To optimize the demolding mechanism design of baby bottle molds, the following aspects can be considered: 

Rational selection of demolding methods
Push rod demolding: For simple-shaped and internally uncomplicated baby bottles, push rod demolding can be adopted. Optimize the position and quantity of push rods to ensure they are evenly distributed along the demolding direction of the baby bottle, avoiding deformation caused by uneven demolding force. For instance, for cylindrical baby bottles, push rods can be evenly set around the bottom and body of the bottle.
Push plate demolding: For thin-walled or complex-shaped baby bottles, push plate demolding can provide uniform demolding force and reduce the risk of deformation. During design, ensure that the contact area between the push plate and the baby bottle is large enough and that the push plate moves smoothly without any jamming.
Pneumatic demolding: In some high-precision and easily deformable baby bottle molds, pneumatic demolding devices can be introduced. By setting air holes in the mold and using compressed air to blow the baby bottle out of the mold during demolding, deformation and damage caused by mechanical demolding can be effectively avoided.
Optimization of demolding mechanism parts design
Push rod design: Select appropriate push rod materials, such as high-strength mold steel, to ensure the rigidity and wear resistance of the push rods. At the same time, optimize the design of the push rod heads, such as using arc or spherical designs, to increase the contact area with the baby bottle and reduce local pressure during demolding.
Push plate design: The thickness of the push plate should be reasonably calculated based on the mold size and demolding force to ensure that the push plate does not deform during demolding. Uniformly distributed ejection holes should be set on the push plate to ensure uniform ejection force. Additionally, the fit clearance between the push plate and the mold should be appropriate, ensuring smooth movement of the push plate while preventing plastic melt from entering the gap and causing flash.
Demolding spring design: Reasonably select the stiffness and preload of the demolding springs to ensure that the demolding mechanism can act quickly when the mold opens and can smoothly reset when the mold closes. The number and arrangement of springs should be optimized based on the mold structure and demolding force to ensure uniform distribution of the demolding force.
Consider the structural characteristics of the baby bottle
Bottle body shape: For baby bottles with protrusions, grooves, or patterns, the demolding mechanism design should take these structures into account. Side core-pulling mechanisms such as sliders and inclined cores can be used to solve the side parting problem and ensure smooth demolding of the baby bottle.
Bottle mouth threads: If the baby bottle has threads on the mouth, a thread demolding mechanism can be adopted. Common types include rotary thread demolding mechanisms and forced thread demolding mechanisms. The rotary thread demolding mechanism uses gear and rack transmission devices to rotate the thread core, achieving thread demolding, suitable for high-precision threaded baby bottles; the forced thread demolding mechanism uses elastic elements or special demolding structures to force the plastic part to separate from the thread core to a certain extent, suitable for baby bottles with lower requirements for thread precision.
Simulation analysis and optimization
Use mold analysis software: Through professional mold analysis software such as Moldflow, simulate and analyze the demolding process of the baby bottle. The software can predict the stress distribution, deformation, and demolding force during demolding, helping designers identify potential problems and optimize the demolding mechanism accordingly.
Multiple trials and improvements: After the mold is manufactured, conduct multiple trial mold tests. Based on the test results, adjust and improve the demolding mechanism. For example, observe the surface quality and deformation of the baby bottle after demolding, measure the demolding force, and optimize the push rod position, push plate structure, etc., based on the actual situation until the ideal demolding effect is achieved.