CN203821171U - Novel sandwich structure synthetic sleeper - Google Patents

Abstract

The utility model discloses a novel sandwich structure synthetic sleeper, which is used for overcoming the defects of high density of the synthetic sleeper and small size of a die cavity. According to the technical scheme adopted for solving the technical problems, the novel sandwich structure synthetic sleeper is characterized in that the synthetic sleeper has a sandwich structure; the outer layer of the synthetic sleeper is a continuous fiber-reinforced polyurethane foam layer, and is 10-50 millimeters in thickness; a foam core material is arranged inside the synthetic sleeper, and the cross sectional shape of the foam core material is a square or rectangle of which the four corners are chamfered with rounded corners. The novel sandwich structure synthetic sleeper has the advantages of small density, high bearing intensity, simple and convenient procedure, high cost performance, and the like.

Description

A kind of novel sandwich structure synthesis wooden sleeper

Technical field

The utility model relates to technical field of composite materials, is specifically related to a kind of novel sandwich structure synthesis wooden sleeper structure and manufacture method thereof.

Background technology

Railway is one of China's main traffic transportation means, railroad sleeper adopts sleeper and reinforced concrete sleeper conventionally, as traditional sleeper, it has the processing of being easy to and transportation, insulating properties are high, damping property is excellent, but because its material is biomaterial, although through processing such as anticorrosion waterproof, its application life is still shorter, generally be no more than 15 years, its maintenance cost is also higher.Reinforced concrete sleeper, as the alternate material of sleeper, because weight is large, fragility is large, elasticity is low, easily occur the shortcomings such as crack, also is more and more difficult to meet the growth requirement of railway construction.For meeting the growth requirement of railway construction, developed country's development high molecular synthetic materials such as Japan, the U.S. replace original sleeper and reinforced concrete sleeper, wherein development is the most successfully the one-way glass fiber reinforcement polyurethane foam of Japanese ponding chemical industry Co., Ltd exploitation, i.e. synthesis wooden sleeper.This material has that good intensity is large, density is low, durability, flame retardancy, and higher mechanical property, lower density, corrosion-resistant and screw pull strength high.

Current domestic synthesis wooden sleeper patent is long fiber reinforcement homogeneous polyurethane foamed material, its manufacturing process generally include guide, foaming machine injecting glue, evenly soak pool, moulding, cutting, processing, bonding, process and the operation such as spray paint.The tall winter equality people of patent CN101314931A discloses a kind of long fiber reinforcement polyurethane foam homogeneous synthesis wooden sleeper formula and moulding process; Patent CN101328311A opens formula and the continuous forming process that the people such as use military forces discloses a kind of synthesis wooden sleeper, and this synthesis wooden sleeper is long fiber reinforcement homogeneous polyurethane foamed material; The people such as patent CN101550225A Sun Shou roc disclose the formula system of the self-skining flame retardation type polyurethane composite sleeper of a kind of available injection or pultrusion; CN101046077A stone island is bravely controlled and is disclosed a kind of have good durability, flame retardancy and shock resistance synthesis wooden sleeper and preparation method thereof.Above patent is long fiber reinforcement homogeneous polyurethane foamed material, partial monopoly is in synthesis wooden sleeper forming process, at surface skining, form flame-retardant layer, its main moulding process has all adopted continuous pultrusion molding process, but above synthesis wooden sleeper has all adopted homogeneous material, extrudate density is larger, conventionally density is greater than 750kg/m3, for ease of yarn bundle, arrange and infiltrate simultaneously, and prevent that inner thermal discharge from causing greatly burning core, the maximum cavity dimension of moulding is controlled conventionally as 210mm * 80mm, when making sleeper, need to carry out the bonding of piece and piece, virtually increased the cost of manufacture of synthesis wooden sleeper.

Summary of the invention

The utility model is the large and less deficiency of cavity dimension for above-mentioned synthesis wooden sleeper density, has proposed a kind of novel sandwich structure synthesis wooden sleeper.The purpose of this utility model is to introduce a kind of novel sandwich structure synthesis wooden sleeper structure.

For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions.

A kind of novel sandwich structure synthesis wooden sleeper, it is characterized in that: this synthesis wooden sleeper is sandwich structure, synthesis wooden sleeper skin is continuous fibre enhancement polyurethane froth bed, its thickness is 10mm～50mm, synthesis wooden sleeper inside is foam core material, and its shape of cross section is four jiaos of square or rectangulars that are rounded down.

Novel sandwich structure synthesis wooden sleeper according to described, is characterized in that: described synthesis wooden sleeper outer layer thickness is 20mm, and described foam core material shape of cross section is rectangle.

Novel sandwich structure synthesis wooden sleeper according to described, is characterized in that: between the skin of described synthesis wooden sleeper and foam core material, increase that to have transition intermediate layer, transition intermediate layer be layer of polyurethane or phenolic resins layer.

Owing to having adopted technique scheme, the utlity model has following superiority:

1, this synthesis wooden sleeper has that production efficiency is high, cost is low, density is little, bearing strength is large, operation is easy, cost performance advantages of higher.This moulding process can meet the continuously shaped requirement of integral of all size sleeper, and this sandwich structure synthesis wooden sleeper has that density is little, bearing strength is large, operation is easy, cost performance advantages of higher simultaneously.

2, the utility model utilizes continuously shaped equipment to prepare light sandwich structure synthesis wooden sleeper, serialization and automated production have been realized, greatly improved production efficiency, reduce following process link simultaneously, reduced cost of production, and the synthesis wooden sleeper excellent combination property of preparation, quality is light, stable performance, good mechanical performance, corrosion resistance is good, in certain field, can be used as sleeper and other bearing structure material.

Accompanying drawing explanation

Fig. 1 is sandwich structure synthesis wooden sleeper sectional drawing.

Fig. 2 is sandwich structure synthesis wooden sleeper schematic cross-section.

Fig. 3 is for being transition intermediate layer synthesis wooden sleeper schematic cross-section.

Fig. 4 is for soaking damp equipment schematic diagram.

Fig. 5 is continuous forming process schematic diagram.

In figure: 1, continuous fibre enhancement polyurethane froth bed; 2, foam core material; 3, transition intermediate layer; 4, roving; 5, foaming machine; 6, soak damp equipment lower panel; 7, soak the plate stripper plate of damp equipment; 8, soak damp device structure type stripper plate; 9, continuous rolling former.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is made a detailed explanation.

Embodiment

Sandwich structure synthesis wooden sleeper continuous forming process comprises guide, foam core material conveying, foaming machine injecting glue, evenly soaks pool, moulding, six operations of cutting, and each operation is described below:

(1) guide.

680 bundle 9600Tex woven glass roving fabrics 4 are guided to required cross section by yarn guide, 2 layers of collection yarn plate, and the speed of service is 0.4m/min.

(2) foam core material is carried.

The polyurethane foam of prefabricated density 250 kg/m3 is prefabricated into foam core material 2, the foam core material 2 that cross section is 150mm * 100mm to be transported in the continuously shaped equipment 9 of synthesis wooden sleeper with the speed of 0.4m/min equally.

(3) foaming machine injecting glue.

PPG, PPG, catalyzer, blowing agent, fire retardant, age resistor, isocyanates are mixed in foaming machine 5 in the ratio of 70:30:0.15:0.8:20:0.5:110, with the flow of 4.4kg/min, be evenly sprayed on the upper surface of fibrage 4.

(4) evenly soak pool.

As Fig. 4, after the glue spraying of yarn bundle surface, enter rapidly and soak damp equipment and evenly soak pool.By soaking the height of the plate stripper plate 7 of damp equipment, control, and soak the plate stripper plate 7 of damp equipment and move back and forth and make polyurethane evenly soak damp yarn bundle by 40 beats/min of frequencies at vertical yarn bundle direct of travel.

(5) moulding.

The fiber bundle and the foam core material 2 that soak the roving 4 of crossing resin in pool are introduced in the die cavity of continuous rolling former 9 by the tractive force of continuous rolling former 9, rolling former four sides synchronous circulating rotates, die cavity overall length is 25m, die cavity is of a size of 210mm * 140mm, die cavity temperature control is 85 ℃, and gait of march is 0.4m/min.

(6) cutting.

After goods are exported from continuous rolling former 9, by the chill station of certain length 15m, adopt automatic cutting equipment to cut by the siding-to-siding block length of 3m～2.7m, complete the moulding of synthesis wooden sleeper.

The utility model relates to a kind of novel sandwich structure synthesis wooden sleeper.In document and patent, have no this respect report at home at present.This patented technology is mainly used in the continuously shaped of sandwich structure synthesis wooden sleeper, has that density is little, bearing strength is large, operation is easy, cost performance advantages of higher, and this sandwich structure synthesis wooden sleeper can be used for sleeper and other bearing structure material.Be with a wide range of applications and significant economic benefit.

Claims (3)

1. a novel sandwich structure synthesis wooden sleeper, it is characterized in that: this synthesis wooden sleeper is sandwich structure, synthesis wooden sleeper skin is continuous fibre enhancement polyurethane froth bed (1), its thickness is 10mm～50mm, synthesis wooden sleeper inside is foam core material (2), and its shape of cross section is four jiaos of square or rectangulars that are rounded down.

2. novel sandwich structure synthesis wooden sleeper according to claim 1, is characterized in that: described synthesis wooden sleeper outer layer thickness is 20mm, and described foam core material (2) shape of cross section is rectangle.

3. novel sandwich structure synthesis wooden sleeper according to claim 1, is characterized in that: between the skin of described synthesis wooden sleeper and foam core material (2), increase that to have transition intermediate layer (3), transition intermediate layer (3) be layer of polyurethane or phenolic resins layer.