CN1699044A - Secondary forming method for coated plug - Google Patents

Abstract

This invention discloses a post forming method of coated plug, which comprises the following steps: (1) implanting the unvulcanized rubber whose bottom set surface preparation film into the stick harness shaping die, vulcanizing and getting the coated stick harness; (2) implanting the coated stick harness into plug shaping die, then implanting the unvulcanized rubber, vulcanizing and getting the coated plug. It only coats film is the stick harness surface, which can prevent the chemical component of plug into bottle, and seal the plug and bottleneck well.

Description

The post forming method of coated plug

Technical field

The present invention relates to a kind of post forming method of coated plug.

Background technology

General medicinal rubber stopper is infusion solutions, antibiotic or lyophilized formulations no matter, all exists plug and pollutes problems such as soup, medicinal powder, causes product bad, and the pharmaceutical factory is sustained a great loss.Because rubber stopper contains compositions such as vulcanizing agent, promoter, plasticizer, filler, coupling agent, via a period of time or through autoclaving or UV irradiation etc., its inside can discharge above-mentioned substance, and influence medicament, in order to prevent above-mentioned variety of problems, manufacturer has released coated plug, promptly at the surface coating of plug.But, existing coated plug is owing to the reason of manufacturing process, all be compounded with plated film at whole lower surface, promptly not only enter the bottleneck portion plated film at plug, and also be provided with plated film in plug bizet bottom surface, cause coated plug and vial or plastic bottle when combination, cause the poor sealing of plug bizet bottom and bottleneck end face easily, make air enter in the bottle or when autoclaving steam enter a bottle internal contamination medicine.

Summary of the invention

The objective of the invention is: the post forming method that a kind of coated plug is provided, elder generation's moulding plated film stick harness, moulding coated plug then, can only form plated film on the surface of stick harness, can stop chemical composition in the plug to discharge in the bottle and influence medicine, can make plug and bottleneck good seal again, stop air, steam to enter in the bottle.

Technical scheme of the present invention is: a kind of post forming method of coated plug comprises the following steps:

(1) bottom is equipped with the surface and gives the half finished rubber of handling film and insert in the stick harness mould, make the plated film stick harness through sulfuration;

(2) the plated film stick harness is inserted in the capsule forming mould, above the plated film stick harness, insert half finished rubber, make coated plug through sulfuration.

Advantage of the present invention is:

1. prior art is that the half finished rubber of bottom surface film laying is inserted in the plug and mould, the one-shot forming coated plug, therefore will inevitably be at the surface of stick harness and the whole compound upper films of lower plane of plug hat, when making up with bottleneck, be compounded with the plug hat lower plane and the bottleneck end face seal of film, because coated surface and bottle port surface be smoother all, so the as easy as rolling off a log air that makes enters in the bottle.

2. the first moulding stick harness in one-time-shaped mould of the present invention, plated film only is compounded in the surface of stick harness, then in the post forming mould above stick harness moulding plug hat and form coated plug, so the lower plane of plug hat does not have plated film, when making up with bottleneck, the lower plane of plug hat still is the sealing of rubber and bottleneck, and sealing property is just relatively good, and air is difficult for entering in the bottle.

Description of drawings

The invention will be further described below in conjunction with embodiment:

Fig. 1 is an one-shot forming schematic diagram of the present invention;

Fig. 2 is a post forming schematic diagram of the present invention.

Wherein: 1 film; 2 half finished rubbers; 3 stick harness moulds; 4 plated film stick harnesses; 5 capsule forming moulds; 6 half finished rubbers.

The specific embodiment

Embodiment: as shown in Figure 1 and Figure 2, a kind of post forming method of coated plug:

(1) bottom is equipped with the surface and gives the half finished rubber 2 of handling film 1 and insert in the stick harness mould 3, make plated film stick harness 4 through sulfuration;

(2) plated film stick harness 4 is inserted in the capsule forming mould 5, above plated film stick harness 4, insert half finished rubber 6, make coated plug through sulfuration.

Prior art is the half finished rubber that gives the processing film in the surface to be laid in the bottom surface insert in the plug and mould, once show off coated plug, therefore will inevitably be at the surface of stick harness and the whole compound upper films of lower plane of plug hat, when making up with bottleneck, be compounded with the plug hat lower plane and the bottleneck end face seal of film, because coated surface and bottle port surface be smoother all, so the as easy as rolling off a log air that makes enters in the bottle.

The present invention is moulding stick harness in one-time-shaped mould earlier, plated film only is compounded in the surface of stick harness, then in the post forming mould above stick harness moulding plug hat and form coated plug, so the lower plane of plug hat does not have plated film, when making up with bottleneck, the lower plane of plug hat still is the sealing of rubber and bottleneck, and sealing property is just relatively good, and air is difficult for entering in the bottle.

Claims (1)

1. the post forming method of a coated plug comprises the following steps:

(1) bottom is equipped with the surface and gives the half finished rubber of handling film and insert in the stick harness mould, make the plated film stick harness through sulfuration;

(2) the plated film stick harness is inserted in the capsule forming mould, above the plated film stick harness, insert half finished rubber, make coated plug through sulfuration.

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