An excavator support sand core based on a coated sand shell process

Abstract

The utility model discloses a kind of excavator support sand core based on coated sand shell process, it is related to pouring sand core technical field, the excavator support sand core based on coated sand shell process includes: the upper piece is the groove shape structure of one side opening, the upper piece is equipped with multiple upper sink grooves along extension direction, the upper piece is further equipped with multiple exhaust holes, multiple exhaust holes are set on the top surface of upper piece;The lower piece is the groove type structure of one side opening, the lower piece is connected with the upper piece along vertical direction, the lower piece is further provided with lower sink groove, the axis of multiple lower sink grooves and the axis of multiple upper sink grooves are collinear;Lifting appliance, the number of lifting appliance is multiple, multiple lifting appliances are respectively along the axis of upper sink groove and are set in upper piece and lower piece, and the upper piece is fixedly connected with lower piece by lifting appliance.The utility model is based on coated sand shell process, by being equipped with upper piece, lower piece is combined to obtain sand core main body, and the fixed connection and hoisting handling of upper piece and lower piece are realized by lifting appliance, realize simple operation, high efficiency of making core, the effect of good casting performance.

Description

Technical Field

[0001] This utility model relates to the field of cast sand core technology, and in particular to an excavator support sand core based on a coated sand shell process. Background Technology

[0002] The excavator boom support casting is a key support and connecting component on the excavator boom. The rear support is connected to the frame, and the front support is connected to the stick. During the excavation process, the support is a critical load-bearing component, so the internal quality requirements for the support casting are high, and cracks and defects are not allowed.

[0003] In the prior art, both the front and rear boom supports have large closed cavity structures. These cavity structures require sand core forming during casting. However, due to the small diameter and thin thickness of the connecting parts of the sand core, they are prone to breakage. Therefore, the collapsibility or disintegration of the main body of the sand core is required to be high. In the prior art, resin sand is usually used for manual core making, which is complicated, has low core making efficiency, and can also cause visible cracks at the rounded corners of the inner cavity of the cast part after molding, which seriously affects the performance of the casting.

[0004] Therefore, there is a need for excavator support sand cores that are easy to operate, have high core-making efficiency, and produce high-quality castings. Utility Model Content

[0005] The main purpose of this invention is to provide an excavator bearing sand core based on a coated sand shell process, which aims to solve the problem that existing excavator bearing sand cores are difficult to ensure casting production efficiency and casting quality.

[0006] To achieve the above objectives, the excavator bearing sand core based on the coated sand shell process proposed in this utility model includes:

[0007] The upper piece is a groove-shaped structure with an opening on one side. The upper piece has multiple recessed grooves along its extension direction and multiple vent holes, which are located on the top surface of the upper piece.

[0008] The lower piece is a groove-shaped structure with an opening on one side. The lower piece is connected to the upper piece in a vertical direction. The lower piece is also provided with a recessed groove. The axes of the multiple recessed grooves are collinear with the axes of the multiple upper recessed grooves.

[0009] The lifting device is provided in multiple ways. The multiple lifting devices are respectively installed along the axis of the upper sinking trough on the upper piece and the lower piece. The upper piece is fixedly connected to the lower piece through the lifting device.

[0010] Preferably, the upper plate includes an upper core head and an upper sand core body. The upper core head is fixedly connected to the upper sand core body. Both the upper core head and the upper sand core body are groove-shaped structures with openings on the same side, and the upper core head and the upper sand core body are internally connected. The upper sinking grooves are respectively disposed on the top surfaces of the upper core head and the upper sand core body.

[0011] Preferably, the lower plate includes a lower core head and a lower sand core body. The lower core head is fixedly connected to the lower sand core body. Both the lower core head and the lower sand core body are groove-shaped structures with openings on the same side, and the lower core head and the lower sand core body are internally connected. The sinking grooves are respectively disposed on the top surfaces of the lower core head and the lower sand core body.

[0012] Preferably, the upper piece is further provided with a first exhaust groove, and the lower piece is provided with a second exhaust groove. The first exhaust groove and the second exhaust groove are both semi-circular grooves and the centers of the first exhaust groove and the second exhaust groove are at the same point. The first exhaust groove and the second exhaust groove enclose a parting surface exhaust channel, and the axis of the parting surface exhaust channel is perpendicular to the exhaust hole.

[0013] Preferably, the lifting device includes a lock cylinder and a lifting eye nut. The lock cylinder passes through the upper plate and the lower plate along the axis of the upper recess. The lifting eye nut has a lifting eye and a threaded sleeve. The lifting eye is fixedly disposed on the threaded sleeve at one end away from the upper plate. The lock cylinder is a threaded rod. The lifting eye nut is threadedly connected to the lock cylinder through the threaded sleeve.

[0014] This invention is based on the coated sand shell process. By combining an upper and lower sheet to form a sand core, the sand core has a firm and smooth surface and high strength. Furthermore, because the main body of the sand core adopts a hollow structure design, it is conducive to the shrinkage and accommodation of the casting. The upper and lower sheets are fixedly connected and lifted and transported by a lifting tool, which achieves the effects of simple operation, high core making efficiency, reduced manual intervention and labor intensity, and good casting performance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an excavator support sand core based on a coated sand shell process according to an embodiment of the present invention;

[0017] Figure 2This is an exploded structural diagram of an excavator support sand core according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of a lifting device according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of a casting according to an embodiment of the present invention;

[0020] Figure 5 This is a bottom view of the lower piece in one embodiment of the present invention.

[0021] Explanation of icon numbers:

[0022] 1000 Excavator bearing sand core 100 Upper part 110 Upper sinkhole 120 Exhaust port 130 Top tip 131 First exhaust channel 140 Upper core body 200 Part 2 210 sinkhole 220 Lower core head 221 Second exhaust channel 230 Lower core body 300 lifting gear 310 Lock cylinder 320 Eye bolt 2000 casting

[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] It should be noted that all directional indicators in this embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0027] In existing technologies, ester-based water glass sand is currently the primary process used for excavator parts. This process is characterized by low material cost, long molding sand lifespan, and better collapsibility than furan resin sand. However, it is non-renewable, has poor environmental friendliness, and requires significant manual core-making efficiency, high labor costs, and high labor intensity. Therefore, this invention employs a coated sand process to prepare excavator support sand cores. The coating sand shell process for preparing sand cores primarily considers the sand core's thermal stability, fluidity, low gas evolution, high strength, high temperature resistance, low expansion, easy demolding, and anti-sticking properties.

[0028] like Figures 1-5 As shown, this utility model proposes an excavator support sand core 1000 based on a coated sand shell process, comprising: an upper plate 100, which is a groove-shaped structure with one side opening, and the upper plate 100 is provided with multiple upper sinking grooves 110 along the extending direction, and the upper plate 100 is also provided with multiple vent holes 120, which are disposed on the top surface of the upper plate 100; a lower plate 200, which is a groove-shaped structure with one side opening, and the lower plate 200 is connected to the upper plate 100 in the vertical direction, and the lower plate 200 is also provided with lower sinking grooves 210, the axes of the multiple lower sinking grooves 210 being collinear with the axes of the multiple upper sinking grooves 110; and multiple lifting devices 300, which are respectively inserted through the upper plate 100 and the lower plate 200 along the axes of the upper sinking grooves 110, and the upper plate 100 is fixedly connected to the lower plate 200 through the lifting devices 300.

[0029] It is understandable that the excavator support sand core 1000 is used to prepare the excavator support casting 2000. The boom support casting 2000 has high internal quality requirements and is not allowed to have cracks or defects. It needs to be subjected to non-destructive testing. Existing technology cannot solve the problems of cracks in the inner cavity of the boom support casting 2000, low sand core making efficiency, and insufficient sand core setting efficiency.

[0030] In detail, in this embodiment, the opening directions of the upper piece 100 and the lower piece 200 are opposite. The upper piece 100 and the lower piece 200 are aligned and connected along the vertical direction with one side of the opening. A cavity is formed between the upper piece 100 and the lower piece 200. A reinforcing rib and a connecting post are also provided between the upper piece 100 and the lower piece 200. When the upper piece 100 and the lower piece 200 are connected along the vertical direction, the connecting post inside the upper piece 100 and the lower piece 200 are aligned and abutted against each other. The mechanical strength of the upper piece 100 and the lower piece 200 is enhanced by the reinforcing rib and the connecting post. More specifically, the raw materials for the sand core, including the coated sand and the coating, contain a large amount of organic matter. During casting, due to the high temperature, a large amount of gas is generated inside the sand core. Therefore, during the preparation of the casting 2000, it is necessary to ensure that the sand core is vented in time. Otherwise, the gas will remain inside the boom support casting 2000 and cause porosity defects. Therefore, this utility model provides multiple vent holes 120 on the horizontal top surface of the upper plate 100 to achieve vertical venting. The multiple vent holes 120 are spaced apart. The upper piece 100 is also provided with an upper sinking groove 110, and the lower piece 200 is also provided with a lower sinking groove 210 corresponding to the vertical position of the upper sinking groove 110. The axis of the upper sinking groove 110 is collinear with the axis of the lower sinking groove 210, and both the upper sinking groove 110 and the lower sinking groove 210 are circular sinking grooves. The upper sinking groove 110 and the lower sinking groove 210 have the same aperture. After the upper piece 100 and the lower piece 200 are aligned, the upper sinking groove 110 and the lower sinking groove 210 are still not connected. The operator uses the two ends of the lifting device 300 to connect the upper piece 100 and the lower piece 200 respectively to achieve a fixed connection between the upper piece 100 and the lower piece 200. The two ends of the lifting device 300 are connected to the bottom wall of the upper sinking groove 110 and the lower sinking groove 210 respectively. The lifting device 300 is used to achieve fixation and facilitate the lifting and transportation after the core is made.

[0031] In one embodiment, the upper plate 100 includes an upper core head 130 and an upper sand core body 140. The upper core head 130 and the upper sand core body 140 are fixedly connected. Both the upper core head 130 and the upper sand core body 140 are groove-shaped structures with openings on the same side, and the interiors of the upper core head 130 and the upper sand core body 140 are connected. Upper sinking grooves 110 are respectively disposed on the top surfaces of the upper core head 130 and the upper sand core body 140.

[0032] In this embodiment, the opening of the upper plate 100 is vertically downward, and the vent 120 is set on the horizontal top surface of the upper core head 130. The axis of the vent 120 is vertically set, and there are two vent 120s. The two vent 120s are symmetrically arranged along the horizontal axis of the upper core head 130. The cross-section of the upper core head 130 is a stepped groove structure, and the upper sand core body 140 is a rectangular groove structure with a sloping top. The upper core head 130 and the upper sand core body 140 are connected by a circular hollow connecting groove. There are two upper sinking grooves 110, one on the upper core head 130 and one on the upper sand core body 140 along the horizontal axis of the upper plate 100, which are used to fix and connect with the two lifting tools 300 to ensure the stability of the excavator support sand core 1000 during the lifting process.

[0033] In one embodiment, the lower piece 200 includes a lower core head 220 and a lower sand core body 230. The lower core head 220 and the lower sand core body 230 are fixedly connected. Both the lower core head 220 and the lower sand core body 230 are groove-shaped structures with openings on the same side, and the interiors of the lower core head 220 and the lower sand core body 230 are connected. The sinking grooves 210 are respectively disposed on the top surfaces of the lower core head 220 and the lower sand core body 230.

[0034] In this embodiment, the lower piece 200 is a groove-shaped structure with a vertically upward opening. The lower core head 220 and the upper core head 130 are mirror images of each other along the horizontal plane, and the lower sand core body 230 is also mirror images of the upper sand core body 140 along the horizontal plane. It can be understood that the lower core head 220 and the lower sand core body 230 are also connected by a semi-circular hollow connecting groove, and the opening of the semi-circular hollow connecting groove is upward. When the upper piece 100 and the lower piece 200 are connected, the two semi-circular hollow connecting grooves with opposite opening directions form a connecting channel to achieve the venting effect. The number of sinking grooves 210 is set to two, one on the lower core head 220 and one on the lower sand core body 230 along the horizontal axis of the lower piece 200.

[0035] In one embodiment, the upper piece 100 is further provided with a first exhaust groove 131, and the lower piece 200 is provided with a second exhaust groove 221. The first exhaust groove 131 and the second exhaust groove 221 are both semi-circular grooves and the centers of the first exhaust groove 131 and the second exhaust groove 221 are at the same point. The first exhaust groove 131 and the second exhaust groove 221 enclose a parting surface exhaust channel, and the axis of the parting surface exhaust channel is perpendicular to the exhaust hole 120.

[0036] In this embodiment, the first exhaust groove 131 of the upper piece 100 is a downward-opening semi-circular groove and there is only one of it. The first exhaust groove 131 is disposed on the vertical surface of the upper core head 130. The second exhaust groove 221 of the lower piece 200 is an upward-opening semi-circular groove and there is only one of it. The second exhaust groove 221 is disposed on the vertical surface of the lower core head 220. After the upper piece 100 and the lower piece 200 are combined, a parting surface exhaust channel is formed. The axis of the parting surface exhaust channel is perpendicular to the axis of the exhaust hole 120, so as to discharge the gas of the excavator support sand core 1000.

[0037] Understandably, the number of exhaust channels on the parting surface can be increased or decreased according to actual production needs.

[0038] In one embodiment, the lifting device 300 includes a lock core 310 and a lifting eye nut 320. The lock core 310 passes through the upper plate 100 and the lower plate 200 along the axis of the upper recess 110. The lifting eye nut 320 is provided with a lifting eye and a threaded sleeve. The lifting eye is fixedly disposed on the threaded sleeve at one end away from the upper plate 100. The lock core 310 is a threaded rod, and the lifting eye nut 320 is threadedly connected to the lock core 310 through the threaded sleeve.

[0039] In this embodiment, the lock cylinder 310 has a threaded rod structure. The lock cylinder 310 passes through both ends of the upper plate 100 and the lower plate 200 and is also connected to washers respectively. The lifting eye nut 320 is threadedly connected to the end of the lock cylinder 310 that passes through the upper plate 100 and extends upward through a threaded sleeve. The end of the lock cylinder 310 that passes through the lower plate 200 is threadedly connected to a nut. A ring-shaped lifting eye is welded to the top of the lifting eye nut 320, which facilitates the operation of workers to transport the excavator support sand core 1000 using a hoisting machine.

[0040] This invention is based on the coated sand shell process. By combining an upper and lower sheet to form a sand core, the sand core has a firm and smooth surface and high strength. Furthermore, because the main body of the sand core adopts a hollow structure design, it is conducive to the shrinkage and accommodation of the casting. The upper and lower sheets are fixedly connected and lifted and transported by a lifting tool, which achieves the effects of simple operation, high core making efficiency, reduced manual intervention and labor intensity, and good casting performance.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. An excavator bearing sand core based on a coated sand shell process, characterized in that, include: The upper piece is a groove-shaped structure with an opening on one side. The upper piece has multiple recessed grooves along its extension direction and multiple vent holes, which are located on the top surface of the upper piece. The lower piece is a groove-shaped structure with an opening on one side. The lower piece is connected to the upper piece in a vertical direction. The lower piece is also provided with a recessed groove. The axes of the multiple recessed grooves are collinear with the axes of the multiple upper recessed grooves. The lifting device is provided in multiple ways. The multiple lifting devices are respectively installed along the axis of the upper sinking trough on the upper piece and the lower piece. The upper piece is fixedly connected to the lower piece through the lifting device.

2. The excavator bearing sand core based on the coated sand shell process as described in claim 1, characterized in that, The upper plate includes an upper core head and an upper sand core body. The upper core head is fixedly connected to the upper sand core body. Both the upper core head and the upper sand core body are groove-shaped structures with openings on the same side, and the upper core head and the upper sand core body are internally connected. The upper sinking grooves are respectively disposed on the top surfaces of the upper core head and the upper sand core body.

3. The excavator bearing sand core based on the coated sand shell process as described in claim 2, characterized in that, The lower plate includes a lower core head and a lower sand core body. The lower core head is fixedly connected to the lower sand core body. Both the lower core head and the lower sand core body are groove-shaped structures with openings on the same side, and the interiors of the lower core head and the lower sand core body are connected. The sinking grooves are respectively disposed on the top surfaces of the lower core head and the lower sand core body.

4. The excavator bearing sand core based on the coated sand shell process as described in claim 1, characterized in that, The upper piece is also provided with a first exhaust groove, and the lower piece is provided with a second exhaust groove. The first exhaust groove and the second exhaust groove are both semi-circular grooves and the centers of the first exhaust groove and the second exhaust groove are at the same point. The first exhaust groove and the second exhaust groove enclose a parting surface exhaust channel, and the axis of the parting surface exhaust channel is perpendicular to the exhaust hole.

5. The excavator bearing sand core based on the coated sand shell process as described in claim 1, characterized in that, The lifting device includes a lock cylinder and a lifting eye nut. The lock cylinder passes through the upper plate and the lower plate along the axis of the upper recess. The lifting eye nut has a lifting eye and a threaded sleeve. The lifting eye is fixedly set on the threaded sleeve at one end away from the upper plate. The lock cylinder is a threaded rod. The lifting eye nut is threadedly connected to the lock cylinder through the threaded sleeve.

Images