Dosing Dispenser Prefabricated Piston Assembly for Sealing

Solution Overview

Problem

Existing dosing dispensers for pasty or viscous materials require multiple workstations for piston insertion and sealing, leading to increased manufacturing costs and variability in filling volumes due to tolerances and material batches, which affects the dispensing behavior and product quality.

Innovation Solution

A prefabricated assembly unit comprising a shutter button and piston, where the piston is axially disposed opposite the shutter button, allowing for one-operation insertion into the cartridge, with a central punch and locking ball mechanism that ensures proper sealing and air discharge, reducing relative displacement until the piston abuts the material column, thus simplifying the assembly process and maintaining product quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple workstations are used for piston insertion and sealing operations, then the sealing and locking functions can be properly accomplished, but the manufacturing cost increases and the assembly process becomes more complex

Engineering Contradiction:

Improvesealing qualityVSAvoidassembly process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The shutter button and piston are pre-assembled into a single integrated assembly unit. The shutter button includes a piston insertion guide that directly guides the piston into the cartridge during a single insertion operation, combining what were previously separate workstation operations into one unified action.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The piston is pre-positioned on the shutter button in a predetermined position before insertion into the cartridge. The shutter button structure includes a guide that pre-aligns the piston with the cartridge opening, ensuring proper positioning before the actual insertion occurs.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple workstations are used for piston insertion and sealing operations, then the sealing and locking functions can be properly accomplished, but the manufacturing time and cost increase

Engineering Contradiction:

Improvesealing qualityVSAvoidassembly speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The shutter button and piston are pre-assembled into a single integrated assembly unit. The shutter button includes a piston insertion guide that directly guides the piston into the cartridge during a single insertion operation, combining what were previously separate workstation operations into one unified action.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The piston is pre-positioned on the shutter button in a predetermined position before insertion into the cartridge. The shutter button structure includes a guide that pre-aligns the piston with the cartridge opening, ensuring proper positioning before the actual insertion occurs.

Inventive Principle:

Principle #10Preliminary action

3Quantity of substance

If the filling volume varies due to tolerances and material batches, then the minimum filling amount can be accommodated, but the piston position becomes inconsistent affecting dispensing behavior

Engineering Contradiction:

Improvefilling volumeVSAvoidpiston position accuracy

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The piston automatically positions itself relative to the material column through the mechanical interaction between the piston, the material column, and the shutter button guide structure. The system self-adjusts to accommodate filling variations without requiring external positioning mechanisms.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The design allows the piston position to vary within acceptable ranges to accommodate filling volume variations. The shutter button guide structure and piston geometry are designed to maintain functional sealing and locking across a range of piston positions resulting from filling tolerances.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10888889B2System having a dosing dispenser for dispensing pasty or viscous material

Publication Date: 2021.01.12 DUAL DISPENSERS

AI summary

The invention relates to a system having a dosing dispenser for dispensing pasty or viscous material with a housing, a cartridge displaceably accommodated therein and a walking piston accommodated in the cartridge that forms a unit ready for assembly with a shutter button to be arranged at a cartridge end.