CN110722742A

CN110722742A - Injection mold for producing thin-shell workpiece with inner core and outer core being pulled

Info

Publication number: CN110722742A
Application number: CN201910970142.3A
Authority: CN
Inventors: 张治安
Original assignee: DONGGUAN SHEN AN PLASTIC MOLD Co Ltd
Current assignee: DONGGUAN SHEN AN PLASTIC MOLD Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-01-24
Anticipated expiration: 2039-10-12
Also published as: CN110722742B

Abstract

The invention relates to the field of molds, in particular to an injection mold for producing a thin-shell workpiece with an internal and external loose core. The key points of the technical scheme are as follows: the front die comprises a front die base plate and a front die base, the rear die comprises a rear die base plate, two square irons and a rear die base, the two square irons are fixedly arranged at two side edges of the rear die base plate, each plate structure is the front die base plate, the front die base, the rear die base, the square irons and the rear die base plate from top to bottom in a diagram, and a first slide push plate and a second slide push plate are arranged between the two square irons. And a line position push plate hole is formed in the bottom plate of the rear die carrier. According to the injection mold for producing the thin-shell workpiece with the internal and external loose cores, the quality of the produced workpiece is good; the inner core pulling and the outer core pulling are carried out simultaneously, so that the working time is saved; compact structure, reasonable design and lower manufacturing cost of the die.

Description

Injection mold for producing thin-shell workpiece with inner core and outer core being pulled

Technical Field

The invention relates to the field of molds, in particular to an injection mold for producing a thin-shell workpiece with an internal and external loose core.

Background

The plastic shell of some equipment, for example the shell of computer host computer, the shell of cake machine, its volume is great, the wall thickness is thinner, there are more holes and mounted position to need to loose core and process, among the prior art, it is comparatively difficult to produce such work piece with the mould, adopt each board of shell to carry out injection moulding alone more, then the mode of assembling forms a whole shell, but the shell structural strength of such a mode integrated into one piece reduces to some extent, and still need carry out subsequent work of assembling during production, need more manpower, increase manufacturing cost.

Therefore, there is a need to design an injection mold for producing thin shell workpieces with internal and external loose cores to overcome the above problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an injection mold for producing an internal and external core-pulling thin-shell workpiece, which can be used for injection molding of a larger plastic shell with an internal and external core-pulling structure.

The technical purpose of the invention is realized by the following technical scheme: an injection mold for producing an internal and external core-pulling thin-shell workpiece comprises a front mold, a rear mold, a guide pillar, a thimble guide rod, an internal core-pulling mechanism, an external core-pulling mechanism and a thimble mechanism.

The front die comprises a front die frame base plate, a front die frame and a front die core, wherein the front die frame is arranged at the front die frame base plate, and the front die frame is provided with a containing cavity for containing the front die core.

The back mould includes back die carrier bottom plate, square iron, back die carrier and back mould benevolence, the square iron sets up two, two the fixed both sides that set up at back die carrier bottom plate of square iron, back die carrier sets up in one side that two square irons are not connected with back die carrier bottom plate, the thimble guide arm sets up between back die carrier and the back die carrier bottom plate, the back die carrier is provided with the mounting groove that supplies the installation of back mould benevolence, preceding mould benevolence with back mould benevolence is formed with the chamber of moulding plastics that is used for the work piece of moulding plastics when the mould compound die.

Thimble mechanism includes first capable position push pedal, the position push pedal of second line and thimble, first capable position push pedal the position push pedal of second line all sets up two between the square iron, first capable position push pedal, the position push pedal of second line all are provided with the hole of stepping down that supplies the thimble guide arm to pass, the thimble is fixed to be set up in first capable position push pedal, just the thimble passes the position push pedal of second line, back die carrier, back mould benevolence all are provided with the hole of sliding that supplies the thimble to slide ejecting work piece.

The internal core pulling mechanism comprises a fixed block and an internal core pulling block, the fixed block is fixedly arranged on a first line position push plate and penetrates a second line position push plate, the internal core pulling block is obliquely arranged and one end of the internal core pulling block is connected with the fixed block in a sliding mode, the sliding direction of the internal core pulling block is perpendicular to the opening and closing direction of the die, an inclined guide groove for the internal core pulling block to slide is formed in the rear die core and the rear die frame, the internal core pulling block is not connected with the fixed block and is arranged in an injection molding cavity when the die is closed, the internal core pulling block is used for processing a workpiece, and the internal core pulling block can be pulled out from the injection molding cavity under the combined action of the fixed block.

The outer core-pulling mechanism comprises an outer core-pulling block, a fixed seat and a guide block, wherein the guide block is vertically arranged on a front die frame bottom plate, one end of the outer core-pulling block is connected with the guide block in a sliding mode, one end, which is not connected with the guide block, of the outer core-pulling block is arranged in an injection molding cavity in a die closing state and used for machining an outer core-pulling block of a workpiece, and the outer core-pulling block can be pulled out of the injection molding cavity under the action of the guide block in die opening.

The guide post penetrates between the front die and the rear die and plays a role in guiding when the die opens and closes the film.

By adopting the technical scheme, the guide pillar has the function that the mold plays a guiding role in the film opening and closing process, the inner core-pulling mechanism is used for processing the inner core-pulling part of the workpiece, the outer core-pulling mechanism is used for processing the outer core-pulling part of the workpiece, and the ejector pin mechanism is used for ejecting the workpiece. When the whole mold is arranged on the injection molding machine, the film opening and closing device on the injection molding machine can control the opening and closing film of the mold.

The working principle of the inner core-pulling mechanism is that when the mold is opened, the first slide push plate and the second slide push plate move from the bottom plate of the rear mold frame to the direction of the rear mold frame, the inner core-pulling block moves along the inclined guide groove, meanwhile, one end of the inner core-pulling block is pulled out from the inner core-pulling position of the workpiece, the other end of the inner core-pulling block slides on the fixed block along the vertical direction of the mold opening, the core-pulling action is completed, and the core-pulling part in the workpiece is processed.

The outer core-pulling mechanism has the working principle that in the process of opening the mold, the guide block and the outer core-pulling block relatively slide, and at the moment, one end of the outer core-pulling block, which is not connected with the guide block in a sliding manner, is pulled out from the outer core-pulling position of the workpiece, so that the core-pulling action is completed, and the outer core-pulling part of the workpiece is processed.

The ejector pin mechanism has the working principle that when the mold is opened, the first row position push plate and the second row position push plate move forwards along the ejector pin guide rod, the ejector pin moves in the sliding hole, and after the inner core-pulling mechanism and the outer core-pulling mechanism complete core-pulling actions, the ejector pin can eject a workpiece out of the rear mold core.

The whole process is accurate, the inner core pulling and the outer core pulling are performed simultaneously, and production is greatly facilitated.

The invention is further configured to: a threaded guide post is arranged between the rear mould frame and the rear mould frame bottom plate, the first slide push plate and the second slide push plate are both provided with a rotating block, the rotating block is rotatably connected with the first slide push plate and the second slide push plate, and the threaded guide post is in threaded connection with the rotating block.

Through adopting above-mentioned technical scheme, at first line position push pedal and second line position push pedal at propulsive in-process, because the effect of screw thread guide pillar and turning block, the propulsive speed greatly slows down, plays sufficient cushioning effect, is favorable to promoting the whole quality of work piece.

The invention is further configured to: and a row position push plate hole is formed in the rear die carrier bottom plate.

By adopting the technical scheme, the slide push plate hole is used for a device for pushing the slide push plate to pass through.

The invention is further configured to: the front die frame is provided with a fixing block, the rear die frame is provided with two fixing blocks, and the fixing block is matched with the two fixing blocks and used for enhancing the positioning effect during die assembly.

Through adopting above-mentioned technical scheme, under fixed one and two fixed block combined action, can strengthen the positioning action when the compound die, because the casing work piece wall thickness of moulding plastics is thinner, the precision of location is especially important.

The invention is further configured to: the outer core pulling mechanism further comprises a reinforcing block, and the reinforcing block is arranged at the position of the guide block in a coating mode.

Through adopting above-mentioned technical scheme, the reinforcing block can play a reinforcing effect with the guide block cladding to the guide block.

The invention is further configured to: the mould is provided with a plurality of supporting legs.

Through adopting above-mentioned technical scheme, the setting of supporting legs for the mould can be placed comparatively simply on subaerial or transport vechicle.

The invention is further configured to: the outer core-pulling mechanism further comprises a slide pressing block, the slide pressing block is arranged on the rear die frame and provided with a guide block, the length direction of the guide block is perpendicular to the die opening direction of the die, the outer core-pulling block is provided with a guide groove, and the guide block is connected with the guide groove in a sliding mode.

By adopting the technical scheme, the slide pressing block can ensure the accuracy of the sliding direction of the outer core-pulling block, and further the quality of the produced product is improved.

The invention is further configured to: the mould is also provided with a locking component for locking the front mould frame and the rear mould frame together.

By adopting the technical scheme, when the die does not need to be used, the die can be locked through the locking assembly, and the die is convenient to store and transport.

The invention is further configured to: the mould is provided with a water cooling pipeline at each core pulling position.

Through adopting above-mentioned technical scheme, in thin shell mould production process, the temperature can not too high also can not hang down excessively, otherwise all can cause the reduction of work piece quality, especially the position of loosing core, and each position of loosing core all sets up the water-cooling pipeline and can guarantee to loose core the position bad phenomena such as burr not appearing.

The invention is further configured to: the thimble mechanism further comprises a flow channel thimble, one end of the flow channel thimble is fixedly arranged on the first line push plate, and the other end of the flow channel thimble is arranged at the gate.

By adopting the technical scheme, after the pouring of the pouring gate is finished, the plastic liquid can be remained in the flow channel at the pouring gate, and the pouring gate can be well ejected and removed through the flow channel ejector pin.

In conclusion, the invention has the following beneficial effects:

firstly, the quality of the produced workpiece is good;

secondly, the inner core pulling and the outer core pulling are carried out simultaneously, so that the working time is saved;

thirdly, the structure is compact, the design is reasonable, and the manufacturing cost of the die is low.

Drawings

FIG. 1 is a schematic structural view of a thin shell workpiece;

FIG. 2 is a schematic view of a thin shell workpiece from a bottom perspective;

FIG. 3 is a schematic view of the overall structure of the present embodiment;

FIG. 4 is another overall structure diagram of the present embodiment;

FIG. 5 is a schematic view showing a connection relationship between the front mold frame, the front mold core, the rear mold core and the rear mold frame in the present embodiment;

FIG. 6 is a schematic structural view of the front mold core according to the present embodiment;

FIG. 7 is another structural diagram of the front mold core according to the present embodiment;

FIG. 8 is a schematic mechanical diagram of the back mold core of the present embodiment;

FIG. 9 is another schematic view of the back mold insert of the present embodiment;

FIG. 10 is an assembled view of the first external core pulling mechanism of this embodiment with the front frame hidden;

FIG. 11 is a schematic structural view of a first external core-pulling mechanism according to the present embodiment;

FIG. 12 is an assembled view of the second external core pulling mechanism of this embodiment with the front frame hidden;

FIG. 13 is a schematic structural view of a second outer core pulling mechanism in the present embodiment;

FIG. 14 is a schematic structural view of a third external core-pulling mechanism according to the present embodiment;

FIG. 15 is a schematic structural view of an inner core-pulling mechanism in the present embodiment;

FIG. 16 is a schematic structural view of another internal core-pulling mechanism according to the present embodiment;

FIG. 17 is a schematic structural view of a rear mold in the present embodiment;

FIG. 18 is a schematic structural view of the rear mold of this embodiment with the rear mold frame hidden;

FIG. 19 is a schematic structural view of the ejector pin mechanism of the present embodiment;

FIG. 20 is a schematic view of the installation of the threaded post in this embodiment;

fig. 21 is a schematic structural view of the threaded guide post in this embodiment.

In the figure: 1. a thin shell workpiece; 1a, an outer core-pulling position; 1b, an inner core-pulling position; 2. a front mold frame; 3. a rear mould frame; 4. a front mold frame base plate; 5. square iron; 6. a rear mould base plate; 7. a first line push plate; 8. a second slide push plate; 9. a front mold core; 9a, a gate; 10. a rear mold core; 10a, an inclined guide groove; 10b, a sliding hole; 11. a guide post; 12. a guide block; 13. externally pulling out the core block; 13a, a bolt; 13b, a guide groove; 14. a fixed seat; 15. a reinforcing block; 16. drawing the core piece; 17. fixing one block; 18. fixing the two blocks; 19. internally pulling out the core block; 19a, an inner core-pulling machining station; 20. a fixed block; 21. supporting legs; 22. a locking block; 23. a thimble; 24. a flow passage thimble; 25. a thimble guide rod; 26. an auxiliary guide bar; 27. a threaded guide post; 28. rotating the block; 29. a hole of abdication; 30. a line position pressing block; 30a, guide blocks.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

In which like parts are designated by like reference numerals. It should be noted that the following description uses terms of orientation such as "front and back end," "left and right sides," "above," "below," and the like to refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" to refer to directions toward and away from, respectively, the geometric center of a particular component. In addition, the descriptions of "mounted on … …", "disposed on … …" and the like refer to two components having a certain connection and positional relationship, and do not refer to one component being on the upper surface of the other component. In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Referring to fig. 1 and 2, a thin-shell workpiece 1 is provided with a plurality of inner core-pulling positions 1b and a plurality of outer core-pulling positions 1a, and therefore, the thin-shell workpiece is difficult to process due to the fact that the thin-shell workpiece has a plurality of core-pulling structures and has an inner core-pulling structure and an outer core-pulling structure.

Referring to fig. 3 and 4, an injection mold for producing an internal and external core-pulling thin-shell workpiece 1 comprises a front mold and a rear mold, wherein the front mold comprises a front mold base plate 4 and a front mold base 2, the rear mold comprises a rear mold base plate 6, two square irons 5 and a rear mold base 3, the two square irons 5 are fixedly arranged at two side edges of the rear mold base plate 6, each plate structure is the front mold base plate 4, the front mold base 2, the rear mold base 3, the square irons 5 and the rear mold base plate 6 from top to bottom in a drawing, and a first slide push plate 7 and a second slide push plate 8 are arranged between the two square irons 5. And a row position push plate hole is formed in the rear die carrier bottom plate 6. The slide push plate hole is used for a device for pushing the slide push plate to pass through. When the whole mold is arranged on the injection molding machine, the film opening and closing device on the injection molding machine can control the opening and closing film of the mold.

Referring to fig. 3, the mold is provided with a plurality of support legs 21. The provision of the support feet 21 allows the mould to be placed on the ground or on a transport vehicle relatively simply.

Referring to fig. 4, the mold is further provided with a locking assembly for locking the front mold frame 2 and the rear mold frame 3 together. The locking assembly comprises a locking block 22 and a bolt, two ends of the locking block 22 are respectively locked on the front die frame 2 and the rear die frame 3 through the bolt, the locking function is achieved, when the die does not need to be used, the die can be locked through the locking assembly, and storage and transportation are convenient.

In addition, an inner core-pulling mechanism, an outer core-pulling mechanism and an ejector pin mechanism are arranged on the die, the inner core-pulling mechanism is used for processing an inner core-pulling position of the die, the outer core-pulling mechanism is used for processing an outer core-pulling position of the die, and the ejector pin mechanism is used for ejecting a formed workpiece.

Referring to fig. 5, the front mold further comprises a front mold core 9, the rear mold further comprises a rear mold core 10, the front mold base 2 is provided with an accommodating cavity for accommodating the front mold core 9, the rear mold base 3 is provided with a mounting groove for mounting the rear mold core 10, and the front mold core 9 and the rear mold core 10 form an injection molding cavity for injection molding of a workpiece when the mold is closed;

referring to fig. 6 and 7, the front mold core 9 is provided with a plurality of hole structures, some of which are used for communicating with a water cooling system, some of which are used for matching with an outer core-pulling mechanism to process an outer core-pulling part of a workpiece, and a sprue 9a connected with an injection port of the mold. In this embodiment, the mould all is provided with the water-cooling pipeline at every department of loosing core. In thin shell mould production process, the temperature can not too high nor can cross lowly, otherwise all can cause the reduction of work piece quality, especially the position of loosing core, and each position of loosing core all sets up the water-cooling pipeline and can guarantee to loose core the position bad phenomena such as burr not appearing.

Referring to fig. 8 and 9, the rear mold core 10 is provided with a plurality of inclined guide grooves 10a for cooperating with an inner core-pulling mechanism to process an inner core-pulling portion of a workpiece, and the rear mold core 10 is further provided with a sliding hole 10b for cooperating with an ejector pin mechanism to eject the workpiece.

Referring to fig. 3 and 10, the mold is provided with four guide posts 11, which are respectively located at four corners of the mold, penetrate through the front mold and the rear mold, and are used for guiding mold opening and mold closing of the mold. The front die frame 2 is provided with a fixed block 17, the rear die frame 3 is provided with two fixed blocks 18, and the fixed block 17 is matched with the two fixed blocks 18 and used for enhancing the positioning effect during die assembly. Under the combined action of the fixed block 17 and the fixed blocks 18, the positioning effect during mold closing can be enhanced, and the positioning accuracy is particularly important due to the fact that the wall thickness of the injection molding shell workpiece is thin. Note that the fixed block 17 and the fixed blocks 18 are provided in four directions of the mold.

Referring to fig. 4, 10 and 11, the first external core-pulling mechanism includes an external core-pulling block 13, a fixing seat 14, a guide block 12 and a reinforcing block 15, the external core-pulling block 13 is fixed on the front mold frame bottom plate 4 by bolts, the fixing seat 14 is fixed on the rear mold frame 3 by bolts, and the reinforcing block 15 is fixed on the front mold frame 2 by bolts. The reinforcing block 15 is arranged at the guide block 12 in a coating mode, the reinforcing block 15 can coat the guide block 12, a reinforcing effect is achieved on the guide block 12, and the guide block 12 can slide up and down relative to the reinforcing block 15. One end of the outer core-pulling block 13 is connected with the guide block 12 in a sliding manner, when the mold is closed, the end of the outer core-pulling block 13, which is not connected with the guide block 12, is arranged in the injection molding cavity, specifically, the core-pulling element 16 on the end extends into the injection molding cavity through the hole structure of the front mold core 9, the end is used for processing the outer core-pulling element of the workpiece, when the mold is opened, the outer core-pulling block 13 can be pulled out from the injection molding cavity under the action of the guide block 12, the core-pulling action is completed, and the processing of the outer core-pulling part of the workpiece is. As can be seen from the figure, the end of the outer core block 13 slidably connected to the guide block 12 is slidably moved relative to the guide block by means of an inclined T-shaped sliding slot and an inclined T-shaped sliding block, such that the outer core block 13 can be extracted from the injection cavity by such sliding movement.

Referring to fig. 4, 12 and 13, in order to adapt to the shape processing requirement of the workpiece, a second external core-pulling mechanism is also arranged at the mould, and the external core-pulling mechanism also comprises an external core-pulling block 13, a fixed seat 14, guide blocks 12 and reinforcing blocks 15, the difference is that one reinforcing block 15 covers and fixes three guide blocks 12, and the core-pulling piece 16 on the external core-pulling block 13 has different shapes because the workpiece has different shapes to be processed at the position. Furthermore, as can be seen from fig. 13, the core piece 16 is locked by the outer core block 13 by means of the latch 13a, and when the core piece 16 needs to be replaced, the latch 13a can be pulled out for replacement. The fixing base 14 of the outer core-pulling mechanism is arranged on the front mould frame 2. The outer core-pulling mechanism can complete the outer core-pulling action when the front mould frame 2 is separated from the front mould frame 2.

The working principle of the two external core-pulling mechanisms is that in the process of opening the mold, the guide block 12 and the external core-pulling block 13 relatively slide, and at the moment, one end of the external core-pulling block 13, which is not connected with the guide block 12 in a sliding manner, is pulled out from the external core-pulling position of the workpiece, so that the core-pulling action is completed, and the processing of the external core-pulling part of the workpiece is realized.

Referring to fig. 14, some of the external core pulling mechanisms of the present invention further include a slide pressing block 30, the slide pressing block 30 is disposed on the rear mold frame 3, the slide pressing block 30 is provided with a guide block 30a, a length direction of the guide block 30a is perpendicular to a mold opening direction of the mold, the external core pulling block 13 is provided with a guide groove 13b, and the guide block 30a is slidably connected with the guide groove 13 b. The slide pressing block 30 can ensure the accuracy of the sliding direction of the outer core-pulling block 13, thereby being helpful for improving the quality of the produced product.

Referring to fig. 15 and 16, the inner core pulling mechanism includes a fixed block 20 and an inner core pulling block 19, the fixed block 20 is fixedly disposed on the first slide pushing plate 7 and passes through the second slide pushing plate 8, the inner core pulling block 19 is disposed obliquely, and one end of the inner core pulling block is connected with the fixed block 20 in a sliding manner, the sliding direction is perpendicular to the mold opening and closing direction, the rear mold core 10 and the rear mold frame 3 are both provided with an inclined guide groove 10a for sliding the inner core pulling block 19, in a mold closing state, the end of the inner core pulling block 19, which is not connected with the fixed block 20, is disposed in the injection molding cavity for processing the inner core pulling of the workpiece, and in a mold opening state, the inner core pulling block 19 can be pulled out of the injection molding cavity under the combined action of the fixed block.

Referring to fig. 17 and 18, when the mold is opened, the first row push plate 7 and the second row push plate 8 move from the bottom plate 6 of the rear mold frame to the direction of the rear mold frame 3, and the inner core-pulling block 19 moves along the inclined guide groove 10a, meanwhile, one end of the inner core-pulling block 19, which is connected with the fixed block 20 in a sliding manner, slides along the vertical direction of the mold opening, the rear mold core 10 moves a small distance away from the direction of the rear mold frame 3 under the action of the six inner core-pulling blocks 19, the inner core-pulling machining position 19a of the inner core-pulling block 19 is pulled out from the inner core-pulling position of the workpiece, the core-pulling action is completed, and the processing.

Referring to fig. 17 and 19, the ejector pin mechanism includes a first row position push plate 7, a second row position push plate 8, an ejector pin guide rod 25, an auxiliary guide rod 26, an ejector pin 23, and a runner ejector pin 24, and one end of the runner ejector pin 24 is fixedly disposed on the first row position push plate 7, and the other end is disposed at the gate 9 a. After the pouring of the gate 9a is finished, the plastic liquid is remained in the runner at the gate 9a, and the runner 9a can be well ejected and removed through the runner ejector pin 24. The thimble guide rod 25 is arranged between the rear mould frame 3 and the rear mould frame bottom plate 6, and the first line position push plate 7 and the second line position push plate 8 are both provided with abdicating holes 29 for the thimble guide rod 25 to pass through. The auxiliary guide rods 26 penetrate through the four corners of the first row position push plate 7 and the second row position push plate 8 and are used for enhancing the guiding effect. The ejector pins 23 are fixedly arranged on the first row position push plate 7, the ejector pins 23 penetrate through the second row position push plate 8, and referring to fig. 8, the rear die frame 3 and the rear die core 10 are both provided with sliding holes 10b for the ejector pins 23 to slide and eject workpieces. The ejector pin mechanism can eject the workpiece out after demolding.

The working principle of the ejector pin mechanism is that when the mold is opened, the first row position push plate 7 and the second row position push plate 8 move forwards along the ejector pin guide rod 25, the ejector pin 23 moves in the sliding hole 10b, and after the inner core-pulling mechanism and the outer core-pulling mechanism complete core-pulling actions, the ejector pin 23 can eject a workpiece out of the rear mold core 10. The whole process of the die for producing the workpiece is accurate, the inner core pulling and the outer core pulling are performed simultaneously, and production is greatly facilitated.

Referring to fig. 17, 20 and 21, a threaded guide post 27 is arranged between the rear mold frame 3 and the rear mold frame bottom plate 6, the first row position push plate 7 and the second row position push plate 8 are both provided with a turning block 28, the turning block 28 is rotatably connected with the first row position push plate 7 and the second row position push plate 8, and the threaded guide post 27 is in threaded connection with the turning block 28. In the process of pushing the first row position push plate 7 and the second row position push plate 8, due to the effects of the threaded guide post 27 and the rotating block 28, the pushing speed is greatly reduced, a sufficient buffering effect is achieved, and the whole quality of a workpiece is favorably improved.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a production thin shell work piece injection mold of loosing core inside and outside which characterized in that: the core pulling mechanism comprises a front die, a rear die, a guide post (11), a thimble guide rod (25), an inner core pulling mechanism, an outer core pulling mechanism and a thimble mechanism;

the front mould comprises a front mould base plate (4), a front mould base (2) and a front mould core (9), the front mould base (2) is arranged at the front mould base plate (4), and the front mould base (2) is provided with an accommodating cavity for accommodating the front mould core (9);

the rear die comprises a rear die frame bottom plate (6), two square irons (5), a rear die frame (3) and a rear die core (10), the number of the square irons (5) is two, the two square irons (5) are fixedly arranged on two sides of the rear die frame bottom plate (6), the rear die frame (3) is arranged on one side, which is not connected with the rear die frame bottom plate, of the two square irons (5), the ejector pin guide rod (25) is arranged between the rear die frame (3) and the rear die frame bottom plate (6), the rear die frame (3) is provided with a mounting groove for mounting the rear die core (10), and an injection molding cavity for injection molding of a workpiece is formed between the front die core (9) and the rear die core (10) when the die is closed;

the ejector pin mechanism comprises a first line position push plate (7), a second line position push plate (8) and ejector pins (23), the first line position push plate (7) and the second line position push plate (8) are arranged between the two square irons (5), the first line position push plate (7) and the second line position push plate (8) are respectively provided with an abdicating hole (29) for an ejector pin guide rod (25) to pass through, the ejector pins (23) are fixedly arranged on the first line position push plate (7), the ejector pins (23) pass through the second line position push plate (8), and the rear die frame (3) and the rear die core (10) are respectively provided with a sliding hole (10b) for the ejector pins (23) to slide and eject workpieces;

the inner core-pulling mechanism comprises a fixed block (20) and an inner core-pulling block (19), the fixed block (20) is fixedly arranged on a first row position push plate (7), a second row position push plate (8) is arranged, the inner core-pulling block (19) is obliquely arranged, one end of the inner core-pulling block is connected with the fixed block (20) in a sliding mode, the sliding direction is perpendicular to the mold opening and closing direction, inclined guide grooves (10a) for the inner core-pulling block (19) to slide are formed in a rear mold core (10) and a rear mold frame (3), one end, which is not connected with the fixed block (20), of the inner core-pulling block (19) is arranged in an injection molding cavity in a mold closing state and used for machining an inner core of a workpiece, and the inner core-pulling block (19) can be pulled out of the injection molding cavity under the combined action of the fixed block (20) and the inclined guide;

the outer core-pulling mechanism comprises an outer core-pulling block (13), a fixed seat (14) and a guide block (12), wherein the guide block (12) is vertically arranged on a front die frame bottom plate (4), one end of the outer core-pulling block (13) is connected with the guide block (12) in a sliding mode, one end, which is not connected with the guide block (12), of the outer core-pulling block (13) is arranged in an injection molding cavity in a die closing state and is used for processing the outer core-pulling of a workpiece, and the outer core-pulling block (13) can be pulled out of the injection molding cavity under the action of the guide block (12) in the die opening process;

the guide post (11) penetrates between the front die and the rear die and plays a role in guiding when the die opens and closes the film.

2. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: a threaded guide post (27) is arranged between the rear die carrier (3) and the rear die carrier bottom plate (6), the first line position push plate (7) and the second line position push plate (8) are both provided with a rotating block (28), the rotating block (28) is rotatably connected with the first line position push plate (7) and the second line position push plate (8), and the threaded guide post (27) is in threaded connection with the rotating block (28).

3. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: and a slide push plate hole is formed in the rear die carrier bottom plate (6).

4. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: the mould is characterized in that a fixed block (17) is arranged on the front mould frame (2), two fixed blocks (18) are arranged on the rear mould frame (3), and the fixed block (17) is matched with the two fixed blocks (18) and used for enhancing the positioning effect during mould closing.

5. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: the outer core pulling mechanism further comprises a reinforcing block (15), and the reinforcing block (15) is arranged at the guide block (12) in a cladding mode.

6. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: the mould is provided with a plurality of supporting legs (21).

7. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: the outer core pulling mechanism further comprises a slide pressing block (30), the slide pressing block (30) is arranged on the rear die frame (3), the slide pressing block (30) is provided with a guide block (30a), the length direction of the guide block (30a) is perpendicular to the die opening direction of the die, the outer core pulling block (13) is provided with a guide groove (13b), and the guide block (30a) is connected with the guide groove (13b) in a sliding mode.

8. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: the mould is also provided with a locking component for locking the front mould frame (2) and the rear mould frame (3) together.

9. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: the mould is provided with a water cooling pipeline at each core pulling position.

10. The injection mold for producing the thin-shell workpiece with the internal and external loose cores as claimed in claim 1, wherein: the thimble mechanism further comprises a runner thimble (24), one end of the runner thimble (24) is fixedly arranged on the first line position push plate (7), and the other end of the runner thimble (24) is arranged at the position of the sprue (9 a).