contra

13:21 Jun 21, 2017

This question was closed without grading. Reason: No acceptable answer

Spanish to English translations [PRO]
Tech/Engineering - Mechanics / Mech Engineering / Plastics moulding

Spanish term or phrase: contra

From a technical text from Spain for translation to "neutral" English.

A "contra" as a noun as a portion of a moulded plastic part that projects in a direction that inhibits ejection of the part from the mould.

"...describe un aparato para moldear objetos de plástico en cuya parte interior hay salientes (“contras”) en forma de costilla y de aleta."

BristolTEc KudoZ activity Questions: 1325 (9 open) (153 closed without grading) Answers: 502 Ecuador
Local time: 22:38

Summary of answers provided

protrusion, projection

C. Ortega

Summary of reference entries provided

Helena Chavarria

Answers

1 day 4 hrs confidence:

protrusion, projection

Explanation:
In this context, I believe protrusion or projection would work well. Both words can mean something that "sticks out" from another thing.

C. Ortega
United States
Local time: 23:38
Native speaker of: English

Reference comments

1 hr peer agreement (net): +3

Reference

Reference information:
Undercuts are those features in an injection-molded part that prevent its ejection from the mold. With straight-pull molds such as the ones used by Proto Labs, these are any protrusions, holes, cavities, or recessed areas in the part where alignment is not perpendicular to the mold’s parting line.

https://www.protolabs.com/resources/design-tips/6-ways-to-ac...

Undercut - Any indentation or protrusion in a shape that will prevent its withdrawal from a one-piece mold.

Undercuts on molded parts are features that prevent the part from being directly ejected from an injection molding machine. They are categorized into internal and external undercuts, where external undercuts are on the exterior of the part and interior undercuts are on the inside of the part. Undercuts can still be molded, but require a side action or side pull. This is an extra part of the mold that moves separately from the two halves. These can increase the cost of the molded part due to an added 15 to 30% cost of the mold itself and added complexity of the molding machine.

If the size of the undercut is small enough and the material is flexible enough a side action is not always required. In these cases the undercut is stripped or snapped out of the mold. When this is done usually a stripping plate or ring is used instead of stripper pins so that the part is not damaged. This technique can be used on internal and external undercuts.

https://en.wikipedia.org/wiki/Undercut_(manufacturing)

Helena Chavarria
Spain
Native speaker of:

English
PRO pts in category: 48

Note to reference poster

Asker: Hi Helena Thank you. This looks good and with good reference material. I think it worth placing as an answer, although I will leave it for some time to see if there are other suggestions.

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