Molding Unit Squeeze Cylinder Nested Guide Structure

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Solution Overview

Problem

Existing molding machines require multiple actuators to achieve uniform squeezing, leading to increased manufacturing costs and potential interference between guide members, which complicates the stable positioning of squeeze members and flasks, making it difficult to produce high-quality molds.

Innovation Solution

A molding unit with a movable squeeze cylinder and guide members that allow the first squeeze member to enter both flasks using one actuator, while the second squeeze member is fixed by a guide member, enabling stable support and reducing the need for multiple actuators, thus avoiding interference and maintaining molding accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If two actuators are used to perform squeezing, then uniform squeezing is achieved, but manufacturing cost increases

Engineering Contradiction:
Improvesqueezing uniformityVSAvoidmanufacturing cost
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent divides the squeezing function into two independent squeeze members (first squeeze member and second squeeze member), each capable of entering and squeezing the upper and lower flasks separately. This segmentation allows one actuator to control both members independently, achieving uniform squeezing while reducing the number of actuators required, thus resolving the contradiction between squeezing uniformity and manufacturing cost.

Inventive Principle:
Principle #1Segmentation

2Ease of manufacture

If one actuator is used to reduce cost, then manufacturing cost decreases, but guide member interference occurs

Engineering Contradiction:
Improvemanufacturing costVSAvoidguide member arrangement
Core Design Contradiction:
Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent employs a nested guide member structure where the squeeze guide member is disposed inside the flask guide member. This nesting arrangement allows both guide members to coexist in the same space without interference, enabling the use of one actuator to control both squeeze members while maintaining proper guidance and avoiding structural conflicts, thus resolving the contradiction between cost reduction and device complexity.

Inventive Principle:
Principle #7Nested doll (Nesting)

3Stability of the object's composition

If guide member position is optimized for squeeze member support, then stable positioning is achieved, but interference with flask guide member occurs

Engineering Contradiction:
Improvesqueeze member positioning stabilityVSAvoidguide member arrangement
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The nested guide member configuration allows the squeeze guide member to be positioned inside the flask guide member, providing stable support for the squeeze members at the optimal location without interfering with the flask guide member's function. This resolves the contradiction between achieving stable squeeze member positioning and avoiding guide member interference.

Inventive Principle:
Principle #7Nested doll (Nesting)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution reduces manufacturing costs by using one squeeze cylinder while ensuring accurate and uniform squeezing, allowing for stable positioning of guide members and flasks, thereby improving mold quality and reducing interference.

Implementation Method 1

Each of the upper actuator and the lower actuator is a hydraulic cylinder extending and contracting a rod, for example.

Methodology Applied
Scientific EffectHydraulic cylinder extension and contraction: Hydraulic Press

Implementation Method 2

the squeeze cylinder is disposed to be movable relative to the upper and lower flasks, and therefore is moved in the opposite direction of the squeezing direction of the first squeeze member by the reactive force obtained through the first squeeze member

Methodology Applied
Scientific EffectReactive force: Reaction (physics)

Data Source

PatentUS11883980B2Molding unit, molding machine, and molding method
Publication Date: 2024.01.30 SINTOKOGIO LTD
  • US11883980B2 patent drawing
  • US11883980B2 patent drawing
  • US11883980B2 patent drawing

AI summary

A molding unit includes: a flask guide member guiding the upper flask and the lower flask; a first squeeze member and a second squeeze member disposed in such a manner as to sandwich upper and lower flasks as the upper flask and the lower flask connected with each other, the first squeeze member and the second squeeze guide member each capable of entering the upper and lower flasks; a squeeze cylinder including a rod having an end part fixed to the first squeeze member and a cylinder body extending and contracting the rod; and a squeeze guide member configured to fix relative positions of the second squeeze guide member and the cylinder body. The flask guide member is a hollow rod member, and the squeeze guide member is a rod member disposed in a movable manner inside the flask guide member.