Injection molding machine for rubber product production

Abstract

The present disclosure relates to the technical field of rubber product processing, and one embodiment of the present disclosure provides an injection molding machine for rubber product production, which comprises an injection molding machine body and a feeding box connected to the top of the injection molding machine body, an extrusion sleeve fixedly sleeved on the extrusion end of the injection molding machine body through bolts, a pushing assembly arranged in the feeding box, and a crushing assembly arranged in the feeding box. The crushing assembly comprises an inner partition layer arranged in the feeding box. A pair of rotating rollers are connected to the inside of the feeding box through horizontal rotation. One end of each of the rotating rollers is provided with a transmission wheel. One of the rotating rollers is driven to rotate through electricity. The transmission wheels are connected through a belt transmission. Through the above technical solution, the technical problem that the existing injection molding machine for rubber product production does not generally have a raw material crushing function and is prone to blockage during feeding is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of rubber product processing, and specifically to an injection molding machine for producing rubber products. Background Technology

[0002] In the field of rubber product manufacturing (such as seals, rubber tubing, and precision rubber parts), injection molding machines are key equipment for realizing the injection molding of melted rubber raw materials. By feeding rubber raw materials into the barrel, melting them, and then injecting them into the mold, regular rubber products are quickly produced. The stability of the feeding process directly determines the production efficiency and the quality of the molded products. As rubber products develop towards precision and mass production, the shortcomings of traditional injection molding machines are becoming increasingly apparent: existing injection molding machines used in rubber product manufacturing generally lack raw material crushing capabilities, and blockages are prone to occur during the feeding process, which not only interrupts the production process but also affects the uniformity of raw material melting, making it difficult to meet the demands for efficient and stable production.

[0003] Traditional rubber injection molding machines typically use a single conveying structure for their feeding system, which relies on pre-treated granular rubber raw materials. If lumpy impurities or granular clumps are mixed in with the raw materials, the feeding system, lacking a crushing mechanism, cannot handle them, easily leading to blockages at the hopper outlet and the feed screw. At the same time, rubber raw materials have a certain degree of viscosity, which can easily adhere to the inner wall of the hopper or the surface of the screw during the feeding process. Over time, this accumulation can cause blockages, requiring manual cleaning after machine shutdown. This not only prolongs production downtime but also increases the labor intensity of operators.

[0004] Therefore, developing injection molding machines for rubber product manufacturing that have raw material crushing capabilities and can prevent clogging has become an urgent need to improve production stability and product quality. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide an injection molding machine for rubber product manufacturing, which solves the technical problem that existing injection molding machines for rubber product manufacturing generally do not have raw material crushing function and are prone to blockage during the feeding process.

[0006] According to one aspect, at least one embodiment of this disclosure provides an injection molding machine for manufacturing rubber products, comprising: The injection molding machine body and the feed box, wherein the feed box is connected to the top of the injection molding machine body; A pair of extrusion sleeves and a pusher assembly are provided. The extrusion sleeves are fixedly mounted on the extrusion end of the injection molding machine body by bolts, and the pusher assembly is disposed in the feed box. A crushing assembly, wherein the crushing assembly is disposed inside the feed hopper; The crushing assembly includes an inner partition, which is disposed inside the feed box. Inside the feed box, a pair of rotating rollers are connected by horizontal rotation. Each rotating roller has a drive wheel at one end. One of the rotating rollers is driven to rotate by electricity, and the drive wheels are connected by belt drive.

[0007] As a further technical solution, the rotating roller is provided with blades around its circumference, the blades are slidably attached to the inner surface of the inner partition, and the inner partition surface is provided with a number of feed ports.

[0008] According to another aspect, in at least one embodiment of the present invention, the pushing assembly includes a round rod, which is horizontally rotatably connected inside the feeding box. One end of the round rod is provided with a transmission gear, which is located outside the feeding box. A drive motor is installed outside the feeding box.

[0009] As a further technical solution, a transmission rack is horizontally slidably connected to the outer surface of the feed box, the transmission rack meshes with the transmission gear, a connecting frame is provided at one end of the transmission rack, and a rotating frame is provided at the output end of the drive motor.

[0010] As a further technical solution, a transmission rod is rotatably connected to the rotating frame. The connection between the rotating frame and the transmission rod adopts an eccentric structure. The other end of the transmission rod is rotatably connected to the connecting frame through a pin. Several push rods are provided at the bottom of the round rod.

[0011] As a further technical solution, the push rod adopts a downward-opening V-shaped structure.

[0012] As a further technical solution, both ends of the bottom surface of the feed box are inclined structural surfaces.

[0013] As a further technical solution, the blade is spirally coiled around the surface of the rotating roller.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the crushing component, through a dual-roller linkage and precision cutting design, solves the problems of traditional injection molding machines lacking raw material crushing capabilities and having uneven raw material particle size. The two rotating rollers rotate synchronously in opposite directions, and the spiral blades generate continuous shearing force, crushing lumpy or agglomerated raw materials into uniform fine particles, ensuring uniform subsequent melting. The blades adhere to the inner partition, scraping away adhering raw materials to prevent residual agglomerates, and the long feed inlet controls the amount of raw material falling, preventing a single influx that could cause blockages. The inner partition separates the feeding and crushing areas, guiding the raw material precisely to the blades and improving crushing efficiency. This structure allows the injection molding machine to directly process lumpy raw materials without relying on pre-treatment, simplifying the production process and ensuring uniform raw material particle size, laying the foundation for high-quality injection molding and reducing product defects caused by uneven raw material distribution. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; In the diagram: 1. Injection molding machine body; 2. Feed box; 3. Extrusion sleeve; 4. Crushing assembly; 4-1. Inner partition; 4-2. Rotating roller; 4-3. Drive wheel; 4-4. Blade; 4-5. Long feed inlet; 5. Pushing assembly; 5-1. Round rod; 5-2. Drive gear; 5-3. Drive motor; 5-4. Drive rack; 5-5. Connecting frame; 5-6. Rotating frame; 5-7. Drive rod; 5-8. Push rod. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-3 As shown, it illustrates an injection molding machine for producing rubber products according to an embodiment of the present disclosure, comprising: The injection molding machine body 1 and the feeding box 2 are connected to the top of the injection molding machine body 1; A pair of extrusion sleeves 3 and a pusher assembly 5 are provided. The extrusion sleeves 3 are fixedly mounted on the extrusion end of the injection molding machine body 1 by bolts, and the pusher assembly 5 is disposed in the feed box 2. Crushing component 4 is disposed inside the feed box 2; The crushing component 4 includes an inner partition 4-1, which is disposed inside the feed box 2. A pair of rotating rollers 4-2 are horizontally rotatably connected inside the feed box 2. Each of the rotating rollers 4-2 has a drive wheel 4-3 at one end. One of the rotating rollers 4-2 is driven to rotate by electricity. The drive wheels 4-3 are connected by a belt drive. Blades 4-4 are arranged around the surface of the rotating roller 4-2. The blades 4-4 slide against the inner surface of the inner partition 4-1. The surface of the inner partition 4-1 has several feed inlets 4-5.

[0024] In some examples, in order to achieve secondary fine crushing of rubber raw materials, ensure uniform particle size, and avoid affecting the injection molding quality due to uneven particle size, a crushing component 4 is designed. This component includes an inner partition 4-1 inside the feed box 2 to reasonably separate the feeding area from the crushing area. This provides temporary storage space for the raw materials and guides the raw materials to flow precisely into the crushing structure. Several long feed ports 4-5 on the surface of the inner partition 4-1 can control the amount of raw materials falling, preventing a large amount of raw materials from rushing into the crushing area at one time and causing blockage. At the same time, it ensures that the raw materials are evenly distributed on the surface of the rotating roller 4-2, thereby improving the crushing efficiency. Inside the feed box 2, a pair of horizontally rotating rollers 4-2 form a linkage structure with a belt via a transmission wheel 4-3. One of the rollers 4-2 is driven by electricity to rotate, and the other roller 4-2 is driven by the belt to rotate synchronously in the opposite direction. When the two rollers rotate in the opposite direction, the blades 4-4 on the surface can form a shearing force on the falling raw material, further cutting and crushing the blocky or coarse granular raw material.

[0025] The blade 4-4 slides and adheres to the inner surface of the inner partition 4-1, which can not only scrape off the raw material adhering to the surface of the inner partition 4-1 to prevent the raw material residue from clumping, but also form a closed crushing space to avoid raw material splashing during the crushing process and ensure thorough crushing.

[0026] The limiting function of the inner partition 4-1 ensures that the raw material is always within the cutting range of the double roller blade 4-4, preventing missed cutting due to roller rotation deviation. The synchronous rotation of the double rollers ensures uniform cutting force and avoids excessive local force that could cause wear of the blade 4-4 or uneven crushing of the raw material.

[0027] During operation, the raw material falls above the inner partition 4-1 and flows evenly to the rotating roller 4-2 through the feed inlet 4-5. The two rollers rotate in opposite directions, driving the blades 4-4 to crush the raw material. The crushed fine particles fall into the extrusion structure below. The linkage of the two rollers improves the crushing efficiency, and the inner partition 4-1 guides and ensures a uniform supply of raw material. All components work together to complete the fine crushing of the raw material, meeting the pretreatment requirements of raw materials before injection molding of rubber products.

[0028] like Figures 1-3As shown in the figure, the pusher assembly 5 in this embodiment includes a round rod 5-1, which is horizontally rotatably connected to the feed box 2. A transmission gear 5-2 is provided at one end of the round rod 5-1, and the transmission gear 5-2 is located on the outside of the feed box 2. A drive motor 5-3 is installed on the outside of the feed box 2. A transmission rack 5-4 is horizontally slidably connected to the outer surface of the feed box 2. The transmission rack 5-4 meshes with the transmission gear 5-2. A connecting frame 5-5 is provided at one end of the transmission rack 5-4. A rotating frame 5-6 is provided at the output end of the drive motor 5-3. A transmission rod 5-7 is rotatably connected to the rotating frame 5-6. The connection between the rotating frame 5-6 and the transmission rod 5-7 adopts an eccentric structure. The other end of the transmission rod 5-7 is rotatably connected to the connecting frame 5-5 through a pin. Several pusher rods 5-8 are provided at the bottom of the round rod 5-1.

[0029] In some examples, in order to achieve continuous flow of raw materials in the feed box 2, avoid blockage caused by stickiness or accumulation of raw materials, and ensure stable flow of raw materials to the crushing component 4, a pushing component 5 is designed. This component includes a round rod 5-1 in the feed box 2 to provide a mounting carrier for the pushing structure. Several pushing rods 5-8 at its bottom are evenly distributed along the length of the round rod 5-1, which can synchronously guide the raw materials in different areas of the feed box 2 and avoid local accumulation of raw materials.

[0030] The transmission gear 5-2 at one end of the round rod 5-1 meshes with the transmission rack 5-4 on the outside of the feed box 2, forming a power transmission structure. The horizontal movement of the rack can drive the gear to rotate, thereby making the round rod 5-1 and the push rod 5-8 rotate synchronously to realize the pushing action. The drive motor 5-3 on the outside of the feed box 2 forms an eccentric transmission mechanism through the rotating frame 5-6, the transmission rod 5-7 and the connecting frame 5-5. The drive motor 5-3 drives the rotating frame 5-6 to rotate. Because the connection between the rotating frame 5-6 and the transmission rod 5-7 is an eccentric structure, when the rotating frame 5-6 rotates, it will pull the connecting frame 5-5 and the transmission rack 5-4 to make horizontal reciprocating motion through the transmission rod 5-7. The reciprocating movement of the rack drives the transmission gear 5-2 to rotate forward and backward, which in turn causes the round rod 5-1 and the push rod 5-8 to swing back and forth. During the swinging process, the push rod 5-8 can repeatedly push the raw material in the feed box 2, breaking the arch bridge structure formed by the accumulation of raw materials. Especially for rubber raw materials with strong viscosity, it can effectively prevent them from sticking and clumping, and ensure that the raw material flows continuously through the feed port 4-5 of the inner partition 4-1 to the crushing component 4.

[0031] The stable output of the eccentric transmission structure ensures a uniform feeding frequency that matches the falling speed of the raw material, avoiding excessive feeding that causes splashing or excessive feeding that causes accumulation. The uniform distribution of the feeding rods 5-8 ensures that there are no dead corners in the feed box 2. The meshing transmission of the transmission gear 5-2 and the rack ensures accurate power transmission without slippage.

[0032] During operation, the drive motor 5-3 drives the eccentric structure to rotate, which in turn drives the round rod 5-1 and the push rod 5-8 to reciprocate through the rack and gear, pushing the raw material to flow into the crushing component 4. The reciprocating push prevents blockage, and the eccentric transmission ensures stability. All components work together to guide and supply the raw material, meeting the continuous raw material demand of the crushing component 4.

[0033] For example, such as Figure 3 As shown, the push rod 5-8 adopts a downward-opening V-shaped structure.

[0034] In some examples, the push rod 5-8 adopts a downward-opening V-shaped structure, which enhances the clamping and guiding ability of the raw material. The V-shaped opening can wrap around the raw material from both sides, preventing the raw material from slipping off the edge of the push rod 5-8 during pushing. This is especially effective for rubber raw materials with strong viscosity or uneven particle size, as it can push them more stably toward the feed port 4-5 of the inner partition 4-1.

[0035] For example, such as Figure 3 As shown, both ends of the bottom surface of the feed box 2 are inclined structural surfaces.

[0036] In some examples, the inclined structural surfaces at both ends of the bottom surface of the feed box 2 can guide the raw material to flow towards the middle area by gravity. Rubber raw materials tend to accumulate at both ends of the box due to their own stickiness or inter-particle friction. The inclined bottom surface can break this accumulation state, allowing the raw material to automatically converge towards the middle area where the feed inlet 4-5 is located, reducing the frequency of manual cleaning.

[0037] For example, such as Figure 3 As shown, the blade 4-4 is spirally coiled around the surface of the rotating roller 4-2.

[0038] In some examples, the blades 4-4 are spirally coiled around the surface of the rotating roller 4-2, enabling continuous cutting and conveying of the raw materials. As the spirally distributed blades 4-4 rotate, they not only exert a continuous shearing force on the falling raw materials, improving crushing efficiency, but also, through the guiding effect of the spiral, push the crushed fine particles towards the extrusion direction, preventing the crushed material from accumulating around the rotating roller 4-2.

[0039] In actual use: Rubber raw materials are put into the feed box 2, and the drive motor 5-3 of the pusher assembly 5 is started. The motor drives the rotating frame 5-6 to rotate. The eccentric rotating frame 5-6 pulls the connecting frame 5-5 and the transmission rack 5-4 to move horizontally back and forth through the transmission rod 5-7. The rack meshes with the transmission gear 5-2, which drives the round rod 5-1 and the V-shaped pusher rod 5-8 to swing back and forth, pushing the raw materials to converge in the middle of the feed box 2. The inclined inner bottom surface prevents the raw materials from accumulating and blocking. At the same time, the crushing assembly 4 is started. The electrically driven rotating roller 4-2 drives another rotating roller 4-2 to rotate synchronously in the opposite direction through the transmission wheel 4-3 and the belt. The spiral blade 4-4 cuts the raw materials when rotating. The blade 4-4 sticks to the inner partition 4-1 to scrape off the sticky raw materials. The raw materials fall evenly into the crushing area through the feed port 4-5 of the inner partition 4-1. The crushed fine particles of raw materials enter the main body 1 of the injection molding machine. The main body 1 of the injection molding machine injects the molten raw material into the mold through the extrusion sleeve 3 to complete the injection molding. The entire process realizes automatic material pushing to prevent blockage, fine crushing and stable injection, without the need for manual cleaning of blockages or pretreatment of raw materials.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. An injection molding machine for producing rubber products, characterized in that, include: The injection molding machine body (1) and the feed box (2) are connected to the top of the injection molding machine body (1); A pair of extrusion sleeves (3) and a pusher assembly (5) are provided. The extrusion sleeves (3) are fixedly mounted on the extrusion end of the injection molding machine body (1) by bolts, and the pusher assembly (5) is provided in the feed box (2). A crushing assembly (4) is disposed inside the feed box (2); The crushing assembly (4) includes an inner partition (4-1) which is disposed inside the feed box (2). Inside the feed box (2), a pair of rotating rollers (4-2) are connected by horizontal rotation. Each of the rotating rollers (4-2) is provided with a drive wheel (4-3) at one end. One of the rotating rollers (4-2) is driven to rotate by electricity. The drive wheels (4-3) are connected by belt drive.

2. The injection molding machine for producing rubber products according to claim 1, characterized in that, The rotating roller (4-2) has blades (4-4) arranged around its surface. The blades (4-4) slide against the inner surface of the inner partition (4-1). The inner partition (4-1) has several feed inlets (4-5) on its surface.

3. The injection molding machine for producing rubber products according to claim 1, characterized in that, The feeding assembly (5) includes a round rod (5-1), which is horizontally rotatably connected inside the feed box (2). One end of the round rod (5-1) is provided with a transmission gear (5-2), which is located outside the feed box (2). A drive motor (5-3) is installed outside the feed box (2).

4. The injection molding machine for producing rubber products according to claim 3, characterized in that, A transmission rack (5-4) is horizontally slidably connected to the outer surface of the feed box (2). The transmission rack (5-4) meshes with the transmission gear (5-2). A connecting frame (5-5) is provided at one end of the transmission rack (5-4). A rotating frame (5-6) is provided at the output end of the drive motor (5-3).

5. The injection molding machine for producing rubber products according to claim 4, characterized in that, A transmission rod (5-7) is rotatably connected to the rotating frame (5-6). The connection between the rotating frame (5-6) and the transmission rod (5-7) adopts an eccentric structure. The other end of the transmission rod (5-7) is rotatably connected to the connecting frame (5-5) via a pin. Several push rods (5-8) are provided at the bottom of the round rod (5-1).

6. The injection molding machine for producing rubber products according to claim 5, characterized in that, The push rod (5-8) adopts a downward-opening V-shaped structure.

7. The injection molding machine for producing rubber products according to claim 1, characterized in that, Both ends of the bottom surface of the feed box (2) are inclined structural surfaces.

8. The injection molding machine for producing rubber products according to claim 2, characterized in that, The blade (4-4) is spirally coiled around the surface of the rotating roller (4-2).

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