CN101352915B

CN101352915B - Mechanism scheme of side parting and forced stripper of injection mold

Info

Publication number: CN101352915B
Application number: CN200810215871XA
Authority: CN
Inventors: 鲍明飞
Original assignee: NINGHAI FIRST-RATE INJECTION MOULD Co Ltd
Current assignee: NINGHAI FIRST-RATE INJECTION MOULD Co Ltd
Priority date: 2008-09-03
Filing date: 2008-09-03
Publication date: 2010-12-01
Anticipated expiration: 2028-09-03
Also published as: CN101352915A

Abstract

The invention discloses a proposal of an injection mold side-parting forced demoulding mechanism, the mechanism consists of an outer sleeve (1), a traverse pin (2), a return pin (3), an inner core (4), a slide block (5), a spring (6) and a parting cylinder(7). The injection mold side-parting forced demoulding mechanism overcomes the defects of side-parting forced demoulding in the prior art such as complex mechanism, time-wasting and unreliable demoulding and high die cost; the technical proposal is as follows: one mechanism is adopted to divide the side-parting forced demoulding process intotwo independent serial action segments, and segment dividing and serialization are completed at one time, therefore, the injection mold side-parting forced stripping mechanism can achieve the advantages of simple structure, convenient manufacturing, quick and smooth demoulding, reliable operation and low cost. Meanwhile, the mechanism can be widely applied to an injection mold for the forced demoulding of a tubular characteristic opening at the side of a plastic product.

Description

The mechanism scheme of side parting and forced stripper of injection mold

Technical field

The present invention relates to the injection mold mould emptier, specifically be meant the mechanism scheme of a kind of side parting and forced stripper of injection mold that is used to solve plastic member product side tubulose feature oral area forced stripper mechanism.

Background technology

Prior art realizes forced stripper mechanism in the injection mold undercut, require to loose core with Angle Pin or hydraulic oil cylinder driving earlier before undercut, provides the required space of plastic member product strain, and then the beginning undercut.For example, the injection mold of oil cylinder is adopted in the action of loosing core, and consults Fig. 6, requires oil cylinder 06 action earlier of loosing core before the die sinking, extract mandrel out, send signal by travel switch afterwards, start die sinking, cover half 03, dynamic model 04 are separately, after the die sinking, undercut oil cylinder 7 begins action again, forces the somatotype demoulding; So, increased the time of die sinking, the demoulding, the mold actions complexity has increased unreliable factor simultaneously; Secondly, the structure of this action of loosing core (being to adopt Angle Pin or adopt oil cylinder) all can make the slide block volume of undercut increase, and causes die shape to increase the manufacturing cost height.Therefore, the side parting and forced stripper of prior art exists mechanism's complexity, the demoulding is time-consuming, unreliable, die cost is high deficiency.

Summary of the invention

Problems and shortcomings at above-mentioned prior art existence; the present invention adopts by overcoat; lateral pin; return pin; inner core; slide block; spring; the cover mechanism that the somatotype oil cylinder constitutes; side direction forced stripper mechanism process is decomposed into the action section of two the independent serials of afterwards taking out cover of loosing core earlier; finish the technical scheme of undercut overall process by disposable segmentation serial action; a kind of mechanism scheme of side parting and forced stripper of injection mold is provided; there is mechanism's complexity in the side parting and forced stripper that is intended to overcome prior art; the demoulding is time-consuming; unreliable; the deficiency that die cost is high reaches and makes the side parting and forced stripper of injection mold mechanism structure simple; the demoulding is quick; reliable; the purpose that reduces cost.

The object of the present invention is achieved like this: the mechanism scheme of side parting and forced stripper of injection mold comprises overcoat, lateral pin, return pin, inner core, slide block, spring, somatotype oil cylinder, wherein: described overcoat be steel, an end is provided with cylindrical tubular member step, hollow, its cylinder is provided with vertically the manhole by axis; Described lateral pin is the steel circular cylindrical rod-like members; Described return pin is the columnar component of steel, and its front end face shape and core contact position face match, and the tail end cylinder is provided with the through hole with its axis normal; Described inner core is step-like parts steel, that the square step of tail end and nose circle cylindricality are formed, the shape of its front end face shape and plastic member product is coincide, the center is provided with cylindrical hole and return pin is slidingly matched, tail end face is the inclined-plane consistent with the slide block back side, the cylinder middle front part is provided with the Long Circle through hole, and the length of Long Circle through hole is that inner core extraction stroke L adds the lateral pin diameter; Described slide block is parts steel, that slide in front and back on dynamic model, and the profile of its front end face and plastic member product is coincide, and is provided with step through-hole in corresponding plastic member product undercut position; Described spring is the compression spring that is enclosed within on the inner core; The hydraulically extensible element of described somatotype oil cylinder for constituting by cylinder body, piston, cylinder body is fixed on the dynamic model outer wall, and piston end and slider tail are plugged into.

Assembling (each member mutual alignment and relation):

Spring is inserted in inner core, overcoat step end compression spring is inserted in inner core, the return pin tail end is inserted the centre bore of inner core, pass the through hole of overcoat, the Long Circle through hole of inner core, the through hole of return pin with lateral pin, above-mentioned each parts are conspired to create an assembly, and wherein lateral pin is an interference fits with the cooperating of through hole of overcoat, return pin, with cooperating of Long Circle through hole of inner core be matched in clearance, under the effect of compression spring, elongation is L before overcoat and the return pin; With the step through-hole of this assembly, be fixed on the slide block with the counterbore screw from the rear end insertion slide block of slide block; The profile of slide block is towards core, and afterbody is plugged into by buckling with the piston end of somatotype oil cylinder.

Operation principle:

Mould is when the matched moulds state, the front end profile fit type core of slide block, at this moment, be contained in after the return pin of protracting in the inner core centre bore contacts core, drive through lateral pin, the L distance that contracts after the overcoat compression spring that protracts is synchronous, distance occurring between the step of the step of overcoat and slide block inner via hole is the neutral gear of L, lateral pin then by the front position slippage of Long Circle through hole to the rear end, with the fixed-site of overcoat; Injection moulding, cooling, die sinking is omitted; After the die sinking, somatotype oil cylinder pulling slide block retreats, and the demoulding divides two stages to carry out:

Phase I promptly retreats the distance segment to L, and slide block drives position outside the tubulose feature oral area that inner core retreats into plastic member product band shape convex tendon, and at this moment, under the effect of spring force, overcoat also drives return pin through lateral pin and still is pressed in original position to prop up plastic member product motionless.

Second stage, promptly retreat distance segment above L, at this moment, the step pulling overcoat of the step traction overcoat of slide block inner via hole retreats the ring-type convex tendon outer wall that breaks away from plastic member product, deviate from after the strain that contracts in the local generation of the ring-type convex tendon of plastic member product, thereby realize side parting and forced stripper, above-mentioned L distance is the stroke that inner core extracts, during design, decide by the position of the ring-type convex tendon of plastic member product and the length of tubulose feature.

In sum; the mechanism scheme of side parting and forced stripper of injection mold of the present invention; with side direction forced stripper mechanism process; be decomposed into two independently action sections of serial; segmentation; serial is disposable to be finished; the demoulding is smooth smoothly; simple in structure; easily manufactured; overcome mechanism's complexity of the side parting and forced stripper existence of prior art; the demoulding is time-consuming; unreliable; the deficiency that die cost is high reaches and makes the side parting and forced stripper of injection mold mechanism structure simple; the demoulding is quick; reliable; the purpose that reduces cost, simultaneously; injection mold for solving plastic member product side tubulose feature oral area forced stripper mechanism class has the meaning of pervasive popularization.

Description of drawings

Fig. 1 is the mechanism scheme matched moulds view of side parting and forced stripper of injection mold of the present invention;

Fig. 2 is that enlarged drawing is drawn in the part of Fig. 1;

Fig. 3 is the mechanism scheme die sinking tense schematic diagram of side parting and forced stripper of injection mold of the present invention;

Fig. 4 is that enlarged drawing is drawn in the tense part of loosing core the side parting and forced stripper phase I of Fig. 3;

Fig. 5 is that enlarged drawing is drawn in the side parting and forced stripper second stage of Fig. 3 tense part of loosing core;

Fig. 6 is that the injection mold structure schematic diagram of oil cylinder is adopted in the prior art action of loosing core.

Below in conjunction with the embodiment in the accompanying drawing the present invention is described in further detail, but should not be construed as any limitation of the invention.

Among the figure: overcoat 1, lateral pin 2, return pin 3, inner core 4, slide block 5, spring 6, somatotype oil cylinder 7, core 01, die cavity 02, cover half 03, dynamic model 04, plastic member product 05, the oil cylinder 06 of loosing core.

The specific embodiment

Consult Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, the mechanism scheme of a kind of side parting and forced stripper of injection mold of the present invention comprises overcoat 1, lateral pin 2, return pin 3, inner core 4, slide block 5, spring 6, somatotype oil cylinder 7, wherein: described overcoat 1 for steel, an end is provided with cylindrical tubular member step, hollow, its cylinder is provided with vertically the manhole by axis; Described lateral pin 2 is the steel circular cylindrical rod-like members; Described return pin 3 is the columnar component of steel, and its front end face shape and core 01 contact position face match, and the tail end cylinder is provided with the through hole with its axis normal; Described inner core 4 is step-like parts steel, that the square step of tail end and nose circle cylindricality are formed, the shape of its front end face shape and plastic member product 05 is coincide, the center is provided with cylindrical hole and return pin 3 is slidingly matched, tail end face is and consistent inclined-plane, slide block 5 back sides, the cylinder middle front part is provided with the Long Circle through hole, and the length of Long Circle through hole is that inner core 4 extraction stroke L add lateral pin 2 diameters; Described slide block 5 is parts steel, that slide in front and back on dynamic model 04, and the profile of its front end face and plastic member product 05 is coincide, and is provided with step through-hole in corresponding plastic member product 05 undercut position; Described spring 6 is for being enclosed within the compression spring on the inner core 4; The hydraulically extensible element of described somatotype oil cylinder 7 for constituting by cylinder body, piston, cylinder body is fixed on dynamic model 04 outer wall, and piston end and slide block 5 afterbodys are plugged into.

Assembling (each member mutual alignment and relation):

Spring 6 is inserted in inner core 4, overcoat 1 step end compression spring 6 is inserted in inner core 4, return pin 3 tail ends are inserted the centre bore of inner core 4, pass the through hole of overcoat 1, the Long Circle through hole of inner core 4, the through hole of return pin 3 with lateral pin 2, above-mentioned each parts are conspired to create an assembly, and wherein lateral pin 2 is an interference fits with the cooperating of through hole of overcoat 1, return pin 3, with cooperating of Long Circle through hole of inner core 4 be matched in clearance, under the effect of compression spring 6, elongation is L before overcoat 1 and the return pin 3; With the step through-hole of this assembly, be fixed on the slide block 5 with the counterbore screw from the rear end insertion slide block 5 of slide block 5; The profile of slide block 5 is towards core 01, and afterbody is plugged into by buckling with the piston end of somatotype oil cylinder 7.

Operation principle:

Mould is when the matched moulds state, the front end profile fit type core 01 of slide block 5, at this moment, be contained in after the return pin 3 of protracting in inner core 4 centre bores contacts core 01, drive through lateral pin 2, the overcoat 1 compression spring 6 that the protracts L distance that contracts synchronously occurs between the step of the step of overcoat 1 and slide block 5 inner via holes apart from being the neutral gear of L, 2 of lateral pins by the front position slippage of Long Circle through hole to the rear end, with the fixed-site of overcoat 1; Injection moulding, cooling, die sinking is omitted; After the die sinking, somatotype oil cylinder 7 pulling slide blocks 5 retreat, and the demoulding divides two stages to carry out:

Phase I, promptly retreat the distance segment to L, slide block 5 drives position outside the tubulose feature oral area that inner cores 4 retreat into plastic member product 05 band shape convex tendon, at this moment, under the effect of spring 6 elastic force, overcoat 1 also drives return pins 3 through lateral pin 2 and still is pressed in original position to prop up plastic member product 05 motionless.

Second stage, promptly retreat distance segment above L, at this moment, the step pulling overcoat 1 of the step traction overcoat 1 of slide block 5 inner via holes retreats the ring-type convex tendon outer wall that breaks away from plastic member product 05, deviate from after the strain that contracts in the local generation of the ring-type convex tendon of plastic member product 05, thereby realize side parting and forced stripper, above-mentioned L distance is the stroke that inner core 4 extracts, during design, decide by the position of the ring-type convex tendon of plastic member product 05 and the length of tubulose feature.

Claims

1. side parting and forced stripper of injection mold mechanism, comprise overcoat (1), lateral pin (2), return pin (3), inner core (4), slide block (5), spring (6), somatotype oil cylinder (7), it is characterized in that: described overcoat (1) for steel, an end is provided with cylindrical tubular member step, hollow, its cylinder is provided with vertically the manhole by axis; Described lateral pin (2) is the steel circular cylindrical rod-like members; Described return pin (3) is the columnar component of steel, and its front end face shape and core (01) contact position face match, and the tail end cylinder is provided with the through hole with its axis normal; Described inner core (4) is step-like parts steel, that the square step of tail end and nose circle cylindricality are formed, the shape of its front end face shape and plastic member product (05) is coincide, the center is provided with cylindrical hole and return pin (3) is slidingly matched, tail end face is and consistent inclined-plane, slide block (5) back side, the cylinder middle front part is provided with the Long Circle through hole, and the length of Long Circle through hole is that inner core (4) extraction stroke L adds lateral pin (2) diameter; Described slide block (5) is parts steel, that slide before and after dynamic model (04) is gone up, and the profile of its front end face and plastic member product (05) is coincide, and is provided with step through-hole in corresponding plastic member product (05) undercut position; Described spring (6) is for being enclosed within the compression spring on the inner core (4); The hydraulically extensible element of described somatotype oil cylinder (7) for constituting by cylinder body, piston, cylinder body is fixed on dynamic model (04) outer wall, and piston end and slide block (5) afterbody is plugged into; Described each member mutual alignment and pass are, spring (6) is inserted in inner core (4), overcoat (1) step end compression spring (6) is inserted in inner core (4), return pin (3) tail end is inserted the centre bore of inner core (4), pass the through hole of overcoat (1) with lateral pin (2), the Long Circle through hole of inner core (4), the through hole of return pin (3), above-mentioned each parts are conspired to create an assembly, wherein lateral pin (2) and overcoat (1), the cooperation of the through hole of return pin (3) is an interference fits, with the cooperating of Long Circle through hole of inner core (4) be matched in clearance, under the effect of compression spring (6), overcoat (1) and the preceding elongation of return pin (3) are L; With the step through-hole of this assembly, be fixed on the slide block (5) with the counterbore screw from the rear end insertion slide block (5) of slide block (5); The profile of slide block (5) is towards core (01), and afterbody is plugged into by buckling with the piston end of somatotype oil cylinder (7).