Nested Dual-Volume Color Paste Pump for Accurate Micro Dosing
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Solution Overview
Problem
Current reciprocating pumps face challenges in accurately dispensing both large and small volumes of colorant due to high errors in small volume dispensing, leading to undesirable color variations and increased costs and complexity in using multiple pumps or complex structures to achieve both functions.
Innovation Solution
A reciprocating positive displacement pump design featuring a large-section cylinder body with a small pump body integrated on its base, utilizing control valves to connect with a canister for efficient dispensing of both large and small volumes, ensuring high accuracy and leakproofness while minimizing elastic deformation and space occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large reciprocating pump is used for dispensing large volume of colorant, then dispensing efficiency is improved, but dispensing accuracy for small volume deteriorates
Solution Approach 1:
The pump system is segmented into two independent pumping units: a large reciprocating pump for large-volume dispensing and a small reciprocating pump for small-volume dispensing. Each pump operates independently with its own cylinder body, piston, and control mechanism, allowing selective activation based on required dispensing volume to maintain accuracy across different scales.
Solution Approach 2:
The small reciprocating pump is nested within the base of the large reciprocating pump's cylinder body. The small pump's cylinder body is disposed on the base of the large pump body, creating a compact integrated structure where the smaller system is housed within the footprint of the larger system, optimizing space utilization.
2Manufacturing precision
If two separate colorant dispensers are disposed for large and small volume dispensing, then dispensing accuracy is improved, but device complexity and cost increase
Solution Approach 1:
Two separate colorant dispensers are merged into a single integrated pump device. The large reciprocating pump and small reciprocating pump share common structural elements including the control valve system, drive mechanism, and housing structure. This consolidation maintains the dispensing accuracy benefits of having separate pumps while reducing overall system complexity and eliminating the need for two independent dispenser units.
3Adaptability or versatility
If a pair of pumping-out systems are disposed in parallel, then both large and small volume dispensing capabilities are achieved, but space occupation and structure complexity increase
Solution Approach 1:
The small reciprocating pump system is nested within the base area of the large reciprocating pump's cylinder body. The small pump's cylinder body is disposed on the base of the large pump body, allowing both pumping systems to occupy overlapping spatial footprints. This nesting arrangement enables the system to achieve dual dispensing capabilities while minimizing the overall space occupation compared to parallel discrete pump arrangements.
Data Source
Figure 1a~2a
Figure 2b~3a
Figure 3b~3d
AI summary
A pump capable of dispensing both a large volume and a small volume of colorant comprises a large reciprocating positive displacement pump having a large reciprocating part, a large pump body and a large pump inlet-outlet opening, characterized in that: a small reciprocating part fixed to the large reciprocating part is disposed in the large pump body; a small pump body is disposed on a base of the large pump body, and provided with a small pump inlet-outlet opening; and the small reciprocating part, the small pump body and the small pump inlet-outlet opening constitute a small reciprocating positive displacement pump. The reciprocating positive displacement pump provided in the present invention may achieve dispensing of both a large volume and a small volume of colorant by means of a large-section pump, and thus guarantees the accuracy of the dispensed volume of colorant, and in particular, the accuracy of dispensing of a small volume of colorant; and the reciprocating positive displacement pump, when compared with the prior art, has the advantages of high accuracy and simple structure, and when compared with the structure in patent No. US2009236367A1, has the advantages of good leakproofness, high utilization of a reciprocating pump cylinder body in the length direction, and improved stroke accuracy of the reciprocating pump due to less elastic deformation of a pump support.