Plastic shell forming equipment with automatic trimming function
The plastic shell molding equipment with automatic trimming function solves the problem of injection hole residue by using a drive mechanism and a rotary grinding head, realizing automated trimming and grinding, and improving production efficiency and product quality.
Patent Information
- Application Number
- CN202423085227.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing plastic shell molding equipment is prone to producing injection hole residue during the injection molding process, resulting in protruding parts on the side of the product that need to be manually cut or ground, which reduces production efficiency.
Design a plastic shell molding equipment with automatic trimming function. The equipment uses a drive mechanism to drive a push rod to extend into the injection hole to push out residual solution, and uses a rotating grinding head to automatically grind off the excess parts, thus achieving automatic trimming.
It improves production efficiency, avoids the need for manual handling of injection hole residue, and ensures product quality and production efficiency.
Smart Images
Figure CN223545695U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic shell molding technology, specifically to a plastic shell molding equipment with automatic trimming function. Background Technology
[0002] Plastic shells refer to the outer casings of products made of plastic materials, commonly used in electronics, household goods, toys, and other fields. The molding of plastic shells involves using molds. Molded solution is injected into the mold cavity through injection holes. After the product cools, residue can easily remain in the injection holes, causing large protrusions on the sides of the product. This necessitates workers cutting or grinding these protrusions after the product is removed, thus reducing work efficiency. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to provide a plastic shell molding equipment with automatic trimming function, which can automatically eject the residual solution in the injection hole and has an automatic polishing function, so as to solve the problems mentioned in the background art.
[0004] This utility model is achieved through the following technical solution: a plastic shell molding device with automatic trimming function, including a mold, an injection channel is provided on one side of the mold, one end of the injection channel narrows to form an injection hole communicating with the upper cavity of the mold, an injection tube communicating with the injection channel is installed on the outer side of the mold, the curved part of the injection tube protrudes to form a thickened part, the center of the thickened part is provided with a shaft hole communicating with the injection channel, a push rod is provided in the shaft hole, one end of the push rod is set close to the injection hole and is equipped with a grinding head, the other end of the push rod extends to the outside and is equipped with a drive mechanism to drive the push rod to move and rotate axially, and an annular channel is formed between the push rod and the injection channel.
[0005] As a preferred technical solution, the drive mechanism includes a cylinder, a motor, gears, a fixed housing, and bearings. The bearings are installed inside the fixed housing, and a retaining ring is installed in the inner ring of the bearings. One exposed end of the push rod is threaded into the retaining ring. A portion of the retaining ring protrudes from the fixed housing and has multiple protruding teeth installed in a ring structure. The gears are meshed with the protruding teeth. The motor is installed on the fixed housing, and the motor shaft is fixedly connected to the gears. The piston rod of the cylinder is installed on the outer end face of the fixed housing through a connecting flange.
[0006] As a preferred technical solution, a fixing frame is installed on the outside of the drive mechanism, and one end of the fixing frame is fixed to the mold by bolts.
[0007] As a preferred technical solution, the fixed ring has multiple ball grooves in a ring structure on the end face away from the cylinder. A ball is movably installed in each ball groove, and a part of the ball extends to the outside through the opening of the ball groove.
[0008] As a preferred technical solution, the inner wall of the shaft hole facing the outside is enlarged outward, and a sealing ring is installed in the enlarged opening of the shaft hole, with the inner ring surface of the sealing ring contacting the outer ring surface of the push rod.
[0009] As a preferred technical solution, one end of the grinding head is set in parallel, and grinding patterns are provided on the parallel end face.
[0010] The beneficial effects of this utility model are: This utility model has a simple structure. The drive mechanism can drive the push rod to extend towards the mold cavity, thereby pushing the residual solution in the injection hole into the interior of the mold cavity, avoiding the formation of a large protrusion. The push rod can also rotate, and the rotation of the push rod drives the grinding head. The grinding head can tear the part that is stuck to the product and grind the excess part to increase production efficiency. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 2 This is a side view of the present invention;
[0014] Figure 3 This is a bottom view of the present invention;
[0015] Figure 4 This is a cross-sectional view of the present invention.
[0016] Among them, 1. mold; 2. injection tube; 3. thickened part; 4. push rod; 5. protruding tooth; 6. fixed shell; 7. cylinder; 8. fixed frame; 9. fixed ring; 10. ball; 11. bearing; 12. injection hole; 13. gear; 14. motor; 15. sealing ring; 16. injection channel; 17. grinding head. Detailed Implementation
[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0018] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0019] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses a plastic shell molding device with automatic trimming function, including a mold 1. An injection channel 16 is provided on one side of the mold 1. One end of the injection channel 16 narrows to form an injection hole 12 communicating with the upper cavity of the mold 1. An injection tube 2 communicating with the injection channel 16 is installed on the outer side of the mold 1. A thickened portion 3 protrudes from the bend of the injection tube 2. A shaft hole communicating with the injection channel 16 is provided at the center of the thickened portion 3. A push rod 4 is provided in the shaft hole. One end of the push rod 4 is positioned close to the injection hole 12 and is equipped with a grinding head 17. The other end of the push rod 4 extends to the outside and is equipped with a drive mechanism that drives the push rod 4 to move and rotate axially. An annular channel is formed between the push rod 4 and the injection channel 16, allowing the injected plastic solution to pass through the annular channel and preventing blockage.
[0021] In this embodiment, the drive mechanism includes a cylinder 7, a motor 14, a gear 13, a fixed housing 6, and a bearing 11. The bearing 11 is installed inside the fixed housing 6, and a fixed ring 9 is installed in the inner ring of the bearing 11. The exposed end of the push rod 4 is threaded into the fixed ring 9. A part of the fixed ring 9 protrudes from the fixed housing 6 and has multiple protruding teeth 5 installed in a ring structure. The gear 13 is meshed with the protruding teeth 5. The motor 14 is installed on the fixed housing 6, and the shaft of the motor 14 is fixedly connected to the gear 13. The piston rod of the cylinder 7 is installed on the outer end face of the fixed housing 6 through a connecting flange.
[0022] In this embodiment, a fixing frame 8 is installed on the outside of the drive mechanism, and one end of the fixing frame 8 is fixed to the mold 1 by bolts;
[0023] After the piston rod of the cylinder retracts, the push rod and the grinding head can extend directly from the shaft hole, making it convenient for inspection and replacement.
[0024] In this embodiment, the fixed ring 9 has a ring-shaped structure with multiple ball grooves on the end face away from the cylinder 7. A ball 10 is movably installed in each ball groove, and a part of the ball 10 extends to the outside along the opening of the ball groove.
[0025] In this embodiment, the inner wall of the shaft hole facing the outside is enlarged outward, and a sealing ring 15 is installed in the enlarged opening of the shaft hole. The inner ring surface of the sealing ring 15 is in contact with the outer ring surface of the push rod 4. The sealing ring increases the sealing between the push rod and the shaft hole, preventing external leakage.
[0026] In this embodiment, one end of the grinding head 17 is arranged in parallel, and grinding patterns are provided on the parallel end face. The excess part can be quickly ground off by the friction between the grinding patterns and the product.
[0027] The external plastic solution enters the mold cavity through the injection tube, injection channel and injection hole. After injection is completed, the cylinder can be activated to extend the piston rod of the cylinder. The movement of the piston rod pushes the fixed shell, bearing, fixed ring and push rod, so that one end of the push rod can be inserted into the injection hole and push the internal residual plastic solution into the mold cavity to avoid residue.
[0028] As the product cools and solidifies, the motor can be started. The motor starts and drives the gears. The rotation of the gears drives the convex teeth and the retaining ring, causing the retaining ring to rotate along the bearing. The rotation of the retaining ring drives the push rod and the grinding head. Since there will inevitably be gaps between the grinding head and the injection hole, the plastic solution can enter the gaps. Therefore, the rotating grinding head can tear the adhered parts and grind them flat to ensure the subsequent quality of the product.
[0029] In this process, after the piston rod of the cylinder extends, the ball on the final fixed ring will contact the end face of the thickened part, thereby limiting its movement and ensuring that the end face of the grinding head is flush with the inner wall of the mold cavity. The rolling of the ball reduces the friction between the fixed ring and the thickened part, allowing the motor to better drive the rotation of the push rod.
[0030] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.
Claims
1. A plastic shell molding equipment with automatic trimming function, characterized in that: The mold (1) includes an injection channel (16) on one side of the mold (1). One end of the injection channel (16) narrows to form an injection hole (12) that communicates with the upper cavity of the mold (1). An injection tube (2) that communicates with the injection channel (16) is installed on the outer side of the mold (1). A thickened part (3) is formed by the bend of the injection tube (2). A shaft hole that communicates with the injection channel (16) is provided at the center of the thickened part (3). A push rod (4) is provided in the shaft hole. One end of the push rod (4) is set close to the injection hole (12) and is equipped with a grinding head (17). The other end of the push rod (4) extends to the outside and is equipped with a drive mechanism that drives the push rod (4) to move and rotate axially. An annular channel is formed between the push rod (4) and the injection channel (16).
2. The plastic shell molding equipment with automatic trimming function according to claim 1, characterized in that: The drive mechanism includes a cylinder (7), a motor (14), a gear (13), a fixed housing (6), and a bearing (11). The bearing (11) is installed inside the fixed housing (6). A retaining ring (9) is installed in the inner ring of the bearing (11). The exposed end of the push rod (4) is threaded into the retaining ring (9). A part of the retaining ring (9) protrudes from the fixed housing (6) and has multiple protruding teeth (5) installed in a ring structure. The gear (13) is meshed with the protruding teeth (5). The motor (14) is installed on the fixed housing (6). The rotating shaft of the motor (14) is fixedly connected to the gear (13). The piston rod of the cylinder (7) is installed on the outer end face of the fixed housing (6) through a connecting flange.
3. The plastic shell molding equipment with automatic trimming function according to claim 2, characterized in that: A fixed frame (8) is installed on the outside of the drive mechanism, and one end of the fixed frame (8) is fixed to the mold (1) by bolts.
4. The plastic shell molding equipment with automatic trimming function according to claim 2, characterized in that: The fixed ring (9) has a ring structure with multiple ball grooves on the end face away from the cylinder (7). A ball (10) is movably installed in each ball groove, and a part of the ball (10) extends to the outside through the opening of the ball groove.
5. The plastic shell molding equipment with automatic trimming function according to claim 1, characterized in that: The inner wall of the shaft hole facing the outside is enlarged outward, and a sealing ring (15) is installed in the enlarged opening of the shaft hole. The inner ring surface of the sealing ring (15) is in contact with the outer ring surface of the push rod (4).
6. The plastic shell molding equipment with automatic trimming function according to claim 1, characterized in that: One end of the grinding head (17) is set in parallel, and grinding patterns are provided on the parallel end face.