Viscosity testing device for PTC (Positive Temperature Coefficient) heating film printing paste

Abstract

The viscosity testing device for the PTC heating film printing paste comprises a viscosity tester, a low-temperature thermostatic bath, a first connecting pipe and a second connecting pipe, the viscosity tester is arranged beside the low-temperature thermostatic bath and comprises a support, a machine body arranged on the support, a rotor arranged on the machine body and a container arranged on the support and opposite to the rotor, the container is of a hollow structure, and a first inlet and a first outlet are formed in the container; the low-temperature thermostatic bath comprises a cooling liquid box body, a water pump and a temperature adjusting mechanism, the cooling liquid box body is provided with a second inlet and a second outlet which are communicated with an inner cavity of the cooling liquid box body, the cooling liquid box body is communicated with the container through a first connecting pipe and a second connecting pipe, and the water pump is used for driving cooling liquid to circularly flow. Compared with the prior art, the viscosity testing device disclosed by the utility model has the advantages that the temperature of the container is adjusted by utilizing the cooling liquid box body and the temperature adjusting structure of the existing low-temperature thermostatic bath, so that compared with the scheme of purchasing a viscosity tester with a temperature adjusting function, the cost is lower.

Description

TECHNICAL FIELD

[0001] The utility model belongs to viscosity testing device, concretely relates to a viscosity testing device of PTC heating film printing paste. BACKGROUND

[0002] In the PTC heating film screen printing process, the viscosity of printing paste plays a key role in the printing thickness, and once the viscosity is unstable or deviates from the appropriate range, the paste thickness on the heating film will be uneven, which will seriously affect the performance and quality of the product, such as heating rate, temperature uniformity and product reliability. Therefore, after obtaining the paste from the paste supplier, the viscosity of the paste will be tested first.

[0003] In order to accurately measure the viscosity of the paste and improve the production quality of the PTC heating film, the temperature of the paste will be controlled within the optimal temperature range (the temperature range is generally the temperature under the working condition of the PTC heating film) during the measurement of the viscosity of the paste. Therefore, the existing viscosity testing device generally has a temperature adjusting mechanism. However, some PTC heating film manufacturers do not have a temperature adjusting mechanism in their viscosity testing device. If they want to improve the accuracy of the viscosity measurement of the paste, they need to purchase another device with a temperature adjusting mechanism, which increases the production cost.

[0004] After the PTC heating film is screen printed, it needs to be placed in a low-temperature constant-temperature tank for product testing. Specifically, the temperature in the tank is adjusted to the working temperature of the PTC heating film, and then the performance of the product is tested. SUMMARY

[0005] The utility model aims at overcoming the defects in the prior art and providing a viscosity testing device for PTC heating film printing paste.

[0006] To achieve the above purpose, the utility model discloses a viscosity testing device for PTC heating film printing paste, which comprises a viscosity tester, a low-temperature constant-temperature tank, a first connecting pipe and a second connecting pipe.

[0007] The viscosity tester is arranged beside the low-temperature constant-temperature tank, and comprises a support, a machine body arranged on the support, a rotor arranged on the machine body, and a container arranged on the support and opposite to the rotor. The container is a hollow structure, and the container is provided with a first inlet and a first outlet which are in communication with the inner cavity of the container.

[0008] The low-temperature constant-temperature tank comprises a cooling liquid tank body, a water pump and a temperature adjusting mechanism for adjusting the temperature of the cooling liquid. The cooling liquid tank body is provided with a second inlet and a second outlet which are in communication with the inner cavity of the cooling liquid tank body. The two ends of the first connecting pipe are connected with the second outlet and the first inlet, and the two ends of the second connecting pipe are connected with the first outlet and the second inlet.

[0009] The cooling liquid tank, the first connecting pipe, the inner cavity of the container and the second connecting pipe form a circulating flow channel, and the water pump is arranged in the circulating flow channel and used to drive the cooling liquid to circulate in the circulating flow channel.

[0010] Preferably, the container is detachably connected to the support.

[0011] Preferably, the first inlet is arranged below the first outlet.

[0012] Preferably, the first connecting pipe is a heat insulation pipe.

[0013] Preferably, the first connecting pipe is provided with a heat insulation sleeve.

[0014] Preferably, the first connecting pipe and the second connecting pipe are detachably connected to the cooling liquid tank and the container.

[0015] Preferably, the low-temperature thermostat is provided with a display.

[0016] Preferably, the water pump is arranged between the viscosity tester and the low-temperature thermostat.

[0017] Compared with the prior art, the viscosity testing device for PTC heating film printing paste has the following beneficial effects:

[0018] The viscosity testing device for PTC heating film printing paste, the container of the viscosity tester is communicated with the cooling liquid tank of the low-temperature thermostat through the first connecting pipe and the second connecting pipe, and when the viscosity is tested, the water pump drives the cooling liquid at a certain temperature to circulate in the circulating flow channel, and the container can be maintained in a certain temperature range under the action of the cooling liquid, so that the paste to be tested in the container is maintained in a certain temperature range, and the test effect is ensured.

[0019] By utilizing the cooling liquid tank and the temperature adjusting structure of the existing low-temperature thermostat, the container is hollow, and the water pump, the first connecting pipe and the second connecting pipe are further arranged to communicate the cooling liquid tank and the container, so that the temperature of the container is adjusted, and the viscosity tester has the function of adjusting the temperature of the paste in the container, which is lower in cost compared with the scheme of purchasing a viscosity tester with a temperature adjusting function. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of the three-dimensional structure of the viscosity testing device for PTC heating film printing paste of the embodiment;

[0021] Viscosity tester 100; support 110; machine body 120; rotor 130; container 140;

[0022] Low-temperature thermostat 200; tank body 210; display 220;

[0023] The first connecting pipe 300 and the second connecting pipe 400. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, characteristics and advantages of the utility model more apparent, comprehensible, combined with the drawings and specific embodiments, the utility model will be further explained in detail.

[0025] A viscosity testing device for PTC heating film printing paste, referring to Figure 1 , comprising a viscosity testing instrument 100, a low-temperature constant-temperature tank 200, a first connecting pipe 300 and a second connecting pipe 400. The viscosity testing instrument 100 is arranged beside the low-temperature constant-temperature tank 200, the viscosity testing instrument 100 comprises a support 110, a machine body 120 arranged on the support 110, a rotor 130 arranged on the machine body 120 and a container 140 arranged on the support 110 and opposite to the rotor 130. The structure of the above-mentioned viscosity testing instrument 100 is the existing structure, which will not be described here. The container 140 is a hollow structure, and the container 140 is provided with a first inlet and a first outlet which are communicated with the inner cavity of the container 140. The low-temperature constant-temperature tank 200 comprises a cooling liquid tank (not shown in the figure), a water pump (not shown in the figure) and a temperature adjusting mechanism. The cooling liquid tank is used for storing cooling liquid, and the temperature adjusting mechanism is used for adjusting the temperature of the cooling liquid, for example, can comprise the existing refrigeration and heating system. The cooling liquid tank is provided with a second inlet and a second outlet which are communicated with the inner cavity of the cooling liquid tank. The two ends of the first connecting pipe 300 are connected with the second outlet and the first inlet, and the two ends of the second connecting pipe 400 are connected with the first outlet and the second inlet. The inner cavities of the cooling liquid tank, the first connecting pipe 300, the container 140 and the second connecting pipe 400 form a circulating flow channel, and the water pump is arranged in the circulating flow channel to drive the cooling liquid to circulate in the circulating flow channel.

[0026] The viscosity testing device of the embodiment, the container 140 of the viscosity testing instrument 100 is communicated with the cooling liquid tank of the low-temperature constant-temperature tank 200 through the first connecting pipe 300 and the second connecting pipe 400. When testing the viscosity, the water pump drives the cooling liquid at a certain temperature to circulate in the circulating flow channel, and the container 140 can be maintained within a certain temperature range under the action of the cooling liquid, so that the paste to be tested in the container 140 is maintained within a certain temperature range, and the test effect is guaranteed. By using the cooling liquid tank and the temperature adjusting mechanism of the existing low-temperature constant-temperature tank 200, the container 140 is arranged as a hollow structure, and the water pump, the first connecting pipe 300 and the second connecting pipe 400 are further arranged to communicate the cooling liquid tank and the container 140, so as to realize the temperature adjustment of the container 140, and the viscosity testing instrument 100 has the function of adjusting the temperature of the paste in the container 140. Compared with the scheme of purchasing the viscosity testing instrument 100 with the temperature adjusting function, the cost is lower.

[0027] Wherein, it can be understood that the low-temperature thermostat 200 is provided with a tank body 210 to realize its test function. The low-temperature thermostat 200 is provided with a flow channel capable of adjusting the temperature of the tank body 210, which is different from the above-mentioned circulating flow channel, and the two are independent of each other, so as to independently control the temperature of the tank body 210 and the container 140.

[0028] In the embodiment, the container 140 is detachably connected to the support 110, so that different volumes of the container 140 can be replaced according to needs, and containers 140 with different wall thicknesses can be provided to control the heat transfer effect, and the versatility is high.

[0029] In the embodiment, the first inlet of the container 140 is arranged below the first outlet, so that the cooling liquid flows into the container 140 from below and flows out from above. This arrangement makes the cooling liquid have a relatively larger contact area with the inner wall of the container 140, the heat transfer effect is better, the time for adjusting the temperature of the slurry can be shortened, and the efficiency is improved.

[0030] In the embodiment, in order to ensure the consistency of the temperature of the cooling liquid in the cooling liquid tank and the inner cavity of the container 140, the first connecting pipe 300 is specifically selected as a heat insulation pipe. In other embodiments, a heat insulation sleeve is sleeved on the first connecting pipe 300. Thus, when the cooling liquid flows through the first connecting pipe 300, the heat loss of the cooling liquid can be reduced, so that the temperature of the cooling liquid in the cooling liquid tank and the inner cavity of the container 140 is basically kept consistent, thereby improving the temperature control precision of the container 140 and the slurry in the container 140, and finally improving the production quality of the PTC heating film.

[0031] In the embodiment, the first connecting pipe 300 and the second connecting pipe 400 are detachably connected with the cooling liquid tank and the container 140, and the water pump is arranged at a position between the viscosity tester 100 and the low-temperature thermostat 200, which is convenient for maintenance.

[0032] In the embodiment, the low-temperature thermostat 200 is provided with a display 220, which can directly understand the temperature of the cooling liquid and indirectly reflect the temperature of the slurry in the container 140, so as to facilitate the operation of the operator.

[0033] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A viscosity testing device for PTC heating film printing paste, characterized in that: Includes a viscosity tester, a low-temperature thermostat, a first connecting pipe, and a second connecting pipe; The viscosity tester is located next to the low-temperature constant temperature bath. The viscosity tester includes a support, a body on the support, a rotor on the body, and a container on the support and opposite to the rotor. The container is a hollow structure and has a first inlet and a first outlet communicating with its inner cavity. The low-temperature constant temperature bath includes a coolant tank, a water pump, and a temperature regulating mechanism for adjusting the coolant temperature. The coolant tank is provided with a second inlet and a second outlet communicating with its inner cavity. The two ends of the first connecting pipe are connected to the second outlet and the first inlet, and the two ends of the second connecting pipe are connected to the first outlet and the second inlet. The coolant tank, the first connecting pipe, the inner cavity of the container, and the second connecting pipe form a circulation channel. The water pump is located in the circulation channel and is used to drive the coolant to circulate within the circulation channel.

2. The viscosity testing device for PTC heating film printing paste according to claim 1, characterized in that: The container is detachably connected to the support.

3. The viscosity testing device for PTC heating film printing paste according to claim 1, characterized in that: The first entrance is located below the first exit.

4. The viscosity testing device for PTC heating film printing paste according to claim 1, characterized in that: The first connecting pipe is a heat insulation pipe.

5. The viscosity testing device for PTC heating film printing paste according to claim 1, characterized in that: The first connecting pipe is fitted with a heat insulation sleeve.

6. The viscosity testing device for PTC heating film printing paste according to claim 1, characterized in that: The first and second connecting pipes are detachably connected to the coolant tank and container.

7. The viscosity testing device for PTC heating film printing paste according to claim 1, characterized in that: The low-temperature constant temperature bath is equipped with a display.

8. The viscosity testing device for PTC heating film printing paste according to claim 1, characterized in that: The water pump is located between the viscosity tester and the low-temperature constant temperature bath.

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