CN1101886A - Once-shaped antiforge plastic container cover - Google Patents

Abstract

This one-pass shaped plastic cover for bottle, jar or keg can indicate if it has been opened. The cover body is connected via very thin and easily broken ring-shape film and top runner rib with locking ring that has stop body to clip neck of container. When the cover is opened, the thin film must be broken off .Its advantages include simple structure of mould, easy demoulding and easy mounting the cover.

Description

Once-shaped antiforge plastic container cover

The invention belongs to a kind of container cover that can indicate that container had been unlocked.

Document CN 91230090.6U and CN 87100398A disclose two kinds of plastics Forgery-proof bottle lids, its lid lower end links to each other with the lock ring that has block body by easily broken connecting strap, twist-off closure makes the connecting strap fracture because of its block body blocks the bottleneck projection, stays the mark that bottle cap was unlocked.Its weak point is: between the former the described bottle cap per two easily broken connecting straps is the space, the punch of mould is in this space and die friction when making bottle cap, and it is bigger to wear and tear, and easily forms the slit, plastics pierce and produce fitfull " overlap ", influence the product design of bottle cap and attractive in appearance; The described block 17 of the former the described support piece 11 and the latter and must use the manufacturing of Hough formula mold injection at the formed connector of lid lateral surface upper groove.And the Hough mould is suitable for the demoulding of many plastics of the single-piece plastic in monotype chamber or one-rank a plurality of die cavities, then demoulding inconvenience or structure are too complicated for many plastics of a plurality of die cavities of multi-row, are unfavorable for using the injection machine of big shot to produce in enormous quantities and cost-cutting.

The invention is the follow-up improvement of applicant's above-mentioned CN 91230090.6U patent application, goal of the invention is to avoid the weak point in the above-mentioned document and provides a kind of anti-counterfeit container that is more suitable for the new construction of one piece injection mo(u)lding of making in enormous quantities to cover, to simplify the structure of mould, prolong die life, improve the quality of products and aesthetic property, save injection raw material, reduce mould-manufacturing and lid production cost, expand this lid Applicable scope.And further make the demoulding, encapsulation, the leak tightness of this lid and open easier, reliable.

The purpose of foregoing invention adopts following technical measures to realize:

This kind anti-counterfeit container lid, bottle cap particularly, make by semi-rigid material, for example be that plastics and so on material is made, lid skirt by caping, inner side mounting thread, form by easily broken connector and the lock ring that the lid skirt is connected as a single entity, the lock ring medial surface is provided with the block body with whole lid single injection-molded, this block body is that inboard upper and lower end face is the continuous of inclined-plane or is interrupted the circular protrusion thing, the upper surface of this lock ring is bevelled inclined-plane, inside below, this easily broken connector is the annular membrane body, and it has the long thickness of a semi-ring at least between 0.06 to 0.35 millimeter.

The external diameter of above-mentioned lid skirt is less than or equal to the external diameter of annular membrane body, and the external diameter of annular membrane body is less than or equal to the external diameter of lock ring.

The vinyl cover of structure as mentioned above, as long as design-calculated lid skirt and lock ring are not very thick, just very be suitable for the concavo-convex board-like mould single injection-molded of a plurality of die cavities of multi-row: at first, because the above-mentioned design of lid skirt external diameter, annular membrane body and lock ring external diameter, lid is easy to directly deviate from vertically from the die cavity of die unobstructedly; Secondly, owing to set on the semi-rigid radial elastic that produces of its material and lock ring, the block body and the own dilatancy that the inclined-plane had of screw thread, and but the annular membrane body is because of the thin softness folding endurance that has, and makes lid be easy to axially eject by force from punch core upper edge (push rod and push pedal synchronization action).In addition, this covers when being encapsulated into vessel port, also because of above-mentioned former thereby be convenient to directly be pressed into vertically vessel port; During unlatching,, when the lid skirt is raise by turn, break annular membrane body over half the most at last and leave vessel port, and then lid is broken in two, stay the breakage sign that was unlocked because of the block body on the lock ring is blocked by the projection of container neck.

The vinyl cover of said structure, if when the annular membrane body has the above thickness of half-turn all above 0.35 millimeter then be difficult for breaking, thickness then is difficult for making less than 0.06 millimeter.But as improve the making precision of mould, when the thickness of the whole circle of annular membrane body all was controlled at 0.13 ± 0.5 millimeter, this thin-film body was very easily broken when uncapping and easy injection-molded.

When the whole circle of annular membrane body film was all very thin, because the binding force of the both sides mold wall of film, the plastics of molten were difficult to flow through from intermembranous, so the part on film both sides generally should be established cast gate respectively.In order to reduce cast gate (for example two cast gates on caping and the lock ring being subtracted into) on the mould to simplify the structure of mould, and the tailing in the minimizing mold runner (half the tailing that is about the bottle cap materials) with cost-cutting, can be provided with cast gate body on the film on the annular membrane body.But the reinforcement on the film on the cast gate body annular membrane body, total film thickness of this reinforcement (being the thickness that former thin-film body thickness adds reinforcement) and arc length thereof all should be greater than 0.15 millimeters.The cast gate body also is distributed on the annular membrane body in the half-turn of thin-film body longitudinally an above thickness and arc length all greater than cast gate muscle on 0.2 millimeter the film on the film.Melting charge promptly is easy to thus the cast gate body and flows to lock ring from the lid skirt, perhaps reverse direction flow.

As material is from the lid skirt when flowing to lock ring, and the lower surface that preferably will cover skirt is made as the inclined-plane, forms exit skirt, enters the pressure in annular membrane tagma with the increase melting charge, is convenient to make thin-film body as thin as a wafer.

Said structure, both be suitable for block body and enclosed the lid of internal diameter c more than or equal to lid skirt internal diameter a, also be suitable for the lid of c less than a, but lid for c＜a, its block body medial surface (plane or curved surface) vertically wide on the lid skirt ridge loose, to reduce that lid block body when the punch core ejects falls into thread groove and the friction drag in the core threaded area that produces reduces the possibility that very thin annular membrane body is broken when the demoulding.

In order to be more conducive to the demoulding and encapsulation the time is pressed into vessel port, lid can design thinlyyer, to increase its radial elastic.At this moment, Yi Xie Vertical bar shaped load muscle is set on the skirt, can reduce the axial strength of lid, the axle pressure when bearing capping at lid; It is few that the injection molding material that the load muscle spent is set, so effect and the anti-skidding line of double as screw capping that the load muscle still can be received the joint material are set.At this moment, also can force-bearing ring be set, transmit the axial thrust of covering when mould ejecting mechanism and encapsulation are pressed between skirt and lock ring by this force-bearing ring (this moment, the annular membrane body was bent folding) better at lid skirt lower end or lock ring upper end.

Force-bearing ring is for the container cover particular importance of lid skirt external diameter less than lock ring external diameter or internal diameter.

Lock ring is difficult for crossing the container neck projection and is drawn out when uncapping for making, and the lock ring intensive aspect can be set to increase the coupling mechanism force of lock ring, and this intensive aspect can be located at the lateral surface or the medial surface of lock ring, and perhaps inside and outside two sides are provided with simultaneously.

For increasing the leak tightness of said vesse lid, the lid skirt seal ring of a circle or multi-turn projection also can be set at lid skirt medial surface, the seal ring internal diameter of this projection is slightly less than the vessel port external diameter; Also can be provided with in the caping lower end with the lid skirt concentric, can fill in the caping seal ring in the vessel port, this encircles external diameter should be slightly larger than the vessel port internal diameter; Also a part can be covered the skirt internal diameter in addition and design to such an extent that be slightly less than the vessel port external diameter and reach the leak free effect, also receive the effect of easy molding and material-saving so simultaneously as lid skirt sealing member.

Compared with the prior art, this lid has following advantage: designed structure has made full use of the semi-rigid characteristics of material, the Hough formula mould of horizontal folding that need not be complicated, only use the concavo-convex board-like mould of the single Vertical of letter to folding, the demoulding ejects and needn't screw out (ejecting than screwing out the efficient height), can realize the integral injection moulding fast in enormous quantities in many types of chamber.The mutual friction of concavo-convex mould has been avoided in the setting of annular membrane body, makes mould durable in use, there is no " overlap ", has improved the quality and the aesthetic property of product; The cast gate body is provided with the cast gate number (each die cavity will lack at least) of half at least that has reduced mould on the film; The minimizing of cast gate and then make the die joint of mould and the template number obtains reducing and (for example saves the caping cast gate and can economize die joint that reaches this cast gate tailing and the template of forming this die joint, become two die sinkings and be single die sinking), thereby mould structure and weight have been simplified, so that injection machine one mould of big shot is once made several and even tens lids, and saved the runner tailing of half; The block body medial surface vertically is wider than and covers the loose design of skirt ridge and make the block body internal diameter less than lid skirt internal diameter container cover (false proof bottle class is used in a large number) also ejection device easily, has expanded the Applicable scope of this lid.In addition, set lid skirt sealing member has further been simplified Mold Making and has been saved injection molding material.

These characteristics makes the productive costs of mould-manufacturing and lid can access reduction significantly, this type of bottle cap also can make encapsulation be simplified to mono-press-down type (machinery is pressed into or wooden mallet is knocked in) by general rotation press-down type, has improved the encapsulation work efficiency and has simplified sealed in unit.

The accompanying drawing drawing is described as follows:

Fig. 1 is the lateral plan of this container cover one embodiment.

Fig. 2 is the lateral plan of another embodiment.

Fig. 3 is the lateral plan of another embodiment.

Fig. 4 is the local amplification view of face A-A among Fig. 3.

Fig. 5 to Fig. 7 is the part sectional view of this lid lid skirt seal ring three embodiment.

Below in conjunction with accompanying drawing this container cover is described further:

Among Fig. 1,1 is caping, and its end face can be annotated branding; 2 is screw thread; 3 for to cover skirt, and its internal diameter is a; 4 is lock ring, and its upper surface is bevelled inclined-plane, inside below 23; 5 is the annular membrane body, and its thickness has at least half-turn to be controlled at 0.06 to 0.35 millimeter, if can be controlled at 0.08 to 0.25 millimeter then easier being twisted into two parts; 6 is block bodies that a circle continuous annular thrust is constituted, and its internal diameter is c, c＜a.Its mould can be provided with two cast gates on caping and lock ring, also can only establish a cast gate on the aforesaid film behind the cast gate body being provided with.This example lid skirt, annular membrane body and lock ring external diameter all equate (the Cone degree that can slightly make progress), are easy to deviate from from die; Because of (also having screw thread 2) upper surface of lock ring and block body inboard all is inclined-planes, again because the semi-rigid and lid thinner thickness of material, and the vertical wide b of 6 medial surface is wide greater than 2 tooth, so when ejector pin of die set and push pedal synchronization action (push pedal can be spacing), whole lid is easy to eject (not being common back-out) from the convex core equally, and 5 do not rupture.Get a less than the vessel port external diameter, one section (15) of lid skirt are as sealing member, can seal with the vessel port interference fit, this can play the effect of simplifying the bottle cap sealing structure and economizing injection molding material for the less bottle class of some bottleneck external diameter tolerances (for example blow molded bottle, high gear glass bottle).With above-mentioned, because the elasticity of lid and 6 inside lower end face are the inclined-plane, this lid very easily from top to bottom is pressed into bottleneck, and needn't use the packaging machinery (also can continue to use) that now extensively adopts rotation to press down.The anti-skidding line of being convenient to screw capping also can be established in 3 outsides.

Among Fig. 2,7 is the solid block body that a circle is interrupted circular protrusion, and 11 for covering force-bearing ring outside the skirt lower end.12 is the inboard force-bearing ring of lock ring upper end, and 14 is cast gate muscle on the columnar membrane on the annular membrane body; 16 is the caping seal ring, and the ring-type on it is thin prominent, and to adapt to the envelope of the bigger container of vessel port id tolerance (as the low gear glass bottle) along 17 close.In this example, c＞a, the medial surface of block body 7 is vertically wide can be wide less than ridge.22 Wei Vertical bar shaped load muscle; 9 is lock ring lateral surface intensive aspect, it also can when the demoulding, bear mould push pedal power and make push pedal (internal diameter greater than 5 internal diameter) needn't be spacing and with push rod synchronization action always, to simplify mould structure.Other parts label the same (down also together).

Among Fig. 3 and Fig. 4, the 8th, inboard upper and lower end face is the block body on skew surface (or face of cylinder), and because of c＜a, it is wide that its curved surface vertically is wider than the tooth of screw thread 2; 10 is lock ring medial surface intensive aspect, 9 of 10 comparable Fig. 2 is set makes the lid lateral surface steep, attractive in appearance.13 is cast gate body on the film, be that annular membrane body the preceding paragraph string and the circular arc less than half-turn the folds reinforcement of (also one section curve and circular arc fold); 21 for covering the inclined-plane of skirt lower surface.

Among Fig. 5 to Fig. 7 18～20 is the available portion-form of this lid lid skirt seal ring.18 for covering the ring bodies on the skirt medial surface, and its internal diameter is slightly less than the vessel port external diameter; 19 than 18 thin and more high resiliences; 18 and 19 are adapted to the less container of vessel port external diameter tolerance.20 are the thin prominent edge of ring-type, and it is adapted to the less container of vessel port external diameter tolerance.Be provided with and cover the skirt seal ring, mould structure is simple and economize injection molding material in the time of can the caping seal ring being set.

Interchangeable or the otherwise combined of this lid each several part structure shown in above-mentioned each accompanying drawing.

The preferred embodiment of this lid is promptly shown in Fig. 2 and Fig. 3,4.The lid of Fig. 2 is applicable to now a large amount of common round bottles that use, medicine bottle, soy cruet, sesame oil bottle, vinegar bottle etc.; Fig. 3,4 bottle cap are applicable to now widely used beverage bottle, false-proof wine bottle etc.The described structure of present patent application also may be used on covering of bottle, jar, altar, bucket (for example Plastic Drum) of numerous food product, cosmetics, chemicals etc.The high pressure polyethylene injection moulding of bottle cap shown in Fig. 2,3,4, thick desirable 0.5～1.5 millimeter of lid, desirable 0.08～0.18 millimeter of the thickness of annular membrane body, the annular membrane body is vertically high desirable below 1 millimeter, the thickness (adding that thin-film body is thick) and the arc length of cast gate body are all desirable more than 0.2 millimeter on Fig. 3,4 the film, cast gate manadesma thick (adding that thin-film body is thick) and width are all desirable more than 0.3 millimeter on the film among Fig. 2, and the thickness of this two cast gates body covers skirt and be advisable in the lock ring inboard not protrude in.This lid cost is less than half of aluminium anti-fake bottle lid commonly used, and than aluminium lid withstanding corrosion, easily encapsulation, thereby bigger application prospect is arranged.

Claims (10)

1, a kind of plastics anti-counterfeit container lid, by caping (1), the lid skirt (3) of inner side mounting thread (2), form by easily broken connector and the lock ring (4) that is connected as a single entity of lid skirt, the upper surface of lock ring is bevelled inclined-plane (23), inside below, the lock ring medial surface is provided with the block body with the lid single injection-molded, this block body is the circular protrusion thing (6～8) that upper and lower end face is the continuous of inclined-plane or is interrupted, it is characterized in that described easily broken connector is annular membrane body (5), it has the long thickness of a semi-ring at least between 0.06 to 0.35 millimeter.

2, container cover according to claim 1 is characterized in that described annular membrane body is provided with cast gate body on the film, and the cast gate body is the reinforcement (13) on the annular membrane body on this film, and its total film thickness and arc length are all greater than 0.15 millimeter.

3, container cover according to claim 1, the thickness of whole circle that it is characterized in that the annular membrane body and are provided with cast gate muscle (14) on the film all between 0.08 to 0.18 millimeter on the annular membrane body in half-turn.

4, according to claim 1 or 2 or 3 described container cover, it is characterized in that internal diameter that block body encloses less than lid skirt internal diameter, block body (6,8) medial surface is wider than vertically that to cover skirt medial surface screw thread (2) tooth loose.

5,, it is characterized in that the medial surface of lock ring or lateral surface or inside and outside two sides are provided with lock ring intensive aspect (9,10) according to claim 1 or 2 or 3 described container cover.

6,, it is characterized in that being provided with and cover skirt sealing member (15) or cover skirt seal ring (18～20) or caping seal ring (16,17) according to claim 1 or 2 or 3 described container cover.

7,, it is characterized in that covering skirt lower end or lock ring upper end and be provided with force-bearing ring (11,12) according to claim 1 or 2 or 3 described container cover.

8, according to claim 1 or 2 or 3 described container cover, it is characterized in that covering the skirt lower end and be provided with force-bearing ring (11), lid skirt lateral surface is provided with load muscle (22).

9,, it is characterized in that covering the skirt lower surface and be provided with inclined-plane (21) according to claim 1 or 2 or 3 described container cover.

10, container cover according to claim 5, it is characterized in that covering the skirt lower end and be provided with force-bearing ring (11), lid skirt lateral surface is provided with load muscle (22) and is provided with and covers skirt sealing member (15) or lid skirt seal ring (18～20) or caping seal ring (16,17).

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