CN220362887U

CN220362887U - Insert injection mold

Info

Publication number: CN220362887U
Application number: CN202321787255.8U
Authority: CN
Inventors: 齐鸣
Original assignee: Perlman Electrical Kunshan Co ltd
Current assignee: Perlman Electrical Kunshan Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-01-19
Anticipated expiration: 2033-07-10

Abstract

The utility model discloses an insert injection mold in the technical field of product injection molding, and aims to solve the problem of unqualified quality in the lead frame assembly process in the prior art. The device comprises a male die, a first driving mechanism, an upper floating block and a lower floating block; the male die comprises an upper male die and a lower male die which are arranged up and down; the male die core of the upper male die is provided with a longitudinally through channel, and the lead frame is correspondingly arranged on the male die core above the channel; the upper floating block and the lower floating block are in up-down contact and are arranged in an assembly cavity between the upper part male die and the lower part male die; a floating insert is arranged above the upper floating block, and the end head of the floating insert is placed in the channel; the first driving mechanism drives the lower floating block to move left and right in the assembly cavity, so that when the upper floating block moves up and down in the assembly cavity, the end head of the floating insert is ejected out along the channel to enter the limit hole of the lead frame or exit the limit hole of the lead frame; the utility model is suitable for lead frame assembly and can improve the quality of lead frame assembly.

Description

Insert injection mold

Technical Field

The utility model relates to an insert injection mold, and belongs to the technical field of product injection molding.

Background

Injection molded products with lead frames are often seen in everyday life, particularly in the automotive industry. The lead frame is put into a product cavity formed by injection molding, and then plastic coating forming is carried out.

The biggest difficulty that this kind of product was met in the in-process of production is when packing into the mould die cavity with the lead frame, and the slider is in the die sinking state this moment, so the lead frame is not enough stably abundant in the mould die cavity this moment, and the lead frame appears scraping with the slotted hole on the slider very easily when the slider compound die and inserts and produce the metal chip, perhaps produces high pressure effect because of injection molding machine pressure and plastic flow when moulding plastics and makes the lead frame produce the skew, causes the final product adverse event.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the insert injection mold which is simple in structure and easy to assemble and operate, and the assembly process of products such as lead frames is ensured to be stable, so that the overall quality of the products is improved.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides an insert injection mold, which comprises a male mold, a second driving mechanism, a first driving mechanism, an upper floating block and a lower floating block; the male die comprises an upper male die and a lower male die which are arranged up and down; the upper part male die is provided with a male die core;

the male die core is provided with a longitudinally through channel, and the lead frame is correspondingly arranged on the male die core above the channel; the upper floating block and the lower floating block are in up-down contact with each other and are arranged in an assembly cavity between the upper part male die and the lower part male die; a floating insert is arranged above the upper floating block in a contact manner, and the end head of the floating insert is arranged in the channel;

the first driving mechanism drives the lower floating block to move left and right in the transverse travel range of the assembly cavity, and drives the upper floating block to move up and down in the longitudinal travel range of the assembly cavity, and the end of the floating insert is ejected out along the channel to enter the limiting hole of the lead frame for limiting or exit the limiting hole of the lead frame.

Further, the device also comprises a second driving mechanism; the second driving mechanism comprises a second oil cylinder and a sliding block fixing mechanism; the second oil cylinder is arranged on one side of the male die; the sliding block fixing mechanism is connected in the upper part male die in a sliding way; a second piston rod in the second oil cylinder penetrates through the upper part male die and is connected with the sliding block fixing mechanism; and when the second oil cylinder drives the second piston rod to move leftwards, one end of the lead frame is inserted into a sliding block on the sliding block fixing mechanism to finish assembly.

Further, the cross sections of the contact surfaces of the upper floating block and the lower floating block are respectively in an inclined Z shape; when the lower slider moves to the leftmost end of the assembly cavity, the highest end of the Z shape of the lower slider contacts with the highest end of the Z shape of the upper slider, so that the upper slider moves upwards; when the lower slider moves to the rightmost end of the assembly cavity, the highest end of the zigzag of the lower slider contacts the lowest end of the zigzag of the upper slider, causing the upper slider to move downward.

Further, a first countersunk hole and an assembly via hole which are communicated are formed in the bottom of the floating insert from bottom to top; the threaded end of the first shoulder screw penetrates through the first countersunk hole and the assembly through hole to be screwed in the male die core, and the cup head end is limited in the first countersunk hole, so that the floating insert floats up and down relative to the cup head end of the first shoulder screw; the height of the first counter bore is larger than the stroke displacement of the floating insert floating up and down; the spring is sleeved on the screw rod part of the first shoulder screw, and the inner diameter of the spring is larger than the diameter of the assembly through hole.

Further, the device also comprises a first guide block and a second guide block; the first guide block and the second guide block are arranged on the left side and the right side of the upper floating block and play a role in guiding the upper floating block in the assembly cavity.

Further, the device also comprises a first stop block, a second stop block and a bottom plate; the first stop block and the second stop block are respectively arranged at the left side and the right side of the bottom plate; a limiting block is arranged on the bottom plate; the lower floating block is in sliding connection with a sliding groove on the limiting block.

Further, the upper floating block is provided with at least two positioning holes; the cup end of the second shoulder screw is limited and fixed in a second countersunk hole on the upper floating block, and the threaded end penetrates through the positioning hole and is vertically screwed and fixed on the bottom plate, so that the upper floating block moves up and down along the screw rod part of the second shoulder screw.

Further, the second guide block is provided with an open first assembly groove, and the second stop block is provided with an open second assembly groove.

Further, the first driving mechanism comprises a first oil cylinder; the first oil cylinder is arranged on one side of the male die; a first piston rod in the first oil cylinder enters the assembly cavity through the first assembly groove and the second assembly groove to be connected with the lower floating block; when the first cylinder drives the first piston rod to move left and right, the lower floating block moves left and right in a range between the first stop block and the second stop block.

Further, an open clearance hole is formed in the right side of the upper floating block.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model provides an insert injection mold, wherein a floating insert is arranged above an upper floating block in the structure, and the end head of the floating insert is arranged in a channel; the upper floating block and the lower floating block are matched and arranged in the assembly cavity, the first driving mechanism drives the lower floating block to move leftwards so that the upper floating block can move upwards, thereby jacking the floating insert, enabling the end head of the floating insert to extend out of the through channel and penetrate through the limiting hole of the lead frame, and the limiting and fixing effects on the lead frame are achieved, so that the butt joint and insertion of the sliding block and the lead frame are conveniently completed; after the assembly is completed, the first driving mechanism drives the lower floating block to move rightwards, so that the upper floating block can move downwards, the floating insert is withdrawn from the limiting hole and retracted into the channel, and the action is repeated to complete the batch assembly of the lead frames.

Drawings

FIG. 1 is a schematic diagram of an insert injection mold according to the present utility model;

FIG. 2 is a schematic view of the portion of FIG. 1;

FIG. 3 is a schematic illustration of a specific assembly of a portion of the structure of FIG. 1;

FIG. 4 is a schematic view of the structure of an upper slider and a lower slider;

FIG. 5 is a schematic diagram of the operation of an insert injection mold;

FIG. 6 is a schematic view of a floating insert;

FIG. 7 is an enlarged schematic view of FIG. 1 at A;

in the figure: 1. an upper male mold; 2. a lower male mold; 3. a male mold core; 4. a channel; 5. an assembly chamber; 6. an upper slider; 7. a lower slider; 8. a floating insert; 9. a first driving mechanism; 10. a second driving mechanism; 11. a first cylinder; 12. a second cylinder; 13. a slider fixing mechanism; 14. a first shoulder screw; 15. a spring; 16. a first guide block; 17. a second guide block; 18. positioning holes; 19. the second shoulder screw; 20. a first fitting groove; 21. a second fitting groove; 22. a clearance hole; 23. a limiting block; 24. a bottom plate; 25. a first stopper; 26. a second stopper; 27. an oil groove; 28. a lead frame; 29. a limiting hole; 30. a first counterbore; 31. assembling the via hole; 32. a second counterbore; 33. and a second oil groove.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

Example 1

Referring to fig. 1 to 7, the present application provides an insert injection mold including a male mold, a first driving mechanism 9, an upper slider 6, and a lower slider 7. The male die comprises an upper male die 1 and a lower male die 2, wherein the upper male die 1 is arranged above the lower male die 2, and a mounting assembly cavity 5 is formed between the upper male die 1 and the lower male die 2. The upper part male die 1 is provided with a male die core 3, the male die core 3 is provided with a longitudinally through channel 4, the male die core 3 above the corresponding channel 4 is provided with a placing groove for placing a lead frame 28, the lead frame 28 is placed in the placing groove, and a limiting block 23 on the lead frame 28 is opposite to the channel 4.

The upper slider 6 and the lower slider 7 are placed in the assembly chamber 5 in contact with each other up and down. And the space of the assembly chamber 5 is arranged to allow the upper slider 6 to move up and down and the lower slider 7 to move left and right. A floating insert 8 is fixedly arranged above the upper floating block 6, and the end head of the floating insert 8 is arranged in the channel 4. Namely, the upper male die 1 is provided with a floating groove for accommodating the floating insert 8, and the bottom end of the floating groove is communicated with the assembly cavity 5, so that the accommodated floating insert 8 is contacted with the upper floating block 6; the top end of the floating groove is communicated with the channel 4, so that the end head of the floating insert 8 extends into the channel 4.

The first driving mechanism 9 is connected with the lower slider 7, and the first driving mechanism 9 drives the lower slider 7 to move leftwards in the transverse travel range in the assembly cavity 5, and the lower slider 7 moves leftwards to jack up the upper slider 6 to move upwards in the longitudinal travel range along the assembly cavity 5. Thereby jack up the floating insert 8, so that the end of the floating insert 8 extends out of the channel 4 and then penetrates through the limit hole 29 of the lead frame 28 to limit the lead frame 28; the first drive mechanism 9 drives the lower slider 7 to move rightward over the lateral travel range in the fitting chamber 5, and the lower slider 7 moves rightward so that the upper slider 6 moves downward over the longitudinal travel range in the fitting chamber 5. So that the floating insert 8 moves down so that the end of the floating insert 8 exits the limiting aperture 29 of the lead frame 28 and is retracted into the channel 4.

Optionally, the present insert injection mold further comprises a second driving mechanism 10. The second driving mechanism 10 includes a second cylinder 12 and a slider fixing mechanism 13. The slide fixing mechanism 13 is slidably connected in the upper male mold 1 (a linear mold set may be adopted), so that the slide fixing mechanism 13 moves linearly left and right within a set range of the upper male mold 1. A second piston rod of the second oil cylinder 12 passes through the upper male die 1 and is connected with the slide block fixing mechanism 13. The slide block fixing mechanism 13 is fixedly provided with a slide block.

In operation, first, the second drive mechanism 10 drives the slider fixing mechanism 13 to move rightward, giving room for the loading lead frame 28. The first driving mechanism 9 drives the lower slider 7 to move leftwards, so that the upper slider 6 jacks up the floating insert 8, and loads the lead frame 28, and at the moment, the end head of the floating insert 8 penetrates through the limit hole 29 of the lead frame 28 to fixedly limit the lead frame 28. Finally, the second driving mechanism 10 drives the slider fixing mechanism 13 to move leftwards, so that the slider fixing mechanism 13 drives the slider to move to the lead frame 28 with fixed limit, and one end of the lead frame 28 is inserted into the slider to complete assembly. After the assembly is completed, the first driving mechanism 9 drives the lower slider 7 to move rightward, so that the upper slider 6 moves downward with the floating insert 8 and exits from the limiting hole 29 of the lead frame 28; the second driving mechanism 10 drives the slider fixing mechanism 13 to move rightward, withdrawing the assembled lead frame 28 from the male die core 3.

Alternatively, as shown in fig. 2 and 4, the cross sections of the contact surfaces of the upper slider 6 and the lower slider 7 are respectively inclined in a zigzag shape, and the structural design can enable the lower slider 7 to move toward the leftmost end of the assembly cavity 5: the highest end of the zigzag shape of the lower slider 7 moves along the lowest end of the zigzag shape of the upper slider 6 toward the highest end of the zigzag shape of the upper slider 6 until reaching the leftmost end of the fitting cavity 5, the highest end of the zigzag shape of the lower slider 7 contacts the highest end of the zigzag shape of the upper slider 6, and the lower slider 7 is lifted up against the upper slider 6 so that the upper slider 6 moves upward.

When the lower slider 7 moves toward the rightmost end of the assembly chamber 5: the highest end of the zigzag of the lower slider 7 moves along the highest end of the zigzag of the upper slider 6 up to the lowest end of the zigzag of the upper slider 6 until reaching the rightmost end of the fitting cavity 5, the highest end of the zigzag of the lower slider 7 contacts the lowest end of the zigzag of the upper slider 6; the upper slider 6 is subjected to gravity to realize downward movement trend of the upper slider 6 along the structure of the lower slider 7.

Optionally, as shown in fig. 3, a first countersunk hole 30 and an assembly via hole 31 which are communicated are formed in the bottom of the floating insert 8 from bottom to top, the threaded end of the first shoulder screw 14 penetrates through the first countersunk hole 30 and the assembly via hole 31 to be screwed and fixed on the male die core 3, and the cup end of the first shoulder screw 14 is arranged in the first countersunk hole 30. When the upper slider 6 lifts the floating insert 8, the floating insert 8 is lifted upward with respect to the first shoulder screw 14. The outer circumference of the screw portion of the first shoulder screw 14 is fitted with a spring 15, and the inner diameter of the spring 15 is larger than the diameter of the fitting through hole 31. In the original state, the two ends of the spring 15 are respectively contacted with the end face of the floating insert 8 and the end face of the male die core 3. The height of the first counter bore 30 is set to be larger than the stroke displacement of the floating insert 8, and specifically, the difference between the height of the first counter bore 30 and the stroke displacement of the floating insert 8 floating up and down can be set to be 2 mm.

The spring 15 is arranged to prevent the upper slider 6 from moving downwards in time due to various factors such as frictional resistance when the lower slider 7 moves to the rightmost end of the assembly chamber 5; when the lower floating block 7 is pushed to the leftmost end of the assembly cavity 5, the upper floating block 6 is jacked up to move upwards, so that the spring 15 is in a compressed state; when the lower floating block 7 moves to the rightmost end, the jacking pressure disappears, the spring 15 is acted by the self elastic force to quickly push the upper floating block 6 to move downwards, the upper floating insert 8 can be ensured to quickly withdraw from the limiting hole 29 and retract into the channel 4, and therefore the overall working efficiency of the die structure is improved.

Optionally, as shown in fig. 3, 5 and 7, the present insert injection mold further includes a first guide block 16 and a second guide block 17. The first guide block 16 and the second guide block 17 are screwed on the left and right inner walls of the assembly chamber 5 by bolts. When assembled, the upper floating block 6 is inserted between the first guide block 16 and the second guide block 17, and plays a role in guiding the operation of the upper floating block. The first oil groove 27 is formed in the inner side of the first guide block 16, so that lubricating oil can infiltrate the upper slider 6 conveniently, and the running resistance of the upper slider 6 is reduced.

Optionally, as shown in fig. 3 and 5, the present insert injection mold further includes a first stopper 25, a second stopper 26, and a bottom plate 24. The first stopper 25 and the second stopper 26 are fitted on the left and right inner walls of the fitting chamber 5, respectively. I.e. in the assembly chamber 5 below with respect to the first guide block 16 and the second guide block 17. The bottom plate 24 is provided with a limiting block 23, the limiting block 23 is provided with a sliding groove, the outer side of the lower floating block 7 is in sliding connection with the sliding groove, so that the lower floating block 7 moves left and right relative to the sliding groove and is limited by a first stop block 25 and a second stop block 26. The second oil groove 33 is formed in the limiting block 23, lubricating oil conveniently enters the sliding groove through the second oil groove 33, and the sliding property of the lower floating block 7 relative to the sliding groove is improved.

Optionally, as shown in fig. 3 and 4, at least two positioning holes 18 are formed in the upper slider 6, and the cup end of the second shoulder screw 19 is retained in a second counterbore 32 in the upper slider 6. After the threaded end passes through the positioning hole 18, the threaded end is vertically screwed on the bottom plate 24 and the upper top end of the lower part male die 2, and the threaded end passes through the positioning hole 18 and is screwed in the bottom plate 24 and the lower part male die 2 below the bottom plate 24. On the one hand, the shank portion of the second shoulder screw 19 provides a guiding function for the upper slider 6 to move vertically up and down; on the other hand, the threaded end of the second shoulder screw 19 locks the bottom plate 24 to the lower male die 2, thereby fixing the bottom plate 24.

Optionally, the second guide block 17 is provided with an open first assembly groove 20, and the corresponding second stop block 26 is provided with an open second assembly groove 21. The first driving mechanism 9 includes a first cylinder 11, and the first cylinder 11 is installed at one side of the male mold. The first piston rod in the first cylinder 11 passes through the preset assembly hole of the lower male die 2, and enters the assembly cavity 5 through the first assembly groove 20 and the second assembly groove 21 to be connected with the lower floating block 7. When the first cylinder 11 drives the first piston rod to move left and right, the lower slider 7 moves left and right in a range between the first stopper 25 and the second stopper 26, and is limited by the chute, and moves linearly.

Optionally, an open clearance hole 22 is formed on the right side of the upper floating block 6, so that the first oil cylinder 11 can avoid through the clearance hole 22, and the disassembly and assembly can be completed quickly.

Example two

In combination with the first embodiment, the present application provides an assembly method of an insert injection mold, including:

step one: the floating insert 8 is fixed by screwing the first shoulder screw 14 with the spring 15 on the male die core 3, and the end of the floating insert 8 is arranged in the channel 4.

Step two: the first guide block 16, the second guide block 17, the first stop block 25 and the second stop block 26 are correspondingly arranged in the assembly cavity 5, the lower floating block 7 is inserted into a chute of a limiting block 23 on the bottom plate 24, and the upper floating block 6 is arranged above the lower floating block 7, is arranged in the assembly cavity 5 and is fixed through a second shoulder screw 19. While the second driving mechanism 10 can be assembled to the upper male mold 1.

Step three: then the first driving mechanism 9 is installed in the assembly hole in the lower male die 2, enters the assembly cavity 5 through the first assembly groove 20 and the second assembly groove 21, and is connected and fixed with the lower floating block 7 to complete assembly.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.

Claims

1. The insert injection mold is characterized by comprising a male mold, a first driving mechanism, an upper floating block and a lower floating block; the male die comprises an upper male die and a lower male die which are arranged up and down; the upper part male die is provided with a male die core; the male die core is provided with a longitudinally through channel, and the lead frame is correspondingly arranged on the male die core above the channel;

the upper floating block and the lower floating block are in up-down contact with each other and are arranged in an assembly cavity between the upper part male die and the lower part male die; a floating insert is arranged above the upper floating block in a contact manner, and the end head of the floating insert is arranged in the channel;

2. The insert injection mold of claim 1 further comprising a second drive mechanism; the second driving mechanism comprises a second oil cylinder and a sliding block fixing mechanism; the second oil cylinder is arranged on one side of the male die; the sliding block fixing mechanism is connected in the upper part male die in a sliding way; a second piston rod in the second oil cylinder penetrates through the upper part male die and is connected with the sliding block fixing mechanism; and when the second oil cylinder drives the second piston rod to move leftwards, one end of the lead frame is inserted into a sliding block on the sliding block fixing mechanism to finish assembly.

3. The insert injection mold of claim 1 wherein the cross-sections of the upper and lower slider contact surfaces are each in an inclined zig-zag shape; when the lower slider moves to the leftmost end of the assembly cavity, the highest end of the Z shape of the lower slider contacts with the highest end of the Z shape of the upper slider, so that the upper slider moves upwards; when the lower slider moves to the rightmost end of the assembly cavity, the highest end of the zigzag of the lower slider contacts the lowest end of the zigzag of the upper slider, causing the upper slider to move downward.

4. The insert injection mold of claim 1, wherein the bottom of the floating insert is provided with a first counter bore and an assembly via hole which are communicated from bottom to top; the threaded end of the first shoulder screw penetrates through the first countersunk hole and the assembly through hole to be screwed into the male die core, and the cup head end is arranged in the first countersunk hole; the spring is sleeved on the screw rod part of the first shoulder screw, and the inner diameter of the spring is larger than the diameter of the assembly through hole; two ends of the spring are respectively contacted with the end surfaces of the floating insert and the male die core; the height of the first counter bore is larger than the stroke displacement of the floating insert floating up and down.

5. The insert injection mold of claim 1 further comprising a first guide block and a second guide block; the first guide block and the second guide block are respectively fixed on the left and right inner walls of the assembly cavity and are used for guiding the upper floating block in the assembly cavity.

6. The insert injection mold of claim 5 further comprising a first stop, a second stop, and a bottom plate; the first stop block and the second stop block are respectively fixed on the left inner wall and the right inner wall of the assembly cavity, and the bottom plate is arranged between the first stop block and the second stop block; a limiting block is arranged on the bottom plate; the lower floating block is in sliding connection with a sliding groove on the limiting block.

7. The insert injection mold of claim 6 wherein the upper slider is provided with at least two locating holes; the cup head end of the second shoulder screw is limited and fixed in a second countersunk head hole on the upper floating block, and the threaded end penetrates through the positioning hole and is vertically screwed and fixed on the bottom plate and the lower part male die, so that the upper floating block moves up and down along the screw rod part of the second shoulder screw.

8. The insert injection mold of claim 6, wherein the second guide block is provided with an open first assembly groove and the second stop block is provided with an open second assembly groove.

9. The insert injection mold of claim 8 wherein the first drive mechanism comprises a first cylinder; the first oil cylinder is arranged on one side of the male die; a first piston rod in the first oil cylinder enters the assembly cavity through the first assembly groove and the second assembly groove to be connected with the lower floating block; when the first cylinder drives the first piston rod to move left and right, the lower floating block moves left and right in a range between the first stop block and the second stop block.

10. The insert injection mold of claim 9 wherein the right side of the upper slider is provided with an open clearance hole.