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Mould for blowing vessels with reinforced bottom

A technology for molds and containers, applied in the field of molds for blowing containers with reinforced bottoms, can solve problems such as unsuitable containers

Inactive Publication Date: 2014-07-09
SIDEL PARTICIPATIONS SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other cases, the container is unsuitable and must be discarded

Method used

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  • Mould for blowing vessels with reinforced bottom
  • Mould for blowing vessels with reinforced bottom
  • Mould for blowing vessels with reinforced bottom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Example 1 ( Figures 6 to 11 )

[0077] As already mentioned, the mold 1 has a wall 2 which delimits a cavity 3 arranged around the main axis 4 of the mold 1 .

[0078] An opening 5 is arranged in the lower part of the mold 1 to allow the passage of a mold bottom 6 mounted movably relative to the wall 2 in the Figure 6 and 8 The low bits shown with the Figure 9 Between the high positions shown, in the low position the mold bottom 6 leaves the opening 5 downwards and in the high position the mold bottom 6 closes the opening 5 .

[0079] As already mentioned, in its high position, the mold bottom 6 closes the cavity 3, forming a cavity against which the blank 8 rests during blowing.

[0080] On the contrary, it differs from the known embodiment in that the cavity of the bottom 14 of the container 9 is formed entirely on the mold bottom 6 , more precisely by its upper surface 7 .

[0081] In fact, if Figure 5 shown, and in Figure 6 Shown in more detail above, th...

Embodiment 2

[0088] Example 2 ( Figures 12 to 17 )

[0089] For the sake of brevity, arrangements common to the first embodiment are not described again (corresponding reference numerals are used in the drawings).

[0090] This second embodiment differs from the first in that in the lower part of the wall 2 around the opening 5 there is a raised annular flange 18 of small radial extent, the upper surface 19 of which is substantially perpendicular to the axis 4. It extends in a transverse plane and forms the cavity of the base 28 of the container 9 .

[0091] In other words, there is a slight radial offset between the lower end 21 of the side surface 17 of the wall 2 and the upper edge 22 of the opening 5 . More precisely, the ratio between the transverse dimension B of the upper edge 22 of the opening 5 and the transverse dimension A of the lower end 21 of the side surface 17 is greater than 0.95. In the illustrated embodiment, this ratio is approximately 0.98.

[0092] The angular re...

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Abstract

The invention relates to a mold (1) for blowing a container (9) from a blank of plastics material, said container (9) having a body (13) and a bottom (14), the mold (1) having a wall (2) , the wall (2) defines a cavity (3), the cavity (3) is arranged around the main axis (4) of the mold (1), and the wall (2) has a side surface (17) , the side surface (17) is used to give the shape of the side surface (17) to the main body (13) of the container (9), the wall (2) has an opening (5) in the lower part, the opening (5) defining channels for a mold bottom (6) whose upper surface (7) is used to at least partially impart the shape of said upper surface (7) to said container (9) Bottom (14), the opening (5) has an upper edge (22); this mold is characterized in that, in any plane containing the axis (4) of said wall (2): the ratio between the transverse dimension (B) of the upper edge (22) and the transverse dimension (A) of the lower end (21) of the side surface (17) of said wall (2) is greater than 0.95, and the A tangent to the side surface (17) at its lower end (21) forms an angle (α) less than or equal to 30° with the axis (4) of said wall (2).

Description

technical field [0001] The present invention relates to the manufacture of containers, such as bottles or cans, which are blown or blown from thermoplastic material blanks. Background technique [0002] The manufacture of containers by blow molding begins by heating the blank (the blank refers to the preform or the intermediate container that undergoes the first blowing operation from the preform) at a temperature above the glass transition temperature of the material of which the blank is composed. Next, insert the blank into the mold, and then inject high-pressure gas (such as air) (generally greater than 30 bar) to blow the blank. [0003] In addition to blowing, blow-drawing technology also consists in drawing the blank with a slide bar to minimize the eccentricity of the container and to make the material distribution as uniform as possible. [0004] The mold has a wall defining a cavity for giving the container body its shape. The cavity is closed at the lower end by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C49/48B65D1/02
CPCB29C49/12B29C2049/4892B29C49/06B65D1/0261B29C49/48B29C49/5612B29C2949/0715B29C2049/7831B29C2049/7832
Inventor M·德里安M·布科布扎
Owner SIDEL PARTICIPATIONS SAS