WO2016124749A1 - Moule pour capuchon de fermeture à sommet basculant - Google Patents

Moule pour capuchon de fermeture à sommet basculant Download PDF

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Publication number
WO2016124749A1
WO2016124749A1 PCT/EP2016/052525 EP2016052525W WO2016124749A1 WO 2016124749 A1 WO2016124749 A1 WO 2016124749A1 EP 2016052525 W EP2016052525 W EP 2016052525W WO 2016124749 A1 WO2016124749 A1 WO 2016124749A1
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WO
WIPO (PCT)
Prior art keywords
mold
flip
molding
pivotable
mold portion
Prior art date
Application number
PCT/EP2016/052525
Other languages
English (en)
Inventor
Manfred HAUER
Original Assignee
Schöttli AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schöttli AG filed Critical Schöttli AG
Publication of WO2016124749A1 publication Critical patent/WO2016124749A1/fr

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Classifications

    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C45/006—Joining parts moulded in separate cavities
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0081—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of objects with parts connected by a thin section, e.g. hinge, tear line
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2618—Moulds having screw-threaded mould walls
    • B29C45/262—Moulds having screw-threaded mould walls provided with unscrewing drive means
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2681—Moulds with rotatable mould parts
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • 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
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers

Definitions

  • the present technology relates to injection molding systems in general and specifically to a mold for a flip-top closure cap.
  • Molding is a process by virtue of which a molded article can be formed from molding material by using a molding system.
  • Various molded articles can be formed by using the molding process, such as an injection molding process.
  • One example of a molded article that can be formed is a closure for a beverage container.
  • closures can be made, depending on the type of the beverage container that the closure is to be used with.
  • the closure is designed with specific design considerations in mind. For example, a closure for a carbonated beverage is different in design from a closure for flat water (at least in the sealing features used for the closure for the carbonated beverage).
  • closures One type of closure known in the art is a flip-top closure having a live hinge. These types of closures are used for sport beverages, sauces containers (such as mayonnaise containers, ketchup containers and specialty sauces containers), as well as shampoo containers, hand cream containers, household cleaning products and the like.
  • sauces containers such as mayonnaise containers, ketchup containers and specialty sauces containers
  • a mold for forming and closing the one piece flip-top cap prior to ejection from the mold includes a first mold part, an inner core mold part and a second mold part movable into relationship with the first mold part and the inner core mold so as to form a mold cavity therebetween.
  • the mold produces a one piece flip-top cap with a living hinge between the body and lid of the cap and which is maintained in a closed position upon ejection from the mold. Pull straps are used to ensure full closure of the cap lid to the body prior to ejection.
  • WO2004/074129 published to Caruana on September 2 nd , 2004 teaches a flip- over capping member for a fluid container with aperture extending axially along a longitudinal axis (X-X), comprising: - a tubular body (1 ) having an end wall (3) which is transverse with respect to the longitudinal axis (X-X), - an aperture (9), for dispensing fluid from the container (8), formed in the end wall (3), - a capping member (10), for closing and opening the aperture (9), connected radially to the tubular body (1 ) by means of an integrally formed flexible element (1 1 ) wherein the capping member (10) can close the aperture (9) by a bending movement about a transverse axis of rotation (R-R) in the area of the flexible element (1 1 ).
  • the radial position of the axis of rotation (R-R) does not extend outside the peripheral edge (6) of the end wall (3).
  • Embodiments of the present technology have been developed based on developers' appreciation of at least one shortcoming associated with the prior art solutions and approaches to producing flip-top closure caps.
  • an injection mold for molding a flip-top closure cap having a body portion and a flip-top portion attached to the body portion via a live hinge.
  • the injection mold comprises: a first mold portion for defining a first portion of the flip-top closure cap; a second mold portion for defining a second portion of the flip-top closure cap; the first mold portion including a pivotable mold portion configured to define a portion of the first portion of the flip-top closure cap, the pivotable mold portion is configured to be rotatable about a first centerline, which is spatially offset from a hinge centerline of the live hinge, the rotation of the pivotable mold portion is for affecting, during a de-molding portion of a molding cycle of operation of the injection mold : (a) urging the flip-top closure cap towards the body portion, and (b) de-molding the flip-top portion from at least a portion of the first mold portion.
  • the first core mold portion further comprises: a first core mold portion for defining a portion of an inner surface of the body portion.
  • the first core mold portion is configured to define a threaded portion of the inner surface of the body portion and the first core mold portion is rotatable for affecting unscrewing of the flip-top closure cap off the first core mold portion during a portion of the de-molding portion of the molding cycle.
  • the injection mold further comprises a first core mold portion actuator for actuating rotation of the first core mold portion.
  • the first mold portion further comprises a stripper insert for stripping the flip-top closure cap off the first core mold portion.
  • the stripper insert is coupled, in use, to a stripper plate.
  • the second mold portion comprises a cavity plate with a second core mold portion and a third core mold portion being housed into a respective bore defined therethrough.
  • the third core mold portion is associated with an ejector, the ejector being configured to: during an initial stage of a mold opening of the de-molding portion of the molding cycle, during which the first mold portion is separated from the second mold portion, the ejector is configured to urge the flip-top portion off the third core mold portion such that it remains within a molding surface of the pivotable molding portion.
  • the ejector comprises an ejector rod and an ejector actuator, the ejector rod being accommodated in a bore defined in the third core mold portion.
  • a lower-most extreme of the ejector rod in a mold closed configuration is substantially flush with a lower-most extreme of the third mold portion, together defining a molding surface.
  • rotation of the pivotable mold portion from a molding configuration to an ejection configuration results in a gap being defined between a molding surface of the pivotable mold portion and the portion of the first portion of the flip-top closure cap.
  • the injection of the injection mold further comprises a pivotable mold portion actuator for actuating the pivotable mold portion from a molding configuration to an ejection configuration.
  • the pivotable mold portion actuator comprises a rack-and-pinion type actuator.
  • the portion of the first portion of the flip-top closure cap is an outer surface of the body portion.
  • the pivotable mold portion comprises a protrusion molding member for defining a depression on the flip-top portion and rotation of the pivotable mold portion is further for affecting de-molding of the depression from the protrusion molding member.
  • a pivotable mold portion for use in an injection mold for molding a flip- top closure cap having a body portion and a flip-top portion attached to the body portion via a live hinge.
  • the injection mold includes a first mold portion for defining a first portion of the flip-top closure cap; and a second mold portion for defining a second portion of the flip-top closure cap.
  • the pivotable mold portion is configured: to define a portion of the first portion of the flip-top closure cap, the pivotable mold portion is configured to be rotatable about a first centerline, which is spatially offset from a hinge centerline of the live hinge, the rotation of the pivotable mold portion is for affecting, during a de-molding portion of a molding cycle of operation of the injection mold : (a) urging the flip-top closure cap towards the body portion, and (b) de-molding the flip-top portion from at least a portion of the first mold portion; the pivotable mold portion further comprising a pivotable mold portion actuator for actuating the pivotable mold portion from a molding configuration to an ejection configuration.
  • the pivotable mold portion actuator comprises a rack-and-pinion type actuator.
  • Figure 1 depicts a cross-section view of a portion of a mold, the mold being implemented in accordance with non-limiting embodiments of the present technology, the mold being depicted during the molding and cooling portions of the molding cycle.
  • Figure 2 depicts a cross-section view of the portion of the mold of Figure 1 , the mold being depicted during a first portion of the molded article ejection cycle, where a pivotable portion of the mold of Figure 1 is being rotated through a portion of its rotational path.
  • Figure 3 depicts a cross-section view of the portion of the mold of Figure 1 , the mold being depicted during a second portion of the molded article ejection cycle, where the pivotable portion has been rotated through the complete rotational path.
  • Figure 4 depicts a cross section of a pivotable mold portion of a mold implemented in accordance with another non-limiting embodiment, the Figure 4 showing the pivotable mold portion transitioning from a molding configuration to an ejection configuration.
  • FIG. 1 there is depicted a cross-section view of a portion of a mold 102, the mold 102 being implemented in accordance with non- limiting embodiments of the present technology.
  • the mold 102 is for producing a flip-top closure cap 104.
  • the flip-top closure cap 104 comprises a closure body 106 and a flip-top portion 108, connected to the closure body 106 via a live hinge 1 10.
  • the mold 102 is depicted in a mold closed configuration, which is maintained during appropriate portions of the molding cycle (such as injection and cooling of the flip-top closure cap 104).
  • injection molding machines are well known in the art and, as such, will not be described here at any length. A detailed description of these known injection molding machines may be referenced, at least in part, in the following reference books (for example): (i) "Injection Molding Handbook” authored by OSSWALD/TURNG/GRAMANN (ISBN: 3-446-21 669-2), (ii) "Injection Molding Handbook” authored by ROSATO AND ROSATO (ISBN: 0- 412-10581 -3), (iii) "Injection Molding Systems” 3rd Edition authored by
  • the mold 102 comprises a first mold portion 1 12 and a second mold portion 1 14, the first mold portion 1 12 for defining a first portion of the flip-top closure cap 104 and the second mold portion 1 14 for defining a second portion of the flip-top closure cap 104.
  • the first mold portion 1 12 comprises: a first core mold portion 1 16, a mold insert 1 18, a stripper insert 120 and a pivotable mold portion 134.
  • the general purpose of the first core mold portion 1 1 6 is to define an inner surface of the closure body 106. More specifically, the first core mold portion 1 1 6 defines, amongst other things, a threaded portion 122 of the closure body 106. To the extent that the threaded portion 122 of the closure body 106 may include a pronounced profile (depending on the size of the flip-top closure cap 104, of course), it may not be possible to simply "bump off" the flip-top closure cap 104 from the first core mold portion 1 16 during de-molding thereof.
  • the first core mold portion 1 1 6 can be configured to rotate, as depicted at 124 in Figure 1 , to allow for de-molding of the flip-top closure cap 104 from the first core mold portion 1 1 6 by means of screwing off the flip-top closure cap 104 from the first core mold portion 1 1 6 by means of rotating the first core mold portion 1 1 6.
  • Rotation of the first core mold portion 1 16 can be actuated by a suitable actuator, which is not depicted, which can be
  • the general purpose of the mold insert 1 18 is to define a first outer portion of the body portion 106, as well as a first portion of the flip-top portion 108 (including a portion of the live hinge 1 10).
  • the mold insert 1 18 can be implemented as a split mold insert.
  • the mold insert 1 18 can be made of two or more complementary parts, which can be actuated together and apart during the appropriate portions of the molding cycle. Actuation of the parts of the mold insert 1 18 can be implemented by known techniques, such as using slides (not depicted) associated with suitable actuators (also not depicted), such as cams, servo motors and the like.
  • the stripper insert 120 is associated with a stripper plate 1 19, the stripper plate 1 19 being actuatable in an axial direction (up and down, as viewed in the orientation of Figure 1 ) to assist in stripping the flip-top closure cap 104 off the first core mold portion 1 16, during the appropriate portion of the molding cycle, as will be described in greater detail herein below.
  • the general purpose of the pivotable mold portion 134 is (i) to define a portion of an outer surface of the flip-top portion 108, and (ii) to affect rotation of the flip-top portion 108 towards the body portion 106 during an appropriate portion of the molding cycle.
  • the pivotable mold portion 134 can be associated with an actuator 198.
  • the implementation of the actuator 198 is generally known to those of skill in the art. Broadly speaking the actuator 198 can be implemented as a servo motor or any other suitable type of an actuator. Generally speaking, the actuator 198 is configured to actuate the pivotable mold portion 134 from the molding configuration depicted in Figure 1 to an ejection configuration depicted in Figure 3, which ejection configuration will be explained in greater detail herein below.
  • Implementations of the actuator 198 for the pivotable mold portion 134 are not particularly limited. As one example, a rack-and-pinion arrangement can be used. Naturally, any other type of the actuator 198 can be used to actuate the pivotable mold portion 134.
  • the pivotable mold portion 134 is pivotable from the molding configuration to an ejection configuration, the latter being depicted as a pivotable mold portion 134'.
  • the pivotable mold portion 134 is configured to be rotatable (such as under control of the actuator) about a first centerline 190, which is spatially offset from a hinge centerline 192.
  • the hinge centerline 192 is the centerline of hinging of the live hinge 1 10.
  • the rotation of the pivotable mold portion 134 is for affecting, during the de-molding portion of the molding cycle of operation of the injection mold 102 the following functions: (a) urging the flip-top portion 108 towards the body portion 106, and (b) de-molding the flip-top portion 108 from at least a portion of the second mold portion 1 14. More specifically, the rotation of the pivotable mold portion 134 allows the de-molding of the flip-top 108 from the molding surface of the pivotable mold portion 134.
  • the second mold portion 1 14 comprises: a second core mold portion 126, a third core mold portion 128 and a cavity plate 132. It is noted that the second core mold portion 126 and the third core mold portion 128 are housed in the cavity plate 132 through respective bores (not separately numbered) defined therein. These components of the second mold portion 1 14 will now be described in detail.
  • the general purpose of the second core mold portion 126 is to define, in cooperation with the aforementioned first core mold portion 1 16, a portion of the closure body 106, namely a portion of a spout (not separately numbered) of the closure body 106.
  • the general purpose of the third core mold portion 128 is to define an inner portion of the flip-top portion 108.
  • the cavity plate 132 also comprises molding surfaces for defining portions of the flip-top closure cap 104, namely a portion of the aforementioned spout and a portion of the live hinge 1 10. It is noted that in alternative embodiments, the molding surfaces presently defined on the cavity plate 132 can be defined on cavity plate inserts (not depicted), as is well known to those of skill in the art.
  • the third core mold portion 128 comprises an ejector 130.
  • the ejector 130 comprises an ejector rod 129 and an ejector actuator 131 .
  • the ejector rod 129 is accommodated in a hollow body (not separately numbered) of the third core mold portion 128. In the mold closed configuration depicted in Figure 1 , the lower-most extreme of the ejector rod 129 is
  • the ejector actuator 131 is configured to actuate the ejector rod 129 in an axial direction, i.e. up and down, as viewed in the orientation of Figure 1 , during the appropriate portions of the ejection cycle and the mold-opening of the mold 102. More specifically, during a portion of the ejection cycle when (i) the pivotable mold portion 134 and the first core mold portion 1 1 6, the mold insert 1 18 and the stripper insert 120 are urged away from (ii) the second core mold portion 126, the third core mold portion 128, the cavity plate 132, the ejector actuator 131 is configured to actuate the ejector rod 129 forward (i.e. down, as viewed in the orientation of Figure 1 ), which in turn urges the flip-top portion 108 off the third core mold portion 128, effectively causing the flip-top portion 108 to remain within a cavity defined by the pivotable mold portion 134.
  • the core actuator 130 is depicted as a pneumatic actuator, but this does not need to be so in every embodiment of the present technology and other suitable types of actuators can be used (such as servo motors, hydraulic actuators, mechanical actuators, electro-mechanical actuators and the like).
  • the flip-top portion 108 comprises a depression 140.
  • the depression 140 can be part of a design feature for the flip-top portion 108.
  • the depression 140 can serve a utilitarian purpose, such as providing a grip surface for the user to grip when using the flip-tip closure cap 104.
  • the grip surface provided for by the depression 140 can enable the user, when using the flip-tip closure cap 104 to more easily open the flip-top portion 108.
  • the pivotable mold portion 134 comprises a protrusion molding member 142.
  • Embodiments of the present technology will be described using the example of the pivotable mold portion 134 having the protrusion molding member 142.
  • the additional special technical effect attributable to embodiments of the present technology is associated with the ability to more easily de-mold the undercut created by the depression 140 from the pivotable mold portion 134.
  • embodiments of the present technology are equally applicable to those types of the pivotable mold portion 134 that do not contain any protrusions for defining undercuts on the flip-top portion 108 (for example, as is schematically depicted in Figure 4).
  • molding surfaces (not separately numbered) of the first core insert 1 1 6, the mold insert 1 18, the second core mold portion 126, the third core mold portion 128, the cavity plate 132 and the pivotable mold portion 134 jointly define, in the mold-closed configuration depicted in Figure 1 , a molding cavity 141 , in which the flip-top closure cap 104 is formed.
  • the illustration of the mold 102 has been greatly simplified with multiple features of the mold 102 having been omitted from either the illustration of the mold 102 or the description of the mold 102.
  • These multiple features include (but may not be limited to): cooling channels of the various components of the mold 102; a hot runner nozzle and other components of a hot runner for supplying molten material into the molding cavity 141 , where such hot runner is utilized or details of a cold runner, where such cold runner is utilized; the various plates housing the components of the mold 102, actuators for actuating the various plates apart, thus actuating the mold 102 from the mold closed configuration of Figure 1 to the mold open configuration of Figure 4 (to be described below) and together to actuate the mold 102 into the molding closed configuration.
  • the mold 102 as depicted in Figure 1 is depicted as a single- cavity mold (i.e. the mold 102 for producing a single instance of the flip-top closure cap 102).
  • a typical commercial implementation of the mold 102 includes several instances of the cavities (i.e. being of a multi-cavitational type). It is expected that those skilled in the art will be able to adapt teachings presented herein in respect to a single-cavity implementation of the mold 102 to a multi-cavitational implementation of the mold 102.
  • a potential location for a hot runner nozzle can be as depicted at 196.
  • Those skilled in the art will be able to select an appropriate location for the hot runner nozzle in the multi-cavitational implementation of the mold 102, such as for example, defining the hot runner nozzle receptacle through the second core mold portion 126. It is also expected that those skilled in the art will be able to select an appropriate configuration for the hot runner (for example, thermally gated hot runner nozzles vs valve gated hot runner nozzles).
  • the mold 102 is actuated into the mold closed configuration (as depicted in Figure 1 , although without the flip-top closure cap 104 yet having been formed).
  • the actuation of the mold 102 into the mold closed configuration is generally known in the art and will not be described herein at any length.
  • Tonnage is then applied by known means (such as a clamp assembly of the injection molding system that houses, in use, the mold 102) to hold the first mold portion 1 12 and the second mold portion 1 14 together to define the molding cavity 141 , the tonnage being applied to counteract the pressure of the molding material being injected into the molding cavity 141 through the hot runner nozzle (not depicted).
  • known means such as a clamp assembly of the injection molding system that houses, in use, the mold 102
  • Tonnage being applied to counteract the pressure of the molding material being injected into the molding cavity 141 through the hot runner nozzle (not depicted).
  • the molding material used for producing the flip-top closure cap 102 can be polypropylene (PP).
  • PP polypropylene
  • the choice of material for producing the flip-top closure cap 102 is considered to be within the purview of a person skilled in the art.
  • the molding material is injected into the molding cavity 141 to fill the molding cavity 141 . Thereafter, the process of cooling and holding commences. As the flip-top closure cap 104 cools down, it tends to shrink. A certain amount of molding material can be added to the molding cavity 141 to ensure that the final shape of the flip-top closure cap 104 is maintained, the process generally known as packing or holding in the art. When the flip-top closure cap 104 has been sufficiently cooled to a temperature that is substantially safe for defect-free ejection, a process of ejection commences.
  • the tonnage is dis-engaged through known techniques, such as dis-engaging the clamp of the injection molding machine (not depicted).
  • the pivotable mold portion 134 and the first core portion 1 1 6 are urged away from the cavity plate 132 (with the second core mold portion 126 and the third core mold portion 128 housed therein).
  • the urging of the pivotable mold portion 134 and the first core portion 1 16 can be executed by means of moving a moving platen (not depicted) of the injection molding machine (not depicted) that houses, in use, the mold 102 being urged away from the stationary platen (not depicted) of the mold 102 that houses the cavity plate 132.
  • moving platen houses, amongst other components: the core mold portion 1 1 6, the mold insert 1 18, the stripper insert 120 and the pivotable mold portion 134 or, more generally, components of the first mold portion 1 12;
  • stationary platen houses, amongst other components: the second core mold portion 126, the third core mold portion 128 and the cavity plate 132 or, more generally, components of the second mold portion 1 14.
  • first mold portion 1 12 can also be referred to as a "moving mold portion” and the second mold portion 1 14 can be referred to as a "stationary mold portion”. Needless to say, the association of the first mold portion 1 12 and the second mold portion 1 14 with the moving platen and the stationary platen can be reversed.
  • the ejector 130 is actuated to ensure that the flip-top portion 108 is urged off the third core mold portion 128 and that it remains within the molding surface of the pivotable molding portion 134. More specifically, the ejector actuator 131 actuates the ejector rod 129 in the downward directions, as viewed in the orientation of Figure 1 . At a certain point thereafter, the ejector rod 129 is reset to its molding configuration, where the lower-most extreme of the ejector rod 129 is substantially flush with the lower-most extreme of the third mold portion 128, together defining the molding surface.
  • FIG. 2 there is depicted a cross-section view of the portion of the mold 102 during a first portion of the ejection cycle, where the pivotable mold portion 134 is being rotated through a portion of a rotational path 302 (roughly, three quarters of the rotational path 302). It should be recalled that the pivotable mold portion 134 is rotatable about the first centerline 190, which is spatially offset from the hinge centerline 192 (the latter not being depicted in Figure 2).
  • FIG. 3 there is depicted a cross-section view of the portion of the mold 102 during the second portion of the article ejection cycle, where the pivotable mold portion 134 has been rotated through the complete rotational path 302.
  • the flip-top portion 108 has been joined with the closure body 106.
  • the gap 194 has been created, effectively allowing the flip-top portion 108 to be, at least partially, de-molded from the molding surface of the pivotable mold portion 134.
  • the first core mold portion 1 16 is moved away from the pivotable mold portion 134.
  • the first core portion 1 1 6 with the flip-top closure cap 104 contained thereupon is moved pass the mold insert 1 18.
  • the mold insert 1 18 is implemented as a split mold insert, the parts of the mold insert 1 18 are actuated apart prior to moving of the first core mold portion 1 1 6 past the mold insert 1 18.
  • the first core mold portion 1 1 6 is then rotated (by actuation of the actuator, which is not depicted), effectively stripping off the flip-top closure cap 104 off the first core mold portion 1 1 6 by means of un-screwing the flip-top closure cap 104 off the first core mold portion 1 1 6.
  • the stripper plate 1 19 is then actuated forward (in the upward direction as viewed in the orientation of Figure 3), whereby the stripper inserts 120 assist in stripping the flip-top closure cap 104 off the first core mold portion 1 1 6.
  • the stripper plate 1 19 can be actuated by a known actuator, which is not depicted.
  • the flip-top closure cap 104 can then be removed by either free-falling or by a removing apparatus, not depicted but generally known to those of skill in the art.
  • a technical effect of some embodiments of the present technology includes partially de-molding of the flip-top closure cap 104 from the pivotable mold portion 134, as it is being repositioned with the rotation of the pivotable mold portion 134. This effect is achieved, at least partially, by the provision of the pivotable mold portion 134 that is configured to be rotatable the first centerline 190, which is spatially offset from the hinge centerline 192 (and the creation of the gap 194).
  • the flip-top portion 108 includes the depression 140
  • the additional technical effect can be realized. Namely, as the flip-top closure cap 104 is being repositioned with the rotation of the pivotable mold portion 134, the creation of the gap 194 also allows for the depression 140 to be freed from the protrusion molding member 142.
  • first mold portion 1 12 and the second mold portion 1 This includes, but is not limited to, selection of materials for manufacturing the various components of the first mold portion 1 12 and the second mold portion 1 14, selection of dimensions of the various components of the first mold portion 1 12 and the second mold portion 1 14, making the molding surfaces of the various components of the first mold portion 1 12 and the second mold portion 1 14, placement of cooling channels and/or heating elements within the various components of the first mold portion 1 12 and the second mold portion 1 14, interfaces defined between the various components of the first mold portion 1 12 and the second mold portion 1 14 and other parts of the injection molding machine accommodating, in use, the mold 102 and the like.
  • implementatoinal details of the flip-top closure cap 104 can be varied and the embodiments of the mold 102 described herein can be applied for molding the flip-top closure cap 104 having a different design.

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  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne un moule d'injection (102) pour le moulage d'un capuchon de fermeture à sommet basculant (104) ayant une partie corps (106) et une partie sommet basculant (108) fixée à la partie de corps (106) par l'intermédiaire d'une charnière active (110). Le moule d'injection (102) comporte : une première partie de moule (112) pour définir une première partie du capuchon de fermeture à sommet basculant (104) ; une seconde partie de moule (114) pour définir une seconde partie du capuchon de fermeture à sommet basculant (104) ; la première partie de moule (112) comprend une partie de moule pivotante (134) configurée de façon à définir une partie de la première partie du capuchon de fermeture à sommet basculant (104), la partie de moule pivotante (134) étant configurée de façon à pouvoir tourner autour d'une première ligne centrale (190), qui est décalée dans l'espace par rapport à une ligne centrale d'articulation (192) de la charnière active (110), la rotation de la partie de moule pivotante (134) servant à effectuer, au cours d'une partie de démoulage d'un cycle d'opération de moulage du moule d'injection (102) : (a) une poussée du capuchon de fermeture à sommet basculant (104) vers la partie corps (106), et (b) un démoulage de la partie de sommet basculant (108) à partir d'au moins une partie de la première partie de moule (112).
PCT/EP2016/052525 2015-02-06 2016-02-05 Moule pour capuchon de fermeture à sommet basculant WO2016124749A1 (fr)

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US201562112819P 2015-02-06 2015-02-06
US62/112,819 2015-02-06

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108839303A (zh) * 2018-07-24 2018-11-20 广州市瑞高包装工业有限公司 一种新型合盖机
DE102019001725A1 (de) * 2019-03-13 2020-09-17 Braunform Gmbh Werkzeug zum Spritzgießen von Kunststoff-Formteilen und Verfahren zum Bewegen eines Schiebers einer Werkzeughälfte des Werkzeugs
EP3725487A1 (fr) * 2019-04-17 2020-10-21 Matrix, S.A. Moule d'injection et procédé de formation d'un capuchon de fermeture à sommet basculant à deux composants
CN114633442A (zh) * 2017-06-22 2022-06-17 佳能株式会社 制造设备、制造产品的方法及记录介质

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WO2004074129A1 (fr) 2003-02-20 2004-09-02 Gefit S.P.A. Dispositif d'obturation comprenant une partie capuchon articulee et procede et equipement permettant de produire ce dispositif
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114633442A (zh) * 2017-06-22 2022-06-17 佳能株式会社 制造设备、制造产品的方法及记录介质
CN108839303A (zh) * 2018-07-24 2018-11-20 广州市瑞高包装工业有限公司 一种新型合盖机
CN108839303B (zh) * 2018-07-24 2024-05-28 广州市瑞高包装工业有限公司 一种合盖机
DE102019001725A1 (de) * 2019-03-13 2020-09-17 Braunform Gmbh Werkzeug zum Spritzgießen von Kunststoff-Formteilen und Verfahren zum Bewegen eines Schiebers einer Werkzeughälfte des Werkzeugs
US11186019B2 (en) 2019-03-13 2021-11-30 Braunform Gmbh Tool for the injection molding of plastic molded parts and method for moving a slide of a tool half of the tool
DE102019001725B4 (de) 2019-03-13 2023-06-29 Braunform Gmbh Werkzeug zum spritzgiessen von kunststoff-formteilen und verfahren zum bewegen eines schiebers einer werkzeughälfte des werkzeugs, verfahren zum schwenken eines abschnitts eines in einem auswerferbauteil vorliegenden einteiligen kunststoff-formteils und verfahren zum gestalten einer formteil-kavität in einer werkzeughälfte während des spritzgiessens
EP3725487A1 (fr) * 2019-04-17 2020-10-21 Matrix, S.A. Moule d'injection et procédé de formation d'un capuchon de fermeture à sommet basculant à deux composants
WO2020212842A1 (fr) * 2019-04-17 2020-10-22 Matrix, S.A. Moule à injection et procédé de formation d'un bouchon de fermeture clipsé à deux composants

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