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Decorative forming method and decorative forming device

A molding and injection molding technology, applied to other household appliances, coatings, household appliances, etc., can solve the problems of deterioration of appearance quality, offset of relative positional relationship, and inability to peel off normally, and achieve the effect of improving appearance quality

Active Publication Date: 2021-09-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Even if the convex-concave layer of the decorative sheet is made flexible, wrinkles are generated due to the air layer between the sheets and the difference in expansion and contraction of the sheet during injection molding. As a result, the wrinkles are transferred to the surface of the molded product, resulting in The problem of deterioration of appearance quality
[0014] In addition, when the decorative sheet is peeled off, it may not be peeled off normally, and wrinkles are generated when the used decorative sheet is wound, which affects the next molded product.
And / or during the next forming, when the decorative sheet is adsorbed and fixed on the first mold, the relative positional relationship between the convex-concave layer and the pattern layer of the decorative sheet is shifted due to the influence of the wrinkles , further deteriorating the appearance quality

Method used

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  • Decorative forming method and decorative forming device
  • Decorative forming method and decorative forming device
  • Decorative forming method and decorative forming device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] figure 1 , figure 2 of (a), figure 2 of (b), image 3 Shown is a decoration forming apparatus for realizing the decoration forming method of the present invention.

[0035] The mold 1 is composed of a first mold 1a and a second mold 1b that form a cavity formed between a concave portion 2 of the first mold 1a and a convex portion 3 of the second mold 1b by mold closing. The strip-shaped first sheet 4 with unevenness on the surface and the strip-shaped second sheet 5 with a pattern on the surface are fed to the mold 1 by intermittent transfer in synchronization with the molding cycle. The sheet 4 and the sheet 5 are arranged such that the sheet 4 is on the side of the first mold 1a. Marks are formed on the sheet 4 and the sheet 5 at predetermined intervals along the longitudinal direction for detecting the supply amount.

[0036] In Embodiment 1, if figure 2 As described in (a), the sheet width of the sheet 4 is narrower than that of the sheet 5 . Although it ...

Embodiment approach 2

[0080] Figure 7 (a) and (b) show the main part of the decoration forming device when there is no margin in the sheet width with respect to the molded product. In this case, it is necessary to set the sheet 4 and the sheet 5 to the same size.

[0081] When there is no margin in the sheet width with respect to the molded product, the sheet 4 is provided with holes 42 for adsorption of the adsorption sheet 5 . Thus, the air between the first mold 1a and the sheet 4 is sucked by the vacuum pump 22 and the vacuum suction circuit 23 to realize adsorption, and the air between the sheet 4 and the sheet 5 is sucked by the vacuum pump 28 and the vacuum suction circuit 29, thereby enabling The sheets 4 and 5 are adsorbed and fixed on the first mold 1a.

[0082] On the other hand, when the sheet is released from the mold, although not shown, as in Embodiment 1, the sheet 5 is first vacuum-broken by an independently installed air blowing circuit, and the sheet 5 is peeled off from the s...

Embodiment approach 3

[0084] Figure 8 (a) and (b) show a specific example in which a mark applied to a sheet is detected in the first die 1a, and a shift amount is calculated to perform alignment.

[0085] In the sheet 4 , a logo 44 as a first logo is printed on the base sheet 43 . In this case, the base sheet 43 is preferably a transparent sheet such as PET. In addition, the mark 44 is preferably made of a material that does not transmit light.

[0086] In the sheet 5 , a logo 46 as a second logo is printed on the base sheet 45 . In this case, the base sheet 45 is preferably a sheet of PET or the like. In addition, the mark 46 is preferably made of a material that does not transmit light.

[0087] A reflection plate 49 is provided inside the first mirror box 48 . A reflection plate 51 is provided inside the second mirror box 50 .

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Abstract

An object of the present invention is to provide a decoration forming method and a decoration forming apparatus capable of transferring a convex-concave shape to a pattern layer with high precision. In the decorative forming method of the present invention, the sheet (4) printed with convex and concave shapes and the sheet (5) printed with patterns are supplied independently to the mold (1), the sheets (4, 5) are positioned independently, and The mold (1) injects the molding material and performs injection molding at the same time. The decorative molding device for realizing the decorative molding method is characterized in that a suction circuit for each sheet adsorption and a blower circuit for peeling off the sheet are arranged on the sheet adsorption surface of the mold, and after the injection molding, from the opening of the mold (1) Start blowing air to each sheet independently from the start moment, set the mold and sheet into a positive pressure state, then take out the molded product, open the clamping jig (6) to demould the sheet, and continue blowing until the sheet (4 , 5) The next pattern is set in the mould.

Description

technical field [0001] The present invention relates to a decorative molding method and apparatus for transferring a pattern having a convex-concave shape to the surface of a resin-molded molded product using a decorative sheet. Background technique [0002] In the decorative molding apparatus described in Patent Document 1 and the like, a mold for injection molding a resin material is constituted by a first mold and a second mold, and a decorative sheet is inserted between the first mold and the second mold in the mold-opened state. , and inject resin onto the decorative sheet in a closed mold state, so that while forming a high-precision injection molded body, the decorative film and functional film printed or laminated on the decorative sheet are transferred to the molded body. [0003] For the decorative forming step, first, the roll-shaped decorative sheet has been printed or transferred, laminated with a decorative film or a functional film, and the decorative sheet is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/14
CPCB29C45/14065B29C45/14688B29C2045/14155B29C2045/14713B29C45/14016B29C45/14827B29C2045/14704B29K2667/003B29C2045/14696B29C2045/1477B29K2995/0026B29L2031/722
Inventor 平石正和金内和彦
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD