Delamination Container Liquid Blow-Molding Separation
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Solution Overview
Problem
The existing liquid blow-molding method for delamination containers faces difficulties in separating the inner layer body from the outer layer body when dispensing content liquids, particularly when pressurized liquid is used, making it challenging to perform the initial separation processing.
Innovation Solution
A liquid blow-molding method that involves molding a delamination container with an outer and inner layer, including an ambient air introduction hole, where pressurized liquid is supplied to mold the container and then sucked out to separate the inner layer body, followed by re-laminating it using a plunger pump in a controlled manner to ensure separation and re-attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pressurized liquid is supplied into the preform for blow-molding, then the filling step can be omitted and production process simplified, but the inner layer body cannot be separated from the outer layer body
Solution Approach 1:
The patent applies preliminary action by performing the separation processing of the inner layer body from the outer layer body before the final filling step. The separation is achieved by generating negative pressure inside the inner layer body through sucking out liquid after blow-molding, then returning the inner layer body to its laminated state. This preliminary separation ensures the delamination container functions correctly when dispensing, while still allowing the use of pressurized liquid for blow-molding to simplify the overall production process.
2Reliability
If initial separation processing is performed by sucking out air after blow-molding, then inner layer body separates from outer layer body, but this method cannot be applied when pressurized liquid is used for blow-molding
Solution Approach 1:
The patent transitions from pneumatic separation (sucking out air) to hydraulic separation (sucking out liquid). By using the pressurized liquid already present in the delamination container after liquid blow-molding, the system generates negative pressure to separate the inner layer body from the outer layer body. This hydraulic approach maintains separation functionality while being compatible with liquid blow-molding processes.
3Productivity
If the delamination container is filled with content liquid after blow-molding, then the filling step is integrated, but initial separation processing becomes difficult to perform
Solution Approach 1:
The patent performs separation processing as a preliminary action immediately after blow-molding while the container still contains the pressurized liquid used for molding. The sequence is: blow-molding with pressurized liquid, then separating the inner layer body by sucking out the liquid, and finally returning the inner layer body to its laminated state. This approach integrates the filling function into the blow-molding step while maintaining separation capability, thereby improving productivity without sacrificing ease of manufacture.
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
This method effectively allows for the separation of the inner layer body from the outer layer body during dispensing, ensuring the delamination container functions correctly and maintaining the quality of the content liquid by minimizing air contact.
Implementation Method 1
supplying pressurized liquid into the container material
Implementation Method 2
separating the inner layer body from the outer layer body by sucking the liquid, which has been filled in the delamination container, out of the delamination container
Data Source
AI summary
A liquid blow-molding method for molding a delamination container from a resin container material. The resin container material includes an outer layer, an inner layer, and an ambient air introduction hole. The delamination container includes an outer layer body and an inner layer body, which is laminated on the inner side of the outer layer body in a manner such that the inner layer body is separatable from the outer layer body. The liquid blow-molding method includes the container molding step of molding the container material into the delamination container by supplying a pressurized liquid into the container material; and the inner layer body separation step of separating the inner layer body from the outer layer body by sucking the liquid out of the delamination container.