CN113635512B - Improved structure of gas back pressure forming processing mould - Google Patents
Improved structure of gas back pressure forming processing mould Download PDFInfo
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- CN113635512B CN113635512B CN202011308900.4A CN202011308900A CN113635512B CN 113635512 B CN113635512 B CN 113635512B CN 202011308900 A CN202011308900 A CN 202011308900A CN 113635512 B CN113635512 B CN 113635512B
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- 238000012545 processing Methods 0.000 title claims description 11
- 238000000465 moulding Methods 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract description 16
- 239000013518 molded foam Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000005187 foaming Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 210000000497 foam cell Anatomy 0.000 description 2
- 239000004088 foaming agent Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
- B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a forming die improved structure for reducing surface flaws of a polymer molded object, which is characterized in that when the polymer molded foam is formed by a die, a die air hole for exhausting or air intake is not communicated with a die chamber space for molding the polymer molded object, but is connected by a slit-shaped air gap channel, so that air can flow between the die chamber and the air hole through the air gap channel, and the interrupt damage caused by the continuity of the wall of the die chamber is reduced by the narrow shape of the air gap channel, thereby reducing the damage to the continuity of the surface of the polymer molded object completed in the die chamber, and further reducing the flaws on the surface of the molded object, so as to maintain the appearance integrity of the molded object.
Description
Technical Field
The present invention relates to polymer forming technology, and is especially one kind of improved structure of back pressure forming mold.
Background
In the processing technology of molding the polymer raw material by using the mold, air is present in the mold cavity space of the mold in advance of the polymer raw material, so that in order to ensure that the operation of injecting the polymer raw material is not affected, an exhaust passage for exhausting the air in the mold cavity is required to be arranged at a proper position of the mold, so that the air is smoothly exhausted, and the quality of the molded article is not affected by bad exhaust.
In the injection foaming molding technology using supercritical fluid as physical foaming agent, the gas back pressure inside the mold is used to inhibit the polymer material entering the mold from generating foam cells prematurely, and the specific technical content is as disclosed in taiwan patent publication 201208854a, the control valve is used to control the gas pressure in the cavity space, so as to improve the size and distribution of foam cells inside the injection molded article, and improve the molding quality.
It is known that, in order to provide a gas flow path communicating with the mold cavity space, whether the smooth discharge of the gas in the mold cavity space or the change of the gas pressure in the mold cavity space is focused, the gas holes, which are indispensable in the prior art, are provided at appropriate positions of the mold to provide a significant flow space for the gas from outside the mold into the mold cavity space or from outside the mold cavity space, and the gas holes of the gas flow path, which are mostly as disclosed in the 20120854a in the prior art, are of a through hole structure directly communicating with the mold cavity space and are limited by the drilling technology, are also mostly circular in cross-sectional shape and have a diameter of a comparable size.
Although larger diameter air holes can provide larger flow rate of air to facilitate the exhaust or pressurization, because the air holes are directly communicated with the space of the mold chamber in the prior art, the molded object in the mold chamber can be molded into the shape or texture similar to the air holes at the position adjacent to the air holes, and the surface texture and shape do not affect the use efficiency of the molded object, but still have flaws in terms of the aesthetic appearance of the object.
Disclosure of Invention
Therefore, the main object of the present invention is to provide an improved structure of a gas back pressure molding processing mold, which is characterized in that when the mold is used for polymer molding foaming molding, the mold air hole for exhausting or air intake is not directly communicated with the mold room space for molding the polymer object molding shape, but is connected by a slit-shaped air gap channel, so that the gas needs to flow between the mold room and the air hole through the air gap channel, and the break damage caused by the continuity of the wall of the mold room is reduced by the narrow shape of the air gap channel, thereby reducing the break of the continuity of the surface of the polymer molded object completed in the mold room, and further reducing the flaws on the surface of the molded object, so as to maintain the appearance integrity of the molded object.
Thus, in order to achieve the above-mentioned object, the present invention provides an improved structure of a gas back pressure forming processing mold, which structurally comprises a mold body, wherein the space of the mold chamber is located in the mold body for defining the outline shape of the polymer forming object to be formed, the air hole is located on the mold body, and one end opening is located in the mold body and separated from the space of the mold chamber but not communicated with the space, and the other end opening is used as a gas passage opening connected with a control mechanism for gas flow of an external gas source, an air extraction mechanism or a control valve, and the air passage is located in the mold body, and is located between one end opening of the air hole and the mold chamber and communicated with each other.
In order to further reduce the damage degree of the air gap channel to the surface shape of the molded article, the air gap channel is located at the position of the mold clamping line of the mold, and when the channel area of the air gap channel needs to be increased, the air gap channel can be extended and expanded along the plane of the mold clamping line.
The mold body is provided with a first mold and a second mold, the mold chamber and the air gap channel are respectively arranged between the first mold and the second mold, and the space shape of the mold chamber space and the gap height of the air gap channel are respectively defined by the first mold and the second mold. And making the gap height of the air gap channel smaller than the minimum aperture of the air hole.
Preferably, the first mold part and the second mold part are stacked one above the other in the direction of gravity.
Preferably, the first mold member and the second mold member are horizontally attached to each other.
Preferably, the above technical solution further comprises a recess, which is concavely disposed on a side of the first module opposite to the second module or on a side of the second module opposite to the first module, so as to form the air gap channel when the first module and the second module are adjacent to each other.
Preferably, the number of the air holes is plural, and one end of the air holes is communicated with the air gap channel.
Preferably, the air gap passage is formed in a ring shape and communicates with the circumferential side of the mold cavity.
Another object of the present invention is to provide an improved structure of a gas back pressure forming mold, which provides a channel for completely discharging back pressure gas from a plurality of sources when the back pressure gas in the mold enters a mold chamber during the back pressure forming process of the polymer molding process, and is not hindered by the material continuously entering from the sources, so as to avoid influencing the processing quality of the polymer molding process.
Therefore, in order to achieve the above-mentioned other object, the present invention provides an improved structure of a gas back pressure forming mold, which is characterized in that in a mold cavity space, a plurality of sources are respectively arranged on a chamber wall of a part of a space between different materials after entering the mold cavity, and a slit-shaped air gap hole is used for communicating the part of the space, so that the gas in the part of the space can be smoothly discharged out of the mold cavity through the air gap hole under the condition that the volume of the part of the space is continuously reduced due to the continuous entering of raw materials.
In order to provide a proper flow channel between the air gap hole and the outside of the mould, an air collecting space independent of the outside of the mould can be formed in the mould, one end of the air gap hole is communicated with the mould chamber, the other end of the air gap hole is communicated with the air collecting space, and an air channel which is communicated with the air collecting space can be further formed in the mould, so that the air concentrated into the air collecting space can be discharged to the outside of the mould through the air channel.
To increase the range of gas guiding action of the air gap hole on the mold cavity, the air gap hole can be in a serpentine shape in a specific range of the wall of the mold cavity.
In order to facilitate the processing of the air gap hole and the formation of the gas collecting space, the chamber wall of the part of the space for the air gap hole is provided by a separate element, so that the air gap hole arranged on the separate element can be processed conveniently, and the gas collecting space can be defined between the separate element and other adjacent elements.
The independent element can be an inlay with a specific shape and is embedded in an embedding chamber with a corresponding shape so as to define the gas collecting space between the inlay and the embedding chamber.
The method specifically comprises the following steps: a mold body having a first mold part and a second mold part; a mold chamber located in the mold body and defining a space shape of at least a portion of the mold chamber with the first mold member and the second mold member; at least two material injecting channels which are arranged on the first mould part and are communicated with the mould chamber; a slit-like first air gap hole extending from the first mold part in a direction away from the mold part on a partial wall surface between the injection passages in a wall surface of the first mold part defining a side wall of the mold part; the first gas collecting space is defined by the die body, is positioned in the die body, is independent of the die chamber and the outside of the material injection hole, and is communicated with the first air gap hole; the first air passage is arranged on the die body and is communicated with the first gas collecting space and the outside of the die body; by means of the communication among the first air gap hole, the first air collecting space and the first air channel, a flow channel of air between the mold cavity and the outside of the mold body is provided.
Preferably, the first air gap hole is serpentine on the local wall surface.
Preferably, the first air gap hole is between each of the injection channels.
Preferably, the first module further comprises: a first template; the first embedding chamber is concavely arranged on one side surface of the first template; the first inlay is complementarily embedded in the embedded chamber, and one side of the first inlay, which is positioned in the first embedded chamber, is separated from the closed end surface of the first embedded chamber, so as to define the first gas collecting space, and the first air gap hole is penetrated on the first inlay.
Preferably, the first inlay further comprises a first panel, which is complementarily embedded in the first embedded chamber and is attached to the closed end surface of the first embedded chamber by a side plate surface, and a first recess is concavely arranged on the side plate surface of the first panel, and the recess is blocked by the closed end surface of the first embedded chamber, so that the first gas collecting space is defined between the first recess and the closed end surface of the first embedded chamber.
Preferably, each of the injection channels is disposed through the first inlay.
Preferably, the first air gap hole is formed through the first panel with one end opening on the closed side of the first recess.
Preferably, the mold further comprises a third mold, and the second mold is interposed between the first mold and the third mold.
Preferably, the second mold has a plate-shaped second mold plate, and a mold hole is formed through the second mold plate, so that the mold chamber can be defined by the first mold and the third mold closing the two ends of the mold hole.
Preferably, the third module further comprises: a third template; the second embedding chamber is concavely arranged on one side surface of the third template opposite to the second mould part and corresponds to the orifice of the mould hole; a second inlay which is complementarily embedded in the second embedding chamber and is opposite to the die hole by one side surface; a second gas collecting space defined between the other side of the second inlay and the closed end face of the second inlay chamber; a slit-shaped second air gap hole penetrating the second inlay and having one end opening communicating with the second gas collecting space and the other end opening communicating with the mold chamber; and the second air passage is arranged in the third mould part and is communicated with the second gas collecting space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a perspective view of a first preferred embodiment of the present invention, showing a mold clamping state.
Fig. 2 is a perspective view of a first preferred embodiment of the present invention, showing an open state of the mold.
Fig. 3 is a top view of a second module according to a first preferred embodiment of the invention.
Fig. 4 is a bottom view of the second module of the first preferred embodiment of the present invention.
Fig. 5 is a perspective schematic view of a part of the elements of the first preferred embodiment of the present invention.
Fig. 6 is a cross-sectional view of the first preferred embodiment of the present invention taken along line 6-6 in fig. 1.
Fig. 7 is an enlarged view of a portion a of fig. 6.
Fig. 8 is an enlarged view of a portion B of fig. 6.
Fig. 9 is a cross-sectional view of a second preferred embodiment of the present invention.
Fig. 10 is a perspective view of a third preferred embodiment of the present invention.
Fig. 11 is an exploded view of a third preferred embodiment of the present invention.
Fig. 12 is a cross-sectional view of a third preferred embodiment of the present invention taken along line 12-12 in fig. 10.
Fig. 13 is a schematic view illustrating the use of a third preferred embodiment of the present invention.
Fig. 14 is a cross-sectional view of a third preferred embodiment of the present invention taken along line 14-14 in fig. 10.
Fig. 15 is a cross-sectional view of a third preferred embodiment of the present invention taken along line 15-15 in fig. 10.
Fig. 16 is a cross-sectional view of the third preferred embodiment of the present invention taken along line 16-16 in fig. 10.
Wherein, (10) (10 a) (10 b) the improved structure of the gas back pressure forming processing mould;
(20) (20 a) (20 b) a mold body; (21) (21 a) (21 b) a first mold member; (211) (211 b) a first template; (212 b) a first insert; (2121 b) closing the end face; (213 b) a first inlay; (2131 b) a first panel; (2132 b) a first recess; (21321 b) a closed side; (2133 b) a bottom side panel; (22) (22 a) (22 b) a second mold; (221) (221 b) a second template; (222) (222 b) a die hole; (23) (23 a) (23 b) a third mold member; (231) (231 b) a third template; (232 b) a second insert; (2321 b) closed end face; (233 b) a second inlay; (2331 b) a second panel; (2332 b) a second recess; (23321 b) a closed side;
(24) (24 b) a filling channel; (25 a) a fourth module; (30) (30 b) a mold chamber; (31 a) a first mold cavity; (32 a) a second mold cavity; (40) a set of air holes; (41) (41 a) (41 b) longitudinal air holes; (42) transverse air holes; (50) an air gap channel set; (51) (51 b) recessed; (52) (52 a) (52' a) (52 b) air gap passages; (60 b) a first air guide unit; (61 b) a first air gap hole; (62 b) a first plenum; (63 b) a first airway; (70 b) a second air guide unit; (71 b) a second air gap hole; (72 b) a second plenum; (73 b) a second airway; (81b) (82 b) (83 b) (81 ' b) (82 ' b) (83 ' b) material.
Detailed Description
While the preferred embodiments of the present invention have been illustrated and described with reference to the drawings, it is to be understood that the words such as first, second and third, etc., which are used in the following description and in the claims, designate identical elements, and are not intended to be limiting in any way as to the differences between the identical elements.
Referring to fig. 1 to 4, an improved structure (10) of a gas back pressure forming mold in accordance with a first preferred embodiment of the present invention mainly comprises a mold body (20), two mold chambers (30), a gas hole set (40) and a gas gap channel set (50).
The mold body (20) is a conventional multi-piece mold, in this embodiment, but not limited to, a vertical mold that performs an opening and closing operation in a gravity direction is also adopted, and generally, the mold body (20) has a first mold (21), a second mold (22) and a third mold (23) that are stacked with each other, two material injection channels (24) are respectively disposed through the first mold (21), wherein the second mold (22) as a middle mold further includes a second mold plate (221) and two mold holes (222) disposed through the second mold plate (221);
therefore, when the mold body (20) is opened, as shown in fig. 2, a first mold plate (211), a second mold plate (221) and a third mold plate (231) of the first mold (21) are moved in the gravity direction, so that the first mold plate (211), the second mold plate (221) and the third mold plate (231) are respectively positioned on different horizontal planes to achieve the purpose of opening the mold, and when the mold is closed, the first mold plate (211), the second mold plate (221) and the third mold plate (231) are sequentially overlapped up and down as shown in fig. 1, and then, the two end orifices of each mold hole (222) are respectively closed by the first mold plate (211) and the third mold plate (231), so that each mold hole (222) is respectively formed into a closed space between the first mold plate (211), the second mold plate (221) and the third mold plate (223) and is communicated with the outside of the mold body (20) only through each material injecting passage (24).
Each mold cavity (30) is formed by closing each mold hole (222), so that each mold cavity (30) is respectively arranged between the first mold (21), the second mold (22) and the third mold (23), and the space is defined by the first mold plate (211), the second mold plate (221) and the third mold plate (231).
Referring to fig. 5 and 6, the air hole set (40) has a plurality of longitudinal air holes (41) and a plurality of transverse air holes (42), wherein each longitudinal air hole (41) is formed along the hole-shaped peripheral side of each die hole (222) and is formed in a pair and coaxially penetrating through the second die plate (221) and the third die plate (231), respectively, so that when the die body (20) is located at the die-closing position as shown in fig. 1, the longitudinal air holes (41) in the pair and coaxially communicate with each other coaxially;
the transverse air holes (42) are respectively transversely arranged in the third template (231) and are used for connecting the longitudinal air holes (41) concavely arranged on the third template (231) in series, and openings are formed on the plate side of the third template (231), so that after a plurality of dispersed longitudinal air holes (41) are communicated through the transverse air holes (42) with a small number, the air holes are conveniently connected with an external pipeline, and the air supply or discharge control is facilitated.
Referring to fig. 7 to 8, the air gap channel group (50) has a plurality of recesses (51) respectively concavely formed on the upper and lower side surfaces of the second mold plate (221), and respectively extends to directly communicate with the corresponding mold holes (222) along the surface of the second mold plate (221), and simultaneously each recess (51) respectively communicates with all of the corresponding holes of the single longitudinal air holes (41), whereby when the mold body (20) is in the mold clamping state as shown in fig. 1, the notch of each recess (51) is respectively covered by the first mold plate (211) and the third mold plate (231), so that air gap channels (52) respectively communicating each mold chamber (30) with each longitudinal air hole (41) are respectively formed between the first mold plate (211) and the second mold plate (221) and between the second mold plate (221) and the third mold plate (231), and each air gap channel (52) is respectively defined by the first mold plate (211) and the second mold plate (221) or the second mold plate (221) and the second mold plate (221) at a height of 0.0 mm.
By means of the composition of the components, when the improved structure (10) of the gas back pressure forming processing mold is adopted as a forming mold in back pressure foaming forming processing manufacture by taking supercritical fluid as physical foaming agent, operators can control the gas pressure in each mold chamber (30) under the mode of clamping by adopting proper gas pressure control technology, after polymer raw materials are injected into each mold chamber (30) through each material injection channel (24) for foaming forming, the cross section shape communicated between each air gap channel (52) and each mold chamber (30) is the same as the position of a parting line, the cross section is very small in cross section and takes a narrow slit shape, therefore, the polymer raw materials formed in each mold chamber (30) penetrate into each air gap channel (52), but only the unavoidable parting line is enabled to slightly change in shape after forming, the longitudinal materials are only in the film state, the removal is easy, and the shape is enabled to be completely maintained after removing the shape, and the shape is obviously improved, and the shape of the surface of the formed molded body is obviously improved, and the surface is completely provided.
Referring to fig. 9 again, in a second preferred embodiment of the present invention, an improved structure (10 a) of a gas back pressure forming mold is provided, which avoids forming surface flaws on a molded body by reducing the air gap channels with a thin gap height, which is the same as that of the first embodiment, but different from the first embodiment in terms of how the air gap channels are formed, in the second preferred embodiment:
the first mold (21 a) of the mold body (20 a) is used as an upper mold, the second mold (22 a) is used as an upper mold core to be embedded in the first mold (21 a) and is used as a first mold cavity (31 a) defined by the upper mold core, the third mold (23 a) is used as a lower mold, the mold body (20 a) further comprises a fourth mold (25 a) used as a lower mold core, the fourth mold (25 a) is embedded in the third mold (23 a) to define a second mold cavity (32 a) between the third mold (23 a) and the fourth mold (25 a), and therefore, when the mold body (20 a) is assembled, the first mold cavity (31 a) and the second mold cavity (32 a) can be mutually grounded to form the mold chamber (30 a).
The air gap channels are recessed in the first and third mold parts (21 a, 23 a) in two different ways, one is a blind hole formed by extending the air gap channel (52 a) from the first and third mold parts (21 a, 23 a) in parallel to the hole wall of the mold hole for inserting the second and fourth mold parts (22 a, 25 a) and is partially communicated with the hole wall of the connected longitudinal air hole (41 a), and the other is a blind hole formed by extending the air gap channel (52' a) from the first and third mold parts (21 a, 23 a) perpendicularly inwards so as to be communicated with the corresponding longitudinal air hole (41 a).
Accordingly, in the second preferred embodiment, the same effects as those of the first preferred embodiment are achieved.
In summary, three kinds of descriptions are provided:
in the above embodiments, the values of the slot height of the air gap channels are merely used to illustrate the embodiments of the present invention, and further, the polymer material is formed by penetrating into each air gap channel and forming the redundant edges after forming, so that the slot height of the molded product is not limited to the above embodiments.
Secondly, in order to further increase the flow rate of the gas, or to use the redundant edge formed by the polymer material penetrating into the air gap channel as a part of the design of the surface shape of the molded body, the communication cross-sectional area between the single air gap channel and the mold cavity can be increased, for example, the plurality of recesses (51) located on the periphery of the mold hole (222) in the first preferred embodiment are connected with each other to form a single number of annular or small number of strip segments surrounding the periphery of the mold hole (222), so that the corresponding single or small number of air gap channels (52) can be formed during mold closing, and the redundant edge formed at the corresponding part of the molded body can also have continuity, or can be a constituent element of the surface shape of the molded body.
Thirdly, the slit height refers to the smallest dimension of the two spaces between the air gap channel and the mold cavity, for example, in the first preferred embodiment, the slit height corresponds to the depth of the recess (51), while in the second preferred embodiment, the slit height of the air gap channel (52 a) is also the depth of the recess, but the slit height of the air gap channel (52' a) is the smallest aperture of the blind hole, that is, the term "height" used in the present invention is not limited to the direction of gravity.
Referring to fig. 10 to 12, 14 and 15, an improved structure (10 b) of a gas back pressure forming mold according to a third preferred embodiment of the present invention further comprises a first gas guiding unit (60 b) and a second gas guiding unit (70 b) based on the mold body (20 b), the mold chamber (30 b), the air hole set and the air gap channel set similar to those of the first and second preferred embodiments.
In this embodiment, the mold body (20 b) comprises a first mold (21 b), a second mold (22 b) and a third mold (23 b) which are stacked on each other and connected to an external raw material supply device by means of three injection channels (24 b), which are similar to the conventional art, wherein:
the first mold (21 b) has a plate-shaped first mold (211 b), a first insert (212 b) is concavely arranged on the bottom plate surface of the first mold (211 b), a first inlay (213 b) having a shape approximately complementary to the first insert (212 b) is embedded in the first insert (212 b), and each injection channel (24 b) penetrates through the first mold (211 b) and the first inlay (213 b) respectively and is penetrated on the first mold (21 b).
The second mold (22 b) has a plate-shaped second mold (221 b), and a mold hole (222 b) is formed between the upper and lower surfaces of the second mold (221 b), and the upper opening corresponds to the position of the first inlay (213 b), so that the projection range of each injection channel (24 b) along the own hole axis direction is located in the hole range of the mold hole (222 b).
The third mold (23 b) has a third plate (231 b) with a second insert (232 b) recessed on the top plate of the third plate (231 b) and corresponding to the bottom opening of the hole (222 b), and a second insert (233 b) having a shape substantially complementary to the second insert (232 b) is inserted into the second insert (232).
Furthermore, the first inlay (213 b) further comprises a first panel (2131 b) having a shape similar to the space shape of the first inlay (212 b) and being complementarily embedded in the first inlay (212 b) and being attached to the closed end face (2121 b) of the first inlay (212 b) by an upper side plate surface, and a first recess (2132 b) is concavely provided on the upper side plate surface of the first panel (2131 b) so that the opening is closed by the closed end face (2121 b) of the first inlay.
The second inlay (233 b) further comprises a second panel (2331 b) shaped to conform to the shape of the space of the second inlay (232 b) and complementarily embedded in the second inlay (232 b) and attached to the closed end surface (2321 b) of the second inlay (232 b) with a bottom side plate surface, and a second recess (2332 b) is recessed in the bottom side plate surface of the second panel (2331 b) such that the opening is closed by the closed end surface (2321 b) of the second inlay.
By virtue of the above-mentioned construction of the mold body (20 b), when the first mold (21 b), the second mold (22 b) and the third mold (23 b) are mutually overlapped to form a mold-closing state, the two end openings of the mold hole (222 b) are closed by the first inlay (213 b) and the second inlay (233 b), so that the mold chamber (30 b) is defined between the first inlay (213 b), the second inlay (233 b) and the wall of the mold hole (222 b), and the three injection passages (24 b) respectively penetrate through the first mold (21 b) and communicate with the mold chamber (30 b).
The first air guide unit (60 b) is used for forming an air flow channel between the mold chamber (30 b) and the outside above the mold chamber (30 b), and comprises a first air gap hole (61 b) with two numbers, a first air collecting space (62 b) and a plurality of first air channels (63 b).
Each first air gap hole (61 b) is in a slit shape and is respectively penetrated at a part of the first inlay (213 b) between the injection channels (24 b), one end opening is positioned on the bottom side plate surface (2133 b) of the first inlay (213 b) so as to be communicated with the mold cavity (30 b) when the mold is closed, and the other end opening is positioned on the closed side (21321 b) of the first recess (2132 b) and is communicated with the concave space of the first recess (2132 b), and the first air gap hole (61 b) covers a certain range of the first inlay (213 b) and is in a serpentine shape on the bottom side plate surface (2133 b) of a part of the wall of the mold cavity (30 b) when the first inlay (213 b) is closed.
The first gas collecting space (62 b) is defined between the first recess (2132 b) and the closed end face (2121 b) of the first insert chamber (212 b), and is communicated with the other end hole of each first air gap hole (61 b).
The first air passages (63 b) are holes formed in the first mold plate (211 b) for communicating the first air collecting space (62 b) with the outside of the mold body (20 b), and are similar to the longitudinal air holes and the transverse air holes of the air hole group disclosed in the first embodiment.
The second air guide unit (70 b) is configured to form a gas flow channel between the mold chamber (30 b) and the outside below the mold chamber (30 b), and comprises a second air gap hole (71 b), a second air collecting space (72 b) and a plurality of second air passages (73 b).
The second air gap hole (71 b) is arranged on the second inlay (233 b) in a penetrating way, covers the maximum linear distance between the injection passages (24 b), enables one end opening to be communicated with the mold chamber (30 b) in a mold clamping state, and enables the other end opening to be arranged on the closing side (23321 b) of the second recess (2332 b), and enables the hole structure of the second air gap hole (71 b) to be similar to that of a long narrow slit and a winding shape of each first air gap hole (61 b).
The second plenum (72 b) is defined by the second recess (2332 b) and a closed end surface (2321 b) of the second insert chamber (232 b) and is in communication with the second air gap hole (71 b).
The second air passages (73 b) are holes formed in the third mold plate (231 b) to form passages for air flow between the second air collecting space (72 b) and the outside of the mold body (20 b), and the specific structure is similar to that of the longitudinal air holes and the transverse air holes of the air hole group disclosed in the first embodiment.
In addition, the air gap channel group is provided with two annular concave parts (51 b) which are respectively concaved on the upper side surface and the lower side surface of the second template (221 b), and one side of the air gap channel group extends along the surface of the second template (221 b) and is directly communicated with the die hole (222 b), so that an annular air gap channel (52 b) communicated with the die chamber (30 b) is formed on the periphery side of the die chamber (30 b) in the die clamping state in a similar manner to the first embodiment as shown in fig. 16.
The air hole group is provided with a plurality of longitudinal air holes (41 b) which are respectively penetrated on the first inlay (213 b) and the second inlay (233 b) and respectively communicated with the air gap channels (52 b), the first air collecting space (61 b) and the second air collecting space (72 b) in a die-closing state.
With the above components, the improved structure (10 b) of the gas back pressure forming mold is shown in fig. 13, when the external polymer material enters the mold (30 b) through the different source channels provided by the material injecting channels (24 b), the continuously entering material bodies (81 b) (82 b) (83 b) gradually expand the occupied volume in the mold (30 b) with increasing amount of the entering material, and the opposite gas existing in the mold (30 b) is compressed, except that the gas as back pressure can be discharged outwards in the circumferential direction of the mold (30 b) through the air gap channels (52 b) similar to the previous embodiment, and further flows outwards from the upper side and the lower side of the mold (30 b), so that the residual gas can not completely flow out of the air gap (61 b) due to the air gap between the gradually expanding material bodies (81 b) (82 b) (83 b) and the gradually expanding material bodies (81 b) (82 b') and the gradually expanding material bodies (82 b) due to the increasing amount of the entering material bodies, and the air gap channels (30 b) can not completely flow out through the air gap holes (61) when the air gap channels (61 b) are not completely contracted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (15)
1. An improved structure of a gas back pressure forming and molding machine is characterized by comprising:
a mold body having a first mold part and a second mold part;
a mold chamber located in the mold body and defining a space shape of at least a portion of the mold chamber with the first mold member and the second mold member;
an air hole which is arranged in the die body and is not communicated with the die chamber;
an air gap channel between the first and second modules to connect the mold chamber and the air hole, wherein the first and second modules define the gap height of the air gap channel, and the gap height of the air gap channel is smaller than the minimum aperture of the air hole;
and the concave part is concavely arranged on one side of the first module opposite to the second module or one side of the second module opposite to the first module so as to form the air gap channel when the first module and the second module are adjacent to each other.
2. The improved structure of a gas back pressure forming and molding machine according to claim 1, wherein the first mold member and the second mold member are overlapped with each other in a gravitational direction.
3. The improved structure of a gas back pressure forming die set according to claim 1, wherein the first die member and the second die member are horizontally attached to each other.
4. The improved structure of the gas back pressure forming and molding machine according to claim 1, wherein the number of the air holes is plural, and each of the air holes is communicated with the air gap passage through an orifice at one end.
5. The improved structure of a gas back pressure forming mold according to claim 4, wherein the air gap passage is formed in a ring shape communicating with the peripheral side of the mold chamber.
6. An improved structure of a gas back pressure forming processing mold is characterized by comprising:
a mold body having a first mold part and a second mold part;
a mold chamber located in the mold body and defining a space shape of at least a portion of the mold chamber with the first mold member and the second mold member;
at least two material injecting channels which are arranged on the first mould part and are communicated with the mould chamber;
a slit-like first air gap hole extending from the first mold part in a direction away from the mold part on a partial wall surface between the injection passages in a wall surface of the first mold part defining a side wall of the mold part;
the first gas collecting space is defined by the die body, is positioned in the die body, is independent of the die chamber and the outside of the material injection channel, and is communicated with the first gas gap hole;
the first air passage is arranged on the die body and is communicated with the first gas collecting space and the outside of the die body;
by means of the communication among the first air gap hole, the first air collecting space and the first air channel, a flow channel of air between the mold cavity and the outside of the mold body is provided.
7. The improved structure of a gas back pressure forming die as defined in claim 6, wherein said first air gap hole is serpentine on said partial wall surface.
8. The improved structure of a gas back pressure forming die as defined in claim 6 or 7, wherein the first air gap is between each of the injection channels.
9. The improved structure of a gas back pressure forming mold according to claim 6, wherein the first mold part further comprises:
a first template;
the first embedding chamber is concavely arranged on one side surface of the first template;
the first inlay is complementarily embedded in the embedded chamber, and one side of the first inlay, which is positioned in the first embedded chamber, is separated from the closed end surface of the first embedded chamber, so as to define the first gas collecting space, and the first air gap hole is penetrated on the first inlay.
10. The improved structure of claim 9, wherein the first inlay further comprises a first panel complementarily embedded in the first embedded chamber and attached to the closed end surface of the first embedded chamber by a side surface, and a first recess is concavely arranged on the side surface of the first panel and is covered by the closed end surface of the first embedded chamber, so that the first gas collecting space is defined between the first recess and the closed end surface of the first embedded chamber.
11. The improved structure of a gas back pressure forming die according to claim 9 or 10, wherein each of the injection channels is formed through the first inlay.
12. The improved structure of gas back pressure forming die set forth in claim 10, wherein said first air gap hole is formed through said first panel with one end opening on said first concave closed side.
13. The improved structure of a gas back pressure forming mold according to claim 9, wherein the mold body further comprises a third mold member, and the second mold member is interposed between the first mold member and the third mold member.
14. The improved structure of claim 13, wherein the second mold part has a plate-shaped second mold plate, and a mold hole is formed through the second mold plate, and the mold chamber is defined by the first mold part and the third mold part closing both ends of the mold hole.
15. The improved structure of a gas back pressure forming die set according to claim 14, wherein the third mold member further comprises:
a third template;
the second embedding chamber is concavely arranged on one side surface of the third template opposite to the second mould part and corresponds to the orifice of the mould hole;
a second inlay which is complementarily embedded in the second embedding chamber and is opposite to the die hole by one side surface;
a second gas collecting space defined between the other side of the second inlay and the closed end face of the second inlay chamber;
a slit-shaped second air gap hole penetrating the second inlay and having one end opening communicating with the second gas collecting space and the other end opening communicating with the mold chamber;
and the second air passage is arranged in the third mould part and is communicated with the second gas collecting space.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020103933129 | 2020-05-11 | ||
| CN202010393312 | 2020-05-11 | ||
| CN2020207701516 | 2020-05-11 | ||
| CN202020770151 | 2020-05-11 |
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| CN113635512A CN113635512A (en) | 2021-11-12 |
| CN113635512B true CN113635512B (en) | 2023-09-08 |
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| CN202011308900.4A Active CN113635512B (en) | 2020-05-11 | 2020-11-20 | Improved structure of gas back pressure forming processing mould |
| CN202022714511.3U Withdrawn - After Issue CN214447961U (en) | 2020-05-11 | 2020-11-20 | Improved structure of gas back pressure forming processing mould |
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| CN202022714511.3U Withdrawn - After Issue CN214447961U (en) | 2020-05-11 | 2020-11-20 | Improved structure of gas back pressure forming processing mould |
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| CN113635512B (en) * | 2020-05-11 | 2023-09-08 | 钜钢机械股份有限公司 | Improved structure of gas back pressure forming processing mould |
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- 2020-11-20 CN CN202011308900.4A patent/CN113635512B/en active Active
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| GB9316959D0 (en) * | 1993-08-14 | 1993-09-29 | Ford Motor Co | Manufacture of foamed seat pads |
| JP2005053127A (en) * | 2003-08-06 | 2005-03-03 | Mazda Motor Corp | Degassing structure of injection molding machine |
| JP2008260245A (en) * | 2007-04-13 | 2008-10-30 | Sekisui Chem Co Ltd | Injection molding die and method of manufacturing foamed molding using it |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113635512A (en) | 2021-11-12 |
| CN214447961U (en) | 2021-10-22 |
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