Injection mold and injection molding method for automobile charging gun shell
By setting injection notches and runners in the injection mold, the runner is concealed inside the housing, solving the problems of low production efficiency and yield of existing molds, and achieving more efficient and smoother production of charging gun housings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-25
- Publication Date
- 2026-03-27
AI Technical Summary
Existing injection molds for automotive charging gun housings suffer from low production efficiency and low yield, mainly because the runner adhesive adheres to the outer surface of the housing and needs to be manually scraped off, which can easily lead to damage to the housing.
Design an injection mold that incorporates injection notches and flow channels within the molding section of the cavity, allowing the flow channel adhesive to be concealed inside the housing and appear only on the side of the housing body facing the handle cavity. This simplifies post-processing and reduces the risk of damage.
It improves production efficiency and yield, ensures a smooth shell surface free of runner adhesive residue, reduces operational complexity and time costs, and minimizes the risk of shell damage.
Smart Images
Figure CN121733763A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of injection mold technology, and in particular to an injection mold and injection method for an automotive charging gun housing. Background Technology
[0002] Injection mold technology occupies a crucial position in today's manufacturing industry and has broad prospects. With the booming development of numerous industries such as automobiles, electronics, medical devices, and home appliances, the demand for plastic products continues to rise, bringing unprecedented opportunities to injection mold technology. A charging gun is a tool used to charge new energy vehicles. To facilitate operation, it is designed in a gun-like shape. The outer shell of the charging gun is usually made of plastic; therefore, injection molds are needed to process the outer shell of the charging gun.
[0003] In related technologies, automotive charging gun housings generally consist of a main body and a handle integrally molded into the main body. The inventors discovered in actual production operations that current injection molds used for injection molding automotive charging gun housings, limited by design flaws in the injection channels, require multiple injection molding cavities to form the housing. These channels generate runner adhesive, which adheres to the outer surface of the charging gun housing and subsequently needs to be scraped off by workers using a scraper. However, manually scraping off the runner adhesive has drawbacks: firstly, it results in low production efficiency; secondly, because the runner adhesive adheres to the outer surface of the charging gun housing, over-cutting during scraping can scratch the surface, leading to damage or scrapping of the charging gun housing, thus limiting production yield.
[0004] Therefore, it is necessary to research a new technical solution to address the above problems. Summary of the Invention
[0005] In view of this, the present invention addresses the deficiencies of the prior art, and its main objective is to provide an injection mold for an automotive charging gun housing, effectively solving the technical defects of low production efficiency and low production yield in the existing injection molds used for injection molding automotive charging gun housings.
[0006] The injection mold for the car charging gun housing provided by the present invention includes... The lower template is provided with a lower mold core, and the lower mold core has a recessed cavity; The upper mold plate is provided with an upper mold core, which has an upper concave cavity; when the upper mold plate moves down relative to the lower mold plate to close the mold, the lower concave cavity and the upper concave cavity can form a molding chamber for injection molding the charging gun housing; The lower and upper concave cavities are provided with an in-cavity molding section, which is used to injection mold the handle passage of the charging gun housing; the lower template is movably provided with a first slide and a second slide, which can extend into the molding cavity to cooperate with the in-cavity molding section to form a first molding cavity for injection molding the main body of the housing and a second molding cavity for injection molding the handle of the housing; the in-cavity molding section has an injection notch on the side facing the first molding cavity, and the upper template has an injection port and an injection channel; one end of the injection channel is connected to the injection port, and the other end is connected to the injection notch.
[0007] The beneficial effects of the injection mold for the car charging gun housing provided by the present invention are as follows: Compared with the prior art, firstly, by setting an in-cavity molding part and setting an injection notch at one end of the in-cavity molding part facing the first molding cavity, when hot melt slurry is injected, the hot melt slurry can be injected into the first molding cavity through the injection port and injection channel from the injection notch. After the hot melt slurry solidifies and forms the charging gun housing, there is only channel glue on the side of the housing body facing the handle cavity. The channel glue is located in a hidden position on the inner side, thereby ensuring that there is no channel glue on the surface of the housing body and the housing handle, improving the integrity and smoothness of the appearance. Secondly, since there is only one flow channel adhesive on the side of the housing body facing the handle cavity, the operator only needs to handle one flow channel adhesive, which can greatly reduce the post-processing steps, reduce the complexity of operation and time costs, and significantly reduce the damage to the charging gun housing caused by careless handling of the flow channel adhesive (such as scratches, cuts and overcuts), thereby effectively improving the production yield and production efficiency.
[0008] As a preferred embodiment, the intracavity forming part includes A lower forming protrusion is provided in the lower recess and extends upward; and, The upper forming protrusion is located in the upper concave cavity and extends downward; The upper surface of the lower forming protrusion and the lower surface of the upper forming protrusion are both horizontal planes. When the upper mold plate closes relative to the lower mold plate, the upper forming protrusion abuts against the lower forming protrusion and forms the first forming cavity and the second forming cavity.
[0009] As a preferred embodiment, the injection notch includes a lower notch located on the upper surface of the lower molding protrusion and connected to the first molding cavity, and an upper notch located on the lower surface of the upper molding protrusion and connected to the first molding cavity. The upper surface of the lower molding protrusion is provided with a glue injection clearance notch that connects to the lower notch, and the other end of the glue injection channel penetrates the lower surface of the upper molding protrusion; when the upper mold plate moves down relative to the lower mold plate and closes the mold, the other end of the glue injection channel is connected to the glue injection clearance notch.
[0010] As a preferred embodiment, the lower template is provided with a first ejector plate, the first ejector plate is provided with a glue injection control insert, and the glue injection control insert extends upward to the lower notch; When the first ejector plate moves up, it can be linked to the glue injection to control the top of the insert to protrude upwards from the lower notch; when the first ejector plate moves down, it can be linked to the glue injection to control the top of the insert to retract downwards.
[0011] As a preferred embodiment, the first moving position has a first movable seat, and the first movable seat is connected to a first hydraulic cylinder; the second moving position has a second movable seat, and the second movable seat is connected to a second hydraulic cylinder. Before the upper and lower mold plates are closed, the first hydraulic cylinder can move the first moving seat along the first axis, so that the first slide can extend into the molding cavity; the second hydraulic cylinder can move the second moving seat along the first axis, so that the second slide can extend into the molding cavity; the extension direction of the first axis is different from the extension direction of the second axis.
[0012] As a preferred embodiment, the first sliding position is detachably installed on the first movable base, and the first sliding position includes a first main body forming part and a first handle forming part; the second sliding position is detachably installed on the second movable base, and the second sliding position includes a second main body forming part and a second handle forming part; The first body molding part and the second body molding part can extend into the first molding cavity to injection mold the body of the housing, and the first handle molding part and the second handle molding part extend into the second molding cavity to injection mold the handle of the housing.
[0013] As a preferred embodiment, the first body forming part has a first abutting inclined surface, and the second body forming part has a second abutting inclined surface. Both the first abutting inclined surface and the second abutting inclined surface are inclined along the extension direction of the third axis. The first abutting inclined surface is provided with a first locking protrusion, and the second abutting inclined surface is provided with a first locking groove; when the first body forming part and the second body forming part are able to extend into the first forming cavity, the first locking protrusion is inserted into the first locking groove.
[0014] As a preferred embodiment, the hot melt slurry is defined as being injected into the first molding cavity from the injection notch along the fourth axis, and the fourth axis and the third axis form a first included angle, the angle of which is between 15 degrees and 85 degrees.
[0015] As a preferred embodiment, the lower cavity is provided with multiple lower molding ribs on the side opposite to the injection notch, each of which extends upward; the upper cavity is provided with multiple upper molding ribs on the side opposite to the injection notch, each of which extends downward. After the upper mold core and the lower mold core are closed, multiple lower forming ribs can abut against multiple upper forming ribs and injection mold the groove-type reinforcing ribs of the shell body. The lower forming rib is provided with an ejector pin clearance hole, which penetrates downward through the lower surface of the lower mold core; the lower mold plate is provided with a second ejector plate, which is provided with an ejector pin, which can extend upward into the ejector pin clearance hole and move up and down on the second ejector plate to protrude or retract from the upper surface of the lower forming rib.
[0016] This invention also provides an injection molding method for an automotive charging gun housing, and an injection mold for the automotive charging gun housing; wherein, the injection molding method includes... Step 1: Provide an injection mold for the car charging gun housing. Assemble the lower and upper mold plates on the injection molding machine and set the upper and lower mold plates opposite each other. Drive the upper mold plate to move down relative to the lower mold plate to close the mold or move up relative to the lower mold plate to demold through the ejector pin system of the injection molding machine. Step 2: Before the upper and lower mold plates are closed, the first and second hydraulic cylinders operate simultaneously; the first hydraulic cylinder drives the first slide to move to the right along the first axis, and the second hydraulic cylinder drives the second slide to move backward and diagonally to the left along the second axis; causing the first and second body forming parts to enter the first forming cavity, and the first locking protrusion to insert into the first locking groove; the first and second handle forming parts enter the second forming cavity. Step 3: The ejector system moves the upper mold plate downward relative to the lower mold plate to close the mold. Step 4: The push rod system moves the first push pin plate downward, causing the glue injection control insert to retract downward from the surface of the lower notch, thereby increasing the cross-sectional area of the glue injection notch; Step 5: The hot melt plastic slurry is injected from the injection port through the extrusion system, flows through the injection channel and the injection clearance notch, and is then injected into the first molding cavity through the injection notch. Step 6: The ejector system moves the first ejector plate upward, causing the glue injection control insert to protrude upward from the lower notch, reducing the cross-sectional area of the glue injection notch; Step 7: After the hot melt slurry is injected, let it stand for 30 to 60 seconds to cool and solidify the hot melt slurry in the molding cavity to form the charging gun housing; Step 8: The ejection system moves the upper mold base upward to open the mold, so that the upper cavity, upper forming protrusion and upper forming rib are demolded from the charging gun housing. Step 9: The first hydraulic cylinder and the second hydraulic cylinder work simultaneously; wherein, the first hydraulic cylinder drives the first slide to move to the left along the first axis, and the second hydraulic cylinder drives the second slide to move forward and to the right along the second axis; causing the first body forming part and the second body forming part to exit the first forming cavity and be demolded from the shell body, and the first handle forming part and the second handle forming part to exit the second forming cavity and be demolded from the shell handle. Step 10: The ejection system moves the second ejector plate and the first ejector plate upwards in tandem, causing the ejector pin to protrude upwards from the lower forming rib to abut against the groove-type reinforcing rib and demold the charging gun housing from the lower cavity and the lower forming rib and unload it. Step 11: Repeat steps 2-10 to continue injection molding and eject the charging gun housing.
[0017] The beneficial effects of the injection molding method for the car charger housing provided by the present invention are as follows: Compared with the prior art, after the upper mold plate moves upward relative to the lower mold plate to open the mold, the first slide is driven by the first hydraulic cylinder and the second slide is driven by the second hydraulic cylinder to complete the demolding with the charger housing; finally, the ejector pin is used to protrude upward from the lower forming rib to abut against the groove-type reinforcing rib and demold the charger housing from the lower cavity and the lower forming rib. With this structure, when the charger housing is ejected and unloaded, it is not necessary to eject the surface of the housing body and the housing handle, which can effectively avoid the appearance defects of whitening, stress whitening and shrinkage marks on the surface of the housing body and the housing handle, eliminate ejector pin marks and ensure that the surface of the charger housing is smoother and flatter, which is conducive to subsequent spraying or achieving a high gloss surface. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional structural schematic diagram of the injection mold for the car charging gun housing provided in the embodiments of this application; Figure 2 yes Figure 1 The diagram shows the specific structure of the lower mold plate of the injection mold for the car charging gun housing; Figure 3 yes Figure 1 A schematic diagram of the upper template of the injection mold for the car charging gun housing is shown. Figure 4 yes Figure 2 A top view of the lower mold plate of the injection mold for the car charging gun housing shown; Figure 5 yes Figure 4 A magnified view of part A of the lower mold plate of the injection mold for the car charging gun housing shown; Figure 6 yes Figure 2 A partial three-dimensional structural diagram of the lower mold plate of the injection mold for the car charging gun housing is shown. Figure 7 yes Figure 6 The diagram shows the state of the first and second rows of the lower mold plate of the injection mold for the car charging gun housing exiting the molding chamber. Figure 8 yes Figure 6 The diagram shows a three-dimensional structural schematic of the first and second rows of the lower mold plate of the injection mold for the car charging gun housing. Figure 9 yes Figure 4 The image shows a cross-sectional view at point AA of the lower mold plate of the injection mold for the car charging gun housing. Figure 10 yes Figure 8 An exploded three-dimensional view of the first and second rows of the lower mold plate of the injection mold for the car charging gun housing. Figure 11 yes Figure 10 An exploded three-dimensional view of the first and second rows of the lower mold plate of the injection mold for the car charging gun housing from another angle; Figure 12 yes Figure 1 The diagram shows a three-dimensional structure of the charging gun housing formed by injection molding.
[0020] The following are the labeling elements in the figure: 100. Injection mold for car charger housing; 10. Lower mold plate; 11. Lower mold core; 111. Lower cavity; 112. Lower forming rib; 113. Ejector pin clearance hole; 12. Lower forming protrusion; 121. Lower notch; 122. Inlet clearance notch; 13. First ejector plate; 131. Inlet control insert; 14. First slide; 141. First moving seat; 1411. First insertion interface; 142. First hydraulic cylinder; 143. First body forming part; 1431. First abutting inclined surface; 1432. First locking protrusion; 1433. First groove; 1434. Rib forming groove; 1435. Rib insert; 144. First handle forming part Part; 1441, First forming slope; 145, First insertion square post; 15, Second sliding position; 151, Second moving seat; 1511, Second insertion interface; 1512, Third insertion interface; 152, Second hydraulic cylinder; 153, Second main body forming part; 1531, Second abutting slope; 1532, First locking groove; 1533, Second locking protrusion; 154, Second handle forming part; 1541, Second forming slope; 155, Second insertion square post; 156, Third insertion square post; 16, Second ejector plate; 161, Ejector pin; 17, Third sliding position; 171, Third forming protrusion; 20. Upper mold plate; 21. Upper mold core; 211. Upper cavity; 212. Upper molding rib; 22. Upper molding protrusion; 221. Upper notch; 23. Injection port; 24. Injection channel; 30. Molding chamber; 31. First molding cavity; 32. Second molding cavity; r1, first axis; r2, second axis; r3, third axis; r4, fourth axis; a1, first included angle; a2, second included angle; 200. Charging gun housing; 2001. Housing body; 2002. Housing handle; 2003. Handle cavity; 2004. Groove reinforcing rib. Detailed Implementation
[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0026] Please refer to the following: Figures 1 to 12 The injection mold 100 for the car charging gun housing provided in this application embodiment will now be described. The injection mold 100 for the car charging gun housing includes a lower mold plate 10 and an upper mold plate 20.
[0027] The lower mold plate 10 is provided with a lower mold core 11, which has a lower cavity 111; the upper mold plate 20 is provided with an upper mold core 21, which has an upper cavity 211; when the upper mold plate 20 moves down relative to the lower mold plate 10 to close the mold, the lower cavity 111 and the upper cavity 211 can form a molding chamber 30 for injection molding the charging gun housing 200. The lower cavity 111 and the upper cavity 211 are provided with an in-cavity molding part, which is used to injection mold the handle passage cavity 2003 of the charging gun housing 200; the lower template 10 is movably provided with a first slide 14 and a second slide 15, which can extend into the molding chamber 30 to cooperate with the in-cavity molding part to form a first molding cavity 31 for injection molding the housing body 2001 and a second molding cavity 32 for injection molding the housing handle 2002; the in-cavity molding part is provided with a glue injection notch on the side facing the first molding cavity 31, and the upper template 20 is provided with a glue injection port 23 and a glue injection channel 24; one end of the glue injection channel 24 is connected to the glue injection port 23, and the other end is connected to the glue injection notch.
[0028] Specifically, in the first aspect, by setting an in-cavity molding part and setting an injection notch at one end of the in-cavity molding part facing the first molding cavity 31, when hot melt slurry is injected, the hot melt slurry can be injected into the first molding cavity 31 through the injection port 23 and the injection channel 24. After the hot melt slurry solidifies and forms the charging gun housing 200, there is only channel adhesive on the side of the housing body 2001 facing the handle cavity 2003. The channel adhesive is located in a hidden position on the inside, thereby ensuring that there is no channel adhesive on the surface of the housing body 2001 and the housing handle 2002, improving the integrity and smoothness of the appearance. Secondly, since there is only one flow channel adhesive on the side of the housing body 2001 facing the handle cavity 2003, the operator only needs to handle one flow channel adhesive, which can greatly reduce the post-processing steps, reduce the complexity of operation and time cost, and significantly reduce the damage to the charging gun housing 200 caused by careless handling of the flow channel adhesive (such as scratches, cuts and overcuts), thereby effectively improving the production yield and production efficiency.
[0029] Please refer to the following: Figures 1 to 5 In some embodiments, the cavity forming portion includes a lower forming protrusion 12 and an upper forming protrusion 22; the lower forming protrusion 12 is disposed in the lower recess 111 and extends upward, and the upper forming protrusion 22 is disposed in the upper recess 211 and extends downward. The upper surface of the lower forming protrusion 12 and the lower surface of the upper forming protrusion 22 are both horizontal planes. When the upper mold plate 20 is closed relative to the lower mold plate 10, the upper forming protrusion 22 abuts against the lower forming protrusion 12 and encloses the first forming cavity 31 and the second forming cavity 32.
[0030] It is understandable that when the upper mold plate 20 and the lower mold plate 10 are closed, the lower molding protrusion 12 can abut against the upper molding protrusion 22 to injection mold the handle cavity 2003; and the lower molding protrusion 12 and the upper molding protrusion 22 separate the first molding cavity 31 and the second molding cavity 32, the shell body 2001 is formed through the first molding cavity 31, and the shell handle 2002 is formed through the second molding cavity 32.
[0031] Specifically, the injection notch includes a lower notch 121 located on the upper surface of the lower molding protrusion 12 and connected to the first molding cavity 31, and an upper notch 221 located on the lower surface of the upper molding protrusion 22 and connected to the first molding cavity 31; the upper surface of the lower molding protrusion 12 is provided with an injection clearance notch 122 that is connected to the lower notch 121, and the other end of the injection channel 24 penetrates the lower surface of the upper molding protrusion 22; when the upper mold plate 20 moves down relative to the lower mold plate 10 and the mold is closed, the other end of the injection channel 24 is connected to the injection clearance notch 122.
[0032] It should be noted that after the hot melt slurry is injected from the injection port 23, it enters the injection clearance port through the injection channel 24, and flows through the injection notch toward the first molding cavity 31 and into the second molding cavity 32; the upper notch 221 and the lower notch 121 surround the injection notch.
[0033] More specifically, the lower mold plate 10 is provided with a first ejector plate 13, and the first ejector plate 13 is provided with a glue injection control insert 131, which extends upward to the lower notch 121. When the first ejector plate 13 moves upward, it can cause the top of the glue injection control insert 131 to protrude upward from the lower notch 121. When the first ejector plate 13 moves downward, it can cause the top of the glue injection control insert 131 to retract downward. With this structure, during the injection of hot melt slurry, the first ejector plate 13 can drive the glue injection control insert 131 to move downward, causing it to retract downward from the lower notch 121, thereby expanding the cross-sectional area of the injection notch, ensuring that the hot melt slurry can be injected into the first molding cavity 31 quickly and under high pressure, reducing the possibility of hot melt slurry jamming, and thus improving the reliability and efficiency of hot melt slurry injection.
[0034] Please refer to the following: Figures 2 to 11In other embodiments, the first slide 14 has a first movable seat 141, which is connected to a first hydraulic cylinder 142; the second slide 15 has a second movable seat 151, which is connected to a second hydraulic cylinder 152; before the upper mold plate 20 and the lower mold plate 10 are closed, the first hydraulic cylinder 142 can move the first movable seat 141 along the first axis r1, so that the first slide 14 extends into the molding chamber 30; the second hydraulic cylinder 152 can move the second movable seat 151 along the first axis r1, so that the second slide 15 extends into the molding chamber 30; the extension direction of the first axis r1 is different from the extension direction of the second axis r2.
[0035] Specifically, by setting a first movable seat 141 that moves along the first axis r1 and a second movable seat 151 that moves along the second axis r2, a second included angle is formed between the first axis r1 and the second axis r2, which is between 45 degrees and 75 degrees. With this structure, the first movable seat 141 moves into the molding chamber 30 in conjunction with the first moving position 14, and the second movable seat 151 moves into the molding chamber 30 in conjunction with the second moving position 15, to cooperate in the injection molding of the charging gun housing 200.
[0036] More specifically, the first sliding position 14 is detachably mounted on the first movable seat 141, and the first sliding position 14 includes a first body molding part 143 and a first handle molding part 144; the second sliding position 15 is detachably mounted on the second movable seat 151, and the second sliding position 15 includes a second body molding part 153 and a second handle molding part 154; the first body molding part 143 and the second body molding part 153 can extend into the first molding cavity 31 to injection mold the housing body 2001, and the first handle molding part 144 and the second handle molding part 154 extend into the second molding cavity 32 to injection mold the housing handle 2002.
[0037] Preferably, the first body forming part 143 has a first abutting inclined surface 1431, and the second body forming part 153 has a second abutting inclined surface 1531. Both the first abutting inclined surface 1431 and the second abutting inclined surface 1531 are inclined along the extension direction of the third axis r3. The first abutting inclined surface 1431 is provided with a first locking protrusion 1432, and the second abutting inclined surface 1531 is provided with a first locking groove 1532. When the first body forming part 143 and the second body forming part 153 are able to extend into the first forming cavity 31, the first locking protrusion 1432 is inserted into the first locking groove 1532.
[0038] In other embodiments, a first groove 1433 is provided on the front side of the first body forming part 143, the first groove 1433 penetrates the front surface of the first body forming part 143 and extends to the right through the first abutting inclined surface 1431; a second locking protrusion 1533 is provided on the second abutting inclined surface 1531, the second locking protrusion 1533 is located in front of the first locking groove; when the first body forming part 143 and the second body forming part 153 enter the forming chamber 30, and the first abutting inclined surface 1431 and the second abutting inclined surface 1531 abut against each other, the second locking protrusion 1533 can be inserted into the first groove 1433.
[0039] Specifically, the right side of the first movable seat 141 is provided with a first insertion interface 1411. The first body forming part 143 and the first handle forming part 144 of the first row position 14 are integrally formed together. The left side of the first body forming part 143 and the first handle forming part 144 is provided with a first insertion square post 145. The first insertion square post 145 can be inserted into the first insertion interface 1411, thereby completing the assembly of the first movable seat 141 and the first row position 14. Subsequently, the first row position 14 can be fastened with screws. The second movable base 151 has a second insertion interface 1511 and a third insertion interface 1512 on its rear side. The second main body forming part 153 and the second handle forming part 154 are designed as separate structures. The second main body forming part 153 has a second insertion post 155 that can be inserted into the second insertion interface 1511, and the second handle forming part 154 has a third insertion post 156 that can be inserted into the third insertion interface 1512. When the second insertion post 155 is inserted into the second insertion interface 1511 and the third insertion post 156 is inserted into the third insertion interface 1512, the second main body forming part 153 and the second handle forming part 154 of the second movable base 151 can be fixed on the second movable base 151 by tightening screws. This structure enables modular installation, allowing for the replacement of different shapes and sizes of the first body molding part 143, the second body molding part 153, the first handle molding part 144, and the second handle molding part 154 according to the different shapes and sizes of the product's internal components. This improves the versatility of the injection mold and reduces its operating costs.
[0040] It should be noted that the first movable seat 141 and the second movable seat 151 are provided with inclined surfaces for the shovel to abut against. After the first movable seat 141 and the second movable seat 151 complete driving the first slide 14 and the second slide 15 into the molding chamber 30, the upper mold plate 20 closes relative to the lower mold plate 10. The shovel can abut against the inclined surfaces of the first movable seat 141 and the second movable seat 151 to lock the specific positions of the first movable seat 141 and the second movable seat 151, thereby achieving the mold-locking effect.
[0041] Furthermore, the lower template 10 is movably mounted with a third mounting position 17. The third mounting position 17 is provided with a third molding protrusion 171, which can extend into the molding chamber 30 to injection mold patterns and grooves onto the surface of the charging gun housing 200. The movement of the third mounting position 17 is achieved by the linkage of the upper template 20's shovel and drive diagonal rod, allowing it to move back and forth into or out of the molding chamber 30.
[0042] Preferably, the first handle forming part 144 is provided with a first forming inclined surface 1441, and the second handle forming part 154 is provided with a second forming inclined surface 1541. When the first hydraulic cylinder 142 drives the first moving part 14 to move to the right and the second hydraulic cylinder 152 drives the second moving part 15 to move backward and to the left obliquely, the first handle forming part 144 and the second handle forming part 154 can enter the second forming cavity 32, and the first forming inclined surface 1441 and the second forming inclined surface 1541 are spaced apart, thereby forming a reinforcing rib (not shown in the figure) inside the housing handle 2002, thereby strengthening the overall strength of the housing handle 2002 and further improving the service life of the charging gun housing 200.
[0043] In other embodiments, the hot melt paste is defined as being injected into the first molding cavity 31 from the injection notch along the fourth axis r4. The fourth axis r4 and the third axis r3 form a first included angle α1, which is between 15 and 85 degrees. This structure ensures that the angle at which the hot melt paste is injected from the injection notch forms an acute angle with the first abutting inclined surface 1431 and the second abutting inclined surface 1531, thereby preventing the pressure of the injected hot melt paste from causing misalignment of the first slide 14 and the second slide 15, thus improving the injection reliability of the injection mold and the production yield of the product.
[0044] Specifically, the lower cavity 111 is provided with multiple lower molding ribs 112 on the side opposite to the injection notch, and each lower molding rib 112 extends upward; the upper cavity 211 is provided with multiple upper molding ribs 212 on the side opposite to the injection notch, and each upper molding rib 212 extends downward; when the upper mold core 21 and the lower mold core 11 are closed, the multiple lower molding ribs 112 can abut against the multiple upper molding ribs 212 and be injection molded into the groove-type reinforcing ribs 2004 of the shell body 2001; the lower molding ribs 112 are provided with ejector pin clearance holes 113, which penetrate downward through the lower surface of the lower mold core 11; the lower mold plate 10 is provided with a second ejector plate 16, which is provided with ejector pins 161, which can extend upward into the ejector pin clearance holes 113 and move up and down through the second ejector plate 16 to protrude or retract from the upper surface of the lower molding ribs 112. This structure allows for balanced and sufficient filling of the hot melt slurry, resulting in a more uniform density and lower internal stress. It avoids localized weak points in the grooved reinforcing rib 2004 caused by uneven filling or uneven shrinkage, enabling the grooved reinforcing rib 2004 to better fulfill its design function of enhancing rigidity and strength.
[0045] Understandably, by setting an ejector pin 161 at the lower molding rib 112 position of the grooved reinforcing rib 2004 used for injection molding, when the ejector pin 161 ejects the body 2001, it can eject the grooved position of the grooved reinforcing rib 2004, so that the ejector pin 161 does not need to eject the body 2001 and the handle 2002. This allows the ejector pin 161 to eject the charging gun housing 200 from a hidden position. This effectively solves the appearance defects such as whitening, stress whitening, and shrinkage marks that occur when the ejector pin 161 ejects the body 2001 and the handle 2002 in traditional technology. It eliminates ejector pin marks, ensures a smooth surface, and facilitates subsequent spraying or achieving a high-gloss finish. By utilizing the grooved reinforcing rib 2004 for ejection, the structural strength of the grooved reinforcing rib 2004 is cleverly utilized in conjunction with the ejection, reducing the possibility of damaging the charging gun housing 200, thereby further improving the production yield of the charging gun housing 200.
[0046] More specifically, the outer surfaces of the first body forming part 143 and the second body forming part 153 can be provided with bone forming grooves 1434, and bone inserts 1435 are provided in the bone forming grooves 1434 for injection molding the internal bone and hole positions of the charging gun housing 200.
[0047] In other embodiments, an injection molding method for an automotive charging gun housing is also provided, wherein the injection mold 100 is applied to the automotive charging gun housing, and the injection molding method includes... Step 1: Provide an injection mold 100 for the car charging gun housing; assemble the lower mold plate 10 and the upper mold plate 20 into the injection molding machine and set the upper mold plate 20 opposite to the lower mold plate 10; drive the upper mold plate 20 to move down relative to the lower mold plate 10 to close the mold or move up relative to the lower mold plate 10 to demold through the ejector pin system of the injection molding machine. Step 2: Before the upper mold plate 20 and the lower mold plate 10 are closed, the first hydraulic cylinder 142 and the second hydraulic cylinder 152 work simultaneously; wherein, the first hydraulic cylinder 142 drives the first sliding position 14 to move to the right along the first axis r1, and the second hydraulic cylinder 152 drives the second sliding position 15 to move backward and diagonally to the left along the second axis r2; so that the first body forming part 143 and the second body forming part 153 enter the first forming cavity 31, and the first locking protrusion 1432 is inserted into the first locking groove 1532; the first handle forming part 144 and the second handle forming part 154 enter the second forming cavity 32; Step 3: The ejector system moves the upper template 20 downward relative to the lower template 10 to close the mold. Step 4: The push rod system moves the first push pin plate 13 downward, causing the glue injection control insert 131 to retract downward from the surface of the lower notch 121, thereby increasing the cross-sectional area of the glue injection notch. Step 5: The hot melt plastic slurry is injected from the injection port 23 through the extrusion system, flows through the injection channel 24 and the injection clearance notch 122, and is injected into the first molding cavity 31 through the injection notch. Step 6: The ejector system moves the first ejector plate 13 upward, causing the glue injection control insert 131 to protrude upward from the lower notch 121, reducing the cross-sectional area of the glue injection notch; Step 7: After the hot melt slurry is injected, let it stand for 30 to 60 seconds to cool and solidify the hot melt slurry in the molding chamber 30 to form the charging gun housing 200. Step 8: The ejection system moves the upper mold base upward to open the mold, so that the upper cavity 211, the upper forming protrusion 22 and the upper forming rib 212 are demolded from the charging gun housing 200. Step 9: The first hydraulic cylinder 142 and the second hydraulic cylinder 152 work simultaneously; wherein, the first hydraulic cylinder 142 drives the first sliding position 14 to move to the left along the first axis, and the second hydraulic cylinder 152 drives the second sliding position 15 to move forward and to the right along the second axis r2; causing the first body forming part 143 and the second body forming part 153 to exit the first forming cavity 31 and be demolded from the housing body 2001, and the first handle forming part 144 and the second handle forming part 154 to exit the second forming cavity 32 and be demolded from the housing handle 2002; Step 10: The ejection system moves the second ejector plate 16 and the first ejector plate 13 upward in tandem, so that the ejector pin 161 protrudes upward from the lower forming rib 112 to abut against the grooved reinforcing rib 2004 and demold the charging gun housing 200 from the lower cavity 111 and the lower forming rib 112 and unload it. Step 11: Repeat steps 2-10 to continue injection molding and eject the charging gun housing 200.
[0048] Specifically, after the upper mold plate 20 moves upward relative to the lower mold plate 10 to open the mold, the first hydraulic cylinder 142 drives the first slide 14 and the second hydraulic cylinder 152 drives the second slide 15 to complete the demolding of the charging gun housing; finally, the ejector pin 161 is used to protrude upward from the lower forming rib 112 to abut against the grooved reinforcing rib 2004 and demold the charging gun housing from the lower cavity 111 and the lower forming rib 112; with this structure, when the charging gun housing is ejected and unloaded, it is not necessary to eject the surface of the housing body 2001 and the housing handle 2002, which can effectively avoid the appearance defects of whitening, stress whitening and shrinkage marks on the surface of the housing body 2001 and the housing handle 2002, eliminate ejector pin marks and ensure that the surface of the charging gun housing is smoother and flatter, which is conducive to subsequent spraying or achieving a high gloss surface.
[0049] The above are merely preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, 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 conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present invention.
Claims
1. An injection mold for an automotive charging gun housing, comprising: The lower template (10) is provided with a lower mold core (11), and the lower mold core (11) has a recessed cavity (111). The upper mold plate (20) is provided with an upper mold core (21), and the upper mold core (21) has an upper cavity (211); when the upper mold plate (20) moves down relative to the lower mold plate (10) to close the mold, the lower cavity (111) and the upper cavity (211) can enclose a molding chamber (30) for injection molding of the charging gun housing (200). Its features are, The lower cavity (111) and the upper cavity (211) are provided with an in-cavity molding part, which is used to injection mold the handle passage (2003) of the charging gun housing (200); the lower template (10) is movably provided with a first position (14) and a second position (15), which can extend into the molding chamber (30) to cooperate with the in-cavity molding part to form a first molding cavity (31) for injection molding the housing body (2001) and a second molding cavity (32) for injection molding the housing handle (2002). The cavity forming part is provided with a glue injection notch on the side facing the first forming cavity (31), and the upper template (20) is provided with a glue injection port (23) and a glue injection channel (24); one end of the glue injection channel (24) is connected to the glue injection port (23), and the other end is connected to the glue injection notch.
2. The injection mold for the car charging gun housing according to claim 1, characterized in that, Intracavity forming section includes The lower forming protrusion (12) is provided in the lower recess (111) and extends upward; and, The upper forming protrusion (22) is provided in the upper concave cavity (211) and extends downward; The upper surface of the lower forming protrusion (12) and the lower surface of the upper forming protrusion (22) are both horizontal planes. When the upper template (20) closes relative to the lower template (10), the upper forming protrusion (22) abuts against the lower forming protrusion (12) and forms the first forming cavity (31) and the second forming cavity (32).
3. The injection mold for the car charging gun housing according to claim 2, characterized in that, The injection notches include a lower notch (121) located on the upper surface of the lower molding protrusion (12) and connected to the first molding cavity (31), and an upper notch (221) located on the lower surface of the upper molding protrusion (22) and connected to the first molding cavity (31). The upper surface of the lower molding protrusion (12) is provided with a glue injection clearance notch (122) that connects to the lower notch (121). The other end of the glue injection channel (24) passes through the lower surface of the upper molding protrusion (22). When the upper mold plate (20) moves down relative to the lower mold plate (10) and closes the mold, the other end of the glue injection channel (24) is connected to the glue injection clearance notch (122).
4. The injection mold for the car charging gun housing according to claim 2 or 3, characterized in that, The lower template (10) is provided with a first ejector plate (13), and the first ejector plate (13) is provided with a glue injection control insert (131), which extends upward to the lower notch (121). When the first ejector plate (13) moves upward, the top of the glue injection control insert (131) can be linked to protrude the lower notch (121) upward; when the first ejector plate (13) moves downward, the top of the glue injection control insert (131) can be linked to retract downward.
5. The injection mold for the car charging gun housing according to any one of claims 1-3, characterized in that, The first moving position (14) has a first movable seat (141), and the first movable seat (141) is connected to a first hydraulic cylinder (142); the second moving position (15) has a second movable seat (151), and the second movable seat (151) is connected to a second hydraulic cylinder (152). Before the upper mold plate (20) and the lower mold plate (10) are closed, the first hydraulic cylinder (142) can move the first moving seat (141) along the first axis (r1) so that the first slide (14) extends into the molding chamber (30); the second hydraulic cylinder (152) can move the second moving seat (151) along the first axis (r1) so that the second slide (15) extends into the molding chamber (30); the extension direction of the first axis (r1) is different from the extension direction of the second axis (r2).
6. The injection mold for the car charging gun housing according to claim 5, characterized in that, The first sliding position (14) is detachably mounted on the first movable base (141). The first sliding position (14) includes a first body forming part (143) and a first handle forming part (144). The second sliding position (15) is detachably mounted on the second movable base (151). The second sliding position (15) includes a second body forming part (153) and a second handle forming part (154). The first body molding part (143) and the second body molding part (153) can extend into the first molding cavity (31) to injection mold the body of the shell (2001), and the first handle molding part (144) and the second handle molding part (154) extend into the second molding cavity (32) to injection mold the handle of the shell (2002).
7. The injection mold for the car charging gun housing according to claim 6, characterized in that, The first body forming part (143) has a first abutting inclined surface (1431), and the second body forming part (153) has a second abutting inclined surface (1531). Both the first abutting inclined surface (1431) and the second abutting inclined surface (1531) are inclined along the extension direction of the third axis (r3). The first abutting inclined surface (1431) is provided with a first locking protrusion (1432), and the second abutting inclined surface (1531) is provided with a first locking groove (1532); when the first body forming part (143) and the second body forming part (153) are able to extend into the first forming cavity (31), the first locking protrusion (1432) is inserted into the first locking groove (1532).
8. The injection mold for the car charging gun housing according to claim 7, characterized in that, The hot melt slurry is injected into the first molding cavity (31) from the injection notch along the fourth axis (r4). The fourth axis (r4) and the third axis (r3) form a first included angle (a1), which is between 15 degrees and 85 degrees.
9. The injection mold for the car charging gun housing according to claim 1, 2, 3, 6, 7, or 8, characterized in that, The lower cavity (111) is provided with multiple lower molding ribs (112) on the other side away from the glue injection notch, and each lower molding rib (112) extends upward; the upper cavity (211) is provided with multiple upper molding ribs (212) on the other side away from the glue injection notch, and each upper molding rib (212) extends downward. When the upper mold core (21) and the lower mold core (11) are closed, multiple lower forming ribs (112) can abut against multiple upper forming ribs (212) and injection mold the groove-type reinforcing ribs (2004) of the shell body (2001). The lower forming rib (112) is provided with an ejector pin clearance hole (113), which extends downward through the lower surface of the lower mold core (11); the lower mold plate (10) is provided with a second ejector plate (16), which is provided with an ejector pin (161). The ejector pin (161) can extend upward into the ejector pin clearance hole (113) and move up and down through the second ejector plate (16) to protrude or retract from the upper surface of the lower forming rib (112).
10. An injection molding method for an automotive charging gun housing, applied to the injection mold (100) for the automotive charging gun housing according to any one of claims 1-9, characterized in that, Injection molding methods include Step 1: Provide an injection mold (100) for the car charging gun housing, assemble the lower mold plate (10) and the upper mold plate (20) into the injection molding machine, and set the upper mold plate (20) and the lower mold plate (10) opposite to each other. Drive the upper mold plate (20) to move down relative to the lower mold plate (10) to close the mold or move up relative to the lower mold plate (10) to demold through the ejector pin system of the injection molding machine. Step 2: Before the upper mold plate (20) and lower mold plate (10) are closed, the first hydraulic cylinder (142) and the second hydraulic cylinder (152) work simultaneously; wherein, the first hydraulic cylinder (142) drives the first slide (14) to move to the right along the first axis (r1), and the second hydraulic cylinder (152) drives the second slide (15) to move backward and to the left obliquely along the second axis (r2); so that the first body forming part (143) and the second body forming part (153) enter the first forming cavity (31), and the first locking protrusion (1432) is inserted into the first locking groove (1532); the first handle forming part (144) and the second handle forming part (154) enter the second forming cavity (32). Step 3: The ejector system moves the upper template (20) downward relative to the lower template (10) to close the mold. Step 4: The push rod system moves the first push pin plate (13) downward, causing the glue injection control insert (131) to retract downward from the surface of the lower notch (121) to increase the cross-sectional area of the glue injection notch; Step 5: The hot melt plastic slurry is injected from the injection port (23) through the extrusion system, flows through the injection channel (24) and the injection clearance notch (122), and is injected into the first molding cavity (31) through the injection notch; Step 6: The ejector system moves the first ejector plate (13) upward, causing the glue injection control insert (131) to protrude upward from the lower notch (121), reducing the cross-sectional area of the glue injection notch; Step 7: After the hot melt slurry is injected, let it stand for 30 to 60 seconds to cool and solidify the hot melt slurry in the molding chamber (30) to form the charging gun housing (200). Step 8: The ejection system moves the upper mold base upward to open the mold, so that the upper cavity (211), the upper forming protrusion (22) and the upper forming rib (212) are demolded from the charging gun housing (200); Step 9: The first hydraulic cylinder (142) and the second hydraulic cylinder (152) work simultaneously; wherein, the first hydraulic cylinder (142) drives the first sliding position (14) to move to the left along the first axis (r1), and the second hydraulic cylinder (152) drives the second sliding position (15) to move forward and to the right along the second axis (r2); causing the first body forming part (143) and the second body forming part (153) to exit the first forming cavity (31) and be demolded from the housing body (2001), and the first handle forming part (144) and the second handle forming part (154) to exit the second forming cavity (32) and be demolded from the housing handle (2002); Step 10: The ejection system moves the second ejector plate (16) and the first ejector plate (13) upwards in tandem, causing the ejector pin (161) to protrude upwards from the lower forming rib (112) to abut against the grooved reinforcing rib (2004) and demold the charging gun housing (200) from the lower cavity (111) and the lower forming rib (112) and unload it. Step 11: Repeat steps 2-10 to continue injection molding and eject the charging gun housing (200).