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Methods of forming monolithic serological pipettes

A technology for pipettes and chambers, applied in the field of forming integral serological pipettes, which can solve the problems of increased manufacturing time, waste of materials, and increased cost of parts

Active Publication Date: 2021-12-31
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, conventional cutting techniques lead to increased manufacturing time, lead to wasted material and lead to increased part cost

Method used

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  • Methods of forming monolithic serological pipettes
  • Methods of forming monolithic serological pipettes
  • Methods of forming monolithic serological pipettes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] according to Figure 7 The blow molding method shown for integral pipettes, manufactures 10ml and 25ml pipettes. The cold preform is inserted into the blow mold and pressurized (10 psi to 20 psi), then heated with radiant heat from the mould. The process takes approximately 40 minutes to heat the mold, expand the mold and cool the mold. Remove parts and measure.

[0061] Table II shows the inner diameter (ID), outer diameter (OD) and thickness measurements (in mm) of the tip portion, body portion and spout portion of these experimental pipettes.

[0062] Table II

[0063]

[0064] As can be seen from Table II, the tip and spout thicknesses of the experimental pipettes manufactured by blow molding were greater than the body thickness. These measurements are consistent with the thicknesses expected using modeling.

[0065] Table III shows the modeling using blow molding (according to Figure 7 expected measured value for the method shown). The calculated final d...

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Abstract

A method for producing a pipette (110, 111, 112) is provided. The method includes extruding a polymer melt into at least one mold section of a mold assembly (120) having a plurality of mold sections to form a parison (50) or preform, wherein the plurality of mold sections The mold section (122) contains cavities (42) which are shaped to form pipettes as the cavities communicate with the cavities of adjacent mold sections; by blow molding a parison or preform or vacuum forming to form at least two pipettes in the shape of a mold segment cavity, each of the at least two pipettes having a proximal end and a distal end; heating the pipettes to form the Locally heated portions of at least two pipettes; and separating the pipettes by cutting the locally heated portions of the at least two pipettes with a separation feature (64, 66, 194, 196).

Description

[0001] This application claims the benefit of priority to U.S. Provisional Application Serial No. 62 / 511,124, filed May 25, 2017, which is based upon the contents of that application and is incorporated by reference in its entirety as if fully set forth below. technical field [0002] The present disclosure generally relates to monolithic serological pipettes and methods of forming them, such as blow molding or vacuum forming. Background technique [0003] Serological pipettes are used in both research laboratories and manufacturing plants to transfer liquid volumes, typically less than about 1.0 ml up to about 100 ml. While some pipettes are formed of sterilizable glass and are reusable, most pipettes are formed of sterile plastic and are disposable. [0004] Although there are various known methods of assembly, these plastic pipettes can be made from polymers by known techniques such as injection molding, profile extrusion, rotational molding, thermoforming, casting, melt ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C49/04B29C49/42B29C49/36B29C49/50B29L31/00B29K25/00B29K23/00B29C49/24
CPCB29L2031/753B29K2023/12B29K2025/06B29C49/04B29C49/36B29C49/4268B29C49/4278B29C49/50B29C2049/2412B29C2793/0027B29C2793/009B01L3/021B01L2200/12B29L2023/007B01L2300/0832B01L2300/0858B29C49/24
Inventor J·C·小卡多特M·K·谢弗J·M·塞莫尔A·M·泽曼
Owner CORNING INC