CN1982029A

CN1982029A - Rope fastener injecting method

Info

Publication number: CN1982029A
Application number: CN 200510120910
Authority: CN
Inventors: 赵利民
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-14
Filing date: 2005-12-14
Publication date: 2007-06-20

Abstract

An injection molding method for rope ring includes such steps as arranging more than 2 locating posts in the molding cavity of a mould, winding a rope around said locating posts, stretching it, injection molding, and removing exposed rope end.

Description

A kind of rope fastener injecting method

Technical field

The present invention relates to a kind of rope fastener injecting method.

Background technology

As shown in Figure 1, be a kind of common sling structure, it comprises rope sling 1 and discount 2 two parts, and its rope sling 1 can be used to fasten the clasp of clothes, is equivalent to buttonhole, and this sling also is the fastener part commonly used of various case and bag, so its purposes is very extensive.

In the prior art, the molding mode of sling has two kinds usually: a kind of is PVC cold glue, a glue mode; Another kind is the mode of HTHP plastic rubber ejaculate molding.

PVC cold glue, a glue mode technology are: earlier rope is sheared by length, the broken end with the rope two ends is put in the shape chamber of mould again, drips glue then, puts it into afterwards to toast in the baking box to make it to solidify, and the broken end of rope sling 1 can be coated in the discount 2 like this.Form double-colored or the polychrome discount as desire, then repeat above-mentioned technology, carry out secondary or repeatedly drip glue.Because above-mentioned process using is the glue chapter mode of trace ejaculation cold glue, no pressure, the rope broken end is difficult for skew, so quality is good after the moulding, the yield rate height, and the trace ejaculation has the little characteristics of volume.But the defective of glue chapter mode is: one side is for brightless matsurface at least, thereby influences the outward appearance of product and reduce the attraction.In addition, because the rope broken end is not strained and fixed in the shape chamber, the thickness at broken end place is subjected to ectocine uncertain, so after the moulding, it is also uncertain to be coated on the aperture that forms in the discount, like this, not only influence the outward appearance of entire block, if the aperture is too big, also can make the sidewall of discount too thin, and influencing the quality of product, too big aperture also easily makes fag end deviate from discount, and influences product quality equally.

HTHP plastic rubber ejaculate molding mode also is the rope broken end that shears to be put into the shape chamber of mould, molds discount with the plastic rubber ejaculate molding technology again, and the broken end of rope is coated in this discount.The advantage of ejection formation is: each face of discount all can be wet look, and its outward appearance is good.But the ejection formation process will be accompanied by HTHP, and because the rope broken end is unfixing yet, high pressure very easily dashes disorderly broken end, it being offset up and down, even being exposed to and forming waste product outside the discount, is to reduce percent defective, just must strengthen the size of discount, then make the volume of whole final finished excessive.In addition,,, thereby influence the presentation quality of product,, make the discount sidewall too thin, also can influence the quality of product if be offset excessively because the existence of high pressure also easily makes the skew of rope broken end even make large-sized discount.And the same with a glue mode, also can there be uncontrollable aperture, and then influences the defective of product quality.

Also has a kind of method of making sling, exactly discount is made the two halves formula, and then cement in together with the discount of hot melting mode with two halves, simultaneously also with the fag end part thermosetting of rope sling in discount, but the fag end of this kind mode does not coat fully with discount, fag end is very easily deviate from the aperture of discount, so quality is relatively poor relatively, and processed complex.

Above-mentioned several mode all has a common defective, and promptly rope is to be in relaxed state when injection moulding, so the internal diameter of discount is the diameter of rope, and rope is stretched during use, and its diameter diminishes, and when the external force of stay cord button was big slightly, rope was very easily deviate from discount.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of can improve yield rate greatly, and makes that small product size is little, technology is simple, and can guarantee the rope fastener injecting method of pore size.

For solving the problems of the technologies described above, technical solution of the present invention is: a kind of rope fastener injecting method, this method is to establish two above reference columns on the mould, with rope also tension on reference column around the home, again in the local injection moulding of presetting discount, then rope is taken off from reference column, cut off the rope that discount exposes.

Described method is for being fixed on an end of rope shape chamber one side of mould cover half, again with rope across crossing this shape chamber, doubling-up is around on the reference column of shape chamber opposite side to form rope sling, and then the rope other end that will walk around reference column oppositely strides across the shape chamber once more, and the other end that tightens up a rope with tensioning mechanism, thereby make whole-root rope keep tension, afterwards, inject discount with ejection forming technique, and the rope that will be across on the shape chamber partly is coated in the discount, and is last, and the semi-finished product of injection mo(u)lding are taken out in mould, and the rope that will expose the discount rear end cuts, and can become the sling finished product.

After described semi-finished product are cut the rope of discount rear end, carry out quadric injection mould or repeatedly injection moulding again, and the fag end that will expose coats partly.

The both sides in described shape chamber respectively are provided with two rope limited posts, and the rope that this rope limited post will be across on the shape chamber is limited in it.

Described mould is a mould one chamber or more than the chamber.

After adopting such scheme, because the present invention is when injection moulding, rope remains the fixed strain state, therefore, after plastic cement penetrates, even have certain pressure, the rope that is across on the shape chamber can displacement yet, the rope that is coated on like this in the discount just can more or not become waste product because of exposing, thereby improve yield rate greatly because of skew influences product quality outside the discount; In addition, exactly because rope can not be offset,, make the volume of product little, and then can carry out secondary even repeatedly injection moulding, to make the sling of the multiple style of multiple color so can adopt trace to penetrate.This mode is much simpler than the technology of cold glue mode, and discount is owing to adopting ejection forming technique to have the surface of light, and presentation quality is good, the product of being made, and pulling force can reach more than the 10KG.

In addition, because rope is in tension, the thickness of rope all is consistent during each injection moulding, like this after the injection mo(u)lding, formed pore size and position are all the same on each discount, thereby make the outward appearance of entire block identical, also can not bring product quality problem too greatly, can improve the quality of entire block greatly because of the aperture.

Description of drawings

Fig. 1 is the structural representation of common sling;

Fig. 2 is the schematic diagram of rope fastener injecting method of the present invention;

Fig. 3 is the semi-finished product schematic diagram that molds sling with the method for the invention;

Fig. 4 is the finished product schematic diagram that molds sling with the method for the invention;

Fig. 5 is the schematic perspective view of injection mold cover half of the present invention;

Fig. 6 is the schematic top plan view of injection mold cover half of the present invention.

The specific embodiment

Please as shown in Figure 2, the injection moulding process of sling of the present invention is: shape chamber 5 one examples that an end of rope 3 are fixed on cover half 4, again with rope 3 across crossing shape chamber 5, doubling-up is around on the reference column 6 of shape chamber 5 opposite sides to form

rope sling

1,6 of this reference columns are quick, stable, fixation accurately, and then rope 3 other ends that will walk around reference column 6 oppositely stride across shape chamber 5 once more, and with tighten up a rope 3 the other end of tensioning mechanism, thereby make whole-root rope 3 keep tension, afterwards, inject discount 2 with ejection forming technique, and the rope that will be across on the shape chamber 5 partly is coated in the discount 2, and is last, and the semi-finished product (as shown in Figure 3) of injection mo(u)lding are taken out in mould, and the rope that will expose discount 2 rear ends cuts, and can become the sling finished product.Yet, this finished product can not be exempted from forms the fag end that can't cut fully in discount 2 rear ends, therefore will influence the outward appearance of product, at this moment, can carry out quadric injection mould or repeatedly injection moulding, the fag end that will expose partly coats (as shown in Figure 5), and quadric injection mould or repeatedly injection moulding can use another kind of color, to increase the diversity of product.

Shown in Fig. 5,6, it comprises the winding method of rope 3 for adopting cover half 4 schematic diagrames of the designed injection mold of injection moulding process of the present invention, and this mould adopts a mould four chamber modes.Have four shape chambeies 5 on the described cover half 4, per two shape chambeies are one group, now two shape chambeies with the top are that example is illustrated, respectively be provided with two rope limited posts 7 in each 5 both sides, shape chamber, 5 inboards, a shape chamber are provided with a fag end fixing hole 8 therein, one end of rope 3 is fixed in this fag end fixing hole 8, again with rope 3 across crossing this shape chamber 5, doubling-up is around on the reference column 6 in these 5 outsides, shape chamber to form rope sling 1, and then the rope 3 that will walk around reference column 6 oppositely strides across this shape chamber 5, be limited between the rope limited post 7 of both sides with seasonal two sections ropes that are across on this shape chamber 5, afterwards, continuation with rope 3 across crossing another shape chamber 5, and form rope slings 1 with the reference column 6 that same method is walked around these 5 outsides, shape chamber, oppositely stride across this shape chamber 5 again after, rope 3 other ends are pulled out in cover half 4, and link to each other with the tensioning mechanism (not shown), in order to tighten up a rope.Two shape chambeies 5 of these cover half 4 belows can begin ejection formation after winding rope 3 with the circle of the same manner.After the moulding, only need the part rope between two discounts is cut off, can become semi-finished product as shown in Figure 3, carry out again quadric injection mould or repeatedly injection moulding can become as shown in Figure 4 finished product.Certainly, enclose wiring 3 in this way, also can be made into the mould of a mould one chamber, two chambeies or above or the like structure.

Claims

1, a kind of rope fastener injecting method is characterized in that: this method is to establish two above reference columns on the mould, with rope also tension on reference column around the home, in the local injection moulding of default discount, then rope is taken off from reference column again, cuts off the rope that discount exposes.

2, a kind of rope fastener injecting method as claimed in claim 1, it is characterized in that: this method is for being fixed on an end of rope shape chamber one side of mould cover half, again with rope across crossing this shape chamber, doubling-up is around on the reference column of shape chamber opposite side to form rope sling, and then the rope other end that will walk around reference column oppositely strides across the shape chamber once more, and the other end that tightens up a rope with tensioning mechanism, thereby make whole-root rope keep tension, afterwards, inject discount with ejection forming technique, and the rope that will be across on the shape chamber partly is coated in the discount, at last, the semi-finished product of injection mo(u)lding are taken out in mould, and the rope that will expose the discount rear end cuts, can become the sling finished product.

3, a kind of rope fastener injecting method as claimed in claim 1 is characterized in that: after described semi-finished product are cut the rope of discount rear end, carry out quadric injection mould or repeatedly injection moulding again, and the fag end that will expose coats partly.

4, a kind of rope fastener injecting method as claimed in claim 1 is characterized in that: the both sides in described shape chamber respectively are provided with two rope limited posts, and the rope that this rope limited post will be across on the shape chamber is limited in it.

5, a kind of rope fastener injecting method as claimed in claim 1 is characterized in that: described mould is a mould one chamber or more than the chamber.