To those experiencing mold misalignment (poor alignment) during injection molding

～Improve the cause of mold misalignment through mold maintenance services and achieve stable molding quality～

If defects such as burrs, steps, or positional misalignment repeatedly occur during injection molding, the cause may be mold misalignment (alignment failure). Mold misalignment not only affects product dimensional accuracy and appearance quality but also increases the load on the mold, shortening its lifespan. To achieve stable mass production, cause analysis and appropriate maintenance through mold maintenance services are crucial.

■ What is Mold Misalignment (Alignment Failure)? Causes and Countermeasures

Mold misalignment (alignment failure) refers to a state where the fixed and movable mold halves do not engage correctly, causing a positional deviation in the relationship between the cavity and core. As a result, steps or burrs may occur at the parting line, or dimensional accuracy may decrease. In molds used for a long period, wear of guide components can reduce positioning accuracy, leading to mold misalignment.

■ Main Causes

Mold misalignment (alignment failure) primarily occurs due to the following factors: Poor mold mounting accuracy: Errors in the mold mounting position reduce positioning accuracy during mold clamping. Wear/damage of guide pins/guide bushings: Wear or damage to guide components prevents accurate alignment between the fixed and movable halves. Since mold misalignment can occur not only from a single factor but also from a combination of multiple factors, it is important to check the overall condition of the mold.

■ Main Countermeasures

To improve mold misalignment (alignment failure), it is important to inspect and adjust both the mold and the molding equipment. Mold readjustment: Check the mounting condition and mating surfaces, and adjust to the correct positional relationship. Replacement of guide components: Replace worn guide pins and guide bushings to restore positioning accuracy. Verification of machine installation and clamping accuracy: Inspect the installation status and clamping accuracy of the molding machine to create an environment where the mold can fully demonstrate its performance. By appropriately identifying the causes and implementing corresponding countermeasures, it leads to the prevention of defect recurrence and the maintenance of stable quality.

■ Key Points for the Client to Consider

When requesting mold misalignment improvement, sharing the following information will enable more accurate cause analysis: Location of burrs, steps, etc. Mold shot count and maintenance history Guide pin/guide bushing replacement history Specifications and clamping conditions of the molding machine in use Timing and frequency of defect occurrence Providing samples of defective and good products along with measurement data will facilitate smoother consideration of improvement measures.

■ Features of SHINKO PRECISION VIETNAM's Mold Maintenance Services

SHINKO PRECISION VIETNAM specializes in precision injection molds under 100t and comprehensively inspects mounting accuracy and the condition of guide components, which are causes of mold misalignment (alignment failure). We not only repair and replace worn parts but also propose maintenance aimed at extending mold lifespan, supporting quality stabilization. Furthermore, if there is room for improvement in the mold structure or positioning mechanism, we also offer design improvements aimed at preventing recurrence through mold design consulting.

Addressing mold misalignment (alignment failure) early not only stabilizes quality but also extends the mold's lifespan. If defects such as burrs, steps, or positional misalignment are repeatedly occurring, we will check the mold's condition and molding parameters and propose optimal improvement measures.