CN2111179U - Plastic parison heating device - Google Patents

Abstract

The utility model relates to a bottle parison heating device which is suitable for producing plastic bottles step-by-step with injection, drawing and blowing. The utility model comprises a support frame 12, a heat-insulating casing 15, electric heating elements 2, 11 arranged in the casing, and a set of vertically arranged cylindrical heating mould cavities 10, temperature control interfaces 13, 14 are respectively arranged on the upper and lower heat conducting plates 5, 7 of the heating mould cavities 10, and a heat-insulating layer is arranged between the heat conducting plates. The temperatures of the upper and lower heat conducting plates are balanced and adjusted by changing the input characteristic of a heating power supply; plastic bottle parisons are directly arranged on insulating panels 4 at the upper ends of the heating mould cavities 10. Therefore, the utility model has the advantages of simple operation, and convenient temperature adjustment of the upper and lower parts of the heating mould cavities.

Description

Plastic parison heating device

The utility model relates to the bottle base heater that plastic bottle is produced in a kind of plastic parison heater, especially injection moulding and blowing step by step, belongs to the improvement of existing blowing auxiliary machine.

Chinese patent (application number: 89203000.3, the day for announcing 900620) discloses a kind of " plastic bottle blank liquid heating "; Its principal character is to be full of liquid heating medium between heated mould in the casing of heat-insulation and heat-preservation, be installed in the heating wire and heating tube heating of bottom in the casing after, by liquid medium conduction heated mould.Therefore one of problem that exists is, only in the bottom of casing the individual layer heating tube being set carries out unidirectional heating to liquid medium, be difficult to the heating-up temperature of plastic parison upper and lower side demand is regulated, and liquid medium (as machine oil or paraffin) boiling point is lower, heating is difficult to reach the blow molding process requirement to some plastics (as PP.PC.HDPE) bottle base, and using has certain limitation.Two of the problem that exists is, because this heater is provided with liquid overflow pipe, when the gas of liquid medium or this liquid medium when liquid overflow pipe is discharged, will pollute production environment and heating back or plastic bottle blank to be heated, then there is hygienic issues in the plastic bottle that is used for medicine packing and food, beverage, condiment package.Chinese patent (application number 88221296.6. open day 891025) also discloses a kind of " producing the equipment of plastic containers ", baking oven wherein is by last drying-plate, following drying-plate, be mould drying between the upper and lower drying-plate, last drying-plate has the baking oven mouth, the baking chamber is arranged in the middle of the baking oven, baking is put parison in the chamber, and parison cooperates with the lip mould, fluted in the upper and lower drying-plate, the interior discharge of groove heated filament.The subject matter that this baking oven exists is; because baking oven is not provided with heat-insulation layer; heat scatters and disappears big; fail fully to effectively utilize heat energy; this heat scattered and disappeared then even more serious when temperature was low especially in the winter time; even also can make operation element condition variation in addition in summer; above-mentioned two kinds of bottle base heaters also exist a common problem; promptly only need the plastic bottle blank of heating all opening protective device must be installed to each; (as lip mould in mouth mould in the documents one and the documents two); just can heat; each bottle base all needs respectively to have one manual clamping and stripping process like this; influence the raising of production efficiency, also increased the cost of heater simultaneously.

The purpose of this utility model is to overcome existing above-mentioned deficiency in the prior art, and a kind of heating die cavity upper and lower part temperature can be regulated, balance and provide, and heat scatters and disappears few, and is simple in structure, cost is low, is suitable for the heater of multiple plastic bottle blank.

The purpose of this utility model is realized by following technical proposal.

Heater of the present utility model, comprise scaffold, casing, electrical heating elements in the casing, an and vertically disposed end opening, the tubular heating die cavity of one end sealing, and on the heating die cavity, lay a thermal insulation layer between the bottom guide, be provided for supporting the heat insulation shelf of bottle base in the upper port of heating die cavity, at the equal heat-insulation plate with inner lining in each side of casing, heating is arranged in the groove of the upside of heat-conducting plate and following heat-conducting plate downside, on, following heat-conducting plate is respectively arranged with the temperature control interface, on being undertaken by the input characteristics that changes temperature control interface thermoelectric generator, the temperature balance or the adjusting of following heat-conducting plate.

The utility model can also be in addition perfect by following technical proposal.In being installed, the groove of heating fills in magnesia insulation thermal conductor, with fixing heating and increased the service life of heating.

The utility model compared with prior art has following advantage: (1) owing to utilize heating to heat and carry out the adjusting or the balance of temperature simultaneously in the upper and lower both sides of die cavity, therefore the plastic parison after heating guarantees the quality of stretch blow bottle easily.(2) each side liner heat-barrier material of heater casing, heat scatters and disappears few, can energy savings.(3) gas of no liquid medium or overflow, influence and pollute the sorrow of production environment can improve the operation sanitary condition.(4) bottle base need not the mould clamping and the demoulding, directly puts into the heating die cavity and is shelved on the thermal insulation board and can heats, and has simplified operating procedure, and the operating efficiency of bottle base heating is increased.

Description of drawings is as follows:

Fig. 1 is the structural representation of the utility model heater.

Fig. 2 is the vertical view of Fig. 1.

The utility model will be described in further detail in conjunction with the accompanying drawings.

Heater as illustrated in fig. 1 and 2, comprise scaffold 12 casings 15, heating 2 and 11 in the casing 15, give upper end open with respect to plane on the casing 15 vertically disposed, the tubular heating die cavity 10 of lower end closed, on heating die cavity 10, lay a thermal insulation layer 6 between the following heat-conducting plate (body) 5 and 7, heating 2 and 11 is arranged in the groove 3 of heat-conducting plate 5 upsides and heat-conducting plate 7 downsides, heater casing 15 top layers adopt sheet metal 9 to coat, the equal heat-insulation plate with inner lining in each side (layer) 8, scatter and disappear energy savings with the heat that reduces heat-conducting plate in the casing 15.Heat-conducting plate 5 and 7 is an aluminium matter heat carrier, thermal insulation board 6 is set between the two, and on upper and lower heat-conducting plate 5 and 7, be respectively arranged with temperature control interface 13 and 14, make heater structurally satisfy upper and lower heat-conducting plate 5 and 7 and can adjusted in concert (balance) also can regulate (the generation temperature difference) respectively, to adapt to the needs of different operating modes, adjusting is according to temperature control interface 13 and 14 shown temperature, or directly temperature-sensitive is tested the gained parameter, realizes by the input characteristics that changes temperature control interface 13 and 14 thermoelectric generators.In order to simplify the operating procedure of plastic bottle blank 1 in heating process, heater of the present utility model is not established lip mould or mouthful mould, but directly plastic bottle blank 1 is bearing on the heat insulation shelf 4, and this shelf 4 is stacked with the thermal insulation board 8 of its downside; The perhaps thermal insulation board 8 of casing 15 upsides or 4 thickenings are to solve the heat exchange problem of 10 pairs of plastic bottle blank 1 bottlenecks of heating die cavity; Diameter in set hole should be less than the maximum gauge of need heating bottle blank on it., to be heated during operation to the temperature required taking-up successively again of blowing as long as plastic bottle blank 1 is inserted heating die cavity 10 successively to be bearing on the isolated shelf 4.

Fixing in groove 3 for ease of heating, and the service life of prolongation heating.When heating 2 and 11 is heating wire, can in groove 3, fill in magnesia (MgO) insulation thermal conductor (16); Be enclosed within copper pipe or steel pipe inner structure if the heating wire of heating is a sky, then in copper pipe or steel pipe, fill magnesia insulation thermal conductor 16, and then this electrothermal tube is fixed in the groove 3 of heat-conducting plate 5 and 7.

Claims (2)

1, a kind ofly be applicable to that injection moulding and stretch blow produce the bottle base heater of plastic bottle step by step, comprise scaffold, casing, heating in the casing, and one group of vertically disposed upper end open, the tubular heating die cavity of lower end closed, it is characterized in that: on heating die cavity (10), following heat-conducting plate (5), (7) lay a thermal insulation layer (6) between, be provided for supporting the heat insulation shelf (4) of bottle base in the upper port of heating die cavity (10), at the equal heat-insulation plate with inner lining in each side of casing (15) (8), heating (2) and (11) are arranged in the groove (3) of heat-conducting plate (5) upside and following heat-conducting plate (7) downside, on, be respectively arranged with temperature control interface (13) (14) on the following heat-conducting plate (5) (7), and by changing the input characteristics of thermoelectric generator, on carrying out, the temperature balance or the adjusting of following heat-conducting plate (5) (7).

2, bottle base heater as claimed in claim 1 is characterized in that: install and to be filled with in the groove (3) of heating (2) and (11) in order to the fixing magnesia of the heating thermal conductor (16) that insulate.

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