CN201154544Y

CN201154544Y - Vacuum forming mold

Info

Publication number: CN201154544Y
Application number: CNU2007201762332U
Authority: CN
Inventors: 张立光
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-04
Filing date: 2007-09-04
Publication date: 2008-11-26
Anticipated expiration: 2017-09-04

Abstract

The utility model provides a multi-layer plastic suction mould mainly made from organic material, aiming at solving the defects existing in the polyester glass fiber reinforced plastic dies with single material. The plastic suction mould is formed by compounding three layers of structures while the outermost layer thereof is a surface layer, the middle layer is a transition layer and the bottom layer is a mould body. The surface layer and the mould body are combined by the transition layer arranged in the middle part. Air holes which are communicated up and down are arranged all over the mould. The multi-layer plastic suction mould of the utility model has low costs, short production period of moulds and the service life of the plastic suction mould is far longer than that of the existing polyester glass fiber reinforced plastic die. As the suction mould of the utility model has low coefficient of expansion and contraction; furthermore, when in high temperature, the surface layer has no cracks and blistering, good stability, and the dimension is not easily to deformed, thus the products of the utility model has good quality, smooth shape and no discrepancy in dimension.

Description

Plastics suction mould

Technical field

The utility model belongs to the plastics suction mould that uses on a kind of plastics sucking moulding device.

Prior art

The plastic uptake method is one of conventional process of plastic shaping.Utilize the product of plastic uptake method manufacturing to spread all over whole sphere of life, as acrylic bathtub, integral bathroom, lampshade, automotive trim etc.Its method is that the plastic plate with acrylic board or various materials is heated to about 200 ℃ and is put in die surface, and after the air extractor below mould was bled, mould pasted volt in the die surface moulding.

The plastics suction mould that present plastics suction mould device is used always is the organic toughened glass manufacturing by single material, and this material can only used below 90 ℃ for a long time.And in the plastic uptake method of plastic shaping, acrylic board or plastic plate will be heated to the temperature about 200 ℃.When nearly 200 ℃ thermoplastic plate is attached to the plastics suction mould surface, die surface is formed thermal shock, surface resin easily produces cracking under high heat effect.Phenomenons such as bubble influence product quality.And the poor heat stability of glass-reinforced plastic material easily produces bulk deformation or dimensional discrepancy in the use, the producer will constantly be repaired or mold exchange more, has strengthened production cost and has prolonged production time of product.

The another shortcoming of fiber reinforced plastic mold is that the Mold Making cycle is long.This is the moulding because fiber reinforced plastic mold can not be produced once.If once paste blocked uply, can cause that resin exposes to the sun poly-and contraction distortion.So when making mould, it is thick to paste 2-3mm at every turn.After treating its curing, it shrinks naturally to place one or two angel naturally, reduces internal stress, continues to paste again.The thick fiber reinforced plastic mold of 8-15mm generally need be made 7-10 days.And integral body also needs after finishing nature to place 3-5 days, treats that it shrinks the minimizing die deformation naturally and could use.A big Mold Making cycle of common bathtub needs about 15 days.

And because fiber reinforced plastic mold is to do base material by unsaturated polyester (UP), its production process and use all have the styrene volatilization, and environment is caused to a certain degree pollution.

Summary of the invention

The purpose of this utility model is the defective for the organic toughened glass mould of eliminating existing single material, and provide a kind of multilayer, based on the plastics suction mould of inorganic material.

The technical solution of the utility model is: plastics suction mould is to be composited by three-decker, and its most external is a superficial layer, and the centre is a transition zone, and the bottom is a die body.Superficial layer and die body are bonded as one by the middle transitional layer.On mould, be furnished with the pore of up/down perforation.

Superficial layer is the solidifying body of light face resin and water-setting powder mixture; Transition zone is to make reinforcing material, make the solidifying body of base material with resin glue and water-setting powder with thin glass fiber grid cloth; The bottom die body is that raw glass fibrous mesh cloth and water-setting powder replace bonding solidifying body.

The utility model is composited by several materials with different properties, and it has concentrated the advantage of each material, the material difference that three-decker is used, and their roles also have nothing in common with each other, and each aspect is born respective load.Superficial layer is the aspect of pasting volt mutually with the raw material plastic plate that will make product, its smooth surface, hardness height, heat-resistant antifriction.The middle transitional layer has viscosity when making, it is superficial layer and die body close adhesion, and the thermal shock that superficial layer is born, external impacts etc. are lenitively to the die body transmission, offset or minimizing external force to the destruction of mould.Because the utility model is based on inorganic material, hear resistance is far above the organic toughened glass of present use, and superficial layer can not chap, bubble when height is warm because of thermal shock.Because the main material water-setting powder of mould has minimum dilatancy, and coefficient of thermal expansion and contraction is little, and mould does not produce contraction, and heat endurance is strong, size is not yielding, thereby the good product quality of making, smooth-shaped, the deviation on the no size again.The utility model cost of manufacture is cheap, and the mould manufacturing time is short, and the mould of a common bathtub size only needed complete and can use in 4 hours.Also be longer than existing organic toughened glass mould service life of the present utility model far away.

Description of drawings

Fig. 1 is the broken section enlarged drawing of the utility model plastics suction mould.

Fig. 2 is the cross-sectional schematic of plastics sucking moulding device.

Among the figure; 1, superficial layer, 2, transition zone, 3, die body, 4, pore, 5, seal box, 6, the exhausting hole.

The specific embodiment

With reference to Fig. 1, the utility model plastics suction mould is to be composited by three-decker, and its most external is a superficial layer 1, and superficial layer 1 is the solidifying body of light face resin and water-setting powder mixture; The centre is a transition zone 2, and transition zone 2 is to make reinforcing material, make the solidifying body of base material with resin glue and water-setting powder with thin glass fiber grid cloth; The bottom is a die body 3, and die body 3 is that raw glass fibrous mesh cloth and water-setting powder replace bonding solidifying body.Because middle transitional layer 2 has viscosity when making, superficial layer 1 is bonded as one with die body 3 by middle transitional layer 2.The thickness of superficial layer 1 is 0.2-1mm, and the thickness of transition zone 2 is 0.2-1mm, and the thickness of die body 3 is 8-15mm.On plastics suction mould, spread all over the pore 4 that up/down perforation is arranged.Pore 4 is that the aperture is the circular hole of 1-2mm.

Each composition that uses in the material all is that common industrial chemicals is formed.The water-setting powder be a kind of be that main component adds lime stone, gypsum is levigate by dehydrated sulfur aluminic acid dicalcium and dicalcium silicate, add the fiber gelatinized material of the hydraulicity that string, chemical fibre blend form.Light face resin is to be formed by methyl acrylate, unsaturated carboxylic acid, nonionic surface active agent and initator and water copolymerization, has higher vitrification point.Resin glue is to be formed by butyl acrylate or the eleventh of the twelve Earthly Branches ester, unsaturated carboxylic acid, nonionic surface active agent and initator and water copolymerization, and vitrification point is corresponding low.Thin glass fiber grid cloth finger-hole directly is the 1-3mm fiberglass gridding cloth.Raw glass fibrous mesh cloth finger-hole directly is the 4-8mm fiberglass gridding cloth.

The manufacture process of mould is: earlier light face resin and water-setting powder mixture are mixed to pasty state, are coated on the master mold of being made by die model or gypsum, final thickness 0.2-1mm makes superficial layer 1; At this moment check whether initial set of smear layer, be as the criterion that the pasty mixture with resin glue and water-setting powder is applied on the superficial layer 1 again not touch with one's hand, and will cut out suitable thin glass fiber grid cloth and spread repeatedly and smear, remove bubble, final thickness is controlled at 0.2-1mm, forms transition zone 2; After treating transition zone 2 initial sets, water is coated in water-setting powder furnishing pasty state on the transition zone 2, and the raw glass fibrous mesh cloth is spread, and one deck cloth is coated with one deck pastel until desired thickness, forms die body 3, and die matrix just is made into.Treat the mould drying, bore pore 4 at last again on mould, whole plastics suction mould promptly completes.

If desired, plastics suction mould also can only be made by the material of superficial layer 1, and just the thickness of mould is thicker than the die surface layer thickness of three-decker, makes it have certain rigid and just can reach requirement.

Shown in Figure 2 is a plastics sucking moulding schematic representation of apparatus.Plastics suction mould closely is fastened on the seal box that seal box 5 upper ends form a closure.Seal box 5 has an exhausting hole 6.During work, be put in die surface being heated to the acrylic board about 200 ℃ or the plastic plate of various materials, air exhauster is started working.Air in the seal box 5 is outwards extracted out by exhausting hole 6, made in the seal box 5 and form negative pressure.Because the effect of negative pressure in the case, seal box 5 air outside are drawn in the seal box 5 by the pore 4 that spreads all on the mould, make like this between mould and the outside plastic plate and also produced a negative pressure, plastic plate just is fitted in moulding on the superficial layer 1 of mould tightly, and treating to take off after cold promptly becomes required product.

The utility model also can be used for the mould manufacturing of other purposes.

Claims

1, a kind of plastics suction mould is characterized in that: it is to be composited by three-decker, and its most external is superficial layer (1), and the centre is transition zone (2), and the bottom is die body (3); Superficial layer (1) is bonded as one with die body (3) by middle transitional layer (2); On mould, be furnished with the pore (4) of up/down perforation.

2, plastics suction mould according to claim 1 is characterized in that: the thickness of superficial layer (1) is 0.2-1mm, and the thickness of transition zone (2) is 0.2-1mm, and the thickness of die body (3) is 8-15mm.

3, plastics suction mould according to claim 1 is characterized in that: pore (4) is that the aperture is the circular hole of 1-2mm.