Computer-aided tool cost estimating: an evaluation of the labour content of injection moulds

Löwe, Paul; Walshe, K. B. A.

doi:10.1080/00207548508904714

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Sundaram and Maslekar [8] used regression model approach in injection mold cost estimation. Lowe and Walshe [9] used labor involvement in injection mold making as a reference; mold cost was estimated using linear regression analysis.…”

Section: Previous Workmentioning

confidence: 99%

An integrated framework for die and mold cost estimation using design features and tooling parameters

Keinvorname

Nagahanumaiah

Mukherjee

et al. 2005

Int J Adv Manuf Technol

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Tooling is an essential element of near net shape manufacturing processes such as injection molding and die casting, where it may account for over 25% of the total product cost and development time, especially when order quantity is small. Development of rapid and low cost tooling, combined with a scientific approach to mold cost estimation and control, has therefore become essential. This paper presents an integrated methodology for die and mold cost estimation, based on the concept of cost drivers and cost modifiers. Cost drivers include the geometric features of cavity and core, handled by analytical cost estimation approach to estimate the basic mold cost. Cost modifiers include tooling parameters such as parting line, presence of side core(s), surface texture, ejector mechanism and die material, contributing to the total mold cost. The methodology has been implemented and tested using 13 industrial examples. The average deviation was 0.40%. The model is flexible and can be easily implemented for estimating the cost of a variety of molds and dies by customizing the cost modifiers using quality function deployment approach, which is also described in this paper.

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Section: Previous Workmentioning

confidence: 99%

An integrated framework for die and mold cost estimation using design features and tooling parameters

Keinvorname

Nagahanumaiah

Mukherjee

et al. 2005

Int J Adv Manuf Technol

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“…Like conventional tool-cost-estimat- [4][5][6] ing methods, they are meant to be applied after the tooling system has been detailed. Therefore, they are inadequate as a measure of comparison to the costs of alternative parts and mold designs that can be proposed for a new product at the early stages of product design.…”

Section: Design Of a Cost-based System For Molded Partsmentioning

confidence: 99%

Design for manufacture of a cost-based system for molded parts

Shing

1999

Adv. Polym. Technol.

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“…Table 1 summarizes the cost-estimation methods proposed in the past for injection-moulded, permanent-mould casting and die-cast parts. Lowe and Walshe (1985) developed a system for calculating the total manufacturing hours required for the preparation of an injection mould. However, their system was mainly concerned with the labour content of tool manufacture.…”

mentioning

confidence: 99%

“…They considered part complexity by calculating the total number of surfaces for calculating the mould manufacturing cost, but part design feature complexity and tolerance considerations were not addressed in their work. In addition, the system was based on a labour cost model given by Lowe and Walshe (1985) to find the die manufacturing cost. Bidanda et al (1998) developed an integrated castability and cost-estimation system for parts to be produced by permanent mould casting.…”

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confidence: 99%

System for early cost estimation of die-cast parts

Madan

Rao

Kundra

2007

International Journal of Production Research

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Early cost estimate of a part is important information and forms a basis for preparing quotations, which are competitive from a market point of view. It is seen that a commonly adopted approach of variant cost estimation based only on geometric information of the component is not always accurate. This is also true in the case of die-cast parts. The geometric complexity of the part, tooling complexity, part and tool material, processing cost, and manufacturing resources for producing the part all need to be considered for accurate cost estimation. This paper deals with a comprehensive system developed to estimate and analyze the manufacturing cost of die-cast parts. A computer-aided cost-estimation system has been developed that applies manufacturing process as well as manufacturing resource considerations in addition to part feature complexity. Use of the proposed system is demonstrated in selecting the optimum number of cavities and the appropriate manufacturing resources under machine-related constraints. Further, the cost-estimation system developed herein is used for carrying out feature sensitivity analysis to identify design features that add significant cost to the part. The use of this system for optimal machine loading in multiple parts situation is also demonstrated.

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Computer-aided tool cost estimating: an evaluation of the labour content of injection moulds

Cited by 7 publications

References 2 publications

An integrated framework for die and mold cost estimation using design features and tooling parameters

An integrated framework for die and mold cost estimation using design features and tooling parameters

Design for manufacture of a cost-based system for molded parts

System for early cost estimation of die-cast parts

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