METHOD OF PACKING OF PET PREFORMS AND A DIE FOR PACKING PET PREFORMS

Abstract: The method of packing of PET preforms and a die for packing PET preforms are the object of the invention. The method of packing PET preforms is characterised by the fact that the die is provided with groups of cavities of the same amount and or comparable depth that are simultaneously filled up with the same of preforms in such an arrangement that the upper parts of the lower preforms are in contact with the bottom of the upper preforms, and when the specified level of the packing is reached, the next groups of cavities of the same depth are filled up, and then, the activity is repeated with regard to the next group of cavities of the same depth. The die for packing PET preforms is characterised by the fact that the die is provided with groups of cavities (<u>2</u>), (<u>3</u>) and (<u>4</u>) of the identical outline, whose geometrical centres intersect at alpha angle of 60 DEG , and each of the groups (<u>2</u>), (<u>3</u>) and (<u>4</u>) has different depth and each internal cavity (<u>2</u>) preferably borders on three cavities (<u>3</u>) and on three cavities (<u>4</u>), and each internal cavity (<u>3</u>) preferably borders on three cavities (<u>2</u>) and on three cavities (<u>4</u>) and each internal cavity (<u>4</u>) preferably borders on three cavities (<u>2</u>) and on three cavities (<u>3</u>).

Description: METHOD OF PACKING OF PET PREFORMS AND A DIE FOR PACKING PET PREFORMS Method of packing of PET preforms and a die for packing PET preforms are the object of the invention. Until now, after being moulded on the injection moulding press, the preforms have been thrown down into a container. When the container is filled up, the preforms are moved to a bulk container and in such a form they are delivered to the customers for further processing. Due to their incidental arrangement, the capacity of the bulk containers is small. The purpose of the invention is developing a method of packing preforms that will enable increasing their amount in the bulk containers by approximately 20 to 25% and working out a die for implementation of this method. The method of packing PET preforms is characterised by the fact that the die is provided with groups of cavities of the same and/or comparable depth that are filled up at the same time with the same amount of preforms in such an arrangement that the upper parts of the lower preforms are in contact with the bottom of the upper preforms; when the specified level of the packing is reached, the next groups of cavities of the same and/or comparable depth are filled up, and then, the activity is repeated with regard to the next group of cavities of the same and/or comparable depth. The die for packing PET preforms is distinguished by the fact that it has the groups of cavities of the same outline, and their geometrical centres intersect at angle of 60°, and each group has different depth, and each internal cavity of a first group preferably borders on three cavities of a second group and on three cavities of the third group while each internal cavity of the second group preferably borders on three cavities of the first group and on three cavities of the third group, and each internal cavity of the third group preferably borders on three cavities of the first group and on three cavities of the second group. The groups of cavities are preferably of circular outline, whose geometrical centres intersect at the α angle of 60°, and each group has different depth, and each internal cavity of a first group preferably borders on three cavities of a second group and on three cavities of the third group while each internal cavity of the second group preferably borders on three cavities of the first group and on three cavities of the third group, and each internal cavity of the third group preferably borders on three cavities of the first group and on three cavities of the second group. The groups of cavities, preferably of polygon outline, whose geometrical centres intersect at the α angle of 60°, and each group has different depth, and each internal cavity of a first group preferably borders on three cavities of a second group and on three cavities of the third group while each internal cavity of the second group preferably borders on three cavities of the first group and on three cavities of the third group, and each internal cavity of the third group preferably borders on three cavities of the first group and on three cavities of the second group. The groups of cavities, preferably of outline of regular polygon, whose geometrical centres intersect at the α angle of 60°, and each group has different depth, and each internal cavity of a first group preferably borders on three cavities of a second group and on three cavities of the third group and each internal cavity of the second group preferably borders on three cavities of the first group and on three cavities of the third group, and each internal cavity of the third group preferably borders on three cavities of the first group and on three cavities of the second group. The cavities of the first group preferably have the same depth, different from that of the cavities of the second or the third group; the cavities of the second group preferably have the same depth, different from that of the cavities of the first or the third group; the cavities of the third group preferably have the same depth, different from that of the cavities of the first or the second group. Example: A group of three cavities of cylinder shape, of the same depth, is simultaneously filled up with the same number of preforms, in such an arrangement that the upper parts of the lower preforms are in contact with the bottom of the upper preforms. When the specified level of the packing is reached, the second group of cavities of cylinder shape and of the same depth is to be filled up, and the flanges of the previously packed preforms serve as a guide for the preforms of the second group that are being packed. When the specified level of the packing is reached, the third group of cavities of cylinder shape and of the same depth is to be filled up, and the flanges of the previously packed preforms serve as a guide for the preforms of the third group that are being packed. The exemplary die built according to the invention is presented in the enclosed drawing, where in Fig. 1 the die is shown in the section tlirough the groups of cavities of cylinder shape; and in Fig. 2 the top view of the die with the cavities of cylinder shape is shown; and in Fig. 3 we have the top view of the die with the cavities of a shape of regular prism with a hexagonal base. As it is shown in the drawing, die 1 has a series of cavities 2, 3 and 4 of the differentiated depth, into which preforms 5 are introduced, preferably ones with flanges 6. The groups of cavities 2 have the same depth or their depth is slightly differentiated, however, it is much different than that of the other groups of cavities 3 and 4, out of which the groups of cavities 3 have the same depth or their depth is slightly differentiated but it is much different from that of the remaining groups of cavities 2 and 4, where similarly, groups of cavities 4 have the same depth or their depth is slightly differentiated but considerably different from that of other groups of cavities 2 and 3. Geometrical centres of the neighbouring cavities 2, 3 and 4_intersect at the angle of 60°.

Claims: Patent claims l.The method of packing PET preforms distinguished by the fact that the die is provided with groups of cavities of the same and/or comparable depth that are simultaneously filled up with the same amount of preforms in such an arrangement that the upper parts of the lower preforms are in contact with the bottom of the upper preforms, and when the specified level of the packing is reached, the next groups of cavities of the same and/or similar depth are filled up, and then, the activity is repeated with regard to the next group of cavities of the same and/or comparable depth. 2. The die for packing PET preforms distinguished by the fact that the die is provided with groups of cavities (2), (3) and (4) of the identical outline whose geometrical centres intersect at α angle of 60°, and each of the groups (2), (3) and (4) has different depth and each internal cavity (2) preferably borders on three cavities (3) and on three cavities (4), and each internal cavity (3) preferably borders on three cavities (2) and three cavities (4) and each internal cavity (4) preferably borders on three cavities (2) and three cavities (3). 3. The die according to the claim 2 distinguished by the fact that it has the groups of cavities (2), (3) and (4) preferably of the circular outline, whose geometrical centres intersect at α angle of 60°, and each of the groups (2), (3) and (4) has different depth and each internal cavity (2) preferably borders on three cavities (3) and on three cavities (4), and each internal cavity (3) preferably borders on three cavities (2) and three cavities (4) and each internal cavity (4) preferably borders on three cavities (2) and three cavities (3). 4. The die according to the claim 2 is distinguished by the fact that it has the groups of cavities (2), (3) and (4) preferably of the outline of a polygon, whose geometrical centres intersect at α angle of 60°, and each of the groups (2), (3) and (4) has different depth and each internal cavity (2) preferably borders on three cavities (3) and on three cavities (4), and each internal cavity (3) preferably borders on three cavities (2) and three cavities (4) and each internal cavity (4) preferably borders on three cavities (2) and three cavities (3). 5. The die according to the claim 2 or 4 distinguished by the fact that it has the groups of cavities (2), (3) and (4) preferably of the outline of a regular polygon, whose geometrical centres intersect at α angle of 60°, and each of the groups (2), (3) and (4) has different depth and each internal cavity (2) preferably borders on three cavities (3) and on three cavities (4), and each internal cavity (3) preferably borders on three cavities (2) and three cavities (4) and each internal cavity (4) preferably borders on three cavities (2) and three cavities (3). 6. The die according to the claim 2 or 3 or 4 or 5 distinguished by the fact that cavities (2) preferably have identical depth, different from that of cavities (3) or cavities (4); cavities (3) preferably have identical depth, different from that of cavities and (2) or cavities (4); and cavities (4) preferably have identical depth, different from that of cavities (2) or cavities (3).

Inventors: GLUCH MIROSLAW, KARCH JAN, GLUCH, MIROS&LSTROK, KARCH, JAN
Applicants: GLUCH MIROSLAW, KARCH JAN, GLUCH, MIROS&LSTROK, KARCH, JAN
Application year: 2000
Main classification: B65B23
IPC codes: B29C49, B65B23, B65D71