TWM588049U - A device assembly useful for producing a molded silicone rubber product via injection molding - Google Patents

Abstract

The author of this case asked to provide at least one device assembly for producing a molded silicone product through injection molding, which can allow the use of precise dosing and mixing units, thus generating a flexible procedure to quickly dispense liquid silicone compositions ("LSR" ") To produce cured silicone products.

Description

Device assembly for producing a molded silicone product via injection molding

This creation is about a device assembly for producing a molded silicone product from a liquid silicone composition ("LSR") by injection molding.

Liquid silicone injection molding device assemblies using liquid silicone ("LSR") compositions to form molded silicone products have existed for nearly fifty years. LSR compositions that react by addition-crosslinking are well known in the silicone art.

LSR compositions are classified as heat-curable rubbers. A unique feature compared to solid silicone or elastomer is its low viscosity during processing. The two-component mixture is continuously cross-linked by an addition procedure. This means that the reaction takes place without any decomposition products being formed. This is an important benefit in the field of injection molding because there are no curing by-products and there is no need to worry about deposits forming on the mold.

As with previous rubber processing equipment, plastic processing equipment will soon be suitable for manufacturing LSR products. Injection molding of the LSR composition is usually a better choice for producers of silicone parts. This is because it provides companies with ease of handling, high volume molding, consistent part quality, and increased productivity. An LSR cylinder assembly is used to perform LSR injection molding.

Generally, one or two parts of platinum-catalyzed addition-curing reactions are used to make LSR molded rubber products, in which the first component is a mixture of a vinyl siloxane polymer, treated amorphous fumed silica, and a platinum catalyst ( Component A or Part A), and the second component is a mixture of one of the group consisting of vinylsiloxane polymer, treated amorphous fuming silica, hydrosiloxane crosslinked polymer, and curing rate inhibitor (group Point B or Part B). Since the LSR composition is shipped from the manufacturer as a two-part drum (20 or 200 liters), the removal of component A and component B materials is performed by a dosing unit designed for LSR. In these dosing units, a circular device (so-called "slave plate") having the same drum diameter is pressed into the drum to discharge the material into a supply line hose under the effect of pressure. The piston pump is installed as a delivery and dosing pump. The two components are passed through a conduit to a mixing unit in which they are brought together for the first time. Set the two pumps to run synchronously to achieve a desired 1: 1 mix ratio. The material components are run downstream through one of their static mixers for further homogeneous mixing before being delivered to the injection molding press. Dosing systems with separate small dosing units are used for additives (pigments, pigments or others).

In this step, the quantification and mixing unit are the key steps, because the precise metering for mixing parts A and B and adding additives is important and challenging. In fact, the non-ratio metering and mixing of the two separate components will result in an unbalanced ratio of the siloxane siloxane polymer to the siloxane alkenyl polymer present in the crosslinkable LSR composition prepared before injection molding . This can lead to unstable injection cure rates and cured parts with variable physical properties.

Prior to injection into a mold, the A and B mixtures were further mixed in an LSR transfer screw. Inhibitors for hydrogenated silylation vulcanization reactions are key chemicals used in LSR compositions, because if no inhibitor is used, the cross-linking reaction will begin immediately after mixing the two components even at room temperature. Therefore, the content of inhibitor is one of the key parameters required for a given processing time before the start of a given crosslinking reaction. Then, depending on the size of the part Time and temperature thermally cure the A and B mixtures. Eject the cured product from the mold and repeat the procedure.

Examples of prior art include U.S. Patent No. 3,884,866, which discloses a polymerization using two different vinylsiloxane polymers, a platinum catalyst, and a pretreated silica filler as a first component and using the same vinylsiloxane A two-part LSR procedure with a pre-treated silica filler + hydrogen-containing polysiloxane and a curing rate inhibitor as the second component. U.S. Patent No. 4,162,243 discloses a two-part LSR procedure using an in-situ treated amorphous silica filler. US Patent No. 5,977,220 discloses a two-part LSR procedure using a nitrogen organic cation salt to improve the compression set of a polysiloxane mixture. US Patent No. 6,034,199 discloses a two-part LSR procedure with an improved cure rate inhibitor. US Patent No. 6,464,923 discloses a three-part LSR procedure. The first component is a diorganopolysiloxane polymer and an inorganic filler, the second component is a liquid catalyst and a mixture of a diorganopolysiloxane polymer, and the third component is a polymer with an organic polysiloxane Mixed Hydrosilane. The patent also discloses the use of carbon black as an inorganic filler. Three separate sections result in improved storage stability compared to a two-part LSR procedure.

In summary, there are several problems with all the standard LSR procedures described above. The first problem is related to the non-ratio metering and mixing of two separate components, which can lead to an imbalance in the amount of polysiloxane crosslinker present in the finished product, leading to unstable injection cure rates and variable physics The cured part of nature. The second problem is the need for expensive equipment to pump two separate mixtures into a metering and mixing device. The third problem is the large and specific (immutable or set) amount of inhibitor present in component B required to obtain a multi-day room temperature working period. The inhibitor content will slow down the curing rate of the molded product, which will extend the working life.

In a different method, U.S. Patent No. 8,063,137 and U.S. Patent No. 8,198,357 describe a method for producing a molded silicone product using a liquid silicone (LSR) substrate that includes at least one vinyl siloxane Polymer, at least one hydride Crosslinkers and optionally at least one inhibitor for the hydrosilylation vulcanization reaction, but no catalyst is present in this substrate. Next, a single LSR substrate is supplied to a mixing device and will also include at least one liquid inhibitor for hydrogenated silylation vulcanization reaction and at least one inhibitor masterbatch for vinylsiloxane polymer and at least one The catalyst and a catalyst masterbatch, one of the at least one vinylsiloxane polymer, are supplied to a mixing device. Next, forming is performed to allow some cycle time improvement. However, there is still a need for a device assembly that allows greater flexibility and automation in performing this procedure. In addition, there is an urgent need for device assemblies that allow for minimal time and material waste, while allowing more flexible manufacturing of molded silicone products.

The purpose of this creation is to provide a device assembly for the production of a molded silicone product via injection molding, which allows the use of precise dosing and mixing units to produce flexible silicone products faster from liquid silicone (LSR). program.

Another object of this creation is to provide a device assembly that provides greater flexibility and automation in implementing the program methods described in the prior art US Patent No. 8,063,137 and US Patent No. 8,198,357.

1‧‧‧ platform

1'‧‧‧ pallet

2‧‧‧Quantitative system

3‧‧‧ the first supply container

4‧‧‧Second supply container

5‧‧‧ slave board

6‧‧‧ Vertical adjustable holding device

7‧‧‧ pump

8‧‧‧First substrate supply line hose

9‧‧‧ flow control element

10‧‧‧Second substrate supply line hose

11‧‧‧Flow control element

12‧‧‧ Supply Line

13‧‧‧Flow control element

14‧‧‧ Supply Line

15‧‧‧ flow control element

16‧‧‧Supply line hose

17‧‧‧Flow control element

18‧‧‧ mixing tank

18'‧‧‧ static mixer

19‧‧‧Drive unit

20‧‧‧Control unit

21‧‧‧Adjustment unit

22‧‧‧Sensor

23‧‧‧Sensor

24‧‧‧ Sensor

25‧‧‧Barrel

26‧‧‧Moulding machine

27‧‧‧Mould

28‧‧‧ air release valve

29‧‧‧display unit

30‧‧‧ supply container

31‧‧‧ supply container

32‧‧‧ supply container

33‧‧‧Roll-in device

34‧‧‧ Cold runner system

36‧‧‧Airline

In order to further understand the essence, purpose, and advantages of this creation, reference should be made to the following detailed description, which is interpreted in conjunction with the following drawings, where the same element symbols represent the same elements.

Figures 1 and 2 are schematic diagrams of a device assembly for producing a molded silicone product via injection molding, in which the inhibitor and catalyst masterbatch are separated from the liquid silicone substrate without a catalyst, and the inhibitor and catalyst The stream is fed into a mixing tank (18) before it is introduced into the barrel of the injection molding press, and the mixing tank (18) is preferably a static mixer (18 ').

Before further describing this creation, it should be understood that this creation is not limited to the specific embodiments of this creation that will be described below, as changes to the specific embodiments can be made within the scope of the accompanying patent application. It should also be understood that terminology employed is for the purpose of describing particular embodiments and is not intended to be limiting. Instead, the scope of this creation will be determined by the scope of the accompanying patent application.

In this specification and the scope of the accompanying patent application, unless the context clearly indicates otherwise, the singular forms "a" and "the" include plural references. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by the ordinary person of the technology to which this creation belongs.

This creation achieves these goals in particular. This creation is about a device assembly for producing a molded silicone product via injection molding, which includes: 1) a certain amount of system (2), which transports liquid and includes a platform ( 1) or a pallet (1 '); 2) a first supply container (3) and an optional second supply container (4), both of which are placed on the fixed platform (1) or the pallet ( 1 ') and respectively contain a liquid silicone substrate composition A1 and A2. The liquid silicone substrate compositions A1 and A2 do not contain a catalyst and include: at least one organic polysiloxane A, each of which contains a bond At least 2 alkenyl groups bonded to silicon atoms, at least one organic polysiloxane B, which contains at least 2 silicon-bonded hydrogen atoms per molecule B and preferably contains at least 3 silicon-bonded hydrogen atoms per molecule B ˙ at least one selects a filler C, ˙ at least one selects an inhibitor E, which is used for the hydrosilylation vulcanization reaction, and ˙ at least one selects an additive F; 3) several slave plates (5), etc. Liquid silicone substrate compositions A1 and A2 on the surface and their sizes and shapes are selected to tightly seal these supply containers (3) and (4), and the The slave plate (5) is maintained by a vertically adjustable holding device (6); 4) several pumps (7), which are connected to the slave plates (5) and operated by a control unit (20), a drive unit (20) 19) driven and optionally driven by the adjustment unit (21) to transfer the liquid silicone substrate composition A1 and optionally the silicone substrate composition A2; 5) a first substrate supply line hose (8), It is used to convey the liquid silicone substrate composition A1. The first substrate supply line hose (8) contains a flow control element (9) operated by the control unit (20); 6) a second substrate is selected. Material supply line hose (10) for conveying the liquid silicone substrate composition A2, the second substrate supply line hose (10) contains a flow control element (11) operated by the control unit (20) ); 7) A supply container (30) containing a catalyst master batch C1, the catalyst master batch C1 including at least one platinum-based catalyst D, the supply container (30) is connected to a container containing a flow control element (13) and a One of the supply lines (12) of the sensor (22) (all operated by the control unit (20)) is selected; 8) a supply container (31), which contains an inhibitor master batch E1, the inhibitor master batch E1 Included for At least one inhibitor E for silylation vulcanization reaction, the supply container (31) is connected to one containing a flow control element (15) and an optional sensor (23) (all operated by the control unit (20)) A supply line (14); 9) at least one optional supply container (32) containing at least one additive F, the supply container (32) being connected to a flow control element (17) and an optional sensor (24) ( All are operated by the control unit (20). One of the supply line hoses (16); 10) A mixing tank (18) is selected, which is preferably a static mixer (18 '), in which the liquid silicone rubber is transferred and mixed Base material A1, the catalyst master batch C1, the inhibitor master batch E1, the selection of liquid silicone substrate A2 and the selection of additives F to obtain a crosslinkable liquid silicone composition A3, the The crosslinkable liquid silicone composition A3 includes: a) at least one organic polysiloxane A, each of which contains at least 2 alkenyl groups bonded to a silicon atom, b) at least one organic polysiloxane B, each Molecule B contains at least 2 silicon-bonded hydrogen atoms and preferably each molecule B contains at least 3 silicon-bonded hydrogen atoms, c) at least one optional filler C, d) at least one platinum-based catalyst D, e) for At least one inhibitor E of the hydrosilylation vulcanization reaction, and f) at least one optional additive F; and 11) a control unit (20), which is optionally connected to a display unit (29), the control unit (20) controls The sensors (22) and (23) and the flow control elements (13) and (15) are used to adjust the platinum-based catalyst D in the crosslinkable liquid silicone composition A3 and are used for the hydrogenated silylation and sulfurization reaction. The amount of the inhibitor E is added, and the amount of the addition is preferably adjusted to obtain a molar ratio of the inhibitor E to the platinum atom of the platinum-based catalyst D for the hydrogenation silylation reaction. Than from 0.1 to 900 (0.1: 1 to 900: 1), optimally from 10 to 900 (10: 1 to 900: 1) and even better from 20 to 250 (20: Within the range of 1 to 250: 1); 12) a barrel (25), which is part of an injection molding press (26) and introduced therein:-the crosslinkable liquid from the mixing tank (18) Silicone composition A3, or-the liquid silicone base material A1, the catalyst master batch C1, the inhibitor masterbatch E1, the selected liquid silicone base material A2 and the selected additives F to obtain the crosslinkable liquid silicone rubber composition A3; and 13) a mold (27) installed in the press (26) and in which the crosslinkable liquid silicone composition A3 is transferred to preferably by a temperature ranging from 80 ° C to up to 220 ° C Temperature heating To cure to obtain a molded silicone product.

To achieve this, the applicant was able to demonstrate that the device assembly according to the present invention can now be used to more effectively implement the methods described in US Patent No. 8,063,137 and US Patent No. 8,198,357 of the prior art.

Indeed, the device assembly according to this creation uses a single container containing an LSR substrate composition that does not contain a catalyst in an efficient manner because the required catalyst needs to be added only on site and softened via a separate supply line before molding The tube (12) is added, wherein the supply line hose (12) contains a flow control element (13) and an optional sensor (22) (both are operated by the control unit (20)). This avoids problems related to pre-curing during long-term storage of the container.

Another advantage related to the use of the device assembly according to this creation is that an inhibitor masterbatch E1, a liquid silicone substrate without a catalyst, The catalyst master batch C1 and an additive F are separately supplied to a mixer, because the sensor and the flow control element are all operated by a single control unit (20), which allows complete control of the entire process.

In addition, the amount of the platinum-based catalyst D and the liquid injection molding inhibitor E added to the silicone substrate composition can now be easily adjusted by the control unit (20) connected to a display unit (29) as appropriate to thereby allow control of the Curing speed of the crosslinked liquid silicone composition. By controlling the molar ratio of the platinum atoms of the injection molding inhibitor E and the platinum-based catalyst D within one of the working ranges of injection molding, the device assembly according to the present invention provides greater flexibility. The preferred working ranges for this ratio are from 0.1 to 900 (0.1: 1 to 900: 1), from 10 to 900 (10: 1 to 900: 1), and from 20 to 250 (20: 1 to 250: 1) .

Another advantage of the device assembly according to this creation is that one of the key preset parameters of the LSR curing system can be used in an efficient way, with precise preset values, which are vinyl siloxane polymers and Ratio of hydrogenated silicone polymer. It is well known that this ratio affects the crosslink density and some key physical properties, such as the hardness of the durometer of the molded silicone. In fact, because this ratio is preset, it suppresses metering errors associated with the use of compound pumps used to transport and mix the two parts of the prior art LSR procedure.

In a preferred embodiment, the control unit (20) is connected to a display unit (29) so that the operator can see all the required information, the operator can modify the conditions of the molding machine and in particular the sensor (22) ) And (23) and flow control elements (13) and (15). Additionally or alternatively, the control unit may be adapted to monitor and identify deviations outside the predefined working range of the molar ratio of platinum atoms of the injection molding inhibitor E and the platinum-based catalyst D. The control unit may be designed to trigger an alarm / signal to alert an operator to a potential quality control problem in response to detecting this deviation. The control unit can also monitor the flow rate of the materials transported through different supply lines to maintain a predetermined minimum flow rate to ensure the best operating accuracy.

In another preferred embodiment, a second supply container (4) containing one of the liquid silicone substrates A2 is added to the device assembly to allow the use of a standard LSR mixing device configured for one of the standard two-part LSR procedures and Therefore, there is no need to set up a complex dosing system. The use of a supply container (4) allows a continuous and automated production sequence to give the flexibility to remove the empty container and replace it with a new filled container without stopping the forming sequence.

In addition, in another preferred embodiment, a pallet (1 ') is used, so that it is not necessary to transfer the container to the device assembly because it can be easily moved using a stacker or the like. For example, the pallet (1 ') on which the container is supplied can be pushed directly into the device assembly. Multiple containers can be delivered to the device assembly in a single delivery operation. In another preferred embodiment, the pallet (1 ') is compatible with the clean room and preferably consists of plastic, steel, galvanized steel or stainless steel. These materials are easy to clean and are therefore compatible with a clean room.

In another preferred embodiment, the slave plate (5) contains at least one bleed valve (28) connected to one of the pressure sensors operable by the control unit (20), since the slave plate is placed on the liquid surface Later, the container may contain air, which must be removed before starting to release material from the container, as the air contained in the liquid must not enter the production process, otherwise it will cause incorrect measurement.

In another preferred embodiment, the vertically adjustable holding device (6) is a piston, which is driven downward from the plate (5) to discharge the liquid silicone substrate composition A1 and optionally the liquid silicone substrate composition A2.

In another preferred embodiment, the sensor may be configured in the vertically adjustable holding device (6). The sensor measures the level in the container and is connected to an adjustment unit, which in turn is connected to a pump for emptying the container. A sensor measures the level in the container to control the emptying configuration through the adjustment unit to avoid residual liquid that could otherwise remain in a container to ensure complete emptying of the container.

In another preferred embodiment, the pump (7) is a bucket piston pump, a gear pump, an eccentric screw pump, a squeeze pump, a screw shaft pump or a bucket piston pump, and the pump (7) is more It is preferably a screw shaft pump. One of the significant advantages of screw shaft pumps is their constant output pressure and their constant output capacity. An accurate mixing ratio can be maintained at any point in time.

In another preferred embodiment, the pump (7) is a screw shaft pump and is connected to the slave plate (5). The slave plate (5) is vertically adjustable and rests on the surface of the respective liquid and seals the respective container. One advantage of the screw shaft pump is its constant output pressure and its constant output capacity.

In another aspect of this embodiment, the pump (7) is a squeeze pump that is pneumatically, hydraulically, or electrically driven and operated by a control unit (20).

In another preferred embodiment, the flow control elements (9), (11), (13), (15) and (17) are flow control valves.

In another preferred embodiment, the supply containers (3) and (4) are drums having a volume of up to 500 liters, and preferably a volume of up to 250 liters.

In another preferred embodiment, the supply containers (30), (31), and (32) are connected to the air line (36), and the air line (36) drives its contents into the mixing tank (18) or during mixing When the tank (18) is not present, its contents are driven into the barrel (25).

In another embodiment, the sensors (21), (22), (23), and (24) are flow sensors, which may be volume meters, flow meters, or differential pressure flow sensors. Various flow sensors are known in the art. Flow sensors are classified into volume meters (ie, volume flow meters) and flow meters. Volumemeters (i.e., volumetric flowmeters) include direct flowmeters (i.e., displacement meters) (such as oval flowmeters, swing piston flowmeters, or rotary piston flowmeters) and indirect flowmeters (such as turbine impeller flowmeters, impeller flowmeters) Meter, flow measuring vane, worm wheel flow meter, vortex flow meter or swirl flow meter). Flow meters include volume flow meters (such as differential pressure measurement programs), rotor flow meters, magnetic induction flow meters or ultrasonic flow meters, and mass flow meters (such as Coriolis mass flow meters or thermal mass flow meters). A differential pressure flow sensor measures the pressure before and after the flow control valve and derives the flow rate from the pressure difference.

In another embodiment, the mold (27) includes at least two corresponding parts that are movable between an open position and a closed position and form at least one mold cavity when the mold is in a closed position.

In another embodiment, the liquid silicone injection molding device assembly further includes a cold runner system (34) connected to one of the molds (27). The cold runner system (34) keeps the crosslinkable liquid silicone composition A3 cool until it is injected into the hot cavity of the mold (27) to thereby reduce potential waste.

In another embodiment, the inhibitor E used for the hydrosilylation sulfurization reaction is selected A group consisting of: 1-ethynyl-1-cyclohexanol, 2-methyl-3-butyn-2-ol, 3-butyn-1-ol, 3-butyne-2- Alcohol, propargyl alcohol, 2-phenyl-2-propyn-1-ol, 3,5-dimethyl-1-hexyn-3-ol, 1-ethynylcyclopentanol, 1-phenyl- 2-propynol, 3-methyl-1-pentene-4-yn-3-ol, and mixtures thereof.

Organic polysiloxanes containing at least 2 alkenyl groups bonded to silicon atoms per molecule:

The organopolysiloxane A is a liquid polydiorganosiloxane containing at least one silicon-bonded alkenyl group bonded to a silicon atom per molecule. Suitable alkenyl groups contain from 2 to 10 carbon atoms, and preferred examples are vinyl, isopropenyl, allyl and 5-hexenyl. Organic polysiloxanes A include silicon-bonded organic groups other than alkenyl groups. These silicon-bonded organic groups are usually selected from monovalent saturated hydrocarbon groups usually containing from 1 to 10 carbon atoms (which are substituted without or without interference curing groups such as halogen atoms) and usually containing from 6 A monovalent aromatic hydrocarbon group of up to 12 carbon atoms. Preferred silicon-bonded organic groups are, for example ,: alkyl groups such as methyl, ethyl, and propyl; haloalkyl groups such as 3,3,3-trifluoropropyl; and aryl groups such as phenyl.

Examples of suitable organic polysiloxanes A based on this creation are polymers of formula (1):

Among them: R and R "are independently selected from each other and are usually monovalent saturated hydrocarbon groups containing from 1 to 10 carbon atoms or usually containing from 6 to 12 carbon atoms (which have not undergone or do not interfere with the curing reaction) (Such as a halogen atom) is substituted) a monovalent aromatic hydrocarbon group. Preferred species of silicon-bonded organic groups (for example): alkyl groups such as methyl, ethyl, and propyl; haloalkyl groups such as 3,3, 3-trifluoropropyl; and aryl, such as phenyl.

R 'is an alkenyl group each containing from 2 to 14 carbon atoms, the alkenyl group is preferably selected from the group consisting of vinyl, allyl, hexenyl, decenyl and tetradecenyl, and The alkenyl group is most preferably vinyl, and R ′ is most preferably vinyl and n represents the degree of polymerization and it should be sufficient to achieve a viscosity of at least 100 mPa.s at 25 ° C. The upper limit of the degree of polymerization is not particularly limited and is usually limited only by the processability of the LSR composition of the present invention.

All viscosities considered in this specification correspond to a dynamic viscosity measurement value measured at 25 ° C using a Brookfield viscometer in a manner known per se. Regarding fluid products, the viscosity considered in this specification is the dynamic viscosity at 25 ° C, called the "Newtonian" viscosity, that is, a low shear rate gradient that is sufficient to make the measured viscosity independent of the rate gradient. The dynamic viscosity is measured in a manner known per se.

Other examples of useful organopolysiloxanes A may be concerned: Other examples of suitable organopolysiloxanes A include trimethylsiloxy-terminated dimethylsiloxane-methylvinylsiloxane copolymers, trimethylsilane Oxygen-terminated methylvinylsiloxane-methylphenylsiloxane copolymer, trimethylsiloxy-terminated dimethylsiloxane-methylvinylsiloxane-methylphenylsiloxane Oxane copolymer, dimethylvinylsiloxy terminated dimethylpolysiloxane, dimethylvinylsiloxy terminated methylvinylpolysiloxane, dimethylvinylsilane Oxygen-terminated methylvinylphenylsiloxane, dimethylvinylsiloxyoxy-terminated dimethylvinylsiloxane-methylvinylsiloxane copolymer, dimethylvinyl Silyloxy-terminated dimethylsiloxane-methylphenylsiloxane copolymer, dimethylvinylsiloxy-terminated dimethylsiloxane-diphenylsiloxane copolymer, and A mixture comprising at least one of the above-mentioned organic polysiloxanes.

In a preferred embodiment, the organopolysiloxane A is selected from the following: dimethylvinylsiloxy-terminated polydimethylsiloxane, dimethylvinylsiloxy-terminated Polymethyl-3,3,3-trifluoropropylsiloxane, dimethylvinylsiloxy terminated dimethylsiloxy Alkane-3,3,3-trifluoropropylmethylsiloxane copolymer and dimethylvinylsilaneoxy-terminated dimethylsiloxane / methylphenylsiloxane copolymer.

Organic polysiloxane B containing at least 2 silicon-bonded hydrogen atoms per molecule

The organic polysiloxane B contains at least 2 silicon-bonded hydrogen atoms, and preferably contains at least 3 silicon-bonded hydrogen atoms. This component forms a network by adding a silicon-bonded hydrogen atom of organopolysiloxane B to an alkenyl group of organopolysiloxane A in the presence of one of the catalysts mentioned below. Structure and thereby curing the composition to act as a cross-linking agent for organopolysiloxane A.

The molecular structure of the organopolysiloxane B is not particularly limited, and it may be a straight-chain, branch-chain-containing polymer, or cyclic. Although the molecular weight of this ingredient is not particularly limited, the viscosity is usually from 0.001 Pa.s to 100 Pa.s at 25 ° C to be well miscible with other ingredients.

Examples of suitable organic polysiloxanes B include, but are not limited to, trimethylsiloxy-terminated methylhydropolysiloxane, trimethylsiloxy-terminated dimethylsiloxane-methylhydrosiloxane Copolymer, Trimethylsiloxy-terminated methylhydrosilane-methylphenylsiloxane copolymer, Trimethylsiloxy-terminated dimethylsiloxane-methylhydrosilane-methyl Phenylsiloxane copolymer, dimethylhydrosiloxy-terminated dimethylpolysiloxane, dimethylhydrosiloxy-terminated methylhydropolysiloxane, dimethylhydrosilane Base-terminated dimethylsiloxane-methylhydrosiloxane copolymer, dimethylhydrosiloxy-terminated dimethylsiloxane-methylphenylsiloxane copolymer, dimethyl Hydrosilyloxy-terminated methylphenylpolysiloxane, polysiloxane resin including (H) (CH ₃ ) ₂ SiO _1/2 unit (M 'unit) and SiO _4/2 unit (Q unit) M'Q and a polysiloxane resin MM'Q including (CH ₃ ) ₃ SiO _1/2 units (M units), (CH ₃ ) ₂ HSiO _1/2 units and SiO _4/2 units.

It is used in an amount sufficient to cure the composition, preferably in an amount of from about 1.0 to about 10 silicon-bonded hydrogen atoms per alkenyl group in the alkenyl-containing organopolysiloxane A. Hydrogen-silicon bonded organic polysiloxane B.

Filler C

To achieve advanced physical properties, a reinforcing filler (such as finely dispersed silica) and other reinforcing fillers are usually treated with one or more known filler treating agents to prevent alleged "wrinkling" from occurring during processing of the curable composition. Or "wrinkle hardening" phenomenon.

Generally, fillers are surface-treated with, for example, fatty acids or fatty acid esters such as stearates or are treated with an organosilane, polydiorganosiloxane or organosilazane, hexaalkyldisilazane, or short The surface treatment of the siloxanes is to make the filler (s) hydrophobic and therefore easy to handle and obtain a homogeneous mixture with one of the other ingredients.

Colloidal silica is particularly suitable because of its relatively high surface area, which is usually at least 50 m ² per gram. Colloidal silica is available as fumed silica or it can be precipitated by one of the surface treatments. In a surface treatment method, fumed silica or precipitated silica is exposed to cyclic organic polysiloxane under heat and pressure. An additional method of treating the filler is to expose the silica to silica or silane in the presence of an amine compound.

Another method for surface treating silica fillers is to use methylsilane or silazane surface treating agents. Fume or precipitated silica fillers treated with methylsilane or silazane surface exhibit properties that produce pumpable polysiloxanes without excessively increasing the low viscosity of the uncured liquid precursor polysiloxane composition. After curing, the silazane-treated silica imparts an increased tear strength to the cured elastomer. U.S. Patent Nos. 3,365,743 and 3,847,848 disclose such methods.

A better silica filler is fumed silica formed in situ, which has between about 50 m ² / g and about 600 m ² / g as measured by the Brunauer-Emmett-Teller (BET) method. And preferably a surface area between about 100 m ² / g and about 400 m ² / g. The in-situ treated fumed silica occurs when the silanol on the surface of the fumed silica is capped with a silicon atom-containing alkyl, aryl or alkenyl side group and is combined with the polymer in a mixer. This procedure can utilize hexamethyldisilazane, tetramethyldivinyldisilazane or one of the known silanol capping agents known in the art, such as trimethylsilanol and dimethylvinylsilanol ) To process the filler.

The amount of finely dispersed silica or other reinforcing filler used in the curable LSR composition used in this creation is determined at least in part by the desired physical properties of the cured elastomer. The curable LSR composition of the present invention usually includes one reinforcing filler per 5 parts by weight to 100 parts by weight, usually from 10 parts by weight to 60 parts by weight, per 100 parts of organopolysiloxane.

Another example of a suitable filler is a hydrophobic silica aerogel, which is a nanostructured material with high specific surface area, high porosity, low density, low dielectric constant, and excellent thermal insulation properties. Silica aerogels are synthesized via supercritical drying procedures or via ambient pressure drying techniques to obtain a porous structure. It is now widely commercialized.

The hydrophobic silica aerogel is characterized by a surface area within a range from 500 m ² / g to 1500 m ² / g, and alternatively from 500 m ² / g to 1200 m ² / g, as determined by the BET method. Hydrophobic silica aerogels can be further characterized by a porosity higher than 80%, instead higher than 90%. The hydrophobic silica aerogel may have an average particle diameter measured from laser light scattering from 5 μm to 1000 μm, alternatively from 5 μm to 100 μm, alternatively from 5 μm to 25 μm. One example of a hydrophobic silica aerogel is a trimethylsilanized aerogel. The hydrophobic silica aerogel may be present in the curable liquid silicone composition in an amount of from 1% to 30% by weight relative to the total weight of the curable liquid silicone.

Platinum-based catalyst D

Examples of suitable catalysts include hydrosilylation catalysts (such as the Karstedt catalyst shown in U.S. Patent No. 3,715,334 or other platinum catalysts known in the art), and also include microencapsulated hydrosilylation catalysts (e.g., the technology Known catalysts, (As seen in US Patent No. 5,009,957). The catalyst may optionally be combined with an inert or active support. Examples of preferred catalysts that can be used include platinum-based catalysts such as chloroplatinic acid, chloroplatinic acid alcohol solutions, platinum and olefin complexes, platinum and 1,3-divinyl-1,1,3,3 -Tetramethyldisilanes complexes (known as Custer catalysts) and platinum-supported powders, etc. Platinum catalysts are fully described in the literature. In particular, special attention may be paid to the complexes of platinum and organic products described in U.S. Patent Nos. 3,159,601, 3,159,602 and 3,220,972 and European Patent EP-A-057,459, EP-188,978, and EP-A-190,530 And complexes of platinum and vinylated organopolysiloxanes as described in US Patent Nos. 3,419,593, 3,715,334, 3,377,432, 3,814,730, and 3,775,452.

Inhibitor E for hydrogenated silylation vulcanization

Inhibitors for hydrosilylation reactions are designed to slow down the curing reaction and are also known as curing rate control agents. Curing rate control agents are well known in the art and examples of such materials can be found in US patents. U.S. Patent 3,923,705 mentions the use of vinyl-containing cyclic siloxanes. U.S. Patent 3,445,420 describes the use of alkynols. U.S. Patent 3,188,299 shows the effectiveness of heterocyclic amines. US Patent 4,256,870 describes alkyl maleates for controlling curing. Alkylsiloxanes can also be used, as described in U.S. Patent 3,989,667. Polydiorganosiloxanes containing vinyl groups are also used and this technology can be found in U.S. Patents 3,498,945, 4,256,870, and 4,347,346. Preferred inhibitors of this composition are 1,3,5,7-tetramethyl-1,3,5,7-tetravinyl-cyclotetrasiloxane, 3-methyl-1-butyne-3 -Alcohol, 2-methyl-3-butyn-2-ol, 3-butyn-1-ol, 3-butyn-2-ol, propargyl alcohol, 2-phenyl-2-propyne-1 -Alcohol, 3,5-dimethyl-1-hexyn-3-ol, 1-ethynylcyclopentanol, 1-phenyl-2-propynol, 3-methyl-1-pentene-4 -Alkyn-3-ol, 1-ethynyl-1-cyclohexanol (ECH) and mixtures thereof, and most preferably 1-ethynyl-1-cyclohexanol (ECH).

Additional suitable inhibitor categories include hydrazine, triazole, phosphine, thiol, organic nitriding Compounds, alkynyl alcohols, silylated alkynyl alcohols, maleates, fumarates, ethylene or aromatic unsaturated amides, ethylene unsaturated isocyanates, olefin siloxanes, unsaturated hydrocarbon monoesters and diesters, Conjugyne, hydroperoxide, nitrile and diazacyclopropane.

In order to obtain one of the longer working time or "pot life" of the crosslinkable liquid silicone composition A3, for example, in the mixing tank 18, the inhibitor for the hydrogenated silylation vulcanization reaction is precisely adjusted through the supply line hose (12) E in order to reach the desired "application period". If present in the silicone substrate compositions A1 and A2, the concentration of the catalyst inhibitor added is kept very low and its concentration will vary widely depending on the specific inhibitor used and the nature of the organohydrogenpolysiloxane.

Additive F

Typical additives used in this creation include color masterbatches, UV light stabilizers, wetting agents, compression set additives, plasticizers, self-adhesive additives, antibacterial additives, thermal stabilizers, flame retardants, adhesion promoters, conductive Fillers, thermally conductive fillers, non-conductive fillers, lubricants, antistatic additives, low compression set additives, hardness adjustment additives, oil resistance additives, anti-crepe hardening additives, mold release additives, plasticizers, thickeners or increased consistency Additives, chain extenders, blowing agents and combinations thereof.

If the additive is not in a liquid form, it can be combined with a polysiloxane diluent such as polydimethylsiloxane and / or organopolysiloxane A such that it can be supplied through, for example, in the mixing tank 18 The wire hose (16) is directly added to the silicone substrate compositions A1 and A2 or the crosslinkable liquid silicone composition A3.

Any pigments and dyes that are suitable for polysiloxane elastomers but do not inhibit the hydrosilylation-catalyzed addition reaction can be used in this creation. In a preferred embodiment of the present invention, the pigments and dyes are used in the form of a pigment masterbatch composed of them dispersed in polydiorganosiloxane. Examples of additives include pigments such as carbon black, iron oxide, titanium dioxide, chromium oxide, bismuth vanadium oxide, and A mixture or derivative thereof. "Pigment" means a colored, black, white, or fluorescent particulate organic or inorganic solid that is generally insoluble in a carrier or matrix into which the solid is incorporated and is substantially physically and chemically unsupported by the carrier into which the solid is incorporated. Or matrix effects. It changes appearance by selective absorption and / or by light scattering. A pigment generally maintains a crystalline or granular structure throughout the coloring process. It also contains colorants such as vat dyes, reactive dyes, acid dyes, chromium dyes, disperse dyes, cationic dyes, and mixtures thereof. "Dye" simply means a colored or fluorescent organic substance that imparts color to a matrix by selectively absorbing light. Pigments and dyes are well known in the art and need not be described in detail herein.

Examples of conductive fillers include, but are not limited to, carbon (such as graphite, carbon black, vapor-grown carbon fibers, and carbon nanotubes) and conductive metals. Examples of conductive particles and particulate conductive materials that produce cured polysiloxane are powders and fine powders of gold, silver, nickel, copper, and the like, and alloys containing at least one of the foregoing metals, and by mixing a metal ( Alloys such as gold, silver, nickel, copper, and the like, and the like) are vacuum deposited or plated onto a ceramic, glass, quartz, or organic resin fine powder and the like and powders produced on the surface thereof. Examples of fillers that meet the above description are silver, silver-plated aluminum, silver-plated copper, silver-plated solids and insulating glass, silver-plated ceramics, silver-plated nickel, nickel, nickel-plated graphite, carbon, and the like.

Examples of the thermal stabilizer include iron oxide and carbon black, iron carboxylate, cerium hydrate, titanium dioxide, barium zirconate, cerium zirconium octoate, and porphyrin.

Flame retardants can include, for example, carbon black, aluminum hydroxide hydrate, magnesium hydroxide, carbamate / hydromagnesite blends, zinc borate and silicates (such as wollastonite), platinum, and platinum compounds And mixtures or derivatives thereof. Aluminum trihydrate (ATH) is a common flame retardant. It decomposes when heated above 180 ° C to 200 ° C, at which point it absorbs heat and releases water to extinguish the flame. Magnesium hydroxide (MDH) has a higher thermal stability than ATH. The endothermic (heat absorption) decomposition starts at 300 ° C and subsequently releases water which acts as a flame retardant. Calcium and magnesium ore carbon / blending hydromagnesite _{(Mg 3 Ca (CO 3)} 4 / Mg 5 (CO 3) 4 (OH) 2 .4H 2 O). Carbamagnesite and hydromagnesite are almost mixed in nature. Hydromagnesite begins to decompose between 220 ° C (open air) and 250 ° C (under the pressure of an extruder), a temperature range sufficient to make it useful as a flame retardant. Hydromagnesite releases water and absorbs heat, much like ATH and MDH. In comparison, carbasite is decomposed above 400 ° C to absorb heat but release carbon dioxide.

Examples of non-conductive fillers include quartz powder, diatomaceous earth, talc, clay, alumina, mica, calcium carbonate, magnesium carbonate, hollow glass, and especially hollow glass beads such as hollow borosilicate glass microspheres (also known as It is glass bubbles or glass micro bubbles)), glass fiber, hollow resin and electroplated powder and mixtures or derivatives thereof.

Examples of chain extenders include disiloxanes or low molecular weight polyorganosiloxanes containing two silicon-bonded hydrogen atoms at the terminal positions, such as tetramethyldihydrodisiloxane or dimethylhydrogen-terminated Polydimethylsiloxane.

Examples of adhesion promoters include zirconium chelates and silanes such as 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxy Propylmethyldimethoxysilane, 4-glycidoxybutyltrimethoxysilane, 5,6-epoxyhexyltriethoxysilane, 2- (3,4-epoxycyclohexyl) ethyl Trimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane, methacryloxymethyltrimethoxysilane, 3-methacryloxypropyltrimethyl Oxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyl-dimethylmethoxysilane, 3-methacryloxypropyl -Triethoxysilane, 3-methacryloxypropyl-methyldiethoxysilane, 3-methacryloxyisobutyl-trimethoxysilane, 3-propenyloxy Propyl-trimethoxysilane, 3-propenyloxypropyl-methyldimethoxysilane, 3-propenyloxypropyl-dimethyl-methoxysilane, and 3-propenyloxypropyl -Triethoxysilane and mixtures thereof.

Examples of suitable blowing agents include any liquid or solid that produces a gas by chemical decomposition or evaporation, as is well known to the skilled person. The blowing agent is preferably a chemical blowing agent, and the blowing agent is optimally selected from the group consisting of acid ammonium carbonate, ammonium bicarbonate, alkali metal bicarbonate, and mixtures thereof.

Examples

Example 1: An exemplary device assembly of this creation is structured as follows.

Referring to FIG. 1, a quantitative system (2) according to the present invention, which conveys LSR material and includes a platform (1) for a roller (3) containing a liquid silicone substrate composition A1, and a liquid silicone substrate composition A1 does not contain a catalyst and includes: at least one organopolysiloxane A containing at least 2 alkenyl groups bonded to a silicon atom per molecule; and at least one organopolysiloxane B containing at least two molecules per molecule B 2 silicon-bonded hydrogen atoms and preferably at least 3 silicon-bonded hydrogen atoms per molecule B; ˙ at least one selected from filler C; C at least one selected from liquid injection molding inhibitor E; and ˙ at least one selected from additive F .

A roll-in device (33) (not shown) for mobile dosing system (2), fixed platform (1) or pallet (1 ') can be provided to allow effortless discharge. A slave plate (5) is placed on the surface of the liquid silicone substrate composition A1, and its size and shape are selected according to the surface to tightly seal the supply container (3). The slave plate (5) is maintained by a vertically adjustable holding device (6) capable of moving one of the slave plates (5) up and down. The holding device (6) is preferably driven downward from the plate (5) to discharge one of the pistons of the liquid silicone substrate composition A1. The slave plate (5) can have different diameters and is suitable for emptying the supply container (3). When putting from the board (5) When placed on the supply container (3), preferably the air must be able to escape, which is ensured by an air release valve (28) which can be operated by the control unit (20).

In most cases, the supply container (3) is a drum. A static seal can be used to seal the container. An inflatable seal can be used for 20 to 200 liter drums. This can handle rollers with minor defects. The slave plate (5) can be lightweight (for example, weigh less than 15 kg, so that occupational health and safety regulations allow replacement by the operator). The material of the supply container (3) is pumped by a supply pump (7) such as a bucket piston pump, gear pump, eccentric screw pump, squeeze pump, screw shaft pump, bucket piston pump or any other pump. The pump (7) is operated by a control unit (20) and optionally a drive unit (19) operated by an adjustment unit (21). It allows the liquid silicone substrate composition A1 to be transferred to a mixing tank (18) via a supply line hose (8) containing a flow control element (9) operated by the control unit (20) (selection of this scheme) Option) (which is preferably a static mixer (18 ')) or directly transferred to the barrel (25) (which is part of an injection molding press (26) (not shown)).

A supply container (30) containing one of the catalyst master batches C1 including at least one platinum-based catalyst D is connected to a flow control element (13) and an optional sensor (22) (all operated by the control unit (20)) One supply line (12). It allows its contents to be transferred to the mixing tank (18) (the option selected by this scheme) or directly to the barrel (25) (the option is not drawn).

A supply container (31) containing at least one liquid injection molding inhibitor E, one of the inhibitor master batches E1, is connected to a flow control element (15) and an optional sensor (23) (both by the control unit (20) ) Operate one of the supply hoses (14). It allows its contents to be transferred to the mixing tank (18) (the option selected by this scheme) or directly to the barrel (25) (the option is not drawn). The mixing tank (18) is preferably a static mixing device.

An optional supply container (32) containing one of at least one additive F is attached to a container containing one A supply line (16) of a flow control element (17) and an optional sensor (24) (both operated by the control unit (20)). It allows its contents to be transferred to the mixing tank (18) (the option selected by this scheme) or directly to the barrel (25) (the option is not drawn).

A crosslinkable liquid silicone composition A3 is obtained in the mixing tank (18) (if present) and the barrel (25), which includes: a) at least one organic polysiloxane A, each of which contains a bond to silicon At least 2 alkenyl groups of the atom; b) at least an organic polysiloxane B containing at least 2 silicon-bonded hydrogen atoms per molecule B and preferably at least 3 silicon-bonded hydrogen atoms per molecule B; c) At least one selected filler C; d) at least one selected platinum-based catalyst D; e) at least one inhibitor E used for the hydrosilylation sulfurization reaction; and f) at least one selected additive F.

Optionally connected to a display unit (29) (an option selected in this diagram) a control unit (20) operates the sensors (22) and (23) and the flow control elements (13) and (15) to adjust the The amount of the platinum-based catalyst D and the liquid injection molding inhibitor E in the crosslinked liquid silicone composition A3. The amount of addition is preferably adjusted so that the molar ratio of the platinum atoms of the injection molding inhibitor E to the platinum-based catalyst D is maintained in the range of 0.1 to 900 (0.1: 1 to 900: 1) and optimally in the range of 10 to 900 (10: 1 to 900: 1).

A barrel (25), which is part of an injection molding press (26) and introduced therein:-a crosslinkable liquid silicone composition A3 from a mixing tank (18); or-a liquid silicone substrate A1, a catalyst Master batch C1, including for hydrosilylation vulcanization reaction The inhibitor masterbatch E1, the selected liquid silicone substrate A2, and the additive F are used to obtain a crosslinkable liquid silicone composition A3.

The pressure needs to be adjusted before the crosslinkable LSR composition A3 enters the injection unit. This device (not shown in the figure) allows to restrict the fluid path that can increase pressure, which allows proper injection dosing. The pressure regulator is adjustable, but is usually maintained in the range of 0.7 MPa to 3.5 MPa (100 psi to 500 psi) to prevent excessive compression of the metered injection.

To prevent premature crosslinking or curing during dosing and injection, the injection unit barrel can be water cooled. This limitation occurs due to the effect of viscous heating between the crosslinkable LSR composition A3, the screw and the barrel.

It is also possible to use a spring-loaded or non-return valve, such as a ball check valve, Floating ball.

A shut-off nozzle is preferably used, which is cooled with water to prevent premature cross-linking during injection and dosing before the cross-linkable liquid silicone composition A3 is introduced into the mold (27) and to prevent backflow during partial curing. Within the nozzle, the material is transferred around a piston that drives the shut-off needle and is reintroduced into the flow path near the nozzle tip. A cold runner system (34) can also be connected to the mold (27).

Once the mold (27) is filled with the cross-linkable LSR composition A3, the filling pressure is maintained on the material until curing occurs at a temperature ranging from 80 ° C to 220 ° C, and preferably from 160 ° C to 220 ° C. . A curing time after injection and packaging depends on the geometry of the part: the thicker the part, the longer the time, and the thinner the part, the shorter the time.

When curing is complete, the mold (27) is opened to allow the part to be demolded and the next injection is continued.

Referring to FIG. 2, a quantitative system (2) according to one of the present creations is another embodiment. The only difference from FIG. 1 is the addition of a second supply container (4) containing a liquid silicone substrate composition A2. The liquid silicone substrate composition A2 does not contain a catalyst and includes: at least one organic polysiloxane A Which contains at least 2 alkenyl groups bonded to silicon atoms per molecule; ˙ at least one organic polysiloxane B, which contains at least 2 silicon-bonded hydrogen atoms per molecule B and preferably contains at least 3 per molecule B One silicon bond hydrogen atom; ˙ at least one kind of filler C is selected; 至少 at least one kind of selection inhibitor E is used for hydrogenation silylation and sulfurization reaction; and ˙ at least one kind of additive F is selected.

This second supply container (4) can be used right after emptying the first supply container (3) to allow a continuous process to optimize the production cycle time, or it can, for example, by allowing the use of different durometer properties Two different LSR substrates (different levels of fillers and other components) are used with the first supply container (3) to allow more flexible manufacturing of different types of silicone materials.

Claims (10)

A device assembly for producing a molded silicone product via injection molding, comprising: a certain amount of system (2), which conveys liquid and includes a platform (1) or a pallet (1 '); a first A supply container (3) and a second supply container (4) are selected, and the two are placed on the fixed platform (1) or the pallet (1 ') and respectively contain a liquid silicone substrate composition A1 and A2, the liquid silicone substrate compositions A1 and A2 do not contain a catalyst, and include: at least one organic polysiloxane A, each of which contains at least 2 alkenyl groups bonded to silicon atoms, at least one organic polysilicon Oxane B, which contains at least 2 silicon-bonded hydrogen atoms per molecule B, and preferably contains at least 3 silicon-bonded hydrogen atoms per molecule B, at least one kind of filler C is selected, which is used for at least one kind of hydrogenated silanization and sulfurization Inhibitor E is selected, and at least one additive F is selected; several slave plates (5) are disposed on the surfaces of the liquid silicone substrate compositions A1 and A2, and their sizes and shapes are according to the The surface is chosen to tightly seal the supply containers (3) and (4), and the slave plates (5) are The holding device (6) is maintained; a number of pumps (7) are connected to the slave plates (5) and are operated by a control unit (20), and optionally a drive unit (21) operated by an adjustment unit (21) 19) Drive to transfer the liquid silicone substrate composition A1, and if appropriate, transfer the silicone substrate composition A2; a first substrate supply line hose (8) for conveying the liquid silicone substrate composition A1 The first substrate supply line hose (8) contains a flow control element operated by the control unit (20); an optional second substrate supply line hose (10) is used to transport the liquid silicone rubber base Material composition A2, the second substrate supply line hose (10) contains a flow control element (11) operated by the control unit (20); a supply container (30) containing at least one platinum-based catalyst A catalyst master batch C1, the supply container (30) is connected to a supply line (12), the supply line (12) contains a flow control element (13) and a A sensor (22) is selected; a supply container (31) containing an inhibitor masterbatch E1 including one of at least one inhibitor E for hydrogenated silylation vulcanization reaction The supply container (31) is connected to a supply line (14), and the supply line (14) contains a flow control element (15) and an optional sensor (23) all operated by the control unit (20); At least one optional supply container (32) contains at least one additive F, the supply container (32) is connected to a supply line hose (16), and the supply line hose (16) contains the control unit (20) ) Operate a flow control element (17) and an optional sensor (24); an optional mixing tank (18), which is preferably a static mixer (18 '), in which the liquid silicone substrate is transferred and mixed A1, the catalyst masterbatch C1, the inhibitor masterbatch E1, the liquid silicone base material A2 and the additives F selected to obtain a crosslinkable liquid silicone composition A3, the crosslinkable liquid silicone composition A3 Including: at least one organic polysiloxane A containing at least 2 alkenyl groups bonded to silicon atoms per molecule, at least organic polysiloxane B containing at least 2 silicon bonded hydrogen atoms per molecule B, and Each molecule B should preferably contain at least 3 silicon-bonded hydrogen atoms, at least one optional filler C, and at least one platinum-based catalyst D for hydrogenation At least one inhibitor E of the silylation vulcanization reaction, and at least one optional additive F; and a control unit (20), which is connected to a display unit (29) as appropriate, and the control unit (20) controls the sensing (22) and (23) and the flow control elements (13) and (15) to adjust the platinum-based catalyst D in the crosslinkable liquid silicone composition A3 and the inhibition for the hydrogenated silylation vulcanization reaction The amount of the additive E is preferably adjusted to obtain a molar ratio of one of the platinum atoms of the inhibitor E and the platinum-based catalyst D used in the hydrosilylation sulfurization reaction. 0.1 to 900 (0.1: 1 to 900: 1), optimally from 10 to 900 (10: 1 to 900: 1), and even more preferably from 20 to 250 (20: 1 to 250: 1) Inside; a barrel (25), which is part of an injection molding press (26), and introduced therein: the crosslinkable liquid silicone composition A3 from the mixing tank (18), or the liquid silicone base Material A1, the catalyst master batch C1, the inhibitor master batch E1, the liquid silicone rubber substrate A2 and the additives F selected to obtain the crosslinkable liquid silicone rubber composition A3; and (27), which is installed in the molding machine (26), and wherein the crosslinkable liquid silicone composition A3 is transferred to be preferably heated at a temperature ranging from 80 ° C to up to 220 ° C To cure to obtain a molded silicone product. If the device assembly of claim 1, wherein the mold (27) contains at least two corresponding parts, the at least two corresponding parts can be moved between an open position and a closed position, and the mold is in a closed position At least one mold cavity is formed at a time. The device assembly of claim 1, further comprising a cold runner system (34) connected to the mold (27). If the device assembly of claim 1, wherein the vertical adjustable holding devices (6) are driven down from the plate (5) to discharge the liquid silicone substrate composition A1 and discharge the liquid silicone substrate as appropriate Piston of composition A2. If the device assembly of claim 1, wherein the slave plates (5) contain at least one air release valve (28) operated by the control unit (20). The device assembly of claim 1, wherein the pump (7) is a bucket piston pump, a gear pump, an eccentric screw pump, a squeeze pump, a screw shaft pump, or a bucket piston pump. The device assembly of claim 6, wherein the pump (7) is a squeeze pump which is pneumatically, hydraulically or electrically driven and operated by a control unit (20). If the device assembly of claim 1, wherein the flow control elements (9), (11), (13), (15) and (17) are flow control valves. If the device assembly of claim 1, wherein the supply containers (30), (31) and (32) are connected to an air line (36), the air lines (36) connect the supply containers (30), The contents of (31) and (32) are driven into the mixing tank (18), or into the barrel (25) when the mixing tank (18) is not present. The device assembly of claim 1, wherein the supply containers (3) and (4) are rollers having a volume of up to 500 liters, and preferably up to a volume of 250 liters.