Flexible Demolding Device for Core Molding

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Solution Overview

Problem

Existing core molding devices for disposable sanitary products are rigid, making them inconvenient to manufacture and use, and often result in residual absorbent material during demolding.

Innovation Solution

A flexible demolding device with a flexible substrate and driving device, including forming holes and a conveying belt, is used to form cores, combined with a molding assembly and suction assembly to fill absorbent material into forming holes, eliminating the need for a rigid structure and reducing residual material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a rigid mold structure is used for core formation, then the structural strength and stability are improved, but the ease of manufacture and ease of operation deteriorate due to complexity in manufacturing, mounting, and core detachment

Engineering Contradiction:

Improvestructural strengthVSAvoidease of operation

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent applies a flexible substrate with forming holes instead of a rigid mold structure. The flexible substrate can be easily manufactured, mounted, and detached from the core, while still maintaining the necessary structural integrity for core formation. This resolves the contradiction by providing sufficient strength through the flexible substrate's design while dramatically improving ease of operation.

Inventive Principle:

Principle #30Flexible shells and thin films

2Stability of the object's composition

If a rigid mold structure is used for core formation, then the structural stability is improved, but the manufacturing complexity and mounting difficulty increase significantly

Engineering Contradiction:

Improvestructural stabilityVSAvoidease of manufacture

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The flexible substrate serves as a replaceable component that can be easily manufactured and mounted on the conveying belt. The forming holes in the flexible substrate provide structural stability for core formation, while the flexible nature allows for simplified manufacturing and mounting processes compared to rigid molds.

Inventive Principle:

Principle #30Flexible shells and thin films

3Strength

If a rigid mold is used for core formation, then the structural integrity during forming is improved, but residual absorbent material remains on the mold surface during detachment

Engineering Contradiction:

Improvestructural integrityVSAvoidresidual absorbent material

Core Design Contradiction:

StrengthVSLoss of substance

Solution Approach 1:

The flexible substrate's flexible surface allows it to conform and release the formed core more effectively than rigid molds. This flexibility enables complete detachment of the core with minimal residual absorbent material remaining on the substrate, resolving the contradiction between maintaining structural integrity during forming and preventing material residue during detachment.

Inventive Principle:

Principle #30Flexible shells and thin films

4Ease of operation

If a flexible substrate is used instead of rigid mold, then the ease of manufacture and ease of operation are improved, but the manufacturing precision of forming holes may deteriorate

Engineering Contradiction:

Improveease of operationVSAvoidmanufacturing precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The flexible substrate is designed with forming holes that can be manufactured with sufficient precision for core formation. The flexibility of the substrate does not compromise the precision of the forming holes, as the holes maintain their defined geometry while the substrate itself remains flexible for ease of operation and detachment.

Inventive Principle:

Principle #30Flexible shells and thin films

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 flexible demolding device simplifies manufacturing, maintains size precision, and avoids residual absorbent material, providing a more efficient and easy-to-use core molding process.

Implementation Method 1

a suction assembly (12) having a suction area (1211)

Methodology Applied

Scientific EffectNegative pressure: Pressure Drop

Data Source

PatentEP4316435B1Flexible demolding device, core molding device, and core forming method

Publication Date: 2026.03.11 SHANGHAI ZHILIAN PRECISION MACHINERY

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AI summary

A flexible demolding device (11), comprising a flexible substrate (111) and a driving device (112). A plurality of forming holes (1110) are provided on the flexible substrate (111) and penetrate through the thickness direction of the flexible substrate (111). The driving device (112) drives the flexible substrate (111) to move continuously in a defined direction. The driving device (112) comprises a driving wheel (1121), a supporting wheel (1122) and a conveying belt (1123) which is sleeved between the driving wheel (1121) and the supporting wheel (1122). The flexible substrate (111) is fixed on the conveying belt (1123). One one hand, the demolding assembly no longer has a rigid structure. On the other hand, since the flexible substrate (111) can be fixed on the conveying belt (1123) by means of the connecting body (1130), the flexible substrate (111) can be easily replaced. Meanwhile, when the connecting body (1130) is provided with a protrusion, and the driving wheel (1121) is provided with a corresponding clamping groove (11211), the size precision of the forming holes (1110) on the flexible substrate (111) can be easily maintained. A core molding device applying the flexible demolding device (11) is further provided.