CN201151175Y - Compression molding die of seal strip of heat radiator for engine cooling system - Google Patents

Abstract

The utility model discloses a radiator sealing strip molding die for an engine cooling system, which comprises an upper die and a lower die, an upper die core is installed in the upper die, a lower die core is installed in the lower die, and the There is a mold cavity between them, and there are tearing edge grooves around the upper and lower mold cavities. The sealing strip of the engine cooling system vulcanized by the utility model mold through the vacuum vulcanization process, the product surface is not sticky, the flash is removed at one time, the shift output is large, the size and performance are stable, and it fully meets the standard requirements of high-performance EPDM sealing strips. The needs of the development of the automobile industry.

Description

Radiator sealing strip molding die for engine cooling system

technical field

The utility model relates to a mold, in particular to a radiator sealing strip mold for an engine cooling system.

Background technique

With the rapid development of the automobile industry, the sealing strip used in the cooling system of the automobile engine is required to withstand a temperature of up to 150°C. EPDM rubber can better meet this requirement by using a peroxide vulcanization system. However, the rubber with peroxide vulcanization system is easy to react with oxygen during the vulcanization process, causing the surface of the sealing strip to be sticky, and the vulcanization time is longer; at the same time, due to the large and long characteristics of the product itself, the number of cavities in the general design of the mold is relatively small. few. The vulcanization mold adopts injection molding vulcanization mold abroad, which has a small number of cavities, a small shift output, a large investment in equipment, and a high manufacturing cost for a single product.

Utility model content

The purpose of this utility model is to provide a radiator sealing strip molding mold for engine cooling system. The mold is designed as a molding tearing mold. The equipment adopts a vacuumized flat vulcanization molding machine. The vulcanization process adopts high temperature and rapid one-stage oxygen exhaust vulcanization The method of adding two-stage vulcanization and setting. The surface of the vulcanized product is not sticky, the number of mold cavities is large, the production efficiency is high, the cost is low, and the quality is stable.

The technical scheme of the utility model is as follows:

A radiator sealing strip molding mold for engine cooling system is characterized in that it includes an upper mold and a lower mold, an upper mold core is installed in the upper mold, a lower mold core is installed in the lower mold, and an upper mold is installed between the upper and lower molds. Cavities, the upper and lower mold cavities are surrounded by tearing grooves, and there are tearing grooves in each hole of the lower mold core.

The structure of the edge tearing groove adopts a hexagonal structure, and the side of the edge tearing groove close to the cavity is a straight surface with a height of 0.2-0.4mm.

The distance between the edge tearing groove and the cavity is 0.1-0.15 mm.

The invention is a kind of product manufacturing process that is suitable for the sealing strip of the peroxide vulcanization system using a tearing mold on a vacuum flat vulcanizer, and adopts a high-temperature rapid one-stage vulcanization molding and a constant temperature two-stage vulcanization setting method.

The distance between the tearing groove of the edge tearing mold of the utility model is generally 0.1-0.15mm from the cavity (the allowable flash of the product is generally 0.3-0.4mm), the mold structure adopts a compression molding structure, and the product flash is treated with tearing. The groove structure of the tearing edge adopts a hexagonal structure, and a 0.2-0.4mm straight surface is processed on the side close to the cavity to ensure that the tearing edge is cleaned at one time without leaving any flash.

The mold of the utility model needs to be produced on a vacuum vulcanization press with a hot plate of 550mm×600mm or above to ensure that the temperature remains stable during vulcanization. The vulcanization process adopts high-temperature rapid one-stage vulcanization molding, 190°C, 2.5 minutes; adding constant temperature two-stage vulcanization and setting, 170°C, 1 hour.

During production, install the mold on the vacuum vulcanization press, and set the pressure, vulcanization temperature, vulcanization time and vacuum exhaust time of the vacuum vulcanization press. key, the vulcanization press automatically performs mold clamping, feeding, pressurization, vacuuming, and vulcanization. After vulcanization is completed within the specified time, the mold is automatically ejected, and the product is taken out, and a stage of vulcanization is completed. After the product is out of the mold, the flash is removed, and the flash can be torn off at one time. Then the product is subjected to two-stage vulcanization to ensure that the product has stable performance, and the size and appearance meet the standard requirements.

Description of drawings

Fig. 1 is the utility model mold top view structural diagram.

Fig. 2 is A-A sectional view of the utility model.

Fig. 3 is a B-B sectional view of the utility model.

Detailed ways:

A radiator sealing strip molding die for an engine cooling system, comprising an upper mold 1 and a lower mold 2, an upper mold core 3 is installed in the upper mold 1, a lower mold core 4 is installed in the lower mold 2, the upper mold and the lower mold There is cavity 5 between 1 and 2, edge tearing groove 6 is arranged around described upper and lower mold cavity, hole tearing edge groove 7 is arranged in the lower mold core 4. The structure of the tearing groove 6 adopts a hexagonal structure, the side of the tearing groove 6 close to the cavity 5 is a straight face with a height of 0.2-0.4mm, and the distance between the tearing groove 6 and the cavity 5 is 0.1-0.15mm.

Claims (3)

1. an engine-cooling system is with radiator sealing strip compression molding mould, it is characterized in that including upper die and lower die, upper mold core is installed in the patrix, lower mold core is installed in the counterdie, between the upper and lower mould die cavity is arranged, around the described upper and lower model cavity torn edges groove is arranged, the counterdie core rod has the torn edges groove in each hole.

2. engine-cooling system according to claim 1 is characterized in that with radiator sealing strip compression molding mould described torn edges groove structure adopts hexgonal structure, and the torn edges groove is high the facing directly of 0.2-0.4mm near die cavity one side.

3. engine-cooling system according to claim 1 is characterized in that with radiator sealing strip compression molding mould described torn edges slot pitch die cavity distance is 0.1-0.15mm.

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