CN109318444A - A kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet and its manufacture craft - Google Patents

Abstract

The invention discloses a kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet and its manufacture crafts, belong to rubber product technology field.The present invention includes high density outer layer and low-density internal layer, for the integral structure with mold depanning；The material of the high density outer layer and low-density internal layer is respectively high density sizing material and low-density sizing material, also uniformly buries the spring supporting being longitudinally and/or laterally distributed being covered with perpendicular to tray body horizontal plane in the low-density internal layer；And the two-way injection of dual-density rubber material, foaming and sulfuration process are completed in a mold using foaming-vulcanization trays production system in the two-way injection mold of dual density and is made, it solves insufficient rubber pallet elasticity, the injection of dual density pallet and foaming, vulcanization separately to carry out, energy consumption, time-consuming, problem at high cost.

Description

A kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet and its manufacture craft

Technical field

The invention belongs to rubber product technology fields, specifically, being related to a kind of high-strength high-elasticity dual density mould Interior foamed rubber-plastic pallet and its manufacture craft.

Background technique

Chinese national standard " logistics terms " is to the definition of pallet (pallet): being used for packaging, stacking, carrying and transport Place as the cargo of unit load and the levelling bench arrangement of product.As a kind of unit load devices similar with container, Pallet has been widely used in the fields such as production, transport, storage and circulation.

Pallet generally has a foot or beam below upper flat plate and upper flat plate, some pallets there are also lower plate be connected to foot or The lower section of person's beam.According to the shape of pallet, plane and grid type can be divided into according to the shape of plate；According to the number of plate It is divided into single deck pallet and double-deck pallet；It is divided into nine footrest disks, river word pallet and field word pallet according to using foot or beam.Institute Pallet pattern abundant, such as nine foot single deck pallet of network, nine foot single side of plane are formed after permutation and combination with above-mentioned pattern Pallet, grid river word single deck pallet ... etc., have different moulder moistures in different occasions.

The plastics system or rubbery system of the existing general identical material of style type pallet, although two kinds of systems are all answered extensively With, but all have the shortcomings that corresponding:

The plastic material price of the first system is high, and chance high temperature easily softens and wearability is poor；The molding side of plastic pallet Formula mainly has injection molding method, extrusion-hollow blow molding method, vacuum suction moulding method.These modes are by pallet integration Molding, processing cost are relatively high.Therefore occur built-up pallet in recent years, plate and foot or beam are processed respectively, then It is assembled.Whether this mode significantly reduces cost, but assemble secured, and the convenience of assembling, is to need to examine The problem of worry.

In second of system, the molding and vulcanization of rubber and plastic pallet, which will separate, to be carried out, although material cost is relatively low, work Skill higher cost, moreover, if there is hole in inside, sulfidation is difficult to ensure entire semi-finished product vulcanization uniformly in sulfidation, Finished product dynamic balancing effect is poor, and after vulcanization, intrapore high pressure gas is also easy to rapid expanding in die sinking and explodes, and causes hole Gap thin-walled ruptures and becomes waste product, and in technical process, rejection rate is higher；It should also be noted that, vulcanization is in dedicated vulcanization machine It carries out, need to pressurize again, heat to rubber product, consume energy, is time-consuming, at high cost, being a big disadvantage of rubber product technique.

Moreover, all there is damping effect difference in two kinds of systems, and for being easy during out of stock or rotation cargo, mistake Hard contact is easy to produce causes cargo to damage because of damping effect difference.

Solving problem above can be considered dual density system, because of the size of rubber density itself, with it containing gas bubble (hair Bubble) it is related, by gas foaming, the rubber material of different densities is obtained, it is general to use two sets to reach dual-density rubber product Injection mechanism not only increases equipment cost, but also increases occupation area of equipment.

Through retrieving, Chinese patent publication No. CN 102952317 B, publication date 2018.04.06, denomination of invention: Yi Zhongmu Composite pallet is moulded, is made from the following raw materials in parts by weight: high density polyethylene (HDPE) 50-60, copolymerized type propene polymer 20-30, modification Wood powder 30-40, recycled plastics polymers 40-50, calcium activated 20-30, zinc stearate 1-2, calcium stearate 1-2, the positive fourth of methacrylic acid Ester 2-3, polyethylene wax 0.3-0.5, vinyltriethoxysilane 0.4-0.6, antioxidant 1010 0.3-0.4, anti-aging agent MB0.4-0.6, foaming control agent 8-10, ACM4-8, MBS4-8, oxidized polyethylene wax 25-30, foaming agent 0.2-0.3, TPE4- 8, chliorinated polyvinyl chloride 8-12, glass fibre 5-8, semi-reinforcing hydrocarbon black 3-4.The invention limits technique from formula and process conditions Process, using traditional process equipment, production Plastic-wooden composite tray, injection and vulcanization are separately carried out, and consume energy, is time-consuming, at high cost.

Summary of the invention

1. technical problems to be solved by the inivention

Poor rubber and plastic pallet damping effect, the injection of dual density pallet and vulcanization separately progress exists in the prior art to overcome, Energy consumption, time-consuming, problem at high cost, the present invention provide a kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet and its system Make technique.Dual-density rubber tray design of the invention density layer structure in pairs；During it makes, by double-density injection molding, hair Bubble and vulcanization plant are integrated, reduce cost, the molding time of pallet product, and reduce energy consumption, moreover it is possible to disappear Except shipping expense between pallet article process.

2. technical solution

To solve the above problems, the present invention adopts the following technical scheme:

A kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet, including high density outer layer and low-density internal layer are With the integral structure of mold depanning；The material of the high density outer layer and low-density internal layer is respectively high density sizing material and low close Sizing material is spent, also uniformly buries in the low-density internal layer and to be covered with being longitudinally and/or laterally distributed perpendicular to tray body horizontal plane Spring supporting；And it is completed in a mold using foaming-vulcanization trays production system in the two-way injection mold of dual density double The two-way injection of density sizing material, foaming and sulfuration process are made, and can effectively avoid pallet product in the circulation of each process, to reduce Production cost.

Further embodiment, spring-supported both ends are fixed with connecting plate, facilitate spring supporting synchronous in mold It is preset and fixed, preset spring supporting is carried out before the vulcanization of rubber, connecting plate can effectively improve spring branch tight against high density outer layer The bond strength of support and rubber, in the embeddable spring gap of rubber, spring may be selected it is consistent with low-density rubber layer elasticity, To reinforce the support strength of low-density internal layer, it synchronous with spring can restore, play the role of skeletal support；Same mold is raw It produces, the bond strength of spring and rubber is big, and composite effect is good, slows down elastic extenuation caused by low-density internal layer frequent deformation.

Further embodiment, low-density gum base ingredients are to add foaming agent in high density gum base ingredients.

Further embodiment, foaming-vulcanization trays production system includes pressing mold vulcanization in the two-way injection mold of dual density The symmetrically arranged two injections machine base of platform and its left and right sides further includes the die venting of side before or after pressing mold vulcanizes platform And inflation mechanism；Pressing mold molding and foaming vulcanization plant are fixed on the pressing mold vulcanization platform；Divide on 2 injections machine base It is not fixed with sizing material injection device, 2 sizing material injection devices are oppositely arranged, respectively high density sizing material injection device and low-density Sizing material injection device；The pressing mold molding and foaming vulcanization plant include two mold cores that shape is identical, specification is different, institute It is respectively that two kinds of different plasticized rubber material of density are corresponding not to state high density sizing material injection device and low-density sizing material injection device Same mold core is successively injected into the mold of pressing mold molding and foaming vulcanization plant, and the die venting and inflation mechanism exist The air in the mold of pressing mold molding and the vulcanization plant that foams is emptied before injection device injection, is passed through high pressure gas after injection In the mold of pressing mold molding and foaming vulcanization plant, the pressing mold molding and foaming vulcanization plant are to the plasticized rubber material in mold Pressing mold foaming and vulcanization are carried out, foaming-vulcanization trays production system can be by injection moulding, row in the two-way injection mold of dual density Inflation and foaming, vulcanization plant it is integrated, avoid in the prior art each process circulation caused by heat losses and process stream Change into this, multiple pressurization, heating and the secondary glue for solving traditional rubber pallet production technology are pasted, energy consumption, time-consuming, at This high big disadvantage.

Further embodiment, 2 sizing material injection devices include loading hopper, injection cylinder, barrel is injected in plasticizing, plasticizing adds Hot device, injection nozzle control oil cylinder, injection head and injection seat Shift cylinder；The beginning phase of the loading hopper and plasticizing injection barrel It is logical, in the cylinder barrel of the beginning insertion injection cylinder of plasticizing injection barrel, and tight against the injection ram in injection cylinder；The plasticizing The built-in plasticizing injection screw of barrel is injected, the end point of injection screw is plasticized, prestores plasticizing material chamber；It is described to prestore plasticizing material Chamber is connected to by feed pipe with the material chamber that the injection nozzle of plasticizing injection barrel bottom controls oil cylinder front end, the charging of the injection head End is connected to chamber is expected, dispensing end form and foam with the pressing mold mold of vulcanization plant communicates；The injection nozzle controls oil cylinder Cylinder barrel is fixedly connected with the cylinder barrel of injection seat Shift cylinder, and for the piston rod of the two backwards to being arranged, the injection seat Shift cylinder is living Stopper rod and the injection cylinder are both secured on injection machine base, and the plasticizing heater circulating type is fixed on plasticizing injection barrel Outer wall, for being plasticized sizing material.

Further embodiment, pressing mold molding and foaming vulcanization plant include die cylinder, upper mold half, lower mold half, mould Have inner core one, mold core two and mold core rotational fuel tank；The lower mold half is fixed on pressing mold vulcanization platform, and lower mold half is just Top is equipped with upper mold half, and the upper mold half is detachably connected with die cylinder；The die cylinder passes through fixation Frame is fixed；The mold core one is identical with two shape of mold core, specification is different, and the two tail end is opposite, converts with mold core Bracket is detachably fixed, and the mold core conversion support is T-shaped, after mold core rotational fuel tank is inserted into bottom end, with mold core rotational fuel tank Shaft is fixedly connected；The mold core rotational fuel tank driven mold inner core one, mold core two upper mold half and lower mold half it Between convert；Upper mold half, lower mold half, mold core one and mold core two are equipped with according to the shape of tray body；Institute Mold core rotational fuel tank is stated to be fixed on pressing mold vulcanization platform；The pressing mold molding and foaming vulcanization plant further include molding crossbeam, institute The hydraulic stem for stating die cylinder is fixedly connected with upper mold half again after the pilot hole of molding crossbeam；The molding crossbeam is fixed In on the fixed frame that pressing mold formed and foamed vulcanization plant；The pressing mold molding and foaming vulcanization plant further include mold heating Device；The die heater is set to the top of upper mold half and/or the lower part of lower mold half.

Further scheme, the high density sizing material injection device and low-density sizing material injection device respectively include highly dense Degree sizing material injection head and low-density sizing material injection head, the high density sizing material injection head and low-density sizing material injection head are arranged on pressure The mold two sides of mold forming and the vulcanization plant that foams, when injection, and the mould cavity for the vulcanization plant that forms and foam with pressing mold It communicates.

Further scheme, the mold row in the two-way injection mold of dual density in foaming-vulcanization trays production system Gas and inflation mechanism include bracket, cylinder, cylinder block and hydraulic station；The bracket is the annular gantry that there is through-hole in centre, institute It states cylinder to be fixed on the circular table of bracket, the cylinder block is fixed on the bottom of the circular table of bracket, the cylinder The built-in cylinder piston and oil cylinder piston for connecting same piston rod, the cylinder head pass through tracheae and pressure respectively with cylinder block The mold inner-cavity of mold forming and the vulcanization plant that foams communicates；The cylinder block is divided into upper cavity and lower chamber by oil cylinder piston, Two cavitys pass through an oil pipe respectively and communicate with hydraulic station.

Further scheme, mold core conversion support is lift, when sizing material is injected, in driven mold inner core one and mold Core two moves down；The outer arm circulating type of the cylinder is fixed with block heater, and the bottom side of cylinder is provided with cylinder and unloads stomata；It is described The diameter of cylinder is greater than cylinder block.

A kind of production technology of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet, step are as follows:

Step 1: high density stock rubber is plasticized: high density sizing material injection nozzle controls oil cylinder first by high density sizing material feeding Pipe and the closing of high density sizing material injection head, increase density stock rubber pellet by high density sizing material loading hopper and enter high density glue Material plasticizing injection barrel, high density sizing material is plasticized injection screw rotation, and while rotation, high density sizing material plasticizing injection screw is supported Tight high density sizing material injection ram persistently moves back, and the sizing material after plasticizing is intracavitary temporary in high density sizing material plasticizing material；

Step 2: molding: mold core rotational fuel tank rotates mold core conversion support, and mold core one is inserted into upper mold half under At center between half mold, starting die cylinder is moved down, and upper mold half is closed up with lower mold half；

Step 3: vacuumizing: starting hydraulic station, high pressure oil enter cylinder block epicoele by high-pressure oil pipe, push oil cylinder Piston moves down, and oil cylinder piston drives cylinder piston to move together, and upper chamber of air cylinder forms vacuum, and the inner chamber gas of molding is drained；

Step 4: injection: starting high density sizing material injection seat Shift cylinder, after the insertion molding of high density sizing material injection head Upper mold half and lower mold half in, start high density sizing material injection cylinder, high density sizing material injection ram Forward, by high density In high density stock rubber injection mold in sizing material pre-firing material-holding chamber；High density sizing material injection head is closed；Start high density glue Expect injection seat Shift cylinder, high density sizing material injection head is exited into mold, molding is stood after injection；

Step 5: low-density stock rubber is plasticized: low-density sizing material injection nozzle controls oil cylinder first by low-density sizing material feeding Pipe and the closing of low-density sizing material injection head, add low-density stock rubber pellet to enter low-density glue by low-density sizing material loading hopper Material plasticizing injection barrel, low-density sizing material is plasticized injection screw rotation, and while rotation, low-density sizing material plasticizing injection screw is supported Tight low-density sizing material injection ram persistently moves back, and the sizing material after plasticizing is intracavitary temporary in low-density sizing material plasticizing material；

Step 6: die sinking: starting die cylinder moves up, and opens the upper of the tray body for including half of high density outer layer respectively Half mold and lower mold half start mold core rotational fuel tank, and mold core conversion support extracts mold core one out, and by mold core two It is inserted at the center between upper mold half and lower mold half；

Step 7: pre-buried spring: spring being embedded in the tray body of half of high density outer layer of lower mold half, is vulcanized , can be very easily pre-buried by spring in preceding tray body, connecting plate can be disposably pre-buried by spring as a whole, easy to operate；

Step 8: molding: starting die cylinder moves down, and upper mold half is closed up with lower mold half, by two indwelling of mold core；

Step 9: injection: the decline of mold core conversion support reserves the injection position of low-density sizing material injection head；Start low-density Sizing material injection seat Shift cylinder starts in the upper mold half and lower mold half after the insertion molding of low-density sizing material injection head low Density sizing material injection cylinder, low-density sizing material injection ram Forward, by the low-density sizing material in low-density sizing material pre-firing material-holding chamber Rubber injects in mold；Low-density sizing material injection head is closed；Start low-density sizing material injection seat Shift cylinder, by low-density sizing material Injection head exits mold；

Step 10: mold core conversion support rises to original position, start mold core rotational fuel tank, mold core conversion support is by mold core Two extractions；

Step 11: molding again: starting die cylinder moves down, will include respectively the upper mold half of half of tray body with Lower mold half is closed up again, the hollow form after removing inside tray body in mold core two；

Step 12: high-pressure aerated: starting hydraulic station, high pressure oil enter cylinder block cavity of resorption by high-pressure oil pipe, push Oil cylinder piston moves up, and oil cylinder piston drives cylinder piston to move up together, and cylinder piston leads to the pressure high temperature hot gas of upper chamber of air cylinder It crosses air tube and squeezes into upper mold half and lower mold half inner cavity；

Step 13: foaming and vulcanization: heating up to the tray body of upper mold half and lower mold half inner cavity and pressurization, adjusts Die cylinder back pressure makes die cylinder switch to floating position, and foaming agent reduces foaming, and rubber swelling is made to form spongy state, Pressure maintaining is carried out again, heat preservation, protects the time, reaches cures requirements；

Step 14: pressure release: by internal high temperature and high pressure gas pressure release；

Step 15: die sinking: starting die cylinder moves up, and opens upper mold half and lower mold half, takes out tray body.

3. beneficial effect

Compared with prior art, the present invention has the following obvious advantages:

(1) high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the invention, the carcass setting of double-layer structure, can increase Add elastic effect, without additional inflation, low-density internal layer is buried when being covered with spring supporting, plays the role of skeletal support, same mold The bond strength of production, spring and rubber is big, and composite effect is good, and spring is optional consistent with low-density caoutchouc elasticity, with The support strength for reinforcing low-density internal layer slows down the decaying of elastic fatigue caused by low-density internal layer frequent deformation；

(2) high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the invention, spring-supported end is fixed with company Fishplate bar facilitates spring supporting synchronous preset and fixed in mold, preset spring supporting is carried out before the vulcanization of rubber, can be effective The bond strength for improving spring supporting and rubber, in the embeddable spring gap of rubber, can recovery synchronous with spring, play increasing The supporting role of strong skeleton；

(3) high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the invention, high density sizing material injection device can be infused Penetrate high density sizing material rubber material (such as density=1), low-density sizing material injection device injectable low-density sizing material (such as density=0.5), High density sizing material mold core (by exchanging oil cylinder control for) is set in advance in die cavity, after the completion of injection, opens mold, exchanges high density glue for Mold core is expected to low-density sizing material mold core, and Guan Bi mould carries out the injection of low-density sizing material and (mixes in advance according to the technological requirements in sizing material Have foaming agent), temperature-pressure is molded, the decomposition of its foaming agent is made to release gas, adjusts (the die cylinder switching of die cylinder back pressure To floating position), foaming agent decomposes the inflation for releasing gas associating die venting and inflation mechanism, it is sufficient to overcome by rubber bag It encloses to form cell pressure, rubber swelling is made to form spongy state, then carry out pressure maintaining, heat preservation, protect the time, reach cures requirements, open Mould takes out product, converts without process, easy to operate, high production efficiency；

(4) high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the invention, high density sizing material and low-density glue Expect component formula, the high density outer layer and low-density internal layer of generation comply fully with the comparison requirement of dual-layer density, pallet obtained Elasticity and wearability are high, and resistance to tearing is strong, can act synergistically with spring supporting, further increase pallet elasticity and wearability；

(5) high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the invention, can complete in a system mold Injection, foaming, vulcanization manufacturing process can effectively solve secondary pressurization again in rubber pallet production process, heats, causes to consume Energy, time-consuming, problem at high cost to reduce the cost of rubber product, molding time, reduce energy consumption, and can eliminate rubber system Shipping expense between product process；It furthermore reduces reheating bring noxious gas emission, reduces reheating and brings Rubber pallet rejection rate, reduce reheating pressurization bring energy consumption, achieved the effect that environmental protection and energy saving；Mold Exhaust and hollow inflatable mechanism are integrated by inflatable and exhaust device by same piston rod, reciprocal by hydraulic station driving piston rod Mobile, piston moves back pumping, and piston Forward is inflated, and cylinder piston and oil cylinder piston area ratio are the ratio of oil pressure and air pressure Value adjusts hydraulic station pressure, it is ensured that the blowing pressure, the speed of piston traveling speed is related with flow of aerating air in mold, adjusts High pressure oil flow, i.e., the controllable piston speed of service, can meet flow of aerating air, and then reach the blowing pressure and purging vacuum degree Requirement；

(6) high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the invention, to guarantee its flexibility, dual density is double Into injection mold, foaming-vulcanization trays production system makes full use of the axial force in plasticizing injection screw rotary course backward Effect is not necessarily to apply extra power to plasticizing injection screw, and plasticizing material chamber can be realized and be gradually increased and reach what sizing material was kept in Purpose；Die heater makes sizing material keep stable soft state in sulfidation, moreover, stomata is automatic after sizing material foaming Sealing is not necessarily to secondary seal, in turn ensures vulcanization effect；

(7) high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the invention, the two-way injection foam-in-mould of dual density The molding of the entire mold of molding-vulcanization trays production system (including upper mold half, lower mold half and mold core one, two) It accomplishs without any letup with seal operation, it is simple, convenient quick；

(8) production technology of the invention can continue production free of discontinuities, production efficiency and high degree of automation.

Detailed description of the invention

Fig. 1 is top view after middle-high density outer layer of the present invention removal；

Fig. 2 is longitudinal sectional view of the invention；

Fig. 3 is the operation system structure schematic diagram in the present invention；

Fig. 4 is schematic diagram after the mould part amplification in the present invention；

Fig. 5 is that rear side viewing schematic diagram is amplified in the pressing mold molding and foaming vulcanization plant part in the present invention；

Fig. 6 is schematic diagram after die venting and the amplification of inflation mechanism part in the present invention.

In figure: 1, injecting machine base；2, high density sizing material injection device；3, pressing mold molding and foaming vulcanization plant；4, low Density sizing material injection device；5, pressing mold vulcanizes platform；6, tray body；7, tracheae；8, die venting and inflation mechanism；21, highly dense Spend sizing material loading hopper；22, high density sizing material injection cylinder；23, high density sizing material plasticizing injection barrel；24, high density sizing material is moulded Change heater；25, high density sizing material prestores plasticizing material chamber；26, high density sizing material feed pipe；27, high density sizing material injection nozzle control Liquefaction cylinder；28, high density sizing material injection head；29, high density sizing material injection seat Shift cylinder；31, die cylinder；32, molding is horizontal Beam；33, upper mold half；34, lower mold half；35, mold core one；36, mold core two；37, mold core conversion support；38, mould Has heater；39, mold core rotational fuel tank；41, low-density sizing material loading hopper；42, low-density sizing material injection cylinder；43, low-density Sizing material plasticizing injection barrel；44, low-density sizing material is plasticized heater；45, low-density sizing material prestores plasticizing material chamber；46, low-density Sizing material feed pipe；47, low-density sizing material injection nozzle controls oil cylinder；48, low-density sizing material injection head；49, low-density sizing material is injected Seat Shift cylinder；61, high density outer layer；62, low-density internal layer；63, spring supporting；64, connecting plate；80, cylinder connecting tube connects Head；81, cylinder；82, block heater；83, cylinder unloads stomata；84, cylinder block；85, oil pipe；86, hydraulic station；88, piston Bar；89, bracket；221, high density sizing material injection ram；231, high density sizing material is plasticized injection screw；421, high density sizing material is infused Penetrate piston；431, high density sizing material is plasticized injection screw；811, cylinder piston；812, support limit block；813, refractory seals Circle；841, oil cylinder piston.

Specific embodiment

To further appreciate that the contents of the present invention, this present invention is described in detail in conjunction with attached drawing.

Embodiment 1

The high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, as shown in Figure 1, 2, including outside high density Layer 61 and low-density internal layer 62, for the integral structure with mold depanning；The high density outer layer 61 and low-density internal layer 62 Material is respectively high density sizing material and low-density sizing material, also uniformly buries and is covered with perpendicular to tray body in the low-density internal layer 62 The equally distributed spring supporting 63 in the longitudinal direction of 6 horizontal planes, plays the role of skeletal support by settable 3 to 6, is similar to concrete In reinforcing bar, spring may be selected it is consistent with low-density caoutchouc elasticity, to reinforce the support strength of low-density internal layer, slow down low The decaying of elastic fatigue caused by density inner layer frequent deformation.

High density gum base ingredients formula and its respective parts by weight include: 35~55 parts of compounded rubber, reclaimed rubber 40~60 Part, 3~5 parts of carbon black, 4~8 parts of butadiene rubber, 0.2~0.5 part of polyethylene glycol, 0.8~1.8 part of compound accelerant, stearic acid 0.4~0.7 part, 2~5 parts of zinc oxide, 1.5~3.8 parts of composite vulcanizing agent；Sole elasticity and wearability obtained are strong, in hardness Property.Compounded rubber is naphthenic oil, butyl rubber, butadiene rubber, natural rubber, white carbon black, the black N330 of black wood charcoal, stearic acid, zinc oxide With the composition of secondary K glue plastics；The carbon black is carbon black N330；The polyethylene glycol is PEG-4000；The compound promotion The composition that agent is 0.3~0.8 part and 0.5~1 part of CZ promotor of parts by weight DM-80 promotor；The composite vulcanizing agent is attached most importance to Measure 1~3 part and 0.5~0.8 part of DTDM vulcanizing agent of part S-80 vulcanizing agent of composition.Secondary K glue plastics, i.e. K glue regenerated plastics, K glue, that is, butadiene-styrene polymer, selects in the present embodiment clear, colorless, garden spherical or the K glue of ellipse garden shape particle is regenerating Plastics, dosage are 10% or so of compounded rubber gross weight, and the size of particle should be 2~5mm in any direction, be not contain more than The metal impurities of 0.3um mechanical admixture visible with other.Its apparent density is about 1.01g/cm³, bulk density is about 0.62g/ cm³, bending strength >=34Mps, thermal deformation >=70 DEG C, elongation at break >=160%, hardness >=71Shore D, gamma transition temperature Spend 115 DEG C of -70 ∽, impact strength >=27J/m.Low-density gum base ingredients are to add foaming agent in high density gum base ingredients, are foamed Agent is that chemical foaming agent can be H series, AC series etc.；Can also use swelling agent, for physical blowing agent can be expandable microspheres, Supercritical CO₂Deng；Additive amount is the 1.0~5.0% of gross weight, and tire flexibility made from the component and wearability are high, tear-resistant Property is strong.

The high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, using being sent out in the two-way injection mold of dual density Soak that type-vulcanization trays production system completes the two-way injection of dual-density rubber material in a mold, foaming and sulfuration process are made, It can effectively avoid pallet product in the circulation of each process, reduce production cost.As shown in Fig. 3,4,5,6, the two-way injection of dual density Foam-in-mould molding-vulcanization trays production system includes pressing mold vulcanization platform 5 and its symmetrically arranged two injectors in the left and right sides Pedestal 1 further includes the die venting and inflation mechanism 8 of side before or after pressing mold vulcanizes platform 5；It is solid on the pressing mold vulcanization platform 5 Surely there are pressing mold molding and foaming vulcanization plant 3；Sizing material injection device, 2 glue are respectively fixed on 2 injections machine base 1 Material injection device is oppositely arranged, respectively high density sizing material injection device 2 and low-density sizing material injection device 4；It is described to be compression molded into Type and foaming vulcanization plant 3 include two mold cores that shape is identical, specification is different, the high density sizing material injection device 2 Two kinds of different plasticized rubber material of density different mold cores is corresponded to respectively with low-density sizing material injection device 4 successively to inject In the mold for entering pressing mold molding and foaming vulcanization plant 3, the die venting and inflation mechanism 8 injection device 2 inject it is preceding will Air emptying in the mold of pressing mold molding and foaming vulcanization plant 3, is passed through pressing mold molding and foaming for high pressure gas after injection In the mold of vulcanization plant 3, the pressing mold molding and foaming vulcanization plant 3 carry out pressing mold foaming to the plasticized rubber material in mold And vulcanization, foaming-vulcanization trays production system can be by injection moulding, inflatable and exhaust and hair in the two-way injection mold of dual density Bubble, vulcanization plant are integrated, avoid heat losses caused by each process circulation in the prior art and process circulation cost, solve Multiple pressurization, heating and the secondary glue of traditional rubber pallet production technology are pasted, energy consumption, time-consuming, at high cost one big Disadvantage.

High density sizing material injection device 2 includes high density sizing material loading hopper 21, high density sizing material injection cylinder 22, high density Sizing material plasticizing injection barrel 23, high density sizing material plasticizing heater 24, high density sizing material injection nozzle control oil cylinder 27, high density glue Expect injection head 28 and high density sizing material injection seat Shift cylinder 29；The high density sizing material loading hopper 21 is plasticized with high density sizing material The beginning of injection barrel 23 communicates, the beginning insertion high density sizing material injection cylinder 22 of high density sizing material plasticizing injection barrel 23 In cylinder barrel, and tight against the injection ram in high density sizing material injection cylinder 22；It is high built in high density sizing material plasticizing injection barrel 23 Density sizing material is plasticized injection screw, and high density sizing material is plasticized the end point of injection screw, and reserved high density sizing material prestores plasticizing material Chamber 25；The high density sizing material prestores plasticizing material chamber 25 and passes through high density sizing material feed pipe 26 and high density sizing material plasticizing injection spiral shell Cylinder 23 bottoms high density sizing material injection nozzle control 27 front end of oil cylinder material chamber connection, the high density sizing material injection head 28 into Material end is connected to material chamber, and dispensing end is communicated with the mold of pressing mold vulcanization plant 3；High density sizing material injection nozzle controls 27 cylinder barrel of oil cylinder It is fixedly connected with the cylinder barrel of high density sizing material injection seat Shift cylinder 29, the piston rod of the two backwards to being arranged, infuse by high density sizing material It penetrates 29 piston rod of a Shift cylinder and the injection cylinder is both secured on injection machine base 1, high density sizing material is plasticized heater 24 circulating types are fixed on the outer wall of high density sizing material plasticizing injection barrel 23, the plasticizing of sizing material and are temporarily stored in same height before injection It is carried out in density sizing material plasticizing injection barrel 23, while plasticizing, is prestored in plasticizing material chamber 25 in high density sizing material and complete injection Preceding is temporary, avoids the transhipment of sizing material.Likewise, low-density sizing material injection device 4 includes low-density sizing material loading hopper 41, low Density sizing material injection cylinder 42, low-density sizing material plasticizing injection barrel 43, low-density sizing material are plasticized heater 44, low-density sizing material Injection nozzle controls oil cylinder 47, low-density sizing material injection head 48 and low-density sizing material injection seat Shift cylinder 49；The low-density glue Material loading hopper 41 is communicated with the beginning that low-density sizing material is plasticized injection barrel 43, the beginning of low-density sizing material plasticizing injection barrel 43 It is inserted into the cylinder barrel of low-density sizing material injection cylinder 42, and tight against the injection ram in low-density sizing material injection cylinder 42；It is low close Low-density sizing material built in spending sizing material plasticizing injection barrel 43 is plasticized injection screw, and low-density sizing material is plasticized the end of injection screw Place, reserved low-density sizing material prestore plasticizing material chamber 45；The low-density sizing material prestores plasticizing material chamber 45 and is sent by low-density sizing material The material chamber of low-density sizing material injection nozzle control 47 front end of oil cylinder of expects pipe 46 and low-density sizing material plasticizing injection 43 bottom of barrel connects Logical, the feed end of the low-density sizing material injection head 48 is connected to material chamber, and dispensing end is communicated with the mold of pressing mold vulcanization plant 3； Low-density sizing material injection nozzle control 47 cylinder barrel of oil cylinder is fixedly connected with the cylinder barrel of low-density sizing material injection seat Shift cylinder 49, the two Piston rod backwards to being arranged, 49 piston rod of low-density sizing material injection seat Shift cylinder and the injection cylinder are both secured to injector On pedestal 1, low-density sizing material plasticizing 44 circulating type of heater is fixed on the outer wall of low-density sizing material plasticizing injection barrel 43, sizing material Plasticizing and injection before be temporarily stored in same low-density sizing material plasticizing injection barrel 43 and carry out, while plasticizing, in low-density Sizing material, which prestores, is plasticized keeping in front of completing injection in material chamber 45, avoids the transhipment of sizing material.

Embodiment 2

The high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, basic structure improve it with embodiment 1 Be in: the both ends of spring supporting 63 are fixed with connecting plate 64, after connecting plate 64 links together spring supporting 63, in length and breadth It is interspersed, facilitates spring supporting synchronous preset and fixed in mold, preset spring supporting can be carried out before the vulcanization of rubber 63, connecting plate 64 can effectively improve the bond strength of spring supporting and rubber, the embeddable spring of rubber tight against high density outer layer 61 In gap, synchronous with spring it can restore；As shown in Figure 4,5, pressing mold molding and foaming vulcanization plant 3 include die cylinder 31, upper mold half 33, lower mold half 34, mold core 1, mold core 2 36 and mold core rotational fuel tank 39；The female die Tool 34 is fixed on pressing mold vulcanization platform 5, and the surface of lower mold half 34 is equipped with upper mold half 33, the upper mold half 33 It is detachably connected with die cylinder 31；The die cylinder 31 is fixed by fixed frame；In the mold core 1 and mold 2 36 shape of core is identical, specification is different, and the two tail end is opposite, is detachably fixed with mold core conversion support 37, and the mold core turns It is T-shaped to change bracket 37, after mold core rotational fuel tank 39 is inserted into bottom end, is fixedly connected with the shaft of mold core rotational fuel tank 39；The mould 39 driven mold inner core 1 of core rotational fuel tank, mold core 2 36 are converted between upper mold half 33 and lower mold half 34；On Half mold 33, lower mold half 34, mold core 1 and mold core 2 36 are equipped with according to the shape of tray body 6；Institute Mold core rotational fuel tank 39 is stated to be fixed on pressing mold vulcanization platform 5；The pressing mold molding and foaming vulcanization plant 3 further include molding crossbeam 32, the hydraulic stem of the die cylinder 31 is fixedly connected with upper mold half 33 again after passing through the pilot hole for molding crossbeam 32；It is described Molding crossbeam 32 is fixed on the fixed frame of pressing mold molding and foaming vulcanization plant 3；The pressing mold molding and foaming vulcanization plant 3 It further include die heater 38；The die heater 38 is set under top and/or the lower mold half 34 of upper mold half 33 Portion.High density sizing material injection device 2 and low-density sizing material injection device 4 respectively include high density sizing material injection head 28 and low-density Sizing material injection head 48, the high density sizing material injection head 28 and low-density sizing material injection head 48 are arranged on pressing mold molding and foaming sulphur 3 mold two sides are set in makeup, and when injection, and the mould cavity for the vulcanization plant 3 that forms and foam with pressing mold communicates.Such as Fig. 6 institute Show, the die venting and inflation mechanism 8 in the two-way injection mold of dual density in foaming-vulcanization trays production system include bracket 89, cylinder 81, cylinder block 84 and hydraulic station 86；The bracket 89 is the annular gantry that there is through-hole in centre, and the cylinder 81 is solid Due on the circular table of bracket 89, the cylinder block 84 is fixed on the bottom of the circular table of bracket 89, the cylinder 81 With the cylinder piston 811 and oil cylinder piston 841 of the built-in same piston rod 88 of connection of the difference of cylinder block 84,81 top of cylinder It is formed by tracheae 7 with pressing mold and the mold inner-cavity of foaming vulcanization plant 3 communicates；The cylinder block 84 is by oil cylinder piston 841 It is divided into upper cavity and lower chamber, two cavitys pass through an oil pipe 85 respectively and communicate with hydraulic station 86.Mold core conversion support 37 is lifting Formula, when sizing material is injected, driven mold inner core 1 and mold core 2 36 are moved down, and can be the reserved injection position of injection.The cylinder 81 outer arm circulating type is fixed with block heater 82, and the bottom side of cylinder 81 is provided with cylinder and unloads stomata 83；The cylinder 81 Diameter is greater than cylinder block 84.

High density gum base ingredients formula and its respective parts by weight include: 35 parts of compounded rubber, and 40 parts of reclaimed rubber, carbon black 3 Part, 4 parts of butadiene rubber, 0.2 part of polyethylene glycol, 0.8 part of compound accelerant, 0.4 part of stearic acid, 2 parts of zinc oxide, composite vulcanizing agent 1.5 part.Compounded rubber is naphthenic oil, butyl rubber, butadiene rubber, natural rubber, white carbon black, the black N330 of black wood charcoal, stearic acid, oxidation The composition of zinc and secondary K glue plastics；The carbon black is carbon black N330；The polyethylene glycol is PEG-4000；The compound rush The composition for being 0.3 part and 0.5 part of CZ promotor of parts by weight DM-80 promotor into agent；The composite vulcanizing agent is parts by weight S- 80 1 part of vulcanizing agents and 0.5 part of DTDM vulcanizing agent of composition.Select clear, colorless, garden spherical in secondary K glue plastics the present embodiment The K glue of particle is 10% or so of compounded rubber gross weight in regenerated plastics, dosage, and the size of particle should be in any direction 2mm is not contain more than metal impurities mechanical admixture visible with other of 0.3um.Its apparent density is about 1.01g/cm³, accumulation Density is about 0.62g/cm³, bending strength >=34Mps, thermal deformation >=70 DEG C, elongation at break >=160%, hardness >= 71Shore D, 115 DEG C of -70 ∽ of glass transition temperature, impact strength >=27J/m.Low-density gum base ingredients are high density sizing material group H series foaming agent is added in point, dosage is the 2% of gross weight.

The production technology of the high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, step are as follows:

Step 1: high density stock rubber is plasticized: high density sizing material injection nozzle control oil cylinder 27 first send high density sizing material Expects pipe 26 and high density sizing material injection head 28 are closed, and are increased density stock rubber pellet by high density sizing material loading hopper 21 and are entered High density sizing material plasticizing injection barrel 23, high density sizing material is plasticized injection screw 231 and rotates, while rotation, high density sizing material Plasticizing injection screw 231 pushes against high density sizing material injection ram 221 and persistently moves back, and the sizing material after plasticizing is plasticized in high density sizing material Expect to keep in chamber 25；

Step 2: molding: mold core rotational fuel tank 39 rotates mold core conversion support 37, and mold core 1 is inserted into upper mold section At center between tool 33 and lower mold half 34, starting die cylinder 31 is moved down, and upper mold half 33 is closed up with lower mold half；

Step 3: vacuumizing: starting hydraulic station 86, high pressure oil enter 84 epicoele of cylinder block by high-pressure oil pipe, push Oil cylinder piston 841 moves down, and oil cylinder piston 841 drives cylinder piston 811 to move together, and 81 epicoele of cylinder forms vacuum, will mold Inner chamber gas drain；

Step 4: injection: high density sizing material injection head 28 is inserted into and closes by starting high density sizing material injection seat Shift cylinder 29 In upper mold half 33 and lower mold half 34 after mould, start high density sizing material injection cylinder 22, high density sizing material injection ram 221 Forward, will be in the high density stock rubber injection mold in high density sizing material pre-firing material-holding chamber 25；High density sizing material injection head 28 It closes；Start high density sizing material injection seat Shift cylinder 29, high density sizing material injection head 28 is exited into mold, is settled into after injection Type；

Step 5: low-density stock rubber is plasticized: low-density sizing material injection nozzle control oil cylinder 47 first send low-density sizing material Expects pipe 46 and low-density sizing material injection head 48 are closed, and are entered by low-density sizing material loading hopper 41 plus low-density stock rubber pellet Low-density sizing material plasticizing injection barrel 43, low-density sizing material is plasticized injection screw 431 and rotates, while rotation, low-density sizing material Plasticizing injection screw 431 pushes against low-density sizing material injection ram 421 and persistently moves back, and the sizing material after plasticizing is plasticized in low-density sizing material Expect to keep in chamber 45；

Step 6: die sinking: starting die cylinder 31 moves up, and opens the tray body for including half of high density outer layer 61 respectively 6 upper mold half 33 and lower mold half 34, starts mold core rotational fuel tank 39, and mold core conversion support 37 takes out mold core 1 Out, and by mold core 2 36 it is inserted at the center between upper mold half 33 and lower mold half 34；

Step 7: pre-buried spring: spring is embedded in the tray body 6 of half of high density outer layer 61 of lower mold half 34 It is interior；, can be very easily pre-buried by spring in tray body before vulcanization, outer ring connecting plate 64 and inner ring connecting plate 65 can be by bullets Spring overall time is pre-buried, easy to operate；

Step 8: molding: starting die cylinder 31 moves down, and upper mold half 33 is closed up with lower mold half 34, by mold core 2 36 indwellings；

Step 9: injection: mold core conversion support 37 declines, and reserves the injection position of low-density sizing material injection head 48；Start low Density sizing material injection seat Shift cylinder 49, by the upper mold half 43 and lower mold half after the insertion molding of low-density sizing material injection head 48 In 44, start low-density sizing material injection cylinder 42, low-density sizing material injection ram 421 moves forward, and low-density sizing material pre-firing is held and is expected In low-density stock rubber injection mold in chamber 45；Low-density sizing material injection head 48 is closed；Start low-density sizing material injection seat Low-density sizing material injection head 48 is exited mold by Shift cylinder 49；

Step 10: mold core conversion support 37 rises to original position, start mold core rotational fuel tank 39, mold core conversion support 37 is by mould Have inner core 2 36 to extract out；

Step 11: molding again: starting die cylinder 31 moves down, and will include the upper mold section of half of tray body 6 respectively Tool 33 closes up again with lower mold half 34, the hollow form after removing inside tray body 6 in mold core 2 36；

Step 12: high-pressure aerated: starting hydraulic station 86, high pressure oil enter 84 cavity of resorption of cylinder block by high-pressure oil pipe, Oil cylinder piston 841 is pushed to move up, oil cylinder piston 841 drives cylinder piston 811 to move up together, and cylinder piston 811 will be on cylinder 81 The pressure high temperature hot gas of chamber squeezes into upper mold half 33 and 36 inner cavity of lower mold half by air tube；

Step 13: foaming and vulcanization: the tray body 6 of upper mold half 33 and 34 inner cavity of lower mold half is heated up and is added Pressure adjusts 31 back pressure of die cylinder, so that die cylinder 31 is switched to floating position, foaming agent reduces foaming, and makes rubber swelling shape It at spongy state, then carries out pressure maintaining, heat preservation, protect the time, reach cures requirements；

Step 14: pressure release: by internal high temperature and high pressure gas pressure release；

Step 15: die sinking: starting die cylinder 31 moves up, and opens upper mold half 33 and lower mold half 34, takes out pallet Ontology 6.

Embodiment 3

The high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, basic structure is the same as embodiment 2；

The high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, low-density gum base ingredients formula and its each It include: 55 parts of compounded rubber from parts by weight, it is 60 parts of reclaimed rubber, 5 parts of carbon black, 8 parts of butadiene rubber, 0.5 part of polyethylene glycol, compound 1.8 parts of promotor, 0.7 part of stearic acid, 5 parts of zinc oxide, 3.8 parts of composite vulcanizing agent.Compounded rubber is naphthenic oil, butyl rubber, suitable The black N330 of buna, natural rubber, white carbon black, black wood charcoal, stearic acid, zinc oxide and secondary K glue plastics composition；The carbon black For carbon black N330；The polyethylene glycol is PEG-4000；The compound accelerant is 0.8 part of parts by weight DM-80 promotor and CZ The composition that 1 part of promotor；The combination that the composite vulcanizing agent is 1 part and 0.5 part of DTDM vulcanizing agent of parts by weight S-80 vulcanizing agent Object.Select the K glue of clear, colorless, ellipse garden shape particle in regenerated plastics in secondary K glue plastics the present embodiment, dosage is compounded rubber 10% or so of gross weight, the size of particle should be 5mm in any direction, be not contain more than 0.3um metal impurities and other It can be seen that mechanical admixture.Its apparent density is about 1.01g/cm³, bulk density is about 0.62g/cm³, bending strength >=34Mps, heat >=70 DEG C of deformation, elongation at break >=160%, hardness >=71Shore D, 115 DEG C of -70 ∽ of glass transition temperature, impact strength ≥27J/m.Low-density gum base ingredients are that AC series foaming agent is added in high density gum base ingredients, and dosage is the 5% of gross weight.

Foaming-vulcanization in the two-way injection mold of dual density of the rubber pallet for producing dual density layer of the present embodiment The basic structure of pallet production system is the same as embodiment 3.

The production technology of the high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, step is the same as embodiment 2.

Embodiment 4

The high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, basic structure improve it with embodiment 3 It is in foaming in the two-way injection mold of dual density of the rubber pallet for producing dual density layer-vulcanization trays production system The basic structure of system is theed improvement is that with embodiment 3: the bottom of the cavity of resorption of cylinder 81 is fixed with support limit block 812, and is The cylinder unloads stomata 83 and reserves airspace, plays cylinder piston and moves down position-limiting action.In the outer rim of cylinder piston 811, with High-temperature resistant seal ring 813 is set between 81 inner wall of cylinder, improves the sealing effect of cylinder upper and lower cavity, and avoids gas in sulfidation Body leakage.High-temperature resistant seal ring 813 is polytetrafluoroethylene (PTFE) or viton seal ring, and service life can be improved, prevent long-term work Gas leakage under state, and ensure that stability when leakproofness and vulcanization in turn；The both ends of tracheae 7 are connected by mold respectively Pipe fitting and cylinder connecting tube connector 80 are fixed in upper mold half 33 and cylinder 81, improve the stability and leakproofness of connection.

High density gum base ingredients formula and its respective parts by weight include: 45 parts of compounded rubber, and 50 parts of reclaimed rubber, carbon black 4 Part, 6 parts of butadiene rubber, 0.35 part of polyethylene glycol, 1.3 parts of compound accelerant, 0.5 part of stearic acid, 4 parts of zinc oxide, composite sulfuration 2.6 parts of agent.Compounded rubber is naphthenic oil, butyl rubber, butadiene rubber, natural rubber, white carbon black, the black N330 of black wood charcoal, stearic acid, oxygen Change the composition of zinc and secondary K glue plastics；The carbon black is carbon black N330；The polyethylene glycol is PEG-4000；It is described compound The composition that promotor is 0.6 part and 0.75 part of CZ promotor of parts by weight DM-80 promotor；The composite vulcanizing agent is parts by weight The composition that 2 parts and 0.65 part of DTDM vulcanizing agent of S-80 vulcanizing agent.The dosage and characteristic of secondary K glue plastics are same in the present embodiment Embodiment 3.Low-density gum base ingredients are to add swelling agent in high density gum base ingredients, and it is micro- to can be expansion for physical blowing agent Ball, supercritical CO₂Deng；Additive amount is the 5.0% of gross weight.

The production technology of the high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet of the present embodiment, step is the same as embodiment 2.

Through detecting, high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet obtained is heat-resisting, wear-resisting, weather-proof, moreover, together The production of one die cavity, quality are stablized, and dynamic balancing even results are good.

Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution Similar frame mode and embodiment, are within the scope of protection of the invention.

Claims (10)

1. a kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet, which is characterized in that including high density outer layer (61) and Low-density internal layer (62), for the integral structure with mold depanning；The high density outer layer (61) and low-density internal layer (62) Material is respectively high density sizing material and low-density sizing material, also uniformly buries and is covered with perpendicular to pallet sheet in the low-density internal layer (62) The spring supporting (63) being longitudinally and/or laterally distributed of body (6) horizontal plane；And it is foamed into the application two-way injection mold of dual density Type-vulcanization trays production system is completed the two-way injection of dual-density rubber material, foaming and sulfuration process in a mold and is made.

2. high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as described in claim 1, which is characterized in that the spring The both ends of support (63) are fixed with connecting plate (64)；The connecting plate (64) is tight against high density outer layer (61).

3. high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as claimed in claim 2, which is characterized in that described low close Degree gum base ingredients are to add foaming agent in high density gum base ingredients.

4. high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as claimed in claim 2, which is characterized in that the double density Spending foaming in two-way injection mold-vulcanization trays production system includes that pressing mold vulcanization platform (5) and its left and right sides are symmetrical arranged Two injection machine bases (1), further include pressing mold vulcanize platform (5) before or after side die venting and inflation mechanism (8)；

Pressing mold molding and foaming vulcanization plant (3) are fixed on pressing mold vulcanization platform (5)；On 2 injection machine bases (1) Be respectively fixed with sizing material injection device, 2 sizing material injection devices are oppositely arranged, respectively high density sizing material injection device (2) and Low-density sizing material injection device (4)；The pressing mold molding and foaming vulcanization plant (3) include that two shapes are identical, specification is different Mold core, the high density sizing material injection device (2) and low-density sizing material injection device (4) respectively by density it is different two Kind plasticized rubber material corresponds to different mold cores and is successively injected into the mold of pressing mold molding and foaming vulcanization plant (3), institute Stating die venting and inflation mechanism (8) will be in the mold of pressing mold molding and foaming vulcanization plant (3) before injection device (2) injection Air emptying, high pressure gas is passed through in the mold of pressing mold molding and foaming vulcanization plant (3) after injection, pressing mold molding And foaming vulcanization plant (3) carries out pressing mold foaming and vulcanization to the plasticized rubber material in mold.

5. high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as claimed in claim 4, which is characterized in that described 2 Sizing material injection device includes loading hopper, injection cylinder, plasticizing injection barrel, plasticizing heater, injection nozzle control oil cylinder, injection Head and injection seat Shift cylinder；The loading hopper is communicated with the beginning of plasticizing injection barrel, the beginning insertion of plasticizing injection barrel In the cylinder barrel of injection cylinder, and tight against the injection ram in injection cylinder；The plasticizing injection barrel is built-in to be plasticized injection screw, It is plasticized the end point of injection screw, prestores plasticizing material chamber；The plasticizing material chamber that prestores passes through feed pipe and plasticizing injection spiral shell The material chamber connection of the injection nozzle control oil cylinder front end of cylinder bottom, the feed end of the injection head are connected to material chamber, dispensing end and institute The mold for stating pressing mold molding and foaming vulcanization plant (3) communicates；The injection nozzle control cylinder tube and injection seat Shift cylinder Cylinder barrel be fixedly connected, backwards to being arranged, the injection seat Shift cylinder piston rod and the injection cylinder are equal for the piston rod of the two It is fixed in injection machine base (1), the plasticizing heater circulating type is fixed on the outer wall of plasticizing injection barrel.

6. high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as claimed in claim 5, which is characterized in that the pressing mold Molding and foaming vulcanization plant (3) include die cylinder (31), upper mold half (33), lower mold half (34), mold core one (35), mold core two (36) and mold core rotational fuel tank (39)；The lower mold half (34) is fixed in pressing mold vulcanization platform (5), It is equipped with right above lower mold half (34) upper mold half (33), the upper mold half (33) and die cylinder (31) are removable Unload connection；The die cylinder (31) is fixed by fixed frame；The mold core one (35) and mold core two (36) shape It is identical, specification is different, the two tail end is opposite, is detachably fixed with mold core conversion support (37), the mold core conversion support (37) T-shaped, after mold core rotational fuel tank (39) are inserted into bottom end, it is fixedly connected with the shaft of mold core rotational fuel tank (39)；The mould Core rotational fuel tank (39) driven mold inner core one (35), mold core two (36) upper mold half (33) and lower mold half (34) it Between convert；Upper mold half (33), lower mold half (34), mold core one (35) and mold core two (36) are according to tray body (6) shape is equipped with；The mold core rotational fuel tank (39) is fixed in pressing mold vulcanization platform (5)；

The pressing mold molding and foaming vulcanization plant (3) further include molding crossbeam (32), the hydraulic stem of the die cylinder (31) It is fixedly connected again with upper mold half (33) after the pilot hole of molding crossbeam (32)；The molding crossbeam (32) is fixed on pressing mold On the fixed frame of molding and foaming vulcanization plant (3)；

The pressing mold molding and foaming vulcanization plant (3) further include die heater (38)；Die heater (38) setting In the top of upper mold half (33) and/or the lower part of lower mold half (34).

7. a kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as claimed in claim 6, which is characterized in that described High density sizing material injection device (2) and low-density sizing material injection device (4) respectively include high density sizing material injection head (28) and low Density sizing material injection head (48), the high density sizing material injection head (28) and low-density sizing material injection head (48) are arranged on and are compression molded into Type and the mold two sides of vulcanization plant (3) of foaming, when injection, and the mold mould of vulcanization plant (3) of forming and foam with pressing mold Chamber communicates.

8. a kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as claimed in claim 6, which is characterized in that described Die venting and inflation mechanism (8) in the two-way injection mold of dual density in foaming-vulcanization trays production system include bracket (89), cylinder (81), cylinder block (84) and hydraulic station (86)；The bracket (89) is the annular gantry that there is through-hole in centre, institute It states cylinder (81) to be fixed on the circular table of bracket (89), the cylinder block (84) is fixed on the circular table of bracket (89) Bottom, the cylinder (81) and cylinder block (84) respectively the cylinder piston (811) of the built-in same piston rod (88) of connection and Oil cylinder piston (841), cylinder (81) top pass through in the mold of tracheae (7) and pressing mold molding and foaming vulcanization plant (3) Chamber communicates；The cylinder block (84) is divided into upper cavity and lower chamber by oil cylinder piston (841), and two cavitys pass through an oil pipe respectively (85) it is communicated with hydraulic station (86).

9. a kind of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet as claimed in claim 8, which is characterized in that described Mold core conversion support (37) is lift, and when sizing material is injected, driven mold inner core one (35) and mold core two (36) are moved down；Institute The outer arm circulating type for stating cylinder (81) is fixed with block heater (82), and the bottom side of cylinder (81) is provided with cylinder and unloads stomata (83)；The diameter of the cylinder (81) is greater than cylinder block (84).

10. a kind of production technology of high-strength high-elasticity dual density foam-in-mould rubber and plastic pallet, which is characterized in that step are as follows:

Step 1: high density stock rubber is plasticized: high density sizing material injection nozzle controls oil cylinder (27) first by high density sizing material feeding (26) and high density sizing material injection head (28) closing are managed, density stock rubber grain is increased by high density sizing material loading hopper (21) Expect to be plasticized injection barrel (23) into high density sizing material, high density sizing material is plasticized injection screw (231) rotation, high while rotation Density sizing material plasticizing injection screw (231) pushes against high density sizing material injection ram (221) and persistently moves back, and the sizing material after plasticizing is in height It is kept in density sizing material plasticizing material chamber (25)；

Step 2: molding: mold core rotational fuel tank (39) rotates mold core conversion support (37), and mold core one (35) is inserted into upper half At center between mold (33) and lower mold half (34), starting die cylinder (31) is moved down, upper mold half (33) and female die Tool closes up；

Step 3: vacuumizing: starting hydraulic station (86), high pressure oil enter cylinder block (84) epicoele by high-pressure oil pipe, push Oil cylinder piston (841) moves down, and oil cylinder piston (841) drives cylinder piston (811) to move together, and cylinder (81) epicoele is formed very Sky drains the inner chamber gas of molding；

Step 4: injection: high density sizing material injection head (28) is inserted into and closes by starting high density sizing material injection seat Shift cylinder (29) In upper mold half (33) and lower mold half (34) after mould, start high density sizing material injection cylinder (22), the injection of high density sizing material Piston (221) Forward, will be in the high density stock rubber injection mold in high density sizing material pre-firing material-holding chamber (25)；High density glue Expect that injection head (28) are closed；Start high density sizing material injection seat Shift cylinder (29), high density sizing material injection head (28) is exited Mold stands molding after injection；

Step 5: low-density stock rubber is plasticized: low-density sizing material injection nozzle controls oil cylinder (47) first by low-density sizing material feeding (46) and low-density sizing material injection head (48) closing are managed, low-density sizing material loading hopper (41) plus low-density stock rubber grain are passed through Expect to be plasticized injection barrel (43) into low-density sizing material, low-density sizing material is plasticized injection screw (431) rotation, low while rotation Density sizing material plasticizing injection screw (431) pushes against low-density sizing material injection ram (421) and persistently moves back, and the sizing material after plasticizing is low It is kept in density sizing material plasticizing material chamber (45)；

Step 6: die sinking: starting die cylinder (31) moves up, and opens the tray body for including half of high density outer layer (61) respectively (6) upper mold half (33) and lower mold half (34), start mold core rotational fuel tank (39), mold core conversion support (37) will be in mold Core one (35) extraction, and will be at the center between mold core two (36) insertion upper mold half (33) and lower mold half (34)；

Step 7: pre-buried spring: spring is embedded in the tray body (6) of half of high density outer layer (61) of lower mold half (34) It is interior；

Step 8: molding: starting die cylinder (31) moves down, and upper mold half (33) is closed up with lower mold half (34), will be in mold Core two (36) indwelling；

Step 9: injection: mold core conversion support (37) decline reserves the injection position of low-density sizing material injection head (48)；Start low Density sizing material injection seat Shift cylinder (49), by the upper mold half (43) after low-density sizing material injection head (48) insertion molding under In half mold (44), start low-density sizing material injection cylinder (42), low-density sizing material injection ram (421) Forward, by low-density In low-density stock rubber injection mold in sizing material pre-firing material-holding chamber (45)；Low-density sizing material injection head (48) is closed；Starting Low-density sizing material injection head (48) is exited mold by low-density sizing material injection seat Shift cylinder (49)；

Step 10: mold core conversion support (37) rises to original position, start mold core rotational fuel tank (39), mold core conversion support (37) will Mold core two (36) extraction；

Step 11: molding again: starting die cylinder (31) moves down, and will include the upper mold section of half of tray body (6) respectively Tool (33) closes up again with lower mold half (34), the hollow form after removing inside tray body (6) in mold core two (36)；

Step 12: high-pressure aerated: starting hydraulic station (86), high pressure oil enter cylinder block (84) cavity of resorption by high-pressure oil pipe, Oil cylinder piston (841) are pushed to move up, oil cylinder piston (841) drives cylinder piston (811) to move up together, and cylinder piston (811) will The pressure high temperature hot gas of cylinder (81) epicoele squeezes into upper mold half (33) and lower mold half (36) inner cavity by air tube；

Step 13: foaming and vulcanization: the tray body (6) of upper mold half (33) and lower mold half (34) inner cavity is heated up and is added Pressure adjusts die cylinder (31) back pressure, so that die cylinder (31) is switched to floating position, foaming agent reduces foaming, and keeps rubber swollen Bulging is at spongy state, then carries out pressure maintaining, heat preservation, protects the time, reaches cures requirements；

Step 14: pressure release: by internal high temperature and high pressure gas pressure release；

Step 15: die sinking: starting die cylinder (31) moves up, and opens upper mold half (33) and lower mold half (34), takes out support Disk ontology (6).