Textile Weaving Research Articles

Manufacturing of Doubly Curved Tubular Composite Structures: Mapping and Weave Modifications

The versatility of the textile weaving process has made it a popular method for producing structural composite preforms. Enhanced through-thickness strength by multi-layer weaving, good in-plane strength and the ability to produce 2.5D or 3D shapes, are some of the advantages which have made weaving the most commonly used textile process for composite applications. It is also possible to incorporate local modifications to the weave patterns and fibre-densities within the woven structure; although this characteristic of weaving has not been completely exploited by the composites industry. It is easy to produce a tubular structure having good bi-directional mechanical properties. Moreover, the preform also can be molded into bent shapes, making the woven composites more versatile than ever before. Drape behavior of such tubular fabrics is complex and has not previously been investigated. The aim of this paper is to discuss the manufacturing aspects of such tubular preforms and to suggest ways to overcome the wrinkling problems using the mapping results. In terms of the mapping models, existing shear-based algorithms for mapping a flat fabric over open surfaces are first applied to a closed tubular section. Specific algorithms are developed to map a straight tubular preform over a bent tubular section. Wrinkles are prevalent in sections with severe bends and the paper also discusses methods to remove them.

Jesuit Scientia and Natural Studies in Late Imperial China, 1600-18001

AbstractArguably, by 1600 Europe was ahead of China in producing basic machines such as clocks, screws, levers, and pulleys that would be applied increasingly to the mechanization of agricultural and industrial production. In the seventeenth and eighteenth centuries, however, Europeans still sought the technological secrets for silk production, textile weaving, porcelain making, and large scale tea production from the Chinese. Chinese literati in turn, before 1800, borrowed new algebraic notations (of Hindu-Arabic origins), Tychonic cosmology, Euclidean geometry, spherical trigonometry, and arithmetic and trigonometric logarithms from Europe. Until 1990, Chinese elites and their Manchu rulers interpreted the transition in early modern Europe—from new forms of scientific knowledge to new modes of industrial power—on their own terms. Each side made a virtue out of the mutually contested accommodation project, and each converted the other's forms of natural studies into acceptable local conventions of knowledge. The Ming and Qing imperial court induced Jesuit calendrical, military, and land mensuration experts to work as imperial minions in the government bureaucracy to augment each dynasty's own project of political and cultural control. Consequently, it would be a historiographical mistake to underestimate Chinese efforts to master on their own terms the Western learning of the Jesuits in the sixteenth, seventeenth, and eighteenth centuries.

Mechanical properties of composite panels based on woven sandwich-fabric preforms

An overview of the mechanical properties of the core of woven sandwich-fabric panels is given. These materials provide a new type of sandwich structure with a high skin–core debonding resistance and the potential for cost-effective sandwich construction. The sandwich-fabric preforms are produced by a large-scale textile weaving process (velvet weaving). The basic mechanical properties of the sandwich core (compression and shear) were evaluated and compared with those of other core materials. There is a large variety in possible core layouts and thus mechanical performance for sandwich-fabric panels. Acceptable mechanical properties for cores of higher thickness (higher than 10 mm) can be obtained by weaving part of the pile fibres in the core under angles of ±45°, by creating networks of piles at lower degrees of stretching and sufficient pile density, or by filling the core with foam. There appears to be a strong synergistic effect between pile and foam properties in the sandwich core.

両大戦間期泉北機業における織物工場経営の動向

The aim of this paper is to examine the trend of Senboku (the southern district of Osaka prefecture) textile weaving industry in the interwar period by analyzing the trend of the management of a textile weaving factory in the district. For the examination, we have investigated the trend of the management of Nayatake textile weaving factory in the interwar period. Through this investigation, we can divide the management period of Nayatake textile weaving factory in the interwar period into three parts as follows.1 The management period in which Nayatake mainly produced cotton textile goods (1922-25) The management of Nayatake in this period depended heavily upon Senboku county. In short Nayatake carried on most of transactions with cotton yarns wholesale stores, textile wholesale stores, and banks in Senboku county. 2 The management period in which products of Nayatake were diversified (1926-30) Nayatake adopted a product diversification strategy in which Nayatake produced cotton blankets and cotton shawls in addition to cotton sheets in order to get out of depression. So the management of Nayatake in this period was very different from the first period. The term-end profit of Nayatake was improved by adopting this strategy. And also as far as yarns and textile wholesale stores and banks were concerned, Nayatake carried on transactions on a much larger scale than the first period by adopting it. To put it concretely, as far as wholesale stores were concerned, Nayatake depended much more upon Osaka city than the first period. 3 The management period in which Nayatake mainly produced woolen textile goods (1931-38) As the management of Nayatake continued to suffer a decrease in profit for seven semiannual settlement terms, Nayatake needed further diversification of its products. So Nayatake started to produce woolen goods by introducing high-performance wool-looms. Introducing them made Nayatake capital intensive, and a term-end profit was improved quickly. In this period Nayatake tended to sell woolen goods to wholesale stores in Osaka city by check and cotton goods to local wholesale stores on credit. Also Nayatake tended to buy woolen yarns directly from woolen spinning companies and cotton yarns from wholesale stores in both Osaka and Senboku county. As far as attached finished processing was concerned, napping processing depended upon Senboku, and another processing upon Osaka city and an advanced woolen weaving area, Bishu. Moreover Nayatake tended to carry on transactions with banks in Osaka city in addition to local banks in Senboku county. Through the analysis mentioned above, the conclusion of this paper should be noted as follows. Senboku county became the most famous woolen textile weaving area in Japan after World War II. However the conversion from cotton textiles to woolen textiles had already occurred during the period from the 1930s to 1930s. Therefore the interwar period was the very turning point for Senboku which would succeed as the most well-known woolen textile weaving area after the War.

Sound absorbent slats for window blinds

A slat for use in the assembly of a Venetian blind is provided with a light and sound absorptive coating on at least one of its major surfaces produced by flocking, applique, or textile weaving techniques, a preferred embodiment of the invention providing a strip having enhanced resistance to slippage of a coating appliqued to the strip and of a textile encapsulation of the strip in directions laterally and longitudinally of the strip.

Noise in Textile Weaving Mills

Noise in Textile Weaving Mills

A micro, econometric investigation of choice of technology

This paper reports on a micro study of the determinants of technological choice utilizing a sample of observations at the man-machine level from operating plants. The large sample size permits econometric modelling - based on engineering and process analytic principles - of the production relationships involved. It also allows statistical testing of hypotheses. Among the determinants analyzed in the context of differentiated inputs and outputs are policies affecting prices on the factor and product markets. The particular case examined is the choice between imported and locally made looms for cotton textile weaving in Korea. However, methodological concerns are given equal weight in the discussion.

Noise reduction in a textile weaving mill.

Abstract A noise reduction program in a textile weaving mill resulted in attenuations of from 7 dB amidst the looms to 12 dB in the periphery areas in the higher frequencies of most concern, while at the lower frequencies the attenuations were about one-half of these values. The four-phase program consisted of (1) use of ceiling absorbent material, (2) use of wall absorbent material, (3) floor treatment, and (4) modification of the looms.

Noise Reduction in a Textile Weaving Mill

Noise Reduction in a Textile Weaving Mill

Textile Weaving for Blind Men

Textile Weaving for Blind Men