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Method and mould for manufacturing pellets of hot-melt ink

A technology of hot melt ink and mold, applied in printing and other directions, can solve problems such as increasing cost

Inactive Publication Date: 2008-01-30
OCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, besides the added cost, it should be observed that most of the pellets are also out of specification, because the protrusions can only be partially removed, or because the removal of the protrusions simultaneously creates a large number of pores in the pellet

Method used

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  • Method and mould for manufacturing pellets of hot-melt ink
  • Method and mould for manufacturing pellets of hot-melt ink
  • Method and mould for manufacturing pellets of hot-melt ink

Examples

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Embodiment Construction

[0024]Figure 1 is a top view and a cross-sectional view along line AA' of a multi-mold having a plurality of cavities and a plurality of corresponding filling holes. To illustrate multiple molds and mold methods, four mold cavities 1 and four corresponding filling holes 2 are shown. The multi-mold consists of four dies that are fastened but also detachably joined to each other by connecting means such as screws (not shown). In practice, hundreds or thousands of cavities may be provided. All four molds have a general box shape and are made of steel. Other metals, such as aluminum, may also be used. Other materials, such as plastics, can also be used as long as they have high thermal conductivity and can withstand temperatures up to 150° C. without deformation. A flat conical perforation is provided in the first mold 3 . These perforations are referred to as filling holes 2 . The filling hole has its smallest dimension at the interface with the second mold, which defines th...

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Abstract

A method and a mould for manufacturing pellets of hot-melt ink are disclosed. In particular use is made of a multiple mould comprising at least three dies detachably attached one to another which define mould cavities and corresponding filling holes. In the moulding process, the cavities are overfilled such that after solidification ink protrudes in the filling openings formed in a single die. Prior to removal of the pellets from the mould cavities, the die containing the protrusions is separated from the other dies. Hence the ink pellets formed are substantially free of holes and / or protrusions hampering the free flow of such pellets when introduced in a dosing system.

Description

technical field [0001] The present invention relates to a method and mold for making hot melt ink particles. Background technique [0002] For example, various types of inkjet printers use so-called hot melt inks, ie waxy ink materials which are solid at room temperature and have a melting point of 100°C or 120°C. In the print head of the printing press, the ink is heated above its melting point so that liquid ink droplets can be ejected through the nozzles of the print head. In order to obtain high quality printed images, the viscosity and temperature of the molten ink in the printhead should be kept substantially constant. However, due to the consumption of ink during the printing process and the limited size of the ink container holding the liquid ink in the print head, the printing operation needs to simultaneously supply and melt the solid ink, and the latent heat of the melting ink tends to lower the temperature in the ink container. For this reason, the amount of so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/10B29C33/00B29C33/44B29C39/26
CPCB41J2/17593B29C37/0003B29C33/44B29C39/26B29C33/0055B29B9/10
Inventor F·H·M·汤马森H·M·J·哈贝茨
Owner OCE TECH
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