CN203739129U

CN203739129U - Plastic mold structure for automobile safety belt coil spring seat

Info

Publication number: CN203739129U
Application number: CN201420063084.9U
Authority: CN
Inventors: 陈胜明; 徐文广; 胡江丽
Original assignee: SHANGHAI KEGONG MECHANICAL AND ELECTRICAL EQUIPMENT CO Ltd
Current assignee: SHANGHAI KEGONG MECHANICAL AND ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2014-02-12
Filing date: 2014-02-12
Publication date: 2014-07-30
Anticipated expiration: 2024-02-12

Abstract

The utility model relates to a plastic mold structure for an automobile safety belt coil spring seat. A cushion plate is connected to the bottoms of a female mold plate and a male mold plate; a bolt and a spring are arranged between the male mold plate and the cushion plate; the female mold plate is provided with a female mold core; the male mold plate is provided with a male mold core; a gas exhaust insert is embedded in the female mold core at the position of an expansion pin; and a molding insert penetrates through the male mold core and is fixed on the cushion plate. According to the utility model, the mold structure is simplified, and the mold processing becomes easy; problems of material shortage or no full are not generated in the injection molding production process, and the requirement on product quality is reached.

Description

A kind of mould of plastics structure for car belt coil spring seat

Technical field

The utility model belongs to automotive plastic parts mould manufacturing field, especially a kind of mould structure for the car belt coil spring seat with expansion pin.

Background technology

Car belt wind spring assembly is important automotive safety part, wherein coil spring seat is the vital part of placing wind spring, wind spring assembly is to be fixed on clamp by the expansion pin on coil spring seat, this expansion pin generally has 3 to 4 on coil spring seat, as shown in Figure 1, the head of expansion pin is back taper, comprises expansion set I and expansion pin II, offers 3 lacinia grooves on expansion set I.During expansion pin assembling, expansion set, to internal strain, enters in coordinated metal aperture, and the expansion pin II when above squeezes into after expansion set under external force by force, and expansion set is outwards out of shape, and back-off is fixed on metallic plate product, has advantages of that installation rate is fast, easy to use.But owing to there being back-off on expansion set, produce to plastic mold manufacture and injection moulding bringing difficulty, common way is the method that mould adopts Double-ejection, but processing is still more loaded down with trivial details, difficult.

Summary of the invention

Technical problem to be solved in the utility model is in car belt coil spring seat, to have strong de-structure, the i.e. technical problem of the mould structure of expansion pin.The utility model provides a kind of mould of plastics structure for car belt coil spring seat, avoids deep hole injection moulding to burn, and reaches simplification mould structure, is convenient to Mould Machining, avoids the bad object of product.

Concrete technical scheme of the present utility model is a kind of mould of plastics structure for car belt coil spring seat, and what comprise caster 1 and male model plate 2 is connected a backing plate 3 below, is provided with bolt 8 and spring 9 between this male model plate 2 and backing plate 3.Caster 1 is provided with mother module core 4, and male model plate 2 is provided with male die core 5, and on mother module core 4, the position of expansion pin studs with exhaust mold insert 6, and moulding mold insert 7, through male die core 5, is fixed on backing plate 3.

In injection molding process, when injection pressurize is cooling complete after, feature die somatotype, male model plate 2 upwards floats together with male die core 4 and product under the effect of spring 9, and is fixed on the endoporus that moulding mold insert 7 on backing plate 3 detaches product.When the step surface of bolt 8 is encountered the confined planes on male model plate 2, male model plate 2 stops action, and feature die continues somatotype.After somatotype finishes, ejecting action starts, product is ejected under push rod effect from die cavity, because the expansion set back-off of product partly has 3 lacinia grooves, back-off part while ejecting because the elasticity of plastics to internal strain, at this moment moulding mold insert 7 has been deviate from, in hole, has living space, and product just can eject smoothly like this.

The utility model is simple in structure, easy to process.The beneficial effects of the utility model are:

1. mould structure adopts twice parting, uses spring to make male model plate separated with backing plate, extracts inner core out, is convenient to the inside contraction of back-off when ejecting.

2. product back-off punishment profile is chosen in the peak of back-off, facilitates the processing of mould.

3. because expansion pin only has the plastic cement of 0.5mm to be connected with the junction of expansion set, as shown in Figure 3, walk glue more difficult, easily feel suffocated, easily cause expansion pin to lack the defects such as material insatiable hunger, at expansion pin head, do exhaust mold insert 6 for this reason, make die venting smooth and easy, solution injection moulding is bad.

Accompanying drawing explanation

Fig. 1 is existing car belt wind spring assembly schematic diagram;

Fig. 2 is a kind of mould of plastics schematic diagram for car belt coil spring seat of the utility model;

Fig. 3 is the enlarged diagram of exhaust mold insert 6 and moulding mold insert 7 in Fig. 2;

Fig. 4 is the enlarged diagram of expansion set back-off part in Fig. 2.

The specific embodiment

Below in conjunction with accompanying drawing, be explained.As shown in Fig. 2, be a kind of mould of plastics structural representation for car belt coil spring seat, caster 1 and male model plate 2 be below connected a backing plate 3, S.H.S.B 8 and Rectangular Spring 9 are installed between male model plate 2 and backing plate 3.On caster 1, be equipped with mother module core 4, be equipped with male die core 5 on male model plate 2, on mother module core 4, the position of expansion pin studs with exhaust mold insert 6, and moulding mold insert 7, through male die core 5, is fixed on backing plate 3.

Product is shown in Fig. 3 at the somatotype of back-off part.Moulding mold insert 7 requires to be made in the peak of back-off, and the latter half of its moulding back-off, goes back forming hole and three lacinia grooves, sees Fig. 4.The first half of back-off is by male die core 5 moulding.

Adopt after the utility model, mould structure is simplified, and it is easy that Mould Machining also becomes.In injection moulding production process, do not have to produce the problem that lacks material or insatiable hunger, reached the requirement of product quality.

Claims

1. for a mould of plastics structure for car belt coil spring seat, what comprise caster and male model plate is connected a backing plate below, between this male model plate and backing plate, is provided with bolt and spring; Caster is provided with mother module core, and male model plate is provided with male die core, and on mother module core, the position of expansion pin studs with exhaust mold insert, and moulding mold insert, through male die core, is fixed on backing plate.