DE212019000518U1 - Device for testing the strength of sand cores - Google Patents

Abstract

Sand core strength testing apparatus applicable to a core making apparatus comprising a core box, characterized in that a testing device is further included; wherein one end of the testing device is located in the core box, and the end of the testing device is able to press against a sand core head in the core box, and the testing device is able to move relative to the core box while the end of the testing device is moving to compressing the sand core head within the core box so that a distance traveled by the tester is obtained.

Description

technical field

The present disclosure relates to the technical field of sand core testing, and more particularly to a sand core strength testing apparatus.

Technical background

In the foundry industry, the strength testing of sand cores during core production is always carried out in the laboratory.

Strength testing of sand cores is considered a monitoring method. However, strength testing of sand cores in the lab indicates on-site core making already at the manufacturing facility, which means core making is carried out in the normal way even if the strength of sand cores is unqualified. As a result, partial sand cores with actually unqualified strength flow into a downstream work process, which finally affects the casting quality.

subject of revelation

The present disclosure provides a sand core strength testing apparatus, which can realize at least one of the technical effects that each sand core is tested online during sand core manufacturing, so that inflow of unqualified sand cores into a downstream process can be avoided.

• Eine Ausführungsform der vorliegenden Offenbarung stellt eine Vorrichtung zur Festigkeitsprüfung von Sandkernen bereit, die anwendbar auf eine Kernherstellungsvorrichtung ist, wobei die Kernherstellungsvorrichtung einen Kernkasten umfasst, und eine Prüfvorrichtung ist noch enthalten;
• Ein Ende der Prüfvorrichtung ist in dem Kernkasten angeordnet, und das Ende der Prüfvorrichtung ist in der Lage, sich an einen Sandkernkopf in dem Kernkasten anzudrücken, und die Prüfvorrichtung ist fähig, sich relativ zu dem Kernkasten zu bewegen, während das Ende der Prüfvorrichtung zum Zusammendrücken des Sandkernkopfs innerhalb des Kernkastens konfiguriert wird, so dass eine von der Prüfvorrichtung zurückgelegte Strecke erhalten wird.

Embodiments of the present disclosure can be performed as follows:

• An embodiment of the present disclosure provides a sand core strength testing apparatus applicable to a core making apparatus, wherein the core making apparatus includes a core box, and a testing apparatus is still included;
• One end of the tester is placed in the core box, and the end of the tester is able to press against a sand core head in the core box, and the tester is able to move relative to the core box while the end of the tester to compress of the sand core head is configured within the core box so that a distance traveled by the tester is obtained.

Optionally, the test device includes an extruder mechanism, a pendulum mechanism, and a test mechanism;

The pendulum mechanism and the extruder mechanism are both located inside the core box, the extruder mechanism communicates with one end of the pendulum mechanism, while the end of the extruder mechanism opposite the pendulum mechanism is configured to compress the sand core head inside the core box, and the test mechanism is on the pendulum mechanism and is configured to determine a distance traveled by the pendulum mechanism.

Optionally, the core box is provided with a test port and the shuttle mechanism is located in the test port and is in sealed communication with the test port.

Optionally, the pendulum mechanism includes a power assembly, a push rod, and a sealing ring;

The seal ring is located in the test port and the seal ring is in sealed communication with the test port, the power assembly and push rod are located in the seal ring, and the power assembly is drivingly connected to the push rod and the end of the push rod located in the core box is in communication connected to the extruder mechanics.

Optionally, the end of the test channel remote from the extruder mechanics is provided with a sealing plate, the push rod is configured to pass through the sealing plate, and the push rod is movable back and forth relative to the sealing plate.

Optionally, the power assembly includes a cylinder and an elastic member;

The cylinder communicates with the opposite end of the push rod from the extruder mechanism, the elastic member is sheathed around the outside of the push rod, and both ends of the elastic member abut the extruder mechanism and the sealing plate, respectively, and the cylinder is used to displace the elastic element is configured in a compressed state such that the elastic element has an elastic tendency to move the push rod towards the extruder mechanics.

Optionally, the cylinder is provided with a sealing chamber and one end of the push rod is located in the sealing chamber.

Optionally, a stop is provided in the sealing chamber that is configured to abut the push rod; and the stop is configured such that the extruder mechanics abut the sand core head within the core box.

Optionally, the test mechanism is a distance sensor.

Optionally, the extruder mechanism includes an extruder head and a connecting section;

The extruder head is connected to the pendulum mechanism via the connecting portion, and the extruder head abuts the sand core head inside the core box.

Optionally, the extruder head is cone-shaped and is configured such that the tip of the extruder head abuts the sand core head within the core box.

• Mischen von Rohmaterialien zur Sandkernherstellung, und Durchführen von Formschließ- und Kernschießprozessen;

Furthermore, a method for strength testing of sand cores is described, which includes the following steps:

• Mixing raw materials for sand core production, and performing mold closing and core shooting processes;

solidifying the shot sand core by blowing triethylamine;

performing a strength test on the solidified sand core to obtain a distance traveled by the tester by compressing the sand core head in the core box by a tester;

recording the traveled distance and, according to the traveled distance, deciding whether the sand core has a qualified strength; and

Opening the mold and taking out the sand core with strength proved to be qualified by testing, completing the manufacturing of the sand core.

• Mitbringen einer Extrudermechanik durch eine Shuttlemechanik, den Sandkernkopf innerhalb des Kernkastens in dem Prüfkanal innerhalb des Kernkastens zusammenzudrücken; und

Optionally, the step of compressing the sand core head in the core box using a testing device includes the following sub-steps:

• bringing along an extruder mechanism by a shuttle mechanism to compress the sand core head inside the core box in the test channel inside the core box; and

Obtaining a distance traveled by the shuttle mechanic by determining a path of travel of the shuttle mechanic.

• Mitbringen der Schubstange der Shuttlemechanik zum Bewegen nach einer eindeutigen Richtung durch den Druck einer Kraftbaugruppe während des Startprozesses der Shuttlemechanik, wobei der Druck der Kraftbaugruppe der Shuttlemechanik bekannt ist; und
• Mitbringen des Extruderkopfs der Extrudermechanik durch die Schubstange der Shuttlemechanik, sich in Richtung auf den Sandkernkopf innerhalb des Kernkastens zu bewegen und den Sandkernkopf zusammenzudrücken.

Optionally, the step of bringing an extruder mechanism along with a shuttle mechanism includes the following sub-steps:

• causing the push rod of the shuttle mechanism to move in a unique direction by the pressure of a power assembly during the starting process of the shuttle mechanism, the pressure of the power assembly of the shuttle mechanism being known; and
• Bringing the extruder head of the extruder mechanism by the push rod of the shuttle mechanism to move towards the sand core head inside the core box and compress the sand core head.

• Starten des Zylinders der Kraftbaugruppe, und Konfigurieren der Schubstange, so dass ein um die Außenseite der Schubstange herum ummanteltes elastisches Element zusammengepresst ist, wobei der Druck des zusammengepressten elastischen Elements bekannt ist;

Optionally, the power assembly start-up process includes:

• starting the cylinder of the power assembly, and configuring the push rod so that a resilient member sheathed around the outside of the push rod is compressed, the pressure of the compressed resilient member being known;

stopping the cylinder of the power assembly, releasing the elastic member, and entraining the push rod to move toward the sand core head by converting elastic potential energy of the elastic member into kinetic energy until stopped;

measuring a distance traveled by the push rod and determining sand core strength; and

Repeat above steps to perform online check for each sand core.

• Erhalten einer Federkraft durch Multiplizieren des Elastizitätskoeffizienten des elastischen Elements mit der von der Prüfvorrichtung zurückgelegten Strecke, wobei der Elastizitätskoeffizient des elastischen Elements der Kraftbaugruppe bekannt ist, und eine Konfiguration derart realisiert wird, dass es anhand des Zahlenbereichs der Federkraft zu entscheiden ist, ob der Sandkern eine qualifizierte Festigkeit besitzt.

Optionally, the step of deciding whether the sand core has a qualified strength based on the distance traveled includes the following sub-step:

• Obtaining a spring force by multiplying the coefficient of elasticity of the elastic member by the distance traveled by the tester, knowing the coefficient of elasticity of the elastic member of the force assembly, and realizing a configuration such that it is to decide whether the sand core based on the numerical range of the spring force has a qualified strength.

The present disclosure has the following advantageous effects, for example: the tester is able to press against a sand core head inside the core box; if the test device with a certain pressure towards moves the inside of the core box, the testing device then compresses the sand core head so that a distance traveled by the testing device can be obtained; since the pressure applied by the tester to the sand core head can be set and known in advance, and the compressive force applied to the sand core head each time also remains the same, a traveled distance for determining a qualified sand core strength is available through experiments of limited amount, accordingly, the strength can be during of the manufacture of each sand core can be checked on-line by comparing a distance traveled each time by the tester with the distance traveled to determine a qualified sand core strength, thereby avoiding the flow of unqualified sand cores to a downstream process, reducing the scrap of castings, and the casting quality is guaranteed.

character list

• 1 ist eine schematische Darstellung zeigend die Gesamtstruktur einer Vorrichtung zur Festigkeitsprüfung von Sandkernen nach einer Ausführungsform der vorliegenden Offenbarung;
• 2 ist eine schematische Strukturdarstellung zeigend das Zusammendrücken eines Sandkernkopfs durch eine Vorrichtung zur Festigkeitsprüfung von Sandkernen nach einer Ausführungsform der vorliegenden Offenbarung; und
• 3 ist eine schematische Darstellung zeigend partielle Struktur einer Vorrichtung zur Festigkeitsprüfung von Sandkernen nach einer Ausführungsform der vorliegenden Offenbarung.

In order to more clearly describe technical solutions of the embodiments of the present disclosure, drawings necessary for the embodiments are briefly introduced below; and it is to be understood that the following drawings show only some embodiments of this disclosure and therefore should not be taken as limitations on the scope, and other related drawings may be obtainable from these drawings by those skilled in the art without the use of the inventive faculty.

• 1 12 is a schematic diagram showing the overall structure of a sand core strength testing apparatus according to an embodiment of the present disclosure;
• 2 12 is a schematic structural diagram showing crushing of a sand core head by a sand core strength testing apparatus according to an embodiment of the present disclosure; and
• 3 12 is a schematic diagram showing a partial structure of a sand core strength testing apparatus according to an embodiment of the present disclosure.

Reference List

100

core box;

200

sand core head;

300

testing device;

400

extruder mechanics;

401

extruder head;

402

connection section;

500

pendulum mechanism;

501

power assembly;

511

Cylinder;

521

elastic element;

502

push rod;

503

sealing ring;

600

test mechanics;

700

test channel;

800

sealing sheet;

900

sealing chamber; and

110

Attack.

Detailed description of the embodiments

In order to make the objects, the technical solutions, and the advantages of the embodiments of the present disclosure clearer, technical solutions in the embodiments of this disclosure are to be described clearly and comprehensively below with reference to the drawings in the embodiments of this disclosure, and obviously those described are Embodiments only provide partial embodiments, rather than all of the embodiments of this disclosure. In general, the assemblies of the embodiments of the present disclosure described and illustrated herein in the drawings can be arranged and configured in a number of different configurations.

Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is intended to illustrate only selected embodiments of this disclosure rather than to limit the claimed scope of the present disclosure. All other embodiments that would be obtainable by those skilled in the art based on the embodiments in this disclosure without the use of an inventive step fall within the scope of the present disclosure.

It should be noted that similar reference numbers and letters in the following drawings refer to similar items and therefore an item need not be further defined and explained in subsequent drawings once the item has been defined in a drawing.

In the explanation of the present disclosure, it is to be explained that orientation or Positional relationships indicated by terms such as "inside" and "outside" are orientation or positional relationships shown based on the drawings, or orientational or positional relationships in which a product of this disclosure is conventionally placed, and the terms are for convenience only explanation of the disclosure and for ease of explanation, rather than to indicate or suggest that the mentioned device or element should have a specific orientation and be constructed and operated in a specific orientation, and therefore should not be taken as limitations on the disclosure. Furthermore, terms such as "first-" and "second-" are for purposes of distinct explanation only, and should not be construed as implying or implying any importance in relativity.

In the explanation of this disclosure, it is to be further explained that terms such as "arranging" and "connecting" should be understood in a broad sense, unless otherwise expressly stated and defined. For example, it could be either a fixed connection, or a detachable connection, or an integral connection; it could be either a mechanical connection or an electrical connection; and it could be either a direct connection, or an indirect connection through an intermediate link, or an internal communication between two elements. For those skilled in the art, the specific meanings of the above terms in this disclosure could be understood according to specific circumstances.

like it in 1-3 1, an embodiment of the present disclosure provides a sand core strength testing apparatus 300 applicable to a core making apparatus, the core making apparatus including a core box 100, and a testing apparatus 300 is still included; one end of the tester 300 is placed in the core box 100, and the end of the tester 300 is able to press against a sand core head 200 in the core box 100, and the tester 300 is able to move relative to the core box 100, while configuring the end of the tester 300 to compress the sand core head 200 within the core box 100 so that a distance traveled by the tester 300 is obtained.

The following explanations are to be made: the testing apparatus 300 provided in this embodiment of the present disclosure is present in the core box 100; and a sand core in the core box 100 is in an operation between solidification by blowing triethylamine and mold opening and then core extraction when starting the testing apparatus 300, thereby realizing an online test for sand core strength; and mold opening and core removal operations are performed only after the strength of a sand core is determined to be qualified by the inspection apparatus 300.

Here, the test is performed on a sand core head 200 by the test device 300 as follows: a sand core head 200 inside the core box 100 is compressed by the test device 300, a certain pressure is set in the test device 300, and under this certain pressure, it is tested according to the the distance traveled by the testing device 300 inside the core box 100, whether the sand core head 200 has a qualified strength; due to the compression of the sand core head 200 inside the core box 100 by the testing jig 300, the strength of the sand core head 200 will oppose the testing jig 300 optionally, thereby preventing the movement of the testing jig 300; for this reason, it can be decided whether the sand core inside the core box 100 has a qualified strength depending on the size of the distance traveled by the testing device 300 when the testing device 300 compresses the sand core head 200 inside the core box 100 with the specified pressure.

Preferably, the testing device 300 can be in electrical signal communication with an external control device; in this case an initial pressure for the tester 300 is entered into the external controller and a qualified range given for the distance traveled under that pressure; then the strength of the sand core located inside the core box 100 is proved to be qualified when the distance traveled by the tester 300 relative to the core box 100 is less than or equal to the predetermined qualified range of traveled distance; conversely, if the distance traveled by the tester 300 relative to the core box 100 is greater than the predetermined qualified range of traveled distance, the strength of the sand core located inside the core box 100 is determined to be unqualified.

Moreover, also in the testing device 300, an instant decision can be made, i.e., an online test of the sand core strength can also be made possible by human decision as long as a qualified range of the traveled distance under that pressure is given.

Optionally, the tester 300 can then compress a sand core head 200 located inside the core box 100 by using a hydraulic cylinder or a motor to drive an extruder mechanism 400; specifically, a certain compressive force is applied by a driving mechanism inside the tester 300 within one second, and in this case, the compressive force is generated instantaneously and then disappears instantaneously, then the distance traveled by the tester 300 in the core box 100 serves as a basis for judgment, whether the sand core in the core box 100 has a qualified strength.

The present disclosure has the following advantageous effects, for example: the tester 300 is able to press against a sand core head 200 inside the core box 100; if the tester 300 moves toward the inside of the core box 100 with a certain pressure, then the tester 300 compresses the sand core head 200 so that a distance traveled by the tester 300 is obtained; since the pressure of the testing device 300 is known and the compressive force exerted on the sand core head 200 each time also remains the same, a distance traveled to establish a qualified sand core strength is available through limited quantity experiments, accordingly, the strength can be checked online during the manufacture of each sand core by a distance traveled by the testing device 300 each time is compared with the traveled distance to determine a qualified sand core strength, thereby avoiding the flow of unqualified sand cores into a downstream process, reducing the scrap of castings, and ensuring casting quality.

Optionally, the test device 300 comprises an extruder mechanism 400, a pendulum mechanism 500, and a test mechanism 600; the pendulum mechanism 500 and the extruder mechanism 400 are both arranged inside the core box 100, the extruder mechanism 400 is connected to one end of the pendulum mechanism 500, while the end of the extruder mechanism 400 facing away from the pendulum mechanism 500 is configured to compress the sand core head 200 within the core box 100 and the test mechanism 600 is arranged on the shuttle mechanism 500 and is configured to determine a distance traveled by the shuttle mechanism 500 .

The extruder mechanism 400 serves as a structure lying directly against the sand core head 200; if the shuttle mechanism 500 is not started, the extruder mechanism 400 is now just abutting the sand core head 200 inside the core box 100, and there is currently no extruding force between the extruder mechanism 400 and the sand core head 200; when starting the shuttle mechanism 500, an acting force is instantaneously applied to the extruder mechanism 400 toward the inside of the core box 100; and by arranging the testing device 300 on the shuttle mechanism 500, a distance traveled by the shuttle mechanism 500 can be determined in real time, and due to the connection between the shuttle mechanism 500 and the extruder mechanism 400, the distance traveled by the shuttle mechanism 500 now represents that of the extruder mechanism 400 distance covered.

Optionally, the core box 100 is provided with a test port 700 and the shuttle mechanism 500 is placed in the test port 700 and is in sealed communication with the test port 700 .

In order to favor the movement of the pendulum mechanism 500 of the test device 300 in the core box 100, a test channel 700 is optionally provided in the core box 100, and a sealing ring 503 is provided in the test channel 700, thereby ensuring internal tightness in the core box 100; and the tester 300 is rectangular in cross section.

Optionally, the pendulum mechanism 500 includes a power assembly 501, a push rod 502, and a sealing ring 503; the sealing ring 503 is arranged in the test channel 700 and the sealing ring 503 is in sealed connection with the test channel 700, the force assembly 501 and the push rod 502 are arranged in the sealing ring 503, and the force assembly 501 is in driving connection with the push rod 502, and that The end of the push rod 502 located inside the core box 100 is connected to the extruder mechanism 400 .

Optionally, push rod 502 serves as an interconnecting mechanism between power assembly 501 and extruder mechanics 400, and push rod 502 is configured such that an applied force is transmitted from power assembly 501 to extruder mechanics 400; preferably, the checking mechanism 600 is arranged on the push rod 502 and the checking mechanism 600 can determine a distance traveled by the push rod 502 and then determine the distance traveled by the extruder mechanism 400 .

Optionally, the sealing ring 503 could be a rubber sealing ring 503 or an elastic sealing ring 503 or the like.

A T-shaped rod is preferably used as the push rod 502 .

Optionally, the end of the test channel 700 facing away from the extruder mechanism 400 is provided with a sealing plate 800 , the push rod 502 is configured to pass through the sealing plate 800 , and the push rod 502 can be moved back and forth relative to the sealing plate 800 .

Because the test port 700 allows for an open condition of the core box 100 and the external environment, a sealed environment within the core box 100 is maintained by placing a sealing plate 800 at the end of the test port remote from the extruder mechanics 400; Optionally, the sealing plate 800 can be connected to the outside of the core box 100 in various ways, e.g. by screw connection, rivet connection, welding, etc.

Optionally, the sealing plate 800 is provided with a through hole so that the push rod 502 can pass through the sealing plate 800 and the push rod 502 can then be moved back and forth relative to the sealing plate 800 .

Optionally, the power assembly 501 includes a cylinder 511 and an elastic member 521; the cylinder 511 is connected to the end of the push rod 502 facing away from the extruder mechanism 400, the elastic element 521 is sheathed around the outside of the push rod 502 and both ends of the elastic element 521 rest against the extruder mechanism 400 and the sealing plate 800 , and the cylinder 511 is configured to place the elastic member 521 in a compressed state such that the elastic member 521 has an elastic tendency to move the push rod 502 toward the extruder mechanism 400.

Optionally, the cylinder 511 and the elastic element 521 can control two states of the testing device 300 . In this case, the cylinder 511 is inflated, as shown in 1 As shown, the extruder mechanism 400 and elastic member 521 are brought by the push rod 502 to move in a direction away from the sand core head 200, the elastic member 521 now being compressed. Further, the cylinder 511 is blown out instantaneously when the solidification step is completed by blowing triethylamine for the sand core as shown in FIG 2 will be shown. In this case, the elastic member 521 is released and the push rod 502 urges the extruder mechanism 400 to compress the sand core head 200 forward, creating a distance H traveled. In addition, the testing mechanism 600 on the push rod 502 is able to determine the distance H covered and to output and display the distance H covered. In this case, since the elastic member 521 is a predetermined part of the test apparatus 300, the elastic coefficient K of the elastic member 521 is known. A spring force F=K*H during the movement of the elastic element 521 can be determined immediately after the test mechanism 600 has determined the distance H covered by the extruder mechanism 400 . Because the strength of the sand core head 200 counteracts an elastic force to the elastic member 521, it can be judged whether the sand core head 200 has a qualified strength depending on the magnitude of the elastic force. Alternatively, it can be further intuitively judged whether the sand core head 200 has a qualified strength immediately after whether the traveled distance H satisfies the qualified range obtained through limited quantity experiments when the elastic member 521 has the same substantial elastic pressure.

It is to be explained that a compression spring is used as the elastic member 521, therefore, the calculation formula for the elastic coefficient K of the compression spring is a conventional formula in the field, about which no repeated description needs to be made.

Optionally, the cylinder 511 is provided with a sealing chamber 900, and an end of the push rod 502 is disposed in the sealing chamber 900, and a stop 110 is provided in the sealing chamber 900, which is configured to abut the push rod 502 and is configured to do so that the extruder mechanism 400 rests against the sand core head 200 within the core box 100.

In order to ensure that the extruder mechanism 400 is just in contact with the sand core head 200 inside the core box 100 when the cylinder 511 brings the push rod 502 and the extruder mechanism 400 with it for retraction into the sealing chamber 900, a stop 110 is provided inside the sealing chamber 900, which can regulate the distance between the extruder mechanism 400 and the sand core head 200 inside the core box 100.

Optionally, the testing mechanism 600 is a distance sensor.

like it in 1 As shown, the extruder mechanics 400 optionally includes an extruder head 401 and a connecting portion 402; the extruder head 401 is connected to the pendulum mechanism 500 via the connecting portion 402, and the extruder head 401 abuts against the sand core head 200 within the core box 100. Optionally, the extruder head 401 is cone-shaped and is configured such that the tip of the extruder head 401 rests against the sand core head 200 within the core box 100.

To facilitate compression by the extruder head 401 toward the interior of the sand core head 200, the extruder head 401 is conical and is configured such that the tip of the extruder head 401 abuts the sand core head 200 within the core box 100.

The present disclosure provides a method for testing the strength of sand cores, comprising the steps of: mixing raw materials for sand core production, and performing mold closing and core shooting processes; solidifying the shot sand core by blowing triethylamine; performing a strength test on the solidified sand core to obtain a distance traveled by a tester 300 by compressing the sand core head 200 in the core box 100 by the tester 300; recording the distance traveled and deciding whether the sand core has qualified strength; and opening the mold and taking out the sand core with strength proven to be qualified by testing, thereby completing the manufacture of the sand core.

Optionally, the step of compressing the sand core head 200 in the core box 100 using the testing device 300 includes the following sub-steps: Bringing an extruder mechanism 400 by a shuttle mechanism to compress the sand core head 200 inside the core box 100 in the test channel 700 inside the core box 100; and obtaining a distance traveled by the shuttle mechanism by determining a movement path of the shuttle mechanism.

Optionally, the step of entraining an extruder mechanism 400 by a shuttle mechanism includes the following sub-steps: entraining the push rod 502 of the shuttle mechanism to move in a unique direction by the pressure of a force assembly 501 during the shuttle mechanism starting process, the pressure of the shuttle mechanism force assembly 501 being known; and bringing the extruder head 401 of the extruder mechanism 400 along by the push rod 502 of the shuttle mechanism to move toward the sand core head 200 inside the core box 100 and compress the sand core head 200.

Optionally, the starting process of the power assembly 501 includes: starting the cylinder 511 of the power assembly 501, and configuring the push rod 502 so that a resilient element 521 sheathed around the outside of the push rod 502 is compressed, the pressure of the compressed resilient element 521 being known; stopping the cylinder 511 of the power assembly 501, releasing the elastic member 521, and bringing along the push rod 502 to move toward the sand core head 200 by converting elastic potential energy of the elastic member 521 into kinetic energy until stopped; measuring a distance traveled by the push rod 502 and determining the sand core strength; and repeating the above steps to perform online testing for each sand core.

Optionally, the step of deciding whether the sand core has a qualified strength includes the following sub-step: Obtaining a spring force by multiplying the coefficient of elasticity of the elastic element 521 by the distance traveled by the testing device 300, where the coefficient of elasticity of the elastic element 521 of the force assembly 501 is known , and a configuration is realized in such a way that it is to be decided based on the numerical range of the spring force whether the sand core has a qualified strength.

As an example, the use of a cylindrical coil spring as the elastic member 521 is given; specifically, because the coefficient of elasticity of the spring used was known, the spring could be compressed by 2 mm under the action of 2Pa; if the spring was released from the cylinder 511, the spring brought the extruder mechanism 400 to compress the sand core head 200 forward, generating a traveled distance of 0-2mm, indicating a qualified strength of the sand core head 200.

In this embodiment of the present disclosure, the push rod 502 brings the extruder mechanics 400 and the elastic element 521 to move in a direction away from the sand core head 200 by inflating the cylinder 511 of the power assembly 501, the elastic element 521 is now compressed. In other words, the test apparatus 300 is in a state to be tested. Further, the cylinder 511 can be instantaneously blown out by electric signal control or manual control when the solidification step by blowing triethylamine for the sand core is completed. In this case, the elastic member 521 is released and the push rod 502 urges the extruder mechanism 400 to compress the sand core head 200 forward, creating a distance H traveled. In addition, the testing mechanism 600 on the push rod 502 is able to determine the distance H covered and to output and display the distance H covered. Since the elastic member 521 is a given ner is part of the test device 300, the elasticity coefficient K of the elastic element 521 is known in this case. A spring force F=K*H during the movement of the elastic element 521 can be determined immediately after the test mechanism 600 has determined the distance H covered by the extruder mechanism 400 . Because the strength of the sand core head 200 counteracts an elastic force to the elastic member 521, it can be judged whether the sand core head 200 has a qualified strength depending on the magnitude of the elastic force.

Described above are only preferred embodiments of the present disclosure, which are not configured to limit this disclosure, and the present disclosure could be variously changed and modified for those skilled in the art. Anything made of the spirit and principle of the present disclosure should fall within the scope of this disclosure.

Commercial Applicability

In the sand core strength testing apparatus provided in embodiments of the present disclosure, the strength can be checked online during the manufacture of each sand core by the testing apparatus, thereby avoiding the inflow of unqualified sand cores into a downstream process that reduces casting rejects and the casting quality is guaranteed.

Claims (11)

Sand core strength testing apparatus applicable to a core making apparatus comprising a core box, characterized in that a testing device is further included; wherein one end of the testing device is located in the core box, and the end of the testing device is able to press against a sand core head in the core box, and the testing device is able to move relative to the core box while the end of the testing device is moving to compressing the sand core head within the core box so that a distance traveled by the tester is obtained. Device for testing the strength of sand cores claim 1 , characterized in that the test device comprises an extruder mechanism, a pendulum mechanism, and a test mechanism; the pendulum mechanism and the extruder mechanism are both located inside the core box, the extruder mechanism communicates with one end of the pendulum mechanism, while the end of the extruder mechanism opposite the pendulum mechanism is configured to compress the sand core head inside the core box, and the test mechanism is arranged on the pendulum mechanism and is configured to determine a distance traveled by the pendulum mechanics. Device for testing the strength of sand cores claim 2 , characterized in that the core box is provided with a test channel, and the pendulum mechanism is arranged in the test channel and is in sealed communication with the test channel. Device for testing the strength of sand cores claim 3 , characterized in that the pendulum mechanism comprises a force assembly, a push rod, and a sealing ring; the sealing ring is located in the test port and the sealing ring is in sealed communication with the test port, the power assembly and push rod are located in the seal ring, and the power assembly is drivingly connected to the push rod, and the end of the push rod located in the core box is connected to the Extruder mechanics is connected. Device for testing the strength of sand cores claim 4 , characterized in that the end of the test channel remote from the extruder mechanics is provided with a sealing plate, the push rod is configured to pass through the sealing plate, and the push rod is movable to and fro relative to the sealing plate. Device for testing the strength of sand cores claim 5 , characterized in that the force assembly comprises a cylinder and an elastic element; the cylinder communicates with the end of the push rod remote from the extruder mechanism, the elastic element is sheathed around the outside of the push rod and both ends of the elastic element abut the extruder mechanism and the sealing plate, respectively, and the cylinder for displacing the elastic element is configured in a compressed state such that the resilient member has a resilient tendency to move the push rod toward the extruder mechanics. Device for testing the strength of sand cores claim 6 , characterized in that the cylinder is provided with a sealing chamber, and one end of the push rod is arranged in the sealing chamber. Device for testing the strength of sand cores claim 7 characterized in that a stop is provided in the sealing chamber and is configured to abut the push rod; and the stop is configured such that the extruder mechanics abut the sand core head within the core box. Device for testing the strength of sand cores according to one of claims 2 - 8th , characterized in that the testing mechanism is a distance sensor. Device for testing the strength of sand cores according to one of claims 2 - 9 , characterized in that the extruder mechanism comprises an extruder head and a connecting section; the extruder head is connected to the pendulum mechanism by means of the connecting section, and the extruder head rests against the sand core head inside the core box. Device for testing the strength of sand cores claim 10 characterized in that the extruder head is cone-shaped and is configured such that the tip of the extruder head abuts the sand core head within the core box.

Images