Precise injection mold for electronic product

Abstract

The invention discloses a precise injection mold for electronic products, which comprises an upper mold plate provided with an upper mold core, a lower mold plate provided with a lower mold core, a bottom base plate arranged below the lower mold plate, and a first side pulling slide block and a second side pulling slide block which are arranged oppositely, the end faces of the ends, facing the inclined pulling sliding block, of the first side pulling sliding block and the second side pulling sliding block are each provided with a protruding block on the outer side of the cavity area, and the inclined pulling sliding block is provided with a through hole allowing the two oppositely-arranged protruding blocks to be embedded therein. At least one vertically-extending back-jacking spring is arranged between the movable top plate capable of moving in the vertical direction and the lower die plate, an inclined drawing shovel base is installed on the movable top plate, and an inclined part is arranged at the upper end of the vertical part of the inclined drawing shovel base with the lower end connected with the movable top plate. The section difference stability of a formed product is improved, consistent and attractive appearance is guaranteed, the precise forming effect that a clamped wire is visible and cannot be touched is achieved, and the mold opening and closing structure is simple.

Description

Technical Field

[0001] The invention relates to a precision injection mold for electronic products, belonging to the technical field of injection molds. Background Art

[0002] Headphones are a pair of conversion units that receive electrical signals from a media player or receiver and convert them into audible sound waves using a speaker close to the ear. Headphones are composed of a headphone shell, which is generally made of plastic. In the process of producing headphones, the headphone shell needs to be injection molded. The injection mold is generally suitable for thermoplastic plastic heating and molding. Using the hot melt principle of thermoplastic plastic, the molten plastic is injected into the mold cavity through an injection molding machine, and then cooled and shaped. The mold is opened to take out the plastic product. Injection molding requires a fixed mold and a movable mold. Due to the high requirements for appearance, the mold structure in the prior art cannot meet the high requirements for appearance of headphones. Summary of the invention

[0003] The purpose of the present invention is to provide a precision injection mold for electronic products. The precision injection mold for electronic products not only meets the requirements of the precise appearance of the product after molding through three groups of core-pulling sliders, but also improves the stability of the step difference of the molded product, ensures the consistent and beautiful appearance, achieves a precise molding effect with visible but intangible clamping lines, and has a simple opening and closing mold structure.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a precision injection mold for electronic products, comprising: an upper mold plate with an upper mold core installed, a lower mold plate with a lower mold core installed, a bottom substrate arranged below the lower mold plate, and a first side-drawing slider and a second side-drawing slider arranged opposite to each other, the lower mold plate and the bottom substrate are connected by two support bars arranged at intervals, the first side-drawing slider and the second side-drawing slider are each slidably installed on the lower mold plate and can approach or move away from each other in the horizontal direction, the upper mold plate is equipped with two slider shovel bases corresponding to the first side-drawing slider and the second side-drawing slider, a vertically movable ejector plate is horizontally arranged between the two support bars, and at least one vertically extending return needle spring is arranged between the ejector plate with ejectors installed and the lower mold plate; The ends of the first side-drawing slider and the second side-drawing slider that are close to each other can be slidably embedded in the lower mold core, and the upper surface of the lower mold core and the area between the first side-drawing slider and the second side-drawing slider are provided with a mounting through hole that extends obliquely downward, and an inclined drawing slider can be slidably installed in the mounting through hole. When in the mold closing state, the end surface of the upper end of the inclined inclined drawing slider and the upper mold core, the lower mold core and the first side-drawing slider and the second side-drawing slider that are close to each other form a cavity for molding products, and the upper end of the ejector pin can be embedded in this cavity. The first side-drawing slider and the second side-drawing slider are each provided with a convex block on the end surface of one end of the inclined drawing slider and located on the outside of the cavity area. The inclined drawing slider is provided with a through hole for two relatively arranged convex blocks to be embedded. During the mold closing process, the two convex blocks that are close to each other are synchronously embedded in the through hole on the inclined drawing slider; The lower end of the inclined pull-out slide passes through a mounting through hole and is slidably connected to an inclined pull-out slide seat that can slide in the horizontal direction. The inclined pull-out slide seat is provided with an inclined inclined pull-out slide groove at one end near the inclined pull-out slide, for the lower end of the inclined pull-out slide to be embedded in the inclined pull-out slide, and the end of the inclined pull-out slide groove near the lower mold core is lower than the other end. The inclined pull-out slide block whose lower end surface is in sliding contact with the bottom surface of the inclined pull-out slide groove is matched with the side wall of the inclined pull-out slide groove by at least one group of guide protrusions and guide grooves. A movable top plate is horizontally arranged above the ejector plate, and at least one vertically extending return spring is arranged between the movable top plate and the lower template that can move in the vertical direction. An inclined pull-out shovel base is installed on the movable top plate, and the upper end of the vertical part of the inclined pull-out shovel base connected with the movable top plate at the lower end has a The cam is provided with an inclined portion, and an inclined guide groove is provided on the lower surface of the inclined pull-out slider seat opposite to one end of the inclined pull-out slider for the inclined portion on the inclined pull-out shovel base to be embedded. The upper end of the inclined guide groove whose inner wall is in sliding contact with the inclined portion is inclined toward the direction close to the inclined pull-out slider. An ejector column is installed on the lower surface of the movable ejector plate, and a first through hole is provided on the ejector plate for the vertically extending ejector column to pass through. The lower end of the ejector column has a flange portion extending radially outward, and an annular groove matching the flange portion is provided on the lower surface of the ejector plate and located outside the first through hole. A second through hole is provided on the bottom base plate for the flange portion on the ejector column to pass through. When in the mold closing state, an ejection gap is provided between the upper surface of the flange portion and the bottom surface of the annular groove.

[0005] The further improved scheme in the above technical scheme is as follows: 1. In the above scheme, an oblique draw-out bundle block is installed on the upper template and located on the side of the oblique draw-out slider seat opposite to the oblique draw-out slider, the upper end of the vertically extended oblique draw-out bundle block is connected to the upper template, the lower end of the oblique draw-out bundle block is provided with a first oblique cut surface facing the oblique draw-out slider seat, and the upper part of the oblique draw-out slider seat opposite to the end of the oblique draw-out slider is provided with a second oblique cut surface matching the first oblique cut surface, the first oblique cut surface and the second oblique cut surface are consistent with the inclination direction of the oblique guide groove, and when in the mold closing state, the first oblique cut surface is tightly fitted with the second oblique cut surface.

[0006] 2. In the above solution, the cross-sectional width of the vertical portion of the oblique shovel base that is slidably matched with the lower template is smaller than the cross-sectional width of its inclined portion.

[0007] 3. In the above scheme, when in the mold closing state, the upper end of the inclined portion of the inclined shovel base passes through an inclined guide groove that runs through from top to bottom.

[0008] 4. In the above scheme, a limit column is installed on the upper surface of the movable top plate. When in the mold closing state, the distance between the upper end surface of the limit column and the lower surface of the lower mold plate is greater than the ejection interval.

[0009] 5. In the above solution, the lower mold core, the first side-drawing slider, the second side-drawing slider and the oblique-drawing slider seat are each embedded and installed in a lower accommodating groove opened on the upper surface of the lower mold plate.

[0010] 6. In the above solution, the lower accommodating groove is provided with guide components respectively cooperating with the first side-drawing slider, the second side-drawing slider and the oblique-drawing slider seat.

[0011] 7. In the above solution, the upper surface of the lower mold core is provided with a first sliding groove and a second sliding groove respectively cooperating with the first side pull-out slider and the second side pull-out slider.

[0012] 8. In the above scheme, the oblique pull-out sliding block and the two side walls of the oblique pull-out sliding groove are respectively connected by a set of guide protrusions and guide grooves.

[0013] 9. In the above solution, the guide groove is formed on the side wall of the oblique drawer slide, and the guide protrusion slidably embedded in the guide groove is formed on the outer surface of the lower end of the oblique drawer slide.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. In the precision injection mold for electronic products of the present invention, a mounting through hole extending obliquely downward is provided on the upper surface of the lower mold core and in the area between the first side-drawing slider and the second side-drawing slider, and an oblique-drawing slider is slidably installed in the mounting through hole. When in the mold closing state, the end surface of the upper end of the oblique-drawing slider and the upper mold core, the lower mold core, and the first side-drawing slider and the second side-drawing slider close to each other form a cavity for molding the product, and the upper end of the ejector pin can be embedded in the cavity. The first side-drawing slider and the second side-drawing slider are each located on the end surface of one end of the oblique-drawing slider and located in the cavity area. The outer side is provided with a protrusion, and the oblique pull-out slider is provided with a through hole for two relatively arranged protrusions to be embedded. During the mold closing process, the two protrusions close to each other are synchronously embedded in the through hole on the oblique pull-out slider. While the precise appearance requirements of the product after molding are met by the three sets of core-pulling sliders, the position accuracy of the mold closing of the three core-pulling sliders is improved, and the relative movement of multiple core-pulling sliders during mold closing to form tiny tolerances and cause obvious clamping lines on the molded products is avoided, the stability of the step difference of the molded products is improved, the consistent and beautiful appearance is ensured, the precise molding effect with visible but not touchable clamping lines is achieved, and the mold opening and closing structure is simple.

[0015] 2. The precision injection mold of electronic products of the present invention further comprises a movable top plate horizontally arranged above the ejector plate, and at least one vertically extending return spring is arranged between the movable top plate that can move in the vertical direction and the lower template, and an inclined shovel base is installed on the movable top plate, and the upper end of the inclined shovel base connected with the movable top plate at the lower end is provided with an inclined portion, and the inclined pull-out slider seat is provided with an inclined guide groove for the inclined portion on the inclined pull-out shovel base to be embedded on the lower surface opposite to one end of the inclined pull-out slider, and the upper end of the inclined guide groove whose inner wall is in sliding contact with the inclined portion is inclined toward the direction close to the inclined pull-out slider, and an ejector column is installed on the lower surface of the movable top plate, and a first through hole is provided on the ejector plate for the vertically extending ejector column to pass through, and the lower end of the ejector column has a flange portion extending radially outward, and an annular groove matching the flange portion is provided on the lower surface of the ejector plate and located outside the first through hole, and a second through hole is provided on the bottom substrate for the flange portion on the ejector column to pass through, and when in the mold closing state, the upper surface of the flange portion There is an ejection gap between the bottom surface of the annular groove and the bottom surface of the annular groove. Through a mechanical drive with a simple structure, while effectively controlling the cost, it is possible to achieve stable control of the moving direction and sequence of the three core-pulling sliders during the opening and closing molds, and to achieve continuous wedging and positioning of the sliders during the closing mold injection molding process with stable pressure-bearing performance, thereby avoiding the situation where the appearance of the finished product is unqualified due to the displacement of the sliders; in addition, an oblique drawing bundle block is installed on the upper template and located on the side of the oblique drawing slider seat opposite to the oblique drawing slider, the upper end of the vertically extending oblique drawing bundle block is connected to the upper template, and the lower end of the oblique drawing bundle block is provided with a first oblique cut surface facing the oblique drawing slider seat, and the upper part of the oblique drawing slider seat opposite to one end of the oblique drawing slider is provided with a second oblique cut surface matching the first oblique cut surface, the first oblique cut surface and the second oblique cut surface are consistent with the inclination direction of the oblique guide groove, and when in the closing mold state, the first oblique cut surface is tightly fitted with the second oblique cut surface, thereby further improving the stability of the position of the oblique drawing slider during the closing mold injection molding process and improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 This is a schematic diagram of the overall structure of the precision injection mold for the electronic product of the present invention; Attached Figure 2 It is a schematic cross-sectional view of the overall structure of the precision injection mold for the electronic product of the present invention along AA'; Attached Figure 3 It is a schematic diagram of the injection core-pulling structure of the precision injection mold of the electronic product of the present invention; Attached Figure 4 It is a cross-sectional schematic diagram of the injection core-pulling structure of the injection mold of the present invention along DD'; Attached Figure 5 This is a schematic diagram of the first step of the mold opening process of the precision injection mold for the electronic product of the present invention; Attached Figure 6 This is a schematic diagram of the second step of the mold opening process of the precision injection mold for the electronic product of the present invention; Attached Figure 7 This is a schematic diagram of the third step of the mold opening process of the precision injection mold for the electronic product of the present invention.

[0017] In the above drawings: 1, upper template; 2, lower template; 3, upper mold core; 31, glue injection channel; 4, lower mold core; 41, mounting through hole; 42, stop step surface; 51, first side pull-out slider; 52, second side pull-out slider; 53, positioning protrusion; 54, positioning groove; 6, slider shovel base; 7, oblique pull-out slider; 71, flange surface; 8, oblique pull-out slider seat; 81, oblique pull-out slide groove; 91, guide protrusion; 92, guide groove; 10, cavity; 11, bottom base plate; 12, support bar; 13, ejector plate; 131, ejector; 13 2. Return needle spring; 133. Return needle guide column; 141. Guide column; 142. Guide sleeve; 15. Bump; 16. Through hole; 17. Movable top plate; 171. Return top spring; 172. Return top guide column; 18. Oblique pull-out shovel base; 181. Inclined portion; 182. Vertical portion; 19. Oblique guide groove; 20. Ejector column; 21. First through hole; 22. Flange portion; 23. Annular groove; 24. Second through hole; 25. Ejector spacer; 26. Limit column; 27. Oblique pull-out bundle block; 281. First beveled surface; 282. Second beveled surface. DETAILED DESCRIPTION

[0018] The present invention can be further understood by the specific examples given below, but they are not intended to limit the present invention.

[0019] Embodiment 1: A precision injection mold for electronic products, comprising: an upper mold plate 1 with an upper mold core 3 installed, a lower mold plate 2 with a lower mold core 4 installed, a bottom substrate 11 arranged below the lower mold plate 2, and a first side-drawing slider 51 and a second side-drawing slider 52 arranged opposite to each other, the lower mold plate 2 and the bottom substrate 11 are connected by two support bars 12 arranged at intervals, the first side-drawing slider 51 and the second side-drawing slider 52 are each slidably installed on the lower mold plate 2 and can move closer to or away from each other in the horizontal direction, the upper mold plate 1 is equipped with two slider shovel bases 6 corresponding to the first side-drawing slider 51 and the second side-drawing slider 52, a vertically movable ejector plate 13 is horizontally arranged between the two support bars 12, and at least one vertically extending return needle spring 132 is arranged between the ejector plate 13 with an ejector 131 installed and the lower mold plate 2; The ends of the first side-drawing slider 51 and the second side-drawing slider 52 that are close to each other can be slidably embedded in the lower mold core 4. The upper surface of the lower mold core 4 and the area between the first side-drawing slider 51 and the second side-drawing slider 52 are provided with a mounting through hole 41 that extends obliquely downward. An oblique-drawing slider 7 is slidably mounted in the mounting through hole 41. When in the mold closing state, the end surface of the upper end of the oblique-drawing slider 7 is in contact with the upper mold core 3, the lower mold core 4 and the first side-drawing slider 51 and the second side-drawing slider 52 that are close to each other. A cavity 10 for molding a product is formed between the two side-drawing sliders 52, and the upper end of the ejector pin 131 can be embedded in the cavity 10. A convex block 15 is provided on the end surface of each of the first side-drawing slider 51 and the second side-drawing slider 52 facing one end of the oblique-drawing slider 7 and located outside the cavity 10 area. A through hole 16 is provided on the oblique-drawing slider 7 for two oppositely arranged convex blocks 15 to be embedded. During the mold closing process, the two convex blocks 15 close to each other are synchronously embedded in the through hole 16 on the oblique-drawing slider 7. The lower end of the oblique pull-out slide block 7 passes through the mounting through hole 41 and is slidably connected to an oblique pull-out slide block seat 8 that can slide in the horizontal direction. The oblique pull-out slide block seat 8 is provided with an obliquely arranged oblique pull-out slot 81 at one end close to the oblique pull-out slide block 7, and the end of the oblique pull-out slot 81 close to the lower mold core 4 for the lower end of the oblique pull-out slide block 7 to be embedded is lower than the other end. The oblique pull-out slide block 7 whose lower end surface is in sliding contact with the bottom surface of the oblique pull-out slot 81 is matched with the side wall of the oblique pull-out slot 81 by at least one group of guide protrusions 91 and guide grooves 92. A movable top plate 17 is horizontally arranged above the ejector plate 13, and at least one vertically extending return spring 171 is arranged between the movable top plate 17 that can move in the vertical direction and the lower mold plate 2. An oblique pull-out shovel base 18 is installed on the movable top plate 17, and the upper end of the vertical portion 182 of the oblique pull-out shovel base 18 connected with the movable top plate 17 at the lower end has an inclined portion 1 81, an oblique guide groove 19 is provided on the lower surface of the oblique pull-out slider seat 8 opposite to one end of the oblique pull-out slider 7 for the inclined portion 181 on the oblique pull-out shovel base 18 to be embedded, and the upper end of the oblique guide groove 19 whose inner wall is in sliding contact with the inclined portion 181 is inclined toward the direction close to the oblique pull-out slider 7, and an ejector column 20 is installed on the lower surface of the movable ejector plate 17, and a first through hole 21 is provided on the ejector pin plate 13 for the vertically extending ejector column 20 to pass through, and the lower end of the ejector column 20 has a flange portion 22 extending radially outward, and an annular groove 23 is provided on the lower surface of the ejector pin plate 13 and is located outside the first through hole 21 and cooperates with the flange portion 22, and a second through hole 24 is provided on the bottom base plate 11 for the flange portion 22 on the ejector column 20 to pass through, and when in the mold closing state, an ejection gap 25 is provided between the upper surface of the flange portion 22 and the bottom surface of the annular groove 23.

[0020] An oblique drawing bundle block 27 is installed on the upper template 1 and located on the side of the oblique drawing slider seat 8 opposite to the oblique drawing slider 7. The upper end of the oblique drawing bundle block 27 extending vertically is connected to the upper template 1. The lower end of the oblique drawing bundle block 27 is provided with a first oblique cut surface 281 facing the oblique drawing slider seat 8. The upper part of the oblique drawing slider seat 8 opposite to the oblique drawing slider 7 is provided with a second oblique cut surface 282 matching the first oblique cut surface 281. The first oblique cut surface 281 and the second oblique cut surface 282 are consistent with the inclined direction of the oblique guide groove 19. When in the mold closing state, the first oblique cut surface 281 and the second oblique cut surface 282 are tightly fitted. The cross-sectional width of the vertical portion 182 of the above-mentioned inclined shovel base 18 that is slidably matched with the lower mold plate 2 is smaller than the cross-sectional width of its inclined portion 181; when in the mold closing state, the upper end of the inclined portion 181 of the above-mentioned inclined shovel base 18 passes through the inclined guide groove 19 that passes through the upper and lower parts; a limiting column 26 is installed on the upper surface of the above-mentioned movable top plate 17, and when in the mold closing state, the distance between the upper end surface of the limiting column 26 and the lower surface of the lower mold plate 2 is greater than the ejection interval 25; The lower mold core 4, the first side-drawing slider 51, the second side-drawing slider 52 and the oblique-drawing slider seat 8 are each embedded and installed in the lower accommodating groove opened on the upper surface of the lower mold plate 2; The lower receiving groove is provided with guide components respectively cooperating with the first side-drawing slider 51, the second side-drawing slider 52 and the oblique-drawing slider seat 8; A plurality of guide posts 141 are connected between the bottom substrate 11 and the lower mold plate 2. Each of the guide posts 141 passes through the ejector plate 13 and the movable ejector plate 17 in sequence and is slidably matched with the ejector plate 13 and the movable ejector plate 17 through a guide sleeve 142 respectively. The return spring 171 is sleeved on the outside of a return guide post 172, and the upper end of the return guide post 172, whose lower end is connected to the movable top plate 17, is slidably matched with the lower template 2; A plurality of spring grooves are provided on the lower surface of the lower template 2 for the upper ends of the return spring 132 and the return spring 171 to be embedded therein.

[0021] Embodiment 2: A precision injection mold for electronic products, comprising: an upper mold plate 1 with an upper mold core 3 installed, a lower mold plate 2 with a lower mold core 4 installed, a bottom substrate 11 arranged below the lower mold plate 2, and a first side-drawing slider 51 and a second side-drawing slider 52 arranged opposite to each other, the lower mold plate 2 and the bottom substrate 11 are connected by two support bars 12 arranged at intervals, the first side-drawing slider 51 and the second side-drawing slider 52 are each slidably installed on the lower mold plate 2 and can move closer to or away from each other in the horizontal direction, the upper mold plate 1 is equipped with two slider shovel bases 6 corresponding to the first side-drawing slider 51 and the second side-drawing slider 52, a vertically movable ejector plate 13 is horizontally arranged between the two support bars 12, and at least one vertically extending return needle spring 132 is arranged between the ejector plate 13 with an ejector 131 installed and the lower mold plate 2; The ends of the first side-drawing slider 51 and the second side-drawing slider 52 that are close to each other can be slidably embedded in the lower mold core 4. The upper surface of the lower mold core 4 and the area between the first side-drawing slider 51 and the second side-drawing slider 52 are provided with a mounting through hole 41 that extends obliquely downward. An oblique-drawing slider 7 is slidably mounted in the mounting through hole 41. When in the mold closing state, the end surface of the upper end of the oblique-drawing slider 7 is in contact with the upper mold core 3, the lower mold core 4 and the first side-drawing slider 51 and the second side-drawing slider 52 that are close to each other. A cavity 10 for molding a product is formed between the two side-drawing sliders 52, and the upper end of the ejector pin 131 can be embedded in the cavity 10. A convex block 15 is provided on the end surface of each of the first side-drawing slider 51 and the second side-drawing slider 52 facing one end of the oblique-drawing slider 7 and located outside the cavity 10 area. A through hole 16 is provided on the oblique-drawing slider 7 for two oppositely arranged convex blocks 15 to be embedded. During the mold closing process, the two convex blocks 15 close to each other are synchronously embedded in the through hole 16 on the oblique-drawing slider 7. The lower end of the oblique pull-out slide block 7 passes through the mounting through hole 41 and is slidably connected to an oblique pull-out slide block seat 8 that can slide in the horizontal direction. The oblique pull-out slide block seat 8 is provided with an obliquely arranged oblique pull-out slot 81 at one end close to the oblique pull-out slide block 7, and the end of the oblique pull-out slot 81 close to the lower mold core 4 for the lower end of the oblique pull-out slide block 7 to be embedded is lower than the other end. The oblique pull-out slide block 7 whose lower end surface is in sliding contact with the bottom surface of the oblique pull-out slot 81 is matched with the side wall of the oblique pull-out slot 81 by at least one group of guide protrusions 91 and guide grooves 92. A movable top plate 17 is horizontally arranged above the ejector plate 13, and at least one vertically extending return spring 171 is arranged between the movable top plate 17 that can move in the vertical direction and the lower mold plate 2. An oblique pull-out shovel base 18 is installed on the movable top plate 17, and the upper end of the vertical portion 182 of the oblique pull-out shovel base 18 connected with the movable top plate 17 at the lower end has an inclined portion 1 81, an oblique guide groove 19 is provided on the lower surface of the oblique pull-out slider seat 8 opposite to one end of the oblique pull-out slider 7 for the inclined portion 181 on the oblique pull-out shovel base 18 to be embedded, and the upper end of the oblique guide groove 19 whose inner wall is in sliding contact with the inclined portion 181 is inclined toward the direction close to the oblique pull-out slider 7, and an ejector column 20 is installed on the lower surface of the movable ejector plate 17, and a first through hole 21 is provided on the ejector pin plate 13 for the vertically extending ejector column 20 to pass through, and the lower end of the ejector column 20 has a flange portion 22 extending radially outward, and an annular groove 23 is provided on the lower surface of the ejector pin plate 13 and is located outside the first through hole 21 and cooperates with the flange portion 22, and a second through hole 24 is provided on the bottom base plate 11 for the flange portion 22 on the ejector column 20 to pass through, and when in the mold closing state, an ejection gap 25 is provided between the upper surface of the flange portion 22 and the bottom surface of the annular groove 23.

[0022] The lower mold core 4, the first side-drawing slider 51, the second side-drawing slider 52 and the oblique-drawing slider seat 8 are each embedded and installed in the lower accommodating groove opened on the upper surface of the lower mold plate 2; The lower receiving groove is provided with guide components respectively cooperating with the first side-drawing slider 51, the second side-drawing slider 52 and the oblique-drawing slider seat 8; The upper parts of the two slider shovel bases 6 are respectively embedded in the upper receiving grooves provided on the lower surface of the upper template 1 and fixedly connected with the upper template 1 by bolts; The return needle spring 132 is sleeved on the outside of a return needle guide post 133, and the upper end of the return needle guide post 133, whose lower end is connected to the ejector plate 13, is slidably matched with the lower template 2; A plurality of guide posts 141 are connected between the bottom substrate 11 and the lower mold plate 2. Each of the guide posts 141 passes through the ejector plate 13 and the movable ejector plate 17 in sequence and is slidably matched with the ejector plate 13 and the movable ejector plate 17 through a guide sleeve 142 respectively. The return spring 171 is sleeved on the outside of a return guide post 172, and the upper end of the return guide post 172, whose lower end is connected to the movable top plate 17, is slidably matched with the lower template 2; A plurality of spring grooves are provided on the lower surface of the lower template 2 for the upper ends of the return spring 132 and the return spring 171 to be inserted; The upper surface of the lower mold core 4 is provided with a first slide groove and a second slide groove respectively cooperating with the first side pull-out slider 51 and the second side pull-out slider 52; The above-mentioned oblique draw slide block 7 and the two side walls of the oblique draw slide groove 81 are respectively connected by a set of guide protrusions 91 and guide grooves 92; The guide groove 92 is formed on the side wall of the oblique draw-out slide groove 81 , and the guide protrusion 91 slidably embedded in the guide groove 92 is formed on the outer surface of the lower end of the oblique draw-out slide block 7 .

[0023] Working principle: When in the mold closing state, the oblique pull-out slider is located at the top of its stroke, the upper mold core and the lower mold core are close to each other in the vertical direction, the first side pull-out slider and the second side pull-out slider are close to each other in the horizontal direction, and the protrusions thereon are respectively embedded in the through holes on the oblique pull-out slider, and the molten glue is injected into the cavity surrounded by the oblique pull-out slider, the upper mold core, the lower mold core, the first side pull-out slider and the second side pull-out slider through the glue injection channel to perform injection molding, cooling and molding of the product to be processed; After the product is cooled and formed, the mold is opened; The main process of mold opening is as follows: First, as attached Figure 5 The upper mold plate is driven to move away from the lower mold plate in the vertical direction. During this process, the upper mold core, the slider shovel base and the oblique draw-out bundle block all move with the upper mold plate, so that the upper mold core is separated from the lower mold core to achieve demoulding, the first side draw-out slider and the second side draw-out slider are driven by the slider shovel base to move away from each other in the horizontal direction to achieve demoulding, and the first chamfered surface on the oblique draw-out bundle block is separated from the second chamfered surface on the oblique draw-out slider seat to release the oblique draw-out slider seat so that the oblique draw-out slider seat can move in the horizontal direction; Next, as attached Figure 6 The ejector column is driven to move upward in the vertical direction for a distance H1 until the flange on the ejector column fits with the bottom surface of the annular groove on the ejector plate. During this process, the ejector plate remains stationary, and the movable ejector plate drives the inclined shovel base to move upward and compress the return spring under the push of the ejector column. As the inclined portion on the inclined shovel base moves upward in the inclined guide groove on the inclined slide block seat, the vertical movement is converted into horizontal movement through the action of the inclined surfaces that slide with each other. The inclined shovel base pushes the inclined slide block seat away from the lower mold core in the horizontal direction, and then the guide protrusion and the guide groove in the inclined slide groove cooperate with each other, and the inclined slide block is pulled by the inclined slide block seat to slide downward and backward in the mounting through hole on the lower mold core to realize demoulding; Finally, as attached Figure 7 As shown, the ejector column is continuously driven to move upward in the vertical direction for a distance H2 until the upper end surface of the limit column contacts the lower surface of the lower mold plate. During this process, the flange on the ejector column pushes the ejector plate and the movable ejector plate to move upward at the same time and compresses the return needle spring and the return ejector spring respectively. The inclined slide block seat continues to move away from the lower mold core in the horizontal direction under the push of the inclined portion of the upwardly moving inclined shovel base. The upper end of the ejector moved upward with the ejector plate penetrates into the cavity to eject the product formed in the cavity upward, thereby realizing the final demoulding of the product. The mold is closed again to process and shape the next product; The main process of mold closing is as follows: The upward thrust on the ejector column is cancelled, and the ejector plate moves down a distance H2 to reset under the action of the return spring, and the movable ejector plate moves down a distance H2+H1 to reset under the action of the return spring, and resets along with the downwardly moved ejector column until there is an ejection interval H1 between the upper surface of its upper flange and the bottom surface of the annular groove on the ejector plate; During the downward movement of the ejector plate, the upper end of the ejector that moves downward is pulled out of the cavity; during the downward movement of the movable ejector plate, the inclined slide block seat approaches the lower die core in the horizontal direction under the reverse push of the inclined portion of the inclined shovel base, and the inclined slide block slides forward and upward in the mounting through hole on the lower die core under the reverse push of the inclined slide block seat until the flange surface on the inclined slide block is in contact with the stop step surface in the mounting through hole; The upper template is driven to move downward in the vertical direction and approach the lower template. During this process, the upper mold core, the slider shovel base and the oblique draw block all move downward with the upper mold core, so that the upper mold core and the lower mold core are close to each other in the vertical direction, the first side draw slider and the second side draw slider are driven by the slider shovel base to approach each other in the horizontal direction, and the two mutually close protrusions thereon are synchronously embedded in the through holes on the oblique draw slider to achieve mold closing, the first chamfered surface on the oblique draw block is in close contact with the second chamfered surface on the oblique draw slider seat to constrain the oblique draw slider seat and prevent it from moving in the horizontal direction, and the molten glue is injected into the cavity surrounded by the oblique draw slider, the upper mold core, the lower mold core, the first side draw slider and the second side draw slider through the glue injection channel again, and the product to be processed is injection molded, cooled and formed.

[0024] When the precision injection mold of the above-mentioned electronic product is used, the precision appearance requirements of the product after molding are met through the three sets of core-pulling sliders, while the position accuracy of the three core-pulling sliders in the mold closing is improved, so that the relative movement of multiple core-pulling sliders during mold closing to form a small tolerance leads to obvious clamping lines on the molded product, and the stability of the step difference of the molded product is improved, and the consistent and beautiful appearance is ensured, so as to achieve a precision molding effect in which the clamping lines are visible but not touched, and the mold opening and closing structure is simple; It further uses a simple mechanical drive method to effectively control costs while achieving stable control of the moving direction and sequence of the three core-pulling sliders during the opening and closing process, and can achieve continuous wedging and positioning of the sliders with stable pressure-bearing performance during the closing and injection molding process, thereby avoiding the situation where the appearance of the finished product is unqualified due to slider offset. In addition, it further improves the stability of the position of the oblique pull-out slider during the closing and injection molding process, thereby improving the product yield.

[0025] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A precision injection mold for electronic products, comprising: An upper mold plate (1) equipped with an upper mold core (3), a lower mold plate (2) equipped with a lower mold core (4), a bottom base plate (11) arranged below the lower mold plate (2), and a first side-drawing slider (51) and a second side-drawing slider (52) arranged opposite to each other, the lower mold plate (2) and the bottom base plate (11) are connected via two support bars (12) arranged at intervals, the first side-drawing slider (51) and the second side-drawing slider (52) are each slidably mounted on the lower mold plate (2) and can move toward or away from each other in the horizontal direction, the upper mold plate (1) is equipped with two slider shovel bases (6) corresponding to the first side-drawing slider (51) and the second side-drawing slider (52), a vertically movable ejector plate (13) is horizontally arranged between the two support bars (12), and at least one vertically extending return needle spring (132) is arranged between the ejector plate (13) equipped with an ejector (131) and the lower mold plate (2); The invention is characterized in that: the ends of the first side-drawing slider (51) and the second side-drawing slider (52) which are close to each other can be slidably embedded in the lower mold core (4); a mounting through hole (41) which extends obliquely downward is provided in the upper surface of the lower mold core (4) and in the area between the first side-drawing slider (51) and the second side-drawing slider (52); an oblique-drawing slider (7) is slidably installed in the mounting through hole (41); when in the mold closing state, the end surface of the upper end of the oblique-drawing slider (7) is in contact with the upper mold core (3), the lower mold core (4) and the first side-drawing slider (51) and the second side-drawing slider (52) which are close to each other. A cavity (10) for molding a product is formed between the second side-drawing sliders (52), and the upper end of the ejector pin (131) can be embedded in the cavity (10). The first side-drawing slider (51) and the second side-drawing slider (52) are each provided with a protrusion (15) on their end surfaces facing one end of the oblique-drawing slider (7) and located outside the cavity (10) area. The oblique-drawing slider (7) is provided with a through hole (16) for two oppositely arranged protrusions (15) to be embedded. During the mold closing process, the two protrusions (15) that are close to each other are synchronously embedded in the through hole (16) on the oblique-drawing slider (7); The lower end of the oblique draw-out slide block (7) passes through the mounting through hole (41) and is slidably connected to an oblique draw-out slide block seat (8) that can slide in the horizontal direction. The oblique draw-out slide block seat (8) is provided with an obliquely arranged oblique draw-out groove (81) at one end close to the oblique draw-out slide block (7). The oblique draw-out groove (81) close to the lower mold core (4) for the lower end of the oblique draw-out slide block (7) to be embedded is lower than the other end. The oblique draw-out slide block (7) whose lower end surface is in sliding contact with the bottom surface of the oblique draw-out groove (81) is connected to the side wall of the oblique draw-out groove (81). The guide groove (92) is connected to the guide groove (92) by at least one group of guide protrusions (91), a movable top plate (17) is horizontally arranged above the ejector plate (13), at least one vertically extending return spring (171) is arranged between the movable top plate (17) and the lower template (2) and the movable top plate (17) is movable in the vertical direction. An inclined shovel base (18) is installed on the movable top plate (17), and the upper end of the vertical portion (182) of the inclined shovel base (18) connected to the movable top plate (17) at the lower end has an inclined portion (181) ), an oblique guide groove (19) is provided on the lower surface of the oblique pull-out slider seat (8) opposite to the end of the oblique pull-out slider (7) for the inclined portion (181) on the oblique pull-out shovel base (18) to be inserted, the upper end of the oblique guide groove (19) whose inner wall is in sliding contact with the inclined portion (181) is inclined in a direction close to the oblique pull-out slider (7), an ejection column (20) is installed on the lower surface of the movable ejector plate (17), and a first through hole (21) is provided on the ejector pin plate (13) for the ejection column (20) to pass through in a vertically extending manner, The lower end of the ejector column (20) has a flange portion (22) extending radially outward, the lower surface of the ejector plate (13) is provided with an annular groove (23) cooperating with the flange portion (22) and located outside the first through hole (21), and the base plate (11) is provided with a second through hole (24) for the flange portion (22) on the ejector column (20) to pass through, and when in a mold closing state, an ejection gap (25) is provided between the upper surface of the flange portion (22) and the bottom surface of the annular groove (23).

2. The precision injection mold for electronic products according to claim 1, characterized in that: An oblique draw-out bundle block (27) is installed on the upper template (1) and located on the side of the oblique draw-out slider seat (8) opposite to the oblique draw-out slider (7); the upper end of the oblique draw-out bundle block (27) extending vertically is connected to the upper template (1); the lower end of the oblique draw-out bundle block (27) is provided with a first oblique cut surface (281) facing the oblique draw-out slider seat (8); the upper part of the oblique draw-out slider seat (8) opposite to the oblique draw-out slider (7) is provided with a second oblique cut surface (282) matching the first oblique cut surface (281); the first oblique cut surface (281) and the second oblique cut surface (282) are in the same inclination direction as the oblique guide groove (19); when in a mold closing state, the first oblique cut surface (281) and the second oblique cut surface (282) are tightly fitted.

3. The precision injection mold for electronic products according to claim 1, characterized in that: The cross-sectional width of the vertical portion (182) of the inclined shovel base (18) that is slidably matched with the lower template (2) is smaller than the cross-sectional width of the inclined portion (181) thereof.

4. The precision injection mold for electronic products according to claim 1 or 3, characterized in that: When in the mold closing state, the upper end of the inclined portion (181) of the inclined shovel base (18) passes through an inclined guide groove (19) that passes through from top to bottom.

5. The precision injection mold for electronic products according to claim 1, characterized in that: A limiting column (26) is installed on the upper surface of the movable top plate (17); when in the mold closing state, the distance between the upper end surface of the limiting column (26) and the lower surface of the lower mold plate (2) is greater than the ejection interval (25).

6. The precision injection mold for electronic products according to claim 1, characterized in that: The lower mold core (4), the first side-drawing slider (51), the second side-drawing slider (52) and the oblique-drawing slider seat (8) are each embedded and installed in a lower accommodating groove formed on the upper surface of the lower mold plate (2).

7. The precision injection mold for electronic products according to claim 6, characterized in that: The lower accommodating groove is provided with guide components respectively cooperating with the first side-drawing slider (51), the second side-drawing slider (52) and the oblique-drawing slider seat (8).

8. The precision injection mold for electronic products according to claim 1, characterized in that: The upper surface of the lower die core (4) is provided with a first sliding groove and a second sliding groove respectively cooperating with the first side-drawing slider (51) and the second side-drawing slider (52).

9. The precision injection mold for electronic products according to claim 1, characterized in that: The oblique draw-out slide block (7) and the two side walls of the oblique draw-out slide groove (81) are respectively connected in cooperation with each other through a set of guide protrusions (91) and guide grooves (92).

10. The precision injection mold for electronic products according to claim 1 or 3, characterized in that: The guide groove (92) is formed on the side wall of the oblique draw slide groove (81), and the guide protrusion (91) slidably embedded in the guide groove (92) is formed on the outer surface of the lower end of the oblique draw slide block (7).

Images