Injection mold for cutting material handle in mold and injection molding production method

Abstract

The present invention discloses an injection mold and an injection molding production method for cutting a handle in a mold. The injection mold comprises a fixed mold component and a movable mold component that match each other. The fixed mold component comprises a fixed mold core plate and a fixed mold mounting plate that are slidably matched. A nozzle and a pull rod are arranged on the fixed mold mounting plate. The movable mold component comprises a movable mold core plate, an upper limit plate, a floating plate, an ejector plate and a lower limit plate that are arranged in sequence. The floating plate and the ejector plate are both movably arranged between the upper limit plate and the lower limit plate. A linkage mechanism is arranged between the floating plate and the pull rod. A return mechanism is arranged between the floating plate and the upper limit plate. A cutting knife cylinder is arranged on the floating plate. One end of the cutting knife cylinder penetrates the upper limit plate and the movable mold core plate and then abuts against the nozzle. A product ejector pin and a material handle ejector pin are arranged on the ejector plate. The present invention can realize the action of separating the material handle from the product in the mold, ensure the separation and ejection of the material handle from the product, and has a simple structure, which is conducive to realizing precise and standardized operation, and effectively improves product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding, and in particular relates to an injection mold for cutting a material handle in a mold and an injection molding production method. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. Injection molding is a process that uses pressurization, injection, cooling, and separation to make molten raw materials into semi-finished products of a certain shape. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding and processing fields such as products with complex shapes. With the rapid development of the economy, various plastic products have entered people's lives. The production of plastic products mostly adopts injection molding, that is, using an injection molding machine to inject molten plastic into the mold, and after the plastic is cooled and solidified, it is taken out for post-processing to obtain the product.

[0003] For different types of products, there are usually corresponding molds. After the product is injection molded, it often has a material handle. At this time, the material handle needs to be cut off to get the product. The existing technology can automatically cut off the material handle by driving the movement of the ejector pin through the machine ejector rod, or by driving the movement of the ejector pin through the cylinder. However, for some products with a small glue feeding space (4mm in diameter), it is impossible to automatically separate the product from the glue feeding point by placing the ejector pin and moving the ejector pin, resulting in the material handle being unable to be ejected, and the material handle cannot be automatically separated from the product. Therefore, it is necessary to design an injection mold and injection molding production method for in-mold cutting of the material handle. Summary of the invention

[0004] The purpose of the present invention is to provide an injection mold and an injection molding production method for cutting off the material handle in the mold, so as to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, on the one hand, the present invention adopts the following technical scheme: an injection mold for cutting a material handle in a mold, comprising a fixed mold assembly and a movable mold assembly that match each other, the fixed mold assembly comprising a slidingly matched fixed mold core plate and a fixed mold mounting plate, a fixed mold core plate is provided with a fixed mold cavity on the side close to the movable mold assembly, a runner is provided on the fixed mold core plate, a filling nozzle and a pull rod are provided on the fixed mold mounting plate, one end of the filling nozzle is slidably arranged in the runner, and one end of the pull rod passes through the fixed mold core plate and is connected to the movable mold assembly; the movable mold assembly comprises a movable mold core plate, an upper limit plate, a floating plate, an ejector plate and a lower limit plate arranged in sequence, and the movable mold core plate is provided with a movable mold cavity on the side close to the fixed mold assembly The floating plate and the ejector plate are both movably arranged between the upper limit plate and the lower limit plate. A linkage mechanism is arranged between the floating plate and the pull rod. The pull rod can drive the floating plate to move toward the upper limit plate through the linkage mechanism. A return mechanism for driving the floating plate to move toward the lower limit plate is arranged between the floating plate and the upper limit plate; a cutting knife cylinder is arranged on the floating plate, one end of which penetrates the upper limit plate and the movable mold core plate and abuts against the filling nozzle, and a feeding port connected to the movable model cavity or the fixed model cavity is opened on the cutting knife cylinder; a product ejector pin and a material handle ejector pin are arranged on the ejector plate, one end of the product ejector pin extends into the movable model cavity, and one end of the material handle ejector pin is slidably arranged in the cutting knife cylinder and closely matches with the cutting knife cylinder.

[0006] As an optional implementation of the above technical solution, the linkage mechanism includes a mold opening and closing control body, the floating plate is provided with a limiting slide groove adapted to the mold opening and closing control body, and an elastic member is provided between the mold opening and closing control body and the limiting slide groove; the floating plate is provided with a slideway adapted to the pull rod, the slideway is connected to the limiting slide groove, and a boss is provided at the end of the pull rod; the bottom of the mold opening and closing control body is provided with a corner abutment portion, the corner abutment portion abuts against the boss, and when the pull rod slides along the slideway and disengages from the floating plate, the boss can exert an external force on the mold opening and closing control body, so that the mold opening and closing control body can move with the floating plate in a direction close to the upper limit plate, so that the cutting knife cylinder cuts off the material handle of the feed port; the top of the mold opening and closing control body is provided with an inclined portion, and the bottom of the upper limit plate is provided with an inclined guide surface, the inclined portion and the inclined guide surface are slidably matched, so that the mold opening and closing control body can compress the elastic member and gradually move away from the boss during the movement of the pull rod.

[0007] As an optional implementation of the above technical solution, a platform portion is provided on the top of the opening and closing mold control body, and a limiting plane is provided on the bottom of the upper limit plate. The limiting plane is used to limit the platform portion of the opening and closing mold control body to limit the stroke of the floating plate.

[0008] As an optional implementation of the above technical solution, the elastic member includes a spring, one end of the spring is connected to the mold opening and closing control body, and the other end of the spring is connected to the inner wall of the limiting sliding groove.

[0009] As an optional implementation of the above technical solution, an ejection spring is provided between the fixed mold core plate and the fixed mold mounting plate.

[0010] As an optional implementation of the above technical solution, the return mechanism includes a return spring, and the return spring is arranged between the upper limit plate and the floating plate.

[0011] As an optional implementation of the above technical solution, the cutting cylinder includes a cylinder body and a cylinder seat, one end of the cylinder body is abutted against the filling nozzle, the other end of the cylinder body is connected to the cylinder seat, a feed port is arranged on the cylinder body, and the cylinder seat is installed on a floating plate.

[0012] As an optional implementation of the above technical solution, a first ejector pin hole and a second ejector pin hole are provided on the knife barrel seat, the first ejector pin hole matches the product ejector pin, the second ejector pin hole matches the material handle ejector pin, and the material handle ejector pin extends into the interior of the knife barrel body through the second ejector pin hole.

[0013] As an optional implementation of the above technical solution, the outer diameter of the cutter cylinder is smaller than the inner diameter of the runner.

[0014] As an optional implementation of the above technical solution, an ejection mechanism is provided on the lower limit plate, and the ejection mechanism is connected to the ejection plate.

[0015] As an optional implementation of the above technical solution, a left limit plate and a right limit plate are provided between the upper limit plate and the lower limit plate, the floating plate and the ejection plate are both located between the left limit plate and the right limit plate, and the left limit plate and the right limit plate are both provided with support steps adapted to the floating plate.

[0016] On the other hand, the present invention adopts the following technical solution: an injection molding production method for in-mold cutting of a material handle, using the above-mentioned injection molding mold for in-mold cutting of a material handle, the injection molding production method comprising:

[0017] The fixed mold assembly and the movable mold assembly are molded together, and molten plastic is injected into the fixed mold cavity and the movable mold cavity through the injection nozzle. A part of the molten plastic forms a product between the fixed mold cavity and the movable mold cavity, and another part of the molten plastic remains in the injection nozzle to form a material handle, which is connected to the product;

[0018] When the mold is opened for the first time, the fixed mold mounting plate is driven to move away from the fixed mold core plate. The fixed mold mounting plate moves with the filling nozzle and the pull rod. The pull rod drives the floating plate to approach the upper limit plate through the linkage mechanism. The cutter cylinder moves toward the filling nozzle along with the floating plate, and the cutter cylinder cuts off the material handle.

[0019] The pull rod and the linkage mechanism gradually separate, the return mechanism drives the floating plate to return, and the cutter cylinder and the material handle return to their original positions;

[0020] The second mold opening drives the fixed mold core plate and the movable mold core plate to separate, the product is ejected by the product ejector pin, and the material handle is ejected from the cutting cylinder by the material handle ejector pin.

[0021] The beneficial effects of the present invention are:

[0022] The present invention does not need to arrange ejector pins, does not affect the glue feeding position of the product, does not affect the product function, can realize the action of separating the material handle and the product in the mold, ensures the separation and ejection of the material handle and the product, has a simple structure, is conducive to realizing precise and standardized operation, and effectively improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the product and the material handle in one embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of an injection mold in one embodiment of the present invention;

[0025] Figure 3 is a state diagram of an injection mold when injecting a product in one embodiment of the present invention;

[0026] Figure 4 This is a state diagram of a cutting knife cylinder not cutting off the material handle in one embodiment of the present invention;

[0027] Figure 5 is a state diagram of an injection mold when the mold is opened for the first time in one embodiment of the present invention;

[0028] Figure 6 It is a state diagram of a cutting knife cylinder cutting off a material handle in one embodiment of the present invention;

[0029] Figure 7 is a state diagram of the injection mold during the second mold opening in one embodiment of the present invention;

[0030] Figure 8 is a state diagram of ejecting a product and a material handle in one embodiment of the present invention;

[0031] Fig. 9 is a schematic structural diagram of a cutting knife cylinder in one embodiment of the present invention;

[0032] Fig.10 It is a structural schematic diagram of a linkage mechanism in one embodiment of the present invention.

[0033] In the figure: 1-fixed mold assembly; 2-movable mold assembly; 3-product; 4-material handle;

[0034] 101-fixed mold core plate; 102-fixed mold mounting plate; 103-filling nozzle; 104-pull rod; 105-boss; 106-ejection spring;

[0035] 201-movable mold core plate; 202-upper limit plate; 203-floating plate; 204-ejection plate; 205-lower limit plate; 206-linking mechanism; 207-return mechanism; 208-cutter cylinder; 209-ejection mechanism; 210-left limit plate; 211-right limit plate; 212-support step;

[0036] 2041- product ejector pin; 2042- material handle ejector pin;

[0037] 2061- opening and closing mold control body; 2062- elastic member; 2063- corner abutment portion; 2064- inclined portion; 2065- platform portion;

[0038] 2081 - knife barrel body; 2082 - knife barrel seat; 2083 - second ejector pin hole. DETAILED DESCRIPTION

[0039] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0040] like Figure 1-Figure 10 As shown, this embodiment provides an injection mold for cutting a material handle in a mold, including a fixed mold component 1 and a movable mold component 2 that match each other, such as Figure 2 As shown, the fixed mold assembly 1 includes a fixed mold core plate 101 and a fixed mold mounting plate 102 that are slidably matched, and an ejection spring 106 is provided between the fixed mold core plate 101 and the fixed mold mounting plate 102. Under the action of external force, the ejection spring 106 is compressed, and the fixed mold core plate 101 and the fixed mold mounting plate 102 are closely attached to each other; after the external force is eliminated, the ejection spring 106 drives the fixed mold mounting plate 102 to move upward, so that the fixed mold mounting plate 102 is away from the fixed mold core plate 101.

[0041] A fixed mold cavity is provided on one side of the fixed mold core plate 101 close to the movable mold assembly 2, a runner is provided on the fixed mold core plate 101, a filling nozzle 103 and a tie rod 104 are provided on the fixed mold mounting plate 102, one end of the filling nozzle 103 is slidably arranged in the runner, the material handle 4 is formed inside the filling nozzle 103, and one end of the tie rod 104 penetrates the fixed mold core plate 101 and is connected to the movable mold assembly 2. The fixed mold mounting plate 102 can move upward with the filling nozzle 103 and the tie rod 104, so that the filling nozzle 103 moves upward along the runner.

[0042] like Figure 2 As shown, the movable mold assembly 2 includes a movable mold core plate 201, an upper limit plate 202, a floating plate 203, an ejector plate 204 and a lower limit plate 205 which are arranged in sequence from top to bottom. A movable mold cavity is provided on the side of the movable mold core plate 201 close to the fixed mold assembly 1. The movable mold cavity is connected to the fixed mold cavity. The space between the movable mold cavity and the fixed mold cavity is used to mold the product 3, thereby realizing injection molding of the product 3.

[0043] The floating plate 203 and the ejector plate 204 are both movably arranged between the upper limit plate 202 and the lower limit plate 205. A linkage mechanism 206 is arranged between the floating plate 203 and the pull rod 104. The pull rod 104 can drive the floating plate 203 to move toward the upper limit plate 202 through the linkage mechanism 206. A return mechanism 207 for driving the floating plate 203 to move toward the lower limit plate 205 is arranged between the floating plate 203 and the upper limit plate 202; the return mechanism 207 includes a return spring, and the return spring is arranged between the upper limit plate 202 and the floating plate 203. A cutter cylinder 208 is arranged on the floating plate 203, one end of which penetrates the upper limit plate 202 and the movable mold core plate 201 and then abuts against the filling nozzle 103. A feed port connected to the movable mold cavity or the fixed mold cavity is opened on the cutter cylinder 208. After passing through the filling nozzle 103, the molten plastic enters the movable mold cavity and the fixed mold cavity from the feed port. A part of the molten plastic forms the product 3 between the fixed mold cavity and the movable mold cavity, and another part of the molten plastic remains in the filling nozzle 103 to form a material handle 4, which is connected to the product 3 as a whole.

[0044] The ejector plate 204 is provided with a product ejector pin 2041 and a material handle ejector pin 2042. One end of the product ejector pin 2041 extends into the dynamic mold cavity, and one end of the material handle ejector pin 2042 is slidably disposed in the cutter cylinder 208 and closely matched with the cutter cylinder 208. A left limit plate 210 and a right limit plate 211 are provided between the upper limit plate 202 and the lower limit plate 205. The floating plate 203 and the ejector plate 204 are both located between the left limit plate 210 and the right limit plate 211. The left limit plate 210 and the right limit plate 211 are both provided with a support step 212 adapted to the floating plate 203.

[0045] There is a parting surface 1 between the fixed mold core plate 101 and the movable mold core plate 201, and there is a parting surface 2 between the fixed mold core plate 101 and the fixed mold mounting plate 102. After the product 3 is injection molded, the first mold opening is performed at the parting surface 2, driving the fixed mold mounting plate 102 to move in a direction away from the fixed mold core plate 101, and the fixed mold mounting plate 102 moves with the filling nozzle 103 and the tie rod 104. The tie rod 104 drives the floating plate 203 to approach the upper limit plate 202 through the linkage mechanism 206, and the cutter cylinder 208 moves with the floating plate 203 toward the filling nozzle 103. The cutter cylinder 208 cuts off the material handle 4, and the product 3 is separated from the material handle 4. The tie rod 104 and the linkage mechanism 206 are gradually separated, and the return mechanism 207 drives the floating plate 203 to return, and the cutter cylinder 208 and the material handle 4 return to their original positions. The second mold opening is performed at the parting surface 1 to drive the fixed mold core plate 101 to separate from the movable mold core plate 201, and the product 3 is ejected by the product ejector pin 2041, and the material handle 4 is ejected from the cutting cylinder 208 by the material handle ejector pin 2042.

[0046] The present invention does not need to arrange ejector pins, does not affect the glue feeding position of the product 3, does not affect the function of the product 3, can realize the action of separating the material handle 4 and the product 3 in the mold, ensures the separation and ejection of the material handle 4 and the product 3, has a simple structure, is conducive to realizing precise and standardized operation, and effectively improves the quality of the product 3.

[0047] like Fig.10 As shown, specifically, the linkage mechanism 206 includes a mold opening and closing control body 2061, the floating plate 203 is provided with a limiting slide groove adapted to the mold opening and closing control body 2061, and an elastic member 2062 is provided between the mold opening and closing control body 2061 and the limiting slide groove, the elastic member 2062 includes a spring, one end of the spring is connected to the mold opening and closing control body 2061, and the other end of the spring is connected to the inner wall of the limiting slide groove, and the elastic member 2062 drives the mold opening and closing control body 2061 to move left and right along the limiting slide groove. The floating plate 203 is provided with a slideway adapted to the pull rod 104, the slideway is connected to the limiting slide groove, the end of the pull rod 104 is provided with a boss 105, and the elastic member 2062 can drive the mold opening and closing control body 2061 to extend into the slideway.

[0048] Preferably, the bottom of the mold opening and closing control body 2061 is provided with a corner abutment 2063, which abuts against the boss 105. When the pull rod 104 slides along the slideway and detaches from the floating plate 203, the boss 105 can apply an external force to the mold opening and closing control body 2061, so that the mold opening and closing control body 2061 can move with the floating plate 203 toward the direction close to the upper limit plate 202, so that the cutter cylinder 208 cuts off the material handle 4 at the feed port. The top of the mold opening and closing control body 2061 is provided with an inclined portion 2064, and the bottom of the upper limit plate 202 is provided with an inclined guide surface. The inclined portion 2064 and the inclined guide surface are slidably matched, so that the mold opening and closing control body 2061 can compress the elastic member 2062 and gradually move away from the boss 105 during the movement of the pull rod 104. Furthermore, a platform portion 2065 is provided on the top of the mold opening and closing control body 2061 , and a limiting plane is provided on the bottom of the upper limit plate 202 . The limiting plane is used to limit the platform portion 2065 of the mold opening and closing control body 2061 to limit the stroke of the floating plate 203 .

[0049] When the pull rod 104 moves upward, the boss 105 of the pull rod 104 abuts against the corner abutment 2063, so that the pull rod 104 can move upward with the mold opening and closing control body 2061, and the mold opening and closing control body 2061 moves upward with the floating plate 203, so that the cutting cylinder 208 cuts off the material handle 4 at the feed port; when the mold opening and closing control body 2061 moves upward, the inclined portion 2064 of the mold opening and closing control body 2061 slides along the inclined guide surface, so that the mold opening and closing control body 2061 slides to the right along the limiting slide groove and compresses the spring; when the platform portion 2065 of the mold opening and closing control body 2061 contacts the limiting plane, the boss 105 separates from the corner abutment 2063, the pull rod 104 continues to move upward, and the floating plate 203 moves downward and returns to its original position under the action of the return mechanism 207.

[0050] like Fig. 9 As shown, in a specific embodiment, the cutter barrel 208 includes a barrel body 2081 and a barrel seat 2082. One end of the barrel body 2081 abuts against the nozzle 103, and the other end of the barrel body 2081 is connected to the barrel seat 2082. The barrel body 2081 is provided with a feed port, and the barrel seat 2082 is fixedly mounted on the floating plate 203. The barrel seat 2082 is provided with a first ejector hole and a second ejector hole 2083. The first ejector hole matches the product ejector 2041, and the second ejector hole 2083 matches the material handle ejector 2042. The material handle ejector 2042 extends into the barrel body 2081 through the second ejector hole 2083. The outer diameter of the cutter barrel 208 is smaller than the inner diameter of the runner. The cutter barrel 208 moves upward to extend into the runner to cut off the material handle 4.

[0051] In a specific embodiment, an ejection mechanism 209 is provided on the lower limit plate 205, and the ejection mechanism 209 is connected to the ejection plate 204. The ejection mechanism 209 drives the ejection plate 204 to move up and down, so that the product ejector 2041 ejects the product 3, and the material handle ejector 2042 ejects the material handle 4 from the cutting cylinder 208.

[0052] The present invention adopts the motion principle of the movable fixed mold opening, designs a fixed mold mounting plate 102 on the fixed mold side, installs two tie rods 104 on the fixed mold mounting plate 102, and sets a boss 105 on the tie rod 104. The boss 105 cooperates with the mold opening and closing controller and controls the stroke of the cutter cylinder 208, thereby controlling the cutting distance between the material handle 4 and the product 3. After the first mold opening reaches the specified distance, the material handle 4 and the product 3 complete the cutting action. At this time, the cutter cylinder 208 and the floating plate 203 will return to the original position, and the mold will be opened for the second time. After the front mold is completely separated, the machine ejector drives the ejector plate 204 to eject the product 3 and the material handle 4 out of the mold until the next injection molding is completed and the aforementioned mold opening action is repeated.

[0053] This embodiment also provides an injection molding production method for an in-mold cut-off handle, using the above-mentioned injection mold for the in-mold cut-off handle 4, the injection molding production method comprises:

[0054] Step A, close the fixed mold assembly 1 and the movable mold assembly 2, and inject molten plastic into the fixed mold cavity and the movable mold cavity through the filling nozzle 103. A part of the molten plastic forms the product 3 between the fixed mold cavity and the movable mold cavity, and another part of the molten plastic remains in the filling nozzle 103 to form a material handle 4, which is connected to the product 3.

[0055] Step B, the first mold opening drives the fixed mold mounting plate 102 to move in the direction away from the fixed mold core plate 101, and the fixed mold mounting plate 102 moves with the filling nozzle 103 and the pull rod 104. The pull rod 104 drives the floating plate 203 to approach the upper limit plate 202 through the linkage mechanism 206, and the cutting cylinder 208 moves with the floating plate 203 toward the filling nozzle 103, and the cutting cylinder 208 cuts off the material handle 4 and separates it from the product 3.

[0056] Step C, the pull rod 104 and the linkage mechanism 206 are gradually separated, the return mechanism 207 drives the floating plate 203 to return, and the cutting cylinder 208 and the material handle 4 return to their original positions.

[0057] Step D, opening the mold for the second time, driving the fixed mold core plate 101 to separate from the movable mold core plate 201, ejecting the product 3 through the product ejector pin 2041, and ejecting the material handle 4 from the cutting cylinder 208 through the material handle ejector pin 2042.

[0058] Compared with the prior art, the present invention has the following advantages:

[0059] 1. Solve the problem that the ejector pins cannot be arranged and the material handle 4 cannot be ejected because the product is too small;

[0060] 2. Solve the problem that the product 3 and the handle 4 cannot be automatically separated in the mold due to the small size of the product;

[0061] 3. Simple and stable structure, saving mold design space;

[0062] 4. The mold of the present invention is compact, which greatly reduces the weight of the material handle 4 and reduces production costs;

[0063] 5. Each part of the present invention is machined, the manufacturing difficulty and cost are low and the parts have high precision;

[0064] 6. The present invention is easy and quick to install, reducing the cost of use and maintenance.

[0065] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. An injection mold for in-mold cutting of a material handle, comprising a fixed mold component (1) and a movable mold component (2) that match each other, characterized in that: The fixed mold assembly (1) comprises a fixed mold core plate (101) and a fixed mold mounting plate (102) which are slidably matched, a fixed mold cavity is provided on a side of the fixed mold core plate (101) close to the movable mold assembly (2), a runner is provided on the fixed mold core plate (101), and a pouring nozzle (103) and a pull rod (104) are provided on the fixed mold mounting plate (102), one end of the pouring nozzle (103) is slidably arranged in the runner, and one end of the pull rod (104) passes through the fixed mold core plate (101) and is connected to the movable mold assembly (2); The movable mold assembly (2) comprises a movable mold core plate (201), an upper limit plate (202), a floating plate (203), an ejector plate (204) and a lower limit plate (205) which are arranged in sequence; a movable mold cavity is provided on a side of the movable mold core plate (201) close to the fixed mold assembly (1); the floating plate (203) and the ejector plate (204) are both movably arranged between the upper limit plate (202) and the lower limit plate (205); a linkage mechanism (206) is provided between the floating plate (203) and the pull rod (104); the pull rod (104) can be moved by the linkage mechanism The mechanism (206) drives the floating plate (203) to move toward the upper limit plate (202); a return mechanism (207) is provided between the floating plate (203) and the upper limit plate (202) for driving the floating plate (203) to move toward the lower limit plate (205); a cutting knife cylinder (208) is provided on the floating plate (203); one end of the cutting knife cylinder (208) penetrates the upper limit plate (202) and the movable mold core plate (201) and then abuts against the filling nozzle (103); a feeding port communicating with the movable mold cavity or the fixed mold cavity is provided on the cutting knife cylinder (208); The ejector plate (204) is provided with a product ejector pin (2041) and a material handle ejector pin (2042); one end of the product ejector pin (2041) extends into the dynamic mold cavity, and one end of the material handle ejector pin (2042) is slidably disposed in the cutter cylinder (208) and closely matches the cutter cylinder (208); The linkage mechanism (206) comprises a mold opening and closing control body (2061); the floating plate (203) is provided with a limiting slide groove adapted to the mold opening and closing control body (2061); and an elastic member (2062) is provided between the mold opening and closing control body (2061) and the limiting slide groove; the floating plate (203) is provided with a slideway adapted to the pull rod (104); the slideway is connected to the limiting slide groove; and a boss (105) is provided at the end of the pull rod (104); a corner abutment portion (2063) is provided at the bottom of the mold opening and closing control body (2061); the corner abutment portion (2063) abuts against the boss (105); the pull rod (104) slides along the slideway and detaches from the floating plate ( When the mold opening and closing control body (2061) moves with the floating plate (203), the boss (105) can exert an external force on the mold opening and closing control body (2061), so that the mold opening and closing control body (2061) can move with the floating plate (203) in a direction close to the upper limit plate (202), so that the cutting knife cylinder (208) cuts off the material handle (4) at the feed port; the top of the mold opening and closing control body (2061) is provided with an inclined portion (2064), and the bottom of the upper limit plate (202) is provided with an inclined guide surface, and the inclined portion (2064) and the inclined guide surface are slidably matched, so that the mold opening and closing control body (2061) can compress the elastic member (2062) and gradually move away from the boss (105) during the movement of the pull rod (104); The cutting knife cylinder (208) comprises a knife cylinder body (2081) and a knife cylinder seat (2082); one end of the knife cylinder body (2081) is in contact with the filling nozzle (103); the other end of the knife cylinder body (2081) is connected to the knife cylinder seat (2082); a feed port is provided on the knife cylinder body (2081); the knife cylinder seat (2082) is mounted on the floating plate (203); a first ejector pin hole and a second ejector pin hole (2083) are provided on the knife cylinder seat (2082); the first ejector pin hole matches the product ejector pin (2041); the second ejector pin hole (2083) matches the material handle ejector pin (2042); the material handle ejector pin (2042) extends into the knife cylinder body (2081) through the second ejector pin hole (2083); The top of the mold opening and closing control body (2061) is provided with a platform portion (2065), and the bottom of the upper limit plate (202) is provided with a limiting plane, and the limiting plane is used to limit the platform portion (2065) of the mold opening and closing control body (2061) to limit the travel of the floating plate (203).

2. The injection mold for in-mold cutting of the material handle according to claim 1, characterized in that: The elastic member (2062) comprises a spring, one end of which is connected to the mold opening and closing control body (2061), and the other end of which is connected to the inner wall of the limiting sliding groove.

3. The injection mold for in-mold cutting of the material handle according to claim 1, characterized in that: An ejection spring (106) is provided between the fixed mold core plate (101) and the fixed mold mounting plate (102); the return mechanism (207) comprises a return spring, and the return spring is provided between the upper limit plate (202) and the floating plate (203).

4. The injection mold for in-mold cutting of the material handle according to claim 1, characterized in that: The outer diameter of the cutter cylinder (208) is smaller than the inner diameter of the runner.

5. The injection mold for in-mold cutting of the material handle according to claim 1, characterized in that: An ejection mechanism (209) is provided on the lower limit plate (205), and the ejection mechanism (209) is connected to the ejection plate (204); a left limit plate (210) and a right limit plate (211) are provided between the upper limit plate (202) and the lower limit plate (205); the floating plate (203) and the ejection plate (204) are both located between the left limit plate (210) and the right limit plate (211); and the left limit plate (210) and the right limit plate (211) are both provided with a support step (212) adapted to the floating plate (203).

6. An injection molding production method for in-mold cutting of a material handle, characterized in that: The injection mold for in-mold cutting of the material handle according to any one of claims 1 to 5 is used, and the injection molding production method comprises: The fixed mold assembly (1) and the movable mold assembly (2) are molded together, and molten plastic is injected into the fixed mold cavity and the movable mold cavity through the injection nozzle (103), so that a part of the molten plastic forms a product (3) between the fixed mold cavity and the movable mold cavity, and another part of the molten plastic remains in the injection nozzle (103) to form a material handle (4), and the material handle (4) is connected to the product (3); When the mold is opened for the first time, the fixed mold mounting plate (102) is driven to move in a direction away from the fixed mold core plate (101), and the fixed mold mounting plate (102) moves with the filling nozzle (103) and the pull rod (104), and the pull rod (104) drives the floating plate (203) to approach the upper limit plate (202) through the linkage mechanism (206), and the cutting cylinder (208) moves along with the floating plate (203) toward the filling nozzle (103), and the cutting cylinder (208) cuts off the material handle (4); The pull rod (104) and the linkage mechanism (206) gradually separate, the return mechanism (207) drives the floating plate (203) to return, and the cutting cylinder (208) and the material handle (4) return to their original positions; The second mold opening drives the fixed mold core plate (101) to separate from the movable mold core plate (201), ejects the product (3) through the product ejector pin (2041), and ejects the material handle (4) from the cutting knife cylinder (208) through the material handle ejector pin (2042).

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