Casting mold for flat plate or flat plate with single-side reinforcing rib

Abstract

The utility model discloses a casting die for a flat plate or a flat plate with a single-sided reinforcing rib, which is provided with an upper die consisting of an upper die positioning plate and a plurality of upper die moving plates, a lower die consisting of a flat plate and a peripheral fence, and a driving mechanism is used for driving the upper die moving plates to expand outwards and be attached to the inner side edge of the lower die inner fence, so that a side edge gap between the upper die and the lower die is eliminated; therefore, the overflow edge formed between the upper die and the lower die of the casting is eliminated, the casting without the overflow edge can be freely shrunk when the casting is shrunk, shrinkage resistance caused by the overflow edge is avoided, and casting cracks caused by the shrinkage resistance are eliminated.

Description

Technical Field

[0001] The utility model relates to a casting mold, in particular to a casting mold for a flat plate or a flat plate with a single-sided reinforcing rib. Background Art

[0002] Currently, sand casting is used for metal castings of flat plates and flat plates with single-sided reinforcing ribs. Due to the thin walls and large areas, the runner has to be made very large to meet the requirement of full pouring. With open pouring and the upper mold closing downward, the side gap between the upper and lower molds will cause overflow edges around the upper mold periphery of the casting. When the casting shrinks, the overflow edges will prevent the casting from shrinking, resulting in casting cracks. Summary of the Utility Model

[0003] In order to solve the above problems, the utility model provides a casting mold for a flat plate or a flat plate with a single-sided reinforcing rib, which can effectively solve the deficiencies in the prior art.

[0004] The utility model is realized through the following technical solutions: It consists of a lower mold and an upper mold. The lower mold is composed of a flat plate and a peripheral enclosure. The upper mold is composed of an upper mold positioning plate and two or more upper mold moving plates. The upper surface of the upper mold moving plate is in contact with the upper mold positioning plate, and the lower surface is in contact with the casting. The periphery of the upper mold moving plate is divided into the outer side edge of the upper mold moving plate and the gap surface between the moving plates. There is a vertical elastic fitting device or gap control device between the upper mold positioning plate and the upper mold moving plate, enabling the upper mold moving plate to move freely horizontally relative to the upper mold positioning plate. The upper mold moving plate has a driving mechanism that can drive the upper mold moving plate to expand outward so that the outer side edge of the upper mold moving plate is in contact with the inner side edge of the lower mold retaining edge or move in the opposite direction to reset.

[0005] As a preferred technical solution: The upper mold moving plates are distributed in a 4-piece pattern.

[0006] As a preferred technical solution: The upper mold moving plates are distributed in a two-piece diagonal pattern.

[0007] As a preferred technical solution: The elastic fitting device between the upper mold positioning plate and the upper mold moving plate is that there is a spring between the bolt flange fixed on the upper mold fixed plate and the upper mold fixing plate.

[0008] As a preferred technical solution: The gap control between the upper mold positioning plate and the upper mold moving plate is that there is a gap between the positioning pins in the vertical direction of the positioning plate and the fixed flange surface of the upper mold fixed plate and the upper mold positioning flange plane.

[0009] As a preferred technical solution: The driving mechanism of the upper mold moving plate relative to the upper mold positioning plate is cam driving, with spring reset or spring driving with cam reset.

[0010] As a preferred technical solution: on the upper die positioning plate, there is an inclined plane of the upper die positioning plate and the inner side edge of the lower die stop form an inclined wedge space. There is an exposed gap between the moving plates that covers the inclined wedge and moves within this inclined wedge space. When the inner side of the inclined wedge contacts the inclined plane of the upper die positioning plate and the inner side edge of the lower die stop respectively, the inclined wedge blocks the gap between the two upper die moving plates that cannot be covered by the upper die positioning plate.

[0011] As a preferred technical solution: when the casting is a single-sided ribbed flat plate, several die cores are placed on the bottom plane of the lower die.

[0012] The beneficial effects of the present utility model are as follows: an upper die composed of an upper die positioning plate and several upper die moving plates is provided. The lower die is composed of a flat plate and a peripheral enclosure. There is a driving mechanism to drive the upper die moving plates to expand outwards and fit with the inner side edge of the inner wall of the lower die, eliminating the side gap between the upper and lower dies. Furthermore, the flash formed between the upper and lower die gaps for the casting is eliminated. When the casting shrinks, the casting without flash can freely shrink, avoiding the shrinkage resistance caused by the flash and eliminating the casting cracks caused thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a side view of the casting mold for flat plate castings of the present utility model;

[0015] Figure 2 It is a top view of the casting mold for flat plate castings of the present utility model;

[0016] Figure 3 It is a schematic diagram of the outward expansion of the upper die moving plate of the present utility model;

[0017] Figure 4 It is a side view of the termination of the outward expansion of the upper die moving plate of the present utility model;

[0018] Figure 5 It is a top view of the termination of the outward expansion of the upper die moving plate of the present utility model;

[0019] Figure 6 It is a schematic diagram of the upper and lower dies and the mold after the expansion of the upper die moving plate of the present utility model;

[0020] Figure 7 It is a schematic diagram of the vertical elastic positioning relationship between the upper die positioning plate and the upper die moving plate of the present utility model;

[0021] Figure 8Top view of the expansion and contraction relationship between the upper die positioning plate and the upper die moving plate of the present utility model;

[0022] Figure 9 Side view of the cam drive of the upper die moving plate of the present utility model;

[0023] Figure 10 Top view of the cam drive of the upper die moving plate of the present utility model;

[0024] Figure 11 Schematic diagram of the inner edge slope of the four-piece upper die moving plate of the present utility model;

[0025] Figure 12 Schematic diagram of the casting rib between the four-piece upper die moving plates of the present utility model;

[0026] Figure 13 Side view of the casting rib between the flat plate with grid stiffeners and the moving plate of the present utility model;

[0027] Figure 14 Top view of the casting rib between the flat plate with grid stiffeners and the moving plate of the present utility model;

[0028] Figure 15 Top view of the installation of the wedge for covering the exposed gap between the moving plates of the present utility model;

[0029] Figure 16 Side view of the installation of the wedge for covering the exposed gap between the moving plates of the present utility model;

[0030] Figure 17 Schematic diagram of the wedge for covering the exposed gap between the moving plates of the present utility model;

[0031] Figure 18 Schematic diagram before the expansion of the diagonally divided moving plate of the present utility model;

[0032] Figure 19 Schematic diagram after the expansion of the diagonally divided moving plate of the present utility model;

[0033] Figure 20 Schematic diagram of the casting mold for the flat plate with stiffeners of the present utility model.

[0034] Explanation of reference numerals:

[0035] 1. Lower die; 101. Inner side of the lower die rib; 102. Bottom plane of the lower die; 103. Reinforcing rib die core; 2. Upper die; 201. Upper die positioning plate; 202. Upper die moving plate; 2011. Hypotenuse of the upper die fixed plate; 2012. Through slot of the positioning plate; 2021. Outer side of the upper die moving plate; 2022. Inner hypotenuse of the upper die moving plate; 203. Gap surface between the moving plates; 2031. Casting rib between the inner hypotenuses of the upper die moving plates; 204. Connecting screw between the fixed and moving plates; 205. Compression spring between the fixed and moving plates; 206. Column for bearing the elastic force of the moving plate; 207. Return cam of the moving plate; 208. Expansion spring of the moving plate; 209. Vertical positioning pin between the fixed and moving plates; 210. Column for bearing the expansion and contraction of the moving plate; 211. Camshaft; 212. Expansion cam of the moving plate; 213. Wedge for covering the exposed gap between the moving plates; 214. Wedge pressure plate; 2023. Diagonally divided moving plate; 3. Molten metal; 301. Flat casting with grid-shaped reinforcing ribs; 4. Casting ejector rod; 5. Ejection bracket. Detailed implementation mode

[0036] All features disclosed in this specification, or all steps in the disclosed methods or processes, except for mutually exclusive features and / or steps, can be combined in any way.

[0037] Any feature disclosed in this specification (including any additional claims, abstract, and drawings), unless specifically stated, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0038] Embodiment 1

[0039] As Figures 1 - 6 shown, Figure 1 the lower die 1 in Figure 1 is a flat plate with a peripheral fence, having a bottom plane 102 of the lower die and an inner side 101 of the lower die rib. The upper die 2 has an upper die positioning plate 201 and an upper die moving plate 202. There are 4 upper die moving plates 202 corresponding to the four corners of the lower die 1 respectively. The upper die moving plate 202 has an outer side 2021 of the upper die moving plate. When in the state as Figure 1 the upper die moving plate 202 retracts, the outer side 2021 of the upper die moving plate and the inner side 101 of the lower die rib do not contact. After the molten metal 3 is poured into the lower die 1, the upper die 2 is lowered by the lifting system to the Figure 1 position, and the top view is as Figure 2 shown. Then the upper die moving plate 202 moves in the direction of the arrow in Figure 3 until the outer side 2021 of the upper die moving plate on the side of each upper die moving plate 202 fits with the inner side 101 of the lower die rib. At this time, the side view is as Figure 4 shown, and the top view with the upper die positioning plate 201 is as Figure 5 shown. After the expansion of the upper die moving plate 202 is completed, the upper die 2 descends to close the die with the lower die 1. At this time, asFigure 6 As shown, after mold clamping, pressure can continue to be applied above the upper mold 2 to solidify the molten metal 3 under pressure, or vibration force can be applied to the upper mold 2 or the lower mold 1 to solidify the molten metal 3 under the action of the vibration force. There is a positioning device in the height direction between the upper mold positioning plate 201 and the upper mold moving plate 202, such as Figure 7 As shown, there are screw holes on the upper mold moving plate 202 and light holes on the upper mold positioning plate 201. There is a fixed and moving plate connecting screw 204 screwed into the screw hole of the upper mold moving plate 202. There is a spring fixed and moving plate connecting screw 204 between the end face flange plane of the fixed and moving plate connecting screw 204 and the plane of the upper mold positioning plate 201, so that the upper mold positioning plate 201 and the upper mold moving plate 202 are elastically attached. There is also such as Figure 9 As shown, the fixed and moving plate vertical positioning pin 209 is fixed on the upper mold moving plate 202, and the end flange plane corresponds to the upper plane of the upper mold positioning plate 201, and there is a gap of 0.01 - 0.2 mm so that the upper mold positioning plate 201 and the upper mold moving plate 202 can move relative to each other in the horizontal direction. There is also a device on the upper mold moving plate 202 between the upper mold positioning plate 201 and the upper mold moving plate 202 to make the upper mold moving plate 202 move in the reverse direction of the arrow in Figure 3 , such as Figure 7 and Figure 8 As shown Figure 7 There is a moving plate elastic force bearing column 206 integrated with the upper mold moving plate 202 in Figure 8 As shown in the top view of this device, there is a fixed and moving plate pressing spring 205 to push the upper mold moving plate 202 towards the moving plate reset cam direction. When the upper mold moving plate 202 needs to expand outwards, rotate the moving plate reset cam 207 to the short side ( Figure 8 is the long side aligned with the spring in Figure 8 ) to align with the moving plate expansion spring 208 and rotate 90°. The moving plate elastic force bearing column 206 drives the upper mold moving plate 202 to move in the direction of the arrow in Figure 3 until the outer side edge 2021 of the upper mold moving plate is attached to the upper mold positioning plate 201. When the upper mold moving plate 202 needs to move back, just rotate the rotating moving plate reset cam 207 to the position in Figure 8 to make the upper mold moving plate 202 contract, so that the upper mold moving plate 202 translates relative to the upper mold positioning plate 201. There is also a scheme such as Figure 9 and Figure 10As shown, several movable plate expansion and contraction load-bearing columns 210 are fixed on the upper mold movable plate 202. Each upper mold positioning plate 201 corresponds to a camshaft 211 and a movable plate expansion cam 212. The camshaft 211 rotates vertically and synchronously with the movable plate expansion cam 212, which can push the movable plate expansion and contraction load-bearing column 210 to drive the upper mold movable plate 202 to translate. There is a return spring (not shown in the figure) that pulls the movable plate expansion and contraction load-bearing column 210 inward. When the movable plate expansion cam 212 rotates to the short side, the upper mold movable plate 202 automatically retracts. The inner hypotenuse 2022 of the upper mold movable plate of the four upper mold movable plates 202 is Figure 11 The slope in makes the casting rib 2031 between the inner hypotenuses of the upper mold movable plates formed in the space between the inner sides of the gap surfaces 203 of the four movable plates, as Figure 12 shown. When the casting shrinks inward, the inner hypotenuse 2022 of the upper mold movable plate will not block the shrinkage of the casting rib. Figures 7 - 10 On the upper part of the camshaft 211 in, a sprocket can be installed, and then each sprocket is driven to rotate by a unified chain.

[0040] Embodiment 2

[0041] Different from Embodiment 1, there is a wedge 213 covering the exposed gap between the movable plates, as Figures 15 - 17 shown. There is an upper mold fixed plate hypotenuse 2011 on the upper mold positioning plate 201, at the position of the gap opposite to the two upper mold movable plates 202. The upper mold fixed plate hypotenuse 2011 and the inner side of the lower mold stop edge 101 form a wedge space. The wedge 213 covering the exposed gap between the movable plates can move in this space. When the upper mold movable plate 202 expands outward, the wedge 213 covering the exposed gap between the movable plates moves in the direction of the arrow in Figure 15 , so that the two sides of the wedge 213 covering the exposed gap between the movable plates are respectively in contact with the upper mold fixed plate hypotenuse 2011 and the inner side of the lower mold stop edge 101, covering the exposed gap (the part not covered by the upper mold positioning plate 201) between the two upper mold movable plates 202. Figure 16 The wedge pressure plate 214 in is relatively fixed to the upper mold positioning plate 201 to position the wedge 213 covering the exposed gap between the movable plates in the vertical direction.

[0042] Embodiment 3

[0043] Different from Embodiment 1, the upper mold movable plate 202 is divided diagonally into two diagonal split movable plates 2023, and the moving and fitting direction is as shown by the arrow in Figure 18 , Figure 19 is the top view of the state after the diagonal split movable plate 2023 is in contact with the movable plate expansion and contraction load-bearing column 210.

[0044] Embodiment 4

[0045] Different from Embodiment 1, as Figure 20As shown, the casting is a flat plate with ribs. The flat side of the flat plate contacts the upper die 2, and the side with ribs faces downward. There are several rib cores 103 that fit with the bottom plane 102 of the lower die. At the same time, there are casting ejector rods 4 and ejector brackets 5. The completed drawing of the casting is as shown in Figure 13.

[0046] Embodiment 5

[0047] On the basis of the above embodiments, an upward pressure device is added to the upper die to press the upper die 2 downward to tightly compress the casting. The pressure device can be the direct pressure generated by a hydraulic cylinder, or the intermittent force generated by a pneumatic pick impacting the upper die, or the vibrating force generated by a vibrator.

[0048] Embodiment 6

[0049] Different from Embodiment 5, a vibrator is installed on the lower die 1 to vibrate the lower die 1, generating an intermittent pressure difference between the upper and lower dies to compact the casting.

[0050] The beneficial effects of the present utility model are as follows: The upper die is provided, which consists of an upper die positioning plate and several upper die moving plates. The lower die is composed of a flat plate and a peripheral enclosure. There is a driving mechanism to drive the upper die moving plates to expand outward and fit with the inner side edges of the inner wall of the lower die, eliminating the side gap between the upper and lower dies. Thus, the flash formed in the gap between the upper and lower dies of the casting is eliminated. When the casting shrinks, the casting without flash can freely shrink, avoiding the shrinkage resistance caused by the flash and eliminating the casting cracks caused thereby.

[0051] As described above, the above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement that can be thought of without creative labor should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims

1. A flat plate or a flat plate with single-sided reinforcement ribs casting mold, with a casting ejection mechanism, characterized in that: It consists of a lower die and an upper die. The lower die consists of a flat plate and a surrounding enclosure. The upper die consists of an upper die positioning plate and two or more upper die movable plates. The upper surface of the upper die movable plate is in contact with the upper die positioning plate, and the lower surface is in contact with the casting. The periphery of the upper die movable plate is divided into the outer side of the upper die movable plate and the gap surface between the movable plates. A vertical elastic fitting device or a gap control device is provided between the upper die positioning plate and the upper die movable plate so that the upper die movable plate can move freely in the horizontal direction relative to the upper die positioning plate. The upper die movable plate has a driving mechanism that can drive the upper die movable plate to expand outward so that the outer side of the upper die movable plate and the inner side of the lower die retaining edge are fitted or moved in the opposite direction to reset.

2. The flat plate or flat plate with single-sided reinforcement rib casting mold according to claim 1, characterized in that: The upper mold moving plate is distributed in 4 pieces.

3. The flat plate or flat plate with single-sided reinforcement rib casting mold according to claim 1, characterized in that: The upper mold moving plate is distributed in two diagonal pieces.

4. The flat plate or flat plate with single-sided reinforcement rib casting mold according to claim 1, characterized in that: The elastic fitting device between the upper die positioning plate and the upper die moving plate is a bolt flange fixed on the upper die fixed plate and a spring is arranged between the upper die fixed plate.

5. The flat plate or flat plate with single-sided reinforcement rib casting mold according to claim 1, characterized in that: The clearance between the upper die positioning plate and the upper die moving plate is controlled so that there is a clearance between the positioning pins in the vertical direction of the positioning plate and the fixed flange surface of the upper die fixed plate and the plane of the upper die positioning flange.

6. The flat plate or flat plate with single-sided reinforcement rib casting mold according to claim 1, characterized in that: The driving mechanism of the upper die moving plate relative to the upper die positioning plate is cam driven with spring reset or spring driven with cam reset.

7. The flat plate or flat plate with single-sided reinforcement rib casting mold according to claim 1, characterized in that: The upper mold positioning plate has an inclined surface and the inner side of the lower mold retaining edge forming an inclined wedge space, and there is an exposed gap between the movable plates to cover the inclined wedge. When the inclined wedge moves in this inclined wedge space, the inner side of the inclined wedge contacts the inclined surface of the upper mold positioning plate and the inner side of the lower mold retaining edge respectively, and the inclined wedge blocks the gap between the two upper mold movable plates that cannot be covered by the upper mold positioning plate.

8. The flat plate or flat plate with single-sided reinforcement rib casting mold according to claim 1, characterized in that: When the casting is a flat plate with reinforcing ribs on one side, several mold cores are placed on the bottom plane of the lower mold.

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