CN201389955Y - Twisting off device for large gates of injection molds - Google Patents

Twisting off device for large gates of injection molds Download PDF

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Publication number
CN201389955Y
CN201389955Y CN200920114479U CN200920114479U CN201389955Y CN 201389955 Y CN201389955 Y CN 201389955Y CN 200920114479 U CN200920114479 U CN 200920114479U CN 200920114479 U CN200920114479 U CN 200920114479U CN 201389955 Y CN201389955 Y CN 201389955Y
Authority
CN
China
Prior art keywords
gate
plate
cavity
cast gate
tooth bar
Prior art date
Application number
CN200920114479U
Other languages
Chinese (zh)
Inventor
陈昌盛
李过
Original Assignee
浙江凯华模具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江凯华模具有限公司 filed Critical 浙江凯华模具有限公司
Priority to CN200920114479U priority Critical patent/CN201389955Y/en
Application granted granted Critical
Publication of CN201389955Y publication Critical patent/CN201389955Y/en

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Abstract

A twisting off device for large gates of injection molds comprises an upper mold plate and a lower mold plate. A runner plate mounted under the upper mold plate is connected with a cavity fixing plate, a cavity insert is mounted in the cavity fixing plate, a gate hole is manufactured in the cavity insert, a gate bushing is mounted in the gate hole, an ejector pin mechanism and a core fixing plate are mounted on the lower mold plate, a core insert is mounted in the core fixing plate, the core insert and the cavity insert form a mold cavity, a molded product is arranged in the mold cavity, and the gate of the product is arranged in the gate bushing. The twisting off device is characterized in that a gear is mounted on the outer wall of the gate bushing, a rack is mounted on the cavity fixing plate, the rack is meshed with the gear, and the rack is connected with a power supply to drive the gear to rotate. The twisting off device overcomes the shortage that large gates of the existing injection molds can not be pulled away automatically and utilizes a method of twisting the gate bushing to twist off the gate approximately, then the gate can be pulled out of the gate bushing during mold opening, and the gate is easy to be pulled away after demolding, thereby saving time and labor and increasing production efficiency.

Description

The big cast gate of injection mold twists off device
Technical field
The utility model relates to injection mold, particularly relates to the device that twists off of the big cast gate of injection mold, belongs to the mould of plastics field.
Background technology
The plastic product that injection machine is produced is that material is injected in the mould, is shaped on gate orifice in mould, has cast gate on the product of moulding, cast gate need be removed.The size of cast gate is the size decision according to gate orifice, the gate orifice size needs big gate orifice with relevant, the big product of size of product, the speed of charging is fast like this, production time is short, raise the efficiency, but cast gate is also big, after the demoulding, it can't be broken, prior art is to cut off separately, has increased production process like this, has improved production cost.Special in the plastic that has added glass, it is just difficult more to cut cast gate.
Summary of the invention
The purpose of this utility model is in order to overcome the shortcoming of prior art, provide the sprue bush in a kind of mould to rotate, cast gate is reversed, be easy to cast gate is drawn with hand after making the demoulding, reduce manufacturing procedure, the big cast gate of injection mold of saving production cost twists off device.
The technical scheme that the big cast gate of the utility model injection mold twists off device is: comprise cope match-plate pattern and lower bolster, runner plate is installed below the cope match-plate pattern, runner plate connects impression bolster, mount type cavity insert in the impression bolster, be shaped on gate orifice in the cavity block, sprue bush is installed in the gate orifice, ejector pin mechanism and core fixing plate are installed on lower bolster, core are installed in the core fixing plate are inserted, core is inserted and cavity block constitutes die cavity, the product that moulding is arranged in the die cavity, the product cast gate is characterized in that sprue bush outer wall installation gear in sprue bush, tooth bar is installed on impression bolster, rack and pinion is meshed, and tooth bar connects the rotation of power driven gear.
The big cast gate of injection mold of the present utility model twists off device, after the product injection mo(u)lding, power drives tooth bar and slides, the gears engaged driven gear of tooth bar and sprue bush outer wall and sprue bush rotation are reversed the cast gate in the sprue bush, but are not turned round fully, also connect together a little, when die sinking, cast gate can be pulled out from sprue bush, behind the product stripping, be easy to pulling cast gate.The technical program overcomes the existing big cast gate of injection mold can not draw the shortcoming that falls automatically, and the mode that adopts sprue bush to reverse makes cast gate near twisting off, cast gate can be pulled out from sprue bush, be easy to after the demoulding cast gate is drawn, time saving and energy saving, enhance productivity.
The big cast gate of injection mold of the present utility model twists off device, and its described power can be oil cylinder, and the piston rod of oil cylinder connects tooth bar, and oil cylinder drives reliable in action.Its sprue bush is installed bearing outward, makes the sprue bush rotation smoothly, and gland is installed in gate orifice, and bearing contacts with gland, not with the impression bolster friction, reduces die wear.On its impression bolster wearing plate is installed, tooth bar is installed on the wearing plate, and tooth bar slides smoothly.
Description of drawings
Fig. 1 is the A-A schematic cross-section of Fig. 2;
Fig. 2 is that the big cast gate of the utility model injection mold twists off the device vertical view;
Fig. 3 is that the big cast gate of the utility model injection mold twists off the device stereogram.
The specific embodiment
The utility model relates to the big cast gate of injection mold and twists off device, as shown in Figure 1-Figure 3, comprise cope match-plate pattern 1 and lower bolster, runner plate 2 is installed below the cope match-plate pattern 1, runner plate 2 connects impression bolster 3, mount type cavity insert 4 in the impression bolster 3, be shaped on gate orifice 5 in the cavity block 4, sprue bush 6 is installed in the gate orifice, ejector pin mechanism and core fixing plate are installed on lower bolster, core are installed in the core fixing plate are inserted 15, core is inserted and 15 is constituted die cavitys with cavity block 4, the product that moulding is arranged in the die cavity, product cast gate 7 is characterized in that sprue bush 6 outer walls installation gear 8 in sprue bush 6, tooth bar 9 is installed on impression bolster 3, tooth bar 9 is meshed with gear 8, and tooth bar 9 connects 8 rotations of power driven gear.After the product injection mo(u)lding, power drives tooth bar 9 and slides, tooth bar 9 rotates with the gear 8 engagement driven gears 8 and the sprue bush 6 of sprue bush 6 outer walls, cast gate in the sprue bush 67 is reversed, but do not turn round fully, also connect together a little, when die sinking, cast gate 7 can be pulled out from sprue bush 6, behind the product stripping, be easy to pulling cast gate 7.The technical program overcomes the existing big cast gate of injection mold can not draw the shortcoming that falls automatically, and the mode that adopts sprue bush to reverse makes cast gate near twisting off, cast gate can be pulled out from sprue bush, be easy to after the demoulding cast gate is drawn, time saving and energy saving, enhance productivity.Its described power can be oil cylinder 12, and the piston rod 13 of oil cylinder 12 connects tooth bar 9, and oil cylinder drives reliable in action.Its sprue bush 6 outer bearings 10 of installing make the sprue bush rotation smoothly, and gland 11 is installed in gate orifice 5, and bearing 10 contacts with gland 11, not with the impression bolster friction, reduces die wear.Wearing plate 14 is installed on its impression bolster 3, and tooth bar 9 is installed on the wearing plate 14, and tooth bar slides smoothly.

Claims (4)

1, the big cast gate of injection mold twists off device, comprise cope match-plate pattern and lower bolster, runner plate is installed below the cope match-plate pattern, runner plate connects impression bolster, mount type cavity insert in the impression bolster, be shaped on gate orifice (5) in the cavity block, sprue bush (6) is installed in the gate orifice, ejector pin mechanism and core fixing plate are installed on lower bolster, core is installed in the core fixing plate to be inserted, core is inserted and cavity block constitutes die cavity, and the product of moulding is arranged in the die cavity, and product cast gate (7) is in sprue bush (6), it is characterized in that sprue bush (6) outer wall installation gear (8), go up installation tooth bar (9) at impression bolster (3), tooth bar (9) is meshed with gear (8), and tooth bar (9) connects power driven gear (8) rotation.
2, the big cast gate of injection mold as claimed in claim 1 twists off device, it is characterized in that described power is oil cylinder (12), and the piston rod (13) of oil cylinder (12) connects tooth bar (9).
3, the big cast gate of injection mold as claimed in claim 1 twists off device, it is characterized in that the outer bearing (10) of installing of sprue bush (6), and gland (11) is installed in gate orifice (5), and bearing (10) contacts with gland (11).
4, the big cast gate of injection mold as claimed in claim 1 twists off device, it is characterized in that upward installation wearing plate (14) of impression bolster (3), and tooth bar (9) is installed on the wearing plate (14).
CN200920114479U 2009-02-25 2009-02-25 Twisting off device for large gates of injection molds CN201389955Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200920114479U CN201389955Y (en) 2009-02-25 2009-02-25 Twisting off device for large gates of injection molds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200920114479U CN201389955Y (en) 2009-02-25 2009-02-25 Twisting off device for large gates of injection molds

Publications (1)

Publication Number Publication Date
CN201389955Y true CN201389955Y (en) 2010-01-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN200920114479U CN201389955Y (en) 2009-02-25 2009-02-25 Twisting off device for large gates of injection molds

Country Status (1)

Country Link
CN (1) CN201389955Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101954712A (en) * 2010-06-19 2011-01-26 凡嘉科技(无锡)有限公司 Adhesive opening separating structure of two-plate mold
CN102653124A (en) * 2012-05-24 2012-09-05 山西惠丰机械工业有限公司 Automatic cutting device of restrictive pouring gate of injection mold
CN102941657A (en) * 2012-10-30 2013-02-27 宁波双林模具有限公司 Shearing mechanism of annular sprue gate
CN103770284A (en) * 2012-10-24 2014-05-07 汉达精密电子(昆山)有限公司 Mechanism capable of automatically twisting stub bars
CN104802371A (en) * 2015-05-15 2015-07-29 耿晓冬 Flip-over type mold core glue feeding rack screw thread unloading pointed gate mold
CN104827038A (en) * 2015-05-18 2015-08-12 凯莱模具(深圳)有限公司 Rotary excision structure and excision method for sintered alloy molding injection water gap

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101954712A (en) * 2010-06-19 2011-01-26 凡嘉科技(无锡)有限公司 Adhesive opening separating structure of two-plate mold
CN102653124A (en) * 2012-05-24 2012-09-05 山西惠丰机械工业有限公司 Automatic cutting device of restrictive pouring gate of injection mold
CN103770284A (en) * 2012-10-24 2014-05-07 汉达精密电子(昆山)有限公司 Mechanism capable of automatically twisting stub bars
CN103770284B (en) * 2012-10-24 2016-03-09 汉达精密电子(昆山)有限公司 Automatically stub bar mechanism is twisted
CN102941657A (en) * 2012-10-30 2013-02-27 宁波双林模具有限公司 Shearing mechanism of annular sprue gate
CN102941657B (en) * 2012-10-30 2015-10-28 宁波双林模具有限公司 The cutting mechanism of circular gate
CN104802371A (en) * 2015-05-15 2015-07-29 耿晓冬 Flip-over type mold core glue feeding rack screw thread unloading pointed gate mold
CN104827038A (en) * 2015-05-18 2015-08-12 凯莱模具(深圳)有限公司 Rotary excision structure and excision method for sintered alloy molding injection water gap

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Granted publication date: 20100127