Composite material silicone rubber pressure forming mold and forming method

Abstract

The invention relates to the technical field of silicone rubber forming molds, in particular to a composite silicone rubber pressure forming mold and a forming method.The composite silicone rubber pressure forming mold comprises a workbench, a left side mold, a right side mold, a mold rod and a movable framework, a long shaft is slidably installed on the workbench, and the left side mold is fixedly installed on the workbench; the movable frame is slidably installed in the left side mold, the mold rod is fixedly installed on the lower end face of the movable frame, the right side mold is fixedly installed on the long shaft, an opening assembly is arranged in the mold rod, two arc plates are symmetrically installed in the mold rod, and the opening assembly pushes the arc plates to move in the horizontal direction. When the air blowing device works, the interior of the silicone rubber thumb nipple is expanded, and the situation that the demolding efficiency is affected due to the fact that the composite silicone rubber thumb nipple is difficult to demold after being machined and formed due to different shapes and sizes of thumb nipple molds is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of silicone rubber molding dies, in particular to a composite material silicone rubber pressurized molding die and a molding method. Background Art

[0002] As a childcare device used by infants and young children, pacifiers are often made of food-grade silicone because of the characteristics of silicone rubber such as colorless, odorless, non-toxic, high temperature and low temperature resistance. Silicone rubber pacifiers are more heat-resistant than ordinary plastic pacifiers, and no harmful ingredients will seep out after long-term disinfection, and no odor such as plastic will be produced. In order to adapt to babies of different ages and needs, silicone rubber pacifiers are designed into various shapes to provide a comfortable and convenient feeding experience, such as dome pacifiers, high arch pacifiers, thumb pacifiers, and flat pacifiers. The preparation of silicone rubber pacifiers is all made by mold injection molding. This process involves passing fluid silicone through the feed The silicone rubber nipple is injected into the mold, and after cooling and molding, an ejector is used to eject the molded silicone rubber nipple from the mold, or a blowing device is used to blow the silicone rubber nipple out of the mold. A nipple with a regular shape is easy to be removed from the mold after injection molding, but for a nipple with an irregular shape, such as a thumb nipple, the prior art uses a blowing method to blow the thumb nipple off the mold, but the thumb shape at the top of the thumb nipple is more protruding than the cylindrical shape at the bottom of the nipple, and the fit between the inside of the thumb nipple and the mold is large, resulting in the thumb nipple being difficult to smoothly fall off from the mold during blowing, affecting the demolding efficiency of the silicone rubber thumb nipple, and even silicone residue may remain on the mold.

[0003] In order to prevent the silicone rubber pacifier from falling off smoothly from the mold when the blowing device is working, resulting in difficulty in demolding the silicone rubber pacifier, the invention patent with application number CN202410268119.0 provides a silicone pacifier injection mold ejection mechanism. The invention cooperates with the upper ejector located in the mold shell and the lower ejector located in the mold bottom and the air outlet in the injection mold of the silicone rubber pacifier, so that the upper surface of the molded silicone rubber pacifier can be peeled off from the mold shell first, and then the waist of the pacifier is peeled off from the mold bottom by blowing through the air outlet, and the pacifier is ejected from the mold by the lower ejector. This design effectively improves the integrity and smoothness of the silicone pacifier after injection molding, but it is still difficult to achieve smooth demolding of the silicone rubber thumb pacifier by using the method of cooperating with ejection and blowing. During the ejection process, the cylindrical part of the silicone rubber thumb pacifier may be entangled with the protruding part of the mold, and the blowing of the air outlet is also difficult to blow the silicone rubber thumb pacifier off the mold, so the problem of difficulty in demolding the silicone rubber thumb pacifier still occurs.

[0004] Therefore, in order to avoid the strong adhesion between the inside of the thumb pacifier and the mold, which makes it difficult for the thumb pacifier to fall off smoothly from the mold during blowing and affects the demoulding efficiency of the silicone rubber thumb pacifier, a composite silicone rubber pressurized molding mold and molding method are proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a composite silicone rubber pressure molding mold and a molding method, in order to avoid the thumb pacifier having a large adhesion force between the inside of the thumb pacifier and the mold when demolding, which makes it difficult for the thumb pacifier to smoothly fall off the mold during blowing, affects the demolding efficiency of the silicone rubber thumb pacifier, and even has silicone residue on the mold, by arranging a stretching component inside the mold rod, the inside of the silicone rubber thumb pacifier is stretched when the blowing device is working, and the thumb pacifier mold is prevented from being different in shape and size, which makes it difficult to demold the composite silicone rubber thumb pacifier after processing and molding, affects the demolding efficiency, and facilitates smooth demolding of the silicone rubber thumb pacifier. At the same time, the silicone rubber thumb pacifier is demolded after being stretched from the inside, which reduces the adhesion force between the inside of the silicone rubber thumb pacifier and the mold rod, and avoids the problem of silicone rubber residue on the mold.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A composite material silicone rubber pressurized molding mold, comprising a workbench, a left mold, a right mold, a mold rod, a mobile frame, and a silicone rubber thumb pacifier, wherein a long shaft is slidably mounted on the workbench, the left mold is fixedly mounted on the side of the workbench, a left mold core is fixedly mounted inside the left mold, the mobile frame is configured as a rectangle and has a cavity inside, the mobile frame is slidably mounted inside the left mold, the mobile frame is located above the left mold core, the workbench drives the mobile frame to move left and right in a horizontal direction, the mold rod is fixedly mounted on the lower end surface of the mobile frame, the right mold is fixedly mounted on the long shaft A right mold core is fixedly installed inside the right mold, and a perfusion flow channel is opened in the right mold, and the perfusion flow channel is connected with the right mold core. When the left mold and the right mold are fitted together, the left mold core, the mold rod and the right mold core form a cavity, and the silicone rubber thumb pacifier is formed in the cavity. The workbench demolds the silicone rubber thumb pacifier through a blowing device, and an opening component is arranged inside the mold rod, and two arc plates are symmetrically arranged inside the mold rod, and the opening component pushes the arc plate to move in the horizontal direction, and a locking component is installed inside the cavity, and the locking component is used to limit the movement of the opening component in the horizontal direction.

[0008] By sliding the workbench on the long axis, the right mold is fixedly connected to the long axis, and the workbench controls the left mold to move left and right in the horizontal direction. When the left mold is fitted with the right mold, the left mold core, the right mold core and the mold rod form a cavity, and the molten liquid silicone rubber is injected into the cavity through the infusion runner. After the liquid silicone rubber is cooled, the silicone rubber thumb pacifier is formed in the cavity. After the silicone rubber thumb pacifier is formed, the workbench drives the left mold to move to the left, and the left mold and the right mold are separated from the fitting state. When the left mold moves to a certain position, the workbench drives the moving frame to move toward the right mold, and the moving frame slides relative to the inner wall of the left mold. The mold rod moves with the moving frame and separates from the left mold core. At this time, the silicone rubber thumb pacifier is sleeved on the mold rod. At this time, the air blowing device on the workbench starts to work to blow the silicone rubber thumb pacifier off the mold rod to prevent the composite silicone rubber thumb pacifier from being difficult to demold after being processed and formed due to the different shapes and sizes of the thumb pacifier mold, thereby affecting the demolding efficiency and facilitating the smooth demolding of the silicone rubber thumb pacifier. At the same time, the silicone rubber thumb pacifier is demolded after being expanded from the inside to reduce the fitting force between the inside of the silicone rubber thumb pacifier and the mold rod, thereby avoiding the problem of silicone rubber residue on the mold.

[0009] Preferably, the stretching assembly comprises a long rotating rod, a short rotating rod, a pressure rod, a horizontal moving rod, and an intermediate connecting rod, the two arc plates are fitted with the upper part of the mold rod to form a cylinder, a return spring is arranged between the two arc plates, one end of the pressure rod is arranged in the cavity, and the other end of the pressure rod passes through the movable frame and is slidably connected to the mold rod. The bottom of the pressure rod is located inside the mold rod, the upper part of the long rotating rod and the upper part of the short rotating rod are symmetrically rotatably installed on the bottom of the pressure rod, the bottom of the long rotating rod is rotatably connected to the arc plate on one side, and the bottom of the short rotating rod is rotatably connected to the arc plate on the other side, the horizontal moving rod is slidably installed on the moving frame, one end of the horizontal moving rod is connected to the interior of the left mold through a telescopic spring, one end of the intermediate connecting rod is rotatably connected to the horizontal moving rod, and the other end is rotatably connected to the top of the pressure rod, a pushing plate is vertically installed on the inner wall of the moving frame, the pushing plate passes through the interior of the horizontal moving rod, and when the horizontal moving rod slides to the right, it drives the arc plate to move to both sides.

[0010] By fitting the two arc plates to the upper part of the mold rod into a cylindrical shape, that is, the cylindrical part of the silicone rubber thumb pacifier, the arc plate can be limitedly moved in the horizontal direction, the upper end of the pressure rod is located in the cavity, and the lower end is located inside the mold rod. The pressure rod can be limitedly moved in the vertical direction. When the moving frame moves toward the right mold, the pushing plate pushes the horizontal moving rod to move to the right, the telescopic spring is extended, and the movement of the horizontal moving rod drives the middle connecting rod to limit rotation. When the middle connecting rod rotates, it drives the pressure rod to move vertically downward. At this time, the long rotating rod and the short rotating rod rotatably connected to the bottom of the pressure rod rotate at the same time, the reset spring is extended, and the two arc plates move away from the axis of the mold rod to open the inside of the silicone rubber thumb pacifier, so as to avoid residual silicone rubber material adhering to the mold rod when the silicone rubber thumb pacifier is demolded, and to prevent the silicone rubber thumb pacifier from being difficult to demold due to different mold shapes and sizes, thereby improving the demolding efficiency of the composite silicone rubber, and adding the linkage of the opening component on the basis of the existing technology without the need to add additional power, thereby saving production costs.

[0011] Preferably, the locking assembly includes a locking plate, a locking rod, a locking hole, a locking spring, a fixing rod, and a circular groove. The locking plate is slidably mounted on the pressure rod, and the locking spring is sleeved on the pressure rod. One end of the locking spring is connected to the bottom of the locking plate, and the other end is connected to the top of the mold rod. Two locking rods are symmetrically mounted on the locking plate, a locking hole is provided on the top of the arc plate, and the locking rod passes through the top of the mold rod and is inserted into the locking hole. Two circular grooves are symmetrically provided on the locking plate, and two fixing rods are symmetrically mounted inside the left mold. Semicircular protrusions are provided at the ends of the two fixing rods, and the semicircular protrusions abut against the surface of the locking plate. When the movable frame moves to the right, the semicircular protrusions slide in cooperation with the circular grooves.

[0012] By sliding the locking plate on the pressure rod, the locking plate can slide in the upper limit direction in the vertical direction. The locking plate is located in the cavity. When the mold rod is located inside the left mold core, the moving frame is also inside the left mold. One end of the fixed rod inside the left mold passes through the moving frame and is located in the cavity. The semicircular protrusion on the fixed rod abuts against the surface of the locking plate. The semicircular protrusion applies vertical downward pressure to the locking plate, and the locking spring is compressed. The bottom of the locking plate fits against the upper surface of the mold rod. The locking rod is inserted into the locking hole to limit the translational freedom of the arc plate. The locking assembly locks the expansion assembly. When the workbench drives the moving frame to move toward the direction close to the right mold, the fixed rod is fixed and locked. The plate moves with the moving frame, and the surface of the locking plate and the semicircular protrusion slide relative to each other. When the locking plate moves to the point where the semicircular protrusion cooperates with the circular groove, the semicircular protrusion cannot exert vertical downward pressure on the locking plate. At this time, the locking spring extends and exerts an upward thrust on the locking plate. The locking plate moves vertically upward, and the locking rod leaves the locking hole. The locking assembly releases the lock of the support assembly, and the arc plate can move in the horizontal direction. When the composite silicone rubber is injection molded, the locking assembly locks the support assembly to prevent the arc plate from sliding due to vibration or movement of mechanical equipment during the injection molding process, affecting the molding effect of the composite silicone rubber, thereby ensuring the finished product quality and yield of the composite silicone rubber.

[0013] Preferably, the lower portion of the mold rod is configured to be in a thumb shape, and one end of the thumb shape on the same cross-section is more protruding than the other end, the long rotating rod is located above the more protruding end, and the short rotating rod is on the opposite side of the long rotating rod, and the length of the long rotating rod is 4-5 mm longer than that of the short rotating rod.

[0014] By installing a long rotating rod and a short rotating rod of different lengths on two symmetrical arc plates, when the pressure rod moves vertically downward, the long rotating rod and the short rotating rod rotate at the same time to push the arc plates to both sides, the distance that the long rotating rod pushes the arc plate is greater than the distance that the short rotating rod pushes the arc plate, the long rotating rod is located on the more protruding side of the mold, and when the silicone rubber thumb pacifier is demolded, the thumb-shaped protruding part has a larger displacement space, which is convenient for demolding the silicone rubber thumb pacifier and improves the demolding efficiency of the composite silicone rubber.

[0015] Preferably, a sliding groove is provided on the horizontal moving rod, a round rod is provided at the rotational connection between the intermediate connecting rod and the horizontal moving rod, the round rod is slidably matched with the sliding groove, and the push plate passes through the sliding groove and is located on the left side of the round rod.

[0016] By arranging a round rod on the middle connecting rod, the round rod slides in the sliding groove. When the workbench drives the moving frame to move toward the right mold, the mold rod will drive the middle connecting rod to move, and the round rod slides in the sliding groove. At this time, the horizontal moving rod cannot drive the middle connecting rod to rotate. When the round rod moves to the end of the sliding groove, the middle connecting rod will rotate under the force brought by the push plate and the movement of the horizontal moving rod, driving the pressure rod to move vertically downward. The dynamic cooperation between the round rod and the sliding groove delays the start of the expansion component. When the mold rod leaves the left mold core, the arc plate will expand the silicone rubber thumb pacifier to avoid structural interference between the expansion component and the left mold core, thereby ensuring the stable operation of the mechanism.

[0017] Preferably, the two arc plates are provided with bonding plates, a through slot is formed on the bonding plate on one side, and a cylindrical pin is installed on the bonding plate on the other side, and the cylindrical pin passes through the through slot and slides with the through slot.

[0018] By arranging a fitting plate on the arc plate, a cylindrical shape is provided on the fitting plate for sliding cooperation with the through groove. When the rotating rod pushes the arc plate to both sides, the cylindrical pin slides in the through groove and abuts against the end of the through groove. When the arc plate continues to move to both sides, a slight swing will occur. After the arc plate opens the inside of the silicone rubber thumb pacifier, the transition between the finger part and the cylindrical part of the silicone rubber thumb pacifier is smoother, thereby improving the demoulding efficiency of the composite silicone rubber.

[0019] Preferably, two arc grooves are symmetrically provided on the locking plate, the two arc grooves pass through the locking plate, and the arc grooves are connected with the circular grooves, and the semicircular protrusions are slidably matched with the arc grooves.

[0020] By opening an arc groove on the locking plate, the arc groove is connected to the circular groove. When the fixed rod applies pressure to the locking plate, the semicircular protrusion is located in the arc groove. When the moving frame drives the locking plate to move, the semicircular protrusion moves on the arc groove and finally cooperates with the circular groove. The arc groove reduces the friction between the semicircular protrusion and the locking plate, thereby improving the response speed of the locking assembly.

[0021] A silicone rubber press molding method for the composite silicone rubber press molding mold comprises the following steps:

[0022] S1. The workbench drives the left mold to move horizontally on the long axis, and the right mold is fixed, so that the left mold and the right mold are fitted together, and the left mold core, the mold rod and the right mold core form a cavity.

[0023] S2. Inject the liquid silicone rubber heated to a molten state into the cavity of the mold through the injection channel.

[0024] S3. After the silicone rubber is cooled, the silicone rubber thumb pacifier is formed in the cavity, the workbench moves to the left, and the left mold is separated from the right mold.

[0025] S4, the workbench drives the moving frame to move to the right, and the silicone rubber thumb pacifier is separated from the cavity.

[0026] S5. After the moving frame moves a certain distance, the pushing plate pushes the horizontal moving rod to move rightward, so that the pressure rod moves vertically downward, and the arc plate moves to both sides to open the inside of the silicone rubber thumb pacifier.

[0027] S6. The workbench blows the silicone rubber thumb pacifier off the mold rod by blowing air, thereby completing the molding and demoulding of the silicone rubber thumb pacifier.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. By arranging a stretching component on the mold rod to push the arc plate, the arc plate stretches the inside of the silicone rubber thumb pacifier to prevent the composite silicone rubber thumb pacifier from being difficult to demold after processing and molding due to the different shapes and sizes of the thumb pacifier mold, affecting the demolding efficiency, facilitating the smooth demolding of the silicone rubber thumb pacifier. At the same time, the silicone rubber thumb pacifier is demolded after being stretched from the inside, reducing the fitting force between the inside of the silicone rubber thumb pacifier and the mold rod, and avoiding the problem of silicone rubber residue on the mold.

[0030] 2. By setting a locking component, the arc plate is locked when the composite silicone rubber is injection molded, so as to limit the translational freedom of the arc plate, avoid the arc plate sliding due to vibration or movement of mechanical equipment during the injection molding process, and affect the molding effect of the composite silicone rubber, thereby ensuring the finished product quality and yield of the composite silicone rubber.

[0031] 3. By setting different lengths for the rotating rod, the long rotating rod is located on the more protruding side of the mold, and the arc plate connected to the long rotating rod has a larger displacement when moving in the horizontal direction. When the silicone rubber thumb pacifier is demolded, the thumb-shaped protruding part has a larger displacement space, which is convenient for demolding the silicone rubber thumb pacifier and improves the demolding efficiency of the composite silicone rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the movement of the workbench of the present invention;

[0034] Figure 3 A bottom view of the structure of the present invention;

[0035] Figure 4 It is a schematic diagram of the molding of the silicone rubber thumb pacifier of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the propping assembly of the present invention;

[0037] Figure 6 A cut-away side view of the expansion assembly of the present invention;

[0038] Figure 7 It is a schematic diagram of a workbench driving moving frame of the present invention;

[0039] Figure 8 It is a schematic diagram of the movement of the arc plate of the present invention;

[0040] Fig. 9 Schematic diagram of the compression molding method of composite silicone rubber.

[0041] In the figure: 1. workbench; 101. long axis; 2. left mold; 21. left mold core; 3. right mold; 31. right mold core; 32. infusion flow channel; 4. mold rod; 5. moving frame; 51. cavity; 52. push plate; 6. silicone rubber thumb pacifier; 7. cavity; 8. expansion assembly; 81. arc plate; 811. bonding plate; 812. through groove; 813. cylindrical pin; 82. long rotating rod; 83. short rotating rod; 84. pressure rod; 85. horizontal moving rod; 851. sliding groove; 86. middle connecting rod; 861. round rod; 87. reset spring; 88. telescopic spring; 9. locking assembly; 91. locking plate; 92. locking rod; 93. locking hole; 94. locking spring; 95. fixing rod; 951. semicircular protrusion; 96. round groove; 10. arc slide groove. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "above", "fit", "inside", "bottom", "outside", "vertical", "left", "right", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] See also Figures 1 to 8 The present invention provides a composite material silicone rubber pressurized molding die, and the technical solution is as follows:

[0045] The long axis 101 is fixedly installed on the mechanical lathe, the upper end of the workbench 1 is slidably connected to the long axis 101, and the workbench 1 can move left and right in the horizontal direction. The left mold 2 is fixedly installed on the side of the workbench 1 by bolts, and a left mold core 21 is fixedly installed inside the left mold 2, and the right mold 3 is fixedly installed on the long rod. The right mold 3 is fixedly installed inside the right mold 3. The left mold core 21 and the right mold core 31 are in relative positions, and the left mold 2 and the right mold 3 are guaranteed to be on the same horizontal line. When the left mold 2 and the right mold 3 are fitted, the edge of the left mold core 21 fits with the edge of the right mold core 31, and the movable frame 5 is set to be a rectangular shape and slidably installed inside the left mold 2 The movable frame 5 is located above the left mold core 21, and a mold rod 4 is fixedly installed on the lower end surface of the movable frame 5. When the movable frame 5 is inside the left mold 2, the mold rod 4 is located inside the left mold core 21. A pouring channel 32 is opened at the bottom of the right mold 3, and the pouring channel 32 is connected to the right mold core 31. An opening component 8 is arranged inside the mold rod 4, and a locking component 9 is installed inside the cavity 51. The locking component 9 is used to limit the translational freedom of the opening component 8. When the workbench 1 moves to make the left mold 2 fit with the right mold 3, the left mold core 21, the right mold core 31 and the mold rod 4 form a cavity 7, and the liquid in the molten state The silicone rubber is injected into the cavity 7 through the injection channel 32, and the silicone rubber thumb pacifier 6 is formed in the cavity 7 after the liquid silicone rubber is cooled. After the silicone rubber thumb pacifier 6 is formed, the workbench 1 drives the left mold 2 to move to the left, and the left mold 2 and the right mold 3 are separated from the fitting state. When the left mold 2 moves to a certain position, the workbench 1 drives the moving frame 5 to move toward the right mold 3, and the moving frame 5 slides relative to the inner wall of the left mold 2. The mold rod 4 moves with the moving frame 5 and separates from the left mold core 21. At this time, the silicone rubber thumb pacifier 6 is sleeved on the mold rod 4. While the moving frame 5 moves, the locking component 9 gradually releases the restriction on the opening component 8. When the moving frame 5 moves, the locking component 9 gradually releases the restriction on the opening component 8. After the movable frame 5 moves a certain distance, the stretching component 8 starts to work, and the stretching component 8 stretches the silicone rubber thumb pacifier 6 from the inside to the outside, and the inner wall of the silicone rubber thumb pacifier 6 is separated from the fit with the mold rod 4. At this time, the blowing device on the workbench 1 starts to work to blow the silicone rubber thumb pacifier 6 off the mold rod 4 to prevent the composite material silicone rubber thumb pacifier 6 from being difficult to demold after being processed and formed due to the different shapes and sizes of the thumb pacifier mold, thereby affecting the demolding efficiency and facilitating the smooth demolding of the silicone rubber thumb pacifier 6. At the same time, the silicone rubber thumb pacifier 6 is demolded after being stretched from the inside, thereby reducing the fit between the inside of the silicone rubber thumb pacifier 6 and the mold rod 4, and avoiding the problem of silicone rubber residue on the mold.

[0046] As an embodiment of the present invention, refer to Figures 1 to 8The opening assembly 8 includes an arc plate 81, a long rotating rod 82, a short rotating rod 83, a pressure rod 84, a horizontal moving rod 85, and an intermediate connecting rod 86. Two arc plates 81 are symmetrically arranged on the mold rod 4. The two arc plates 81 are fitted with the upper part of the mold rod 4 to form a cylindrical shape, forming the cylindrical part of the silicone rubber thumb pacifier 6. The two arc plates 81 are connected by a reset spring 87. The arc plate 81 can be moved in the horizontal direction with a limited limit. One end of the pressure rod 84 is arranged in the cavity 51, and the other end passes through the moving frame 5 and is slidably connected to the mold rod 4. The pressure rod 84 can be moved in the vertical direction with a limited limit. The bottom of the pressure rod 84 is located inside the mold rod 4. The upper part of the long rotating rod 82 and the upper part of the short rotating rod 83 are symmetrically installed on the pressure rod 84. At the bottom, the bottom of the long rotating rod 82 is rotatably connected to the arc plate 81 on one side, and the bottom of the short rotating rod 83 is rotatably connected to the arc plate 81 on the other side. The horizontal moving rod 85 is slidably installed on the moving frame 5. One end of the horizontal moving rod 85 is connected to the inside of the left mold 2 through the telescopic spring 88. One end of the intermediate connecting rod 86 is rotatably connected to the horizontal moving rod 85, and the other end is rotatably connected to the top of the pressure rod 84. A pushing plate 52 is vertically installed on the inner wall of the moving frame 5. The pushing plate 52 passes through the inside of the horizontal moving rod 85, and the side wall of the pushing plate 52 contacts the end of the intermediate connecting rod 86. When the workbench 1 drives the moving frame 5 to move closer to the right mold 3, the pushing plate 52 pushes the horizontal moving rod 85 to move to the right, and the telescopic spring 88 stretches. The movement of the horizontal moving rod 85 drives the middle connecting rod 86 to limit the rotation. The rotation of the middle connecting rod 86 drives the pressure rod 84 to move vertically downward. At this time, the long rotating rod 82 and the short rotating rod 83, which are rotatably connected to the bottom of the pressure rod 84, rotate at the same time, and the reset spring 87 is extended. The two arc plates 81 move away from the axis of the mold rod 4 to open the inside of the silicone rubber thumb pacifier 6, so that the residual silicone rubber material is not attached to the mold rod 4 when the silicone rubber thumb pacifier 6 is demolded, and the silicone rubber thumb pacifier 6 is prevented from being difficult to demold due to the different shapes and sizes of the molds, thereby improving the demolding efficiency of the composite silicone rubber. On the basis of the existing technology, the linkage of the opening component 8 is added, and no additional power is required, which saves production costs; the lower part of the mold rod 4 is provided with a The thumb shape is set, and one end of the thumb shape on the same cross section is more protruding than the other end. The long rotating rod 82 is located above the mold of the more protruding end, and the short rotating rod 83 is on the opposite side of the long rotating rod 82. The length of the long rotating rod 82 is 4 mm longer than that of the short rotating rod 83. When the pressure rod 84 moves vertically downward, the long rotating rod 82 and the short rotating rod 83 rotate at the same time to push the arc plate 81 to both sides. The distance that the long rotating rod 82 pushes the arc plate 81 is greater than the distance that the short rotating rod 83 pushes the arc plate 81. The long rotating rod 82 is located on the more protruding side of the mold. When the silicone rubber thumb pacifier 6 is demolded, the thumb-shaped protruding part has a larger displacement space, which is convenient for demolding the silicone rubber thumb pacifier 6 and improves the demolding efficiency of the composite silicone rubber.A sliding groove 851 is provided in the middle of the horizontal moving rod 85, and a round rod 861 is provided at the rotation connection between the middle connecting rod 86 and the horizontal moving rod 85. The round rod 861 slides in the sliding groove 851, and the pushing plate 52 passes through the sliding groove 851 and is located on the left side of the round rod 861. When the workbench 1 drives the moving frame 5 to move toward the right mold 3, the mold rod 4 will drive the middle connecting rod 86 to move, and the round rod 861 slides in the sliding groove 851. At this time, the horizontal moving rod 85 cannot drive the middle connecting rod 86 to rotate. When the round rod 861 moves to the end of the sliding groove 851, under the force brought by the movement of the pushing plate 52 and the horizontal moving rod 85, the middle connecting rod 86 will rotate, driving the pressure rod 84 to move vertically downward. The dynamic cooperation between the round rod 861 and the sliding groove 851 delays the start of the support assembly 8. After the mold rod 4 leaves the left mold core 21, the arc plate 81 will open the silicone rubber thumb pacifier 6 again to avoid structural interference between the opening assembly 8 and the left mold core 21, thereby ensuring the stable operation of the mechanism; the two arc plates 81 are provided with a fitting plate 811, and a through slot 812 is provided on the fitting plate 811 on one side, and a cylindrical pin 813 is installed on the fitting plate 811 on the other side. The cylindrical pin 813 passes through the through slot 812 and slides with the through slot 812. When the rotating rod pushes the arc plate 81 to both sides, the cylindrical pin 813 slides in the through slot 812 and abuts against the end of the through slot 812. When the arc plate 81 continues to move to both sides, it will swing slightly, so that after the arc plate 81 opens the inside of the silicone rubber thumb pacifier 6, the transition between the finger part and the cylindrical part of the silicone rubber thumb pacifier 6 is smoother, thereby improving the demoulding efficiency of the composite silicone rubber. ;

[0047] As an embodiment of the present invention, refer to Figures 1 to 5The locking assembly 9 includes a locking plate 91, a locking rod 92, a locking hole 93, a locking spring 94, a fixing rod 95, and a circular groove 96. The locking plate 91 is slidably mounted on the pressure rod 84. The locking plate 91 can slide in the upper limit position in the vertical direction. The locking plate 91 is located in the cavity 51. The locking spring 94 is sleeved on the pressure rod 84. The upper end of the locking spring 94 is connected to the bottom of the locking plate 91, and the lower end is connected to the top of the mold rod 4. Two locking rods 92 are symmetrically installed at the bottom of the locking plate 91. A corresponding locking hole 93 is opened at the top of the arc plate 81. The locking rod 92 passes through the top of the mold rod 4 and is inserted into the locking hole 93. Two circular grooves 96 are symmetrically opened on the locking plate 91. Two fixing rods 95 are symmetrically installed inside the left mold 2. A semicircular protrusion 951 is provided at the end of the rod 95, and the semicircular protrusion 951 abuts against the surface of the locking plate 91. When the moving frame 5 moves to the right, the semicircular protrusion 951 slides with the circular groove 96. When the mold rod 4 is located inside the left mold core 21, the moving frame 5 is also inside the left mold 2. One end of the fixed rod 95 inside the left mold 2 passes through the moving frame 5 and is located in the cavity 51. The semicircular protrusion 951 on the fixed rod 95 abuts against the surface of the locking plate 91. The semicircular protrusion 951 applies vertical downward pressure to the locking plate 91, and the locking spring 94 is compressed. The bottom of the locking plate 91 fits with the upper surface of the mold rod 4. The locking rod 92 is inserted into the locking hole 93 to limit the translational freedom of the arc plate 81, and the locking component 9 locks the expansion component 8 When the workbench 1 drives the moving frame 5 to move toward the right mold 3, the fixing rod 95 is fixed, and the locking plate 91 moves with the moving frame 5. The surface of the locking plate 91 slides relative to the semicircular protrusion 951. When the locking plate 91 moves to the semicircular protrusion 951 and cooperates with the circular groove 96, the semicircular protrusion 951 cannot apply vertical downward pressure to the locking plate 91. At this time, the locking spring 94 extends and applies an upward thrust to the locking plate 91. The locking plate 91 moves vertically upward, and the locking rod 92 leaves the locking hole 93. The locking component 9 releases the lock on the expansion component 8, and the arc plate 81 can move in the horizontal direction. When the composite silicone rubber is injection molded, the locking component 9 locks the expansion component 8 to avoid the injection molding process. The vibration or movement of the mechanical equipment causes the arc plate 81 to slide, affecting the molding effect of the composite silicone rubber, thereby ensuring the quality and yield of the finished product of the composite silicone rubber; two arc grooves 10 are symmetrically provided on the locking plate 91, and the two arc grooves 10 pass through the locking plate 91, and the arc grooves 10 are connected to the circular groove 96, and the semicircular protrusion 951 slides with the arc groove 10. When the fixing rod 95 applies pressure to the locking plate 91, the semicircular protrusion 951 is located in the arc groove 10. When the moving frame 5 drives the locking plate 91 to move, the semicircular protrusion 951 moves on the arc groove 10 and finally cooperates with the circular groove 96. The arc groove 10 reduces the friction between the semicircular protrusion 951 and the locking plate 91, thereby improving the response speed of the locking assembly 9.

[0048] Silicone rubber press molding method and working principle using the above composite material silicone rubber press molding mold:

[0049] refer to Figures 1 to 9 :The workbench 1 drives the left mold 2 to move, so that the left mold 2 and the right mold 3 are fitted together. The left mold core 21, the right mold core 31 and the mold rod 4 constitute a cavity 7. The molten liquid silicone rubber is injected into the cavity 7 through the injection flow channel 32. After the liquid silicone rubber is cooled, the silicone rubber thumb pacifier 6 is formed in the cavity 7. After the silicone rubber thumb pacifier 6 is formed, the workbench 1 drives the left mold 2 to move to the left, and the left mold 2 and the right mold 3 are separated from the fitting state. When the left mold 2 moves to a certain position, the workbench 1 drives the moving frame 5 to move toward the right mold 3. The moving frame 5 and the inner wall of the left mold 2 slide relative to each other. The mold rod 4 moves with the moving frame 5 and separates from the left mold core 21. At this time, the silicone rubber thumb pacifier 6 is sleeved on the mold rod 4. During the movement of the moving frame 5, the arc groove 10 on the locking plate 91 and the semicircular protrusion 951 on the fixing rod 95 are relative to each other. When the locking plate 91 moves to the semicircular protrusion 951 and cooperates with the circular groove 96, the locking spring 94 extends and applies an upward thrust to the locking plate 91, and the locking plate 91 moves vertically upward. The locking rod 92 leaves the locking hole 93, and the locking assembly 9 releases the lock of the opening assembly 8. After the locking assembly 9 is unlocked, the round rod 861 slides in the sliding groove 851. When the round rod 861 moves to the end of the sliding groove 851, under the force brought by the movement of the pushing plate 52 and the horizontal moving rod 85, the middle connecting rod 86 rotates to drive the pressure rod 84 to move vertically downward. At this time, the long rotating rod 82 and the short rotating rod 83 connected to the bottom of the pressure rod 84 rotate at the same time, the reset spring 87 extends, and the two arc plates 81 move away from the axis of the mold rod 4. After the inside of the silicone rubber thumb pacifier 6 is opened, the blowing device on the workbench 1 works to blow the silicone rubber thumb pacifier 6 off the mold rod 4.

[0050] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A composite material silicone rubber pressurized molding mold, It is characterized in that The invention comprises a workbench (1), a left mold (2), a right mold (3), a mold rod (4), a movable frame (5), and a silicone rubber thumb pacifier (6). A long shaft (101) is slidably mounted on the workbench (1). The left mold (2) is fixedly mounted on the side of the workbench (1). A left mold core (21) is fixedly mounted inside the left mold (2). The movable frame (5) is arranged in a rectangular shape and has a cavity (51) inside. The movable frame (5) is slidably mounted inside the left mold (2). The movable frame (5) is located above the left mold core (21). The workbench (1) drives the movable frame (5) to move left and right in a horizontal direction. The mold rod (4) is fixedly mounted on the lower end surface of the movable frame (5). The right mold (3) is fixedly mounted on the long shaft (101). The right mold (3) has a cavity (51) inside. A right mold core (31) is fixedly installed on the right mold (3), and a pouring channel (32) is provided on the right mold (3), and the pouring channel (32) is communicated with the right mold core (31). When the left mold (2) and the right mold (3) are fitted together, the left mold core (21), the mold rod (4) and the right mold core (31) form a cavity (7), and the silicone rubber thumb pacifier (6) is molded in the cavity (7). The workbench (1) demoulds the silicone rubber thumb pacifier (6) through a blowing device. An opening component (8) is arranged inside the mold rod (4), and two arc plates (81) are symmetrically arranged inside the mold rod (4). The opening component (8) pushes the arc plates (81) to move in a horizontal direction. A locking component (9) is installed inside the cavity (51), and the locking component (9) is used to limit the movement of the opening component (8) in a horizontal direction.

2. A composite material silicone rubber pressurized molding die according to claim 1, It is characterized in that The stretching assembly (8) comprises a long rotating rod (82), a short rotating rod (83), a pressure rod (84), a horizontal moving rod (85), and an intermediate connecting rod (86). The two arc plates (81) are fitted with the upper part of the mold rod (4) to form a cylindrical shape. A return spring (87) is arranged between the two arc plates (81). One end of the pressure rod (84) is arranged in the cavity (51), and the other end of the pressure rod (84) passes through the moving frame (5) and is slidably connected to the mold rod (4). The bottom of the pressure rod (84) is located inside the mold rod (4). The upper part of the long rotating rod (82) and the upper part of the short rotating rod (83) are symmetrically rotatably mounted on the bottom of the pressure rod (84). ) is rotatably connected to the arc plate (81) on one side, the bottom of the short rotating rod (83) is rotatably connected to the arc plate (81) on the other side, the horizontal moving rod (85) is slidably installed on the moving frame (5), one end of the horizontal moving rod (85) is connected to the inside of the left mold (2) through a telescopic spring (88), one end of the intermediate connecting rod (86) is rotatably connected to the horizontal moving rod (85), and the other end is rotatably connected to the top of the pressure rod (84), and a push plate (52) is vertically installed on the inner wall of the moving frame (5), and the push plate (52) passes through the inside of the horizontal moving rod (85). When the horizontal moving rod (85) slides to the right, it drives the arc plate (81) to move to both sides.

3. A composite material silicone rubber pressurized molding die according to claim 2, It is characterized in that The locking assembly (9) comprises a locking plate (91), a locking rod (92), a locking hole (93), a locking spring (94), a fixing rod (95), and a circular groove (96). The locking plate (91) is slidably mounted on the pressure rod (84). The locking spring (94) is sleeved on the pressure rod (84). One end of the locking spring (94) is connected to the bottom of the locking plate (91), and the other end is connected to the top of the mold rod (4). Two locking rods (92) are symmetrically mounted on the locking plate (91). A locking hole (93) is provided at the top, and the locking rod (92) passes through the top of the mold rod (4) and is inserted into the locking hole (93). Two circular grooves (96) are symmetrically provided on the locking plate (91). Two fixing rods (95) are symmetrically installed inside the left mold (2). The ends of the two fixing rods (95) are provided with semicircular protrusions (951), and the semicircular protrusions (951) are in contact with the surface of the locking plate (91). When the movable frame (5) moves to the right, the semicircular protrusions (951) and the circular grooves (96) are slidably matched.

4. A composite material silicone rubber pressurized molding die according to claim 2, It is characterized in that The lower part of the mold rod (4) is set to be a thumb shape, and one end of the thumb shape on the same cross section is more protruding than the other end, the long rotating rod (82) is located above the more protruding end, and the short rotating rod (83) is on the opposite side of the long rotating rod (82), and the length of the long rotating rod (82) is 4-5 mm longer than the length of the short rotating rod (83).

5. A composite material silicone rubber pressurized molding die according to claim 2, It is characterized in that The horizontal moving rod (85) is provided with a sliding groove (851), and a round rod (861) is provided at the rotation connection between the intermediate connecting rod (86) and the horizontal moving rod (85). The round rod (861) is slidably matched with the sliding groove (851), and the pushing plate (52) passes through the sliding groove (851) and is located on the left side of the round rod (861).

6. A composite material silicone rubber pressurized molding die according to claim 2, It is characterized in that A bonding plate (811) is provided on the two arc plates (81), a through slot (812) is provided on the bonding plate (811) on one side, and a cylindrical pin (813) is installed on the bonding plate (811) on the other side, and the cylindrical pin (813) passes through the through slot (812) and is slidably matched with the through slot (812).

7. The composite material silicone rubber pressurized molding die according to claim 3, It is characterized in that The locking plate (91) is symmetrically provided with two arc grooves (10), the two arc grooves (10) penetrate the locking plate (91), and the arc grooves (10) are connected to the circular groove (96), and the semicircular protrusion (951) is slidably matched with the arc groove (10).

8. A silicone rubber pressure molding method using the composite silicone rubber mold according to any one of claims 1 to 7, It is characterized in that The following steps are involved: S1, the workbench (1) drives the left mold (2) to move horizontally on the long axis (101), and the right mold (3) is fixed, so that the left mold (2) and the right mold (3) are fitted together, and the left mold core (21), the mold rod (4) and the right mold core (31) form a mold cavity (7); S2, injecting the liquid silicone rubber heated to a molten state into the mold cavity (7) of the mold through the injection channel (32); S3, after the silicone rubber is cooled, the silicone rubber thumb pacifier (6) is formed in the mold cavity (7), the workbench (1) moves to the left, and the left mold (2) is separated from the right mold (3); S4, the workbench (1) drives the movable frame (5) to move to the right, and the silicone rubber thumb pacifier (6) is separated from the mold cavity (7); S5, after the moving frame (5) moves a certain distance, the pushing plate (52) pushes the horizontal moving rod (85) to move rightward, so that the pressure rod (84) moves vertically downward, and the arc plate (81) moves to both sides to open the inside of the silicone rubber thumb pacifier (6); S6. The workbench (1) blows the silicone rubber thumb pacifier (6) off the mold rod (4) by blowing air, thereby completing the molding and demoulding of the silicone rubber thumb pacifier (6).

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