CN117564218A - Lost foam mould - Google Patents
Lost foam mould Download PDFInfo
- Publication number
- CN117564218A CN117564218A CN202410051070.3A CN202410051070A CN117564218A CN 117564218 A CN117564218 A CN 117564218A CN 202410051070 A CN202410051070 A CN 202410051070A CN 117564218 A CN117564218 A CN 117564218A
- Authority
- CN
- China
- Prior art keywords
- box body
- lost foam
- lower box
- piston tube
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000006260 foam Substances 0.000 title claims abstract description 37
- 239000002245 particle Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000221696 Sclerotinia sclerotiorum Species 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 235000002245 Penicillium camembertii Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
- B22C7/023—Patterns made from expanded plastic materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a lost foam mould which comprises a closed upper box body capable of moving vertically, wherein a concave upper mould is arranged on the bottom surface of the upper box body; the upper surface of the lower box body is provided with a convex lower die, the lower die is of a shell structure with an open bottom, the lower die is formed by enclosing a middle part and two side parts arranged on two sides of the middle part, and one surface of the side part far away from the middle part is provided with a transverse bulge; the two side parts can be mutually close to or far away from each other, and the middle part can vertically move relative to the lower box body and pass through the opening; and a cavity is formed between the upper die and the lower die after the bottom surface of the upper box body is buckled with the top surface of the lower box body. According to the lost foam mould, the lower mould capable of changing the gesture is used, so that the lost foam mould is more convenient to demould, and the bulge does not need to be manually disassembled.
Description
Technical Field
The invention relates to the technical field of molds, in particular to a lost foam mold.
Background
The lost foam, namely the foam white mold, is prepared by feeding foam particles into a cavity of a mold through a switchable feed pipe, heating the cavity to expand and mold the foam particles, cooling the cavity and demolding;
the cavity is generally formed by buckling an upper die and a lower die, the lower die is of a convex structure, the upper die is of a groove-shaped structure, and due to different customer requirements, the outer surface of the lower die is sometimes provided with bulges which are generally detachably assembled on the outer surface of the lower die;
when demoulding, the upper mould is required to be lifted to expose the foam plastic white mould, then the white mould and the bulge are taken down from the lower mould together, then the bulge is taken out from the white mould, and then the bulge is required to be reinstalled on the lower mould, so that the mould can be carried out again, and the use is more troublesome.
Disclosure of Invention
In order to solve the problems in the above-mentioned technology, a lost foam mold comprises:
a vertically movable airtight upper box body, wherein a concave upper die is arranged on the bottom surface of the upper box body;
the upper surface of the lower box body is provided with a raised lower die, the lower die is of a shell structure with an open bottom, the lower die is formed by enclosing a middle part and two side parts arranged on two sides of the middle part, and one surface of the side part far away from the middle part is provided with a transverse protrusion;
the two side parts can be mutually close to or far away from each other, and the middle part can vertically move relative to the lower box body and pass through the opening;
and a cavity is formed between the upper die and the lower die after the bottom surface of the upper box body is buckled with the top surface of the lower box body.
The bottom of the lower box body is open, a bottom plate is arranged at the bottom of the lower box body, a supporting plate is arranged at the outer edge of the bottom plate, a supporting rod is fixedly arranged on the top surface of the bottom plate, and the top end of the supporting rod is fixedly connected with the bottom surface of the middle part;
the side wall of the lower box body is provided with a vertical cylinder, and the tail end of a piston rod of the vertical cylinder is fixedly connected with the supporting plate.
The side part of the lower box body is provided with a plurality of lateral air cylinders, the lateral air cylinders are arranged on the outer side wall of the lower box body, the piston rods of the lateral air cylinders extend into the lower box body, and the tail ends of the piston rods of the lateral air cylinders are fixedly connected with the lateral parts respectively.
Wherein, the die cavity inner wall sets up a plurality of gas pockets, and a plurality of the gas pocket all communicates with the airtight container of elasticity.
Wherein, at least one gas pocket is located the upper die top.
A piston tube is arranged in the air hole, one end of the piston tube, which faces the inside of the cavity, is closed, and a plurality of through holes are formed in the side wall of the piston tube;
the air hole is internally and fixedly provided with an annular plate, and the opening end of the piston tube is connected with the annular plate through a spring;
when the spring is in a non-stressed state, the through hole is positioned outside the air hole.
The end face of the opening end of the piston tube is fixedly provided with a coaxial sleeve, the sleeve is positioned inside the air hole and sleeved outside the spring, and the sum of the lengths of the sleeve and the piston tube is equal to the length from the annular plate to the inner end of the air hole.
The beneficial effects of the invention are as follows: according to the lost foam mould, the lower mould capable of changing the gesture is used, so that the lost foam mould is more convenient to demould, and the bulge does not need to be manually disassembled.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a block diagram of the present invention;
FIG. 3 is a block diagram of another view of the present invention;
FIG. 4 is a schematic view of the lowered state of the middle part of the present invention;
FIG. 5 is a schematic view showing the internal structure of the air hole of the present invention;
FIG. 6 is a schematic illustration of a side portion of the present invention;
fig. 7 is a cross-sectional view of the side of the present invention.
Description of the reference numerals
1. The upper box body, 11, the upper die, 2, the lower box body, 21, the vertical cylinder, 22, the horizontal cylinder, 23, the cross rod, 24, the vertical rod, 25, the opening, 3, the lower die, 31, the middle part, 32, the side part, 321, the bulge, 4, the bottom plate, 41, the supporting plate, 42, the supporting rod, 5, the air hole, 51, the piston tube, 52, the through hole, 53, the spring, 54, the annular plate, 55, the sleeve, 6, the guide rod, 7 and the channel.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 4, a lost foam mold provided for an embodiment includes:
the upper box body 1 is vertically movable and airtight, an upper cover of the upper box body 1 is not shown in the drawing so as to display the internal structure of the upper box body 1, and an upper die 11 which is upwards recessed is arranged on the bottom surface of the upper box body 1;
the lower box body 2, the top surface of the lower box body 2 is provided with an opening 25, the upper surface of the lower box body 2 is provided with a convex lower die 3, the lower die 3 is of a shell structure with an open bottom as a whole, the lower die 3 is surrounded by a middle part 31 (an arc plate structure in the embodiment) and two side parts 32 (two side plates in the embodiment) arranged on two sides of the middle part 31, and one surface of the side part 32 far away from the middle part 31 is provided with a transverse convex 321;
the two side portions 32 can be moved closer to or further away from each other, and the middle portion 31 can be moved vertically relative to the lower case 2 and pass through the opening 25;
and a cavity is formed between the upper die 11 and the lower die 3 after the bottom surface of the upper box body 1 is buckled with the top surface of the lower box body 2.
When in use, as in the background technology, foam raw material particles are pumped into a cavity, the cavity is heated to expand the raw material particles to form a lost foam, the protrusions 321 correspond to concave holes on the inner side wall of the lost foam, after the cavity is cooled, the upper box 1 is lifted under the guidance of the guide rod 6, then the middle part 31 is lowered compared with the lower box 2 and the two side parts 32 as shown in fig. 4, the two side parts 32 are closed, the protrusions 321 are pulled out of the concave holes on the inner side wall of the lost foam, the lost foam can be directly taken down, then the middle part 31 and the side parts 32 are reset to the state of fig. 1, and sealing strips, such as heat-resistant rubber sealing strips, are arranged at adjacent positions of the middle part 31, the side parts 32 and the openings 25.
Specifically, the bottom of the lower box body 2 is opened, the bottom of the lower box body 2 is provided with a bottom plate 4, the outer edge of the bottom plate 4 is provided with a plurality of support plates 41, the top surface of the bottom plate 4 is fixedly provided with a support rod 42, and the top end of the support rod 42 is fixedly connected with the bottom surface of the middle part 31;
the side wall of the lower box body 2 is provided with a plurality of vertical cylinders 21, and the tail ends of piston rods of the vertical cylinders 21 are fixedly connected with a supporting plate 41, so that the lower box body 2 can be lifted compared with the bottom plate 4 through the movement of the vertical cylinders 21, namely, the action that the middle part 31 downwards passes through the opening 25 is completed.
Further, two horizontal air cylinders 22 are arranged on the outer side wall of the lower box body 2, piston rods of the horizontal air cylinders 22 extend into the lower box body 2, tail ends of the piston rods of the two horizontal air cylinders 22 are fixedly connected with the two side portions 32 respectively, and the side portions 32 are driven by the piston rods of the horizontal air cylinders 22 to realize mutual moving away from or approaching to each other.
Further, as shown in fig. 1 to 5, the inner wall of the cavity is provided with a plurality of air holes 5, the plurality of air holes 5 are all communicated with an elastic airtight container, in this embodiment, the elastic container can be an elastic rubber container, the plurality of air holes 5 are communicated with the top of the container through flexible air pipes which can be bent, so that each part can keep ventilation smooth with the container during movement, as shown in fig. 6 and 7, for the air holes 5 on the side part 32, a vertical channel 7 is arranged inside the side part 32, one end of the air hole 5 away from the surface of the corresponding side part 32 is communicated with the channel 7, and the flexible air pipes which can be bent are communicated with the other end of the channel 7.
Wherein at least one air hole 5 is located at the top of the upper mold 11.
Further, as shown in fig. 5, a piston tube 51 is disposed in the air hole 5, one end of the piston tube 51 facing the inside of the cavity is closed, and a plurality of through holes 52 are disposed on the side wall of the piston tube 51;
an annular plate 54 is fixedly arranged in the air hole 5, and the opening end of the piston tube 51 is connected with the annular plate 54 through a spring 53;
when the spring 53 is in a non-stressed state, the piston tube 51 is ejected to the inside of the cavity, so that the through hole 52 is just positioned outside the air hole 5.
The end face of the opening end of the piston tube 51 is fixedly provided with a coaxial sleeve 55, the sleeve 55 is positioned in the air hole 5 and sleeved outside the spring 53, and the sum of the lengths of the sleeve 55 and the piston tube 51 is equal to the length from the top face of the annular plate 54 to one end of the air hole 5 positioned on the surface of the cavity.
When the foam plastic particles in the cavity are heated, the space in the cavity is extruded along with the expansion of the particles, the gas in the cavity is forced to enter the elastic container after passing through the through hole 52, the air hole 5 and the hose on the piston tube 51 in sequence, the air pressure in the elastic container is increased along with the expansion of the particles, the piston tube 51 is extruded along with the expansion of the volume in the gradual forming process of the lost foam, the piston tube 51 is pressed into the air hole 5, the end surface of the closed end of the piston tube 51 and the surrounding cavity surface form a plane under the support of the sleeve 55, the surface air hole 5 is prevented from leaving marks on the surface of the lost foam, the through hole 52 immersed in the air hole 5 is closed until the lost foam is completely formed, and all the piston tubes 51 are pressed into the corresponding air holes 5;
and then the cavity is cooled, the volume of the lost foam is slightly contracted during cooling, and the piston tube 51 is slightly jacked up due to the elasticity of the spring 53 and the pressure of the air pressure in the elastic container, namely, the lost foam at the position of the air hole 5 is jacked up firstly, so that a gap is formed between the lost foam at the position and the surface of the cavity, the through hole 52 is pushed into the cavity, the elastic container contracts, the air spreads along the gap through the through hole 52, the separation of the lost foam and the surface of the cavity is accelerated, and the demolding speed is accelerated.
It should be noted that, for heating the cavity, a pipeline may be provided on the surface of the upper mold 11 and the bottom surface of the middle portion 31, and cooling and heating may be performed by introducing steam and condensed water, in addition, the foam particles may adhere to 3-5% of water by volume on the outer surface thereof by spraying before pumping into the cavity, so that heat conduction is facilitated, if less water adheres, the time for expansion molding of the lost foam may be increased, and if too much water may cause the gas to spread in the gap during cooling to be blocked.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (7)
1. The lost foam mold is characterized by comprising
A vertically movable airtight upper box body, wherein a concave upper die is arranged on the bottom surface of the upper box body;
the upper surface of the lower box body is provided with a raised lower die, the lower die is of a shell structure with an open bottom, the lower die is formed by enclosing a middle part and two side parts arranged on two sides of the middle part, and one surface of the side part far away from the middle part is provided with a transverse protrusion;
the two side parts can be mutually close to or far away from each other, and the middle part can vertically move relative to the lower box body and pass through the opening;
and a cavity is formed between the upper die and the lower die after the bottom surface of the upper box body is buckled with the top surface of the lower box body.
2. The lost foam mould according to claim 1, wherein the bottom of the lower box body is open, a bottom plate is arranged at the bottom of the lower box body, a supporting plate is arranged at the outer edge of the bottom plate, a supporting rod is fixedly arranged on the top surface of the bottom plate, and the top end of the supporting rod is fixedly connected with the bottom surface of the middle part;
the side wall of the lower box body is provided with a vertical cylinder, and the tail end of a piston rod of the vertical cylinder is fixedly connected with the supporting plate.
3. The lost foam mould according to claim 1, wherein two horizontal air cylinders are arranged on the outer side wall of the lower box body, piston rods of the horizontal air cylinders extend into the lower box body, and tail ends of the piston rods of the two horizontal air cylinders are fixedly connected with the two side parts respectively.
4. A lost foam mould according to any one of claims 1 to 3, wherein the inner wall of the mould cavity is provided with a plurality of air holes, and a plurality of the air holes are communicated with the elastic airtight container.
5. A lost foam mould according to claim 4, wherein at least one of the air holes is located at the top of the upper mould.
6. A lost foam mould according to claim 5, wherein a piston tube is arranged in the air hole, one end of the piston tube facing the inside of the cavity is closed, and a plurality of through holes are arranged on the side wall of the piston tube;
the air hole is internally and fixedly provided with an annular plate, and the opening end of the piston tube is connected with the annular plate through a spring;
when the spring is in a non-stressed state, the through hole is positioned outside the air hole.
7. A lost foam mould according to claim 6, wherein the end face of the open end of the piston tube is fixedly provided with a coaxial sleeve, the sleeve is located inside the air hole and sleeved outside the spring, and the sum of the lengths of the sleeve and the piston tube is equal to the length from the annular plate to the inner end of the air hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410051070.3A CN117564218B (en) | 2024-01-15 | 2024-01-15 | Lost foam mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410051070.3A CN117564218B (en) | 2024-01-15 | 2024-01-15 | Lost foam mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117564218A true CN117564218A (en) | 2024-02-20 |
| CN117564218B CN117564218B (en) | 2024-03-19 |
Family
ID=89892049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410051070.3A Active CN117564218B (en) | 2024-01-15 | 2024-01-15 | Lost foam mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117564218B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005273439A (en) * | 2004-02-26 | 2005-10-06 | Kubota Corp | Excavating bit |
| JP4553271B1 (en) * | 2009-12-24 | 2010-09-29 | 株式会社古久根 | Casting method and reticulated disappearance model |
| CN102784881A (en) * | 2012-08-24 | 2012-11-21 | 洛阳刘氏模具有限公司 | Lost-foam mold for gate valve bodies |
| US20180133783A1 (en) * | 2016-11-15 | 2018-05-17 | Georg Fischer Gmbh | Production method using a vacuum sand casting mould |
| CN109759544A (en) * | 2019-03-26 | 2019-05-17 | 洛阳刘氏模具有限公司 | The automatic core-pulling mechanism of single cylinder engine inner cavity loose piece |
| CN210632894U (en) * | 2019-09-17 | 2020-05-29 | 洛阳刘氏模具有限公司 | Inner-buckled gate valve body lost foam mould |
| CN111922284A (en) * | 2020-07-29 | 2020-11-13 | 陶安 | Duplex evaporative die casting aluminum process |
| CN112605337A (en) * | 2020-11-15 | 2021-04-06 | 浙大城市学院 | Forming method of tensile sample EPS foam model |
| CN112828247A (en) * | 2020-12-30 | 2021-05-25 | 临安英明机械配件有限公司 | Machining process and machining die for balancing weight |
| CN216297898U (en) * | 2021-05-13 | 2022-04-15 | 绍兴市园方标准件有限公司 | Full-automatic multi-station wax injection machine for low-temperature wax |
| CN218134791U (en) * | 2021-10-10 | 2022-12-27 | 甘肃酒钢集团西部重工股份有限公司 | Assembled casting mold for producing heat insulation pad at end part of sintering machine |
| CN116140545A (en) * | 2022-09-10 | 2023-05-23 | 河北代氏科技有限公司 | Lost foam mold convenient to separate and working method thereof |
-
2024
- 2024-01-15 CN CN202410051070.3A patent/CN117564218B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005273439A (en) * | 2004-02-26 | 2005-10-06 | Kubota Corp | Excavating bit |
| JP4553271B1 (en) * | 2009-12-24 | 2010-09-29 | 株式会社古久根 | Casting method and reticulated disappearance model |
| CN102784881A (en) * | 2012-08-24 | 2012-11-21 | 洛阳刘氏模具有限公司 | Lost-foam mold for gate valve bodies |
| US20180133783A1 (en) * | 2016-11-15 | 2018-05-17 | Georg Fischer Gmbh | Production method using a vacuum sand casting mould |
| CN109759544A (en) * | 2019-03-26 | 2019-05-17 | 洛阳刘氏模具有限公司 | The automatic core-pulling mechanism of single cylinder engine inner cavity loose piece |
| CN210632894U (en) * | 2019-09-17 | 2020-05-29 | 洛阳刘氏模具有限公司 | Inner-buckled gate valve body lost foam mould |
| CN111922284A (en) * | 2020-07-29 | 2020-11-13 | 陶安 | Duplex evaporative die casting aluminum process |
| CN112605337A (en) * | 2020-11-15 | 2021-04-06 | 浙大城市学院 | Forming method of tensile sample EPS foam model |
| CN112828247A (en) * | 2020-12-30 | 2021-05-25 | 临安英明机械配件有限公司 | Machining process and machining die for balancing weight |
| CN216297898U (en) * | 2021-05-13 | 2022-04-15 | 绍兴市园方标准件有限公司 | Full-automatic multi-station wax injection machine for low-temperature wax |
| CN218134791U (en) * | 2021-10-10 | 2022-12-27 | 甘肃酒钢集团西部重工股份有限公司 | Assembled casting mold for producing heat insulation pad at end part of sintering machine |
| CN116140545A (en) * | 2022-09-10 | 2023-05-23 | 河北代氏科技有限公司 | Lost foam mold convenient to separate and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117564218B (en) | 2024-03-19 |
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