CN204604727U - There is the metal insert of internal and external threads - Google Patents

Abstract

The utility model relates to a kind of metal insert with internal and external threads, comprises band female lower inserts and with externally threaded upper inserts, described lower inserts and upper inserts as a whole; The diameter of described upper inserts is less than the diameter of lower inserts, makes inserts and lower inserts form a step; The top of described upper inserts is provided with chamfering, and its chamfer angle can adjust according to plastic oblique angle, to ensure that plastic outer surface does not produce shrink when shaping.The beneficial effects of the utility model are: 1, structure is simple, and making and installation is convenient.2, take up room little, do not affect the spatial design that post moulded by plastic cement.3, the plastic cement top end surface on band inclined-plane can not be made to produce shrink, ensure the quality of plastic cement products.

Description

There is the metal insert of internal and external threads

Technical field

The utility model relates to a kind of for the metal insert in plastic rubber shaping, is specifically related to a kind of metal insert with internal and external threads.

Background technology

Need to use a lot of metal threaded inserts in plastic rubber shaping.Fig. 1 is the plastic cement products 1 with inclined plane not using metal insert, and this plastic cement products comprises base, mould post 2 and have the top cover on inclined-plane 3.See Fig. 2, at present, most metal insert 4 has an internal thread 4-1, profile there are annular grooving 4-2, perpendicular straight knurling 4-3 or ringless-type grooving, outside twill annular knurl, the shape in outside is to ensure that inserts is after plastic rubber shaping, is neither drawn out during assembling, also not producing rotation.But when this metal insert 4 uses on the inclined-plane 3 having certain angle, plastic cement top not only can be made to produce surface and to shrink, affect product appearance, but also the external diameter moulding post 2 can be strengthened, affect the design space of product, see Fig. 3.Therefore, we are in the urgent need to a kind of metal insert that can be applicable to plastic rubber shaping with certain angle inclined-plane.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of metal insert with internal and external threads be applicable in the bevelled plastic rubber shaping of tool, what this metal insert did not only take plastic cement moulds post design space, and plastic cement top end surface can not be made to produce shrink.

The technical scheme that the utility model adopts is: a kind of metal insert with internal and external threads, comprises band female lower inserts and with externally threaded upper inserts, described lower inserts and upper inserts as a whole;

The diameter of described upper inserts is less than the diameter of lower inserts, makes inserts and lower inserts form a step;

The top of described upper inserts is provided with chamfering, and its chamfer angle can adjust according to plastic cement products oblique angle, to ensure that plastic cement products outer surface does not produce shrink when shaping.

Further scheme is: described internal thread and the externally threaded diameter of thread are 2-5mm, can adapt to the requirement that is threaded in general plastic parts.

In the utility model, described internal thread and the externally threaded diameter of thread can equally also can not wait; Described externally threaded length can require to adjust according to the actual design of stud; Described external screw thread is embedded in plastic parts post, and axially bear pulling capacity, radial direction bears certain assembling torsion, and the chamfering on external screw thread top may extend to plastic proximity, and make plastic product wall thickness substantially even, time shaping, outer surface does not produce shrink; Described lower inserts part is substantially identical with the glue post size without threaded insert.

The beneficial effects of the utility model are: 1, structure is simple, and making and installation is convenient.2, take up room little, do not affect the spatial design that post moulded by plastic cement.3, the plastic cement top end surface on band inclined-plane can not be made to produce shrink, ensure the quality of plastic cement products.

Accompanying drawing explanation

Fig. 1 is the plastic cement products with inclined plane not using metal insert.

Fig. 2 is the structural representation of existing metal insert.

Fig. 3 is the plastic cement products using existing metal insert.

Fig. 4 is the structural representation that the utility model has the metal insert of internal and external threads.

Fig. 5 is the plastic cement products using the utility model to have the metal insert of internal and external threads.

In figure: 1, plastic cement products, 2, mould post, 3, inclined-plane, 4, existing metal insert, 4-1, internal thread, 4-2, annular grooving, 4-3, annular knurl, 5, there is the metal insert of internal and external threads, 6, upper inserts, 7, lower inserts, 8, external screw thread, 9, internal thread, 10, step, 11, chamfering, 12, surface shrink.

Detailed description of the invention

Embodiment of the present utility model is further illustrated below in conjunction with accompanying drawing.

See Fig. 4 and Fig. 5, a kind of metal insert with internal and external threads, comprise the lower inserts 7 with internal thread 9 and the upper inserts 6 with external screw thread 8, described lower inserts 7 and upper inserts 6 as a whole, and the diameter of upper inserts 6 is less than the diameter of lower inserts 7, inserts 6 is made to form a step 10 with the junction of lower inserts 7;

In order to ensure that metal insert can be applicable to be with the plastic cement products on inclined-plane 3, make it when shaping, not produce shrink, chamfering 11 can be set on the top of upper inserts 6, its chamfer angle can mate with plastic profile bevel angle (adjusting according to plastic oblique angle), shrinks to ensure that plastic outer surface does not produce when shaping.

In the utility model, the diameter of thread of described internal thread 8 and external screw thread 9 is 2-5mm, can adapt to the requirement that is threaded of moulding post in general plastic cement products 1.The length of shrink external screw thread 9 can require to adjust according to the actual design of stud.

As shown in Figure 3, when existing metal insert 4 embeds plastic cement products 1, because existing metal insert 4 is surrounded by glue, glue post 2 is thicker, not only affects former design space, at inclined-plane 3 place also because the even easy generation surface of glue thickness ununiformity shrinks 12, does not reach product quality requirement.

As shown in Figure 5, when the metal insert 5 with internal and external threads is embedded plastic cement products 1, described upper inserts 6 and lower inserts 7 embed to be moulded in post 2, and glue post 2 diameter without not changing, can not change former design space, and inclined-plane 3 place can not produce shrink substantially.

Claims (2)

1. there is a metal insert for internal and external threads, it is characterized in that: comprise band female lower inserts and with externally threaded upper inserts, described lower inserts and upper inserts as a whole;

The diameter of described upper inserts is less than the diameter of lower inserts;

The top of described upper inserts is provided with chamfering.

2. there is the metal insert of internal and external threads as claimed in claim 1, it is characterized in that: described internal thread and the externally threaded diameter of thread are 2-5mm.