Fluidity tester

Abstract

The utility model relates to the technical field of PCB (Printed Circuit Board) production equipment, and discloses a fluidity tester. The fluidity tester comprises a machine table, wherein a pressing die shield and a control cabinet are arranged on the machine table; a die pressing mechanism is arranged in the die pressing protective cover and comprises a driving air cylinder, a lower heating assembly and an upper heating assembly, the output end of the driving air cylinder is connected to the lower heating assembly, the upper heating assembly is erected above the lower heating assembly, and the driving air cylinder drives the lower heating assembly to move up and down relative to the upper heating assembly; the circumferential side faces of the upper heating assembly and the lower heating assembly are each provided with a heat insulation baffle. Under the structure, the fluidity tester can effectively prevent the external environment temperature from influencing the test result of the PP material.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB production equipment, and particularly relates to a fluidity tester. Background Art

[0002] As an insulating dielectric layer material in a PCB board, PP is a polymer material composed of glass fabric, resin, hardener dicyandiamide, accelerator, solvent and additive. The lamination principle is required in the PCB production process. The most important purpose of lamination is to make PP combine different inner core boards and outer copper foils through "heat and pressure", and use the outer copper foil as the base of the outer circuit.

[0003] During the lamination process, the fluidity of the PP material needs to be accurately controlled to ensure uniform filling between each layer during the production of the PCB board; if the fluidity is insufficient, it may lead to voids or incomplete filling, and these defects will reduce the mechanical strength and electrical insulation performance of the circuit board; on the contrary, if the fluidity is excessive, it may cause interlayer short circuits or other electrical faults; therefore, it is very crucial to control the fluidity of the PP material during the PCB production process.

[0004] Generally, the heating module on the traditional fluidity tester is exposed to the external environment. Therefore, when testing the fluidity of the PP material, the temperature of its heating module and the PP material is greatly affected by the external environment, resulting in a large error in the test result of the fluidity of the PP material.

[0005] Therefore, there is an urgent need for a fluidity tester to solve the above problems. Summary of the Utility Model

[0006] Based on the above, the purpose of the utility model is to provide a fluidity tester to solve the problem of large error in the test result caused by the influence of the external environment on the temperature when testing the fluidity of the PP material.

[0007] To solve the above technical problems, the utility model adopts the following technical solutions:

[0008] A fluidity tester provided by the utility model includes: a machine table, on which a pressing die shield and a control cabinet are provided;

[0009] The die pressing mechanism is installed inside the die pressing shield and includes a driving cylinder, a lower heating component, and an upper heating component. The output end of the driving cylinder is connected to the lower heating component. The upper heating component is mounted above the lower heating component. The driving cylinder drives the lower heating component to move up and down relative to the upper heating component.

[0010] Wherein, heat insulation baffles are respectively arranged on the circumferential sides of the upper heating component and the lower heating component.

[0011] As an alternative technical solution of a fluidity tester, the die pressing mechanism further includes a mounting plate fixedly arranged on the end face of the machine table. The driving cylinder is placed inside the machine table, and its output end penetrates through the mounting plate and extends above the mounting plate.

[0012] As an alternative technical solution of a fluidity tester, guide shafts are vertically arranged at the four corner positions of the mounting plate. The top ends of the guide shafts are fixedly provided with a die pressing top plate. The upper heating component is connected to the bottom surface of the die pressing top plate.

[0013] As an alternative technical solution of a fluidity tester, the die pressing mechanism further includes a die pressing bottom plate. The lower heating component is arranged on the upper end face of the die pressing bottom plate. A bushing is arranged between the die pressing bottom plate and the guide shaft. The die pressing bottom plate is slidably sleeved on the guide shaft through the bushing.

[0014] As an alternative technical solution of a fluidity tester, the die pressing mechanism further includes a connecting seat. One end of the connecting seat is fixedly connected to the output end of the driving cylinder, and the other end is fixedly connected to the bottom surface of the die pressing bottom plate.

[0015] As an alternative technical solution of a fluidity tester, a die pressing heat insulation plate is arranged between the upper heating component and the die pressing top plate; a die pressing heat insulation plate is arranged between the lower heating component and the die pressing bottom plate.

[0016] As an alternative technical solution of a fluidity tester, heat insulation sheet metals are respectively installed on the outer side surfaces of each heat insulation baffle.

[0017] As an alternative technical solution of a fluidity tester, the upper heating component includes a heating plate, heating tubes, and a temperature control probe. There are multiple heating tubes. The multiple heating tubes are arranged in the heating plate at equal intervals. The temperature control probe is installed among the multiple heating tubes. The structures of the upper heating component and the lower heating component are the same.

[0018] The beneficial effects of the present utility model are:

[0019] The utility model provides a fluidity tester, which includes a machine table, on which a die pressing shield and a control cabinet are arranged; a die pressing mechanism is arranged inside the die pressing shield, and the die pressing mechanism includes a driving air cylinder, a lower heating assembly and an upper heating assembly. The output end of the driving air cylinder is connected to the lower heating assembly, and the upper heating assembly is erected above the lower heating assembly. The driving air cylinder drives the lower heating assembly to move up and down relative to the upper heating assembly; heat insulation baffles are respectively arranged on the circumferential sides of the upper heating assembly and the lower heating assembly. When the fluidity tester is in use, the PP material to be tested is placed on the lower heating assembly, and the driving air cylinder is started to drive the lower heating assembly to move upward and abut against the upper heating assembly. At this time, the heat insulation baffles installed on the circumferential sides of the upper heating assembly and the lower heating assembly also approach each other and form a relatively sealed heat preservation cavity; therefore, when the upper and lower heating assemblies heat the PP material, the heat insulation baffles can effectively isolate the external environment and avoid the influence of the external environment temperature on the test result of the PP material. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of the fluidity tester in the embodiment of the utility model;

[0021] Figure 2 It is a partially exploded schematic diagram of the fluidity tester in the embodiment of the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of the die pressing mechanism in the embodiment of the utility model;

[0023] Figure 4 It is an exploded view of the die pressing mechanism in the embodiment of the utility model.

[0024] In the figure:

[0025] 1, machine table; 2, die pressing shield; 3, control cabinet; 4, die pressing mechanism; 40, heat insulation baffle; 401, heat insulation sheet metal; 41, driving air cylinder; 42, lower heating assembly; 421, heating plate; 422, heating pipe; 423, temperature control probe; 43, upper heating assembly; 44, mounting plate; 45, guide shaft; 451, shaft sleeve; 46, die pressing top plate; 47, die pressing bottom plate; 48, connecting seat; 49, die pressing heat insulation plate. Detailed Embodiment

[0026] The following further describes the utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, rather than limiting the utility model. In addition, it should be noted that for the convenience of description, only parts related to the utility model are shown in the drawings, rather than all the structures.

[0027] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0029] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0030] In the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0031] As Figures 1-4 shown, the present utility model provides a fluidity tester, which includes a machine table 1, on which a die pressing shield 2 and a control cabinet 3 are provided; a die pressing mechanism 4 is installed in the die pressing shield 2 and includes a driving cylinder 41, a lower heating assembly 42, and an upper heating assembly 43. The output end of the driving cylinder 41 is connected to the lower heating assembly 42, and the upper heating assembly 43 is mounted above the lower heating assembly 42. The driving cylinder 41 drives the lower heating assembly 42 to move up and down relative to the upper heating assembly 43; wherein, heat insulation baffles 40 are respectively provided on the circumferential sides of the upper heating assembly 43 and the lower heating assembly 42.

[0032] A fluidity tester provided by the utility model forms a relatively sealed heat preservation cavity through a heat insulation baffle 40 installed on the circumferential side surfaces of the upper heating assembly 43 and the lower heating assembly 42; when the upper and lower heating assemblies 42 heat the PP material, the heat insulation baffle 40 can effectively isolate the external environment and avoid the influence of the external environment temperature on the test result of the PP material; meanwhile, installing a die pressing guard 2 outside the die pressing mechanism 4 can prevent dust and impurities in the external environment from contaminating the PP material during the test.

[0033] Specifically, as Figures 1-2 shown, a die pressing guard 2 and a control cabinet 3 are respectively arranged on the left and right above the machine table 1. The die pressing mechanism 4 is installed on the machine table 1 and is located inside the die pressing guard 2. A control module is arranged inside the control cabinet 3. A control panel is arranged on the outer side surface of the control cabinet 3. The die pressing mechanism 4 is electrically connected to the control module, and each function of the die pressing mechanism 4 is controlled and adjusted through the control buttons on the control panel; a cabinet door with pores is also opened on the outer side surface of the die pressing guard 2, and the PP sample is taken and placed by opening the cabinet door. Thus, the setting of the die pressing guard 2 not only facilitates the taking and placing of the PP sample, but also can isolate the dust and impurity pollution brought by the external environment during the test.

[0034] In this embodiment, as Figure 3 and Figure 4 shown, the die pressing mechanism 4 includes a mounting plate 44 fixedly installed on the upper end surface of the machine table 1. The output end of the driving cylinder 41 penetrates through the mounting plate 44 and extends above the mounting plate 44, and the driving cylinder 41 body is placed inside the machine table 1. This setting optimizes the structure of the entire fluidity tester and makes the structure of this fluidity tester more compact and practical.

[0035] Specifically, the upper heating assembly 43 includes a heating plate 421, heating tubes 422 and a temperature control probe 423. There are multiple heating tubes 422, and the multiple heating tubes 422 are arranged at equal intervals inside the heating plate 421. The temperature control probe 423 is installed between the multiple heating tubes 422. The structures of the upper heating assembly 43 and the lower heating assembly 42 are the same. Among them, the heating tubes 422 are preferably four, and the temperature control probe 423 is arranged in the middle of every two heating tubes 422, so that the temperature detection accuracy is higher and the temperature control effect is better.

[0036] Further, guide shafts 45 are vertically upwardly provided at the four corners of the mounting plate 44. At the top ends of the four guide shafts 45, a die pressing top plate 46 is fixedly provided. A die pressing heat insulation plate 49 is provided on the bottom surface of the die pressing top plate 46. The upper heating assembly 43 is connected to the bottom surface of the die pressing heat insulation plate 49. The die pressing mechanism 4 further includes a die pressing bottom plate 47. A die pressing heat insulation plate 49 is provided on the upper end surface of the die pressing bottom plate 47. The lower heating assembly 42 is provided on the upper end surface of the die pressing heat insulation plate. With the above structure, the setting of the die pressing heat insulation plate 49 can isolate the heat generated by the heating assembly from being conducted to the die pressing top plate 46 and the die pressing bottom plate 47. On the one hand, it can make the heating temperature of the heating assembly more stable. On the other hand, it avoids the die pressing top plate 46 and the die pressing bottom plate 47 absorbing the heat and generating high temperature to affect the service life of the equipment. A bushing 451 is provided between the die pressing bottom plate 47 and the guide shaft 45. The die pressing bottom plate 47 is slidably sleeved on the guide shaft 45 through the bushing 451. That is to say, during the working process of this fluidity tester, the lower heating assembly 42 is driven by the driving cylinder 41 to move relative to the upper heating assembly 43 to apply pressure.

[0037] Further, a connecting seat 48 is further provided between the output end of the driving cylinder 41 and the die pressing bottom plate 47. One end of the connecting seat 48 is fixedly connected to the output end of the driving cylinder 41, and the other end is fixedly connected to the bottom surface of the die pressing bottom plate 47. The setting of the connecting seat 48 increases the force receiving area of the output shaft of the driving cylinder 41 on the die pressing bottom plate 47, so that the lower heating assembly 42 can move upward more stably.

[0038] In this embodiment, in order to further improve the temperature stability of the fluidity tester, heat insulation sheet metals 401 are respectively installed on the outer side surfaces of each heat insulation baffle 40.

[0039] When the fluidity tester of the present utility model is in use, first, parameters such as the temperature and time required for the test are adjusted through the control panel. Then, the measured PP sample is placed between two release films, weighed, and its mass is recorded. It is clamped by two steel plates, and then the heating start button is pressed and the heating tube 422 starts to heat. Observe the temperature measurement value displayed on the control panel. When the temperature reaches the set value, the prepared PP sample and the steel plates are placed in the middle part of the lower heating block. Press the start button, and the lower heating assembly 42 is driven by the driving cylinder 41 to rise and abut against the upper heating assembly 43 to press the steel plates, so that the PP sample melts and flows and then solidifies under high temperature and high pressure. Finally, the PP sample is taken out and cut into corresponding size specifications using a mold, etc., and weighed. The fluidity is calculated based on the masses of the PP samples before and after weighing.

[0040] As described above, it is only a preferred embodiment of the present utility model and does not impose any formal restrictions on the present utility model. Although the present utility model is disclosed above in a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art, without departing from the scope of the technical solution of the present utility model, when making some changes or modifications using the above-disclosed technical content to equivalent embodiments of equivalent changes, but as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the present utility model all fall within the scope of the technical solution of the present utility model.

Claims

1. A fluidity tester, characterized in that, Including: A machine platform, on which a die pressing shield and a control cabinet are provided; A die pressing mechanism, installed inside the die pressing shield, including a driving cylinder, a lower heating component and an upper heating component. The output end of the driving cylinder is connected to the lower heating component, the upper heating component is erected above the lower heating component, and the driving cylinder drives the lower heating component to move up and down relative to the upper heating component; Wherein, heat insulation baffles are respectively arranged on the circumferential sides of the upper heating component and the lower heating component.

2. The fluidity tester according to claim 1, wherein, The die pressing mechanism further includes a mounting plate fixed on the end face of the machine platform. The driving cylinder is placed inside the machine platform, and its output end penetrates through the mounting plate and extends above the mounting plate.

3. The fluidity tester according to claim 2, wherein Guide shafts are vertically arranged at the four corner positions of the mounting plate, a die pressing top plate is fixed at the top end of the guide shaft, and the upper heating component is connected to the bottom surface of the die pressing top plate.

4. The fluidity tester according to claim 3, wherein The die pressing mechanism further includes a die pressing bottom plate, and the lower heating component is arranged on the upper end face of the die pressing bottom plate; a bushing is arranged between the die pressing bottom plate and the guide shaft, and the die pressing bottom plate is slidably sleeved on the guide shaft through the bushing.

5. The fluidity tester according to claim 4, wherein The die pressing mechanism further includes a connecting seat, one end of the connecting seat is fixedly connected to the output end of the driving cylinder, and the other end is fixedly connected to the bottom surface of the die pressing bottom plate.

6. A fluidity tester according to claim 4, characterized in that, A die pressing heat insulation plate is arranged between the upper heating component and the die pressing top plate; a die pressing heat insulation plate is arranged between the lower heating component and the die pressing bottom plate.

7. The fluidity tester according to claim 1, wherein Heat insulation sheet metals are respectively installed on the outer side surfaces of each heat insulation baffle.

8. A fluidity tester according to any one of claims 1-7, characterized in that, The upper heating component includes a heating plate, heating tubes and temperature control probes. There are multiple heating tubes, and the multiple heating tubes are arranged in the heating plate at equal intervals. The temperature control probes are installed among the multiple heating tubes. The structures of the upper heating component and the lower heating component are the same.

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