A double-shaft ore sand making machine

Abstract

The present invention discloses a double-shaft ore sand making machine, which relates to the technical field of sand making machines. The sand making machine includes a sand making machine case, a feeding hopper, and a rotating shaft type pressing roller; it further includes a downward pressing assembly, a downward pressing driving member, a power assembly, and a lateral spiked crushing assembly. The two downward pressing assemblies are symmetrically arranged at the top wall of the aggregate chamber, and the downward pressing driving member can drive the two downward pressing assemblies to move synchronously in a self-rotating manner; the two lateral spiked crushing assemblies are symmetrically arranged inside the sand making machine case, and the two lateral spiked crushing assemblies can move towards the center of the aggregate chamber in a synchronous and relative moving manner. The power assembly is arranged on the outer side wall of the sand making machine case and is used to drive the downward pressing driving member to rotate and intermittently drive the two lateral spiked crushing assemblies to move away from each other. The structure of the present invention is simple, which can pre-crush ore materials with larger volumes and press the ore materials into the gap between the two rotating shaft type pressing rollers, facilitating the complete crushing of the ore materials and avoiding blockage, and has strong practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of sand making machines, and in particular to a double-shaft ore sand making machine. Background Art

[0002] A sand making machine, also called a vertical shaft impact crusher, is applicable to the crushing of soft or medium-hard and extremely hard ore materials with a hardness not higher than 320 Pa. It is a building material sand making equipment that can crush rocks, ores or natural

[0003] cobblestones and other stone materials into industrial sand to replace natural sand. The sand making machine is widely used in many fields such as smelting, building materials, highways, railways, water conservancy and chemical industries.

[0004] Some sand making machines crush the ore in the gap between two pressure rollers by installing pressure rollers on two shafts and the relative rotation of the two pressure rollers; however, the gap space between the pressure rollers is limited, and when encountering larger ore, it cannot enter the gap space, which may lead to the ore not being roll-pressed and crushed and may cause blockage. Summary of the Invention

[0005] The purpose of the present invention is to provide a double-shaft ore sand making machine to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A double-shaft ore sand making machine includes a sand making machine case, a feed hopper, and two rotary shaft type pressure rollers for crushing ore by means of rotary roll pressing. The feed hopper is arranged at the top of the sand making machine case; an aggregate chamber communicating with the feed hopper and a discharge chamber located below are provided inside the sand making machine case, and the rotary shaft type pressure rollers are arranged at the communication between the aggregate chamber and the discharge chamber; it further includes a downward pressing assembly, a downward pressing driving member, a power assembly, and a lateral spike crushing assembly. The downward pressing assembly is two and symmetrically arranged at the top wall of the aggregate chamber. Both downward pressing assemblies can move towards the gap between the two rotary shaft type pressure rollers. The downward pressing driving member is arranged inside the aggregate chamber and is connected to both downward pressing assemblies. The downward pressing driving member can drive the two downward pressing assemblies to move synchronously in a self-rotating manner; the lateral spike crushing assembly is two and symmetrically arranged inside the sand making machine case. The two lateral spike crushing assemblies can move towards the center of the aggregate chamber in a synchronous and relative moving manner. The power assembly is arranged on the outer side wall of the sand making machine case and is used to drive the downward pressing driving member to rotate and intermittently drive the two lateral spike crushing assemblies to move away from each other; wherein, when the downward pressing assembly is at the top wall of the aggregate chamber and above the gap between the rotary shaft type pressure rollers, the two lateral spike crushing assemblies are respectively at positions close to the side walls inside the sand making machine case.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In an optional scheme: the side spike crushing assembly includes a top rod, an impact crushing member and an outer end plate, the top rod slides through the side wall of the aggregate chamber, the impact crushing member is arranged on the end of the top rod located in the aggregate chamber and the impact crushing member contacts the ore in a tip impact manner, the outer end plate is arranged at the end of the top rod located outside the aggregate chamber and the outer end plate is connected to the outer wall of the sand making machine box through an impact spring, and the outer end plate can also be intermittently connected to the power assembly.

[0010] In an optional solution: the impact crushing member includes an impact plate and a plurality of first spike columns, the impact plate is fixed to the end of the top rod member located in the aggregate chamber, the plurality of first spike columns are arranged in a rectangular uniform arrangement on the end face of the impact plate, and the center of the end face of the impact plate has a second spike column whose length and diameter are greater than the first spike column.

[0011] In an optional scheme: the down-pressing assembly includes an inclined guide rod, at least one down-pressing roller and an intermediate rod shaft, and the two inclined guide rods are respectively fixed on the two opposite inner walls of the aggregate chamber, one end of the inclined guide rod is facing the top wall of the aggregate chamber and the other end extends to the gap between the two sand making machine boxes; each inclined guide rod is provided with a sliding sleeve sliding thereon, and the two ends of the intermediate rod shaft are respectively fixedly connected to the two sides of the sliding sleeve, the down-pressing roller is fixed on the intermediate rod shaft and the intermediate rod shaft also has a connecting sleeve rotating thereon, and the connecting sleeve is connected to the down-pressing drive member.

[0012] In an optional scheme: the downward driving member includes a double-ended screw member, a connecting arm rod and a spiral seat. The double-ended screw member is rotatably arranged inside the aggregate chamber and one end is connected to the power component. The spiral directions of the two ends of the double-ended screw member are opposite. There are two spiral seats and they slide horizontally on the inner wall of the aggregate chamber. The two ends of the double-ended screw member are spirally passed through the two spiral seats respectively. Each spiral seat is provided with a connecting arm rod with one end hinged thereto, and the ends of the two connecting arm rods away from the spiral seat are respectively hinged to the two connecting sleeves.

[0013] In an optional solution, a plurality of crushing teeth are provided in the middle of the double-ended screw rod, and protrusions are provided on the outer walls of the crushing teeth.

[0014] In an optional scheme: the power assembly includes two power rod shafts, which are respectively rotatably arranged on the outer wall of the sand making machine box through supports, and one end of the two power rod shafts is connected by a belt transmission member, and each power rod shaft is provided with a worm member and an incomplete gear member, wherein the worm member is matched with the worm wheel member provided on the double-headed screw member, and the incomplete gear member can intermittently engage with the upper rack provided on the side spike crushing assembly.

[0015] In an alternative solution: The bottom of the sand making machine case has a bracket seat, and a belt conveyor is arranged on the bracket seat. An outlet port communicating with the discharge chamber is provided on the bottom wall of the sand making machine case, and the outlet port is directly above the belt conveyor.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, the lateral spike crushing assembly can perform spike crushing on ores that cannot be placed between the two rotary shaft pressing rollers and can adjust the length direction of the ores when squeezing the ores, facilitating the placement of the ores between the two rotary shaft pressing rollers;

[0018] 2. In the present invention, the downward pressing assembly can downwardly press ores with a larger volume, so that the bottom of the ores contacts the rotary shaft pressing rollers or is in the gap between the two rotary shaft pressing rollers. As the rotary shaft pressing rollers rotate, the bottom of the ores gradually wears and becomes smaller, so that the ores can be placed in the gap between the rotary shaft pressing rollers and be crushed by the rotary shaft pressing rollers;

[0019] 3. The structure of the present invention is simple. It can pre-crush ores with a larger volume and press the ore materials into the gap between the two rotary shaft pressing rollers, facilitating the complete crushing of the ore materials and avoiding blockage, and has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the sand making machine in an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the downward pressing assembly in an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the structure of the power assembly in an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the structure of the impact crushing part in an embodiment of the present invention.

[0024] Annotation of reference numerals: sand making machine case 100, aggregate chamber 110, discharge chamber 120, feed hopper 130, discharge port 140, rotating shaft type pressure roller 200, downward pressing assembly 300, inclined guide rod 310, sliding sleeve 320, downward pressing roller 330, intermediate rod shaft 340, connecting sleeve 350, downward pressing driving part 400, double-headed screw rod part 410, connecting support arm rod 420, spiral seat 430, worm gear part 440, crushing teeth 450, power assembly 500, power rod shaft 510, worm part 520, belt driving part 530, incomplete gear part 540, power motor 550, lateral spike crushing assembly 600, top rod part 610, impact crushing part 620, impact plate 621, first spike column 622, second spike column 623, outer end plate 630, impact spring 640, upper rack 650, support seat 700, belt conveyor 800. Detailed implementation mode

[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments; in the drawings or descriptions, similar or identical parts are denoted by the same reference numerals, and in actual applications, the shapes, thicknesses or heights of the components can be enlarged or reduced. The various embodiments listed in the present invention are only used to illustrate the present invention and are not intended to limit the scope of the present invention. Any obvious modification or change made to the present invention does not depart from the spirit and scope of the present invention.

[0026] In one embodiment, as Figure 1As shown in the figure, a double-shaft ore sand making machine includes a sand making machine case 100, a feeding hopper 130, and two rotary shaft type pressure rollers 200 for crushing ore by rotating and rolling. The feeding hopper 130 is arranged at the top end of the sand making machine case 100. Inside the sand making machine case 100, there is an aggregate chamber 110 communicating with the feeding hopper 130 and a discharge chamber 120 located at the lower side. The rotary shaft type pressure roller 200 is arranged at the communication part between the aggregate chamber 110 and the discharge chamber 120. It also includes a downward pressing component 300, a downward pressing driving part 400, a power component 500, and a lateral spiked crushing component 600. There are two downward pressing components 300, which are symmetrically arranged at the top wall of the aggregate chamber 110. Both of the two downward pressing components 300 can move towards the gap between the two rotary shaft type pressure rollers 200. The downward pressing driving part 400 is arranged inside the aggregate chamber 110 and is connected to both of the two downward pressing components 300. The downward pressing driving part 400 can drive the two downward pressing components 300 to move synchronously in a self-rotating manner. The lateral spiked crushing component 600 has two and is symmetrically arranged inside the sand making machine case 100. The two lateral spiked crushing components 600 can move towards the center of the aggregate chamber 110 in a synchronous and relative moving manner. The power component 500 is arranged on the outer side wall of the sand making machine case 100 and is used to drive the downward pressing driving part 400 to rotate self and intermittently drive the two lateral spiked crushing components 600 to move away from each other. Among them, when the downward pressing component 300 is at the top wall of the aggregate chamber 110 and above the gap between the rotary shaft type pressure rollers 200, the two lateral spiked crushing components 600 are respectively at positions close to the side walls inside the sand making machine case 100.

[0027] In the embodiment of the present invention, the ore enters the inside of the aggregate chamber 110 through the feeding hopper 130, and the ore falls on the upper sides of the two rotary shaft type pressure rollers 200. The two rotary shaft type pressure rollers 200 rotate relatively to crush the ore material in the gap between the two rotary shaft type pressure rollers 200 by rotating and rolling. The crushed ore material falls inside the discharge chamber 120. When the volume of the ore is relatively large and cannot enter the gap between the two rotary shaft type pressure rollers 200, the power component 500 drives the downward pressing driving part 400 to rotate self and intermittently drives the two lateral spiked crushing components 600 to move relatively away from each other. When the power component 500 is disengaged from the lateral spiked crushing component 600, the two lateral spiked crushing components 600 can move relatively quickly and crush the ore on the rotary shaft type pressure rollers 200 in a reciprocating spiked impact manner. And the downward pressing component 300 gradually moves towards the upper side of the gap between the two rotary shaft type pressure rollers 200 under the drive of the downward pressing driving part 400. The two downward pressing components 300 can press the ore on the upper sides of the rotary shaft type pressure rollers 200, so as to press the ore into the inside of the two rotary shaft type pressure rollers 200 to achieve rolling and crushing. Thus, the problem that larger stones cannot be crushed and cause blockage is avoided. Among them, the two rotary shaft type pressure rollers 200 are driven by an external motor in cooperation with a gear transmission to rotate synchronously and in opposite directions.

[0028] In one embodiment, as Figure 1 shown, the lateral spike crushing assembly 600 includes a top rod member 610, an impact crushing member 620, and an outer end plate 630. The top rod member 610 slides through the side wall of the aggregate chamber 110. The impact crushing member 620 is provided at the end of the top rod member 610 located inside the aggregate chamber 110, and the impact crushing member 620 contacts the ore in a tip-impact manner. The outer end plate 630 is provided at the end of the top rod member 610 located outside the aggregate chamber 110, and the outer end plate 630 is connected to the outer wall of the sand making machine case 100 through a shock spring 640. The outer end plate 630 can also be intermittently connected to the power assembly 500. In the embodiment of the present invention, when the power assembly 500 contacts the outer end plate 630, the power assembly 500 can push the outer end plate 630 to move toward the side away from the sand making machine case 100, so that the shock spring 640 is stretched and has elastic force. When the power assembly 500 is separated from the outer end plate 630, under the rebounding force of the shock spring 640, the outer end plate 630 can quickly move toward the sand making machine case 100, and the top rod member 610 and the impact crushing member 620 can move toward the middle of the aggregate chamber 110, so that the impact crushing member 620 can impact the ore to make it break.

[0029] In one embodiment, as Figure 1 and Figure 2 shown, the pressing-down assembly 300 includes inclined guide rods 310, at least one pressing-down roller 330, and an intermediate rod shaft 340. There are two inclined guide rods 310 which are respectively fixed on two opposite inner walls of the aggregate chamber 110. One end of each inclined guide rod 310 faces the position of the top wall of the aggregate chamber 110, and the other end extends to the gap between the two sand making machine cases 100. A sliding sleeve 320 that slides on each inclined guide rod 310 is sleeved on each inclined guide rod 310. Both ends of the intermediate rod shaft 340 are fixedly connected to the side parts of the two sliding sleeves 320. The pressing-down roller 330 is fixed on the intermediate rod shaft 340, and a connecting sleeve 350 that rotates on the intermediate rod shaft 340 is further provided on the intermediate rod shaft 340. The connecting sleeve 350 is connected to the pressing-down driving member 400. In the embodiment of the present invention, the pressing-down driving member 400 is connected to the connecting sleeve 350, and the self-rotation of the pressing-down driving member 400 can push the intermediate rod shaft 340 to move along the inclined guide rod 310 through the connecting sleeve 350, so that the pressing-down roller 330 can gradually approach or move away from the rotary shaft type pressing roller 200, and further realize pressing down the ore.

[0030] In one embodiment, as Figure 1As shown, the downward driving member 400 includes a double-headed screw member 410, a connecting arm rod 420 and a spiral seat 430. The double-headed screw member 410 is rotatably arranged inside the collection chamber 110 and one end is connected to the power component 500. The spiral directions of the two ends of the double-headed screw member 410 are opposite. There are two spiral seats 430 and they slide horizontally on the inner wall of the collection chamber 110. The two ends of the double-headed screw member 410 are spirally passed through the two spiral seats 430 respectively. Each spiral seat 430 is provided with a connecting arm rod 420 hinged to it at one end. The ends of the connecting arm rod 420 away from the spiral seat 430 are respectively hinged to the two connecting sleeves 350; in an embodiment of the present invention, the power component 500 can drive the double-headed screw rod 410 to rotate, and the rotating double-headed screw rod 410 can move the spiral seat 430 on the double-headed screw rod 410 through the spiral cooperation with the spiral seat 430. The spiral seat 430 can push and pull the intermediate rod shaft 340 along the inclined guide rod 310 through the connecting arm rod 420, thereby realizing the downward pressure component 300 moving away from or close to the rotating shaft pressure roller 200.

[0031] In one embodiment, Figure 1 As shown, a plurality of crushing teeth 450 are provided in the middle of the double-ended screw member 410 and a protrusion is provided on the outer wall of the crushing teeth 450; in an embodiment of the present invention, the double-ended screw member 410 is driven by the power assembly 500 to rotate, so that the crushing teeth 450 rotate with the double-ended screw member 410, and the crushing teeth 450 can pre-crush the ore blocks entering the inside of the aggregation chamber 110 from the feed hopper 130, and the rotating crushing teeth 450 can further crush the ore blocks.

[0032] In one embodiment, Figure 1 and Figure 3 As shown, the power assembly 500 includes two power rod shafts 510, and the two power rod shafts 510 are respectively rotatably arranged on the outer wall of the sand making machine box 100 through supports. One end of the two power rod shafts 510 is connected by a belt transmission member 530, and each power rod shaft 510 is provided with a worm member 520 and an incomplete gear member 540, wherein the worm member 520 is matched with the worm wheel member 440 arranged on the double-headed screw member 410, and the incomplete gear member 540 can intermittently engage with the upper rack 650 arranged on the side spike crushing assembly 600. In an embodiment of the present invention, the power motor 550 drives the power rod shaft 510 to rotate. Through the transmission of the belt transmission part 530, the two power rod shafts 510 can rotate synchronously. The rotating power rod shaft 510 can make the double-headed screw rod part 410 rotate by itself through the cooperation of the worm part 520 and the worm wheel part 440. The power rod shaft 510 intermittently drives the side spike crushing assembly 600 to move away from the sand making machine box 100 through the intermittent cooperation between the incomplete gear part 540 and the upper rack 650.

[0033] In one embodiment,Figure 1 and Figure 4 As shown in Figure 4 , the impact crushing member 620 includes an impact plate 621 and a plurality of first spike columns 622. The impact plate 621 is fixed to the end of the top rod member 610 located inside the aggregate chamber 110. The plurality of first spike columns 622 are arranged on the end face of the impact plate 621 in a rectangular uniform distribution. The center of the end face of the impact plate 621 has a second spike column 623 with a length and a diameter both larger than those of the first spike columns 622. In the embodiment of the present invention, when the impact plate 621 approaches the ore, the first spike columns 622 can impact the side of the ore with their tips, which can concentrate the impact force and reduce the difficulty of ore crushing. The second spike column 623 can first impact the middle of the ore, and after piercing into the ore interior, there are cracks inside the ore, which facilitates the first spike columns 622 to crush the ore.

[0034] In one embodiment, as Figure 1 shown in Figure 1 , the bottom of the sand making machine case 100 has a support base 700, and a belt conveyor 800 is arranged on the support base 700. An outlet port 140 communicating with the discharge chamber 120 is provided on the bottom wall of the sand making machine case 100. The outlet port 140 is located directly above the belt conveyor 800. In the embodiment of the present invention, the crushed ore material inside the discharge chamber 120 falls onto the belt conveyor 800 through the outlet port 140, and the belt conveyor 800 can convey the crushed ore material to the corresponding place.

[0035] The above embodiment provides a double - shaft ore sand making. Among them, the two rotary roll presses 200 rotate relatively to crush the ore material in the gap between the two rotary roll presses 200 in a rotary roll - pressing manner, and the crushed ore material falls inside the discharge chamber 120. When the volume of the ore is relatively large and cannot enter the gap between the two rotary roll presses 200, the power assembly 500 drives the downward driving member 400 to rotate and intermittently drives the two lateral spike crushing assemblies 600 to move relatively away from each other. When the power assembly 500 is disengaged from the lateral spike crushing assemblies 600, the two lateral spike crushing assemblies 600 can quickly move relatively and crush the ore on the rotary roll presses 200 in a reciprocating spike - impact manner. And the downward pressing assemblies 300 gradually move towards the upper side of the gap between the two rotary roll presses 200 under the drive of the downward driving member 400, and the two downward pressing assemblies 300 can press the ore on the upper side of the rotary roll presses 200, so as to press the ore into the two rotary roll presses 200 to achieve roll - pressing crushing. Furthermore, it avoids the problem that large - volume stones cannot be crushed and cause blockage.

[0036] As described above, it is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should all be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A biaxial ore sand making machine, comprising a sand making machine case, a feed hopper, and two rotary roll pressure type shaft type pressure rolls for crushing ore by rotating and rolling, wherein the feed hopper is arranged at the top end of the sand making machine case; The inside of the sand making box is provided with an aggregate chamber communicating with the feed hopper and a discharge chamber located on the lower side, and the rotary roll is arranged at the communication part between the aggregate chamber and the discharge chamber; it is characterized in that, It further comprises a downward pressing assembly, a downward pressing driving part, a power assembly, and a lateral spike crushing assembly; The downward pressing assembly is composed of two and symmetrically arranged at the top wall of the aggregate chamber, and both downward pressing assemblies can move towards the gap between the two shaft type pressure rolls; The downward pressing driving part is arranged inside the aggregate chamber and is connected to both downward pressing assemblies, and the downward pressing driving part can drive both downward pressing assemblies to move synchronously in a self-rotating manner; The lateral spike crushing assembly is composed of two and symmetrically arranged inside the sand making machine case, and both lateral spike crushing assemblies can move towards the center of the aggregate chamber in a synchronous and relative moving manner; The power assembly is arranged on the outer side wall of the sand making machine case and is used to drive the downward pressing driving part to rotate and intermittently drive both lateral spike crushing assemblies to move away from each other; Wherein, when the downward pressing assembly is at the top wall of the aggregate chamber and above the gap between the shaft type pressure rolls, both lateral spike crushing assemblies are respectively at positions inside the sand making machine case close to its side wall; The downward pressing assembly comprises inclined guide rods, at least one downward pressing roll, and an intermediate rod shaft; There are two inclined guide rods which are respectively fixed on two opposite inner walls of the aggregate chamber, one end of the inclined guide rod faces the position of the top wall of the aggregate chamber and the other end extends to the gap between the two sand making machine cases; A sliding sleeve sliding on each inclined guide rod is sleeved thereon, and both ends of the intermediate rod shaft are respectively fixedly connected to the side parts of the two sliding sleeves; The downward pressing roll is fixed on the intermediate rod shaft, and a connecting sleeve rotatable on the intermediate rod shaft is further arranged on the intermediate rod shaft, and the connecting sleeve is connected to the downward pressing driving part; The downward pressing driving part comprises a double-headed screw rod part, a connecting support arm rod, and a spiral seat; The double-headed screw rod part is rotatably arranged inside the aggregate chamber and one end is connected to the power assembly, and the spiral directions at both ends of the double-headed screw rod part are opposite; There are two spiral seats which horizontally slide on the inner wall of the aggregate chamber, and both ends of the double-headed screw rod part respectively penetrate through the two spiral seats in a spiral manner; A connecting support arm rod with one end hinged thereto is arranged on each spiral seat, and the end parts of the two connecting support arm rods far from the spiral seats are respectively hinged to the two connecting sleeves.

2. The double-shaft ore sand making machine according to claim 1, wherein The lateral spike crushing assembly comprises a top rod piece, an impact crushing piece, and an outer end plate; The top rod piece slides through the side wall of the aggregate chamber, the impact crushing piece is arranged at the end of the top rod piece located inside the aggregate chamber, and the impact crushing piece contacts the ore in a way of tip impact; The outer end plate is arranged at the end of the top rod piece located outside the aggregate chamber, and the outer end plate is connected to the outer wall of the sand making machine case through a shock spring, and the outer end plate can also be intermittently connected to the power assembly.

3. The double-shaft ore sand making machine according to claim 2, characterized in that, The impact crushing piece comprises an impact plate and a plurality of first spike columns; The impact plate is fixed at the end of the top rod piece located inside the aggregate chamber, and the plurality of first spike columns are arranged on the end face of the impact plate in a rectangular uniform distribution; A second spike column with a length and a diameter both larger than those of the first spike columns is arranged at the center of the end face of the impact plate.

4. The double-shaft ore sand making machine according to claim 1, characterized in that, A plurality of crushing teeth are arranged in the middle of the double-headed screw rod part, and protrusions are arranged on the outer wall of the crushing teeth.

5. The double-shaft ore sand making machine according to claim 1, characterized in that, The power assembly comprises two power rod shafts; The two power rod shafts are respectively rotatably arranged on the outer wall of the sand making machine box through supports, one end portion of the two power rod shafts is connected by a belt transmission member, and each power rod shaft is provided with a worm member and an incomplete gear member; The worm member is matched with the worm wheel member provided on the double-ended screw member, and the incomplete gear member can be intermittently meshed with the upper rack provided on the lateral spike crushing assembly.

6. The double-shaft ore sand making machine according to claim 1, wherein The bottom of the sand making machine box is provided with a bracket seat and a belt conveyor is arranged on the bracket seat. The bottom wall of the sand making machine box is provided with a discharge port connected to the discharge chamber, and the discharge port is located directly above the belt conveyor.

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