CN202088411U - Ejector - Google Patents

Abstract

The utility model discloses a demoulding mechanism, which comprises a female slider, a first sub-slider and a second sub-slider, wherein the first sub-slider is fixed on the front end surface of the female slider, the second sub-slider is sleeved on the first sub-slider in a sliding way, the front end of the second sub-slider exposes the first sub-slider, the tail end of the second sub-slider is connected with the front end surface of the female slider through a time-delay driving component, and the rear end surface of the female slider is provided with a pull rod; the utility model has the advantages of reasonable design, two sub-sliders are moved in stages, the adsorption area of the injection molding product is divided into two parts, the adsorption force between the sliders and the injection molding product is greatly reduced, the phenomenon that the injection molding piece is deformed due to the fact that the product is strained due to the sliding of the sliders is avoided, the mold stripping effect is good, and when the first sub-slider slides, the second sub-slider has the function of positioning the injection molding product, the problem that the injection molding product is adsorbed on the sliders is further avoided, and the product quality is ensured; in addition, the integral structure is simple, the die is suitable for various dies, the die structure is effectively simplified, and the die cost is reduced.

Description

Knock-out gear

Technical field

The utility model relates to technical field of mold, is specifically related to a kind of knock-out gear that is applied on the mould.

Background technology

Mould is an indispensable important equipment in the injection mo(u)lding.Injection mo(u)lding is with the plastic material of hot melt state being injected in the airtight molding space that has required form in the mould at a high speed, wait the plastic material cooling curing after, open mould the plastic cement machining object of solidifying ejected, to obtain the method for moulding product.Owing to injection molding forming method has the characteristics such as plastic cement products that the moulding expense is low, molding cycle short, forming process is simple and be easy to the forming shape complexity, therefore use very general in plastic cement products manufacturing field.

Along with improving constantly of scientific and technological level, people are also more strict to the requirement of product appearance quality.In the process of Design of Plastic Mould, usually product to eject direction consistent with the die sinking direction, but many times product has back-off in the cover half direction, the stripping direction of this position and die sinking direction are inconsistent, can not the demoulding, need do therefore that mould slide block or slanted kicking block loose core could the normal demoulding.More existing injection molds are when die sinking, moulding is adsorbed on mould or the die easily, and occur bending and deformation, some thin-walled parts such as notebook, phone housing particularly are because its length or width dimensions are bigger, and wall thickness is thinner, therefore intensity is relatively poor, and when die sinking, the back-off part very easily is adsorbed on the slide block on the injecting products, very easily pull goods and cause the moulding distortion, influence the quality of product.For this reason, solution is to increase ejecting mechanism is arranged on mould usually, though this method can be avoided the moulding distortion, owing to after being equipped with ejecting mechanism, causing mould structure complexity, volume heaviness, processing cost height and install loaded down with trivial details.

The utility model content

The purpose of this utility model is, at above-mentioned deficiency, provides a kind of simple and reliable for structure, the efficient height, be convenient to install and stripping result good, can effectively guarantee the knock-out gear of product quality.

For achieving the above object, technical scheme provided by the utility model is:

A kind of knock-out gear; it comprises female slide block, the first sub-slide block and the second sub-slide block; the described first sub-slide block is fixed on the front end face of described female slide block; the described second sub-slide block is slidingly located on the described first sub-slide block; and its front end allows this first sub-slide block expose; tail end is connected with the front end face of described female slide block by a time-delay driven unit; described time-delay driven unit just drives the second sub-slide block slip after allowing described female slide block drive the first sub-slide block slip certain distance, and the rear end face of described female slide block is provided with pull bar.Rational in infrastructure, be easy to processing, reduce cost.

Described time-delay driven unit comprises spring element and drive rod, the rear end face of described female slide block is provided with recess, the head of described drive rod is fixed on the described second sub-slide block, afterbody runs through described female slide block, and be provided with the hook part suitable in end after stretching into described recess certain distance with this recess, the position of corresponding described drive rod is provided with and the suitable cavity of described spring element appearance profile in the front end face of described female slide block, described spring element is inserted this cavity, and an end of this spring element is conflicted on the described second sub-slide block, and the other end is conflicted on described female slide block.Cooperate and stablize the reliability height.

Described spring element is spring or elastic rubber.Simple in structure, long service life.

The beneficial effects of the utility model are: the utility model reasonable in design, two sub-slide blocks are twitched stage by stage, realization will be divided into two with the adsorption area of injecting products, reduce the absorption dynamics between slide block and the injecting products greatly, avoid taking place pulling the phenomenon that goods cause the moulding distortion because of slide block slides, depanning is effective, and when the first sub-slide block slides, the second sub-slide block is motionless for the time being, function with location injecting products, further stop injecting products and be adsorbed on problem on the slide block, guarantee product quality; Overall structure is simple in addition, applicable to multiple kinds of molds, and effectively simplifies mould structure, reduces Mould design time and machining period, shortens opening period, reduces die cost.

Below in conjunction with accompanying drawing and embodiment, the utility model is further specified.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the decomposition texture schematic diagram of Fig. 1;

Fig. 3 is the complete section structural representation of Fig. 1.

The specific embodiment

Referring to Fig. 1; Fig. 2 and Fig. 3; a kind of knock-out gear that present embodiment provides; it comprises female slide block 1; the first sub-slide block 2 and the second sub-slide block 3; the described first sub-slide block 2 is fixed on the front end face of described female slide block 1; the described second sub-slide block 3 is slidingly located on the described first sub-slide block 2; and its front end allows this first sub-slide block 2 expose; tail end is connected with the front end face of described female slide block 1 by a time-delay driven unit 4; described time-delay driven unit 4 just drives second sub-slide block 3 slips after allowing described female slide block 1 drive the first sub-slide block 2 slip certain distances, and the rear end face of described female slide block 1 is provided with pull bar 5.In the utility model, just driving the second sub-slide block 3 after the distance with the first sub-slide block 2 design slip 10mm slides, among other embodiment, can come just to drive the second sub-slide block 3 after its distance of how long will sliding of respective settings according to the length that the first sub-slide block 2 exposes and slide, slide just to drive the second sub-slide block 3 after guaranteeing the first sub-slide block 2 and injecting products separating fully.Overall construction design is reasonable, the first sub-slide block 2 slides and the second sub-slide block 3 is twitched stage by stage, realization will be divided into two with the adsorption area of injecting products, reduce the absorption dynamics between slide block and the injecting products greatly, avoid taking place pulling the phenomenon that goods cause the moulding distortion because of slide block slides, depanning is effective, and when the first sub-slide block 2 slides, the second sub-slide block 3 is motionless for the time being, function with location injecting products, further stop injecting products and be adsorbed on problem on the slide block, guarantee product quality; Overall structure is simple in addition, applicable to multiple kinds of molds, and effectively simplifies mould structure, reduces Mould design time and machining period, shortens opening period, reduces die cost.

Described time-delay driven unit 4 comprises spring element 41 and drive rod 42, the rear end face of described female slide block 1 is provided with recess 11, the head of described drive rod 42 is fixed on the described second sub-slide block 3, afterbody runs through described female slide block 1, and stretch into behind described recess 11 certain distances in end and be provided with the hook part 43 suitable with this recess 11, in the utility model, because just driving the second sub-slide block 3 after the distance with the first sub-slide block 2 design slip 10mm slides, so the afterbody of drive rod 42 runs through described female slide block 1, and stretch into behind the described recess 1110mm just in end and be provided with the hook part 43 suitable with this recess 11.The position of corresponding described drive rod 42 is provided with and the suitable cavity 12 of described spring element 41 appearance profiles in the front end face of described female slide block 1, described spring element 41 is inserted this cavity 12, and an end of this spring element 41 is conflicted on the described second sub-slide block 3, and the other end is conflicted on described female slide block 1.Cooperate and stablize the reliability height.In the present embodiment, described spring element 41 is a spring, and among other embodiment, the object that this spring element 41 can adopt elastic rubber or other to have elastic force substitutes.Simple in structure, long service life.

During depanning, by the female slide block 1 of pull bar 5 pullings, female slide block 1 drives the first sub-slide block 2 and the second sub-slide block 3 simultaneously, but because under the spring element 41 elastic force effects of the second sub-slide block 3 in time-delay driven unit 4, and the recess on described female slide block 1 11 has certain distance apart with the hook part 43 of described drive rod 42, at the interior maintenance of this distance second motionless state that sub-slide block 3 continues and injecting products adsorbs mutually, to injecting products rise the location effect, avoiding injecting products to be adsorbed on the basis of the first sub-slide block 2, the realization slide block is twitched effect stage by stage, the first sub-slide block 2 is twitched earlier, compare in tradition one whole big slide block, the absorption dynamics between itself and the injecting products reduces greatly, avoids taking place pulling the phenomenon that goods cause the moulding distortion because of slide block slides, depanning is effective, guarantees product quality;

After described female slide block 1 drives the first sub-slide block 2 slip certain distances, promptly slide behind the 10mm, recess 11 on described female slide block 1 is conflicted at described drive rod 42 on hook part 43, driving the second sub-slide block 3 by this drive rod 42 then slides, because of the first sub-slide block 2 early separates with injecting products, the only surplus second sub-slide block 3 adsorbs mutually with injecting products, relative absorption dynamics also just reduces greatly, effectively avoid taking place pulling the phenomenon that goods cause the moulding distortion because of slide block slides, depanning is effective, guarantees product quality.

As described in the utility model the foregoing description, adopt structure same or analogous and the knock-out gear of other structure of obtaining, all in the utility model protection domain with it.

Claims (3)

1. A mold ejection mechanism, characterized in that it comprises a female slider, a first sub-slider and a second sub-slider, the first sub-slider is fixed on the front end of the female slider, and the The second sub-slider is slidingly sleeved on the first sub-slider, and its front end exposes the first sub-slider, and its tail end is connected to the front end of the female slider through a delay drive assembly, The time-delayed drive assembly allows the female slider to drive the first sub-slider to slide for a certain distance before driving the second sub-slider to slide, and the rear end surface of the female slider is provided with a pull rod. 2. The ejection mechanism according to claim 1, characterized in that: the delay driving assembly includes an elastic member and a driving rod, the rear end surface of the female slider is provided with a concave position, and the head of the driving rod Fixed on the second sub-slider, the tail part passes through the female slider, and after extending into the recess for a certain distance, a hook part matching the recess is provided at the end, corresponding to the position of the driving rod A cavity matching the profile of the elastic member is provided on the front end of the female slider, the elastic member is inserted into the cavity, and one end of the elastic member is in contact with the second sub-slider , and the other end is in contact with the female slider. 3. The ejection mechanism according to claim 2, wherein the elastic member is a spring or elastic rubber.

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