阅读说明：本技术 一种大口径非金属筒形制件的复合成型方法 (A kind of composite forming method of the nonmetallic tubular product of heavy caliber ) 是由 许国娟 刘印 阮攀科 刘森茂 郭荣平 郭春梅 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种大口径非金属筒形制件的复合成型方法,具体步骤如下：第一步：采用压塑成型工艺对非金属模压料进行预压,得到预压件；第二步：采用热压罐成型工艺对第一步得到所述预压件进行热压固化,得到热固件；第三步：将第二步得到热固件机加成零件设计尺寸,得到最终产品。本发明的复合成型工艺,通过液压机预压与热压罐成型的复合,解决大口径筒形件压塑成型不达标的问题。采用本发明复合成型工艺得到产品,压制密度高,均匀一致性好,并且缩短了整体成型时间,满足对产品大批量生产的要求。(The invention discloses a kind of composite forming methods of the nonmetallic tubular product of heavy caliber, the specific steps are as follows: step 1: carrying out precompressed to nonmetallic molding compound using moulding shaping process, obtains pre-press；Step 2: obtaining the pre-press to the first step using autoclave forming process carries out hot-press solidifying, thermosetting part is obtained；Step 3: second step is obtained thermosetting part machine addition Element Design size, final products are obtained.Composite molding technique of the invention solves the problems, such as that heavy caliber cylindrical member compression molding is not up to standard by the compound of hydraulic press precompressed and autoclave molding.Product is obtained using composite molding technique of the present invention, pressed density is high, and uniformity consistency is good, and shortens the integrally formed time, meets the requirement produced in enormous quantities to product.)

1. a kind of composite forming method of the nonmetallic tubular product of heavy caliber, it is characterized in that specific step is as follows:

Step 1: carrying out precompressed to nonmetallic molding compound using moulding shaping process, pre-press is obtained；

Step 2: obtaining the pre-press to the first step using autoclave forming process carries out hot-press solidifying, thermosetting part is obtained；

Step 3: second step is obtained thermosetting part machine addition Element Design size, final products are obtained.

2. a kind of composite forming method of the nonmetallic tubular product of heavy caliber as described in claim 1, it is characterized in that: the pressure In the compression tool for moulding moulding process, any one press face is set as consistent with Element Design size, and will be had and part The mold bulk-breaking of the consistent press face of design size, which is put into autoclave together with pre-press, carries out hot-press solidifying.

Technical field

The present invention relates to a kind of composite forming methods of the nonmetallic tubular product of heavy caliber, belong to non-metal items field.

Background technique

The molding of conventional cylindrical structure nonmetallic composite product is taken uses particular manufacturing craft on plastic product hydraulic press The mode of compression moulding is completed, but as the continuous increase of product bore, existing plastic product hydraulic press tonnage have been unable to meet Large-caliber product briquetting pressure it is big technique requirement, the product suppressed often occur product surface blistering it is swollen rise, be rough and uneven in surface, Roughness is poor, density is low (product requirement >=1.64g/cm³) the problems such as, it produces part and is unsatisfactory for pattern requirement.Such as certain jet pipe The cone barrel part of product, maximum caliber reachIt is suppressed on 630 t hydraulic press, suppresses product density only For 1.52g/cm³, there is a wide range of blistering, after turnery processing, still has small-scale loose in interior shape bottom.In addition, It is longer using plastic product hydraulic press molding pressing cycle, it is not able to satisfy production demand.

In order to solve above-mentioned problem, then bold proposition pre-molding on existing plastic product hydraulic press is transferred to heat Press tank cured composite forming method together.

Summary of the invention

The purpose of the present invention is to solve traditional moulding shaping process when suppressing heavy caliber cylindrical member, the production suppressed Product often occur product surface blistering it is swollen rise, be rough and uneven in surface, the problems such as roughness is poor, density is low, to provide a kind of heavy caliber The composite forming method of nonmetallic tubular product.

The purpose of the present invention is what is be achieved through the following technical solutions:

A kind of composite forming method of the nonmetallic tubular product of heavy caliber of the invention, the specific steps are as follows:

Step 1: carrying out precompressed to nonmetallic molding compound using moulding shaping process, pre-press is obtained；

Step 2: obtaining the pre-press to the first step using autoclave forming process carries out hot-press solidifying, thermosetting is obtained Part；

Step 3: second step is obtained thermosetting part machine addition Element Design size, final products are obtained.

In the compression tool of the moulding shaping process, any one press face is set as consistent with Element Design size, And the mold bulk-breaking with press face consistent with Element Design size is put into progress hot pressing in autoclave together with pre-press and is consolidated Change.When hot-press solidifying, a supporting surface of the mold bulk-breaking with press face consistent with Element Design size as hot-press solidifying； After hot-press solidifying, only to being machined out at non-supported face.

Beneficial effect

Composite molding technique of the invention passes through compound, the solution heavy caliber tubular of hydraulic press precompressed and autoclave molding Part compression molding problem not up to standard.Product is obtained using composite molding technique of the present invention, pressed density is high, uniformity consistency It is good, and the integrally formed time is shortened, meet the requirement produced in enormous quantities to product.

Detailed description of the invention

Fig. 1 is the product parts figure prepared in embodiment；

Fig. 2 is the structure chart of pre-pressing die needed for moulding shaping process in embodiment；

Fig. 3 is that part encapsulating structure figure before autoclave forming process is carried out in embodiment；

In figure, 1- external mold；2- bed die；3- part；4- pull ring；5- positioning pin；6- retaining ring；7- upper mold；8- vacuum bag.

Specific embodiment

The contents of the present invention are further described with reference to the accompanying drawings and examples.