Hollow Plastic Object Transverse Reinforcement Production
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Solution Overview
Problem
Current methods for producing hollow plastic objects with transverse reinforcements, such as high-tensile braided or warp-knitted glass or carbon fibers, are limited by the need to form reinforcements around a stationary core, restricting the production of long, continuous objects and complicating the process.
Innovation Solution
A method and device where the mold and core are collectively moved in a periodic manner to guide the transverse reinforcement over the core, allowing for the use of prefabricated reinforcement tubes and eliminating the need for a disruptive core holder in front of the mold, enabling continuous production of hollow plastic objects with transverse reinforcements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the core is held stationary in front of the mold, then the core position is stable and easy to control, but the transverse reinforcement cannot be pulled as a prefabricated closed tube over the core and production of long hollow plastic objects is limited
Solution Approach 1:
The core is transformed from a stationary component to a dynamically movable one. The core is now moved collectively with the mold through the plastic object in a periodic manner, enabling the system to adapt to different production stages and allowing prefabricated reinforcement tubes to be pulled over the core during the backward movement phase.
Solution Approach 2:
The mold and core execute periodic back-and-forth movements through the plastic object. During forward movement, the plastic object is produced; during backward movement, the prefabricated transverse reinforcement tube is pulled over the core. This periodic action enables both continuous production and reinforcement integration.
2Ease of manufacture
If the transverse reinforcement is formed around the core between the mold and the core holder, then the reinforcement can be created in situ, but the production is limited to limited lengths and the formation process is more complex
Solution Approach 1:
The transverse reinforcement is pre-fabricated as a closed tube before being integrated into the production process. This prefabricated reinforcement tube is then pulled over the moving core during the backward movement phase, eliminating the need for complex in-situ formation and enabling continuous production of longer objects.
3Ease of operation
If a disruptive core holder is used in front of the mold to hold the core, then the core can be positioned, but it prevents the use of prefabricated reinforcement tubes and increases device complexity
Solution Approach 1:
Instead of holding the core stationary in front of the mold with a core holder, the solution inverts the approach by moving the core collectively with the mold through the plastic object. This eliminates the need for a disruptive core holder mechanism in front of the mold and allows prefabricated reinforcement tubes to be used.
Data Source
AI summary
A core (14) which is typically held in front of the mold (13) is required for producing hollow plastic objects (10). This does not allow for a transverse reinforcement (11) which is formed from a prefabricated reinforcement tube to be pulled over the core (14). A method and device is provided for the core (14) to be held behind the mold (14) when viewed in the production direction (17). In this case, the front end (15) of the core (14), which is located in front of the mold (13), remains free, such that a transverse reinforcement (11) that has been formed from a prefabricated reinforcement tube can be pulled over the free front end (15) of the core (14).