TWI554380B - A male mould element - Google Patents

Description

Male mode component

The present invention relates to a male mold element that can be used for injection or compression molding of an object constructed of a polymeric material. The male mould element according to the invention can be used in particular for shaping, for example, a lid of a container, or a preform of a container and in particular a preform of a bottle, or an inner surface of a hollow object of the container. The male mould element according to the invention can also be used in particular to form substantially flat objects, such as seals for container closures.

International Patent Application No. WO 2007/028702 discloses a male mold component for forming the interior of a container closure. The male mold element disclosed in WO 2007/028702 comprises a central opening and a tubular assembly disposed outside the central opening. A cooling circuit is formed in the central bore and in the tubular assembly such that a cooling fluid can flow from the central bore to the tubular fluid and thereby return to the central bore.

The cooling circuit disclosed in WO 2007/028702 has a very high efficiency because it allows the cooling fluid to be transferred into the central opening and into the tubular assembly close to the various surfaces forming the cover. However, the cooling circuit disclosed in WO 2007/028702 requires special techniques, such as the so-called "metal injection molding" (MIM), to constitute. In addition, due to the tubular assembly It is movable relative to the central aperture so that a sliding seal must be inserted between the tubular assembly and the central aperture, and the sliding seals wear quickly and must be replaced frequently.

German patent application DE 10022289 discloses a male mold element which reduces the disadvantages associated with sliding seals. In fact, the male mold element disclosed in DE 10022289 is characterized by a first cooling circuit for cooling one of the central holes for cooling a second cooling circuit surrounding one of the central holes, and Cooling a third cooling circuit surrounding the rotating assembly of the ejector. However, DE 10022289 does not provide detailed information on the configuration of the second cooling circuit and the third cooling circuit.

One of the objects of the present invention is to improve a male mold member for obtaining an object composed of a polymeric material by compression or injection molding.

Another object is to provide a male mold component having a high efficiency cooling system.

A further object is to provide a male mold element that can be effectively cooled while being manufactured and assembled in a simple manner.

A further object is to provide a male mold component that can effectively cool and reduce the rapid wear of such components.

In a first aspect of the present invention, a male mold component is provided, comprising a cooling circuit having a first via member formed on a first component of the male mold component, and in the male mold a second passage member formed on one of the second components of the component, the first passage member and the second passage member being distributed around a longitudinal axis of the male die member such that the first component Having a plurality of angular positions relative to the second component and wherein the first passage member is in fluid communication with the second passage member, wherein the second component is secured thereto by a removable connection The first component is such that the second component is mounted so as not to be rotatable relative to the first component when the male module component is operated.

Since the first passage member is in fluid communication with the second passage member at a plurality of angular positions of the first assembly relative to the second assembly, the second assembly can be mounted on the first assembly to ensure a cooling fluid The first component is passed to the second component or vice versa, and a timing system having the second component positioned at a predetermined angular position relative to the first component is not used.

This can, and in fact, be particularly easy to utilize the removable connection to separate the first component from the second component, for example, to perform a cleaning or repair operation, and then reassemble them together. After assembly, the first component and the second component act as a single component in the event that one component does not rotate relative to the other component.

In a second aspect of the present invention, a male mold member is provided that extends along a longitudinal axis, the male mold member including a cooling circuit having a first component formed on one of the male mold members a first passage member and a second passage member formed on a second component of the male mold member, wherein the first passage member and the second passage member are disposed to surround the longitudinal axis such that the A plurality of angular positions of the first component in fluid communication with the second passage member relative to the second component.

Due to the cooling circuit, the surface of the male mold member forming the desired object can be effectively cooled. Moreover, since the first passage member is in fluid communication with the second passage member at a plurality of angular positions of the first assembly relative to the second assembly, there is no need to provide a complicated timing system, or a particularly narrow geometric or dimensional tolerance. In order to ensure that the second component is always mounted at a predetermined angular position relative to the first component. This makes the male mold element according to the invention particularly easy to assemble.

The phrase "an angular position of the first component relative to the second component" means a position that can be theoretically defined when the first component and the second component are combined to obtain the male mode component. In detail, the aforementioned angular position may be defined by rotating the first component ring about the longitudinal axis relative to the second component. In other words, it is only the position of the first component relative to the angular position of the second component about the longitudinal axis.

The equiangular position can be defined, for example, when the operation of the male mold element is assembled.

This does not mean that the first component is rotatably mounted relative to the second component, i.e., the first component is rotatable relative to the second component when operating the male mold component, or vice versa.

However, in an embodiment, the second component rotates relative to the first component about the longitudinal axis and the first access member will be in fluid communication with the second access member.

In detail, although the second component is rotated relative to the first component about the longitudinal axis, the first passage member will face the second passage member.

In this manner, a cooling fluid circulating in the cooling circuit can be passed from the first passage member to the second passage member, or vice versa, but the second assembly is rotated relative to the first assembly about the longitudinal axis. .

In one embodiment, the first via member includes at least one first via and the second via member includes at least one second via, the first via and the second via being in the first component and the second component One of the interface regions has its own angular dimension. The angular extent of the first passage is greater than the angular dimension of the second passage. In this manner, even when the first component is rotated relative to the second component within certain limits, or vice versa, the second passage will remain facing the first passage along the full angular extent of the second passage. This does allow fluid communication between the first passage member and the second passage member in a plurality of relative angular positions of the first component and the second component.

In one embodiment, the first passage member includes at least one recess and the second passage member includes a plurality of passages, the distance between the two adjacent passages and the width of each passage such that the second assembly surrounds the longitudinal The shaft rotates relative to the first component, and at least one of the channels faces the at least one recess.

The first passage member and the second passage member thus assembled are particularly easy to implement because they can be obtained by simple milling or boring operations without relying on complicated techniques such as metal injection molding (MIM).

In one embodiment, in one configuration, the first component and the second component define a tubular forming member of the male mold component.

The cooling circuit is thus formed within the tubular forming member.

The male mold member may further comprise a centrally disposed core disposed within the tubular forming member.

In one embodiment, the male mold element further includes another cooling circuit for cooling the central forming core, the other cooling circuit being independent of the cooling circuit disposed in the tubular forming member.

This results in a male mold element that can be cooled in a particularly efficient manner because the cooling circuit and the other cooling circuit cool the peripheral and central regions of the formed object.

Furthermore, since the cooling circuit is independent of the other cooling circuit, it is not necessary to use a sliding seal even in the case where the central forming core and the tubular forming member are movable relative to each other. This can reduce the use of components that are subject to wear and thus simplify the maintenance of the male mold components.

In an embodiment, the first passage member faces the second passage member in an interface region of the second component in contact with the first component.

The interface region can extend around the longitudinal axis.

Alternatively, the interface region may be transverse to the longitudinal axis, in particular perpendicular to the longitudinal axis.

The first passage member can include a transfer recess and a return recess, and the second passage member can include a plurality of passages configured to surround the longitudinal axis.

In one embodiment, a pair of dividing surfaces are disposed between the transfer recess and the return recess, each of the separation surfaces being in contact with a surface portion of the second component to isolate the transfer recess and the return recess.

In detail, at least one of the plurality of channels faces the transfer recess, and at least one of the plurality of channels faces the return recess And at least one of the plurality of channels faces each of the separate surfaces.

The transfer recess and the return recess may be formed on an inner surface of the first component, and at least one of the plurality of channels may be formed on an outer surface of the second component.

The tubular forming member can include a third component that is coaxial with the second component.

In one embodiment, at least one of the plurality of channels continues along an area of the second component that protrudes from the first component, one side of the third component facing the channels in the area to close the Equal channels and define corresponding conduits.

The cooling circuit may include a communication conduit, and the communication conduit is preferably configured as an annular conduit, and communicates with the transmission recess and the return recess through at least one passage of the plurality of passages, and the communication conduit is disposed adjacent to the conduit Form the surface.

In detail, the communication conduit is defined between the second component and the third component.

In one embodiment, the male mold member further includes a moving means for creating a relative movement between the central forming core and the tubular forming member for separation between the central forming core and the tubular forming member. An undercut part.

In an embodiment, the second component is removably secured to the first component, particularly to the first component.

In a third aspect of the present invention, a method for forming an object male mold element for cooling one of a portion of the object is provided a loop, and another cooling circuit for cooling another portion of the object, and the other cooling circuit is independent of the cooling circuit, characterized in that the cooling circuit includes a loop conduit in which the male mold member An inlet passage member extending longitudinally to convey a cooling fluid into the annular conduit, extending longitudinally in the male mold member for withdrawing the outlet passage member of the cooling fluid from the annular conduit.

Thanks to this aspect of the invention, a male mold component that can be effectively cooled while being easily constructed and assembled is obtained.

The mutually independent cooling circuit and the other cooling circuit can in fact cool different portions of the formed object, even when the portions are formed by components of the male mold elements that are movable relative to one another.

The inlet passage member and the outlet passage member extending longitudinally in the male mold member can be formed by conventional mechanical tool cutting techniques and are not dependent on sophisticated techniques such as MIM technology.

Moreover, the annular catheter is relatively easy to construct as compared to complex spiral catheters that are foreseen in the prior art.

In an embodiment, the male mold member has a longitudinal axis.

The inlet passage member has an angular dimension of at least 10, and preferably greater than 30, along one of the arc measurements centered on the longitudinal axis.

Similarly, the outlet passage member has an angular dimension that is at least 10, and preferably greater than 30, along one of the arc measurements centered on the longitudinal axis.

In this manner, the inlet passage member and the outlet passage member ensure a sufficient flow of cooling fluid to cool the object formed by the male mold member.

In a fourth aspect of the present invention, a mold element for forming an object by molding a polymeric material is provided, comprising a cooling circuit for cooling the object, and wherein the mold element is further A heat pipe disposed between the object and the cooling circuit is included to remove heat from the object and transfer heat to the cooling circuit.

A heat pipe is a closed hollow member made of a heat conductive material, particularly a metal, and the inner portion thereof contains a portion of a refrigerant material in a liquid state and a portion in a gaseous state. The heat pipe can remove heat due to a change in the state of the liquid contained within the heat pipe.

When the liquid contained in the heat pipe is switched from the liquid state to the gaseous state, a considerable amount of heat is removed from the molded object. This heat is greater than the amount of heat that can be removed by heating a fluid only in the absence of a change in state.

In addition, since the heat pipe is hermetically sealed, the risk of fluid leakage occurring near the molded object is greatly reduced.

Also, once the appropriately shaped heat pipes have been prepared, they are very easy to assemble.

In an embodiment, a forming surface may be formed in the heat pipe to form a portion of the object.

This embodiment allows the object to be cooled in a particularly efficient manner because the heat pipe is placed in direct contact with the polymeric material that makes up the object.

In one embodiment, the male mold member includes a forming member adapted to be disposed between the heat pipe and the object

In this way, even when a person needs to form an object having a complicated shape, it is impossible to use a heat pipe when forming the heat pipe in accordance with the shape desired to be given to the object.

1, 60‧‧‧Molding unit

2. 202‧‧‧ male mode components

3, 403, 503 ‧ ‧ central formation core

4, 504, 604‧‧‧ tubular forming members

5. 505‧‧‧ objects

6, 106, 206, 306, 406‧‧‧ first component

7, 107, 207, 307, 407‧‧‧ second component

8‧‧‧ third component

9‧‧‧Abutment surface

10‧‧‧Another abutment surface

11‧‧‧Contact surface

12‧‧‧ shoulder

13, 413, 513 ‧ ‧ inlet catheter

15, 115, 215, 315, 415‧‧‧ transmission recess

16, 116, 216, 316, 416‧‧‧ return to the recess

17‧‧‧Separate surface

18, 418‧‧‧Export conduit

20, 120, 220, 320, 420, 620‧ ‧ channels

21‧‧‧Surface

22, 122, 222, 622‧‧ ‧ entrance access

23, 123, 223, 623‧ ‧ export routes

24‧‧‧Transport catheter

25‧‧‧Return catheter

26‧‧‧Expanded area

27, 427, 527, 627‧‧ ‧ ring catheter

28‧‧‧Sleeve components

29, 429, 529‧‧‧ inflow conduit

30, 430, 530‧‧‧ tubular components

31‧‧‧First coupling

32,432, 532‧‧‧ Outflow conduit

33‧‧‧Second coupling

34‧‧‧Support structure

35‧‧‧Separating components

36‧‧‧Mobile devices

37‧‧‧ cam

38‧‧‧Base wall; base

39‧‧‧ Sealing lip

40‧‧‧ side wall

41‧‧‧Threaded or other consolidation elements

42‧‧‧Additional access

43‧‧‧ tongue

44‧‧‧Edge area

45‧‧‧ starting catheter

46‧‧‧Connector

47‧‧‧ gap

48‧‧‧First seal ring

49‧‧‧Second seal ring

50‧‧‧ chamber

51‧‧‧ interface

61‧‧‧Female module components

62‧‧‧Formed end

63‧‧‧ end area

64‧‧‧Seal ring

70, 670‧‧‧ interface area

102, 302, 402, 502‧‧ ‧ male mode components

404‧‧‧Circular forming members

451‧‧‧First forming element

452‧‧‧Second forming element

453‧‧‧Ring chamber

506‧‧‧ components

607‧‧‧External components

606‧‧‧Connecting components

608‧‧‧ components

615‧‧‧ entrance

616‧‧‧Export

662‧‧‧ forming end

663‧‧‧Support

665‧‧‧Reference components

A, B‧‧‧ angular size; angle

C‧‧‧Ideal round hole

D‧‧‧diameter

L‧‧‧ length

P1, P2‧‧‧ position

X‧‧‧Closed line

Z, Z1, Z2, Z3‧‧‧ vertical axis

The invention may be better understood and implemented with reference to the drawings showing certain embodiments and not limiting the implementation thereof, wherein: Figure 1 is a longitudinal cross-sectional view showing a portion of a molding unit for making a cover; A longitudinal cross-sectional view taken along a plane rotated relative to the plane of FIG. 1 to show one of the male mold elements of the molding unit of FIG. 1; FIG. 3 is a cross-sectional view taken along plane III-III of FIG. 2; A cross-sectional view taken along plane IV-IV of Fig. 2 in a first position; Fig. 5 is a cross-sectional view similar to Fig. 4 in a second position; Fig. 6 is taken along plane VI-VI of Fig. 2. Figure 7 is a cross-sectional view taken along plane VII-VII of Figure 2; Figure 8 is an enlarged, cut-away cross-sectional view showing one of the molding ends of the molding unit of Figure 1; FIG. 10 is a cross-sectional view similar to FIG. 4 of one of the male mold elements according to still another embodiment; FIG. 11 is a schematic view of a male mold according to still another embodiment. A cross-sectional view similar to that of Figure 4; Figure 12 is a cross-sectional view similar to Figure 1 showing a portion of a molding unit for making a preform; Figure 13 is a cross-section similar to Figure 1 for forming a portion of a molding unit of the cover. Figure 14 is an enlarged cross-sectional view showing a heat pipe of a molding unit of Figure 13; Figure 15 is a schematic perspective view showing a partial cut of a portion of a male mold member according to another embodiment.

Figure 1 shows a portion of a molding unit 1 containing one of the male mold elements 2 that can also be seen in Figure 2.

The male element 2 can be used to obtain an object 5 of polymeric material by injection or compression molding. The object 5 can be a hollow object, such as, for example, a cover for one of the bottles or, more generally, a lid of a container. In this case, the male mold member 2 is engaged with a female mold member (not shown) included in the molding unit 1.

Alternatively, the object 5 can be a substantially flat object, such as a closure for a bottle cap or, more generally, a container closure. The seal can be mounted directly into the previously formed cover by the male mold member 2. In this case, the molding unit 1 includes an unillustrated support member for supporting the cover on the inner side where the seal must be formed, in place of a female mold member.

The molding unit 1 can be included in a molding apparatus, and the molding apparatus includes a plurality of molding units 1 that are identical to each other. If compression molding is used, the molding units 1 can be mounted in a peripheral region of a rotating rack, and the rotating rack can be rotated about a rotating shaft, such as a vertical axis. in case Using the injection molding method, the molding units 1 can mount a molding unit outside the other molding units according to a two-dimensional configuration.

As shown in FIG. 2, the male mold member 2 includes a core 3 extending along a longitudinal axis Z. In the illustrated example, the longitudinal axis Z is vertical, but in another embodiment, the longitudinal axis Z can also be horizontal or inclined. The central forming core 3 has a forming surface for contacting the polymeric material and forming an inner surface portion of the object 5, for example, to form a cover or a sealing base wall 38 therein, as shown in the figure. 8 is shown.

The male mold element 1 further comprises a tubular forming member 4 disposed within the central forming core 3, i.e., surrounding the central forming core 3.

The tubular forming member 4 similarly has a forming surface adapted to contact the polymeric material to form a surface portion of the object 5.

In detail, the central forming core 3 and the tubular forming member 4 cooperate to form a portion of the object 5 having an undercut. In the illustrated example, the portion of the object 5 having an undercut is a sealing lip 39, as shown in Figure 8, and the sealing lip 39 is projected from the base 38 so as to be in use with one of the necks of the container. An inner surface is joined. The sealing lip 39 allows the container to be sealed in a substantially airtight manner.

The central forming core 3 and the tubular forming member 4 are mounted in such a manner as to be movable relative to each other during a molding cycle. By moving the tubular forming member 4 relative to the central forming core 3, or vice versa, the portion of the object 5 having an undercut, i.e., the sealing lip 39, can be separated from the male mold member 2. The tubular forming member 4 includes a cooling circuit, and a cooling fluid can be circulated in the cooling circuit to be cooled by the tubular forming member 4 The parts of the object 5. The cooling fluid can be a liquid or a gas.

The cooling circuit associated with the tubular forming member 4 is partially defined between the first component 6 and a second component 7 of the tubular forming member 4.

The first component 6 formed as a sleeve is arranged to form the core 3 around the center in a region farther away from the region where the core 3 is formed.

The second component 7 which is hollow on the inside and which is open at both ends is arranged to form the core 3 around the center in a region closer to the region where the core 3 is formed in the center. The second component 7 is secured to the first component 6 by a removable connection, such as a screw connection.

The second component 7 has an undercut portion for forming the object 5, in particular, a forming end of the sealing lip 39. A consolidating end of the second component 7 opposite the forming end is secured to the first component 6.

In detail, the confining end of the second component 7 is inserted into the first component 6 such that a portion of the length of the second component 7 is located within the first component 6. The second component 7 projects outwardly from the first component 6 for the remainder of its length. The tubular forming member 4 can further comprise a third component 8 and the third component 8 is arranged to interact with the polymeric material and internally form a side wall 40 of the object 5. If the object 5 is covered, as shown in Figure 8, the side wall 40 can include a plurality of consolidation elements 41, such as threaded portions or projections, to allow the cover to be affixed to a container.

As shown in FIG. 2, the third component 8 has an abutment surface 9, and The abutment surface 9 is adapted to abut against the other abutment surface 10 formed on the first component 6. The abutment surface 9 is formed at one end of the central forming core 3, and the end portion of the central forming core 3 is opposed to the other end of the third component 8 assembled to interact with the polymeric material.

On the third component 8, in particular in the third component 8, a contact surface 11 is formed, and a shoulder 12 formed on the second component 7 can abut against the contact surface 11.

When the second component 7 is affixed to the first component 6, the third component 8 is disposed within the second component 7 and is compressed between the first component 6 and the second component 7. On the other hand, if the second component 7 is separated from the first component 6, the third component 8 will also be removed.

The components of the tubular forming member 4 are thus removably connected to each other. This makes it particularly simple to disassemble the tubular forming member 4 into its individual components. Therefore, if necessary, only one of the tubular forming members 4 can be replaced, and the other two components can be used. Furthermore, the operation of cleaning the cooling circuit associated with the tubular forming member 4 is simplified.

If the object 5 to be formed is a seal, the third component 8 may be omitted or it may not have a surface formed.

The cooling circuit formed in the tubular forming member 4 may include an inlet conduit 13 for connecting the first assembly 6 with an unillustrated source of cooling fluid. For example, the inlet conduit 13 extends into the thickness of the first component 6 along a direction parallel to the longitudinal axis Z. The inlet conduit 13 can be coupled to the source of cooling fluid by attachment to, for example, a flexible tube, one of the inlet couplings not shown.

The cooling circuit includes a first passage member formed in the first assembly 6 to fluidly communicate the source of cooling fluid with the second assembly 7. The first passage member may be formed on an inner surface of the first component 6 in a region of the first component 6, and the region of the first component 6 internally houses a portion of the second component 7 Share.

The first passage member includes a transfer recess 15 for receiving, for example, a cooling fluid from the source through the inlet conduit 13 and delivering the cooling fluid to the second assembly 7.

In order to understand how the transfer recess 15 is constructed, it is conceivable to define a desired circular hole C on the inside of the first component 6 as indicated by a broken line in FIG. It is conceivable that the transfer recess 15 is obtained by further removing material from one of the ideal circular holes C. In other words, the transfer recess 15 penetrates the thickness of the first component 6 with respect to the ideal circular hole C. The transfer recess 15 extends in a direction parallel to the longitudinal axis Z.

The first passage member further includes a return recess 16 formed in the first assembly 6. In the illustrated example, the transfer recess 15 and the return recess 16 are diametrically opposed to each other. However, the return recess 16 can also be disposed at a position that is not diametrically opposed to the transfer recess 15, for example at 90 or 120.

The return recess 16 is for collecting the cooling fluid after the cooling fluid has cooled the portions of the object 5 formed by the tubular forming member 4. The return recess 16 extends in a direction parallel to the longitudinal axis Z.

The return recess 16 can be similarly conceived as being obtained by removing material from a portion of the ideal circular aperture C shown by the dashed line in FIG. 4 such that the return recess 16 penetrates the first component relative to the aforementioned circular aperture. 6 thickness.

As shown in FIG. 4, on the first assembly 6, disposed between the transfer recess 15 and the return recess 16 is a separating surface 17 engageable with an outer surface of the second component 7 to separate the transfer recess 15 and the return recess 16. The dividing surfaces 17 can be formed as part of a cylindrical surface.

An outlet conduit 18 is in communication with the return recess 16. The outlet conduit 18 is formed with the thickness of the first component 6. The outlet conduit 18 allows the cooling fluid to be removed from the tubular forming member 4. To this end, an outlet coupling member can be coupled to the outlet conduit 18 and a flexible tube can be attached to the coupling member.

The cooling circuit disposed in the tubular forming member 4 further includes a second passage member formed on the second assembly 7. The second passage member can include a plurality of passages 20 disposed about an outer surface of the second assembly 7 about the longitudinal axis Z. The outer surface forming the channels 20 at least partially faces the inner surface of the first component 6 forming the transfer recess 15 and the return recess 16.

Each channel 20 can extend in a direction parallel to the longitudinal axis Z. Each channel 20 can be configured as a trench, particularly a linear trench.

The channels 20 allow the cooling fluid from the first component 6 to be transferred to the object 5 that must be cooled and the cooling fluid of the cooled object 5 to be transferred to the first component 6.

The channels 20 interact with the transfer recess 15 and the return recess 16 in an interface region 70 defined between the first component 6 and the second component 7. The interface region 70 extends around the longitudinal axis Z by a predetermined length L, as shown in FIG.

The channels 20 can be configured to surround the longitudinal axis Z in an equidistant manner.

The channels 20 are configured to surround the longitudinal axis Z in a manner that defines a plurality of angular portions of the second component 7 relative to the first component 6, wherein at least one of the channels 20 will be in fluid communication with the transfer recess 15 At the same time, at least the other passage 20 will be in fluid communication with the return recess 16. In other words, if, for example, the second component 7 is rotated relative to the first component 6 about the longitudinal axis Z during assembly, the second component 7 can be disposed at a plurality of angular positions, and at each angular position, at least one channel 20 faces the transfer recess 15 and at least the other channel 20 faces the return recess 16.

This can be achieved, for example, by appropriately selecting the width of the channels 20, i.e., the dimensions of the channels 20 perpendicular to the longitudinal axis Z, and the dimensions between the two adjacent channels 20.

In the illustrated embodiment, as shown in Figure 5, each channel 20 has an angular dimension A measured around the longitudinal axis Z, i.e., it is facing an angle A. The transfer recess 15 and the return recess 16 each have an angular dimension B measured around the longitudinal axis Z, i.e., opposite each other. The equiangular dimensions A and B are calculated in the interface region 70 between the first component 6 and the second component 7 of the channel 20 facing the transfer recess 15 and the return recess 16.

The angular dimension A of each channel 20 is smaller than the angular dimension B of the transfer recess 15 and the return recess 16. This ensures that, for example, when assembled, the second assembly 7 is rotated relative to the first assembly 6, at least one passage 20 can face the transfer recess 15 along its entire angular dimension A. This also applies to the return recess 16 as well.

In the example of FIG. 4, regardless of the angular position of the second component 7 relative to the first component 6 (ie, although the second component 7 is rotated relative to the first component 6 about the longitudinal axis Z), at least one The passage 20 will be in fluid communication with the transfer recess 15 such that the cooling fluid can pass into the at least one passage 20 from the transfer recess 15. Additionally, at least one passage 20 will be in fluid communication with the return recess 16 such that the cooling fluid passes from the passage 20 into the return recess 16.

Due to the width of the channels 20, i.e., the dimensions of the channels 20 perpendicular to the longitudinal axis Z, and the distance between the two adjacent channels 20, in the example of Figure 4, in fact, the second When the assembly 7 is partially inserted into the first assembly 6, although the second assembly 7 is rotatable, at least one passage 20 will face the transfer recess 15 and at least one passage 20 will face the return recess 16.

A similar result can be obtained by acting on the width, number and distance of the recesses provided on the first component 6. In other words, instead of having only one transfer recess 15 and only one return recess 16, the first component 6 can have a plurality of transfer recesses and a plurality of return recesses.

The second component 7 is defined along a portion of the inside of the first component 6 to be inserted by a cylindrical side surface having a diameter D. The channels 20 penetrate into the cylindrical side surface of the second component 7. Therefore, the two continuous passages 20 are separated by a surface portion 21, and in the illustrated example, the surface portion 21 is a cylindrical surface portion.

For the first component 6, the diameter D can be equal to the diameter of the ideal circular hole C as indicated by a broken line in FIG. In other words, the second component 7 The diameter D of the cylindrical side surface may be equal to the diameter of the ideal cylindrical portion defined by the dividing surface 17 formed on the first component 6.

In this manner, the dividing surfaces 17 serve as guiding surfaces for guiding the second component 7 when the second component 7 is partially inserted into the first component 6. The separating surfaces 17 also rotate relative to the first assembly 6 about the longitudinal axis Z of the second component 7, for example, to be screwed onto or removed from the first component 6 as a guiding surface .

Even if there is a small looseness or a slight interference between the diameter D and the diameter of the ideal circular hole C, the cooling circuit can function with an acceptable efficiency.

The dividing surfaces 17 and the surface portions 21 may be sized such that regardless of the angular position of the second component 7 relative to the first component 6 (i.e., although the second component 7 is circumferentially aligned relative to the longitudinal axis Z) The first component 6 is rotated, and at least one surface portion 21 of the second component 7 engages or contacts a separate surface 17 of the first component 6.

The surface portions 21 in contact with the divided surfaces 17 separate the transfer recess 15 from the return recess 16, i.e., they prevent the cooling fluid from reaching the forming end of one of the tubular forming members 4, by the transfer recess 15 Directly to the return recess 16, or vice versa.

In this manner, between the first component 6 and the second component 7, the separate surfaces 17 define one of the inlet passages 22 and one of the outlet passages 23 shown in FIGS. 4 and 5.

The inlet passage 22 is in communication with the inlet conduit 13 and the outlet passage 23 is in communication with the outlet conduit 18.

The inlet passage 22 is defined between the transfer recess 15 and certain passages 20, and the outlet passage 23 is defined between the return recess 16 and the other passage 20.

In the illustrated example, twenty-eight channels 20 are formed on the second component 7. 4 and 5 show the two end positions of the second component 7 relative to the first component 6.

In the position shown in FIG. 4, seven passages 20 are in communication with the transfer recess 15, and the other seven passages 20 are in communication with the return recess 16. Furthermore, the seven channels 20 are completely facing the respective separating surfaces 17 of the first component 6. This position corresponds to the maximum number of channels 20 that are in communication with the transfer recess 15 and the return recess 16, respectively.

In the position shown in FIG. 5, the six passages 20 are in communication with the transfer recess 15 and the six passages 20 are in communication with the return recess 16. There are eight channels 20 that are inactive at this location facing the respective separation surfaces 17 of the first component 6. The position shown in FIG. 5 corresponds to the minimum number of passages 20 that communicate with the transfer recess 15 and the return recess 16, respectively.

Depending on how the second component 7 is mounted relative to the first component 6, the second component 7 can also be disposed at other intermediate positions between the position shown in FIG. 4 and the position shown in FIG. However, at all of these intermediate positions, there are channels 20 that communicate with the transfer recess 15 and other passages that communicate with the return recess 16. The other channels 20 are additionally facing the separate surfaces 17.

In general, the number of channels 20 facing each of the separate surfaces 17 will depend not only on the relative position of the first component 6 and the second component 7, but also on the dimensions of the channels 20 on the second component 7 and Configuration.

It has been confirmed that when the first passage member and the second passage member are sized and arranged such that at least one passage 20 faces the entire angular extent of each of the dividing surfaces 17, that is, both surface portions 21 defining them are in contact with a separating surface 17. The effectiveness of cooling is higher. If the above conditions are met, the inlet passage 22 will be isolated from the outlet passage 23 by at least one passage 20 on both sides of the inlet passage 22 and the outlet passage 23. Therefore, leakage of cooling fluid between the inlet passage 22 and the outlet passage 23 is minimized. This will prevent the cooling fluid that is advancing toward the object 5 from being heated prematurely due to mixing with the cooling fluid that has returned after cooling the object 5.

However, the above conditions are not important because, although relatively inefficient, even if only one of the surfaces 21 contacts a separate surface 17, such that there is no channel 20 that faces the separation surface 17, the cooling circuit cools the object. 5.

The channels 20 extend not only along a portion of the second component 7 disposed within the first component 6, but also along another of the second components 7 projecting from the first component 6 and parallel to the longitudinal axis Z Some continue to extend. In this other part, the inner wall of one of the third components 8 faces the channels 20. The inner wall of the third component 8 encloses the channels 20 to define corresponding conduits. In detail, between the second component 7 and the third component 8, a set of delivery conduits 24 are defined in communication with the inlet passage 22. The passages 20, in turn, between the second component 7 and the third component 8, further define a set of return conduits 25 that communicate with the outlet passage 23.

Near the formation end of one of the second components 7, the second component 7 has an enlarged region 26, and the enlarged region 26 is bounded by the shoulder 12 set.

The channels 20 communicate with the additional channels 42 formed in the enlarged region 26 of the second component 7 as shown in FIG. Due to the additional passages 42, between the second assembly 7 and the third assembly 8, in the enlarged region 26, the transfer conduits 24 and the return conduits 25 continue to be defined such that the cooling fluid may be in close proximity The ground reaches the polymeric material to be formed.

The transfer conduits 24 extend into an annular conduit 27 as shown in FIG. 7, and the annular conduit 27 extends around the longitudinal axis Z in an interface region between the second component 7 and the third component 8. In order to also intercept the return ducts 25. The annular conduit 27 thus serves as a communication conduit for communicating the delivery conduit 24 with the return conduits 25.

The annular duct 27 extends along a particularly circular closed line X, and the closed line X is disposed in a plane perpendicular to the longitudinal axis Z. The annular duct 27 is disposed near one of the forming ends of the tubular forming member 4 as close as possible to the surface of the tubular forming member 4 for interacting with the polymeric material to be formed.

In the illustrated embodiment, the inlet conduit 13, the inlet passage 22, the transfer conduits 24, the annular conduit 27, the return conduits 25, the outlet passages 23, and the outlet conduits 18 define the tubular forming member 4. Cooling circuit.

The male mold element 2 further comprises another cooling circuit formed in the central forming core 3 for cooling the region of the object 5 formed by the central forming core 3. As shown in FIG. 2, a longitudinal bore is formed in the central forming core 3 at a position coaxial with the longitudinal axis Z. a tubular member 30 is inserted into this Inside the longitudinal hole. An inflow conduit 29 is defined within the tubular member 30 for conveying a cooling fluid into the central forming core 3. The inflow conduit 29 can be coupled to a source of cooling fluid by attaching a tube (not shown) to one of the first coupling members 31 shown in FIG.

An outflow conduit 32 is formed in a gap between the tubular member 30 and the central forming core 3. Through the outflow conduit 32, the cooling fluid can exit the center to form the core 3 after the object 5 has been cooled.

In detail, the outlet conduit 32 can be coupled to an unillustrated outlet tube by a second coupling member 33 as shown in FIG.

Therefore, the cooling circuit formed in the tubular forming member 4 is independent of another cooling circuit formed in the central forming core 3, that is, the two cooling circuits are not in the tubular forming member 4 or in the central forming core 3 Connected.

The male mold element 2 can further comprise a sleeve member 28 disposed around the third assembly 8. If the object 5 is a cover of a container, the sleeve member 28 can have a forming surface, and the forming surface is adapted to contact the polymeric material to form one of the cover rings with the third component 8 Or a plurality of tongues 43, as shown in FIG.

As shown in FIG. 1, the central forming core 3 is fixed to a support structure 34 of the molding unit 1.

The molding unit 1 further comprises a separating element 35, and the separating element 35 can interact with an edge region 44 of the object 5 shown in Fig. 8 to remove the object 5 from the male mold element 2. The separating element 35 can be operated by a moving device 36, and the moving device 36 can include, for example, a cam 37. The moving device 36 can be assembled to move the separating element 35 in a direction parallel to the longitudinal axis Z, and the separating element 35 does not rotate about the longitudinal axis Z.

The male mold element 2 further comprises a transfer member for transferring a pressurized fluid, in particular a gas, such as compressed air, between the object 5 and the surface of the male mold member 2 interacting with the object 5. The transfer member can be assembled to convey the pressurized fluid to the base wall 38 of the object 5, particularly at the location of the seal lip 39.

As shown in Figure 1, the transfer member includes a starting conduit 45, and the starting conduit 45 is formed, for example, in the first assembly 6 in a direction that is oblique relative to the longitudinal axis Z. A connector 46 can be coupled to the connector 46 for connecting the starting conduit 45 and a feed tube for the pressurized fluid not shown in FIG. The starting conduit 45 extends into an area of the first component 6 for receiving the second component 7. When the male mold member 2 is disposed in an assembled configuration, the starting conduit 45 communicates with a gap 47 defined between the second assembly 7 and the central forming core 3.

A first seal ring 48 is disposed between the first component 6 and the central forming core 3 and in an end region of the first component 6 remote from the object 5. A second seal ring 49 is disposed between the first component 6 and the second component 7 and is closer to the first component 6 of the object 5 than at the end region of the first seal ring 48. In a region. The first seal ring 48 and the second seal ring 49 significantly limit, or even prevent, the pressurized fluid from leaking outwardly from the first component 6.

The gap 47 communicates with a chamber 50 defined between the enlarged region 26 of the second component 7 and the formed end of the central forming core 3. By the chamber 50. The pressurized fluid exits at an interface 51 defined between one of the central forming core 3 and the second component 7 as seen in FIG. 8 to act on the object 5. The pressurized fluid thus assists in the separation of the object 5 from the male mold element 2.

In operation, the polymeric material is formed between the male mold member 2 and the unillustrated female member, or if a seal is directly molded into a cover, the male mold member 2 is formed Between the container lids.

The cooling fluid enters the tubular forming member 4 through the inlet conduit 13. Thereby, the cooling fluid flows into the transfer recess 15. Through the passage 20 facing the transfer recess 15, the cooling fluid passes into the transfer conduit 24 and thereby reaches the annular conduit 27. Due to the annular conduit 27, the cooling fluid circulates around the second component 7 and then moves past the return conduits 25 away from the forming end. The cooling fluid thus cools the undercut portion, particularly the sealing lip 39, and if the object 5 is a cover, also cools the side wall 40 of the cover and the threaded or other consolidation elements 41 formed thereon.

Since the passages 20 face the return recess 16, the cooling fluid reaches the outlet passage 23 by the return conduits 25. Thereby, the cooling fluid exits the tubular forming member 4 through the outlet conduit 18.

In addition, a cooling fluid enters the inflow conduit 29 of the central forming core 3 by the first coupling member 31. Through the inflow conduit 29, the cooling fluid reaches near the formation surface of the central forming core 3 to cool a portion of the object 5, such as the cover or the base wall 38 of the seal. The cooling fluid then passes into the outflow conduit 32 and exits the central forming core 3 through the second coupling member 33.

When the object 5 is sufficiently cooled, an unillustrated actuator The master member and the male member 2 are moved relative to each other to open the mold. If the object 5 is a cover, the cover is still coupled to the male mold element 2 due to the thread or other consolidation element 41 that engages the male mold element 2.

The moving device 36 moves the separating element 35 acting on one of the edge regions 44 of the cover, exerting a force on the edge region 44 for removing the cover by the male mold member 2, i.e., facing the female The force of the mold element. Since the cover is engaged with the male mold member 2 by a thread or other reinforcing member 41, the cover pulls the tubular forming member integrally moved with the cover at a portion of the beginning of the stroke of the separating member 35 4. For example, compressing an elastic element such as a spring. The central forming core 3 remains stationary as it is secured to the support structure 34. The sealing lip 39 of the cover can thus be separated from the central forming core 3 and then deformed towards the inside of the cover until it is itself also separated from the tubular forming member 4.

Therefore, the moving device 36 can generate a relative movement between the central forming core 3 and the tubular forming member 4, so that the sealing lip 39 of the cover, that is, the undercut portion of the object 5 can be associated with the male mold member 2. separate.

The pressurized fluid from the starting conduit 45 and transmitted to the vicinity of the sealing lip 39 helps the sealing lip 39 to be separated by the second component 7 and forces the object 5 to expand, so that the object 5 can be more easily removed from the male mold Element 2 is removed.

The cooling circuit associated with the tubular forming member 4 and another cooling circuit associated with the central forming core 3 also effectively cools the components associated therewith as the tubular forming member 4 moves relative to the central forming core 3. If the flexible tube is connected to the inlet duct 13 and the outlet duct 18, even when the tubular forming member 4 moves relative to the central forming core 3 The cooling fluid can also enter and exit the cooling circuit disposed in the tubular forming member 4.

Due to the provision of two separate cooling circuits, a sliding seal disposed between the tubular forming member 4 and the central forming core 3 must be used to prevent leakage of the cooling fluid as the tubular forming member 4 moves relative to the central forming core 3. Therefore, the life of the male mold member 2 is lengthened and the maintenance thereof is simplified.

After the cover pushed by the separating member 35 has moved along a predetermined moving path, for example, the tubular forming member 4 is stopped due to a mechanical limit switch.

The separating element 35 continues to move and pushes the cover against the master element. Therefore, the side wall of the cover is deformed and the cover is separated from the tubular forming member 4. At this point, the cover can be collected and removed by an unillustrated removal device.

The cooling circuit associated with the tubular forming member 4 can be realized in a particularly simple manner using a conventional boring and milling operation. Moreover, the tubular forming member 4 can be quickly assembled without the use of a complex timing system to ensure that the second component 7 is always in a predetermined angular position relative to the first component 6. Although the second component 7 rotates relative to the first component 6 about the longitudinal axis Z, the cooling circuit formed in the tubular forming member 4 actually functions correctly.

Figure 9 shows a cross-sectional view of a male mold component 102 in accordance with another embodiment. The male mold member 102 includes a first component 106 having a first passage member, and the first passage member has a transfer recess 15 similar to the male mold member 2 shown in FIGS. 1 through 8 and a transfer recess portion of the return recess portion 16. 115 and a return recess 116. The male mode component 102 further includes functions similar to those shown in Figures 1-8. A second component 107 of the second component 7 of the male module component 2. The second component 107 has a second passage member that includes a plurality of passages 120.

The main difference between the male mold member 102 shown in FIG. 9 and the male mold member 2 shown in FIGS. 1 through 8 includes the fact that the passages 120 facely communicate with the transfer recess 115 and the return recess 116. In other words, the channels 120 face an interface region that is transverse to the longitudinal axis Z, particularly one of the vertical planes, facing the transfer recess 115 and the return recess 116. Conversely, in the embodiment of Figures 1 to 8, the interface region between the male mold elements 2 and the recesses 15, 16 has a cylindrical configuration.

The second component 107 can have a tubular configuration, in which case the channels 120 are formed on an inner surface of the second component 107. The first component 106 and the second component 107 are sequentially disposed along the longitudinal axis Z. A tubular assembly 100 can be disposed within the first component 106 and the second component 107 to radially close the transfer recess 115, the return recess 116, and the channels 120.

In the case of the male mold member 102, a plurality of angular positions in which the first passage member formed on the first assembly 106 and the second passage member formed on the second member 107 are in fluid communication may be defined. In detail, regardless of the angular position of the second component 107 relative to the first component 106, at least one channel 120 faces the transfer recess 115 and at least one other channel 120 faces the return recess 116.

The passage 120 in communication with the transfer recess 115 defines a plurality of inlet passages 122 that extend into an annular conduit that is substantially similar to the annular conduit 27 shown in FIG. The channels 120 in communication with the return recess 116 are defined The number of outlet passages 123 are communicated with the annular conduit to remove the cooling fluid therefrom.

One or more of the channels 120, shown in phantom in FIG. 9, may also face portions of the first component 106 that separate the transfer recess 115 from the return recess 116. The channels separate the transfer recess 115 from the return recess 116.

10 shows a cross-sectional view of a male mold member 202 including a tubular forming member, and the tubular forming member includes a first component 206 and a second component 207, the second Component 207 is partially inserted into first component 206. The male mold member 202 shown in FIG. 10 is different from the male mold member 2 shown in FIGS. 1 to 8, mainly because it has the transfer concave portion, the return concave portion, and the like as compared with the male mold member 2 shown in FIGS. An inversion of the position of the equal channel.

In detail, on the first component 206 of the male mold component 202, a plurality of channels 220 extending longitudinally around the longitudinal axis Z are formed. The channels 220 are obtained on an inner surface of one of the first components 6.

The second component 207 has a transfer recess 215 and a return recess 216, and the transfer recess 215 and the return recess 216 are formed on an outer surface of the second component 207 that is adapted to be inserted into the first component 206. The transfer recess 215 and the return recess 216 may be diametrically opposed. The transfer recess 215 and the return recess 216 each have an angular dimension that is measured about the longitudinal axis of the male mold member 202 and that is greater than the angular extent of each channel 220. In this manner, it can be defined that at least one channel 220 will communicate with the transfer recess 215 and at least one channel 220 will communicate with the second component 207 of the return recess 216. At most angular positions of the first component 206.

In detail, since the channels 220 are evenly disposed to surround the longitudinal axis, at least one channel 220 faces the transfer recess 215 regardless of the angular position of the first component 206 relative to the second component 207. And at least one channel 220 faces the return recess 216.

The passage or plurality of passages 220 facing the transfer recess 215 define an inlet passage 222. The channels 220 also continue to extend along a portion of the second component 207 that protrudes from the first component 206. The channels 220 are here closed, for example, by a third component disposed to surround the second component 207. The channels 220 extend into an annular conduit similar to the annular conduit 27 of Figure 7, such that the inlet passage 222 is configured to communicate with the annular conduit.

Similarly, the passage or plurality of passages 220 facing the return recess 216 define an outlet passage 223 that similarly communicates the annular conduit.

Figure 11 shows a male mode component 302 in accordance with another embodiment. The male mold component 302 includes a first component 306 and a second component 307 that is at least partially inserted into the first component 306.

Formed on the second component 307 can be disposed on the second component 307, for example, one of the diametrically opposed positions of the transfer recess 315 and a return recess 316. The transfer recess 315 and the return recess 316 extend parallel to the longitudinal axis of the male mold element 302.

A pair of channels 320 are formed in the first component 306; they are, for example, disposed diametrically opposite and parallel to the longitudinal axis of the male mold member 302.

The channels 320 are formed in one of the first components 306 The inner surface is in contact with the outer surface of the second component 307, and the transfer recess 315 and the return recess 316 are formed in contact with the outer surface of the second component 307.

Each channel 320 has an angular dimension that is measured about the longitudinal axis of the male mold element 302 and that is smaller than the angular dimension B of the return recess 316 and the return recess 316. For example, the angular dimension B may be three to four times larger than the angular dimension A.

In this manner, there will be a plurality of angular positions at which the transfer recess 315 will communicate with the passage 320 and the return recess 316 will communicate with the passage 320 relative to the second component 307. In Fig. 11, for example, one of the positions has been displayed in a solid line and two of the positions shown as P1 and P2 are shown by a broken line.

The second component 307 is removably mounted on the first component 306. For example, the second component 307 can be threaded onto the first component 306. To ensure that when the first component 306 is locked to the second component 307, the transfer recess 315 will face a channel 320 and the return recess 316 will face the other channel 320, the pair being formed in the first component 306. And the starting point of the thread on the second component 307 provides a relatively wide tolerance, for example about 30° is sufficient. In fact, since there is a plurality of angular positions in which the first passage member, that is, the passage member 320 and the second passage member, that is, the transfer recess portion 315 and the return recess portion 316 are in fluid communication, a comparison is made even for the starting point of each thread. To the wide tolerance, the cooling fluid may also pass from the first component 306 to the second component 307, or vice versa.

Thus Figure 11 provides that the first access member will not be associated with the second pass The path member is in fluid communication with one instance, but the second member 307 is rotated relative to the first member 306. However, the channels 320 and recesses 315, 316 are sized to communicate because of the cutting tolerances that can be easily achieved without relying on complex timing systems.

Figure 12 shows a male mold element 402 in accordance with another embodiment.

Although the male mold members 2 shown in Figs. 1 and 2 are assembled to form a cover for a container, the male mold members 402 shown in Fig. 12 are assembled by injection or compression for molding. In a container, in particular a preform of a bottle. The preforms obtained by the male mold element 402 can then be converted into containers, particularly bottles, by blow molding or stretch blow molding.

The male mold member 402 is included in a molding unit that also includes an unillustrated female mold member, and the female mold member is adapted to externally form the preform. The molding unit further includes at least two moving inserts for externally forming a neck of one of the preforms having an undercut region. The moving inserts define a separate neck mold.

The male mold element 402 includes a central forming core 403 suitable for forming the preform.

In the illustrated example, the central forming core 403 includes a first forming element 451, and the first forming element 451 is adapted to internally form a bottom of one of the preforms and a sidewall of the preform that is closer to the bottom. a part. The central forming core 403 further includes a second forming element 452, and the second forming element 452 is adapted to internally form a portion of the sidewall of the preform that is further from the bottom. The second forming element 452 is attached to the first forming element 451.

In another embodiment, the central forming core 403 can be made in a single piece.

The male mold member 402 further includes an annular forming member 404 adapted to form one of the annular edges of the preform, and the annular edge of the preform is delimited by a portion opposite the bottom of the preform itself.

The annular forming member 404 forms a core 403 around the center. The latter protrudes from the annular forming member 404 to a female mold element (not shown).

The annular forming member 404 and the central forming core 403 can be used when the male mold member 402 is operated, particularly when the mold is closed to form the preform, and when the preform must be removed from the mold Relative movement.

The male mold component 402 includes a first component 406 and the first component 406 extends along a longitudinal axis Z1.

The male mold component 402 further includes a second component 407 coupled to the first component 406. The second component 407 can be mounted to the first component 406 by a removable connection, for example, by a screw. In the illustrated example, the second component 407 is directly threaded onto the 408.

The central forming core 403 can be supported by the first component 406, such as screwed onto the first component 406.

The second component 407 extends partially within the first component 406 and a portion extends within the central forming core 403.

In the male mold element 402, a cooling circuit is formed which is in a liquid or gaseous state in which a cooling fluid can be circulated to cool the preform.

The cooling circuit can include an inlet conduit 413 formed in the first component 406. The inlet conduit 413 can extend at least partially along a direction parallel to the longitudinal axis Z1.

The cooling circuit can further include an outlet conduit 418 that is similarly formed in the first component 406. The outlet conduit 418 can extend, for example, at a position diametrically opposite the inlet conduit 413 at least partially in a direction parallel to the longitudinal axis Z1.

On the first component 406, a first passage member for the cooling fluid is formed. The first passage member can include a transfer recess 415 and a return recess 416 disposed on an inner surface of one of the first components 406. In detail, the first passage member may be formed at one end of the first component 406 inserted in one end region of the second component 407.

The inlet conduit 413 extends into the transfer recess 415 and the outlet conduit 418 exits the return recess 416.

On the second component 407, a second passage member is formed, and the second passage member can include a plurality of passages 420 disposed on the second assembly 407. The channels 420 can extend parallel to the longitudinal axis Z1 and can be uniformly configured to surround the longitudinal axis Z1.

The channels 420 extend into end regions of the second component 407 that are inserted into the first component 406 such that they can face the transfer recess 415 or the return recess 416. In addition, the channels 420 continue into the portion of the second component 407 that protrudes from the first component 406 toward the preform to be formed. In this portion, the channels 20 are radially closed by the central forming core 403.

The first passage member and the second passage member are configured to surround the longitudinal axis Z1 such that, around the longitudinal axis Z1, the second component 407 that the first passage member will be in fluid communication with the second passage member can be defined A majority of angular positions relative to the first component 406. To this end, the transfer recess 415, the return recess 416, and the channel 420 can have any of the configurations shown in Figures 4 and 5 and 9 through 11.

In detail, the first passage member and the second passage member may be assembled such that, although the second assembly 407 is angularly positioned relative to the first assembly 406, at least one passage 420 will always face the Return to the recess 416. In this manner, although the second component 407 is mounted on the first component 406, the cooling circuit will still function effectively. Therefore, it is not necessary to use a complicated timing system.

The cooling circuit further includes an annular conduit 427 extending around the longitudinal axis Z1. One of the intermediate lines of the annular conduit 427 extends in a plane transverse to the longitudinal axis Z1, particularly in a vertical plane. The annular conduit 427 can be defined between the second component 407 and the central forming core 403.

The channel 420 extends along the outer surface of the second component 407 until it reaches the annular conduit 427.

The cooling fluid enters the male mold element 2 through the inlet conduit 413 and thereby it opens into the transfer recess 415. The cooling fluid then reaches the annular conduit 427 through the passage 420 facing the transfer recess 415. Thus, the cooling fluid opens into a passage 420 that communicates with the return recess 416, which then exits the male mold member 402 through the outlet conduit 418.

The annular duct 427 is disposed to form one of the preforms The center of the open end forms near the surface of one of the cores 403. The annular conduit 427 is therefore used to cool the neck of the preform.

The male mold element 402 further includes another cooling circuit for cooling the bottom of the preform. The further cooling circuit is also used to cool the sidewall of the preform, i.e., the portion of the preform disposed between the neck and the bottom.

The other cooling circuit includes an inflow conduit 429, and the inflow conduit 429 extends along the longitudinal axis Z1 within a tubular member 430 that is coaxial with the first component 406. The inflow conduit 429 continues to extend within the central forming core 403 and terminates adjacent a portion of the central forming core 403 that forms the bottom of the preform.

An annular chamber 453 is defined within the central forming core 403 such that cooling fluid from the inflow conduit 429 can cool the sidewall of the preform. From the annular chamber 453, the cooling fluid opens into an outflow conduit 432 defined outside of the tubular member 430 and then exits the male mold member 402.

The cooling circuit for cooling the neck of the preform and the other cooling circuit for cooling the bottom and side walls of the preform are independent of one another. In other words, in the male mold element 402, the cooling fluid circulating in the cooling circuit is not mixed with the cooling fluid circulating in the other cooling circuit.

Figure 13 shows a molding unit 60 for obtaining an object 505 comprised of a polymeric material, such as a lid of a container.

However, the following description will be made with reference to FIG. A mold for forming an object other than the cover to obtain, for example, an object such as a seal, a preform, or a container.

The molding unit 60 includes a male mold member 502 adapted to form the object 505 therein. The molding unit 60 further includes a female mold member 61 adapted to form an outer surface of the object 505.

In the example shown in FIG. 13, the male mold member 502 and the female mold member 61 are assembled to obtain the object 505 by compression molding. However, the following description can also be applied to an object obtained by injection molding.

The male mold member 502 includes a central forming core 503 having a forming end for internally forming a base wall of the object 505. Further, the forming end of the central forming core 503 is assembled to form a portion of a sealing lip projecting from the base wall of the object 505.

The central forming core 503 extends along a longitudinal axis Z2.

The male mold member 502 further includes a tubular forming member 504, and the tubular forming member 504 is disposed outside the central forming core 503 and is shown in detail in FIG. In detail, the tubular forming member 504 forms a core 503 around the center.

The tubular forming member 504 has a shaped end 62 and the shaped end 62 is configured to form a portion of the sealing lip of the object 505. More specifically, the central forming core 503 forms an inner surface of the sealing lip and the tubular forming member 504 forms an outer surface of the lip.

Further, the formed end 62 of the tubular forming member 504 is disposed to form a side wall of the object 505 therein. If the object 505 is a cover, the side wall may have a consolidation element, such as a thread, to secure the cover to a closure On the container.

It will be appreciated that the shaped end 62 of the tubular forming member 504 can be constructed differently than described above, particularly when the object 505 is not a lid.

The tubular forming member 504 is assembled into a heat pipe. In detail, the tubular forming member 504, even though this is not visible in FIG. 14, is hollow on the inside and houses a liquid that fills a portion of the volume defined within the tubular forming member 504. The tubular forming member 504, and more generally, the operating principle of the heat pipe is based on the removal of heat from the object 505 due to changes in the state of the liquid contained within the heat pipe. Due to the heat emitted by the molded polymeric material, the liquid enters the gaseous state from the liquid state.

The male mold member 502 further includes a cooling circuit for cooling the tubular forming member 504, or more generally, the heat pipe. The cooling circuit is partially formed within a component 506 that supports the tubular forming member 504. The tubular forming member 504 can be mounted to the assembly 506 by a removable connection, for example, by a threaded connection.

The assembly 506 can have a tubular configuration.

The tubular forming member 504 has an end region that is received within the assembly 506.

The cooling circuit includes an inlet conduit 513 formed in the assembly 506, such as by the thickness of the assembly 506.

The inlet conduit 513 can be a longitudinal conduit, i.e. it can extend parallel to the longitudinal axis Z2.

Further provided is a similarly formed in the component 506 The outlet conduit is shown. The outlet conduit can also be longitudinal, i.e. arranged parallel to the longitudinal axis Z2. The outlet conduit can be disposed at a position diametrically opposite the location of the inlet conduit 513.

The inlet conduit 513 and the unillustrated outlet conduit are in communication with an annular conduit 527 disposed to cool the tubular forming member 504. The annular conduit 527 is defined between the assembly 506 and the tubular forming member 504.

The annular conduit 527 can extend along an extension that is assembled to enclose a line in an annular manner and is located in a plane transverse to the longitudinal axis Z2, particularly perpendicular.

Two seal rings 64 may be disposed between the assembly 506 and the tubular forming member 504 on opposite sides of the annular conduit 527. The seal rings 64 prevent the cooling fluid from leaking between the assembly 506 and the tubular forming member 504.

The male mold element 502 further includes another cooling circuit adapted to cool the central forming core 503.

The further cooling circuit can include an inflow conduit 529 formed in a tubular member 530, and the tubular member 530 extends along the longitudinal axis Z2. The tubular member 530 is disposed within the central forming core 503.

Through the inflow conduit 529, a cooling fluid circulating in the other cooling circuit can be delivered to the forming end of the central forming core 503 to cool the base wall and, if desired, the sealing lip of the object 505.

An outflow conduit 532 is formed in the central forming core 503 for removal in the other cooling back after the cooling fluid has cooled the object 505 The cooling fluid circulating in the road. The outflow conduit 532 can be defined in a gap and the gap is disposed between the tubular member 530 and the central forming core 503.

The other cooling circuit formed in the central forming core 503 is independent of the cooling circuit that cools the tubular forming member 504.

The other components of the male mold component 502 are the same as those of the male mold component 2 described with reference to FIG. 1 and will not be described in detail.

In operation, although the object 505 is formed between the male mold member 502 and the female mold member 61, the heat pipe that implements the tubular forming member 504 cools the thermally polymerized material forming the object 505. The liquid contained in the heat pipe is heated and enters a gaseous state, so a large amount of heat is removed by the object 505.

A cooling fluid enters the cooling circuit associated with the tubular forming member 504 through the inlet conduit 513. The cooling fluid reaches the annular conduit 527 and cools the tubular forming member 504, the heat pipe. In detail, the cooling fluid cools one end region 63 of the tubular forming member 504 opposite the forming end 62.

After the tubular forming member 504 has been cooled, the cooling fluid exits the cooling circuit through an unillustrated outlet conduit formed in the assembly 506.

Simultaneously, the temperature of the central forming core 503 may still be limited by the cooling fluid circulating in the other cooling circuit associated with the central forming core 503.

Therefore, the object 505 can be effectively cooled, so that the production speed can be increased. Plus, the cycle time can be reduced.

In the illustrated example, the heat pipe defines an element, namely the tubular forming member 504, that is used to contact the polymeric material to form the object 505.

In another embodiment, a heat pipe can also be used to implement the mold assembly other than the tubular forming member 504 for contacting the polymeric material. For example, one or more of the components of the master member 61 for contacting the polymeric material can be implemented as a heat pipe.

A heat pipe can also be used to achieve a mold assembly that does not have to be in direct contact with the polymeric material, in which case the heat pipe will be configured to remove heat from a forming element that interacts with the polymeric material.

For example, the tubular forming member 504 can be implemented in two parts, i.e., the forming end 62 can be formed as a different component than the remainder of the tubular forming member 504.

In this case, the forming end 62 can be assembled as a solid body composed of a material having good thermal conductivity properties. The remainder of the tubular forming member 504 can be additionally implemented as a heat pipe.

This latter solution can be successfully used when the shaped end has a very complex geometry that makes it difficult to implement with a heat pipe.

In summary, even if it is not required to be designed to be in direct contact with the polymeric material from which the object is formed, a heat pipe can be used to implement a mold assembly that can be placed between the object and a cooling circuit of a cooling fluid cycle.

Figure 15 is a schematic representation of a suitable formation by injection or compression molding One of the male mold elements of the object constructed of polymeric material forms a tubular member 604. The object formed by the male mold element partially shown in Fig. 15 may be, for example, a lid for a container, a seal for a lid, a container or a preform for obtaining a container, particularly a bottle. .

The tubular forming member 604 has a longitudinal axis Z3.

The tubular forming member 604 has a forming end 662 that is schematically depicted in Figure 15 and that interacts with the polymeric material to form the polymeric material in accordance with a desired geometry.

The tubular forming member 604 further has a support end 663 opposite the forming end 662, and the support end 663 can be affixed to one of the male mold elements not shown.

The tubular forming member 604 can be implemented in two parts. In detail, the tubular forming member 604 can include an outer component 607 and an inner component 608 shown in phantom in FIG.

The outer component 607 and the outer component 607 can each have a substantially tubular configuration. The inner component 608 is coaxially disposed within the outer component 607 relative to the outer component 607.

The outer component 607 and the inner component 608 can be interconnected due to a removable connection, i.e., a non-permanent connection.

The tubular forming member 604 has a cooling circuit through which a cooling fluid can circulate in the tubular forming member 604 to cool the forming end 662.

The cooling circuit can include an annular conduit 627 formed in the formed end of the tubular forming member 604. Ring guide A tube 627 can be defined between the outer component 607 and the inner component 608. For example, the annular conduit 627 can be defined by a groove formed in the outer component 607 and radially closed by an inner component 608 that can have a smooth outer surface. The annular conduit 627 can also be defined by a groove formed in the inner component 608, or by two opposing grooves formed in the inner component 608 and in the outer component 607, respectively.

The annular conduit 627 extends along an extension line and the extension is closed in an annular manner about the longitudinal axis Z3. The extension line can be located in a plane transverse to the longitudinal axis, particularly perpendicular to the longitudinal axis. The extension line can be rounded.

An inlet passage 622 is in communication with the annular conduit 627, for example, into the annular conduit 627. The inlet passage 622 is defined between the outer component 607 and the inner component 608.

The inlet passage 622 allows cooling fluid entering the male mold element to reach the annular conduit 627.

The inlet passage 622 extends longitudinally in the tubular forming member 604. In detail, the inlet passage 622 can be parallel to the longitudinal axis Z3.

The cooling circuit further includes an outlet passage 623 that communicates with the annular conduit 627 to deliver cooling fluid circulating in the annular conduit 627 to the support end 663. In detail, the outlet passage 623 is defined between the outer component 607 and the inner component 608.

The outlet passage 623 allows the cooling fluid to exit the male mold element after passing through the annular conduit 627.

The outlet passage 623 is similarly in the tubular forming member 604 Extend longitudinally. In detail, the exit passage 623 can be parallel to the longitudinal axis Z3.

In the example shown in FIG. 15, the inlet passage 622 and the outlet passage 623 are defined by respective longitudinal passages 620 formed in an inner surface of one of the outer members 607. The channels 620 are radially closed by a cylindrical outer surface of the outer component 607.

Alternatively, the inlet passage 622 and/or the outlet passage 623 can be defined by respective longitudinal passages formed on an outer surface of one of the inner components 608 and radially closed by a cylindrical outer surface of the outer assembly 607.

There may be defined longitudinal passages on the inner assembly 608 and on the outer assembly 607, and the inlet passages 622 and/or the outlet passages 623 are defined when the longitudinal passages face each other.

In any event, the inlet passage 622 and the outlet passage 623 can each have an angular dimension of at least 10, preferably at least 30, about the longitudinal axis Z3. In this manner, the inlet passage 622 and the outlet passage 623 will ensure a high flow of cooling fluid to effectively cool the forming end 662.

The inlet passage 622 and the outlet passage 623 may be disposed at diametrically opposed positions.

In another embodiment, the cooling circuit can include a plurality of inlet passages 622 that are configured to surround the longitudinal axis Z3 to deliver the cooling fluid to the annular conduit 627.

The cooling circuit may also include a plurality of outlet passages 623 that are configured to surround the longitudinal axis Z3 to remove the cooling fluid from the annular conduit 627.

In this case, the sum of the angular dimensions of the inlet passages 622 surrounding the longitudinal axis Z3 may be equal to at least 10°, preferably greater than 30°. The same can be applied to the sum of the angular dimensions of the exit passages 623.

The tubular forming member 604 further includes a coupling assembly 606 disposed on the support end 663 to deliver the cooling fluid to a cooling circuit formed in the tubular forming member 604, and the cooling fluid is discharged by the circuit.

To accomplish this, the attachment assembly 606 can have an inlet 615 shaped, for example, like an inlet aperture to deliver cooling fluid from an unillustrated source to the inlet passage 622.

The attachment assembly 606 can further have an outlet 616 shaped, for example, like an outlet aperture to remove cooling fluid from the outlet passage 623.

The inlet 615 and the outlet 616 may be longitudinal, i.e., disposed parallel to the longitudinal axis Z3, for example, at respective diametrically opposed positions relative to the longitudinal axis Z3.

The inlet 615 and the outlet 616 face the inlet passage 622 and the outlet passage 623 along an interface region 670, respectively, and the interface region 670 can be assembled as a planar interface that is transversely intersected with the longitudinal axis Z3, particularly vertically.

In the interface region 670, the outer component 607 is in contact with the connection assembly 606.

The angular extent of the inlet passage 622 and the outlet passage 623 measured in the interface region 670 is greater than the corresponding angular extent of the inlet 615 and the outlet 616, respectively. In this manner, the inlet 615 can be defined to be in fluid communication with the inlet passage 622 and the outlet 616 will be associated with the outlet The outer passage 623 fluidly communicates with the outer passage member 607 at a plurality of angular positions relative to the joint assembly 606.

The inlet 615 and the outlet 616 thus define a first passage member, and the inlet passage 622 and the outlet passage 623 define a second passage member that is at a majority of the outer assembly 607 relative to the connection assembly 606 The position fluidly communicates (particularly faces) the second passage member.

The connection assembly 606 can have a reference member 665 that is shaped, for example, as a pin, and can engage one of the holes of the support member to ensure that the connection assembly 606 is mounted at a predetermined angular position relative to one of the support members. .

The male mold member can further include a central portion formed in one of the tubular forming members 604 to form a core to form a portion of the object to be obtained, particularly one of the base walls of the object. If the male mold element is assembled to form a cover or seal, the central forming core can have a structure similar to that shown in Figures 1 and 2 to form the core 3.

Another cooling circuit may be formed in the central forming core, wherein a cooling fluid will circulate to cool the object formed by the central forming core.

The other cooling circuit formed in the central forming core is independent of the cooling circuit formed in the tubular forming member 604. In other words, the cooling fluid circulating in the two circuits is not mixed together in the male mold element.

The aforementioned cooling circuit and another cooling circuit can effectively cool the middle The central forming core and the tubular forming member 604, particularly if the central forming core and the tubular forming member 604 are movable relative to each other, for example, to remove a portion of the shaped object having the undercut from the male mold member.

In general, the transfer recess, the return recess, the passage, the inlet passage and the inlet passage, and the number thereof can be freely selected as long as a sufficient cooling fluid flow is ensured. For example, a channel, recess or channel having a portion of a circular cross section is very easily obtained by cutting with a cutting tool, but may be shaped other than a partial circle. In addition, the flow of cooling fluid is equal, reducing the angular extent of the recess, passage or passage and increasing its depth. This applies to all of the illustrated embodiments.

6‧‧‧First component

7‧‧‧second component

15‧‧‧Transfer recess

16‧‧‧Return to the recess

17‧‧‧Separate surface

20‧‧‧ channel

21‧‧‧Surface

22‧‧‧Entry access

23‧‧‧Export access

C‧‧‧Ideal round hole

D‧‧‧diameter

Claims (21)

A male mold component comprising a cooling circuit having a first passage member formed in a first component of the male mold member and a second passage member formed in a second assembly of the male mold member The first passage member and the second passage member are distributed around one of the longitudinal axes of the male mold member such that the first assembly has a plurality of angular positions relative to the second member, wherein the first passage member and the first passage member The second passage member is in fluid communication, wherein the second component is fixed to the first component by a removable connection such that the second component is mounted during operation of the male mold component Rotating relative to the first component. The male mold component of claim 1, wherein the removable connection is a threaded connection. The male mold component of claim 1, wherein the second component has a fixing end removably fixed to the first component, and another end opposite to the fixing end, the second passage member is The converging end extends toward the other end and faces the first passage member in an interface region between the first component and the second component. The male mold component of claim 3, wherein in the interface region, the consolidating end of the second component is inserted into the first component such that one of the lengths of the second component is within the first component And the remaining portion of the length of the second component protrudes from the first component. The male mode component of claim 3, wherein the interface region is shaped as a The longitudinal axis is disposed transversely to a plane such that in the interface region, the first passage member faces the second passage member. The male mold component of claim 3, wherein the other end of the second component is used to form a forming end of a portion of the object. The male mold component of claim 1, wherein the first passage member comprises at least one first passage in a longitudinal direction, and the second passage member comprises at least a second passage in a longitudinal direction, the first passage having a longitudinal axis surrounding the longitudinal axis An angular dimension that is greater than an angular extent of the second passage about the longitudinal axis such that, in the plurality of angular positions, the at least one second passage faces the at least one of the entire angular extent of the second passage One way. The male mold component of claim 1, wherein the first passage member comprises a transfer recess and a return recess, the second passage member comprising a plurality of channels distributed around the longitudinal axis. The male mold component of claim 8, wherein the transfer recess and the return recess are formed at the same height along the longitudinal axis in the first component. The male mold member of claim 8, wherein the transfer recess and the return recess are disposed at positions diametrically opposed to the longitudinal axis. The male mold component of claim 8, wherein a pair of divided surfaces are disposed between the transfer recess and the return recess, each of the separation surfaces being in contact with a surface portion of the second component to isolate the transfer recess and This returns to the recess. The male mold component of claim 11, wherein at least one of the plurality of channels faces the transfer recess, at least one of the channels faces the return recess, and at least one of the channels faces the separate table surface. The male mold component of claim 8, wherein the transfer recess and the return recess are formed on an inner surface of the first component, and some of the plurality of channels are formed on an outer surface of the second component . The male mold component of claim 1, and further comprising a tubular forming member, and the tubular forming member has a forming surface for forming a portion of the object, the first component and the second component being included in the In the tubular forming member, the forming surface is formed on the second component. The male mold component of claim 14, wherein the tubular forming member comprises a third component that is coaxial with the second component. The male mold component of claim 15, wherein the first passage member comprises a transfer recess and a return recess, the second passage member comprising a plurality of channels distributed around the longitudinal axis, and wherein certain passages of the plurality of passages A region of the second component that protrudes from the first component continues to extend, one side of the third component facing the channels in the region to enclose the channels and define a plurality of corresponding conduits. The male mold component of claim 14, wherein the first passage member comprises a transfer recess and a return recess, the second passage member includes a plurality of channels distributed around the longitudinal axis, and wherein the cooling circuit includes a communication conduit, The communication conduit is formed as an annular conduit and communicates with the transfer recess and the return recess through a plurality of passages of the plurality of passages, the communication conduit being disposed adjacent to the forming surface. The male mold component of claim 17, wherein the tubular forming member comprises a third component coaxial with the second component, and wherein the connecting conduit is bounded Between the second component and the third component. The male mold member of claim 14, and further comprising a central forming core disposed within the tubular forming member for forming another portion of the object. The male mold component of claim 19, and further comprising another cooling circuit for cooling the central forming core, the other cooling circuit being independent of the cooling circuit. A male mold member as claimed in claim 19, and further comprising a moving means for creating a relative movement between the central forming core and the tubular forming member, such as being formed between the central forming core and the tubular forming member. An undercut part.