Die structure for preventing thin-wall hardware from being crushed for electrical plastic products

Abstract

The utility model provides a mold structure for preventing a thin-wall hardware from being crushed for an electrical plastic product, which can overcome the defects in the prior art, realize the accurate positioning of a workpiece (the thin-wall hardware provided by the utility model) to be subjected to injection molding, and ensure that the workpiece to be subjected to injection molding can be tightly attached to a lower mold core; and meanwhile, an injection molding workpiece can be prevented from being scratched and damaged by the sliding block component in the mold opening and closing process, and the production efficiency and the yield are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and particularly relates to a mold structure for preventing thin-wall metal parts from being bruised in an electrical plastic product. Background Art

[0002] The electrical plastic product adopts a structure that combines two different materials, namely plastic and metal. For products that require encapsulation treatment, the process of placing the metal parts in an injection mold for injection molding is adopted, and the obtained products have high quality. Therefore, injection molds are widely used.

[0003] The utility model relates to injection molding treatment of a workpiece to be injection molded (such as Figure 1 the shown thin-wall metal part). The thin-wall metal part has a flat pentagonal ring structure with a thickness of only 0.15 mm. Limited by the structure of the thin-wall metal part 1, when the prior art performs injection molding treatment on it, there is a problem that it cannot be accurately positioned; at the same time, it is also impossible to ensure that the bottom surface of the thin-wall metal part is completely attached to the surface of the injection molding position of the prior art mold, which will cause the products after injection molding treatment to not meet the standards; in addition, when the product injection molding treatment is completed and the mold is opened and reset, the slider assembly of the prior mold is likely to cause abrasion and damage to the thin-wall metal part, increasing the production cost and affecting the production efficiency. Summary of the Utility Model

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a mold structure for preventing thin-wall metal parts from being bruised in an electrical plastic product.

[0005] The mold structure provided by the utility model can overcome the defects of the prior art, realize accurate positioning of the workpiece to be injection molded (a thin-wall metal part 1 is provided in this embodiment), and ensure that the workpiece to be injection molded can be closely attached to the lower mold core; at the same time, it can also avoid the thin-wall metal part to be injection molded from being abraded and damaged by the slider component during the mold opening and closing process, greatly improving the production efficiency and the qualified product rate. The technical solution of the utility model is introduced as follows:

[0006] A mold structure for preventing thin-wall metal parts from being bruised in an electrical plastic product includes an upper template, a lower template, an upper mold core, a lower mold core, and also includes slider B and slider C; the slider B includes a slider B slider seat, a slider B lifter base, a slider B angle pin, and a slider B insert structure;

[0007] The slider B lifter base is fixed to the upper template by screws; the slider B angle pin is arranged on the upper template; the slider B slider seat is arranged on the lower template, the slider B slider seat is provided with an angle pin through hole that cooperates with the slider B angle pin, and the slider B slider seat is provided with an inclined surface that is tightly fitted with the slider B lifter base;

[0008] The slider B insert structure includes the slider B insert, the slider B limit screw, and the round wire spring. The tail of the slider B insert is processed with a T-shaped guide platform, and T-shaped guide bosses are arranged on both sides. The head is processed with a guide inclined surface. The head of the slider B slider seat is processed with a T-shaped guide groove that matches the T-shaped guide platform. The slider B insert is connected to the slider B slider seat through the T-shaped guide groove. The slider B insert and the slider C insert float upward by 0.3 - 0.5 mm along the T-shaped guide groove under the action of the round wire spring.

[0009] The slider C and the slider B are symmetrically arranged left and right on the lower template, and the component composition and connection method of the slider C are exactly the same as those of the slider B.

[0010] The lower die core is provided with an injection molding treatment position that matches the workpiece to be injection molded.

[0011] A U-shaped groove and a round hole are formed at the tail of the workpiece to be injection molded. The injection molding treatment position is provided with a U-shaped boss that matches the U-shaped groove and a positioning round pin that matches the round hole.

[0012] The connection method between the slider B slider seat and the slider B insert is as follows: After the slider B limit screw passes through the slider B insert, the round wire spring is sleeved at the bottom, and then the T-shaped guide platform of the slider B insert is inserted into the T-shaped guide groove of the slider B slider seat, and the slider B limit screw is tightened. A through hole that matches the slider B limit screw and the round wire spring is arranged at the tail of the slider B insert. A screw hole that matches the slider B limit screw and the round wire spring is arranged on the slider B slider seat.

[0013] The mold structure further includes a slider A, a pressure block, and a hydraulic cylinder.

[0014] Two pressure blocks are arranged on the rear end face of the lower die core. The slider A is arranged between the two pressure blocks. The pressure block is connected to the lower template through screws. One end of the pressure block is connected to the lower die core, and the other end is connected to the oil cylinder fixing block. The oil cylinder fixing block is installed on the lower template through screws. The rear end face of the oil cylinder fixing block is connected to the hydraulic cylinder.

[0015] A T-shaped groove is arranged at the tail of the slider A. The pressure block is provided with a guide chute structure. Guide platform structures that match the guide chute of the pressure block are arranged on both sides of the slider A. The hydraulic cylinder is provided with a T-shaped connection part structure that matches the T-shaped groove of the slider A.

[0016] A positioning groove structure is arranged at the head of the slider A.

[0017] A limiting groove is provided on the contact surface between the bottom of the slider B slider seat or the slider C slider seat and the lower template, and a limiting clip matching the limiting groove is provided on the lower template;

[0018] The number of limiting grooves at the bottom of the slider B slider seat or the slider C slider seat is 2;

[0019] The slider B slider seat or the slider C slider seat is provided with a locking structure; the locking structure includes a locking tongue, a flat wire spring, a fixed block and a flat head screw; the tail of the locking tongue is connected with a flat wire spring, and the outside of the flat wire spring is locked and fixed through a fixed cover and a flat head screw;

[0020] The head of the locking tongue is processed with a guiding inclined surface, and the tail is processed with a hanging platform, and the tail hanging platform is used for limiting the locking tongue;

[0021] The mold structure further includes a slider B inclined guide post fixed block and a slider C inclined guide post fixed block; the slider B inclined guide post passes through the inclined guide post fixed block and is fixed to the upper template by screws.

[0022] Beneficial effects

[0023] The utility model provides a mold structure for preventing the thin-walled metal part from being bruised in an electrical plastic product, which can overcome the defects of the prior art, realize the precise positioning of the workpiece to be injection-molded (a thin-walled metal part is provided in the utility model), and ensure that the workpiece to be injection-molded can be closely attached to the lower mold core; at the same time, it can also avoid the injection-molded workpiece from being scratched and damaged by the slider component during the opening and closing process of the mold, greatly improving the production efficiency and the qualified product rate. Brief description of the drawings

[0024] Figure 1 It is the drawing of the thin-walled metal part and the product

[0025] Figure 2 It is the preliminary positioning and partial enlarged drawing of the thin-walled metal part

[0026] Figure 3 It is the cross-sectional view of the precise positioning of the thin-walled metal part

[0027] Figure 4 It is the precise positioning partial enlarged drawing of the thin-walled metal part

[0028] Figure 5 It is the exploded view of the slider B parts

[0029] Explanation of the marks in the figure:

[0030] 1 - thin-walled metal part 2 - product

[0031] 3 - slider B lifter base 4 - slider B inclined guide post

[0032] 5 - upper mold core 6 - slider C inclined guide post

[0033] 7 - Slide block C shovel base 8 - Upper template

[0034] 9 - Lower template 10 - Hydraulic cylinder

[0035] 11 - Slide block A 12 - Slide block B slide block seat

[0036] 13 - Slide block B limit screw 14 - Slide block B slide block insert

[0037] 15 - Slide block C slide block insert 16 - Slide block C limit screw

[0038] 17 - Slide block C slide block seat 18 - Lock tongue

[0039] 19 - Round wire spring 20 - Limit clip

[0040] 21 - Flat wire spring 22 - Fixed block

[0041] 23 - Flat head screw 24 - Slide block B inclined guide pillar fixed block

[0042] 25 - Slide block C inclined guide pillar fixed block 26 - Lower die core

[0043] 27 - Pressure block 28 - Oil cylinder fixed block Detailed implementation mode

[0044] Embodiment

[0045] Combined with Figures 1 to 4 The structure and working principle of a mold for preventing thin - walled metal parts from being crushed and damaged in an electrical plastic product provided by the present utility model are described.

[0046] In this embodiment, a workpiece to be injection - molded is a thin - walled metal part 1 as Figure 1 shown. The thin - walled metal part 1 has a flat pentagonal ring structure, and its thickness is only 0.15 mm. Limited by the structure of the thin - walled metal part 1, when the prior art performs injection - molding treatment on it, there are problems of inability to accurately position it; nor can it ensure that the bottom surface of the thin - walled metal part 1 is completely attached to the surface of the injection - molding treatment position of the prior - art mold, which will cause the product after injection - molding treatment to not meet the standards; in addition, when the product injection - molding treatment is completed and the mold is opened and reset, the slide block assembly of the prior mold is likely to cause abrasion and damage to the thin - walled metal part 1.

[0047] The mold structure provided by the present utility model can overcome the defects of the prior art, achieve precise positioning of the workpiece to be injection-molded (a thin-walled metal part 1 is provided in this embodiment), ensure that the workpiece to be injection-molded can be closely attached to the lower mold core; at the same time, it can also prevent the workpiece to be injection-molded from being scratched and damaged by the slider component during the mold opening and closing process, greatly improving the production efficiency and the qualified product rate;

[0048] In order to overcome the defects of the prior art, the present utility model provides a mold structure for preventing a thin-walled metal part from being crushed in an electrical plastic product, including an upper template 8, a lower template 9, an upper mold core 5, a lower mold core 26, a slider A 11, a slider B, and a slider C;

[0049] The upper mold core 5 is fixedly installed on the upper template 8, and the lower mold core 26 is fixedly installed on the lower template 9; the lower mold core 26 is provided with an injection molding treatment position that matches the shape of the thin-walled metal part; the injection molding treatment position is used to position and fix the workpiece to be injection-molded, and perform injection molding treatment on the thin-walled metal part 1 when the mold is closed;

[0050] Two pressing blocks 27 are arranged at the rear end face of the lower mold core 26; a slider A 11 is arranged between the two pressing blocks 27; the pressing blocks 27 are connected to the lower template 9 by screws; one end of the pressing block 27 is connected to the lower mold core 26, and the other end is connected with an oil cylinder fixing block 28; the oil cylinder fixing block 28 is installed on the lower template 9 by screws; a hydraulic oil cylinder 10 is connected to the rear end face of the oil cylinder fixing block;

[0051] The tail of the slider A 11 is provided with a T-shaped groove; the two side faces of the slider A 11 are provided with a guide platform structure that matches the guide chute of the pressing block 27; the two pressing blocks 27 are provided with a guide chute structure; the head of the slider A 11 is provided with a positioning groove structure; the hydraulic oil cylinder 10 is provided with a T-shaped connecting part structure that matches the T-shaped groove of the slider A 11; the function of such a setting is that when the mold is in the open mold state, the slider A 11 slides horizontally under the action of the hydraulic oil cylinder 10, conveys the workpiece to be injection-molded to the position of the lower mold core 26, and after the workpiece to be injection-molded is taken off manually, it is positioned and fixed at the injection molding treatment position of the lower mold core 26 for injection molding treatment;

[0052] Considering the need for positioning accuracy of the thin-walled metal part 1, the present utility model designs the mold structure through two steps of preliminary positioning and precision positioning;

[0053] The lower die insert 26 of the present utility model is installed on the lower template 9 by screws; the lower die insert 26 is provided with an injection molding treatment position that matches the shape of the thin-walled hardware part; the injection molding treatment position is used to position and fix the workpiece to be injection molded, so as to facilitate the next injection molding treatment. The thin-walled hardware part 1 is formed with a U-shaped groove and a round hole at the tail; the injection molding treatment position is provided with a U-shaped boss that matches the U-shaped groove and a positioning round pin that matches the round hole; the U-shaped boss and the positioning round pin of the thin-walled hardware part 1 are used to complete the preliminary positioning of the thin-walled hardware part 1;

[0054] After the preliminary positioning of the thin-walled hardware part 1 is completed, due to the limitation of its product structure, there is a tendency to move upward during the injection molding process. Therefore, precise positioning of the thin-walled hardware part 1 is also required. The precise positioning of the thin-walled hardware part 1 is achieved through the mutual cooperation between the lower die insert 26, slider A, slider B, and slider C; at the same time, the mutual cooperation between the lower die insert 26, slider B, and slider C can achieve the close fit between the thin-walled hardware part 1 and the injection molding treatment position when the mold is closed;

[0055] Slider B and slider C have a completely symmetrical structure, and their component compositions and connection methods are exactly the same. Here, only slider B will be introduced in detail. The slider B includes a slider B slider seat 12, a slider B lifter base 3, a slider B angled pin 4, an angled pin fixing block 25, a slider B locking structure, a slider B insert structure, and a limit clamp 20;

[0056] The slider B locking structure is two sets of completely symmetrical and identical structures, which are arranged on the left and right sides of the slider B slider seat 12. Installation holes that match the locking structure are provided on the left and right sides of the slider B slider seat 12; here, only one side of the slider B locking structure will be introduced in detail. The slider B locking structure includes a locking tongue 18, a flat wire spring 21, a fixing block 22, and a flat head screw 23; the head of the locking tongue 18 is processed with a guiding inclined surface, and the tail is processed with a hanging platform, and the tail hanging platform is used for limiting; the tail of the locking tongue 18 is connected with a flat wire spring 21, and it is locked and fixed by a fixing cover and a flat head screw on the outside;

[0057] The slider B lifter base 3 is fixed to the upper template 8 by screws; the slider B angled pin 4 passes through the angled pin fixing block and is fixed to the upper template 8 by screws;

[0058] The slider B insert structure includes a slider B slider insert 14, a slider B limit screw 13, and a round wire spring 19; the tail of the slider B slider insert 14 is processed with a T-shaped guiding platform, and guiding T-shaped bosses are provided on both sides. The head is processed with a guiding inclined surface. The function of the guiding inclined surface is to ensure that the slider B slider insert 14 never contacts the thin-walled hardware part 1 during the reset process, thereby avoiding abrasion and damage to the thin-walled hardware part 1;

[0059] The head of the slider B slider seat 12 is machined with a T-shaped guiding groove that mates with the T-shaped guiding platform; the slider B slider insert 14 is connected to the slider B slider seat 12 through the T-shaped guiding groove; the specific connection method is that after the slider B limit screw passes through the slider B slider insert 14, a round wire spring 19 is sleeved at the bottom, and then the T-shaped guiding platform of the slider B slider insert is inserted into the T-shaped guiding groove of the slider B slider seat, and the slider B limit screw is tightened; a through hole that mates with the slider B limit screw 13 and the round wire spring 19 is provided at the tail of the slider B slider insert 14; screw holes that mate with the slider B limit screw 13 and the round wire spring 19 are provided on the slider B slider seat 12; when the mold is opened and reset, under the action of the round wire spring 19, the slider B slider insert 14 can always keep the guiding inclined surface at the head floating by 0.3 mm;

[0060] Guiding platforms protrude outward on the left and right sides at the bottom of the slider B slider seat 12, and two limiting grooves are machined on the back surface. The lower template 9 is provided with T-shaped guiding grooves on the left and right sides of the slider B slider seat 12, and a limiting clip 20 that mates with the limiting grooves is installed; when the product is tightly clamped during mold closing, the first limiting groove of the slider B slider seat 12 is stuck at the top of the limiting clip 20; when the product is opened and reset, the second limiting groove of the slider B slider seat 12 is stuck at the top of the limiting clip 20.

[0061] The working principle of the present utility model is introduced as follows:

[0062] Since the slider seats (slider B and C), inclined guide columns (slider B and C), and slider scraping bases (slider B and C) of the present utility model are all two sets of completely identical left-right symmetrical structures, only the relevant components of slider B are introduced herein;

[0063] When the injection molding process of the thin-walled hardware part 1 by the mold is completed, the mold changes from the mold closing state to the mold opening state. The upper template 8 moves upward, driving the upper mold core 5, the slider B inclined guide column 4, and the slider B scraping base 3 to move upward. The slider B slider seat 12 is reset synchronously until the second limiting groove is stuck at the top of the limiting clip 20; at the same time, the upper mold core 5 moves upward and resets, and the slider B slider insert 14 starts to separate from the surface of the thin-walled hardware part 1. Under the action of the round wire spring 19, the slider B slider insert 14 floats up by 0.3 mm; at the same time, due to the guiding inclined surface provided at the head of the slider B slider insert 14, the slider B slider insert 14 never contacts the thin-walled hardware part 1 during the reset process, thereby avoiding abrasion and damage to the thin-walled hardware part 1.

[0064] When the mold needs to perform injection molding on the workpiece to be injection molded, the mold is in the open mold state. The slider A11 slides horizontally under the action of the hydraulic cylinder 10 to transfer the workpiece to be injection molded to the lower mold core 26. After the workpiece to be injection molded is taken off by the operator, it is positioned and fixed at the injection molding position of the lower mold core 26 for injection molding. At this time, the workpiece to be injection molded (thin-walled metal part 1) is preliminarily positioned, that is, the U-shaped groove provided at the tail of the thin-walled metal part 1 is cooperatively fixed with the U-shaped boss and the round pin of the lower mold core 26; then, as the upper template drives the slider B inclined guide pillar 4, the slider B base 3, and the upper mold core 5 to move downward, the position of the slider B slider seat 12 is limited by the slider B inclined guide pillar 4 and the slider B base 3, and the first limit groove of the slider B slider seat 12 is stuck at the top of the limit clip; during the downward movement of the upper mold core 5, when the upper mold core 5 contacts the slider B slider insert 14, the round wire spring 19 at the lower part of the slider B slider insert 14 is compressed, so that the slider B slider insert moves downward together with the upper mold core; after the mold is closed, the slider B slider insert 14 fits on the surface of the thin-walled metal part 1. At this time, the thin-walled metal part 1 reaches precise positioning in the mold cavity and is suitable for injection molding.

Claims

1. A mold structure for preventing thin-walled metal parts from being bruised in an electrical plastic product, including an upper template, a lower template, an upper mold core, and a lower mold core, characterized in that, It further includes slider B and slider C; the slider B includes a slider B base, a slider B lifter, a slider B angled guide pillar, and a slider B insert structure; The slider B lifter is fixed to the upper template by screws; the slider B angled guide pillar is arranged on the upper template; the slider B base is arranged on the lower template, and the slider B base is provided with an angled guide pillar through-hole that mates with the slider B angled guide pillar, and the slider B base is provided with an inclined surface that tightly mates with the slider B lifter; The slider B insert structure includes a slider B insert, a slider B limit screw, and a round wire spring. The tail of the slider B insert is machined with a T-shaped guiding platform, and guiding T-shaped protrusions are arranged on both sides. The head is machined with a guiding inclined surface; the head of the slider B base is machined with a T-shaped guiding groove that mates with the T-shaped guiding platform; the slider B insert is connected to the slider B base through the T-shaped guiding groove; the slider B insert and the slider C insert float upward by 0.3 - 0.5 mm along the T-shaped guiding groove under the action of the round wire spring; The slider C and the slider B are symmetrically arranged left and right on the lower template, and the component composition and connection method of the slider C are exactly the same as those of the slider B; The lower mold core is provided with an injection molding treatment position that mates with the workpiece to be injection molded.

2. The mold structure according to claim 1, wherein The tail of the workpiece to be injection molded is formed with a U-shaped groove and a round hole. The injection molding treatment position is provided with a U-shaped protrusion that mates with the U-shaped groove and a positioning round pin that mates with the round hole.

3. The mold structure according to claim 1, wherein, The connection method between the slider B base and the slider B insert is as follows: after the slider B limit screw passes through the slider B insert, a round wire spring is sleeved at the bottom, and then the T-shaped guiding platform of the slider B insert is inserted into the T-shaped guiding groove of the slider B base, and the slider B limit screw is tightened; a through-hole that mates with the slider B limit screw and the round wire spring is provided at the tail of the slider B insert; a screw hole that mates with the slider B limit screw and the round wire spring is provided on the slider B base.

4. The mold structure according to claim 1, characterized in that, The mold structure further includes slider A, a pressure block, and a hydraulic cylinder; Two pressure blocks are arranged on the rear end face of the lower mold core; slider A is arranged between the two pressure blocks; the pressure block is connected to the lower template by screws; one end of the pressure block is connected to the lower mold core, and the other end is connected to the oil cylinder fixing block; the oil cylinder fixing block is installed on the lower template by screws; a hydraulic cylinder is connected to the rear end face of the oil cylinder fixing block; The tail of the slider A is provided with a T-shaped groove; the pressure block is provided with a guide chute structure; guiding platforms that mate with the guide chute of the pressure block are arranged on both sides of the slider A; the hydraulic cylinder is provided with a T-shaped connection part structure that mates with the T-shaped groove of the slider A.

5. The mold structure according to claim 4, wherein, The head of the slider A is provided with a positioning groove structure.

6. The mold structure according to claim 1, characterized in that, A limit groove is provided on the contact surface between the bottom of the slider B base or the slider C base and the lower template, and the lower template is provided with a limit clamp that mates with the limit groove.

7. The mold structure according to claim 6, characterized in that, The number of limit grooves at the bottom of the slider B base or the slider C base is 2.

8. The mold structure according to claim 1, characterized in that, The slider B slider seat or the slider C slider seat is provided with a locking structure; the locking structure includes a locking tongue, a flat wire spring, a fixing block and a flat head screw; the tail of the locking tongue is connected with a flat wire spring, and the outside of the flat wire spring is locked and fixed through a fixing cover and a flat head screw.

9. The mold structure according to claim 8, characterized in that, The head of the locking tongue is processed with a guiding inclined surface, and the tail is processed with a hanging platform, and the hanging platform at the tail is used for limiting the locking tongue.

10. The mold structure according to claim 1, characterized in that, The die structure further includes a slider B inclined guide post fixing block and a slider C inclined guide post fixing block; the slider B inclined guide post passes through the inclined guide post fixing block and is fixed to the upper template by screws.

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