CN1176804C

CN1176804C - Method for laying film on workpiece

Info

Publication number: CN1176804C
Application number: CNB011300604A
Authority: CN
Inventors: 罗永开; 罗永德
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-12-07
Filing date: 2001-12-07
Publication date: 2004-11-24
Anticipated expiration: 2021-12-07
Also published as: CN1422742A

Abstract

The present invention relates to a method for laying a thin film on a work piece by using a machine. The method comprises the following steps that firstly, the thin film is expanded and arranged on one side of the work piece, which needs to be covered with the thin film; then the expanded part of the thin film is arranged in a sealing cavity together with the work piece, and the sealing cavity is divided into two chambers which are not ventilated mutually by the thin film in the sealing cavity. The present invention is characterized in that air is pumped out from the chamber without the work piece, then the air in the chamber in which the work piece is arranged is pumped out, and finally, positive pressure is applied to the chamber in which the air is pumped out at first to press the thin film onto the work piece tightly. Because the air in the chamber without the work piece is pumped out firstly in the method, the thin film can not be attached to the work piece when the air in the chamber in which the work piece is arranged is pumped out, and the air between the work piece and the thin film can be sucked out totally. The thin film can be easily pressed on and attached to the surface of the work piece when the positive pressure is applied, and thereby, the quality of laying the thin film is enhanced. In addition, the method is also suitable for thin films with sticky attaching surfaces.

Description

A kind of on workpiece the method for film laying

Technical field

The present invention relates to a kind of on workpiece the method for film laying, particularly utilize the method for machine film laying on the workpiece.

Background technology

Aborning people often need be on workpiece film laying, and great majority all are to utilize machine to lay, and for example with the vacuum facing machine film are laid on number plate, the decoration board.Existing laying method is desire overlay film one side of earlier film being launched to be placed on workpiece, film with deploying portion is placed in the annular seal space together with workpiece then, and make the film in the annular seal space annular seal space is separated into two chambers of not exchanging information, then bleed from a side cavity that is placed with workpiece, make this side cavity become negative pressure state, apply malleation to the opposite side chamber at last, film is pressed on the workpiece, so far just can open annular seal space and take out workpiece.The shortcoming of this shop film method is: when when a side cavity that is placed with workpiece bleeds, film will be fitted with workpiece, if surface of the work has dark blind hole, for example more than 3 millimeters, and the blind hole sidewall is precipitous, the film that is fitted in so on the workpiece will be shut the air in the blind hole in blind hole as lid, air in the blind hole is difficult to be drawn out of, because the conflict effect of this part air, after this no matter apply great malleation, all be difficult to make film and blind hole internal face docile and obedient well, make the finished surface that processes form bubble, influenced product quality even can not satisfy the veneer requirement at all, the special film that has viscosity for binding face, generally all can not lay in this way, can only lean on craft, this can influence production efficiency again.

Summary of the invention

The purpose of this invention is to provide a kind of on workpiece the method for film laying, this method has dark blind hole for those surfaces, and the precipitous workpiece of blind hole sidewall, also can make film and surface of the work docile and obedient well.

The present invention is achieved in that desire overlay film one side of earlier film being launched to be placed on workpiece, film with deploying portion is placed in the annular seal space together with workpiece then, and make the film in the annular seal space annular seal space is separated into two chambers of not exchanging information, especially, a present invention at first never side cavity of workpiece bleeds, just from being placed with the opposite side chamber evacuation of workpiece, apply malleation to a side cavity of bleeding at first at last then, film is pressed on the workpiece.Because a present invention at first never side cavity of workpiece bleeds, therefore when being placed with the opposite side chamber evacuation of workpiece, film can not fitted with workpiece, air in the surface of the work blind hole can be by complete sucking-off, just can at an easy rate film be compressed docile and obediently during malleation to be applied, realize purpose of the present invention at blind hole internal surface.

Advantage of the present invention be not only film can be compressed docile and obedient at darker blind hole internal face, and for the sharp keen workpiece of the root knuckle of concave-convex surface big rise and fall, bossing, also can make film and knuckle position docile and obedient, thereby improve laying of the membrane quality, product quality is improved a lot; On the other hand, the inventive method is applicable to that also binding face has the film of viscosity, has overcome prior art and can only lean on manual shortcoming of laying this film, has improved production efficiency.

Description of drawings

Fig. 1 is the embodiment that realizes the inventive method with the vacuum facing machine;

Fig. 2 is the state diagram behind the vacuum facing machine matched moulds;

Fig. 3 is the state diagram when the upper cavity of vacuum facing machine is bled;

Fig. 4 is the state diagram when the upper cavity of vacuum facing machine applies malleation.

The specific embodiment

Referring to Fig. 1, the vacuum facing machine has a patrix 1 and a counterdie 2, upper die and lower die respectively have a cavity 3,4, in patrix, also be provided with exothermal infrared 10 and the thermal capacitance plate 5 that has through hole, thermal capacitance plate 5 is drawn exothermal infrared 10 heat, so that can equably film be heated to suitable temperature when needed.When spreading film, workpiece 6 is placed on the counterdie 2, and film 7 launches to be placed on desire overlay film one side of workpiece 6, upper and lower mould is closed up constitute an annular seal space, is sealed by rubber 11 between the upper and lower mould.The film 7 of deploying portion is sealed in the sealing chamber together with workpiece 6, and film 7 is separated into annular seal space two chambers up and down of not exchanging information.Before the film of shop, also need usually film 7 to be heated to suitable temperature, so that improve the ductility of film and the adhesion between film and workpiece with exothermal infrared 10 and thermal capacitance plate 5.Hereto, the above-mentioned process that adopts is identical with prior art, next as shown in Figure 3, special feature of the present invention is at first to bleed in the cavity 3 of patrix by tracheae 8, just bleed from the cavity 4 of counterdie then, make film 7 rely on thermal capacitance plate 5 and do not contact, at last just as shown in Figure 4 with workpiece 6 by tracheae 9, apply malleation by tracheae 8 to the cavity 3 of patrix, film 7 is pressed on the workpiece 6.Owing at first bleed from the cavity 3 of patrix, therefore when when the cavity 4 of counterdie is bled, film 7 can not fitted with workpiece 6, air between workpiece 6 and the film 7 can be siphoned away fully, last when the cavity 3 of patrix applies malleation, just can at an easy rate film 7 be compressed docile and obedient surface, even surface of the work has darker blind hole at workpiece 6, and the blind hole sidewall is precipitous, also can make film and blind hole internal face docile and obedient.The time that patrix is bled prior to counterdie can be determined by test, should guarantee that film 7 is at first upwards picked up, and generally can shift to an earlier date about 1/2nd seconds.For guaranteeing that laying of the membrane quality is preferably arranged, the cavity of upper and lower mould should be less than-0.1MPa (atmospheric pressure relatively) by the atmospheric pressure value after bleeding, and the atmospheric pressure value that applies malleation to the patrix cavity should be greater than 2Kg/cm ²

Claims

1. the method for a film laying on workpiece, earlier film is launched to be placed on desire overlay film one side of workpiece, film with deploying portion is placed in the annular seal space together with workpiece then, and make the film in the annular seal space annular seal space is separated into two chambers of not exchanging information, it is characterized in that: at first never a side cavity of workpiece bleeds, just from being placed with the opposite side chamber evacuation of workpiece, apply malleation to a side cavity of bleeding at first at last then, film is pressed on the workpiece.