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Entering the World of Injection Molds: An Analysis of Technology and Industrial Development from Multiple Perspectives

2025-06-28

Garbage can mold Manufacturer in China (jfmoulds.com)

intotheWorldofInjectionMold:AnalysisofTechnologyandIndustryDevelopmentfromMulti-dimensionalPerspective

intheprecisionsystemofmodernmanufacturing,injectionmoldisthecorecarrierofplasticproductsproduction,anditstechnicalleveldirectlyaffectsproductqualityandproductionefficiency.Thispaperwillcombinecutting-edgetechnologyandpracticalapplicationscenariostocomprehensivelyanalyzethelifecycleofinjectionmoldsfromdesign,manufacturingtooperationandmaintenance.

1.InfrastructureandWorkingPrincipleof1.InjectionMold

injectionmoldisasetofprecisionmetalformingsystem,itsworkflowcanbedisassembledintoplasticizing,injection,pressureholding,cooling,demouldingfivecorelinks.Takingtheproductionofautomobileinstrumentpanelasanexample,thegranularplasticrawmaterialisheatedtoamoltenstateinthebarreloftheinjectionmoldingmachine,andisinjectedintothemoldcavitybythescrewunderhighpressure.Thecoolingsystemusescirculatingcoolanttotakeawayheat,sothattheplasticiscooledandsolidified,andfinallythedemouldingmechanismpushesoutthemoldedproductssmoothly.

Themoldstructurecontainssevenfunctionalmodules:compositiontableofplasticmouldsystem

SystemName	Components	FunctionalDescription
gatingsystem	Mainflowchannel,diverterchannel,gate,coldmaterialcavity	Plasticintothemoldcavitychannel,gatedesignkey,toavoidweldmarks,lackofmaterialandotherdefects
Moldedparts	Core,cavity,insert	Decideplasticproductsshapeandinternalstructure,precisionelectronicproductsshellinjectionmoldrequirementshighprecision temperaturecontrolsystem
Coolingsystem	Cooling system	Controlling the mold temperature affects the molding quality and production efficiency. Conformal cooling technology enhances the cooling efficiency
Exhaust system	Exhaust groove, vacuum-assisted exhaust	Expel the air in the cavity to prevent trapped air and charring, ensuring the molding quality of plastic products
Demolding mechanism	Push rod, push tube, push plate, lateral core-pulling mechanism, rotary demolding device	Push the cooled and solidified plastic products out of the mold to ensure smooth demolding of the products without deformation
Guidance system	Guide pins and guide sleeves	During the opening and closing process of the mold, precise alignment is achieved to prevent the misalignment and damage of mold parts, thereby enhancing the service life and forming accuracy of the mold
Support system	Support plates, spacers, support columns	Bear the weight of the mold and the injection pressure. The design should be based on the size of the clamping force to ensure the

2.moldtypeofdiversifiedapplicationscenarios

ofinjectionmoldvariety,accordingtodifferentstandardscanbeavarietyofclassification,andinvariousindustrieshaveawiderangeofapplications:
1.:Cavitynumber

Moldtypeandproductioncharacteristicstable

Mold type	Production characteristics	Applicable products
Applicable products	One product is produced by injection molding at a time	Small-batch, large-sized or complex-shaped plastic products, such as large automotive bumpers
Multi-cavity mold	Multiple identical products can be produced in one injection molding	Mass production of small plastic products, such as mobile phone keys, electronic component casings, etc

2.Gatingsystem:

Comparisontableofcoldrunnermoldsandhotrunnermolds

Mold type

Flow channel state

Characteristics

Cost

Applicable products

Cold runner mold

Cooling and solidification

Waste materials need to be processed subsequently

Relatively low

Large injection molded parts, multi-type injection molded parts, products with special or valuable materials, and products that need to be mass-produced

Hot runner mold

Constant-temperature melting

Save raw materials and improve product quality and production efficiency

Relatively high

High-end products such as optical lenses and medical plastic products

3.Moldstructure:

TableofPlasticProductMoldTypes

Mold type	Characteristics	Characteristics
Characteristics	Simple structure, low cost and high efficiency	Clothes hangers, trash cans, nuts, gaskets, remote control casings, wooden blocks, etc
Three-plate mold	The gate is flexible, the appearance is optimized, and the degree of automation is high	Mobile phone cases, camera lens caps, transparent spectacle lenses, plastic cups for monitor casings, etc
Lateral core-pulling die	It is suitable for the production of plastic products with lateral structures	Plastic three-way pipe fittings
Rotating mold	It is used for the production of plastic products with a rotary shape	Plastic buckets, toy balls, etc

Indifferentindustries,injectionmoldsalsohaveuniqueapplicationrequirements.Themedicalfieldhasextremelyhighrequirementsforthecleanlinessandprecisionofmolds.MoldsusedfortheproductionofbiodegradablematerialproductsneedtomeetGMPcertificationstandards.Theautomotiveindustryhaspromotedthedevelopmentofcontinuousfiber-reinforcedplasticmoldstoachievelightweighting.Withthedevelopmentof5Gcommunicationtechnology,thedemandforproductsmadeoflowdielectricconstantmaterialshasincreased,promptingmoldstoadoptadvancedstructuressuchasflashfreedesignandultrasonicwelding.