A shut-off valve for BMC injection molding machines.

Abstract

The invention relates to a shut-off valve (1) for transferring and controlling the flow of BMC paste from an injection molding machine. The shut-off valve (1) comprises a feed body (10) with a BMC paste inlet (11), a flow guide body (20) with a paste advancement channel (23), a nozzle assembly (30) with an injection channel (35), a movable cutting element (40) within the injection channel (35), and a movement mechanism (50) that moves the cutting element (40). The nozzle assembly (30) comprises a separably connected nozzle connection body (31), an intermediate nozzle body (32), and a final nozzle body (33). The cutting opening (39) in the final nozzle body (33) includes a cutting opening with a constant inner cross-section, and the cutting end region (41) of the cutting element (40), with a constant outer cross-section compatible with the aforementioned cutting opening, advances into the cutting opening to cut the BMC paste.In the possible configuration, the cooling body (34) limits the premature hardening of the BMC paste within the nozzle group (30).

Description

1 TARIFF A shut-off valve for BMC injection molding machines. TECHNICAL AREA 5 The invention relates to the flow of BMC paste during its transfer to the mold in BMC injection applications. It involves a shut-off valve for control purposes. PREVIOUS TECHNIQUE 10 In the shaping of BMC-based thermoset composite materials, material injection is used. The material is conveyed under pressure through the unit to the mold and exposed to heat inside the mold. It is allowed to harden by being left in place. Unlike thermoplastic injection applications, this These types of materials are kept at a low temperature during injection molding, and the final shape and mechanical properties are 15. These properties are obtained as a result of the reaction that takes place inside the hot mold. During the injection process, the tip of the injection nozzle must be sealed to ensure a leak-proof seal. The BMC compound is transferred to the mold by contacting the injection nozzle of the mold. Due to the high temperature of the mold, there is a risk of mold damage in the contact area. Heat transfer occurs towards the injection nozzle, and the temperature of the injection nozzle is 20. This heat increases over time. Therefore, the heat between the injection nozzle and the mold... limiting the passage, premature hardening of the material within the injection channels prevention and control of material flow at the nozzle outlet after injection It is important. The shut-off valves used in current applications are mostly made of thermoplastic materials. It has been developed according to its processing and allows the passage of heated and fluid plastic material. It has needle and seating surface structures designed for cutting. However, it also has fiber and BMC pulp, containing resin, is known for its high viscosity, abrasive structure, and fibrous content. In valve systems, the subject is not easily crushed or damaged by contact surfaces. It does not move away. The material gets stuck between the valve surfaces, affecting the moving elements. This can hinder its progress, cause bending and wear on the shaft or needle, and This can prevent the nozzle from closing completely. Also, the injection... pressurized material remaining at the nozzle tip during removal of the group from the hot mold It can leak out, causing burrs and material loss. Long-term 35 In production, the heat transferred from the mold to the injection nozzle circulates through the BMC paste inside the nozzle. reacting to cause hardening, narrowing of flow channels, or complete collapse. 2 This can cause clogging. The existing shut-off valves are cool, high power. working under the test of abrasive composite material resistance and cutting of fibrous pulp. Its inadequacy in terms of separation, uninterrupted and controlled in BMC injection lines This makes production more difficult. In conclusion, all the problems mentioned above necessitate an innovation in the relevant technical field. It has made it mandatory. A BRIEF DESCRIPTION OF THE INVENTION The present invention aims to eliminate the aforementioned disadvantages and contribute to the relevant technical field. It is related to a shut-off valve, designed to bring new advantages. One purpose of the invention is to enable the injection of BMC paste containing fiber and resin through a nozzle after injection. The flow is controlled by cutting it off at the outlet and the injection group is removed from the mold 15 A shut-off valve is introduced that prevents material leakage during separation. to place. Another purpose of the invention is to transfer the heat from the hot mold to the injection nozzle. limiting and preventing premature hardening of BMC paste inside the nozzle 20 The goal is to introduce a shut-off valve that provides this. All the purposes mentioned above and those that will emerge from the detailed explanation below. The present invention aims to achieve this by exposing BMC dough from an injection molding machine. For transferring the BMC paste to the mold and controlling the flow of the BMC paste, the 25-degree path along which the BMC paste progresses. A nozzle assembly having at least one injection channel, open within the injection channel. a cutting element that is positioned movably between the closed and closed positions and a movement that moves the cutting element between the open and closed positions It relates to a shut-off valve that includes a mechanism. Accordingly, the innovation is in BMC dough. A feed body with a BMC dough inlet that allows it to be taken to the shut-off valve 30 It must contain at least one dough ball that is in contact with the feed body and through which the BMC dough ball moves. It includes a flow guiding body with a progression channel, the nozzle assembly, the flow A nozzle connection body that is detachably connected to the guiding body, nozzle connection positioned between the nozzle body and the nozzle connection body. a detachably connected intermediate nozzle body and a detachably connected intermediate nozzle body 35 The aforementioned nozzle is connected and structured to make contact with the injection nozzle of the mold. It includes the nozzle body, and the cutting edge of the nozzle body, at the point where it contacts the mold. 3 a shear opening that extends with a constant internal cross-section in the direction of movement of the element (40) It has a cutting edge and the cutting element has a cross-section of the mentioned cutting opening. conformable, having a constant external cross-section along the direction of movement and towards the closed position. a cutting insert that cuts the BMC paste by advancing into the cutting opening during its movement It includes a region. Thus, the BMC dough is transferred from the feeding body to the nozzle group in 5 uninterrupted transfer of fiber-containing pulp at a constant cross-section shear opening. by cutting off the flow and preventing material loss due to overflow at the nozzle outlet The limitation is ensured. A feature of a possible configuration of the invention is that the flow guiding body, feed 10 a primary flow body connected to the main body and a secondary flow body connected to the nozzle assembly including and along the first flow body and second flow body of the dough advancement channel It is the extension of the BMC dough from the feed body to the nozzle assembly. It is ensured that the transmission occurs via an uninterrupted flow path. A characteristic feature of a possible configuration of the invention is that the first flow body and the second flow body They are interconnected in a way that allows them to be separated. Thus, access to the dough advancement channel is possible. Cleaning, maintenance, and independent repair of worn or damaged flow bodies are facilitated. The change is ensured accordingly. A characteristic feature of a possible configuration of the invention is that at least one nozzle is located in the nozzle group. cooling housing, at least one cooling channel created in the cooling housing, cooling a coolant inlet that allows the coolant to be drawn into the cooling channel and cooling It includes a coolant outlet that allows the coolant to be removed from the cooling channel. Thus, by limiting the heat transferred from the hot mold to the nozzle group, the BMC dough is reduced to 25. premature hardening within the injection channel, narrowing or blockage of the channel is being reduced. A feature of a possible configuration of the invention is that the cooling housing is the cutting element. positioned to surround and the injection channel, the outer 30 of the cutting element It is formed between the surface and the inner surface of the cooling housing. Thus, BMC by directly enclosing the flow zone where the dough moves around the cutting element Effective cooling is ensured. A feature of a possible configuration of the invention is that the cooling channel is 35 inches from the injection channel. It is the circumferential extension of the cooling housing within the enclosure, surrounding it. Thus, 4 The nozzle assembly is molded by circulating the coolant around the injection channel. Heat transfer in the immediate vicinity is limited. A feature of a possible configuration of the invention is that the cooling housing can be separated into nozzle groups. The reason is that they are connected in this way. Thus, the material hardens within the nozzle group. Cleaning the cooling housing simplifies maintenance and replacement procedures. A feature of a possible configuration of the invention is the open and closed positions of the cutting element. at least one that ensures the maintenance of the direction of motion during movement between them It includes a guide element. Thus, the position of the cutting element relative to the axis of movement is 10 protected cutting edge area meeting the cutting edge in a compatible manner is provided. A feature of a possible design of the invention is the pressure of the BMC paste on the cutting element. The injection channel 15 of BMC dough, which limits its bending underneath, at least one support element having at least one flow opening that allows passage through it This includes preventing the cutting element from bending under high BMC paste pressure or The BMC paste moves along the injection channel while its bending is limited. It is being continued. A feature of a possible design of the invention is that the cutting opening located at the cutting edge, It is a cylindrical hole with a constant inner diameter. Thus, BMC pulp can be inclined or conical. jamming along a seating surface and accumulating on the inner surfaces of the cutting opening The risk of the element not progressing to the closed position is reduced. A feature of a possible design of the invention is that the cutting element is abrasive to the BMC paste. made of a steel material that has been hardened to provide resistance to its effects This is because the abrasive fiber content of the cutting element and the processes that occur during cutting... By increasing its resistance to incoming mechanical loads, it can perform the cutting function throughout its service life. This is ensured. 30 A characteristic feature of a possible design of the invention is the mechanism of motion, the driving force. a drive unit that generates motion, and a cutting element that transmits the motion generated by the drive unit to the cutting element. at least one transmission element and at least one element providing contact between the transmission element and the cutting element. It includes a connecting element. Thus, the driving force created in the drive unit is transferred to the cutting unit. 35 mechanical transmission to the element and the open and closed positions of the cutting element It ensures reliable movement between them. A characteristic feature of a possible configuration of the invention is that the drive unit is a piston and the transmission is... Its component is a drive arm that transmits the piston's movement to the cutting element. Thus, the necessary kinetic force to counteract the high BMC paste pressure inside the injection channel While this is achieved, the direction of the drive movement is changed, thus limiting the movement mechanism. It is possible to place it in the assembly area. 5 A feature of a possible design of the invention is that the cutting edge area, the cutting opening, is fixed. It has a cylindrical form with a constant outer diameter that matches its inner diameter. Thus, the cutting edge BMC fiber-containing material progresses linearly through the cutting opening of the region. cutting the dough and closing the part of the injection channel that opens into the mold 10 is provided. A feature of a possible design of the invention is that the end of the nozzle body faces the mold. in this section, a shear extends rotationally symmetrically around the longitudinal axis of the cutting element. including the cutting edge and the cutting edge mentioned, from its outer circumference to its center, 15 a surface section with a first radius that narrows inwards towards the opening, first A radius transition surface having the opposite direction of curvature with respect to the radius surface section, inward. a surface section with a second radius tapering towards the cutting opening, obliquely tapering towards the cutting opening a linear surface section, with a radius following the aforementioned inclined linear surface section a transition section and adjacent to the cutting opening, and essentially 20 degrees to the longitudinal axis of the cutting element. It contains a vertically extending ring-shaped inner surface section. Thus, the cutting edge of the mold contact with the corresponding surface at the injection nozzle and the center of the BMC pulp The cutting tool is guided in a controlled manner to the cutting opening. The invention also describes at least one 25-inch mold that enables the conveying of BMC paste under pressure into a mold. It relates to a BMC injection molding machine that includes an injection unit. Accordingly, its innovation is... at least one of the points located between the injection unit and the mold, through which the BMC compound moves. a nozzle assembly with an injection channel, with the injection channel in the open position a cutting element positioned movably between the closed and closed positions and the cutting element a 30 that includes a movement mechanism that moves between the open and closed positions. The inclusion of a shut-off valve, the cutting element in the part of the nozzle assembly that contacts the mold. a cutting opening with a constant internal cross-section in the direction of movement It must include and the cutting element must move in a way that is compatible with the cross-section of the mentioned cutting opening. having a constant external cross-section along its direction and during its movement towards the closed position It includes a cutting edge that advances into the cutting opening and cuts the BMC paste. 35 Thus, the transfer of BMC dough to the mold is carried out in a controlled manner, and the injection process... 6 When the process is complete, the dough is cut to stop the flow, and the nozzle assembly is removed from the mold. The uncontrolled release of dough during separation is limited. BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows the isometric view of the shut-off valve, which is the subject of this invention. Figure 2 shows an isometric cross-sectional view of the shut-off valve, which is the subject of this invention. Figure 3 shows a side view of the shut-off valve, which is the subject of this invention. 10 Figure 4 shows a cross-sectional view of the nozzle assembly in the shut-off valve that is the subject of this invention. It has been given. Figure 5 shows a top section view of the shut-off valve, which is the subject of the invention. 15 Figure 6 shows a detailed view of area A, as shown in Figure 5. DETAILED DESCRIPTION OF THE INVENTION This detailed explanation describes the subject of the invention, aiming to provide a better understanding of the subject and avoiding any unnecessary complications. This is explained through examples of structures that will not create a limiting effect. Figure 1 shows an isometric view of the shut-off valve (1) which is the subject of the invention. Shut-off valve (1) is a 25 valve that enables the BMC dough to be conveyed into a mold under pressure. It is used in a BMC injection molding machine that includes an injection unit. Shut-off valve. (1) is positioned between the injection unit and the mold and BMC dough is poured into the mold. BMC dough ensures control of the dough flow during transfer. resin and fiber, fed into the mold at low temperature and pressure. BMC is a thermoset composite material. BMC paste is exposed to heat in a hot mold for 30 minutes. When left in the mold, it reacts and hardens. The shut-off valve (1) prevents the BMC dough from hardening. The dough is cut after the injection process with the open position that allows transmission. It operates between the closed position where the flow is stopped. The shut-off valve (1) directs the BMC dough from the injection machine to the mold 35 a feed body (10), a flow guiding body (20) and a nozzle for directing the flow. It includes a group (30). The shut-off valve (1) also includes a cutter that cuts off the flow of BMC pulp. 7 between the open position and the closed position of the cutting element (40) and the mentioned cutting element (40). It includes a motion mechanism (50) that moves. Figure 2 shows an isometric cross-sectional view of the shut-off valve, which is the subject of this invention. Supply body (10), part of the injection machine that conveys BMC dough under pressure 5 It is connected to the shut-off valve of the BMC dough on the feed body (10). There is at least one BMC dough inlet (11) that enables the taking of (1). BMC dough inlet (11), inside the feeding body (10) of the BMC dough coming from the injection machine. It is a channel structure that will convey the BMC dough to the part. The BMC dough inlet (11) is essentially cylindrical. inside the feed body (10) in the shape, the longitudinal axis of the feed body (10) 10 It is a channel structure that extends in the direction of the supply body (10), shut-off valve (1) It may also include the mounting points that allow it to be attached to the injection molding machine. Figure 5 shows a top-sectional view of the shut-off valve, which is the subject of this invention. Feeding flow guiding body (20) between body (10) and nozzle group (30) 15 It is positioned. The flow guide body (20) is taken from the BMC pulp inlet (11). BMC directs the dough towards the nozzle group (30). Flow guiding body (20) contains at least one dough feed channel (23). Dough feed channel (23), BMC Considering the fibrous and high-viscosity structure of the dough, the dough is placed inside the body. It is constructed in a way that will allow for its advancement, in terms of cross-section and orientation. 20 In a possible configuration, the flow guiding body (20), a first flow body (21) and a The second flow body (22) includes the first flow body (21), feed body (10) is connected and the second flow of BMC pulp taken from the BMC pulp inlet (11) It ensures that the second flow body (22) is transmitted to the first flow body (21). It is located between nozzle group (30) and BMC dough to nozzle group (30) It directs. As seen in Figure 5, the first stream body (21) and the second stream each of its bodies (22) is located on opposite sides of the movement mechanism (50) It contains dough feed channels (23). Dough feed channels (23) contain feeding channels. It extends inclined from the body (10) towards the nozzle group (30) and 30 opposite each other Their arrangement creates a V-shaped flow pattern. Thus, movement mechanism (50), flow direction of BMC dough without interruption of flow path It can be positioned in the middle region of the body (20) and the BMC dough nozzle group (30) It can be transmitted through two flow paths. 35 Dough advancement channel (23), along the first flow body (21) and the second flow body (22). It extends in such a way as to form a continuous flow path. The first flow body (21) and the second 8 The flow body (22) can be separated from each other for maintenance, cleaning or part replacement purposes. They can be connected in several ways. The mentioned connection methods are bolted connection, threaded connection, flanged connection. This can be achieved through a connection or similar detachable connection configuration. In this way... Access to the interior of the flow guiding body (20) and the dough advancement channel (23) This facilitates cleaning the BMC paste that accumulates in the channel, and worn or damaged parts can be removed. Damaged flow bodies can be replaced independently. Figure 4 shows a cross-sectional view of the nozzle assembly in the shut-off valve that is the subject of this invention. The nozzle assembly (30) is given from the flow guiding body (20), in other words the second Transfer of BMC dough from the flow body (22) to the injection nozzle of the mold 10 It provides. Nozzle assembly (30), a nozzle connection body (31), an intermediate nozzle body (32) and includes an end nozzle body (33). The mentioned bodies are the nozzle group (30) disassembly, cleaning, maintenance, and separate disposal of worn parts. They are interconnected in a way that allows them to be separated from each other. Nozzle connection body (31) to the flow guide body (20) of the nozzle assembly (30) It forms the connecting part. Nozzle connection body (31), flow direction The body (20) is essentially connected to the second flow body (22) in a separable manner and Taking BMC dough from the dough advancement channel (23) to the nozzle group (30) It provides. Preferably this connection is a threaded connection. The nozzle connection body (31) flow 20 inlet area facing the guiding body (20), dough advancement channel (23) and fluid It is structured to establish contact. In other words, the nozzle connection body (31), and other nozzle bodies, the intermediate nozzle body (32) and the end nozzle body (33), are connected to each other. Coaxially positioned and hollow inside which the injection channel (35) extends. They are cylindrical body parts. 25 Intermediate nozzle body (32) is between the nozzle connection body (31) and the end nozzle body (33). It is positioned. The intermediate nozzle body (32) is connected to the nozzle connection body (31) on one side. and on the other hand, it is connected to the end nozzle body (33) in a detachable manner. Possible In a configuration, at least one of the connection areas of the intermediate nozzle body (32) is threaded 30 It is formed. However, the intermediate nozzle body (32) has different detachable connections. They can also be connected to neighboring trunks through their shapes. The end nozzle body (33) forms the last part of the nozzle group (30) facing the mold. The end nozzle body (33) is connected to the intermediate nozzle body (32) in a detachable manner and 35 The nozzle contacts the injection opening of the mold during the injection process. the contact surface of the body (33) facing the mold, in other words the cutting edge (39) of the mold 9 It is shaped to match the geometry of the injection port. In other words... cutting edge (39), from the outer circumference to the cutting opening in the center, respectively inwards a surface section with a narrowing first radius, inverse curvature with respect to a surface section with a first radius a transition surface with a radius having a direction, a second surface section with a radius that tapers inwards, An oblique linear surface section that narrows towards the cutting opening, oblique linear surface 5 a radius transition section following the section and adjacent to the cutting opening and cutter an inner surface section in the shape of a ring that extends essentially perpendicular to the longitudinal axis of the element (40) It includes. Thus, for directing the BMC dough from the nozzle group (30) into the mold. A transitional zone is created where the two zones meet. Nozzle group (30) is where the BMC dough moves from the flow guiding body (20) into the mold. It contains a small injection channel (35). The injection channel (35) is the nozzle connection body. (31) extends towards the mold along the intermediate nozzle body (32) and the end nozzle body (33). The dough advancement channel (23) and the injection channel (35) are in fluid contact with each other, BMC dough taken into the feed body (10) is continuously fed to the nozzle group (30) and 15 This allows it to progress into the mold from here. The cutting element (40) extends along the nozzle assembly (30) and the injection channel (35) It moves linearly between the open and closed positions inside. (Cutter) element (40), in possible configuration in the form of longitudinal shaft, pin, needle or punch 20 It can be formed. During the injection of BMC dough, the cutting element (40) is open. It is located in this position. In this position, the cutting element (40) is injected into the BMC dough. It allows the material to advance into the mold by passing through the channel (35). At least one section of the injection channel (35) must be between the outer surface of the cutting element (40) and the cutting 25 a flow gap created between the inner surface of the body surrounding the element (40) It is in the form of BMC paste flowing through this gap around the cutting element (40). It progresses and reaches the end nozzle body (33). The cross-section of the injection channel (35) shows the fiber and will not obstruct the passage of BMC paste containing resin and the paste under high pressure It is determined in a way that will allow it to be transferred to the mold. 30 The cutting element (40) has a cutting edge area (41) at the end facing the mold. The cutting edge area (41) is in the same direction of movement and coaxial with the cutting element (40). It extends in this way and has a constant external cross-section along the direction of movement. The cutter The fixed outer section of the end region (41) and the fixed inner section of the cutting opening (39) It is determined in such a way as to be compatible with the cross-section. Thus, the cutting edge region (41) is determined to be compatible with the cutting edge. the shear gap during the movement of the element (40) between the open and closed positions It can enter the opening and move linearly according to the cutting width. A cutting edge (39) on the part of the end nozzle body (33) that contacts the mold The cutting edge (39) is located on the corresponding surface in the injection opening of the mold. It is shaped to make contact along the contact surface. This contact is ensured. For the purpose of cutting the nozzle (39), the end nozzle body (33) which is essentially cylindrical in form, faces the mold. at the tip, it will have a surface profile different from the aforementioned cylindrical form. It is formed. The cutting edge (39) rotates around the longitudinal axis of the cutting element (40). It extends symmetrically and increases in length from the outer perimeter towards the central cutting opening. radial surface sections extending inwards, an inclined surface section tapering inwards, and a shear. It essentially contains a vertical inner surface section adjacent to its opening. The aforementioned cutting edge (39), also the end nozzle body (33) which contacts the injection mouth of the mold It forms part of the cutting edge (39) in the direction of movement of the cutting element (40). It includes a shear opening that extends with a constant cross-section. In a possible configuration, 15 The mentioned cutting opening is a cylindrical opening with a constant inner diameter through which the cutting element (40) passes. It is a hole. Therefore, on the inner surface of the cutting opening, it narrows towards the cutting element (40). There is no flared or conical seating surface. When the cutting element (40) moves from the open position to the closed position, the cutting edge area (41) becomes 20 It moves into the cutting opening located in the cutting edge (39). The cutting edge area (41) thanks to having a constant outer cross-section compatible with the inner cross-section of the cutting opening, the cutting edge The region (41) and the cutting opening form a cutting pair that works together. The cutting edge During the advancement of the region (41) into the cutting opening, BMC was among them The pulp is cut and the fibers within the BMC pulp are separated. Thus, 25 BMC dough is compressed and crushed between conical or countersunk surfaces instead of being cut by a cutting tool. The region is cut by advancing into the cutting opening (41), the inclined surfaces of the fibers the jamming between them is reduced and the cutting element (40) moves to the closed position. is facilitated. The cutting element (40) is injected into the channel after the cutting process. (35) closes the part that opens into the mold. 30 The material of the cutting element (40) is the abrasive fibers found in the BMC pulp. to withstand the impact and mechanical loads occurring during the cutting process is selected. In a possible configuration, the cutting element (40) is a heat-treated hardened one. It is manufactured from steel material. The hardened structure of the cutting edge area (41), cutting 35 to maintain the external cross-sectional geometry of the end region (41) throughout the service period and BMC It allows for the repeated cutting of the fibers in the dough. 11 The shut-off valve (1) controls the movement of the shut-off element (40) between the open and closed positions. It includes at least one guide element (42) guiding the cutter. The guide element (42) is the cutter. the element (40) maintains its position relative to the axis of movement and the cutting edge area (41) It ensures that the cutting edge (39) meets in a compatible manner. The guide element (42), bearing, bushing or similar guiding structure surrounding the cutting element (40) 5 It can be created in this way. The cutting element (40) extends along the nozzle assembly (30) and is high during injection. Due to being exposed to the effect of pressurized BMC dough, the shut-off valve (1) has at least one It may include a support element (43). The support element (43) is 10 inches around the cutting element (40). positioned and supporting the cutting element (40) according to the direction of movement It limits the bending or twisting of the cutter under the influence of pressure. Thus, the cutter... The deviation of the element (40) from the axis of movement is reduced, and the cutting edge region (41) is reduced. progress in line with the mouth (39) and reliable cutting of BMC dough is provided. 15 Support element (43) facilitates the passage of BMC dough through the injection channel (35). It includes at least one flow opening to avoid obstruction. Support in a possible configuration. element (43), cutting element (40) holding in certain areas and between them BMC dough It has a segmented structure with openings through which it can pass. In this way, the cutting element (40) 20 The progress of BMC dough through the nozzle group (30) while being mechanically supported It is being continued. The shut-off valve (1) nozzle assembly (30), in a possible configuration at least one cooling shell (34) includes. The cooling body (34) is at least 25 inches from the nozzle group (30) which is closest to the hot mold. It is located in a small part and surrounds the cutting element (40). Cooling The body (34) can be separated into adjacent bodies of the nozzle group (30). It can be connected. Thus, the material hardens inside the nozzle group (30). cleaning or maintenance and replacement of the cooling housing (34) This makes implementation easier. In the preferred configuration, 30 are shown in Figures 2 and 4. As can be seen, the cooling housing (34), the intermediate nozzle housing (32) and the end nozzle housing (33) are positioned to lie on the inside. At least one section of the injection channel (35) must be between the outer surface of the cutting element (40) and the cooling channel. It is formed between the inner surfaces of the body (34). In this structure, BMC dough, cutter 35 It runs around the element (40) and along the inner surface of the cooling shell (34). 12 The distance between the inner diameter of the cooling body (34) and the outer diameter of the cutting element (40) is BMC It is designed to allow the dough to pass through under injection pressure. The cooling housing (34) is a structure in which at least one cooling channel (36) is formed. It has a cooling channel (36) that surrounds the injection channel (35) cooling 5 It can extend circumferentially within its trunk (34). In line with this structure hollow surrounding the cooling housing (34), cutting element (40) and injection channel (35) It has a cylindrical form. In the preferred configuration, the cooling duct (36) is cooling The body (34) extends helically around its longitudinal axis. The cooling channel (36) extending around the injection channel (35), coolant nozzle assembly 10 It allows the material to be moved around the area closest to the mold. On the cooling housing (34), the coolant is taken into the cooling channel (36). with at least one coolant inlet (37) providing coolant through the cooling channel (36) There is at least one coolant outlet (38) that allows its removal. The coolant, 15 The coolant is taken from the coolant inlet (37) to the cooling channel (36), and into the injection channel (35) It is circulated around and removed from the coolant outlet (38). During the injection process, the end nozzle body (33) contacts the injection mouth of the hot mold. Due to the aforementioned contact, the mold to the nozzle body (33) and nozzle 20 Heat transfer occurs to other parts of the group (30). In other words, As a result of the contact of the end nozzle body (33) with the hot mold, the mold and nozzle assembly (30) A thermal bridge is formed between them. Coolant inside the cooling shell (34) circulation, heat transferred from the mold to the nozzle group (30) in the injection channel (35) BMC It restricts access to the dough. 25 Thus, the BMC dough is exposed to high temperature inside the nozzle group (30) The reaction and hardening are reduced, the narrowing of the injection channel (35) or clogging is limited and the nozzle is protected during successive injection procedures. The group (30) is enabled to continue its function. 30 The cutting element (40) must be moved between the open and closed positions at least once. It is carried out by means of the movement mechanism (50). The movement mechanism (50), hydraulic, pneumatic, electric or mechanical that can give linear motion to the cutting element (40). It can include a drive structure. Thus, the movement mechanism (50) has a certain 35 It does not need to be limited by the type of drive or the layout. 13 In the preferred configuration, the movement mechanism (50) consists of a drive unit (51), a transmission unit (51). It includes element (52) and at least one connecting element (53). The drive unit (51), cutter It generates the force required to move the element (40). It is possible to In the configuration, the drive unit (51) is a hydraulic or pneumatic piston that produces linear motion. It is structured as follows: 5 The transmission element (52) transmits the motion generated by the drive unit (51) to the cutting element (40). It transmits. In the preferred configuration, the transmission element (52) is the linear of the piston. It is in the form of a drive lever or crank that transmits its motion to the cutting element (40). Transmission element (52), 10 in the limited mounting space on the injection machine of the shut-off valve (1). the direction of the drive movement in such a way as to allow it to be positioned It can be changed. The connecting element (53) is a mechanical connection between the transmission element (52) and the cutting element (40). The connecting element (53) ensures that the movement transmitted from the transmission element (52) is cut by the cutting element 15 transfer to the element (40) and between the open and closed positions of the cutting element It enables movement. In possible configurations, the connecting element (53) is pinned. a connection, articulated connection, threaded connection or similar power transmission connection It may include. The structure of the movement mechanism (50) including the piston and drive rod, injection channel (35) movement of the cutting element (40) against the high BMC dough pressure inside. It provides the necessary force for its implementation. In light of all that has been said, the shut-off valve (1) performs its function as follows: 25 Initially, the end nozzle body (33) is brought into contact with the injection opening of the mold. Movement The mechanism (50) brings the cutting element (40) to the open position. In the open position, the cutter element (40) is retracted towards the inside of the nozzle group (30) and the cutting edge area (41) It is located outside the cutting opening. Compared to the closed position shown in the figures. The cutting element (40) is moved to the right, so that the cutting edge (41) is 30 inches from the cutting edge. (39) is removed. Thus, the BMC dough is allowed to pass from the cutting opening into the mold. is provided. BMC dough, sent under pressure from the injection molding machine, exits the BMC dough inlet. (11) is taken into the feed body (10). BMC pulp is taken into the first flow body (21) and the second 35 Passing through the dough advance channel (23) that runs along the flow body (22) to the nozzle connection The dough reaches the nozzle connection body (31). The dough then passes through the nozzle connection body (31), intermediate nozzle 14 from the injection channel (35) that extends along the body (32) and end nozzle body (33) It is progressing. BMC dough passes around the cutting element (40) in the injection channel (35) and the tip through the cutting mouth (39), which is the end of the nozzle body (33), to the injection mouth of the mold 5 It is being transferred. During this time, the cutting element (40) is kept in the open position and BMC The dough's movement into the mold is not prevented. After the mold is filled with BMC dough, the movement mechanism (50), cutter The cutting element (40) moves towards the closed position. With the advancement of the cutting element (40) 10 cutting edge region with constant outer cross-section (41), cutting opening with constant inner cross-section It enters inside. During this movement, the cutting edge area (41) and the cutting opening The BMC pulp and the fibers within the pulp are cut. When the cutting process is completed, the cutting element (40) opens the injection channel (35) into the mold. It closes part of the nozzle. Thus, when the injection group is removed from the mold, the nozzle closes. The pressurized BMC paste in group (30) overflowing and spreading around the mold or the formation of burrs is limited. The cutter in the next injection process. element (40) is put back into the open position and BMC dough is allowed to pass into the mold. is given. 20 In the configuration with a cooling housing (34), the coolant is injected during the injection processes. or within the cooling channel (36) at predetermined production intervals It is circulated. Thus, the cutting edge (39) in the end nozzle body (33) is circulated with the hot mold. Heat transfer resulting from contact is limited and the BMC dough passes through nozzle 25 Its hardening is reduced within group (30). Because BMC dough has a thermoset structure. Therefore, it reacts and hardens when exposed to heat, and the nozzle group (30) It is losing its ability to flow within. The detachable body structure of the shut-off valve (1), nozzle connection body (31), intermediate 30 nozzle body (32), end nozzle body (33) and cooling body (34) as needed This allows them to be separated from each other. Thus, the injection channels (35), cutting Access to the element (40), cutting edge (39) and cooling channels (36) is possible; cleaning, Maintenance and parts replacement operations can be performed. 35 According to the structure described above, the shut-off valve (1) is the cutter of the fiber-containing BMC pulp. cutting between element (40) and cutting edge (39), injection after cutting closing of channel (35) and BMC dough uncontrollably in nozzle group (30) It ensures that its progression is limited. With a shear opening having a constant internal cross-section. cutting edge region with a constant outer cross-section compatible with the inner cross-section of the aforementioned cutting opening (41) use together, BMC dough in a flared or conical seating surface It reduces compression. In the configuration with a cooling body (34), 5 from the hot mold. By limiting the heat transferred to the nozzle group (30), the injection channel of BMC dough (35) Early erection and blockage are reduced. The scope of protection of the invention is set out in the attached claims, and this detailed description is provided below. It is not limited to the structures described for illustrative purposes. A person with technical expertise, 10 Without deviating from the main theme of the invention, different structures can be created in accordance with the frameworks described above. It is clear that it can produce applications. 16 REFERENCE NUMBERS GIVEN IN THE FIGURE 1 Shut-off Valve Feeding Body 11 BMC Dough Input 5 Flow Direction Body 21 First Flow Body 22 Second Flow Body 23 Dough Progression Channels Nozzle Group 10 31 Nozzle Connection Body 32 Intermediate Nozzle Body 33 Nozzle Body 34 Cooling Housings 35 Injection Channels 15 36 Cooling Ducts 37 Coolant Inlet 38 Coolant Outlet 39 Cutting Edges 40 Cutting Elements 20 41 Cutting Edge Area 42 Pilot Elements 43 Support Staff 50 Movement Mechanisms 51 Propulsion Units 25 52 Transfer Elements 53 Fasteners

Claims

17 REQUESTS 1. In BMC injection molding applications, the flow of BMC paste during its transfer to the mold. To check, at least one injection channel (35) through which the BMC dough is passing a nozzle group (30) with open and closed position in injection channel (35) 5 a cutting element (40) positioned movably between positions and the cutter a motion that moves element (40) between open position and closed position The feature of the shut-off valve (1) which includes the mechanism (50) is; - A BMC dough that enables the BMC dough to be taken into the closing valve (1) It includes a feed body (10) with an inlet (11), 10 - at least one dough connected to the feed body (10) and through which the BMC dough moves It includes a flow routing body (20) with a progress channel (23), - nozzle assembly (30) is detachably connected to the flow guiding body (20) a nozzle connection body (31), nozzle connection body (31) with an end nozzle located between the body (33) and the nozzle connection body (31) and can be separated 15 It can be separated by an intermediate nozzle body (32) and an intermediate nozzle body (32) connected in the figure. connected in such a way that it will come into contact with the injection nozzle of the mold. It includes the aforementioned end nozzle body (33) which is structured, - the part of the end nozzle body (33) that contacts the mold, the cutting element (40) 20 having a shear opening that extends with a constant internal cross-section in the direction of movement. it includes a cutting edge (39) and the cutting element (40) has the aforementioned cutting opening enclosed, with an external cross-section that is compatible with its internal cross-section and constant along the direction of movement. BMC moves into the cutting opening during its movement towards the position It contains a cutting edge area (41) that cuts the dough.

2. A shut-off valve (1) according to claim 1, whose characteristic is that the flow guiding body (20), a primary flow body (21) and nozzle assembly connected to the feed body (10). (30) contains a second flow body (22) connected with the dough advance channel (23) It extends along the first stream body (21) and the second stream body (22).

3. A shut-off valve (1) according to claim 2, its feature is; with the first flow body (21) The second flow body (22) is connected to each other in a separable manner.

4. A shut-off valve (1) according to claim 1, whose feature is; located in the nozzle assembly (30). at least one cooling shell (34), at least one 35 created in the cooling shell (34) Cooling channel (36), which allows coolant to be taken into the cooling channel (36). 18 a coolant inlet (37) and coolant from the cooling channel (36) It includes a coolant outlet (38) that allows its removal.

5. A shut-off valve (1) according to claim 4, whose characteristic is; cooling body (34), breaker positioning the element (40) to surround the injection channel (35), 5 between the outer surface of the cutting element (40) and the inner surface of the cooling housing (34) is the creation of.

6. A shut-off valve (1) according to claim 5, whose characteristic is; cooling channel (36), 10 inside the cooling housing (34) to surround the injection channel (35). It is its environmental reach.

7. A shut-off valve (1) according to claim 4, whose characteristic is; cooling body (34), nozzle It is connected to the group (30) in a way that can be separated.

8. A shut-off valve (1) according to claim 1, whose characteristic is that the shut-off element (40) is in the open position. maintaining the direction of movement during its movement between the closed and closed positions. It contains at least one guide element (42) which provides.

9. A shut-off valve (1) according to claim 1, its characteristic is that the cutting element (40) is BMC 20 BMC at least one flow that allows the dough to pass through the injection channel (35) It must include at least one support element (43) with an opening.

10. A shut-off valve (1) according to claim 1, whose characteristic is; 25 located at the cutting mouth (39). The cutting opening is a cylindrical hole with a constant inner diameter.

11. A shut-off valve (1) according to claim 1, its characteristic is that the cutting element (40), BMC hardened in a way that will provide resistance to the abrasive effects of the dough It is made of steel material. 30 12. A shut-off valve (1) according to claim 1, whose characteristic is; the actuator mechanism (50), a drive unit (51) that generates a driving force, the drive unit (51) a transmission element (52) that transmits the motion to the cutting element (40) and the transmission element (52) and at least one connecting element (53) providing contact between cutting element (40) 35 It includes. 19 13. A shut-off valve (1) according to claim 12, whose characteristic is that the actuator unit (51) is a piston and the transmission element (52) transmits the movement of the piston to the cutting element (40) It has a drive lever.

14. A shut-off valve (1) according to claim 10, whose characteristic is that the cutting end area (41), cutting 5 in a cylindrical form with a constant outer diameter compatible with a constant inner diameter of its opening It is the fact that.

15. A shut-off valve (1) according to claim 1, whose characteristic is that the end nozzle body (33) fits into the mold. At the end of the viewing side, rotationally symmetrical around the longitudinal axis of the cutting element (40) 10 It includes a cutting edge (39) that extends as and the said cutting edge (39) is outside narrowing inwards from the periphery towards the cutting opening in the center a surface section with radius 1, inverse curvature with respect to a surface section with radius 1 a transition surface with a radius having a direction, a second surface with a radius that tapers inwards section, an inclined linear surface section tapering towards the cutting opening, 15 a radiused transition section following the aforementioned inclined linear surface section and adjacent to the cutting opening and essentially perpendicular to the longitudinal axis of the cutting element (40). It contains an elongated, ring-shaped inner surface section.

16. At least one injection that enables the BMC dough to be conveyed into a mold under pressure. 20 It is a BMC injection molding machine that includes an injection unit; its feature is that it has an injection unit. at least one injection located between the molds, through which the BMC compound flows. a nozzle group (30) with channel (35) open inside injection channel (35) a cutting element that is positioned movably between the closed and closed positions (40) and a 25 that moves the cutting element (40) between the open and closed positions. The nozzle group includes a shut-off valve (1) with a movement mechanism (50). (30) in the direction of movement of the cutting element (40) in the part that contacts the mold. It includes a cutting edge (39) with a cutting opening that extends with a constant internal cross-section and The cutting element (40) moves in accordance with the cross-section of the mentioned cutting opening. It has a constant external cross-section along its direction and moves towards the closed position 30 a cutting insert that advances into the cutting opening during the process and cuts the BMC paste It includes the region (41).