CN109130017B - Mould for umbrella valve, forming equipment and mould opening method thereof - Google Patents
Mould for umbrella valve, forming equipment and mould opening method thereof Download PDFInfo
- Publication number
- CN109130017B CN109130017B CN201810936574.8A CN201810936574A CN109130017B CN 109130017 B CN109130017 B CN 109130017B CN 201810936574 A CN201810936574 A CN 201810936574A CN 109130017 B CN109130017 B CN 109130017B
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- movable plate
- die
- mold
- umbrella valve
- upper die
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/12—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with flat, dished, or bowl-shaped diaphragm
Abstract
The invention discloses a mould for an umbrella valve, forming equipment and a mould opening method thereof, wherein the mould for the umbrella valve comprises an upper mould, a movable plate, a middle mould, a lower mould and an elastic mechanism, wherein the movable plate is positioned below the lower mould and can move up and down relative to the upper mould; the middle die is positioned below the movable plate, and a first parting surface is defined when the middle die and the movable plate are matched; the lower die is positioned below the middle die, and a second parting surface is defined when the lower die and the middle die are closed; the upper die, the movable plate, the middle die and the lower die jointly define a cavity matched with the umbrella valve; the elastic mechanism is arranged between the movable plate and the upper die and is in a compressed state when the movable plate and the upper die are clamped, so as to provide downward elastic acting force on the movable plate. According to the mold for the umbrella valve, the molding equipment and the mold opening method thereof provided by the embodiment of the invention, smooth and reliable demolding can be realized, and the yield of products is high and the processing efficiency is high.
Description
Technical Field
The invention relates to the technical field of molds, in particular to a mold for an umbrella valve, molding equipment and a mold opening method thereof.
Background
The umbrella valve is an umbrella-shaped sealing diaphragm which is formed by rubber materials and has the appearance of one umbrella. Umbrella valve can let the fluid pass through unidirectionally from one direction, prevents the fluid from flowing backward from opposite direction. The valve can be designed to automatically open and close in a specified pressure range, wherein the specified opening pressure can be used for different low-to-high pressure working ranges in terms of design. The cracking pressure is affected by factors such as material hardness, effective flow area, sealing surface initial load pressure, umbrella face thickness, etc. The application range comprises: micro diaphragm pumps, fuel tanks, emergency masks, and other flow control devices for medical use, home appliances, and the like.
Referring to fig. 1 to 2, umbrella valve 10 generally comprises a cap 101 and a stem 102 extending downward from the center of cap 101, and a radially protruding ball 103 is formed on stem 102 adjacent to cap 101.
Referring to fig. 3, in application, the stem 102 passes through the central hole 111 on the valve plate 11, the ball 103 is stopped on the lower surface of the valve plate 11, the cap 101 is attached to the upper surface of the valve plate 11, the periphery of the central hole 111 on the valve plate 11 is provided with a fluid through hole 112, the fluid enters the fluid through hole 112 from bottom to top at a pressure greater than the opening pressure of the umbrella valve 10, the cap 101 is forced to deform in a direction away from the valve plate 11 to open the fluid through hole 112, and the fluid flows out from the fluid through hole 112.
Referring to fig. 4 to 5, in the related art, the umbrella valve mold includes an upper mold 12, an intermediate mold 13, and a lower mold 14, a cavity P12 is formed between the upper mold 12, the intermediate mold 13, and the lower mold 14, and the umbrella valve 10 molded in the cavity P12 is placed in the forward direction, that is, the cap 101 is located above, and the ball 103 is located below. When the mold is opened, the upper mold 12 is driven to translate upwards, and then the whole umbrella-shaped valve 10 is forcedly pulled out from the middle mold 13 and the lower mold 14. In the mold for umbrella-shaped valve and the mold opening method, when the whole umbrella-shaped valve 10 is forcibly pulled out, the mold is difficult to be removed because of the resistance of the ball head 103 and the negative pressure in the lower mold 14, and a large number of defective products are easily caused by breakage of the ball head 103; in addition, in the broken part of the rod 102 or the part of the rod 102 and the ball 103 left-behind point cavity P12, cleaning is needed, so that continuous molding is difficult, and the processing efficiency is low; moreover, since the umbrella valve 10 has a small size and a corresponding cavity has a small size, the cleaning is difficult, the die is easy to discard, and the cost is high.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an object of the present invention is to propose a mould for umbrella valves.
Another object of the present invention is to propose a forming device.
It is still another object of the present invention to provide a method of mold opening.
In order to achieve the above object, in one aspect, according to an embodiment of the present invention, an umbrella valve mold including a cap body and a stem portion extending downward from a center of the cap body, the stem portion being formed with a radially protruding ball portion adjacent to the cap body, the umbrella valve mold includes:
an upper die;
The movable plate is positioned below the lower die and can move up and down relative to the upper die;
The middle die is positioned below the movable plate, and a first parting surface for parting on the ball part is defined when the middle die and the movable plate are clamped;
the lower die is positioned below the middle die, and a second parting surface for parting on the cap body is defined when the lower die and the middle die are clamped;
The upper die, the movable plate, the middle die and the lower die jointly define a cavity matched with the umbrella valve;
at least one elastic mechanism is arranged between the movable plate and the upper die and is in a compressed state when the movable plate and the upper die are clamped, so that downward elastic acting force is provided to act on the movable plate.
According to one embodiment of the invention, the elastic mechanism comprises:
the upper die is provided with a through hole, and the elastic piece is positioned in the through hole;
The connecting piece is arranged in the through hole in a sliding penetrating mode, the upper end of the connecting piece is connected with the elastic piece, and the lower end of the connecting piece is connected with the movable plate.
According to one embodiment of the invention, the through hole comprises a first hole section and a second hole section which are coaxially connected, wherein the first hole section is positioned above the second hole section and forms a step surface with the second hole section;
The connecting piece comprises a head and a rod part, the head is movably arranged in the first hole section and props against the step surface, the rod part is arranged in the second hole section in a sliding penetrating manner, the upper end of the rod part is connected with the head, and the lower end of the rod part is connected with the movable plate;
the elastic piece is arranged in the first hole section, and the lower end of the elastic piece abuts against the head.
According to one embodiment of the invention, the movable plate is provided with a threaded hole, and the lower end of the rod part is provided with external threads matched with the threaded hole.
According to one embodiment of the invention, the lower surface of the upper die is provided with a boss, the upper surface of the middle die is provided with a concave cavity, the movable plate is positioned below the boss, and the boss and the movable plate are pressed into the concave cavity when the upper die, the movable plate and the middle die are clamped.
According to one embodiment of the invention, the boss, the movable plate, the middle die and the lower die jointly define a plurality of cavities, and the cavities are distributed in a matrix.
According to one embodiment of the invention, the concave cavity is formed into a tapered shape with the cross-sectional area gradually reduced from top to bottom, and the boss and the movable plate are matched with the concave cavity in shape.
According to one embodiment of the invention, the number of the bosses and the number of the movable plates are plural, the bosses are arranged on the lower surface of the upper die at intervals, and the movable plates are in one-to-one correspondence with the bosses; the concave cavities are arranged on the lower surface of the upper die at intervals and correspond to the movable plates one by one.
On the other hand, the molding apparatus according to the embodiment of the present invention includes the power device and the mold for umbrella valve as described above, the power device being connected to the mold for umbrella valve.
In still another aspect, a method for opening a mold for an umbrella valve according to an embodiment of the present invention includes:
the power device drives the upper die to move upwards and gradually separate from the movable plate, at the moment, the elastic mechanism is gradually released, and the movable plate keeps being attached to the middle die and still under the downward elastic acting force provided by the elastic mechanism;
When the upper die moves upwards to a preset height position, the elastic mechanism is completely released, and the movable plate moves upwards synchronously with the elastic mechanism;
The power device drives the middle die to move upwards and gradually separate from the lower die.
According to the mold, the molding equipment and the mold opening method for the umbrella valve provided by the embodiment of the invention, on one hand, the movable plate capable of moving up and down is arranged below the upper mold, the elastic mechanism is arranged between the movable plate and the upper mold, and on the other hand, the cavity defined by the upper mold, the movable plate, the middle mold and the lower mold together is inverted, namely, the cap body is positioned below (between the lower mold and the middle mold), the ball part is positioned above (between the middle mold and the movable plate), the middle mold and the movable plate define a first parting surface for parting the ball part when being clamped, and the lower mold and the middle mold define a second parting surface for parting the cap body when being clamped. When the upper die is opened, the power device drives the upper die to move upwards and gradually separate from the movable plate, at the moment, the elastic mechanism is gradually released, and the movable plate keeps being attached to the middle die under the downward elastic acting force provided by the elastic mechanism, so that the upper die can be released firstly, and when the upper die is released, the upper end of the die cavity can be opened, and the negative pressure in the die cavity is broken; then, when the upper die moves upwards to a preset height position, the elastic mechanism is completely released, and the movable plate moves upwards synchronously with the upper die, at the moment, because the first parting surface is arranged on the ball part and the negative pressure in the cavity is broken, the movable plate can be easily separated from the umbrella-shaped valve and separated from the middle die when moving upwards; finally, the power device drives the middle die to move upwards and gradually separate from the lower die and the umbrella-shaped valve, so that smooth and reliable demolding can be realized, the yield of products is high, and the processing efficiency is high.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of an umbrella valve;
FIG. 2 is a front view of an umbrella valve;
FIG. 3 is an application scenario diagram of an umbrella valve;
FIG. 4 is a schematic diagram of a prior art umbrella valve mold;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic view of a mold for an umbrella valve according to an embodiment of the present invention;
FIG. 7 is a top view of a mold for an umbrella valve according to an embodiment of the present invention;
FIG. 8 is a cross-sectional view at A-A in FIG. 7;
FIG. 9 is a partial enlarged view at B in FIG. 8;
FIG. 10 is a cross-sectional view at B-B in FIG. 7;
FIG. 11 is an enlarged view of a portion of FIG. 10 at C;
fig. 12 is a partial enlarged view at D in fig. 11;
FIG. 13 is an exploded view of a mold for an umbrella valve according to an embodiment of the present invention;
FIG. 14 is an exploded view of another view of the mold for umbrella valves of the embodiment of the present invention;
FIG. 15 shows a method for opening a mold for an umbrella valve according to an embodiment of the present invention.
Reference numerals:
an upper die 20;
A through hole H20;
A first bore section H201;
A second bore section H202;
a step surface S20;
a boss 201;
a movable plate 21;
A screw hole H21;
an intermediate die 22;
A cavity P22;
A lower die 23;
an elastic mechanism 24;
an elastic member 241;
A connector 242;
A head 2421;
A stem 2422;
A cavity P20;
cap cavity P201;
Ball cavity P202;
a rod cavity P203;
a first parting surface S01;
and a second parting plane S02.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present invention and should not be construed as limiting the invention, and all other embodiments, based on the embodiments of the present invention, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The mold for umbrella valve according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 6 to 14, according to an embodiment of the present invention, there is provided a mold for an umbrella valve including a cap body and a stem 2422 extending downward from the center of the cap body, the stem 2422 having a radially protruding ball portion formed adjacent to the cap body, the mold for an umbrella valve including an upper mold 20, a movable plate 21, an intermediate mold 22 and a lower mold 23.
Specifically, the movable plate 21 is located below the lower die 23 and is movable up and down with respect to the upper die 20. The intermediate die 22 is located below the movable plate 21, and the intermediate die 22 defines a first parting plane S01 for parting the ball portion when the movable plate 21 is clamped. The lower die 23 is located below the middle die 22, and the lower die 23 and the middle die 22 define a second parting surface S02 for parting on the cap body when they are clamped. The upper mould 20, the movable plate 21, the middle mould 22 and the lower mould 23 together define a cavity P20 adapted to the umbrella valve. At least one elastic mechanism 24 is provided between the movable plate 21 and the upper die 20, and is in a compressed state when the movable plate 21 and the upper die 20 are clamped, so as to provide a downward elastic force on the movable plate 21.
That is, the upper die 20, the movable plate 21, the intermediate die 22, and the lower die 23 are disposed in this order from top to bottom, and the movable plate 21 is connected to the upper die 20 by the elastic mechanism 24, and the movable plate 21 is movable up and down with respect to the upper die 20, and when the upper die 20 and the movable plate 21 are clamped (i.e., the lower surface of the upper die 20 is brought into contact with the upper surface of the movable plate 21), the elastic mechanism 24 is compressed, and in the compressed state, the elastic mechanism 24 provides a downward elastic force to the movable plate 21, so that the movable plate 21 is brought into contact with the lower intermediate die.
In addition, a first parting plane S01 is defined between the middle mold 22 and the movable plate 21, a second parting plane S02 is defined between the lower mold 23 and the middle mold 22, a cavity P20 is defined between the upper mold 20, the movable plate 21, the middle mold 22 and the lower mold 23, the cavity P20 includes a cap cavity P201, a ball cavity P202 and a rod cavity P203, the cap cavity P201 is located between the middle mold 22 and the lower mold 23 and is divided into two parts by the second parting plane S02, one part is located on the lower surface of the middle mold 22, the other part is located on the upper surface of the lower mold 23, the ball cavity P202 is located between the movable plate 21 and the middle mold 22 and is divided into two parts by the first parting plane S01, one part is located on the lower surface of the movable plate 21, the other part is located on the upper surface of the middle mold 22, and the rod cavity P203 penetrates the middle mold 22 from the upper surface of the movable plate 21 and is sequentially communicated with the ball cavity P202 and the cap cavity P201.
According to the mold for umbrella valve provided by the embodiment of the invention, on one hand, the movable plate 21 capable of moving up and down is arranged below the upper mold 20, and the elastic mechanism 24 is arranged between the movable plate 21 and the upper mold 20, on the other hand, the cavity P20 defined by the upper mold 20, the movable plate 21, the middle mold 22 and the lower mold 23 is inverted, that is, the cap body is positioned below (between the lower mold 23 and the middle mold 22), the ball part is positioned above (between the middle mold 22 and the movable plate 21), and the middle mold 22 and the movable plate 21 define a first parting surface S01 for parting the ball part when being clamped, and the lower mold 23 and the middle mold 22 define a second parting surface S02 for parting the cap body when being clamped. When the upper die 20 is opened, the power device drives the upper die 20 to move upwards and gradually separate from the movable plate 21, at the moment, the elastic mechanism 24 is gradually released, and the movable plate 21 keeps being attached to the middle die 22 under the downward elastic force provided by the elastic mechanism 24, so that the upper die 20 can be kept to be released firstly, and when the upper die 20 is released, the upper end of the cavity P20 can be opened to break the negative pressure in the cavity P20; then, when the upper die 20 moves upward to a predetermined height position, the elastic mechanism 24 is completely released, and the movable plate 21 moves upward in synchronization therewith, at this time, since the first parting surface S01 is on the ball portion and the negative pressure in the cavity P20 has been broken, the movable plate 21 can be easily separated from the umbrella valve and separated from the intermediate die 22 when moving upward; finally, the power device drives the middle die 22 to move upwards and gradually separate from the lower die 23 and the umbrella-shaped valve, so that smooth and reliable demoulding can be realized, and the yield of products is high and the processing efficiency is high.
Referring to fig. 9, in some embodiments of the present invention, the elastic mechanism 24 includes an elastic member 241 and a connecting member 242, and the upper die 20 is provided with a through hole H20, and the elastic member 241 is located in the through hole H20; the connecting piece 242 is slidably disposed in the through hole H20, and the upper end of the connecting piece 242 is connected to the elastic piece 241, and the lower end of the connecting piece 242 is connected to the movable plate 21.
That is, the elastic mechanism 24 mainly comprises an elastic member 241 and a connecting member 242, preferably, the elastic member 241 may be a compression spring, the upper die 20 is provided with a through hole H20, the elastic member 241 and the connecting member 242 are both positioned in the through hole H20, the elastic member 241 is positioned above the connecting member 242, the upper end of the connecting member 242 is connected with the elastic member 241, and the lower end of the connecting member 242 is connected with the movable plate 21.
In a specific application, the upper die 20 is generally connected to the upper die 20 plate, and the upper die 20 plate is attached to the upper die 20 in a direction that the upper end of the elastic member 241, for example, the upper end of the elastic member 241 is connected to the upper die 20 plate, can be restricted by the upper die 20 plate. In operation, in the initial state, the movable plate 21 is far away from the middle die 22, and under the action of the elastic piece 241, the connecting piece 242 pushes the movable plate 21 downwards, so that the movable plate 21 is separated from the upper die 20; when the mold is required to be closed, the upper mold 20 and the movable plate 21 move downward, and before the movable plate 21 has not contacted the intermediate mold 22, the upper mold 20 and the movable plate 21 remain in a separated state and move downward simultaneously until the movable plate 21 contacts the intermediate mold 22, and the movable plate 21 is engaged with the intermediate mold 22 and does not move downward. At this time, the upper mold 20 continues to move downward, the elastic member 241 is gradually compressed, the compressed elastic member 241 applies an elastic force to the movable plate 21 through the connecting member 242, so that the movable plate 21 is closely attached to the middle mold 22, and at the same time, the connecting member 242 gradually moves into the through hole H20 until the elastic member 241 reaches the maximum compression amount when the upper mold 20 moves to be attached to the movable plate 21, and the connecting member 242 is completely retracted into the through hole H20.
When the upper die 20 is required to be opened, the elastic member 241 is gradually restored to deform and extend, and the acting force exerted by the connecting member 242 on the movable member forces the movable member to remain attached to the middle die 22 until the elastic member 241 is restored to the original length, and as the upper die 20 continues to move upwards, the movable plate 21 moves upwards and is separated from the middle die 22.
In this way, on the one hand, the elastic member 241 and the connecting member 242 are used to form the elastic mechanism 24 and are arranged in the through hole H20 of the upper die 20, so that when the upper die 20, the movable plate 21 and the middle die 22 are clamped, the connecting member 242 can be completely retracted into the through hole H20, thereby avoiding interference to the matched die and ensuring that the upper die 20 can be completely adhered to the movable plate 21. On the other hand, when the upper die 20, the movable plate 21 and the middle die 22 are opened, the upper die 20 moves first and the movable plate 21 keeps still, and then the movable plate 21 moves upwards along with the upper die 20 to open the die, so that the upper die 20 is separated first to break the negative pressure in the cavity P20, and then the movable plate 21 is separated from the middle die 22 to separate the die, and the reliability is higher. In addition, the structure is simple, and the assembly is convenient.
Specifically, the through hole H20 includes a first hole section H201 and a second hole section H202 that are coaxially connected, where the first hole section H201 is located above the second hole section H202 and forms a step surface S20 with the second hole section H202.
The connecting piece 242 includes a head 2421 and a stem 2422, the head 2421 is movably mounted in the first hole section H201 and abuts against the step surface S20, the stem 2422 is slidably disposed in the second hole section H202, the upper end of the stem 2422 is connected to the head 2421, and the lower end of the stem 2422 is connected to the movable plate 21.
The elastic member 241 is disposed in the first hole section H201, and the lower end thereof abuts against the head 2421.
That is, the diameter of the first hole section H201 is larger than the diameter of the second hole section H202 such that a stepped surface S20 is formed between the first hole section H201 and the second hole section H202, by which stepped surface S20 the head 2421 of the link 242 is restrained within the first hole section H201, ensuring that the link 242 can slide up and down without falling out of the through hole H20, and by which stepped surface S20 the maximum distance of downward movement of the stem 2422 is defined. The rod 2422 is slidably disposed in the second hole section H202, so that the rod 2422 can be ensured to slide up and down smoothly and reliably.
More specifically, the movable plate 21 is provided with a threaded hole H21, and the lower end of the rod portion 2422 is provided with an external thread matched with the threaded hole H21, that is, the lower end of the rod portion 2422 is connected with the movable plate 21 in a threaded connection manner, so that the assembly is more convenient.
Referring to fig. 8 to 14, in some embodiments of the present invention, a boss 201 is provided on a lower surface of the upper mold 20, a cavity P22 is provided on an upper surface of the middle mold 22, the movable plate 21 is located below the boss 201, and when the upper mold 20, the movable plate 21 and the middle mold 22 are assembled, the boss 201 and the movable plate 21 are pressed into the cavity P22.
When the upper die 20, the movable plate 21 and the middle die 22 are assembled, the movable plate 21 and the boss 201 are attached to and pressed in the concave cavity P22, the shape and the size of the assembled state of the movable plate 21 and the boss 201 are matched with those of the concave cavity P22, so that the movable plate 21 and the boss 201 can be just completely accommodated in the concave cavity P22, other parts of the upper die 20 except the boss 201 are attached to the middle die 22, and the movable plate 21 is attached to the bottom surface of the concave cavity P22, and reliable assembly is realized.
In this embodiment, on the one hand, since the cap and the ball of the umbrella-shaped valve are small in size, and the concave cavity P22 is formed on the upper surface of the middle mold 22, so that the bottom wall of the concave cavity P22 is relatively thin, and correspondingly, the size of the cavity P20 formed in the bottom wall can be matched with the umbrella-shaped valve, so that the size requirement of the umbrella-shaped valve is met, and meanwhile, the part, except for the concave cavity P22, of the middle mold 22 has relatively thick thickness, so that the strength requirement of the mold can be met, and the reliability of the mold in use is ensured. On the other hand, the matching of the boss 201 and the concave cavity P22 can make the die assembly more accurate and reliable.
In some embodiments of the present invention, the boss 201, the movable plate 21, the intermediate mold 22 and the lower mold 23 together define a plurality of cavities P20, and the plurality of cavities P20 are distributed in a matrix. Thus, the plurality of cavities P20 can be molded at one time to form a plurality of umbrella-shaped valves, so that the production and processing efficiency is improved, and meanwhile, the consistency of the quality of the plurality of umbrella-shaped valves is ensured.
Advantageously, the cavity P22 is formed in a tapered shape with a cross-sectional area gradually decreasing from top to bottom, and the boss 201 and the movable plate 21 are shaped to fit the cavity P22. In this way, when the boss 201, the movable plate 21 and the concave cavity P22 are clamped, the guiding function of the tapered concave cavity P22 is utilized to ensure reliable and smooth clamping.
It can be understood that the number of the bosses 201 and the movable plates 21 may be plural, the bosses 201 are arranged on the lower surface of the upper die 20 at intervals, and the movable plates 21 are in one-to-one correspondence with the bosses 201; correspondingly, the number of the cavities P22 is also plural, and plural cavities P22 are arranged on the lower surface of the upper die 20 at intervals and are in one-to-one correspondence with plural movable plates 21. In this way, a plurality of cavities P20 can be defined between each boss 201, the movable plate 21 and a corresponding cavity P22, and a plurality of cavities P20 can be defined by the bosses 201, the movable plate 21 and the cavities P22, so that mass production and processing can be realized, and efficiency is higher.
The embodiment of the invention also provides forming equipment which comprises a power device and the umbrella valve die, wherein the power device is connected with the umbrella valve die.
According to the forming equipment provided by the embodiment of the invention, the mold for the umbrella valve is provided, so that smooth and reliable demolding can be realized, the yield of products is high, and the processing efficiency is high.
The embodiment of the invention also provides a mould opening method for the mould for the umbrella valve, which comprises the following steps:
S10, the power device drives the upper die 20 to move upwards and gradually separate from the movable plate 21, at this time, the elastic mechanism 24 is gradually released, and the movable plate 21 keeps being attached to the middle die 22 under the downward elastic force provided by the elastic mechanism 24.
S11, when the upper die 20 moves upwards to a preset height position, the elastic mechanism 24 is completely released, and the movable plate 21 moves upwards synchronously.
S12, the power device drives the middle die 22 to move upwards and gradually separate from the lower die 23.
That is, when the upper die 20 is driven by the power device to move upward and gradually separate from the movable plate 21, at this time, the elastic mechanism 24 gradually releases the extension, so the elastic mechanism 24 still provides the downward elastic force to act on the movable plate 21, so that the movable plate 21 keeps being attached to the middle die 22, and thus the upper die 20 can be kept released first, and when the upper die 20 is released, the upper end of the cavity P20 can be opened, and the negative pressure in the cavity P20 can be broken.
Then, when the upper die 20 moves upward to a predetermined height position, the elastic mechanism 24 is completely released, and the movable plate 21 moves upward in synchronization therewith, at this time, since the first parting surface S01 is on the ball portion and the negative pressure in the cavity P20 has been broken, the movable plate 21 can be easily separated from the umbrella valve and separated from the intermediate die 22 when moving upward.
Finally, the power device drives the middle die 22 to move upwards and gradually separate from the lower die 23 and the umbrella-shaped valve, so that smooth and reliable demoulding can be realized, and the yield of products is high and the processing efficiency is high.
When the intermediate mold 22 is separated from the lower mold 23 and the umbrella valve, the cap body of the umbrella valve is adsorbed on the lower mold 23 by the vacuum negative pressure in the cap cavity P201 of the cavity P20, so that the umbrella valve is not carried up when the intermediate mold 22 moves upward, and finally, the umbrella valve is left on the lower mold 23, and in the subsequent process, the umbrella valve can be taken out from the lower mold 23 by a grasping mechanism such as a vacuum manipulator.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (6)
1. A mold for an umbrella valve, the umbrella valve comprising a cap body and a stem portion extending downward from the center of the cap body, a radially protruding ball portion being formed on the stem portion adjacent to the cap body, characterized in that the mold for an umbrella valve comprises:
an upper die;
The movable plate is positioned below the upper die and can move up and down relative to the upper die;
The middle die is positioned below the movable plate, and a first parting surface for parting on the ball part is defined when the middle die and the movable plate are clamped;
the lower die is positioned below the middle die, and a second parting surface for parting on the cap body is defined when the lower die and the middle die are clamped;
The upper die, the movable plate, the middle die and the lower die jointly define a cavity matched with the umbrella valve;
at least one elastic mechanism, at least one elastic mechanism is arranged between the movable plate and the upper die and is in a compression state when the movable plate and the upper die are clamped, so as to provide downward elastic acting force on the movable plate;
the elastic mechanism comprises an elastic piece and a connecting piece, the upper die is provided with a through hole, and the elastic piece is positioned in the through hole; the connecting piece can be slidably arranged in the through hole in a penetrating way, the upper end of the connecting piece is connected with the elastic piece, and the lower end of the connecting piece is connected with the movable plate;
The through hole comprises a first hole section and a second hole section which are coaxially connected, and the first hole section is positioned above the second hole section and forms a step surface with the second hole section;
The connecting piece comprises a head and a rod part, the head is movably arranged in the first hole section and props against the step surface, the rod part is arranged in the second hole section in a sliding penetrating manner, the upper end of the rod part is connected with the head, and the lower end of the rod part is connected with the movable plate;
the elastic piece is arranged in the first hole section, and the lower end of the elastic piece is propped against the head part;
The movable plate is provided with a threaded hole, and the lower end of the rod part is provided with external threads matched with the threaded hole; the lower surface of the upper die is provided with a boss, the upper surface of the middle die is provided with a concave cavity, the movable plate is positioned below the boss, and when the upper die, the movable plate and the middle die are assembled, the boss and the movable plate are pressed in the concave cavity.
2. The umbrella valve mold of claim 1, wherein the boss, the movable plate, the intermediate mold and the lower mold together define a plurality of cavities, the plurality of cavities being distributed in a matrix.
3. The umbrella valve mold according to claim 1, wherein the cavity is formed in a tapered shape having a cross-sectional area gradually reduced from top to bottom, and the boss and the movable plate are shaped to fit the cavity.
4. The mold for umbrella valve according to claim 1, wherein the number of the bosses and the number of the movable plates are plural, the plural bosses are arranged on the lower surface of the upper mold at intervals, and the plural movable plates are in one-to-one correspondence with the plural bosses; the concave cavities are arranged on the lower surface of the upper die at intervals and correspond to the movable plates one by one.
5. A molding apparatus comprising a power device and a mold for an umbrella valve according to any one of claims 1 to 4, wherein the power device is connected to the mold for an umbrella valve.
6. A mold opening method for a mold for an umbrella valve as defined in any one of claims 1 to 4, comprising:
the power device drives the upper die to move upwards and gradually separate from the movable plate, at the moment, the elastic mechanism is gradually released, and the movable plate keeps being attached to the middle die and still under the downward elastic acting force provided by the elastic mechanism;
When the upper die moves upwards to a preset height position, the elastic mechanism is completely released, and the movable plate moves upwards synchronously with the elastic mechanism;
The power device drives the middle die to move upwards and gradually separate from the lower die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936574.8A CN109130017B (en) | 2018-08-16 | 2018-08-16 | Mould for umbrella valve, forming equipment and mould opening method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810936574.8A CN109130017B (en) | 2018-08-16 | 2018-08-16 | Mould for umbrella valve, forming equipment and mould opening method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN109130017A CN109130017A (en) | 2019-01-04 |
| CN109130017B true CN109130017B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810936574.8A Active CN109130017B (en) | 2018-08-16 | 2018-08-16 | Mould for umbrella valve, forming equipment and mould opening method thereof |
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| CN (1) | CN109130017B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005254480A (en) * | 2004-03-09 | 2005-09-22 | Nippon Densan Corp | Valve gate type injection molding machine and injection-molding method using it |
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| JPH0834035A (en) * | 1994-07-25 | 1996-02-06 | Apic Yamada Kk | Mold |
| JPH1190960A (en) * | 1997-09-22 | 1999-04-06 | Nok Corp | Molding tool and molding method for rubber product |
| US7175413B1 (en) * | 2002-09-23 | 2007-02-13 | Owens-Illinois Closure Inc. | Elastomeric dispensing valve manufacture |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109130017A (en) | 2019-01-04 |
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