摘要:
Coated moldings coated, on surfaces of moldings, with paint constituted of a thermoplastic resin having affinity for a thermoplastic resin used as a main constituent of the moldings. Method and apparatus for recycling the coated moldings are also described in which the coated moldings are crushed by means of a crusher and the crushed moldings are molded in a mold to provide fresh moldings, followed by coating, by means of a coating device, the fresh moldings on surfaces thereof with a paint constituted of a thermoplastic resin having affinity for the thermoplastic resin for the moldings.
摘要:
Coated moldings coated, on surfaces of moldings, with paint constituted of a thermoplastic resin having affinity for a thermoplastic resin used as a main constituent of the moldings. Method and apparatus for recycling the coated moldings are also described in which the coated moldings are crushed by means of a crusher and the crushed moldings are molded in a mold to provide fresh moldings, followed by coating, by means of a coating device, the fresh moldings on surfaces thereof with a paint constituted of a thermoplastic resin having affinity for the thermoplastic resin for the moldings.
摘要:
The technical field of the invention are the moulding machines, particularly the inner part (core pin) of such moulding machines for manufacturing of thermoplastic preforms, which are later on stretch-blown to containers such as PET-bottles. The invention relates to preforms having a multi-layer structure and incorporating a recycled inner layer, embedded into two layers of virgin material being on the outside and the inside of said preform. The core pin is designed by the invention such that the inner layer of the preform has a minimum thickness at their bottom area and that the minimum thickness is considerably larger than that in a layer known from prior art. The increase of layer-thickness is achieved by designing the core (2) in its front end portion (3a,3b) in an unround fashion. Possible designs of unround front ends are a flat (3b) or a shallow dimple (3a). With such design of the core pin the invention assures that the middle recycled layer does not reach the inner surface of the preform to give the preform - although recycled thermoplasts are used - food-compatibility.
摘要:
Molten plastic is injected into a mold cavity via a hot runner system including at least one shooting pot (69,79). The flow of molten plastic is controlled via a ball check valve (66,82) including the steps of opening the ball check valve (66,82) via injection pressure in the inlet conduit (65,88), and closing the ball check valve (66,82) via injection pressure from the injection piston (71,81) in the shooting pot (69,79).
摘要:
Un moule pour coulage par injection à cavités multiples (1) permettant de couler simultanément par injection une multiplicité d'articles à couches multiples, possède un système d'admission à canal chaud unique (19) destiné à conduire successivement une première et une seconde matière moulable en fusion dans les cavités (3) du moule de manière que chacune des matières soit amenée simultanément dans toutes les cavités et en quantités égales. L'invention concerne aussi une barre centrale (5) pour chaque cavité, dans laquelle une concavité est ménagée à un endroit contigu au point d'admission des matières dans la cavité, afin d'empêcher que la première matière injectée dans le cycle d'injection ne soit enlevée du bout de la barre centrale par la seconde matière d'injection. Un tampon est formé à partir de la première matière injectée dans la région du col de l'ébauche pour compenser les variations de température dans les cavités et dans la matière répartie entre les différentes parties du moule, et la première partie de la quantité dosée de la matière injectée en premier au cours du prochain cycle d'injection est utilisée pour fermer hermétiquement l'ébauche à la fin du cycle d'injection.
摘要:
A coated molded article obtained by coating the surfaces of a molded article with a coating material of a thermoplastic resin having affinity with a thermoplastic resin which is a main component of the molded article. A method of recycling the coated molded article by pulverizing the coated molded article in a pulverizer, molding the pulverized article in a mold, and coating the surfaces of the thus molded article with a coating material of a thermoplastic resin exhibiting affinity with the thermoplastic resin that constitutes the molded article by means of a coating apparatus. An apparatus for recycling the article.
摘要:
Coated moldings coated, on surfaces of moldings, with paint constituted of a thermoplastic resin having affinity for a thermoplastic resin used as a main constituent of the moldings. Method and apparatus for recycling the coated moldings are also described in which the coated moldings are crushed by means of a crusher and the crushed moldings are molded in a mold to provide fresh moldings, followed by coating, by means of a coating device, the fresh moldings on surfaces thereof with a paint constituted of a thermoplastic resin having affinity for the thermoplastic resin for the moldings.
摘要:
The technical field of the invention are the moulding machines, particularly the inner part (core pin) of such moulding machines for manufacturing of thermoplastic preforms, which are later on stretch-blown to containers such as PET-bottles. The invention relates to preforms having a multi-layer structure and incorporating a recycled inner layer, embedded into two layers of virgin material being on the outside and the inside of said preform. The core pin is designed by the invention such that the inner layer of the preform has a minimum thickness at their bottom area and that the minimum thickness is considerably larger than that in a layer known from prior art. The increase of layer-thickness is achieved by designing the core (2) in its front end portion (3a,3b) in an unround fashion. Possible designs of unround front ends are a flat (3b) or a shallow dimple (3a). With such design of the core pin the invention assures that the middle recycled layer does not reach the inner surface of the preform to give the preform - although recycled thermoplasts are used - food-compatibility.