CN1733430A

CN1733430A - Multi-color screwdriver handle and method for manufacturing the same

Info

Publication number: CN1733430A
Application number: CN 200410053622
Authority: CN
Inventors: 徐志明
Original assignee: Zhejiang Sanding Tools Co Ltd
Current assignee: Zhejiang Sanding Tools Co Ltd
Priority date: 2004-08-11
Filing date: 2004-08-11
Publication date: 2006-02-15

Abstract

The invention relates to color screw driver handle and preparation method. Wherein, the handle comprises inner core with some button slots inserted with color button, and outer layer wrapped tightly on outer surface of inner core except the color buttons; the preparation method comprises, injecting inner core, color button and button cap separately, inserting button and caps on inner core; putting the assembled core into injection machine mould to inject the outer layer on outer surface of inner core except buttons and caps; and obtaining the product. This invention cuts greatly production period, improves stability of product quality, increases cost and has well market future.

Description

A kind of polychrome screw driver handle and manufacture method thereof

Technical field

The present invention relates to a kind of polychrome screw driver handle and manufacture method thereof.

Background technology

Existing screw driver handle generally adopts timber or animi resin material to make, not shock-resistant, the surface is easy to generate wearing and tearing, depression, the handle axial surface is made the straight trough ditch usually, when using screwdriver, particularly when moment of torsion was bigger, owing to be subjected to the frictional force effect palm of the hand and palm congestion and swelling pain often to occur, structure was not very good.Chinese invention patent (96102903.X) discloses composite layer screw driver handle, and this handle is made of inner core and skin, and skin is a soft material under the normal temperature, has solved the problems referred to above to a certain extent.But the skin of this handle be 5 strip member clinkerings on the outer surface of inner core, after permanent the use, skin peels off easily.The interface must form the clinkering layer between skin and the inner core simultaneously, defines the application of material and the development of technology.In addition, this handle has only 2 kinds of colors, and color is relatively more dull, and advantage is little in modern commercial competition.

In addition, some handles are polychromes, for example the processing method following (shown in Fig. 4～8) of making a kind of polychrome screw driver handle: 1, by semi-finished product of No. 1 injection machine injection moulding; 2, semi-finished product are packed into No. 2 injection machines with another kind of color injection moulding secondary semi-finished product; 3, the secondary semi-finished product are packed into No. 3 injection machines with three semi-finished product of the third color injection moulding; 4, three semi-finished product are packed into four semi-finished product of the 4th kind of color injection moulding of No. 4 injection machines; 5, the injection machine of again four semi-finished product being packed into is injection-molded finished.This production method needs multiple tracks injection moulding operation, and the production cycle is long, and production efficiency is low, and product quality is difficult to control in the processing.Cast gate in the processing must be exposed simultaneously, has influenced the attractive in appearance of product, and as different trade mark, the literal of mark on handle, then same class handle just needs different moulds in addition, and mould and die accuracy is required height, has increased the cost of making greatly.

Summary of the invention

In order to solve above technological deficiency, the purpose of this invention is to provide a kind of easy to process, steady quality, can be fitted to coloury polychrome screw driver handle according to market demand.

Another object of the present invention provides the manufacture method of this handle.

To achieve these goals, the technical scheme below the present invention has adopted: a kind of polychrome screw driver handle, by inner core and outer the composition, inner core and skin are closely linked, and inner core is a rigid plastics under the normal temperature state, and skin is a soft material.Be circumferentially with some keyways along inner core, be inlaid with colorful key on keyway, colorful key is the middle dead key of basin shape, and its border width equates that with width of keyway its shell surface can be marked with pattern, literal when injection moulding.On the outer interior core outer surface that closely is wrapped in except that colorful key, it circumferentially is evenly equipped with 4～8 sof needle line blocks, and outer front portion is provided with and refers to tripe shape groove.The inner core top is provided with the cap key in addition, and the cap key is installed on the boss on inner core top.Inner core also is provided with two symmetrical boss that do not wrapped up by skin, has through hole along the boss centre.

The processing method of above-mentioned polychrome screw driver handle is as follows:

A, with injection machine respectively injection moulding inner core, colorful key and cap key;

B, with colorful key and cap key setting-in to inner core;

C, the inner core that assembles is put into the mould of injection machine, with the outer surface of outer injection to the inner core except that colorful key and cap key.

The present invention has shortened the cycle of producing greatly owing to adopted above technical scheme and processing method, and is easy to process, improved the stability of product quality, and production cost is obviously reduced.This handle can be fitted to rich color according to market demand simultaneously, has market prospects preferably.

Description of drawings

Fig. 1 is the assembly structure schematic diagram of inner core of the present invention;

Fig. 2 is inner core assembling of the present invention back structural representation;

Fig. 3 is a finished product schematic perspective view of the present invention;

Fig. 4 is once half-finished schematic diagram in the prior art;

Fig. 5 is the half-finished schematic diagram of secondary in the prior art;

Fig. 6 is three half-finished schematic diagrames in the prior art;

Fig. 7 is four half-finished schematic diagrames in the prior art;

Fig. 8 is the schematic diagram of finished product in the prior art.

The specific embodiment

Make a detailed explanation below in conjunction with 1～3 pair of specific embodiments of the invention of accompanying drawing.

A kind of polychrome screw driver handle as shown in Figure 3 closely wraps up inner core 4 by outer 8 and forms, and inner core 4 is thermoplastic PP, and outer 8 is thermoplastic elastomer (TPE) TPR.

Inner core 4 as shown in Figure 1, colorful key 1 and cap key 7.Inner core 4 circumferentially be arranged with 2 keyways 2, above keyway 2, circumferentially be arranged with 2 boss 3, inner core 4 is provided with through hole 5 in the center of boss 3, inner core 4 tops are provided with cap key boss 6.Colorful key 1 is a dead key in the basin shape that varies in color, its border width equates with keyway 2 width on the core body, its shell surface is marked with trade mark, pattern, literal (it is fixed specifically can to come according to requirement of client) when injection moulding, the cast gate of colorful key 1 is on key body internal layer surface, thereby can not influence the outward appearance of handle.Cap key 7 is a cap-like, inside diameter and cap key boss 6 equal diameters, and its cast gate is also on key body internal layer surface.

The processing method of above-mentioned inner core 4, colorful key 1 and cap key 7 is as follows:

1, the PP particulate material is added the color powder and on mixer, stir, access required color;

2, the raw material that mixes up being put into drying machine dries;

3, raw material is put into the injection machine heat fused of injection moulding inner core 4, colorful key 1 and cap key 7 respectively, temperature is 170 ℃～185 ℃, injection mo(u)lding respectively;

4, after pressurize a period of time, take out the air cooling, collect inner core 4, colorful key 1 and cap key 7 respectively, and be sent to the assembly shop.

In the assembly shop, colorful key 1 is mounted on the keyway 2, and cap key 7 is installed on the cap key boss 6.Again mounted inner core 4 (as shown in Figure 2) is put into injection moulding machine, the thermoplastic elastomer (TPE) TPR that melts is injected into inner core 4 outer surfaces, form skin 8, wherein colorful key 1, boss 3 and cap key 7 are exposed, and processing temperature is 150 ℃～155 ℃.By injection moulding, outer 8 closely wrap up inner core 4, and colorful key 1 and cap key 7 are fixed on the inner core 4.Outer 8 circumferentially are injected with 8 sof needle line blocks 10, and the front portion also is injected with 4 and refers to tripe shape groove 9.

When in use, the hand gripping handle, the finger is pinned just and is referred to tripe shape groove 9, the centre of the palm is facing to cap key 7, and its whole moulding meets ergonomic designs, and sof needle line block 10 can increase the gripping frictional resistance, prevent slippage, hand can more laborsavingly carry out turn, and feel is splendid.5 of through holes on the handle are convenient to screwdriver is hung on the hook.

Claims

1. polychrome screw driver handle, form by inner core (4) and outer (8), inner core (4) and outer (8) are closely linked, it is characterized in that being circumferentially with some keyways (2) along inner core (4), be inlaid with colorful key (1) on keyway (2), outer (8) closely are wrapped on inner core (4) outer surface except that colorful key (1).

2. a kind of polychrome screw driver handle as claimed in claim 1 is characterized in that inner core under the normal temperature state (4) is a rigid plastics, and outer (8) are soft material.

3. a kind of polychrome screw driver handle as claimed in claim 1 is characterized in that inner core (4) is provided with not by two symmetrical boss (3) of outer (8) parcel, has through hole (5) along boss (3) centre.

4. as claim 1 or 2 or 3 described a kind of polychrome screw driver handles, it is characterized in that inner core (4) top is provided with cap key (7), cap key (7) is installed on the cap key boss (6) on inner core (4) top.

5. as claim 1 or 2 or 3 described a kind of polychrome screw driver handles, it is characterized in that skin (8) circumferentially is evenly distributed with 4～8 sof needle line blocks (10), outer (8) front portion is provided with and refers to tripe shape groove (9).

6. as claim 1 or 2 or 3 described a kind of polychrome screw driver handles, it is characterized in that colorful key (1) is the middle dead key of basin shape, its border width equates with keyway (2) width.

7. a kind of polychrome screw driver handle as claimed in claim 5 is characterized in that the case surface of colorful key (1) is marked with pattern, literal when injection moulding.

8. the manufacture method of a kind of polychrome screw driver handle as claimed in claim 1 is characterized in that this manufacture method comprises following operation:

A, with injection machine respectively injection moulding inner core (4), colorful key (1) and cap key (7);

B, with colorful key (1) and cap key (7) setting-in to inner core (4);

C, the inner core that assembles is put into the mould of injection machine, outer (8) are injected into the outer surface of the inner core (4) except that colorful key (1), cap key (7).