity 201, and 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 close the glue outlet 242 at the bottom 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-mounted electronic tag shell and the intermediate core 13 are spaced apart to form a high-pressure gas chamber 18, and the first air outlet 142 is conductively connected to the high-pressure gas chamber 18.

[0043] It is understood that before the first air needle 14 closes the glue outlet 242 at the bottom of the nozzle 24, the intermediate core 13 can be used to close the first air outlet 142, preventing the hot melt slurry from flowing into the air channel 141 from the first air outlet 142. Such a structure can not only ensure the reliability of injecting high-pressure gas into the high-pressure gas chamber 18, but also ensure that the capacity of the hot melt slurry injected is sufficient to properly mold the vehicle-mounted electronic tag housing. When the second ejector plate 145 moves a second distance from the second position to the third position, the top of the first air needle 14 can close the glue outlet 242 at the bottom of the nozzle 24. The shape of the first air needle 14 can be used to injection mold the through hole position 2003 of the top shell of the vehicle-mounted electronic tag housing. The first air needle 14 is used as an insert, which can further simplify the overall structure of the injection mold.

[0044] Specifically, the injection mold 100 for the vehicle electronic tag housing is a dual-cavity injection mold. Each cavity comprises a central core 13, a first row 11, a second row 12, and a top shell molding cavity 201, forming a cavity for molding the vehicle electronic tag housing. A glue injection manifold 26 is mounted on the movable mold base 20. This manifold 26 has a diversion channel 261. The number of nozzles 24 is determined based on the number of cavities. The top glue inlet 241 of each nozzle 24 is electrically connected to the diversion channel 261, while the bottom glue outlet 242 of each nozzle 24 is electrically connected to the top shell molding cavity 201.

[0045] It can be understood that when performing the glue injection operation, the hot melt slurry is injected from the glue injection port 23 through the injection molding machine, flows through the diversion channel 261 into the top glue inlet 241 of the nozzle 24, and is injected into the top shell molding cavity 201 and the side shell molding cavity 101 through the bottom glue outlet 242 of the nozzle 24.

[0046] In other embodiments, the first air needle 14 has a hollow air duct 141, and the first air outlet 142 is conductively connected to the air duct 141; a first avoidance cavity 135 running through the left and right sides of the intermediate core 13 is provided at the lower middle position, and the first air needle 14 is provided with a first air inlet 143 at the position of the first avoidance cavity 135, one end of the first air inlet 143 is conductively connected to the air duct 141, one end of the first air pipe 144 is conductively 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 cavity 135 and is connected to the gas generating device 30.

[0047] Specifically, the gas generating device 30 includes a booster 31, a gas storage tank 32 connected to the booster 31 through a pipeline, and a high-pressure gas controller 33 connected to the gas storage tank 32 through a pipeline. 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, and the pressure gauge 321 is connected to the high-pressure gas controller 33 and the booster 31 respectively through a wired connection.

[0048] More specifically, the high-pressure gas controller 33 can be any of the following: a GPC series gas-assisted pressure controller, a PPCH-G high-pressure gas pressure controller / calibrator, a Fluke 7350 gas digital pressure controller / calibrator, an SPMK251-70 high-pressure gas intelligent controller, or an EJS SF1 / 2 / 4 gas-assisted master controller. The high-pressure gas controller 33 effectively controls the high-pressure gas pressure within the high-pressure gas chamber 18.

[0049] In other embodiments, a method for injection molding a vehicle-mounted electronic tag housing is also provided, the injection molding method comprising the following steps: 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; Step 2: Drive the movable mold base 20 toward the fixed mold base 10 to close the mold, and the movable mold base 20 drives 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 up a first distance to the first position and the second ejector plate 145 to move up the first distance to the second position synchronously with the first ejector plate 132; 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 is injected into the top shell molding cavity 201 and the side shell molding cavity 101, the second ejector plate 145 is immediately driven to move up a second distance from the second position to the third position, and the glue outlet 242 at the bottom of the nozzle 24 is closed; Step 5: After waiting for 0-3 seconds, the gas generating device 30 is activated to input high-pressure gas to the first gas needle 14; at the same time, the first ejector plate 132 is driven downward by a third distance from the first position to the fourth position, so that the first gas outlet 142 is electrically connected to the high-pressure gas chamber 18, allowing the high-pressure gas chamber 18 to input high-pressure gas and form the vehicle-mounted electronic tag housing; Step 6: After waiting for 2s-5s, the movable mold base 20 and the fixed mold base 10 open the mold, the first slide 11 moves forward and the second slide 12 moves backward; the second ejector plate 145 moves a fourth distance from the third position to the fifth position, and ejects the vehicle-mounted electronic tag housing; Step 7: Repeat steps 2-6 to continue injection molding the vehicle-mounted electronic tag housing.

[0050] Specifically, in step 2, the first ejector plate 132 moves up a first distance by 3 mm from the initial position, so that the distance between the top of the intermediate core 13 and the top shell molding cavity 201 is 2 mm, that is, the top shell 2001 with a thickness of 2 mm can be injection molded; and the side surfaces of the intermediate core 13 are inclined from bottom to top toward the center, and the minimum distance between the side surfaces of the intermediate core 13 and the first row 11 and the second row 12 is 1.5 mm, so the side shell 2002 with a minimum side wall thickness of 1.5 mm can be injection molded, and the bottom thickness of the side shell 2002 is less than the top thickness.

[0051] In step 4, the second ejector plate 145 moves up a second distance of 2 mm, so that the top of the first air needle 14 just closes the glue outlet 242 at the bottom of the nozzle 24, and can injection mold the through hole position 2003 of the top shell body 2001; because the top of the first air needle 14 closes the glue outlet 242 at the bottom of the nozzle 24, it can effectively prevent the hot melt slurry or incompletely hardened plastic from being pressed toward the nozzle 24 due to the pressure of the high-pressure gas when high-pressure gas is input, thereby improving the reliability of the injection molding operation and the molding yield of the vehicle-mounted electronic tag shell.

[0052] In step 5, after completing step 4, it is preferred to wait for 1 second to allow the hot melt slurry to flow evenly and to achieve a semi-solidified effect; before starting the first ejector plate 132 to move down the third distance, it is necessary to start the gas generating device 30 to input high-pressure gas to the first gas needle 14; then start the first ejector plate 132 to move down, and the stroke of the first ejector plate 132 moving down the third distance is 4 mm, so that the top shell 2001 and the side shell 2002 and the middle core 13 form a high-pressure gas chamber 18, and the high-pressure gas chamber 18 is formed. 8, at least the distance between the intermediate core 13 and the inner side of the fixed shell is 4 mm, that is, the maximum thickness of the high-pressure gas chamber 18 is twice the maximum thickness of the vehicle-mounted electronic tag shell; during the process of the first ejector plate 132 moving down the third distance from the first position to the fourth position, the intermediate core 13 gradually moves down relative to the first gas needle 14, so that the first gas outlet 142 is gradually opened, and finally the first gas outlet 142 is connected to the high-pressure gas chamber 18, and high-pressure gas of a preset pressure is applied to the high-pressure gas chamber 18. Compared with the prior art, by closing the nozzle 24 outlet and then inputting high-pressure gas, it is possible to prevent the high-pressure gas from leaking to the nozzle 24 outlet, thereby improving the pressure controllability of the high-pressure gas; moreover, by moving the intermediate core 13 downward to enclose the high-pressure gas chamber 18, it is possible to ensure that the high-pressure gas can only be injected into the inner side of the vehicle-mounted electronic tag shell, thereby using the high-pressure gas to change the shrinkage direction of the vehicle-mounted electronic tag shell from the outside to the inside; moreover, by controlling the different distances of movement of the intermediate core, it is possible to adapt to the injection molding of vehicle-mounted electronic tag shells of different thicknesses, and to enclose high-pressure gas chambers of different thicknesses according to the different thicknesses of the vehicle-mounted electronic tag shells, thereby improving the versatility of the injection mold.

[0053] The above is merely a preferred embodiment of the present invention and specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.

Claims

1. An injection mold for a vehicle-mounted electronic tag housing, characterized in that: include A fixed mold base (10) is provided with an intermediate core (13) that can move up and down, and a first row position (11) and a second row position (12) that can move forward and backward. The intermediate core (13), the first row position (11) and the second row position (12) can enclose a side shell molding cavity (101) for injection molding the peripheral side of the vehicle-mounted electronic tag housing; and The movable mold base (20) is movably mounted on the fixed mold base (10) up and down; the movable mold base (20) is provided with a top shell molding cavity (201) for injection molding the top of the vehicle-mounted electronic tag housing; when the movable mold base (20) and the fixed mold base (10) are molded together, the top shell molding cavity (201) can be conductively connected to the side shell molding cavity (101); The intermediate core (13) is provided with a first gas needle (14) that can move up and down, and the first gas needle (14) is connected to the gas generating device (30) through a first gas pipe (144); a first gas outlet (142) is provided at the top of the side surface of the first gas needle (14), and the first gas outlet (142) can inject high-pressure gas between the intermediate core (13) and the inner side surface of the vehicle-mounted electronic tag shell, and the pressure of the high-pressure gas is less than the injection holding pressure.

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

3. The injection mold for the vehicle-mounted electronic tag housing according to claim 1 or 2, characterized in that: A first connecting column (131) is provided at the bottom of the middle core (13), and the first connecting column (131) 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 column (131); When the first ejector plate (132) moves to the first position, the intermediate core (13) can move upward and, together with the first row (11) and the second row (12), form a side shell molding cavity (101) for injection molding the peripheral side of the vehicle-mounted electronic tag housing.

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) penetrating the upper and lower surfaces thereof, and a first stroke limiting plate (1322) is detachably mounted 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), 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 a 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) penetrating the upper surface thereof, and the intermediate core (13) is movably arranged in the first mounting cavity (16) up and down; the fixed mold base (10) is provided with a first avoidance through hole (161), and the first avoidance through hole (161) 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 avoidance through hole (161); a second stroke limiting protrusion (171) is provided on the upper surface of the second stroke limiting plate (17); the second stroke limiting protrusion (171) extends upward through the first avoidance through hole (161) into the first mounting cavity (16); and the second stroke limiting plate (17) is provided with a second avoidance through hole (172) penetrating the upper and lower surfaces thereof and for the first connecting column (131) to pass through. When the first ejector plate (132) moves downward 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 middle core (13) is provided with a third avoidance through hole (134), and the third avoidance through hole (134) passes through the upper surface of the middle core (13) and the lower surface of the first connecting column (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) is movably mounted on the third avoidance through hole (134) and extends downward to be connected to the upper surface of the second ejector plate (145); When the first ejector plate (132) moves upward by the first distance to the second position, the second ejector plate (145) simultaneously moves upward by the first distance to the second position.

7. The injection mold for the vehicle-mounted electronic tag housing according to claim 6, characterized in that: The movable mold base (20) is provided with a glue injection port (23) and a nozzle (24), the glue injection port (23) can be conductively connected to the glue inlet at the top of the nozzle (24), and the glue outlet at the bottom of the nozzle (24) is conductively connected to the top of the top shell molding cavity (201), and 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 close the glue outlet at the bottom 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 a high-pressure gas chamber is set up between the inner side of the vehicle-mounted electronic tag shell and the middle core (13), and the first air outlet (142) is connected to the high-pressure gas chamber.

8. The injection mold for the vehicle-mounted electronic tag housing according to claim 1, 2, 4, 5, or 7, characterized in that: The first air needle (14) has a hollow air channel (141), and the first air outlet (142) is in conductive connection with the air channel (141); A first avoidance cavity (135) is provided at a lower middle position of the intermediate core (13) and passes through the left and right sides thereof. The first air needle (14) is provided with a first air inlet (143) at the position where the first avoidance cavity (135) is located. One end of the first air inlet (143) is conductively connected to the airway (141), one end of the first air pipe (144) is conductively 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 cavity (135) and is connected to the gas generating device (30).

9. The injection mold for the vehicle-mounted electronic tag housing according to claim 8, characterized in that: The gas generating device (30) includes a booster (31), a gas storage tank (32) connected to the booster (31) via a pipeline, and a high-pressure gas controller (33) connected to the gas storage tank (32) via a pipeline, and 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), and the pressure gauge (321) is connected to the high-pressure gas controller (33) and the booster (31) respectively through a wired connection.

10. 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 to 9, characterized in that: Injection molding methods include Step 1, providing an injection molding machine, installing the fixed mold base and the movable mold base of the injection mold on the injection molding machine, and driving the movable mold base, the first ejector plate (132) and the second ejector plate (145) to move by the injection molding machine; Step 2, driving the movable mold base to move toward the fixed mold base to close the mold, and the movable mold base drives the first row (11) to move backward and the second row (12) to move forward; at the same time, driving the first ejector plate (132) to move up a first distance to a first position and the second ejector plate (145) to move up a first distance to a second position synchronously with the first ejector plate (132); 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 is injected into the top shell molding cavity (201) and the side shell molding cavity (101), the second ejector plate (145) is immediately driven to move up a second distance from the second position to the third position, and the bottom glue outlet of the nozzle (24) is closed; Step 5, after waiting for 0s-3s, start the gas generating device (30) to input high-pressure gas to the first gas needle (14); at the same time, drive the first ejector plate (132) to move down a third distance from the first position to the fourth position, so that the first gas outlet (142) is connected to the high-pressure gas chamber, allowing the high-pressure gas chamber to input high-pressure gas and form the vehicle-mounted electronic tag housing; Step 6, after waiting for 2S-5S, the movable mold base and the fixed mold base are opened, the first row position (11) moves forward and the second row position (12) moves backward; the second ejector plate (145) moves the fourth distance from the third position to the fifth position, and then ejects the vehicle electronic tag housing; Step 7: Repeat steps 2-6 to continue injection molding the vehicle-mounted electronic tag housing.

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