Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
  • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
  • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
  • B65D1/023—Neck construction
  • B65D1/0246—Closure retaining means, e.g. beads, screw-threads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
  • B29C49/04—Extrusion blow-moulding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/42—Component parts, details or accessories; Auxiliary operations
  • B29C49/76—Neck calibration
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
  • B29D22/00—Producing hollow articles
  • B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
  • B65D1/40—Details of walls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/42—Component parts, details or accessories; Auxiliary operations
  • B29C49/48—Moulds
  • B29C49/54—Moulds for undercut articles
  • B29C2049/542—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles
  • B29C2049/543—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles at the neck portion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/42—Component parts, details or accessories; Auxiliary operations
  • B29C49/48—Moulds
  • B29C49/54—Moulds for undercut articles
  • B29C2049/542—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles
  • B29C2049/545—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles by rotationally actuating an auxiliary mould part while the mould is still in a closed position
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/42—Component parts, details or accessories; Auxiliary operations
  • B29C49/48—Moulds
  • B29C49/54—Moulds for undercut articles
  • B29C2049/542—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles
  • B29C2049/546—Moulds for undercut articles having means to facilitate the removal of the blow moulded articles by translatorilly actuating an auxiliary mould part while the mould is still in a closed position
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2793/00—Shaping techniques involving a cutting or machining operation
  • B29C2793/0054—Shaping techniques involving a cutting or machining operation partially cutting through the material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2949/00—Indexing scheme relating to blow-moulding
  • B29C2949/30—Preforms or parisons made of several components
  • B29C2949/3041—Preforms or parisons made of several components having components being extruded
  • B29C2949/3042—Preforms or parisons made of several components having components being extruded having two or more components being extruded
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
  • B29C49/04—Extrusion blow-moulding
  • B29C49/04102—Extrusion blow-moulding extruding the material continuously
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
  • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
  • B29C49/04—Extrusion blow-moulding
  • B29C49/04104—Extrusion blow-moulding extruding the material discontinuously
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
  • B29K2995/0037—Other properties
  • B29K2995/0081—Tear strength
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/712—Containers; Packaging elements or accessories, Packages
  • B29L2031/7158—Bottles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
  • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents

Definitions

• the invention relates to an extrusion-blown plastic container according to the preamble of claim 1.
• the invention also relates to a method for producing such a plastic container.
• the usual in the past containers made of white or stained, glass or ceramic are increasingly being replaced by plastic containers.
• plastic containers are used for the packaging of fluid substances, such as beverages, household products, care products, cosmetics, etc.
• the low weight and the lower costs certainly play a significant role in this substitution.
• the use of recyclable plastic materials and the overall more favorable overall energy balance in their production also contribute to the consumer's acceptance of plastic containers, in particular of plastic bottles.
• plastic containers in particular plastic bottles, for example made of polyethylene or polypropylene
• a plastic hose is extruded continuously or discontinuously with an extrusion head, introduced into the mold cavity of a blow molding tool, inflated by overpressure, cooled and demoulded.
• the inflation of a plastic hose section introduced into the blow mold cavity is usually carried out with a calibration blow mandrel, which is inserted through an opening in the blow mold cavity into the plastic hose section to be inflated.
• the Kalibrierblasdorn one hand has the task of introducing air into the plastic tube so that it is formed according to the Blasformkavmaschine. On the other hand, the Kalibrierblasdorn also serves for defined réelleausformung (calibration) of the neck of the
• Hose section inflated plastic container on which the pouring opening is provided.
• the Kalibrierblasdorn is retracted through the opening of the closed Blasformwerkmaschineschws in the tube section.
• excess art Substance material axially displaced and so set the inner diameter of the usually having a cylindrical inner wall having neck with the Ausgiessöffhung.
• Known, produced by extrusion blow molding plastic containers have a closure which is fixed in a form-fitting manner on fastening means which are formed on the outer wall of the container neck.
• the fastening means may be formed, for example, as an external thread, as external thread sections, as guides of a bayonet closure, or as a snap ring.
• the fastening means may be formed projecting relative to the outer wall of the container neck or as corresponding grooves and depressions in the outer wall of the container.
• the attachment means may also be formed as a combination of protrusions and recesses.
• the closure is provided with correspondingly formed elements in order to enable a positive cooperation.
• the known closures overlap and overhang the neck of the plastic container.
• the plastic container provided with the closure has a greater height than the plastic container alone.
• the plastic containers provided with a closure always have a clearly visible dividing line between the closure and the plastic container, which is often undesirable.
• the closures are also different in color from the plastic container.
• problems arise on the one hand alone from the mostly different materials for the plastic container on the one hand and for the closure on the other hand.
• the shades of the plastic container and the closure do not match exactly. Even if the color tone is largely the same, the usually different surface finish of the closure and the plastic container can lead to different color impressions in the observer.
• the different surface finish is a consequence of the different materials, but also of the different manufacturing processes.
• the plastic container produced in an extrusion blown process can have a glossy surface
• the closure produced mostly in an injection molding process can have a matt surface.
• the dividing line and the differences in color between the closure and the plastic container can also impair the design freedom with regard to the container design.
• the greater height of the container provided with the closure increases the space requirement.
• a plastic container should be modified so that the assembly of a closure is possible without or only with slight change in the height of the plastic container.
• a dividing line between the closure and the plastic container should be avoided as well as aesthetic problems with regard to color deviations between the plastic container and the closure. It is to be created a plastic container that can be produced without major process changes in the extrusion blow. The production cycles should be able to be largely maintained.
• the invention provides an extrusion-blown plastic container which has a container body closed with a container bottom and a container neck adjoining the container body and provided with a pouring opening.
• An inner wall of the container neck has at least one calibrated structuring, which extends at least in regions over a circumference of the inner wall.
• the calibrated structuring is limited towards the container body by accumulation of material.
• the material accumulation is formed as a collar extending at least partially along the circumference of the inner wall and substantially transversely to a central axis of the container neck.
• the structuring can be reproducibly made with predetermined dimensions.
• the tolerances of the mass of the calibrated structuring can be material-dependent within the usual tolerances achievable in the extrusion blow-molding process. Since, in order to form the calibrated structuring, additional plastic material is introduced from the lost tube section adjoining the pouring opening through the pouring opening into the container neck, the tolerances can result, for example, from cooling processes and / or creeping processes of the plastic.
• the excess plastic material not required for the formation of the calibrated structuring limits the accumulation of material formed as a collar to the calibrated structuring. The collar extends in the direction of the central axis of the container neck, ie into the interior of the container neck.
• the calibrated structuring and the collar are integrally formed with the container neck.
• a calibration tool is needed to form the calibrated pattern, wherein the shape of the structuring can be determined by the tool.
• the calibration tool is integrated as a calibration section on the calibration bladder, which is inserted into a plastic tube section inserted in a mold cavity.
• calibrated structuring is meant a structural element which is positively or negatively formed on or in the inner wall of the container neck and which can prevent the calibration tool from being removed from the mold cavity in the opposite direction of movement.
• the calibrated structuring may thus be formed as a projection or as an undercut with respect to the inner wall of the container neck.
• an undercut jumps back to the unstructured course of the inner wall of the container neck by a predetermined amount, this measure can be greater than or equal to 0.25 mm.
• the calibrated structuring is designed as a projection, it projects beyond the unstructured course of the inner wall by a predetermined amount in the direction of a central axis of the container neck, wherein the predetermined dimension can be greater than or equal to 0.25 mm.
• the predetermined mass may be greater than 0.5 mm, preferably greater than 0.7 mm, depending on the neck diameter.
• the Kalibrierblasdorn or the calibration tool is retracted by an exclusively translational movement in the mold cavity. Due to the calibrated structuring, an exclusively translatory removal of the calibration bladder from the mold cavity can be prevented.
• the Kalibrierblasdorn or the calibration tool may be necessary, for example, the Kalibrierblasdorn or the calibration tool by means of a combination of translational and to remove rotational movement from the plastic container.
• the calibration bladder or the calibration tool is removed from the mold cavity together with the plastic container connected to it, and the plastic container is then removed from the Kablibrier blasting mandrel or the calibration tool by utilizing the elasticity of the plastic.
• the calibration tool, or the Kalibrierbleßdorn, with respect to its outer shape is fixed or rigid.
• the calibrating tool or the calibrating section of the calibrating bladder mandrel can be made variable in its shape in order to be able to remove the calibrating tool or the calibrating bladder mandrel from the plastic container after the calibrated structuring has been formed.
• the conditions for the installation of an inner closure are given.
• the at least partially circumscribed calibrated structuring in this case has a depth sufficient to accommodate the inner closure and to keep it safe in the usual drop tests. Due to the possibility of attaching an inner closure, the overall height of the plastic container provided with the closure remains substantially limited to the height of the container itself. The space requirement for the containers provided with closures is thereby reduced.
• the inner closure contributes not or only slightly to the overall height and is virtually invisible in a side view. As a result, the dividing line between the closure and the container, which is usually clearly visible in the case of plastic containers with closure, is eliminated.
• the closure can also be a punctiform design element, ie a color coordinated design element with respect to the plastic container, in the overall appearance of the plastic packaging.
• the plastic packaging usually consists of the plastic container, the closure and a label.
• the described type of closures are tipping closures which, when flush with the pouring opening, remove fabric container to prevent stored substance.
• a central axis of the closure and the central axis of the container neck are generally parallel.
• the tilting shutter is moved to an open position, usually by the center axis of the tilting shutter is inclined relative to the central axis of the container neck and correspondingly enclose the two central axes an acute angle.
• one of the Ausg discernöffhung facing top of the collar which is formed from the excess material, calibrated.
• this calibrated top can form a defined stop surface for the normally injection molded closure for its closed position and open position.
• One of the top of the collar corresponding shape may be formed in the Kalibrierblasdorn, respectively the calibration tool.
• this pressure can also be used to press the accumulation of material against the form corresponding to the upper side in the calibrating tool in order to form the calibrated upper side of the collar.
• the collar can be unstructured on an underside facing away from the ejection opening in the sense that the shape of the underside is shaped by the gas pressure.
• the plastic container does not have to be designed such that an axis of the container body and the center axis of the container neck are congruent or extend in parallel. Rather, the central axis of the container body and the central axis of the container neck can enclose an acute angle with each other, which can be up to 10 °, advantageously up to 20 °, preferably up to 25 °. By suitable manufacturing processes even an acute angle of up to about 45 ° is possible. In such an arrangement, a visible upper surface of the inner closure may be used as a carrier of a logo.
• a contour of the inner wall and a contour of the outer wall of the container neck of the extrusion-blown plastic container are not formed corresponding to one another.
• the contour of the inner wall may be different from the contour of the outer wall.
• the inner wall can have an internal thread and the outer wall can be designed as a circular cylinder with a plane, that is to say substantially unstructured, unimodal lateral surface.
• the outdoor be formed curved wall and the inner wall have at least one undercut for receiving the closure.
• the at least one calibrated structuring on the inner wall of the container neck can be designed differently and thereby also allows the assembly of different types of inner closures.
• the calibrated structures may be configured to seal the closure at any position along the container neck.
• the depth of the undercut against the inner wall is dependent on the cross section of the container neck and the requirements of a drop test from a predetermined height, the unsupported must survive the sealed plastic container.
• the calibrated structuring can be designed in such a way that it is possible to assemble a disk-shaped tilting closure.
• the predetermined amount by which the calibrated patterning projects or recedes from the inner wall of the container neck may be up to about 1.6 mm per side or even more depending on the container neck diameter, container size, and material. It turns out, however, that for a container neck of 38 mm diameter, an article volume of approximately 400 ml and a drop height of 120 cm in conjunction with a disk-shaped closure and using a typical HDPE material, a size of 0.72 mm is calibrated for the calibrated Structuring is sufficient.
• the contour of the calibrated structure of the inner wall of the container neck of the extrusion-blown plastic container is formed on the side contour of the disk-like
• the calibrated pattern has a contour that is similar to a portion of a torus surface. This means that the axial and radial radii of curvature are different from each other.
• the torus surface can be formed on an undercut of the inner wall or on a projection opposite the inner wall.
• the calibrated structuring of the container neck has a contour which resembles a section of a spherical surface. This means that the axial and the radial radius of curvature are the same size.
• a suitable for this embodiment tilt lock then corresponds to a cut from a ball disc.
• the calibrated structuring may be formed as an undercut or as a projection, each with a spherical surface contour.
• the calibrated structuring of the inner wall of the container neck of the extrusion-blown plastic container can merge, at its outlet facing the container body, into an at least partially encircling collar, which has a radial overhang with respect to the inner wall.
• the at least partially encircling collar can serve as a support or abutment for the disc-shaped Kippver gleich.
• the collar can also be designed as an annular shoulder. So that the tiltability is ensured, the disk-shaped tilt lock on a support surface which extends approximately over half of its circumference approximately parallel to a top surface of the tilt lock and approximately from half obliquely to the top surface.
• the annular at least partially circumferential shoulder forms a support surface, wherein the support surface and a central axis of the container neck form an acute angle.
• the disc-shaped tilting closure can be cylindrical. So that its orientation is ensured approximately perpendicular to the container axis, in the inner wall of the container neck also two mutually preferably diametrically opposite support projections may be provided, which engage in lateral recesses or cuts in the support surface of the disc-shaped tilt lock.
• the container neck and the closure can be designed such that even in the open position, the closure seals at predetermined locations within the container neck, so that the container contents can leave the plastic container exclusively at a predetermined location.
• the radial projection of the at least partially encircling annular shoulder with respect to the inner wall of the container neck is about 0.5 mm to 2.5 mm, depending on the container size.
• the at least one calibrated structuring of the inner wall of the container neck is used as a at least one receiving groove designed for a bayonet lock. Because of the better fixation of a closure two or more distributed over the circumference of the inner wall receiving grooves are formed for a bayonet in the inner wall of the container neck.
• extrusion-blown plastic container has a container neck, in which the at least one calibrated structuring of the inner wall of the container neck is designed as an internal thread.
• Thread closures are well known. The over a relatively large extent extending positive engagement between the co-operating threads of the internal thread in the container neck and the external thread on a screw cap allow a reliable hold, which ensures the fulfillment of the required drop tests.
• the calibrated structures for the internal thread are created with the aid of the calibration spike.
• the demolding of the Kalibrierblasdorns is usually done by train. If the elasticity of the material used for the plastic container is too low for a strain relief, the calibration mandrel can also be removed for demoulding.
• an at least partially circumferential groove may be arranged in an outer wall of the container neck.
• a narrowing of the wall thickness which limits the calibration of the container neck and the formation of the at least one undercut a displacement of the plastic material in the subsequent container body.
• the tube section located in the mold cavity is inflated and cooled by means of a Kalibrierblasdorns driven into the tube by an opening in the blow mold into the plastic container by means of a gas injected with excess pressure in accordance with the mold cavity.
• a container neck of the corresponding portion of the plastic tube is calibrated.
• the Kalibrierblasdorn in the hose section is plastic material of a the produced container neck displaced upstream lost portion of the plastic tube in the container neck.
• the retracted Kalibrierblasdorn at least one calibrated structuring is formed in an inner wall of the container neck, the shape of which is determined by an outer contour of a calibration section of the Kalibrierblasdorns.
• the calibrated structuring can be formed as an undercut or as a projection.
• the finished molded plastic container is finally removed from the mold.
• the calibrating bladder mandrel In order for at least one calibrated structuring to be able to be produced in or on the inner wall of the container neck, the calibrating bladder mandrel must have a calibrating section which, for example, has an oversize relative to a diameter of a cylindrical inner section of the container neck. Plastic material is displaced from the container neck into the container body through this diameter-larger area of the calibration bladder.
• the inner wall of the container neck may be formed in addition to a circular contour with an oval or square contour or a combination of round and square, the process described is mutatis mutandis applicable.
• plastic material is displaced from a container neck the neck before stored lost portion of the extruded plastic tube into the container neck when retracting the Kalibrierblasdorns in the cavity located in the mold cavity.
• the plastic material from the lost portion which is sometimes referred to as a neck piece, compensates for the plastic material displaced from the neck portion.
• the lost portion of the extruded plastic tube is usually automatically separated from the container neck at the end of the blowing / calibration process.
• an at least partially circumferential groove can be formed at a transition from the container neck to the container body in a wall of the plastic container. Through this groove, at the transition from the container neck in the container body creates a narrowing of the wall thickness. This narrowing limits the displacement of the plastic material in the subsequent container body during calibration of the container neck and in the formation of the at least one structuring.
• constriction is chosen such that less plastic material can be displaced from the container neck into the container body, as is simultaneously tracked from the lost portion of the plastic tube in the container neck, even more complex structuring, such as successively arranged threads, in the inner wall of the container neck through an exclusively translational movement of the Kalibrierblasdorns are generated with the integrated Kalibrierabites. Since the displacement of the plastic material is hindered by the constriction, it is locally compressed for a short time, in order then to expand again into the voids located between the larger diameter areas of the calibration section.
• an at least partially encircling annular shoulder can be formed at a transition from the container neck to the container body, preferably at a transition from the calibrated structuring to the container body, which has a radial projection with respect to the inner wall of the container neck.
• the at least partially circumferential annular shoulder is preferably formed with a radial projection of about 0.5 mm to 2.5 mm. It can serve as a support surface or as an abutment when mounting a disk-shaped KippverBankes. So that the tiltability is ensured, the disk-shaped tilt lock is formed with a support surface which extends approximately over half of its circumference substantially parallel to a top surface of the tilt lock and approximately from half obliquely to the top surface.
• a further embodiment variant of the method according to the invention can provide that the annular at least partially circumferential shoulder is formed in such a way that the shoulder and a central axis of the container neck enclose an acute angle.
• the disk-shaped tilt lock can be made cylindrical.
• the outer contour of the Kippver gleiches have any outer contour. It may for example be oval, triangular, quadrangular or polygonal. So that its orientation is ensured approximately perpendicular to the container axis, in the inner wall of the container neck also two mutually preferably diametrically opposite support projections are formed, which engage in lateral recesses or cuts in the support surface of the disk-shaped tilt lock.
• the contour of the calibrated structuring of the inner wall of the container neck of the extrusion-blown plastic container is adapted during calibration to the side contour of the disk-shaped tilt closure.
• the calibrated structuring of the container neck may be formed with a contour that is similar to a portion of a torus surface. This means that the axial and the radial radius of curvature of the structuring are different from each other.
• the calibrated structuring of the inner surface of the container neck can be provided with a contour that is similar to a section of a spherical surface. This means that the axial and the radial radius of curvature are the same size.
• a suitable for this embodiment tilt lock then corresponds to a cut from a ball disc.
• a contour of the inner wall and a contour of the inner wall opposite the outer wall can not be formed corresponding to each other, so that, for example, the outer contour is flat and the inner contour has at least one calibrated structuring.
• the inner surface of the container neck can be provided with one or more mounting grooves for a bayonet closure.
• an internal thread can be created in the inner wall of the container neck.
• FIG. 1 shows a half-side, axially sectional view of a retracted in a blow mold Kalibrierblasdorns
• FIG. 2 shows an axial section of a container neck with a plate-shaped tilting closure in the closed position
• Fig. 3 shows the plate-shaped tilting lock of Figure 2 in the open position.
• FIG. 4 shows a variant of a calibration blast mandrel inserted into a blow molding tool in a representation analogous to FIG. 1;
• FIG. 5 shows a further axial section of a container neck with a disc-shaped tilting closure in an open position
• Fig. 6 shows the known from Figure 5 representation with a tilt lock in a closed position.
• FIG. 1 shows an axial section of a half side of a calibrating blow mandrel inserted into a mold cavity of a blow molding tool for producing a plastic container, which carries the reference numeral 2 in its entirety.
• the blow molding tool of which only an upper, in particular for the formation of a container neck formed portion is shown, bears the reference numeral 3.
• the mold cavity is provided with the reference numeral 33.
• a container neck 11 is provided with a provided with the reference numeral 1 plastic container.
• a container body 12 connects. For the sake of clarity, it has been omitted to provide the cut container neck 11 and the container body 12 with hatching.
• Fig. 1 shows the Kalibrierblasdorn 2 in its end position in which a stop 21 of the Kalibrierblasdorns 2 abuts against an abutment 31 of the blow mold 3.
• the calibration bladder 2 has a calibration section 22, the outer contour of which is shown in FIG. Asked embodiment is formed curved approximately spherical surface. Instead of a spherical surface shape, the calibrating section 22 could also have the shape of a torus surface.
• the calibration section 22 is adjoined by a nozzle part 24, via which a gas is injected with overpressure in order to inflate an extruded plastic hose section in the mold cavity 33 according to the mold cavity 33 to the plastic container 1.
• a Nachdrückabêt 25 is arranged, whose function will be explained in more detail below.
• the blow molding tool 3 has an input section 35 which ends at an edge projection 32. This edge projection 32 is formed in the plastic container 1 as a constriction.
• the container neck 11 is then essentially along its deepest constriction, which later forms a neck edge 16 of the container neck 11 and is shown here as a dotted line, from a section of the container adjacent to the container neck 11 and located above the neck edge 16 Plastic hose 18 separated.
• This portion of the plastic tube 18, which is located between the inlet portion 35 of the blow molding 3 and the Nachdrückabêt 25 of the caliber rierblasdorns 2, is referred to as a lost tube section or as a neck.
• the calibrated undercut 19 formed in the inner wall 13 has, for example, a spherical-surface-shaped or a torus-shaped contour.
• a spherical-surface-shaped or a torus-shaped contour In support of the Forming of the at least partially encircling annular shoulder 14 may be formed in an inner wall opposite the inner wall of the container neck 11, at the transition to the container body 12 an at least partially annular groove 15, wherein a remaining part of the outer wall as a straight flat Kreiszy- linder, ie without sink marks , is trained.
• a contour of the outer wall of a contour of the inner wall 13 is so different that these two contours do not correspond with each other.
• the groove 15 generates at the transition from the container neck 11 to the container body 12, a wall thickness restriction, which opposes the displacement of the plastic material from the container neck 11 into the container body 12 a resistance.
• a wall thickness restriction which opposes the displacement of the plastic material from the container neck 11 into the container body 12 a resistance.
• the calibrated structuring in the form of an undercut 19 is limited by the annular shoulder 14.
• the annular shoulder 14 is formed from the plastic which has been displaced from the section of the plastic tube 18 located above the neck edge 16 into the container neck 11 through a pouring opening at the neck edge 16 and after the design of the calibrated pattern 19 is excessive.
• the excess plastic forms a build-up of material 100 which is deformed by the gas pressure needed to inflate the tube section loaded in a blow mold 3.
• a Ausg discernöf hung facing calibrated top 36 is formed, which corresponds to a formed in the Kalibrierabrough 22 corresponding shape 37, which is here designed disk-shaped.
• This calibrated top 36 can be used as a stopper for all types of closures.
• One of the top 36 opposite and facing away from the pouring bottom 38 is formed in the present embodiment by the gas pressure and is thus unstructured.
• the calibrated structuring in the form of an undercut 19 produced in the inner wall 13 of the container neck 11 has a depth greater than or equal to 0.25 mm in relation to an unstructured contour of the inner wall 13.
• the undercut 19 extends over about 3/5 to about 8/9 of the axial length of the container neck 11; their depth is greater than about 0.5 mm, preferably greater than about 0.7 mm, depending on the size of the container neck or container neck diameter.
• the at least partially encircling annular shoulder 14, which may also be formed as a closed ring, facing the inner wall 13 of the container neck 11 has a radial projection of about 0.5 mm to about 2.5 mm.
• the thus formed container neck 11 is prepared for receiving an inner closure, which may be formed as a plate-shaped Kippver gleich.
• FIG. 2 and 3 show a plate-shaped tilting lock 5 mounted in the container neck 11 in the closed (FIG. 2) and in the open position (FIG. 3).
• the plate-shaped tilting closure 5 has a support surface 51 with a first support section 52, which extends approximately over half of its circumferential extent approximately parallel to a cover surface 55 of the tilt lock 5.
• An adjoining second support portion 53 extends obliquely inclined to the top surface 55.
• the plate-shaped tilt lock 5 is supported on the annular peripheral shoulder 14 from. In the closed position, its first support section 52 extending parallel to the cover surface 55 lies on the annular peripheral shoulder 14 (FIG. 2). In the open position, the obliquely extending second support portion 53 rests on the annular peripheral shoulder 14 (FIG. 3).
• two preferably diametrically opposed calibrated undercuts 19 may be formed as support projections 17 which engage in lateral recesses 54 and cuts in the support surface 51 of the plate-shaped or disc-shaped tilt lock 5.
• the contour of the formed in the inner wall 13 undercut 19 of the container neck 11 of the extrusion-blown plastic container 1 is adjusted during calibration to the side contour of the disk-like KippverBankes 5.
• the annular circumferential shoulder 14 which forms a bearing surface for the closure, can also be designed such that the bearing surface and a central axis of the container neck form an acute angle.
• the plate-shaped tilting closure 5 can have an overall cylindrical shape with a support surface extending essentially parallel to the cover surface 55. The tiltability of the plate-shaped closure 5 is tilted by the Forming the annular peripheral shoulder 14 ensures.
• two preferably diametrically opposite support projections 17 can be formed in the inner wall 13 of the container neck 11, which in lateral recesses or incisions 54 in the support surface of the disc-shaped Tilt lock 5 intervene.
• FIG. 4 shows a variant of a calibration bladder, which in turn bears the reference numeral 2 in its entirety, in a representation analogous to FIG. The same parts therefore bear the same reference numerals as in Fig. 1.
• the calibration section 22 of the Kalibrierblasdorns 2 threaded projections 27 on.
• the thread projections 27 of the Kalibrierblasdorns 2 form in the inner wall 13 of the container neck 11 from an undercut 19, which has the shape of an internal thread.
• the push-back section 25 of the calibration bladed mandrel 2 causes plastic material to be displaced from the lost tube section 18 into the container neck 11 when the calibration bladder 2 is moved in exclusively translationally.
• Plastic material from the container neck 11 is displaced into the container body 12.
• an annular at least partially circumferential shoulder 14 is generated at the transition from the container neck 11 to the container body 12 again.
• FIGS. 5 and 6 show a longitudinal section through the container neck 11 with the container body 12 adjoining the container neck 11, each with a closure 5 mounted in the container neck 11 in its respective end position.
• Fig. 5 shows the disc-shaped closure 5 in its open position
• Fig. 6 shows the disc-shaped closure 5 in its closed position.
• the exemplary embodiments according to FIGS. 2 and 3 have dispensed with the support projections in the calibrated structuring and the lateral notches in the support surface 51 in the present exemplary embodiment.
• the first support section 52 which extends substantially parallel to the cover surface 55, adjoins the second support section 53, which extends obliquely inclined to the cover surface 55.
• a closure side wall 57 extends circumferentially, the outer wall 58 facing the hollow-spherical undercut 19 being designed as a ball.
• the undercut 19 and the outer wall 58 of the closure side wall 57 are corresponding.
• the closure 5 in the closure side wall 57 has a pouring opening 56.
• a finger recess 54 is formed in the top surface of the closure 5, which indicates to the person using which position the closure has to be pressed in order to move the closure 5 to shift to the open position shown in Fig. 5.
• stockpiled material can be taken out through the pouring opening 58 in the container body 12.
• a central axis II-II of the closure 5 is obliquely inclined with respect to a central axis II of the container neck 11.
• the second support section 53 is defined on the calibrated upper side 36 of an annular circumferential shoulder 14 formed from a material accumulation 100.
• the underside 38 which is unstructured, faces the calibrated upper side 36 opposite the container body 12.
• the calibrated upper surface 36 extends substantially transversely to the central axis II of the container neck 11.
• the calibrated upper surface 36 adjoins the calibrated structuring formed in the inner wall 13 of the container neck 11 in the form of a hollow-spherical undercut 19.
• An outer wall 20 opposite the inner wall 13 is referred to as straight circular cylinder formed, which is due to the excess of plastic, which ultimately forms the accumulation of material 100 and thus the circumferential annular shoulder 14, without default and not with a contour of the inner wall 13 is corresponding.
• groove between the container neck 11 and the container body 12 has been omitted in the two present embodiments.
• Fig. 6 shows the known from Fig. 5 arrangement in the closed position.
• the first bearing portion 52 is predetermined at the top 36 of the circumferential annular shoulder 14.
• the pouring opening 36 is replaced by the calibrated structure. closed in the form of a hollow-spherical undercut 19.
• the calibrated structuring in the form of a hollow-spherical undercut 19 and the spherical closure side wall 57 cooperate in such a way that no material stored in the container body 12 enters the environment.
• the top surface 55 of the closure 5 and the neck edge 16 are flush with each other. Further, the central axis II of the container neck 11 and the central axis II-II of the closure 5 coincide.
• calibrated structuring 19 of the inner wall 13 of the container neck 11 has been explained with reference to FIGS. 1 and 4, which can be designed as a single large-area undercut having a spherical-surface-shaped or torus-shaped contour (FIG. 1) or by an internal threading in FIG Inner wall 13 (Fig. 4) is formed.
• one or more calibrated structurings can be designed in the form of one or more mounting grooves for a bayonet closure.
• the calibrated patterns may also be one or more circumferentially spaced images for one or more
• Schnappwülste be formed. This allows, for example, the installation of a known multi-part tilting closure, which can be arranged invisibly in the interior of the container neck, however, in contrast to the prior art.
• a section of a plastic tube which is extruded continuously or discontinuously by an extrusion head is introduced into a mold cavity of a blow molding tool.
• a second process step which is located in the mold cavity
• Hose section inflated by means of a retracted by an opening in the blow mold into the tube Kalibrierblasdorns inflated by an over-pressure gas according to the mold cavity to the plastic container and cooled.
• a container neck of the corresponding portion of the plastic tube is calibrated.
• Hose section plastic material displaced from a the container neck produced upstream lost portion of the plastic tube in the container neck.
• at least one calibrated structuring is formed in or on an inner wall of the container neck, the shape of which is determined by an outer contour of a calibration section of the Kalibrierblasdorns.
• the calibrated structuring may be formed as an undercut receding from the inner wall by a predetermined amount, or as a projection protruding from the inner wall of the container neck by a predetermined amount.
• the finished molded plastic container is finally removed from the mold.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Ceramic Engineering (AREA)
• Manufacturing & Machinery (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Containers Having Bodies Formed In One Piece (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)

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• 2012
  • 2012-11-30 CH CH02631/12A patent/CH707260A1/de not_active Application Discontinuation
• 2013
  • 2013-11-22 CN CN201380061932.0A patent/CN104995010B/zh not_active Expired - Fee Related
  • 2013-11-22 EP EP13798574.3A patent/EP2925505A1/de not_active Withdrawn
  • 2013-11-22 BR BR112015011904A patent/BR112015011904A2/pt not_active IP Right Cessation
  • 2013-11-22 IN IN3755DEN2015 patent/IN2015DN03755A/en unknown
  • 2013-11-22 WO PCT/EP2013/003525 patent/WO2014082721A1/de active Application Filing
  • 2013-11-22 MX MX2015006098A patent/MX2015006098A/es unknown
  • 2013-11-26 AR ARP130104341A patent/AR093604A1/es unknown
• 2015
  • 2015-05-27 US US14/722,680 patent/US20170066549A9/en not_active Abandoned

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