CN112248392B - Test assembly, test method and manufacturing method of injection molding machine - Google Patents
Test assembly, test method and manufacturing method of injection molding machine Download PDFInfo
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- CN112248392B CN112248392B CN202011123730.2A CN202011123730A CN112248392B CN 112248392 B CN112248392 B CN 112248392B CN 202011123730 A CN202011123730 A CN 202011123730A CN 112248392 B CN112248392 B CN 112248392B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
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Abstract
The invention relates to a test assembly, a test method and a manufacturing method of an injection molding machine. The testing assembly comprises a first connecting piece and a second connecting piece, wherein the first connecting piece is used for connecting the testing assembly to a fixed template of the injection molding machine; a second connecting member for connecting the side assembly to an injection unit of the injection molding machine, the second connecting member including a first moving bar which is connectable to the injection unit and moved by being pushed by the injection unit; the first connecting piece is positioned at one axial end of the testing assembly, and the second connecting piece is positioned at the other axial end of the testing assembly; and the buffer assembly is positioned between the first connecting piece and the second connecting piece and comprises an elastic piece, a hydraulic oil cylinder, a first plate and a second plate.
Description
Technical Field
The invention relates to the field of injection molding, in particular to a test assembly and a test method for an injection unit of an injection molding machine and a manufacturing method of the injection molding machine.
Background
With the development of society, the application of polymer materials is more and more extensive, so the demand for injection molding machines is also more and more big, especially the demand for injection molding machines customized individually. Therefore, manufacturers of injection molding machines are constantly developing new models of injection molding machines to meet market demands.
The injection unit is one of the main components of the injection molding machine. However, in the manufacturing method of the injection molding machine in the prior art, generally, after the injection unit of the injection molding machine of a new model is designed, after all parts of the whole injection molding machine are assembled, the performance of the injection unit is tested by the pressure and temperature sensors of the injection molding machine, and if the injection unit cannot meet the design requirements after the test, the injection molding machine which is processed and assembled in the final assembly needs to be disassembled to disassemble the injection unit. Even if the injection unit meets the design requirement through testing, if a single injection molding machine is required to be provided with injection units of different specifications, the injection unit after the test is disassembled and disassembled after the injection molding is finished, the injection units of different specifications are replaced, final assembly is carried out, and then the test of a new injection unit is carried out, so that the manufacturing cost is greatly improved, the test process of the injection unit is also very complicated, and the test research and development progress of the injection molding machine is slowed down.
Disclosure of Invention
It is an object of the present invention to provide a test assembly which allows a fast and accurate evaluation of the performance of an injection unit.
It is an object of the present invention to provide a test method that allows for a fast and accurate evaluation of the performance of an injection unit.
An object of the present invention is to provide a method for manufacturing an injection molding machine, which can efficiently and inexpensively manufacture a single injection molding machine having a plurality of injection units of different specifications, and which is stable and reliable in performance of the injection units of the respective specifications.
A test assembly according to one aspect of the present invention for testing an injection unit of an injection molding machine, includes: the first connecting piece is used for connecting the testing assembly to a fixed template of the injection molding machine; a second connecting member for connecting the side assembly to an injection unit of the injection molding machine, the second connecting member including a first moving bar which is connectable to the injection unit and moved by being pushed by the injection unit; the first connecting piece is positioned at one axial end of the testing assembly, and the second connecting piece is positioned at the other axial end of the testing assembly; the buffer assembly is positioned between the first connecting piece and the second connecting piece and comprises an elastic piece, a hydraulic oil cylinder, a first plate and a second plate, one end of the elastic piece is fixedly connected to the first plate, the other end of the elastic piece is fixedly connected to the second plate, and one end of the second plate can move in a first direction under the pressure of the first moving rod to drive one end of the elastic piece fixedly connected with the second plate to move; the first plate is fixedly connected with a piston rod of the hydraulic oil cylinder, the piston rod of the hydraulic oil cylinder can apply pressure in a second direction on the first plate, and the second direction is opposite to the first direction.
In one or more embodiments of the test assembly, there is an intermediate piece between the second plate and the piston rod of the hydraulic ram, the piston rod, intermediate piece and the first travel bar being coaxially arranged.
In one or more embodiments of the test assembly, the piston rod has a first section and a second section, a boundary between the first section and the second section is a step structure, the first plate abuts against the step structure through a pressing piece, a connecting hole is formed in an end face of the second section, a protruding portion is arranged at one end of the middle piece and can be connected with the connecting hole, and the other end of the middle piece is elastically connected with the second plate.
In one or more embodiments of the test assembly, the resilient member comprises a plurality of spring assemblies distributed circumferentially around the intermediate member, the spring assemblies comprising springs and spring guides.
In one or more embodiments of the test assembly, the first connector comprises a first retaining plate and the second connector comprises a second retaining plate; the test assembly further comprises a plurality of guide rods, the guide rods are evenly distributed in the circumferential direction, two ends of each guide rod are fixedly connected with the first fixing plate and the second fixing plate respectively, the guide rods penetrate through the first guide holes of the first plate and the second guide holes of the second plate, and the guide rods are connected with the first guide holes and the second guide holes through self-lubricating bearings.
In one or more embodiments of the test assembly, the second connector further comprises a second positioning sleeve, the first moving rod is sleeved in the second positioning sleeve, so that the first moving rod is positioned in the circumferential direction and the radial direction, the second positioning sleeve is fixedly connected to the second fixing plate, and the first moving rod can pass through the hole of the second fixing plate to the second plate.
In one or more embodiments of the test assembly, the first connector further includes a first positioning sleeve, and the first positioning sleeve is fixedly connected to the first fixing plate.
A testing method according to an aspect of the present invention for testing an injection unit of an injection molding machine includes:
s1, applying injection force of an injection unit to a rod piece to enable the rod piece to move;
s2, the rod piece moves to abut against the second plate, the injection force is applied to one end of the second plate, an elastic piece is arranged between the second plate and the first plate, two ends of the elastic piece are respectively connected with the first plate and the second plate, and the elastic force which is compressed by the elastic piece and accumulated is applied to the other end of the second plate; the first plate is subjected to the oil pressure of the hydraulic oil cylinder, the first plate and the second plate are respectively pushed to a stroke position from an initial position, and the limit position of the stroke position of the first plate is the minimum length of a piston rod of the hydraulic oil cylinder extending out of a shell of the hydraulic oil cylinder;
s3, keeping the pressure maintaining time period of S2;
and S4, after the pressure maintaining time period is over, the injection force is released, and the piston rod of the hydraulic oil cylinder extends and the elastic force accumulated by the elastic member is released to push the first plate and the second plate to return to the initial positions.
In one or more embodiments of the test method, the distance from the initial position to the extreme position of the stroke position is at least 60% of the injection stroke of the injection unit.
A method of manufacturing an injection molding machine according to an aspect of the present invention includes:
A. manufacturing a bed body, a first injection unit and a fixed template of an injection molding machine, and installing the first injection unit and the fixed template on the bed body;
B. testing the first injection unit using a test assembly as defined in any one of the above, or using a test method as defined in any one of the above;
C. manufacturing a second injection unit, detaching the first injection unit from the bed, and mounting the second injection unit on the bed;
D. testing the second injection unit using a testing assembly according to any one of the above, or using a testing method according to any one of the above.
The progressive effects of the scheme include but are not limited to:
through the combination of the spring and the hydraulic oil cylinder, the injection unit can be tested with enough injection stroke, injection pressure and dwell time, so that the real performance of the injection unit in the injection molding machine can be accurately and reliably tested. Furthermore, the performance of the injection unit is tested by adopting the testing component, compared with the scheme in the prior art, the performance of the injection unit is not required to be tested after the injection molding machine is assembled, the single injection molding machine can be manufactured with the injection units of multiple specifications efficiently and at low cost, and the performance of the injection unit of each specification is stable and reliable.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments in conjunction with the accompanying drawings, it being noted that the drawings are given by way of example only and are not drawn to scale, and should not be taken as limiting the scope of the invention which is actually claimed, wherein:
FIG. 1 is a schematic diagram of an external view of a test assembly according to an embodiment.
Fig. 2 is a cross-sectional structural view of the test assembly according to fig. 1.
Fig. 3 is a sectional view taken along line C-C in fig. 2.
FIG. 4 is a schematic structural diagram of a test assembly disposed on an injection molding machine according to an embodiment.
FIG. 5 is an embodiment
Fig. 6 is a block flow diagram of a method of manufacturing an injection molding machine according to an embodiment.
Detailed Description
The following discloses many different embodiments or examples for implementing the subject technology described. Specific examples of components and arrangements are described below to simplify the present disclosure, but these are merely examples and do not limit the scope of the invention.
In addition, it is to be understood that references to "one embodiment", "an embodiment", and/or "some embodiments", "one or more embodiments" mean that a particular feature, structure, or characteristic described in connection with at least one embodiment of the application is intended. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "some embodiments" or "one or more embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Referring to fig. 1-4, in some embodiments, the test assembly 10 includes a first connector 1, a second connector 2, and a buffer assembly 3. As shown in fig. 4, a first connector 1 is used for connecting the test assembly 10 to the fixed die plate 100 of the injection molding machine, a second connector 2 is used for connecting the test assembly 10 to the injection unit 200 of the injection molding machine, the first connector 1 is located at one axial end of the test assembly 10, the second connector 2 is located at the other axial end of the test assembly 10, the fixed die plate 100 and the injection unit 200 are mounted on the bed 300 of the injection molding machine.
With continued reference to fig. 1-3, the second connector 2 includes a first movable rod 21, and the first movable rod 21 can be connected to the injection unit 200 at one end and can be moved by being pushed by the injection pressure of the injection unit 200. The buffer assembly 3 is located between the first connecting member 1 and the second connecting member 2, and includes an elastic member 31, a hydraulic cylinder 32, a first plate 33, and a second plate 34. One end of the elastic member 31 is fixedly connected to the first plate 33, the other end is fixedly connected to the second plate 34, and the second plate 34 can move in the first direction under the pressure of the first moving rod 21 at one end thereof, so as to drive one end of the elastic member 31 fixedly connected to the second plate 34 to move. As shown in fig. 2, after receiving the injection force of the injection unit 200, the first moving rod 21 moves from right to left in the axial direction, the first moving rod 21 moves to the second plate 33, and the second plate 33 compresses the elastic member 31 to store the elastic force. And the first plate 33 is fixedly connected with the piston rod 322 of the hydraulic cylinder 32, which may be specifically as shown in fig. 2, the piston rod 322 has a first section 3221 and a second section 3222, an interface between the first section 3221 and the second section 3222 is a stepped structure, the first plate 33 presses the first plate 33 against the stepped structure of the piston rod 322 by a pressing member, for example, a lock nut 35, and the first plate 33 has an opening at the center thereof, so that the piston rod 322 of the hydraulic cylinder 32 penetrates through the first plate 33, so that the piston rod 322 can apply a pressure on the first plate 33, wherein the direction of the pressure is a second direction opposite to the first direction. When the test is finished, the injection pressure releases the force on the first moving rod 21, and the piston rod 322 may push the first plate 33 to move in the second direction with the pressure applied to the first plate 33.
The test assembly introduced above has the beneficial effects that the elastic part 31 and the hydraulic oil cylinder 32 together provide buffer acting force corresponding to the injection pressure, so that the test assembly can bear the injection pressure, the injection stroke and the pressure holding time which are close to those of the injection unit in the actual use of the injection molding machine (especially a high-speed injection molding machine), and the real performance of the injection unit in the injection molding machine can be tested more accurately and reliably. Furthermore, the performance of the injection unit is tested by adopting the testing component, compared with the scheme in the prior art, the performance of the injection unit is not required to be tested after the injection molding machine is assembled, the single injection molding machine can be efficiently manufactured with the injection units of multiple specifications at low cost, and the injection unit manufactured after the injection unit is tested has stable and reliable performance.
As described above with reference to fig. 4 and 5, in the process of assembling the injection molding machine, the method for testing the performance of the injection unit 200 after the injection molding machine is assembled on the bed 300 and the fixed mold plate 100 and the injection unit 200 are installed includes:
s1, applying the injection force of the injection unit 200 to the first moving rod 21 to move the first moving rod 21;
s2, the first moving rod 21 moves to abut against the second plate 34, so that one end of the second plate 34 applies injection force, an elastic piece 31 is arranged between the first plate 33 and the second plate 34, two ends of the elastic piece 31 are respectively connected with the first plate 33 and the second plate 34, the other end of the second plate 34 is applied with elastic force accumulated by compression of the elastic piece 31, the first plate 33 is subjected to oil pressure of the hydraulic oil cylinder 32, and the second plate 34 is respectively pushed to a stroke position from an initial position; it will be appreciated that the extreme positions of the stroke positions of the first plate 33 are the minimum length of the piston rod 322 of the hydraulic cylinder 32 extending out of the housing 321, and may be, for example, fully retracted into the housing 321, when the minimum length of the piston rod 322 extending out of the housing 321 is 0. For testing the injection pressure and the injection stroke of the injection unit 200 in an actual situation, specifically, the inventor finds that the tested injection stroke must be more than 60% of the actual injection stroke to reflect the actual performance more accurately, and the arrangement of the elastic member in combination with the hydraulic oil cylinder enables the distance between the initial position and the stroke limit position of the first plate 33 and the second plate 34 to be the maximum stroke of the piston rod 321, so that the maximum stroke is at least 60% of the injection stroke of the injection unit 200, thereby achieving that the actual use condition of the injection unit 200 is closer, and the test result is more accurate and reliable. The above-mentioned limit of travel position, such as that shown in fig. 2, may be the shortest position in which the piston rod 322 of the hydraulic cylinder 32 is retracted to its extended position, or may even be the position in which it is retracted into the housing 321 without being extended, where the limit of travel position is close to the first plate 33, it being understood that "close" here is to be considered because the elastic member 31 should have a certain height even if it is fully compressed.
S3, continuing the step S2 for a pressure maintaining time period T1; also, the actual use condition of the shooting unit 200 is closer to the actual use condition, so that the test result is more accurate and reliable, and the inventor has found in the process of completing the invention that the buffer assembly is required to provide a larger and stable buffer force when the pressure holding time period T1 is realized, such as the combination of the elastic member 31 and the hydraulic oil cylinder 32 described in the above embodiment.
And S4, after the pressure maintaining time period T1 is over, releasing the injection force, extending the piston rod 322 of the hydraulic oil cylinder 32, releasing the elastic force accumulated by the elastic piece 31, and pushing the first plate 33 and the second plate 34 to return to the initial positions.
In this way, the performance test of the injection unit 200 is carried out after the injection molding machine is assembled on the bed 300 and the fixed die plate 100 and the injection unit 200 are installed, and the real performance of the injection unit in the injection molding machine is accurately and reliably tested.
With reference to fig. 4 and 6, a method of manufacturing an injection molding machine for injection unit testing using the above-described test assembly may include the steps of:
A. manufacturing a bed 300, a first injection unit 200 and a fixed die plate 100 of an injection molding machine, and mounting the first injection unit 200 and the fixed die plate 100 on the bed 300;
B. testing the performance of the first injection unit 200 using the test assembly 10 or the test method described above;
C. manufacturing a second injection unit, detaching the first injection unit 200 from the bed, and attaching the second injection unit to the bed 300;
D. testing the performance of the second injection unit using the test assembly 10 or the test method described above; it will be appreciated that if the injection pressures of the second injection unit and the first injection unit 200 differ significantly, the pressure of the hydraulic cylinder 32 may be adjusted to adjust the damping force of the damping assembly.
Through the above description, those skilled in the art will understand that the test assembly 10 of the above embodiment can implement rapid, reliable, and low-cost performance testing of multiple specifications of injection units during the manufacturing process of an injection molding machine, so as to implement efficient and low-cost manufacturing of a single injection molding machine capable of corresponding to multiple specifications of injection units.
With continued reference to fig. 1 and 2, in some embodiments, an intermediate member 36 is disposed between the second plate 34 and the piston rod 322 of the hydraulic cylinder 32, and the piston rod 322, the intermediate member 36 and the first movable rod 21 are coaxially disposed, so that the impact originally borne by the piston rod 322 can be transferred to the intermediate member 36, so that the test assembly can be easily located, and the maintenance cost can be reduced, because the inventor finds in the process of completing the present invention that the piston rod 322 is directly damaged by the impact due to the large injection force of the injection molding machine, especially the high-speed injection molding machine, and the piston rod 322 is difficult to be replaced separately after being damaged, and the hydraulic cylinder 32 needs to be replaced integrally, so that the maintenance cost is high. And the intermediate piece 36 can be replaced independently after being damaged, so that the maintenance cost is reduced.
As shown in fig. 1 and fig. 2, in one or more embodiments, the specific structure of the intermediate member 36 and the piston rod 322 may be that the end surface of the second section 3222 of the piston rod 322 has a connecting hole 3220, one end of the intermediate member 36 has a protrusion 361 capable of being matched and connected with the connecting hole 3220, and the other end of the intermediate member 36 is elastically connected with the second plate 34, so that the connection between the piston rod 322 and the intermediate member 36 may be more stable and reliable, the impact of the intermediate member 36 on the piston rod 322 may be reduced, the life of the piston rod 322 may be longer, and the hydraulic force of the piston rod 322 may be reliably applied to the second plate 34 through the intermediate member 36.
Referring to fig. 2 and 3, in some embodiments, the elastic member 31 includes a plurality of spring assemblies 310, the plurality of spring assemblies 310 are distributed circumferentially around the intermediate member 36, and the spring assemblies 310 include a spring 311 and a spring guide 312. The arrangement has the advantages that the maintenance of the test assembly 10 can be facilitated, and the inventor finds that the service life of the elastic piece 31 of the test assembly 10 is the shortest in the process of completing the invention, and then the intermediate piece 36 is arranged, so that the intermediate piece 36 which is as short as the service life can be replaced together after the elastic piece 31 which is positioned at the periphery in the circumferential direction is disassembled after the elastic piece 31 is damaged, thereby reducing the maintenance and disassembly time of the test assembly and improving the service efficiency of the test assembly.
Referring to fig. 1 to 3, in some embodiments, the first connecting element 1 includes a first fixing plate 11, the second connecting element 2 includes a second fixing plate 22, and the testing assembly 10 further includes a plurality of guide rods 4, wherein the guide rods 4 are uniformly distributed in the circumferential direction, for example, four guide rods 4 are distributed at a circumferential angle of 90 ° as shown in fig. 1 to 3. Two ends of each guide rod 4 are fixedly connected with the first fixing plate 11 and the second fixing plate 22 respectively, the guide rod 4 passes through the first guide hole 330 of the first plate 33 and the second guide hole 340 of the second plate 34, and the guide rod 4 is connected with the first guide hole 330 and the second guide hole 340 through the self-lubricating bearing 38. The beneficial effect who so sets up lies in, adopts many guide arms 4 to connect first fixed plate 11, second fixed plate 22 for keep good stability when buffering subassembly 33 receives great injection force, guide arm 4 and first board 33, second board 34 adopt self-lubricating bearing to be connected, can reduce frictional resistance, in order to be closer actual conditions, and the test result is more accurate reliable more.
With continued reference to fig. 1 to 3, in an embodiment, the specific structure of the first connecting member 1 and the second connecting member 2 may be that the second connecting member 2 further includes a second positioning sleeve 23, the first moving rod 21 is sleeved in the second positioning sleeve 23, so that the first moving rod 21 is positioned in the circumferential direction and the radial direction, the second positioning sleeve 23 is fixedly connected to the second fixing plate 22, and the first moving rod 21 can pass through the hole of the second fixing plate 22 to the second plate 34, so that a possible shifting direction shift of the first moving rod 21 caused by a large injection force can be avoided, so that the first moving rod 21 receives the injection force more completely, and a force in the injection direction is prevented from being shifted to cause a loss due to force components in other directions, so that the force applied to the test assembly is closer to the actual use condition of the injection assembly. Further, the first connecting member 1 may further include a first positioning sleeve 12, and the first positioning sleeve 12 is fixedly connected to the first fixing plate 11, so that the first connecting member 1 is more stably connected to the fixed die plate 100.
In summary, the beneficial effects of the test assembly, the test method and the injection molding machine manufacturing method using the injection unit described in the above embodiments include, but are not limited to: through the combination of the spring and the hydraulic oil cylinder, the injection unit can be tested with enough injection stroke, injection pressure and dwell time, so that the real performance of the injection unit in the injection molding machine can be tested more accurately and reliably. Furthermore, the performance of the injection unit is tested by adopting the testing component, compared with the scheme in the prior art, the performance of the injection unit is not required to be tested after the injection molding machine is assembled, the single injection molding machine can be manufactured with the injection units of multiple specifications efficiently and at low cost, and the performance of the injection unit of each specification is stable and reliable.
Although the present invention has been disclosed in the above-mentioned embodiments, it is not limited thereto, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. A test assembly for testing an injection unit of an injection molding machine, comprising:
the first connecting piece is used for connecting the testing assembly to a fixed template of the injection molding machine;
the second connecting piece is used for connecting the testing assembly to an injection unit of the injection molding machine and comprises a first moving rod, and the first moving rod can be connected with the injection unit and is pushed by the injection unit to move; the first connecting piece is positioned at one axial end of the testing assembly, and the second connecting piece is positioned at the other axial end of the testing assembly; and
the buffer assembly is positioned between the first connecting piece and the second connecting piece and comprises an elastic piece, a hydraulic oil cylinder, a first plate and a second plate, one end of the elastic piece is fixedly connected to the first plate, the other end of the elastic piece is fixedly connected to the second plate, and one end of the second plate can move in a first direction under the pressure of the first moving rod to drive one end of the elastic piece fixedly connected with the second plate to move; the first plate is fixedly connected with a piston rod of the hydraulic oil cylinder, a shell of the hydraulic oil cylinder is positioned between the first plate and the first connecting piece, the piston rod of the hydraulic oil cylinder can apply pressure in a second direction on the first plate, and the second direction is opposite to the first direction.
2. The test assembly of claim 1 wherein the second plate has an intermediate piece between a piston rod of the hydraulic ram, the piston rod, intermediate piece and first travel bar being coaxially disposed.
3. The test assembly according to claim 2, wherein the piston rod has a first section and a second section, the interface between the first section and the second section is a step structure, the first plate abuts against the step structure through a pressing member, the end surface of the second section has a connecting hole, one end of the intermediate member has a protruding portion capable of being connected with the connecting hole, and the other end of the intermediate member is elastically connected with the second plate.
4. The test assembly of claim 3, wherein the resilient member comprises a plurality of spring assemblies distributed circumferentially about the intermediate member, the spring assemblies comprising springs and spring guides.
5. The test assembly of claim 1, wherein the first connector comprises a first retaining plate and the second connector comprises a second retaining plate; the testing assembly further comprises a plurality of guide rods, the guide rods are evenly distributed in the circumferential direction, two ends of each guide rod are fixedly connected with the first fixing plate and the second fixing plate respectively, the guide rods penetrate through the first guide holes of the first plate and the second guide holes of the second plate, and the guide rods are connected with the first guide holes and the second guide holes through self-lubricating bearings.
6. The test assembly of claim 5, wherein the second connector further comprises a second locating sleeve, the first movable rod being received within the second locating sleeve such that the first movable rod is located circumferentially and radially, the second locating sleeve being fixedly attached to the second fixed plate, the first movable rod being movable through the aperture of the second fixed plate to the second plate.
7. The test assembly of claim 5, wherein the first connector further comprises a first retaining sleeve, the first retaining sleeve fixedly coupled to the first retaining plate.
8. A testing method for testing an injection unit of an injection molding machine using a test assembly according to any one of claims 1 to 7, comprising:
s1, applying injection force of an injection unit to a rod piece to enable the rod piece to move;
s2, the rod piece moves to abut against the second plate, the injection force is applied to one end of the second plate, an elastic piece is arranged between the second plate and the first plate, two ends of the elastic piece are respectively connected with the first plate and the second plate, and the elastic force which is compressed by the elastic piece and accumulated is applied to the other end of the second plate; the first plate is subjected to the oil pressure of the hydraulic oil cylinder, the first plate and the second plate are respectively pushed to a stroke position from an initial position, and the limit position of the stroke position of the first plate is the minimum length of a piston rod of the hydraulic oil cylinder extending out of a shell of the hydraulic oil cylinder; the distance from the initial position to the extreme position of the stroke position is at least 60% of the injection stroke of the injection unit;
s3, continuously maintaining the S2 for a pressure maintaining time period;
and S4, after the pressure maintaining time period is over, the injection force is released, and the piston rod of the hydraulic oil cylinder extends and the elastic force accumulated by the elastic member is released to push the first plate and the second plate to return to the initial positions.
9. A method of manufacturing an injection molding machine, comprising:
A. manufacturing a bed body, a first injection unit and a fixed template of an injection molding machine, and installing the first injection unit and the fixed template on the bed body;
B. testing the first injection unit using a test assembly according to any one of claims 1-7, or using a test method according to claim 8;
C. manufacturing a second injection unit, detaching the first injection unit from the bed, and mounting the second injection unit on the bed;
D. testing the second injection unit using a test assembly according to any one of claims 1-7, or using a test method according to claim 8.
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| CN105842066A (en) * | 2015-01-15 | 2016-08-10 | 仙芮企业有限公司 | Force measurement test machine with travel increased |
| CN104634663B (en) * | 2015-03-06 | 2017-11-24 | 扬州大学 | The adjustable long-term pressurized tests device of self-balancing pin |
| CN204820253U (en) * | 2015-07-20 | 2015-12-02 | 宁波市海达塑料机械有限公司 | Fully electric injection machine injects pressure measuring equipment |
| US20190301961A1 (en) * | 2018-04-02 | 2019-10-03 | Actuant Corporation | Load frame with a staged biasing element |
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