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1. 真空無模成型。真空無模成型進程，將片材加熱到所需溫度后，置于夾持環上，用壓環壓緊，翻開真空泵閥門抽真空，經過光電管控制真空閥調理真空度，直到片材到達所需的成型深度停止。因為自由真空成型法中制件不觸摸任何模具外表，制件外表光澤度高，不帶任何瑕疵。假如塑料本本身是通明的，制件能夠具有最小的光吸收率和通明性，故可用于制作飛機部件如儀器罩和天窗等。
1 vacuum dieless forming. Vacuum forming process, to a required temperature after heating sheet, clamping ring in, with pressure clamping ring, open the vacuum pump vacuum valve, vacuum valve control through photoelectric tube vacuum conditioning, until the sheet forming depth required to stop. Because the free vacuum forming method of the product does not touch any mold surface, the appearance of high gloss, without any defects. If the plastic itself is brightly lit, the product can have a minimum light absorption and light, it can be used for the production of aircraft components such as instrument covers and skylights, etc..
真空無模成型法在成型進程中只能改動制件的拉伸程度和外廓形狀，因而不能成型外型雜亂的制件。另外，成型進程中，隨著拉伸程度的增大，最大變形區（即片材中心）的厚度不斷減小，因而實踐出產中拉伸比（H/D）通常應小于75%。
Vacuum forming method in the forming process can only change parts of the degree of tension and outline shape, which can shape the messy parts. In addition, in the process of forming, with the increase of the stretching degree, the thickness of the maximum deformation zone (i.e., the center of the sheet) decreases, so that the ratio of H/D in practice is usually less than 75%.
在運用此法進行加工時，操作員必須有嫻熟的竅門，調理好真空度，以得到契合規劃請求的概括和尺寸共同的商品。
In the use of this method for processing, the operator must have a knack for skilled, vacuum conditioning, in order to meet the requirements of the general plan and the size of the common commodity.
2. 真空陰模成型。真空陰模成型進程如圖所示。真空陰成型法出產的成品與模腔壁貼合的一面質量較高，構造上也對比明顯詳盡，壁厚的最大部位在模腔底部，最薄部位在模腔旁邊面與底面的接壤處，并且隨模腔深度的增大成品底部轉角處的壁就變得更薄。因而真空陰模成型法不適于出產深度很大的成品。
2 vacuum molding. Vacuum molding process as shown in figure. The product and mold wall joint produced vacuum forming method of high quality Yin side, the structure is also obvious contrast in detail, the wall thickness of the largest position in the cavity at the bottom of the thinnest parts in the mold cavity near the surface and the bottom surface of the border, and with the increase of cavity depth at the bottom corner of the finished wall becomes more thin. Thus the vacuum molding method is not suitable for the production of large depth of finished products.
3. 真空陽模成型。真空陽模成型工藝進程。本法關于制作壁厚和深度較大的成品對比有利。成品的首要特點是：與真空陰模成型法相同，模腔壁貼合的一面質量較高，構造上也對比明顯詳盡。壁厚的最大部位在陽模的頂部，而最薄部位在陽模旁邊面與底面的接壤區，該部位也是最終成型的部位，成品旁邊面常會呈現牽伸和冷卻的條紋，形成條紋的因素在于片材各有些貼合模面的時分有先后之分。先與模面觸摸的有些先被模具冷卻，而在后繼的相關進程中，其牽伸做法較未冷卻的部位弱。這種條紋通常在挨近模面頂部的旁邊面處最高。
3 vacuum forming mold. The vacuum mold molding process. This method is advantageous to the production of the wall thickness and the depth of the larger finished products. The main characteristics of the finished product is: the same as the vacuum molding method, the cavity wall of the side of the high quality, the structure is also more obvious contrast. The wall thickness of the largest position in the top of the mold, and the thinnest part in the male side surface and the bottom surface of the border area, the site is also the final shape of the finished parts, side surface often appears stretching and cooling stripes, stripes form factor is the sheet die surface when there is some attached priority. Some of the first contact with the mold surface is cooled by the mold, and in the subsequent related processes, the drafting of the cooling part of the weak. The stripes are usually highest near the top of the die face.
 

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