CN214448118U

CN214448118U - High-precision ejection injection mold

Info

Publication number: CN214448118U
Application number: CN202120157161.7U
Authority: CN
Inventors: 李荣洲; 谭沿河; 姚雅兰; 宾胜全
Original assignee: Dongguan Jingcai Optics Co ltd
Current assignee: Dongguan Jingcai Optics Co ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-10-22
Anticipated expiration: 2031-01-20
Also published as: TWM618673U

Abstract

The utility model provides a high-precision ejection injection mold, which comprises a lower liner plate, a lower die holder, a lower die plate, an upper die plate and an upper liner plate, wherein an injection runner is arranged in the lower die plate, a stripper plate is movably connected in the lower die holder, and a stripper needle and a jack post are fixed on the stripper plate; be equipped with first external member of inlaying in the lower bolster, first inlay the inside groove that compresses tightly that is equipped with of external member, the tank bottom that compresses tightly the groove is equipped with first spacing hole, sliding connection has lower mould benevolence in the first external member of inlaying, and lower mould benevolence is including fixed connection's lower cylinder, compact heap and last cylinder in proper order, lower cylinder and fore-set fixed connection, lower cylinder sliding connection in first spacing hole, compact heap sliding connection in compressing tightly the groove, the top of going up the cylinder is equipped with down the die cavity. When the utility model is reset after being ejected, the pressing block can realize close pressing contact with the pressing groove, and the accuracy of the position of the lower mold core after being reset can be effectively improved; the surface of the injection molding piece obtained by processing has no defects such as burrs, cracks and the like.

Description

High-precision ejection injection mold

Technical Field

The utility model relates to an injection mold specifically discloses an ejecting injection mold of high accuracy.

Background

The injection mold is important technological equipment for producing various industrial products, is a tool for producing plastic products, and is also a tool for endowing the plastic products with complete structures and accurate sizes. The injection molding specifically refers to injecting the heated and melted plastic into a mold cavity at high pressure by an injection molding machine, and obtaining a molded product injection molding piece after cooling and solidification.

In the prior art, an injection mold generally comprises an upper mold structure and a lower mold structure, a stripping ejection mechanism is arranged in the lower mold, and an ejector pin in the ejection mechanism is arranged at the bottom of a mold cavity, so that the defects of burrs and the like formed on the surface of an injection molded part obtained after injection molding are easily caused; in addition, in the process of ejection and reset, once the lifting structure deviates, the injection molding precision is seriously influenced, and finally the obtained injection molding piece can be scrapped.

SUMMERY OF THE UTILITY MODEL

Therefore, the injection mold capable of being ejected out with high precision is needed to be provided for solving the problems in the prior art, the ejection and reset actions are accurate and reliable, the injection precision can be effectively improved, and the surface of an injection molded part obtained by processing has no defects such as burrs, cracks and the like.

In order to solve the prior art problem, the utility model discloses a high-precision ejection injection mold, which comprises a lower backing plate, a lower die holder, a lower die plate, an upper die plate and an upper backing plate which are arranged in sequence, wherein an injection runner is arranged in the lower die plate, a stripping cavity is arranged in the lower die holder, a stripping plate is movably connected in the stripping cavity, and a stripping needle and a top post are fixed on the stripping plate;

the bottom of the runner of moulding plastics is connected with takes off the material hole, take off material needle sliding connection in taking off the material hole, be equipped with down in the lower bolster and inlay the hole, inlay down and be fixed with first inlay the external member in the hole, first inlay the inside groove that is equipped with of external member, the inner wall that compresses tightly the groove be with first inlay the inclined plane that becomes alpha contained angle between the external member center pin, 0 < alpha <90, the inside of first inlaying the external member is located to the inner wall ring that compresses tightly the groove, the tank bottom that compresses tightly the groove is equipped with first spacing hole, sliding connection has lower mould benevolence in the first external member of inlaying, the lower mould benevolence is including fixed connection's lower cylinder in proper order, compact heap and last cylinder, lower cylinder and fore-set fixed connection, lower cylinder sliding connection is in first spacing hole, compact heap sliding connection is in compressing tightly the groove, the top of going up the cylinder is equipped with can with the lower die cavity of the runner intercommunication of moulding plastics.

Furthermore, a second embedding piece located above the first embedding piece is fixed in the lower embedding hole, a second limiting hole is formed in the second embedding piece, and the upper column body is connected to the second limiting hole in a sliding mode.

Furthermore, the bottom of the upper template is provided with an upper embedding hole, an upper mold core is fixed in the upper embedding hole, and the bottom of the upper mold core is provided with an upper mold cavity positioned right above the lower mold cavity.

Furthermore, the bottom of the upper template is provided with a guide hole, and the lower template is fixed with a guide post which is connected with the guide hole in a sliding way.

Furthermore, cooling channels are arranged in the lower die base, the lower die plate, the upper die plate and the upper backing plate.

The utility model has the advantages that: the utility model discloses a high-precision ejecting injection mold, which is provided with a special lower mold core and an embedding piece structure, and through the inclined plane guide pressing effect, when the injection mold is reset after ejection, a pressing block of a lower mold core can realize close press contact with a pressing groove in an embedding piece, so that the accuracy of the position of the lower mold core after reset can be effectively improved, the lower mold core is prevented from deviating due to falling reset to influence the precision of an injection molding piece, and the injection molding precision can be effectively improved; the ejection action is realized by synchronous rising of the lower die core and the stripper pin, the uniformity of the ejection acting force can be effectively improved, the injection molding part can be prevented from being torn, the bottom of the lower die cavity has a hole-free structure, and the surface of the injection molding part obtained by processing has no defects of burrs, cracks and the like.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic cross-sectional view along a-a' in fig. 2.

Fig. 4 is an enlarged schematic structural diagram of B in fig. 3 according to the present invention.

Fig. 5 is a schematic structural view of the middle lower mold insert and the first insert member of the present invention.

The reference signs are: the injection molding device comprises a lower base plate 10, a lower die holder 20, a stripping cavity 21, a stripping plate 22, a stripping needle 23, a top column 24, a lower die plate 30, an injection molding runner 31, a stripping hole 32, a lower embedding hole 33, a first embedding piece 34, a pressing groove 341, a first limiting hole 342, a lower die core 35, a lower cylinder 351, a pressing block 352, an upper cylinder 353, a lower die cavity 354, a second embedding piece 36, a second limiting hole 361, a guide column 37, an upper die plate 40, an upper embedding hole 41, an upper die core 42, an upper die cavity 421, a guide hole 43, an upper base plate 50 and a cooling runner 60.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 to 5.

The embodiment of the utility model discloses a high-precision ejecting injection mold, including from the lower backing plate 10, lower bolster 20, lower bolster 30, upper die plate 40 and the upper backing plate 50 that supreme setting gradually down, be equipped with the runner 31 of moulding plastics in the lower bolster 30, be equipped with in the lower bolster 20 and take off the material chamber 21, the swing joint takes off flitch 22 in taking off the material chamber 21, takes off flitch 22 and can realize elevating movement in taking off the material chamber 21, takes off flitch 22 and is fixed with and takes off material needle 23 and fore-set 24;

the bottom of the injection molding runner 31 is connected with a stripping hole 32 penetrating through the lower template 30, the stripping needle 23 is slidably connected in the stripping hole 32, the ejection of plastic ribs in the material channel can be realized, the stability of the ejection stripping action is improved, the lower template 30 is provided with a lower insert hole 33, a first insert member 34 is fixedly embedded in the lower insert hole 33, a pressing groove 341 is arranged in the first insert member 34, as shown in fig. 4, the section of the pressing groove 341 is an isosceles trapezoid with the top length larger than the bottom length, the inner wall of the pressing groove 341 is an inclined plane forming an included angle of alpha with the central axis of the first insert member 34, alpha is more than 0 degrees and less than 90 degrees, namely, the included angle between the waist and the height of the isosceles trapezoid of the section of the pressing groove 341 is alpha, the inner wall ring of the pressing groove 341 is arranged in the first insert member 34, the groove bottom of the pressing groove 341 is provided with a first limit hole 342 penetrating through the first insert member 34, a lower insert 35 is slidably connected in the first insert member 34, the lower mold insert 35 includes a lower cylinder 351, a pressing block 352 and an upper cylinder 353 which are sequentially and fixedly connected from bottom to top, preferably, the lower cylinder 351, the pressing block 352 and the upper cylinder 353 are of an integrally formed structure, the lower cylinder 351 is fixedly connected with the top column 24, the lower cylinder 351 is slidably connected in the first limiting hole 342, as shown in fig. 4, the cross section of the pressing block 352 is also an isosceles trapezoid of which the top length is greater than the bottom length, an included angle between the waist and the height of the isosceles trapezoid of the cross section of the pressing block 352 is alpha, the pressing block 352 is slidably connected in the pressing groove 341, the shape and the size of the pressing block 352 are matched with those of the pressing groove 341, the pressing block 352 and the pressing groove 341 can form a tight guiding and contacting effect, and have good deviation prevention performance, and the top of the upper cylinder 353 is provided with a lower mold cavity 354 which can be communicated with the injection molding runner 31.

The utility model discloses after the compound die is moulded plastics and is accomplished, obtain the injection molding in the lower mould cavity 354, obtain the plastic rib material in the runner 31 of moulding plastics, take off flitch 22 and rise under ejection actuating mechanism's actuating action, the drive takes off material needle 23 and fore-set 24 and rises, fore-set 24 drives lower mould benevolence 35 and rises along first inlay spare 34, thereby push off the injection molding from lower bolster 30, meanwhile take off material needle 23 and rise along taking off hole 32 and push off the plastic rib material from runner 31 of moulding plastics synchronously, injection molding and plastic rib material obtain the effect of synchronous ejecting, can effectively improve the reliability of ejecting and taking off the material action, can improve the homogeneity of atress in the ejection process simultaneously, avoid causing the plastic rib material to cause the damage of dragging to the injection molding because of the atress is inhomogeneous; when the mold is closed again after ejection and stripping, the stripping plate 22 descends, the stripping needle 23 and the ejector pin descend synchronously, the lower mold core 35 descends in the first insert part 34 along with the ejector column 24, the pressing block 352 descends to be tightly attached to the pressing groove 341 to form a tight attaching effect, the positioning effect of the lower mold core 35 can be effectively improved, the lower mold cavity 354 is ensured to be accurate in position and communicated with the injection molding runner 31, the precision of the whole structure can be effectively improved, the lower mold core 35 is prevented from being offset in alignment during mold closing and injection molding, and the first limiting hole 342 limits the lower cylinder 351 to effectively improve the stability of lifting action; the injection molding directly realizes ejecting through lower mould benevolence 35, can effectively avoid locating die cavity 354 and lead to the injection molding to form defects such as burr because of the thimble.

In this embodiment, the second insert member 36 located above the first insert member 34 is further embedded and fixed in the lower insert hole 33, the second insert member 36 is provided with a second limiting hole 361, the upper cylinder 353 is slidably connected to the second limiting hole 361, so that the stability of the lifting action of the lower mold core 35 can be further improved, a gap is formed between the first insert member 34 and the second insert member 36, the pressing block 352 can move, the cross-sectional area of the second limiting hole 361 is smaller than the top area of the pressing block 352, that is, the pressing block 352 cannot be lifted away from the second insert member 36, and the stability of the ejection and stripping action can be effectively improved.

In this embodiment, the bottom of the upper mold plate 40 is provided with an upper insert hole 41, an upper mold core 42 is fixedly inserted into the upper insert hole 41, the bottom of the upper mold core 42 is provided with an upper mold cavity 421 located right above the lower mold cavity 354, and when the mold is closed, the upper mold cavity 421 and the lower mold cavity 354 form an injection mold cavity, so that an injection molded part with a specific shape structure can be obtained.

In this embodiment, the bottom of the upper mold plate 40 is provided with a guide hole 43, and the lower mold plate 30 is fixed with a guide post 37 slidably connected in the guide hole 43, so that the stability of the mold opening and closing action can be effectively improved through the guide hole 43 and the guide post 37.

In this embodiment, the lower die holder 20, the lower die plate 30, the upper die plate 40 and the upper backing plate 50 are all provided with cooling channels 60, and after the die assembly and the injection molding are completed, in the molding process, liquid for cooling, such as cold water, is introduced into the cooling channels 60, so that the efficiency of cooling molding can be effectively improved.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an ejecting injection mold of high accuracy, is including lower bolster (10), die holder (20), lower bolster (30), cope match-plate pattern (40) and the upper bolster (50) that set gradually, be equipped with in lower bolster (30) and mould plastics runner (31), be equipped with in die holder (20) and take off material chamber (21), swing joint has in taking off material chamber (21) takes off flitch (22), it takes off material needle (23) and fore-set (24) to be fixed with on flitch (22) to take off, its characterized in that:

the bottom of the injection molding runner (31) is connected with a stripping hole (32), the stripping needle (23) is connected in the stripping hole (32) in a sliding manner, a lower embedding hole (33) is arranged in the lower template (30), a first embedding piece (34) is fixed in the lower embedding hole (33), a pressing groove (341) is arranged in the first embedding piece (34), the inner wall of the pressing groove (341) is an inclined plane forming an alpha included angle with the central shaft of the first embedding piece (34), alpha is more than 0 and less than 90 degrees, the inner wall of the pressing groove (341) is annularly arranged in the first embedding piece (34), a first limiting hole (342) is arranged at the bottom of the pressing groove (341), a lower die core (35) is connected in the first embedding piece (34) in a sliding manner, and the lower die core (35) comprises a lower cylinder body (351), a pressing block (352) and an upper cylinder body (353) which are fixedly connected in sequence, the lower column body (351) is fixedly connected with the top column (24), the lower column body (351) is connected in the first limiting hole (342) in a sliding mode, the pressing block (352) is connected in the pressing groove (341) in a sliding mode, and the top of the upper column body (353) is provided with a lower die cavity (354) which can be communicated with the injection molding runner (31).

2. A high precision ejection injection mold as in claim 1, wherein: a second embedding piece (36) located above the first embedding piece (34) is further fixed in the lower embedding hole (33), a second limiting hole (361) is formed in the second embedding piece (36), and the upper column body (353) is connected to the second limiting hole (361) in a sliding mode.

3. A high precision ejection injection mold as in claim 1, wherein: an upper embedding hole (41) is formed in the bottom of the upper template (40), an upper mold core (42) is fixed in the upper embedding hole (41), and an upper mold cavity (421) located right above the lower mold cavity (354) is formed in the bottom of the upper mold core (42).

4. A high precision ejection injection mold as in claim 1, wherein: the bottom of the upper template (40) is provided with a guide hole (43), and the lower template (30) is fixed with a guide post (37) which is connected with the guide hole (43) in a sliding way.

5. A high precision ejection injection mold as in claim 1, wherein: and cooling flow channels (60) are arranged in the lower die base (20), the lower die plate (30), the upper die plate (40) and the upper backing plate (50).