Method for producing thermal-formation products of plastic sheet material

A technology of composite plastics and production methods, which is applied in the field of production of composite plastic sheet thermoformed products, can solve the problems of high printing cost, complicated printing process, and easy contamination of food, and achieve low printing cost, simple pattern printing process, and avoid Effects of Contaminated Food

Active Publication Date: 2009-04-08
广东日烽吸塑包装实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional production method of plastic sheet thermoforming products is generally to print the pattern after the product is thermoformed, which has the following problems: 1. Due to the uneven shape of the blow-molded product or the blister product, it is not possible to use ordinary printing technology on the blow-molded product or Printing on the surface of blister products can only use a special printing process, so the printing process is complicated and the printing cost is high; 2. The pattern printing layer is located on the surface of the product, making the printed pattern layer easy to wear, fall off, and fade. When printing food, the printed pattern layer is also easy to contaminate the food

Method used

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  • Method for producing thermal-formation products of plastic sheet material
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  • Method for producing thermal-formation products of plastic sheet material

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] This embodiment adopts blow molding process (positive pressure molding process) to manufacture plastic cups, figure 1 As shown, the blow mold 1 selected in this embodiment has 12 mold cavities 11 in total, and the mold cavities 11 are divided into two rows and six columns, the row spacing is m, and the column spacing is n; the production method of this embodiment includes the following main steps in sequence : (1), a plurality of plum blossom patterns 21 are printed on one side of the transparent plastic film 2, and the patterns are divided into multiple groups, and the number of plum blossom patterns in each group equals the number of mold cavities in the blow mold, which is 12, The patterns 21 of each group are distributed into two rows and six columns, the row spacing of the patterns in each group is correspondingly equal to the row spacing m of the mold cavity in the mould, and the column spacing of the patterns in each group is correspondingly equal to the column sp...

Embodiment 2

[0021] This embodiment adopts the plastic-absorbing process (vacuum negative pressure forming process) to manufacture plastic handicrafts. The main steps of this embodiment are basically the same as those in Embodiment 1, except that this embodiment adopts the plastic-absorbing process to form, and the cavities in the mold are only arranged in a row. Each group of patterns printed in the plastic film is also distributed in a row, and the horizontal spacing of the patterns in each group corresponds to the horizontal spacing of each cavity in the mould; and an opaque plastic sheet is used to compound with a transparent plastic film. The plastic product that this embodiment obtains is plastic handicraft 5, and the shape of its center is close to tortoise shell shape, as Figure 5 As shown, the tortoise shell-shaped central position is printed with a pattern.

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Abstract

A thermally shaping method for preparing the product from plastic sheet includes such steps as printing patterns and locating marker on transparent plastic film, attaching the plastic film onto surface of a plastic sheet, heating the plastic sheet for softening it, moving it into a moulding cavity, applying pressure to make it close to the inner surface of moulding cavity, cooling, demoulding and punch shearing.

Description

technical field [0001] The invention belongs to a method for producing plastic products, in particular to a method for forming plastic products with concave-convex shapes through thermoforming of plastic sheets. Background technique [0002] Plastic sheets can be thermoformed to make thermoformed products, including blow molded or blistered products. Plastic sheet thermoforming adopts blow molding process or blister process. The blow molding process or the blister process is to heat the plastic sheet to soften it, and then use positive pressure air or vacuum negative pressure to make the plastic sheet adhere to the inner wall of the mold cavity to form a concave-convex shape blow molding product or blister product. Some plastic sheet thermoformed products need to be printed with patterns or characters. The traditional production method of plastic sheet thermoforming products is generally to print the pattern after the product is thermoformed, which has the following proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C51/10B29C51/46B29C51/14B29C51/26B29B11/04
Inventor 许小飞
Owner 广东日烽吸塑包装实业有限公司
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