Foldable Container Side Discharge Gate for Low-Cost Bulk Unloading

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Solution Overview

Problem

Existing foldable pallet boxes face challenges with high costs for side discharge ports and safety concerns related to turning tables, which are expensive and prone to safety hazards, and existing solutions like funnel-type and side discharge ports have drawbacks such as additional handling and high injection mold costs.

Innovation Solution

A foldable container with a side discharge port formed by notches on the base and side plates, equipped with a gate plate that slides to open and close the port, using existing vacuum forming parts and minimal additional components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a turning table is used for discharge, then the container can be rotated and dumped, but the cost increases and safety hazards arise

Engineering Contradiction:
Improvedischarge operationVSAvoidsafety
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The discharge mechanism is segmented into a gate plate that can be independently opened or closed, separating the discharge function from the entire container structure. This allows controlled discharge without rotating the whole container, eliminating safety hazards associated with turning tables while maintaining operational ease.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The gate plate is extracted as a separate component from the container body, mounted on the side plate. This extracted gate plate can be opened or closed independently to control discharge, eliminating the need for a turning table and its associated safety risks while preserving the discharge function.

Inventive Principle:
Principle #2Taking out (Extraction)

2Ease of operation

If a funnel plate is provided inside the box, then discharge can be controlled, but the funnel plate needs additional stacking and packaging for transportation

Engineering Contradiction:
Improvedischarge controlVSAvoidadditional components
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The gate plate is merged with the side plate structure through slidable mounting, combining the discharge control function with the existing container wall. This integration eliminates the need for separate funnel plates and their associated stacking and packaging requirements, reducing device complexity while maintaining discharge control capability.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The side plate serves multiple functions: it provides structural support for the container and simultaneously serves as the mounting structure for the gate plate. This multi-functionality eliminates the need for separate funnel plates, reducing the number of components and their associated handling requirements.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Ease of operation

If a side discharge port is provided, then discharge can be controlled, but injection mold costs for medium and large-sized containers are high

Engineering Contradiction:
Improvedischarge controlVSAvoidmold cost
Core Design Contradiction:
Ease of operationVSEase of manufacture

Solution Approach 1:

The gate plate is designed to be slidable rather than fixed, allowing dynamic opening and closing of the discharge port. This dynamic mechanism is achieved through simple sliding grooves and positioning protrusions that can be added to existing molds, avoiding the need for expensive new mold designs while providing controlled discharge functionality.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

Instead of investing in expensive permanent mold modifications for medium and large-sized containers, the solution uses a simple, inexpensive gate plate that can be manufactured separately and attached to existing containers. This disposable-like approach avoids high mold costs while providing the same discharge control function.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Data Source

PatentEP4678550A1Foldable container and manufacturing method therefor
Publication Date: 2026.01.14 SHANGHAI HONGYAN RETURNABLE TRANSIT PACKAGINGS CO LTD
  • EP4678550A1 patent drawingFigure 1
  • EP4678550A1 patent drawingFigure 2~3
  • EP4678550A1 patent drawingFigure 4~5

AI summary

A foldable container and a manufacturing method therefor. The foldable container comprises a base (1) and a plurality of side plates (2). The plurality of side plates (2) are foldably mounted on the base (1), and the side plates (2) and the base (1) form an accommodating cavity. The foldable container further comprises at least one side discharge port (3) and a gate plate (4). The base (1) is provided with a first notch (13), the side plate (2) facing to the first notch (13) is provided with a second notch (23), and the first notch (13) and the second notch (23) jointly form the side discharge port (3). The gate plate (4) is slidably mounted on said side plate (2), and the movement of the gate plate (4) on the side plate (2) allows the gate plate (4) to have a first state in which the side discharge port (3) is closed, and a second state in which the side discharge port (3) is open. The side discharge port of the foldable container is obtained by directly processing a base and side plates of an existing container, which has the advantage of low costs.