Multilayer isostactic pressing mold and isostactic pressing method thereof

Abstract

The invention discloses a multilayer isostactic pressing mold and an isostactic pressing method thereof. The multilayer isostactic pressing mold comprises two main molds and at least one interlayer mold, wherein the two main molds are two mutually-corresponding half shells, wherein each half shell is provided with a first hydraulic groove and a first half mold cavity, a first temperature control coil pipe is arranged inside the first hydraulic groove, a first template is arranged on the first half mold cavity; and the at least one interlayer mold is matched with the main molds in shape and can be correspondingly and separately arranged between the main molds, the interlayer mold is provided with a second hydraulic groove and two second half mold cavities, the second hydraulic cylinder is internally provided with a second temperature control coil pipe, in addition, a second template is arranged on each second half mold cavity, and the second half mold cavities correspond to the first half mold cavities and can be matched with the first half mold cavities to form a complete mold cavity. According to the invention, production efficiency can be effectively increased, and product quality is ensured.

Description

technical field [0001] The present invention relates to a multi-layer equal pressure forming mold and its equal pressure forming method, in particular to a light guide plate forming device and method that utilizes a temperature control liquid to uniformly pressurize. Background technique [0002] The known thermoforming method of light guide plate (LGP) mainly places the object to be imprinted in the cavity of an embossing mold. The imprinting mold includes a set of upper and lower templates, each of which has an embossing pattern On the printing surface, place the imprinted object between the upper and lower templates with embossed patterns and then close the imprinting mold. At this time, the upper and lower templates will form a closed mold cavity, and the imprinted object is stored in this closed mold cavity. The imprinting mold After closing, the embossing mold will be heated to soften the embossed object to a plastic state, and then the embossed mold will press on the ...

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Problems solved by technology

[0003] The pressurizing device in the prior art uses oil pressure, air pressure or other drivers as the source of output pressure, and cooperates with the crankshaft or shaft to directly connect the imprinting mold to apply pressure to the template. Compared with the shaft that transmits pressure, the template has a large area. plane, so the pressure transmitted by the axis to the template can be regarded as point pressure, so it is not easy to make the template fully compressed, so the pressure on the imprinted product that is pressed through the template is not uniform, so the imprinted product The yield rate is not easy to improve, and the size of the embossed finished product can only form small-sized products. Later, there will be a multi-axis pressing device and the use of a silicone plate as a buffer material, and the effect will only be slightly improved.

[0004] And the known heating device drills holes on the upper and lower templates or the embossing mold to set the waterway, and then heats or cools the imprinted object with hot liquid or cold liquid; or heat pipes and waterways are arranged crosswise, and the heat pipes are used for heating the embossing Object, and then pass cold liquid through water to cool the imprinted object. The above-mentioned known heating methods all need to heat the imprinting mold body first, and then transfer the heat energy to the imprinted object through heat conduction. This method of heat transfer is easy. Due to the size of the imprinting mold, the position of the heating pipe or the embedding of the waterway, and the size of the imprinted object, the transfer speed is not uniform, and the softening of the imprinted object is uneven, so the yield of the imprinted product is not good. It is easy to upgrade, so based on the above reasons, the inventor of the present invention thought and designed a multi-layer pressure equalizing mold and its equal pressure forming method, in order to improve the shortcomings of the existing technology, and then enhance the implementation and utilization of the industry

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