WO2022166291A1

WO2022166291A1 - Core sand manufacturing procedure and core sand manufacturing unit

Info

Publication number: WO2022166291A1
Application number: PCT/CN2021/129556
Authority: WO
Inventors: 杨林龙; 李嘉; 陆高春
Original assignee: 苏州明志科技股份有限公司
Priority date: 2021-02-03
Filing date: 2021-11-09
Publication date: 2022-08-11
Also published as: CN112808943A

Abstract

The present application relates to the field of core sand manufacturing technology, and provides a core sand manufacturing procedure and a core sand manufacturing unit. The core sand manufacturing procedure provided in the present application comprises: calculating, according to information of core sand to be manufactured, the weight of the core sand to be mixed at a time; mixing raw sand and binder to prepare mixed core sand; calculating and calibrating the height of feeding level in a sand cylinder of the core sand manufacturing unit; and directly adding the mixed core sand into a core sand manufacturing mechanism. The core sand manufacturing procedure provided in the present application alleviates the technical problem that the core sand tends to have a poor quality due to the core sand manufacturing procedure in the related art.

Description

Core making process and core making unit

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese Patent Application No. 202110144605.8 and titled "Core-Making Process and Core-Making Unit" filed with the China Patent Office on February 3, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of sand core making, and in particular, to a core making process and a core making unit.

Background technique

Sand core is a transitional product used to manufacture castings in foundry production. It is formed by bonding and solidifying foundry sand and auxiliary materials to form a sand core. The process of making a sand core in the related art is that the raw sand in the sand storage hopper enters the weighing hopper. After the raw sand in the weighing hopper meets the requirements, it enters the sand mixing cylinder from the weighing hopper, and then adds the binder to the sand mixing cylinder. The sand mixing cylinder mixes the raw sand and the binder to make When the mixed core sand in the core-making unit sand barrel is lower than the set value, the transitional sand storage hopper automatically puts a certain amount of material into the core-making unit sand barrel. When the core sand material level of the unit sand barrel reaches the upper limit of the set value, the feeding will be stopped.

A lot of mixed core sand is stored in the transition sand storage hopper at one time, and it needs to be put into the sand barrel of the core making unit many times before it can be used up, so that the mixed core sand in the transition sand storage bucket will be used for a long time, which will cause the core sand to stick. Partial curing of the binder (especially in the case of high room temperature in summer) reduces the fluidity of the mixed core sand, which in turn affects the core quality of the subsequent core-making unit. First of all, in order to prolong the service life of the mixed core sand in the transition sand storage hopper, it is necessary to carry out complex cooling and sealing design for the transition sand bucket, which will increase the manufacturing investment of the equipment. In addition, once the mixed core sand in the transition sand storage bucket is stored for too long Affecting the quality of core making, it is necessary to clean up all the failed mixed core sand and re-prepare the mixed core sand, resulting in a waste of mixed core sand and a waste of labor resources.

SUMMARY OF THE INVENTION

The present application provides a core-making process to alleviate the technical problem that the core-making process in the related art is likely to cause poor quality of core sand.

The core-making process provided in this application may include:

Calculate the weight of the core sand to be mixed once according to the sand core information;

Mixing raw sand and binder to prepare mixed core sand;

The mixed core sand is directly added to the core making unit.

Optionally, the calculation of the weight of the core sand to be mixed at one time may include:

Calculate the sand core modulus that can be produced after mixing according to the time for making a sand core and the time that the mixed core sand can be stored;

The weight of the mixed core sand is calculated according to the manufacturable sand core modulus and the weight of the single-mould sand core.

Optionally, the mixing of the raw sand and the binder may include:

The sand mixing parameters are set according to the weight of the sand core and the technological formula, and the sand mixing parameters may include the addition amount of the original sand, the addition amount of the binder, the addition amount of the auxiliary materials and the sand mixing time.

Optionally, the setting of the sand mixing parameters according to the weight of the sand core and the process formula may include: σ=gs/Gs, where σ may be an adjustable parameter, gs may be the weight of the binder, and Gs may be is the weight of the core sand.

Optionally, the setting of the sand mixing parameters according to the weight of the sand core and the process formula may include: GH≤K*Gh, where GH may be the weight of the mixed core sand; K may be a coefficient, and Gh may be each The mold needs the weight of the core sand.

Optionally, the mixing of the raw sand and the binder may include: mixing one or more binders with the raw sand to form mixed core sand.

Optionally, the mixing of the raw sand and the binder may include: firstly mixing the raw sand with the first binder or auxiliary material to prepare a single-component material for later use, and when the mixed core sand is required for core making, A second binder is added to the one-pack.

Optionally, the core making process may further include: before directly adding the mixed core sand into the core making unit, calculating and calibrating the height of the feeding material level in the sand barrel of the core making unit.

The core-making process provided by the present application may include: calculating the weight of the core sand to be mixed once according to the information of the sand cores produced; mixing the raw sand and the binder to prepare the mixed core sand; directly adding the mixed core sand to the core-making unit middle. In the core making process provided in the present application, in the process of making the sand core, the mixed core sand required for core making is mixed every time, and the mixed core sand is directly added into the core making mechanism, so as to realize "mixing and use now" without original sand The waiting time after mixing avoids poor fluidity caused by prolonged exposure of the mixed core sand and affects the quality of the core making.

The present application provides a core making unit to alleviate the technical problem that the core sand quality is easily caused by the core making process in the related art.

The core-making unit provided by the present application may include: a control system, and a weighing mechanism, a sand mixing mechanism and a core-making mechanism respectively signally connected to the control system, the weighing mechanism, the sand mixing mechanism and the core-making mechanism The core mechanisms may be communicated in sequence.

Optionally, the weighing mechanism may include a weighing bucket and a weighing sensor, and the weighing sensor may be provided in the weighing bucket and can be signally connected to the control system;

The sand mixing mechanism may include a sand mixing cylinder, and a first feeding port and a second feeding port both used for adding a binder, and the first feeding port and the second feeding port may both be set in the mixing chamber. Sand barrel, or, the first feeding port may be provided in the weighing hopper, and the second feeding port may be provided in the sand mixing barrel.

Optionally, when both the first feeding port and the second feeding port are provided in the sand mixing drum, the first binder and the second binder can pass through the first feeding port and the second feeding port. The second feeding port is added into the sand mixing drum at the same time.

Optionally, in the case that the first feeding port is provided in the weighing hopper and the second feeding port is provided in the sand mixing drum, the first binder can be absorbed through the first feeding port. into the weighing hopper, and a second binder may be added to the sand mixing drum through the second feeding port.

During the core-making process of the core-making unit provided by this application, the control system can control the weighing mechanism to weigh the raw materials according to the working conditions of each round of production, and the weighed raw materials can be added to the sand mixing mechanism. The mixed core sand formed by mixing can be added to the core making mechanism, and the core making mechanism can make the sand core.

Compared with the core-making unit in the related art that stores the mixed core sand after mixing, the core-making unit provided by the present application omits the transitional sand storage hopper, and the weighing mechanism weighs the required amount of core sand one or more times each time. Raw sand, and the weighed raw sand is added to the sand mixing mechanism for mixing to make mixed core sand. The long-term exposure of the mixed core sand results in poor fluidity and affects the quality of core making; in addition, because the transitional sand storage hopper is omitted, the detection switch and structure are saved, and the overall height of the core making unit is reduced, reducing the space occupied.

Description of drawings

In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or related technologies, the following briefly introduces the accompanying drawings required in the description of the specific embodiments or related technologies. Obviously, the accompanying drawings in the following description are For some embodiments of the present application, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a core-making unit provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram 1 of a sand mixing mechanism of a core-making unit provided by an embodiment of the present application;

FIG. 3 is a second structural schematic diagram of a sand mixing mechanism of a core-making unit provided by an embodiment of the present application.

Icon: 110-PLC controller; 210-Weighing bucket; 220-Weighing sensor; 310-Sand mixing cylinder; 320-First feeding port; 330-Second feeding port; 340-Sand discharge valve; 350-Sand loading Channel; 360-sand level sensor; 410-core-making unit sand barrel; 420-core-making core box; 430-data reading device; 500-sand storage bucket.

Detailed ways

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limitations on this application. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection or indirect connection through an intermediate medium, and may be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific situations.

The core-making process provided in the embodiment of the present application may include: calculating the weight of the core sand to be mixed once according to the information of the produced sand cores; mixing the original sand and the binder to prepare the mixed core sand; Calculate and calibrate the height of the feeding level inside; add the mixed core sand directly into the core making mechanism.

Optionally, calculating the weight of the core sand to be mixed once may include: calculating the modulus of the sand core that can be made after mixing according to the time for making a sand core and the time that the mixed core sand can be stored; and the weight of the single-mould sand core to calculate the weight of the mixed core sand.

In order to ensure the accuracy of the core sand after mixing, the amount of raw sand that the weighing hopper 210 weighs each time can be set according to the weight of the sand core to be manufactured, so as to ensure that the mixed core sand has the required fluidity within the use time.

For example, when making a 5KG sand core, 15KG core sand can be mixed, and the mixed core sand can be used 3 times. When making a 2KG sand core, due to the short production cycle of small sand cores, 10KG core sand can be mixed, and the mixed core sand can be mixed. Sand can be used 5 times.

Optionally, mixing the raw sand and the binder may include: setting the sand mixing parameters according to the weight of the sand core and the process formula, and the sand mixing parameters include the addition amount of the original sand, the addition amount of the binder, and the addition amount of the auxiliary materials. and sand mixing time.

Optionally, setting the sand mixing parameters according to the weight of the sand core and the process formula may include: σ=gs/Gs, where σ may be an adjustable parameter, gs may be the weight of the binder, and Gs may be the core sand weight. Through this limitation, the produced mixed core sand can be more suitable for making sand cores, so that the quality of the produced sand cores is more uniform.

Optionally, setting the sand mixing parameters according to the weight of the sand core and the process formula may include: GH≤K*Gh, where GH may be the weight of the mixed core sand; K may be a coefficient, and Gh may be the required value of each mold. The weight of the core sand. By limiting the amount of mixed core sand prepared each time, it is possible to achieve "mix-and-use" without the waiting time after sand mixing.

In some embodiments, mixing the raw sand and the binder may include: simultaneously adding the two-component binder to the sand mixing cylinder 310 for sand mixing, and preparing the mixed core sand for making the sand core at one time, This method requires that the amount of each batch mixed in the sand mixing cylinder 310 is the required amount for core making, which can ensure that the mixing can be used immediately.

In other embodiments, the mixing of the raw sand and the binder may include: after the weighing hopper 210 completes the weighing, firstly mixing the raw sand with the first binder or auxiliary material in the weighing hopper 210 to form a single The component materials are for standby use. When core-making needs to use mixed core sand, according to the required amount of mixed sand cores, the single-component materials in the weighing hopper 210 are quantitatively added to the sand mixing cylinder 310, and are added to the sand mixing cylinder 310. A second binder is added.

The reason why the mixed core sand will slowly solidify is that the two-component binder in it is gradually cured after chemical reaction. Therefore, the mixed core sand should be used as soon as possible; when the original sand is put into a binder (or additive) Once mixed first, one of its binder blends does not cure for a short period of time and has a longer durability.

The core-making process provided by this application can be controlled and realized by a PLC (Programmable Logic Controller, full English name: Programmable Logic Controller) controller, and the specific working process can be as follows:

The data reading device 430 can automatically read the parameters of the core-making core box 420, obtain the weight of the sand core, and transmit the relevant process formula data to the PLC controller 110; the PLC controller 110 can be set according to the weight of the sand core and the process formula. On the one hand, the relevant sand mixing parameters of the sand mixing unit (including the addition amount of raw sand, binder addition, auxiliary material addition, sand mixing time, etc.) are set; on the other hand, the sand barrel of the core making unit is set. The relevant feeding level height in 410 is calculated and calibrated, and is detected by the sand level sensor 360;

According to the weight of the single-mould sand core to be made and the time that the original sand can be stored after mixing, the modulus of the sand core that can be made after one mixing is calculated, and the weight of the mixed core sand is calculated according to the modulus of the sand core that can be made.

The weighing hopper 210 can weigh the raw sand according to the output value of the PLC controller 110, and add the weighed raw sand into the sand mixing cylinder 310. The added value calculated by the process ratio value is added to the sand mixing cylinder 310; the sand mixing cylinder 310 can mix the original sand and the binder;

When the sand barrel 410 of the core making unit is moved to the sand loading station, the sand level sensor 360 can detect that the raw sand material level in the sand making barrel is at the “sand can be discharged” level, and the sand discharge valve on the sand mixing barrel 310 340 is turned on, and all the mixed raw sand is added into the sand barrel 410 of the core making unit. At the same time, the sand level sensor 360 detects the position of the final mixed core sand and transmits it to the PLC controller 110, which calculates the next mixed core sand. Sand volume and sand mixing preparation;

During the entire sand core mixing process, according to the production conditions of each round, the PLC controller 110 can calculate the amount of raw sand that will be used in the next round, so as to realize "mixing and use now" without sand mixing. The waiting time after the production is avoided to avoid the poor fluidity caused by the prolonged exposure of the mixed core sand, which will affect the quality of the core production.

The embodiment of the present application provides a core-making unit to alleviate the technical problem that the core-making process in the related art is likely to cause poor quality of core sand.

The core-making unit provided in the embodiment of the present application may include: a control system, and a weighing mechanism, a sand mixing mechanism and a core-making mechanism respectively signally connected to the control system, and the weighing mechanism, the sand-mixing mechanism and the core-making mechanism may be connected in sequence.

Optionally, the weighing mechanism can include a weighing bucket 210 and a weighing sensor 220, and the weighing sensor 220 can be provided in the weighing bucket 210 and can be signally connected to the control system;

The sand mixing mechanism may include a sand mixing cylinder 310, and a first feeding port 320 and a second feeding port 330 both used for adding the binder. The first feeding port 320 and the second feeding port 330 may both be provided in the sand mixing cylinder 310. Alternatively, the first feeding port 320 may be provided in the weighing hopper 210 , and the second feeding port 330 may be provided in the sand mixing cylinder 310 .

As shown in Figure 1, the weighing mechanism, the sand mixing mechanism and the core making mechanism can be arranged in sequence from top to bottom and communicated with each other. The control system may include a PLC (Programmable Logic Controller, full English name: Programmable Logic Controller) controller. Specifically, the PLC controller 110 may be signal-connected to the weighing mechanism, the sand mixing mechanism, and the core-making mechanism, respectively. The PLC controller 110 According to the working conditions of each round of production, the weighing mechanism can be controlled to weigh the raw materials, the weighed raw materials are added to the sand mixing mechanism, and the sand mixing mechanism can add the mixed core sand formed by mixing to the core making mechanism. Sand core can be made.

Optionally, the weighing mechanism may include a weighing bucket 210 and a weighing sensor 220. The weighing sensor 220 may be provided in the weighing bucket 210 and may be signally connected to the control system.

As shown in FIG. 1 , the weighing hopper 210 can be in the shape of a funnel and can be arranged in a vertical direction. The weighing sensor 220 and the weighing hopper 210 can both be installed on the support frame. A measuring plate is provided, and the number of the weighing sensors 220 can be two, and the two weighing sensors 220 can be arranged on both sides of the weighing hopper 210 and can be in contact with the corresponding measuring plates. In the process of weighing raw sand, raw sand can be added to the weighing hopper 210, and the weighing sensor 220 can detect the weight of the raw sand in the weighing hopper 210 in real time, and can transmit the detected weight to the PLC controller 110. When the weight of the sand reaches the required weight, the PLC controller 110 can control to stop adding raw sand to the weighing hopper 210, and can make the raw sand weighed in the weighing hopper 210 be added to the sand mixing mechanism.

Optionally, the discharge port of the weighing hopper 210 may be provided with a first discharge valve, and the first discharge valve may be signally connected to the control system.

Specifically, the lower end of the weighing hopper 210 can be its discharge port, the discharge port of the weighing hopper 210 can be communicated with the feeding port of the sand mixing mechanism, and the first discharge valve can be provided at the discharge port for controlling The opening or closing of the outlet. When the weight of the raw sand reaches the required weight, the PLC controller 110 can control to stop adding raw sand to the weighing hopper 210. When the core sand needs to be mixed, the PLC controller 110 can control the first discharge valve to open, and the weighing hopper can be opened. The raw sand in 210 can enter the sand mixing mechanism to realize the automatic addition of raw sand to the sand mixing mechanism.

In some embodiments, as shown in FIG. 2 , the sand mixing mechanism may include a sand mixing cylinder 310 , and a first feeding port 320 and a second feeding port 330 , both of which are used for adding the binder. The first feeding port 320 and the

second feeding port

320 and 330 The feeding ports 330 may all be provided in the sand mixing cylinder 310 .

The sand mixing cylinder 310 can be arranged below the weighing hopper 210, and the feeding port of the sand mixing cylinder 310 can be arranged opposite to the discharging port of the weighing hopper 210, and both the first feeding port 320 and the second feeding port 330 can be provided. At the feeding port of the sand mixing cylinder 310 , the first feeding port 320 and the second feeding port 330 can be respectively used for adding different components of binders into the sand mixing cylinder 310 .

When mixing the core sand, the first feeding port 320 and the second feeding port 330 can add the first binder and the second binder to the sand mixing cylinder 310 at the same time, and can be mixed with the original sand. The amount of the mixed core sand prepared by the sand barrel 310 can be the required amount for core making, which can ensure that it is mixed and used immediately.

In other embodiments, as shown in FIG. 3 , the weighing mechanism may include a weighing bucket 210 and a weighing sensor 220, and the weighing sensor 220 may be provided in the weighing bucket 210 and may be signally connected to the control system;

The sand mixing mechanism may include a sand mixing cylinder 310, and a first feeding port 320 and a second feeding port 330 both used for adding the binder. The first feeding port 320 may be provided in the weighing hopper 210, and the second feeding port 330 may be Set in the sand mixing cylinder 310 .

When mixing the core sand, the first binder can be added to the weighing hopper 210 through the first feeding port 320, and more single-component materials can be mixed for use. The divided materials are added from the weighing hopper 210 to the sand mixing cylinder 310, and the second binder is added to the sand mixing cylinder 310 through the second feeding port 330, and the mixed core sand is obtained after final mixing.

The main reason why the mixed core sand will slowly solidify is that the two-component binder in the mixed core sand is gradually cured after chemical reaction, so the prepared mixed core sand should be used as soon as possible; when the original sand is put into a binder (or Additives) are mixed first, and one of the binder mixtures does not cure too quickly and has a longer durability.

Optionally, the outlet of the sand mixing cylinder 310 may be provided with a sand discharging valve 340 and a sand lowering channel 350 , and the sand discharging valve 340 may be connected with a signal of the control system for controlling the distance between the sand mixing cylinder 310 and the sand lowering channel 350 . Connect or disconnect.

As shown in FIG. 1 , the lower sand channel 350 can be connected to the discharge port of the sand mixer 310 and can be arranged in the vertical direction. The sand discharge valve 340 can be installed at the discharge port of the sand mixer 310 and can be connected with the PLC The controller 110 is signally connected. When the mixed core sand needs to be added to the core making mechanism, the PLC controller 110 can control the sand discharge valve 340 to open, and the mixed core sand in the sand mixing cylinder 310 can enter the core making mechanism through the sand lowering channel 350, so as to automatically send the core sand to the core making mechanism. Add mixed core sand to the mechanism.

Optionally, the lower end of the sand lowering channel 350 may be provided with a sand level sensor 360 that is signally connected to the control system, and the sand level sensor 360 may be used to detect the material level in the core making mechanism.

Specifically, the sand level sensor 360 can be installed at the lower end of the sand lower channel 350 and can be connected to the PLC controller 110 by signal. Material level in the core mechanism. When the sand measuring material level sensor 360 detects that the raw sand material level of the core making mechanism is at the "sand can be discharged" material level, the sand discharge valve 340 on the sand mixing cylinder 310 can be opened, and the mixed core sand in the sand mixing cylinder 310 can be opened. It is added to the core making mechanism, and at the same time, the sand level sensor 360 detects the final mixed core sand position and transmits it to the PLC controller 110, which calculates the next sand mixing amount and prepares the mixed sand.

Optionally, the core-making mechanism may include a core-making unit sand barrel 410 , a core-making core box 420 and a data reading device 430 , and the core-making unit sand barrel 410 may be located below the sand lowering channel 350 and may be used to mix the cores The sand is transported to the core-making core box 420 , and the data reading device 430 may be provided in the core-making core box 420 .

As shown in FIG. 1 , the core-making unit sand barrel 410 may be arranged below the sand mixing barrel 310, and the feeding port of the core-making unit sand barrel 410 may be arranged opposite to the lower sand channel 350. The core-making unit sand may be used for The mixed core sand is delivered to the core-making core box 420 , and the data reading device 430 can be used to read the relevant data and transmit it to the PLC controller 110 .

Optionally, the core making unit may further include a sand storage bucket 500, and the sand storage bucket 500 may be provided above the weighing mechanism.

As shown in FIG. 1 , the sand storage hopper 500 can be arranged above the weighing hopper 210 , the outlet of the sand storage hopper 500 can be arranged opposite to the inlet of the weighing hopper 210 , and the outlet of the sand storage hopper 500 can be A second discharge valve is provided, and the second discharge valve can be signally connected with the PLC controller 110 .

When the raw sand needs to be added to the weighing hopper 210, the PLC controller 110 can control the second discharge valve to open, the raw sand in the sand storage hopper 500 can be added to the weighing hopper 210, and the weighing sensor 220 can be used for the weighing hopper. The weight of the raw sand in the weighing hopper 210 is weighed. When the raw sand in the weighing hopper 210 reaches the required amount, the PLC controller 110 can control the second discharge valve to close, stop adding raw sand to the weighing hopper 210, and realize automatic feeding. Raw sand is added to the weighing hopper 210 .

Compared with the core-making unit in the related art that stores the mixed core sand after mixing, the core-making unit provided by the embodiment of the present application omits the transitional sand storage bucket 500, and the weighing mechanism weighs one or more times each time. The raw sand required by the core, and the weighed raw sand is added to the sand mixing mechanism for mixing to make mixed core sand. In addition, because the transition sand storage hopper 500 is omitted, the detection switch and structure are saved, and the overall height of the core-making unit is reduced, reducing the occupied space. space.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present application. scope.

Industrial Applicability

The application provides a core-making process and a core-making unit, which relate to the technical field of sand core making. The core-making process provided by the application includes: calculating the weight of the core sand to be mixed once according to the information of the sand core made; The cementing agent is mixed to prepare the mixed core sand; the height of the feeding material level in the sand barrel of the core making unit is calculated and calibrated; The core-making process is easy to cause technical problems of poor quality of core sand.

Furthermore, it will be appreciated that the core making process and core making unit of the present application are reproducible and can be applied in a variety of industrial applications. For example, the core making unit of the present application can be applied to a core making process.

Claims

A core making process is characterized in that, comprising:

Calculate the weight of the core sand to be mixed once according to the sand core information;

Mixing raw sand and binder to prepare mixed core sand;

The mixed core sand is directly added to the core making unit.
The core-making process according to claim 1, wherein the calculating the weight of the core sand to be mixed once comprises:

Calculate the sand core modulus that can be produced after mixing according to the time for making a sand core and the time that the mixed core sand can be stored;

The weight of the mixed core sand is calculated according to the manufacturable sand core modulus and the weight of the single-mould sand core.
The core-making process according to claim 1 or 2, wherein the mixing of the raw sand and the binder comprises:

The sand mixing parameters are set according to the weight of the sand core and the technological formula, and the sand mixing parameters include the addition amount of the original sand, the addition amount of the binder, the addition amount of the auxiliary materials and the sand mixing time.
The core making process according to claim 3, wherein the setting of the sand mixing parameters according to the weight of the sand core and the process formula comprises: σ=gs/Gs, wherein σ is an adjustable parameter, and gs is The weight of the binder, Gs is the weight of the core sand.
The core-making process according to claim 3 or 4, wherein the setting of the sand mixing parameters according to the weight of the sand core and the process formula includes: GH≤K*Gh, wherein GH is the value of the mixed core sand Weight; K is the coefficient, Gh is the weight of core sand required for each mold.
The core-making process according to any one of claims 1 to 5, wherein the mixing of the raw sand and the binder comprises: mixing one or more binders with the raw sand to make Mixed core sand.
The core-making process according to any one of claims 1 to 5, wherein the mixing of the raw sand and the binder comprises: firstly mixing the raw sand with the first binder or auxiliary material to prepare The single-component material is prepared for use, and when the core-making needs to use mixed core sand, a second binder is added to the single-component material.
The core-making process according to any one of claims 1 to 7, wherein the core-making process further comprises: before directly adding the mixed core sand into the core-making unit, adding the core-making unit sand The height of the feeding level in the barrel is calculated and calibrated.
A core-making unit is characterized in that it comprises: a control system, and a weighing mechanism, a sand mixing mechanism and a core-making mechanism respectively signally connected to the control system, the weighing mechanism, the sand mixing mechanism and the The core-making mechanisms are communicated in sequence.
The core-making unit according to claim 9, wherein the weighing mechanism comprises a weighing hopper (210) and a weighing sensor (220), and the weighing sensor (220) is provided in the weighing hopper (210), and is signally connected to the control system.
The core-making unit according to claim 9 or 10, characterized in that, the sand mixing mechanism comprises a sand mixing cylinder (310), and a first feeding port (320) and a second feeding port both used for adding a binder The first feeding port (320) and the second feeding port (330) are both provided in the sand mixing cylinder (310), or the first feeding port (320) is provided in the The weighing hopper (210) and the second feeding port (330) are provided in the sand mixing cylinder (310).
The core-making unit according to claim 11, characterized in that, when both the first feeding port (320) and the second feeding port (330) are provided in the sand mixing cylinder (310), The first binder and the second binder are simultaneously fed into the sand mixing cylinder (310) through the first feeding port (320) and the second feeding port (330).
The core-making unit according to claim 11, characterized in that the first feeding port (320) is provided in the weighing hopper (210) and the second feeding port (330) is provided in the mixing hopper (330). In the case of the sand cylinder (310), the first binder is added to the weighing hopper (210) through the first feeding port (320), and the second binder is fed through the second feeding port (320). 330) is added to the sand mixing drum (310).