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Pekk powder hot pressing mold and molding method based on universal testing machine

A universal testing machine and hot press forming technology, which is applied in the field of powder hot press forming, can solve the problem of large temperature gradient between the sample and the mold surface

Active Publication Date: 2022-06-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the hot pressing equipment using resistance heating method adopts non-contact infrared temperature measurement, and the error can be as high as 40-50°C. At the same time, there is still a large temperature gradient between the sample and the surface of the mold.

Method used

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  • Pekk powder hot pressing mold and molding method based on universal testing machine
  • Pekk powder hot pressing mold and molding method based on universal testing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like Figure 1-2 As shown in the present invention, a PEKK powder hot pressing mold and molding method based on a universal testing machine, comprising an upper template 3, a lower template 14, a punch 6, a concave mold 13, a thermal insulation cotton 5, a support column 4, Fastening bolt 1, gasket 7, nut 8, set screw 15, heating rod 9, thermocouple 18, high-precision temperature PID controller 17, solid state relay 19, temperature control circuit 16 and PEKK powder 12 to be formed;

[0035] There are four testing machine connecting holes 2 distributed along the center in the middle of the upper die plate 3, which are used to connect the upper die 3 part with the upper chuck of the universal testing machine through the set screw 15. The diameter of the through hole is larger than the diameter of the screw 15. Diameter, to prevent gaps during connection, two stepped holes are opened on both sides of the upper template 3 to connect the support column 4 and the punch 6. A...

specific Embodiment approach

[0056] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Based on the PEKK powder hot pressing mold and the molding method of the universal testing machine,

[0057] In this embodiment, different materials can be replaced and sheets of different thicknesses can be formed, and the temperature and pressure can also be regulated, so as to realize powder hot pressing of sheets of different types and thicknesses under the conditions of different process parameters.

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Abstract

The invention discloses that the invention provides a PEKK powder hot-press molding mold and molding method based on a universal testing machine, including an upper template, a lower template, a convex mold, a concave mold, heat insulation cotton, support columns, fastening bolts, pads Chips, nuts, set screws, heating rods, thermocouples, high-precision temperature PID controllers, solid-state relays, temperature control circuits, and PEKK powder to be formed. The fastening bolts pass through the upper formwork, support columns, punches, mating gaskets and nuts to connect the upper mold part; due to the weight of the lower mold part, the fastening screws pass through the lower formwork, supporting columns, die and mating gaskets to connect the lower mold Insert the thermocouple and heating rod into the corresponding holes, and fix their positions with set screws; connect the temperature PID controller and solid state relay, and connect the heating rod and thermocouple into the circuit control system; finally connect the upper mold part into the upper chuck of the testing machine, and the lower mold part is connected to the lower chuck of the testing machine.

Description

technical field [0001] The invention relates to the technical field of powder hot pressing, in particular to a PEKK powder hot pressing mould and a forming method based on a universal testing machine. Background technique [0002] Powder hot pressing is the simplest and most common processing method. It mainly controls the melting of the hot pressing material by heating the hot pressing material in the cavity of the mold and applying pressure to the hot pressing material in the mold cavity. temperature and time so that the hot-pressed molding material is melted and then hardened and cooled, and then the cooled finished product can be taken out. To achieve powder hot pressing on the universal testing machine, a set of hot pressing molds must be matched with it. At present, most of the hot pressing equipment using resistance heating method adopts non-contact infrared temperature measurement, and the error can be as high as 40-50 °C. At the same time, there is still a large te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C43/02B29C43/36B29C43/52B29C43/58
CPCB29C43/02B29C43/36B29C43/52B29C43/58
Inventor 陈海东徐凡
Owner JIANGSU UNIV
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