Demolding mechanism for injection molded part with inverted buckle and internal thread
By designing a mold release mechanism including moving mold, fixed mold and slidable inverter mold, the problem of traditional systems being difficult to deal with injection molded parts with internal thread and outer reverse locks at the same time is solved, and efficient mass production and cost reduction are achieved.
Patent Information
- Application Number
- CN202421441575.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-06-24
AI Technical Summary
Traditional mold release systems are difficult to deal with injection molded parts with internal threads and outer reverse buckles at the same time, especially in mass production, how to efficiently achieve simultaneous mold release of multiple water nozzles has become a problem.
A mold release mechanism including a moving die and fixed die set up and closing, and a horizontally sliding inverted mold is designed. The efficient sliding opening of the inverted mold is achieved through the cooperation of the inclined guide hole and the inclined guide column, and the synchronous rotation and lifting operation of the mold rod are ensured through the gear drive mechanism.
It realizes efficient mold release of internal threads and inverted in the same process, improves the efficiency of the production process, reduces production costs, and extends the service life of the mold.
Smart Images
Figure CN222875163U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of demoulding structures, in particular to a demoulding mechanism for injection molded parts with undercuts and internal threads. Background Art
[0002] As a commonly used component in water filtration equipment, the water spout of the water purifier needs to be manufactured with a structure with an internal threaded hole and an external reverse lock to achieve a spiral connection between the water spout and the water purifier body, and a sealing ring should be installed at the reverse lock to ensure sealing performance.
[0003] In traditional processes, the main structure of the faucet and the outer reverse lock are made through injection molding, and the internal threaded hole is often completed through post-processing, such as using drilling equipment, which not only increases the production cost, but also is a constraint on the improvement of production efficiency. If the faucet body, internal thread and outer reverse lock can be formed at one time during the injection molding process, the production efficiency will be significantly improved and the cost will be reduced. However, the separation of the mold after the injection molding process requires overcoming the internal thread structure and the outer reverse lock of the faucet at the same time. The traditional demoulding system is difficult to cope with this challenge, especially in the scenario of mass production. How to effectively realize the demoulding threads and reverse locks of multiple faucets at the same time has become a difficult problem that industry technicians urgently need to solve. Utility Model Content
[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a demoulding mechanism for injection molded parts with undercuts and internal threads. The demoulding mechanism adopts an innovative design to achieve efficient demoulding of multiple injection molded parts at the same time during the injection molding process, which not only ensures the integrity of the internal threads and undercuts after molding, but also significantly simplifies the production process. Through this structure, it can adapt to mass production needs, improve production efficiency, and reduce processing costs.
[0005] In order to solve the above problems, the utility model provides a demolding mechanism for injection molded parts with undercuts and internal threads, comprising a movable mold and a fixed mold which are opened and closed up and down, and an undercut mold which can be horizontally slidably arranged in the fixed mold, the movable mold can be lifted and moved and arranged on the top of the fixed mold, the fixed mold is provided with a plurality of mold cavities for molding the injection molded part body, the movable mold is provided with a plurality of mold rods whose lower ends correspond to the inserted mold cavities, the lower ends of the mold rods have a threaded structure for molding the threaded holes of the injection molded part, the mold rods can be rotatably lifted and arranged on the movable mold, one end of the undercut mold is connected to the mold cavity and has a plurality of flanges arranged corresponding to the mold cavity, the flanges are used for undercut molding of the injection molded part.
[0006] Compared with the prior art, the utility model is beneficial in that: the utility model is specially designed to meet the requirements of mass production, and through its integrated innovative demolding structure, while ensuring the precision and quality consistency of the injection molded parts, it achieves high-efficiency demolding of the internal thread and the undercut in the same process, greatly improving the efficiency of the production process; at the same time, the utility model has obvious advantages in cost control, and only needs to combine the injection molding machine and the demolding mechanism to complete the overall molding of the injection molded part body, threaded holes and undercuts in one step. This design avoids subsequent processing steps such as drilling, greatly reduces the demand for additional equipment and operation time, and greatly reduces production costs; in addition, thanks to the threaded structure of the mold rod in the utility model that is exquisitely matched with the threaded hole of the injection molded part, the mold rod can easily detach from the threaded hole of the injection molded part without the need for auxiliary lifting equipment during rotation, further optimizing the mechanical structure of the demolding device.
[0007] Specifically, an inclined guide hole is provided on the undercut mold, and an inclined guide column corresponding to the inclined guide hole is provided on the movable mold. The lower end of the inclined guide column is inserted into the inclined guide hole, and is used to drive the undercut mold to slide and open when the movable mold rises and opens relative to the fixed mold. After applying this structure, during the demoulding process of the injection molded part, the ingenious cooperation of the inclined guide hole and the inclined guide column can accurately control the sliding trajectory of the undercut mold, ensuring that the movable mold can drive the undercut mold to open efficiently and smoothly during the rising process, thereby realizing the rapid demoulding of the undercut injection molded part. This design simplifies the operation steps, improves the accuracy and efficiency of demoulding, and also reduces the direct contact and friction between mechanical parts, prolongs the service life of the mold, and reduces production costs.
[0008] Specifically, each mold bar is provided with a driven gear at the upper end, and the movable mold is provided with a gear drive mechanism for driving multiple driven gears to rotate synchronously. After applying this structure, the gear drive mechanism, together with multiple driven gears, can ensure that multiple mold bars are synchronously and accurately screwed out of the threaded holes of the injection molded parts during simultaneous rotation. Compared with other drive schemes, this gear meshing transmission method greatly improves the accuracy of movement and the stability of the system. At the same time, the integrated lifting and lowering operation during the mold bar screwing out simplifies the device structure and reduces the mold load. In addition, the gears are meshed through a spline structure to ensure that the mold bars are accurately raised while rotating, optimize the entire demoulding process, take into account the complementary functions of rotation and lifting, and enhance the stability and reliability of the overall device.
[0009] Specifically, the gear drive mechanism includes a driving member, a driving gear and a plurality of auxiliary gears. The driving member is arranged on the movable mold and the output end thereof is equipped with a driving gear. The plurality of auxiliary gears are arranged on the movable mold and rotate around an axis and meshedly connected between the driving gear and the driven gear. After applying this structure, the uniformity and accuracy of power transmission are ensured by the driving member and the driving gear arranged on the movable mold, and the auxiliary gears meshed therewith. This layout not only optimizes the stability of power output, but also reduces the structural complexity and mechanical wear of the device due to the direct meshing between the gears, thereby improving the production efficiency while enhancing the reliability and durability of the entire system. In addition, the structure of arranging a plurality of auxiliary gears between the driving gear and the driven gear ensures that one driving gear can drive a plurality of driven gears to rotate at the same time, thereby reducing the use of driving members.
[0010] As an improvement, a mold frame and a plurality of through holes corresponding to the mold cavity are provided at the bottom of the fixed mold, a lifting and moving ejector plate is provided in the mold frame, a plurality of ejector posts corresponding to the mold cavity are provided at the top of the ejector plate, the ejector posts are inserted into the mold cavity through the through holes, and the outer peripheral walls of the ejector posts are sealed with the cavity wall of the mold cavity. After the injection molded part is demolded, it can be efficiently and smoothly ejected from the mold cavity with the help of the lifting and lowering action of the ejector plate and the precise positioning of the ejector posts, which greatly improves the production efficiency and optimizes the accuracy of demolding.
[0011] As an improvement, a plurality of straight guide pins are provided at the bottom of the fixed mold, and a plurality of through holes are provided on the ejector plate that penetrate the plate surface from top to bottom. The straight guide pins are correspondingly inserted into the through holes and the lower ends of the straight guide pins have an anti-slip structure. A spring is sleeved on the straight guide pins, and the two ends of the spring abut between the top of the ejector plate and the bottom of the fixed mold. After applying this structure, the straight guide pins and the springs constitute an elastic reset mechanism. When the ejector plate drives the ejector pin to rise and eject the injection molded part out of the mold cavity, the elastic reset mechanism has a buffering effect, preventing the injection molded part from being subjected to a large impact force, and has the function of protecting the product. After the injection molded part is ejected out of the mold cavity, the spring's rebound force is used to help the ejector pin return to its initial position quickly and smoothly, preparing for the next round of operations. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a top view of the utility model;
[0013] Figure 2 for Figure 1 Sectional view along line AA;
[0014] Figure 3 for Figure 1 Sectional view along line BB;
[0015] Figure 4 This is a three-dimensional diagram of the utility model after removing part of the mold frame.
[0016] Description of reference numerals:
[0017] 1. Moving mold; 11. Mold bar; 12. Oblique guide pin; 2. Fixed mold; 20. Mold cavity; 21. Through hole; 3. Inverted mold; 30. Flange; 31. Oblique guide hole; 4. Driven gear; 5. Gear drive mechanism; 51. Driving member; 52. Driving gear; 53. Auxiliary gear; 6. Mold frame; 61. Ejector plate; 62. Ejector pin; 71. Straight guide pin; 72. Through hole; 73. Spring. DETAILED DESCRIPTION
[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0019] like Figure 1 and Figure 2 As shown, in the utility model, the demoulding mechanism for injection molded parts with undercuts and internal threads comprises a movable mold 1 and a fixed mold 2 which are opened and closed up and down, and an undercut mold 3 which can be horizontally slidably arranged in the fixed mold 2, the movable mold 1 can be lifted and moved on the top of the fixed mold 2, the fixed mold 2 is provided with a plurality of mold cavities 20 for molding the injection molded part body, the movable mold 1 is provided with a plurality of mold rods 11 whose lower ends correspond to the inserted mold cavities 20, the lower ends of the mold rods 11 have a threaded structure for molding the threaded holes of the injection molded part, the mold rods 11 can be rotatably lifted and arranged on the movable mold 1, one end of the undercut mold 3 is connected to the mold cavity 20 and has a plurality of flanges 30 arranged corresponding to the mold cavity 20, the flanges 30 are used for undercut molding of the injection molded part.
[0020] The utility model is specially designed to meet the requirements of mass production. Through its integrated innovative demoulding structure, while ensuring the precision and quality consistency of the injection molded parts, it realizes high-efficiency demoulding of the internal thread and the undercut in the same process, greatly improving the efficiency of the production process; at the same time, the utility model has obvious advantages in cost control. Only by combining the injection molding machine and the demoulding mechanism, the overall molding of the injection molded part body, the threaded hole and the undercut can be completed in one step. This design avoids subsequent processing steps such as drilling, greatly reduces the demand for additional equipment and operation time, and greatly reduces production costs; in addition, thanks to the threaded structure of the mold rod 11 of the utility model that is exquisitely matched with the threaded hole of the injection molded part, the mold rod 11 can easily detach from the threaded hole of the injection molded part without the need for auxiliary lifting equipment during rotation, further optimizing the mechanical structure of the demoulding device.
[0021] like Figure 3As shown, an inclined guide hole 31 is provided on the undercut mold 3, and an inclined guide column 12 corresponding to the inclined guide hole 31 is provided on the movable mold 1. The lower end of the inclined guide column 12 is inserted into the inclined guide hole 31, and is used to drive the undercut mold 3 to slide open when the movable mold 1 rises and opens relative to the fixed mold 2. After applying this structure, during the demoulding process of the injection molded part, the ingenious cooperation between the inclined guide hole 31 and the inclined guide column 12 can accurately control the sliding trajectory of the undercut mold 3, ensuring that the movable mold 1 can drive the undercut mold 3 to open efficiently and smoothly during the rising process, thereby realizing the rapid demoulding of the undercut of the injection molded part. This design simplifies the operation steps, improves the accuracy and efficiency of demoulding, and also reduces the direct contact and friction between mechanical parts, prolongs the service life of the mold, and reduces the production cost.
[0022] like Figure 1 , Figure 2 and Figure 4 As shown, a driven gear 4 is provided at the upper end of each mold rod 11, and a gear driving mechanism 5 for driving multiple driven gears 4 to rotate synchronously is provided on the movable mold 1. After applying this structure, the gear driving mechanism 5, together with multiple driven gears 4, can ensure that multiple mold rods 11 are synchronously and accurately screwed out of the threaded holes of the injection molded parts during simultaneous rotation. Compared with other driving schemes, this gear meshing transmission method greatly improves the accuracy of movement and the stability of the system. At the same time, the integrated lifting and lowering operation during the screwing out of the mold rod 11 simplifies the device structure and reduces the mold load. In addition, the gears are meshed through a spline structure, which ensures that the mold rod 11 rises accurately while rotating, optimizes the entire demoulding process, takes into account the complementary functions of rotation and lifting, and enhances the stability and reliability of the overall device.
[0023] like Figure 4As shown, the gear drive mechanism 5 includes a driving member 51, a driving gear 52 and a plurality of auxiliary gears 53. The driving member 51 is arranged on the movable mold 1 and the driving gear 52 is installed at its output end. The plurality of auxiliary gears 53 are arranged on the movable mold 1 to rotate around the axis and meshedly connected between the driving gear 52 and the driven gear 4. The driving member 51 is a motor or other driving device that can drive the driving gear 52 to rotate. Usually, there are four mold bars 11, and there are two auxiliary gears 53. One auxiliary gear 53 drives the driven gears 4 on two mold bars 11 to rotate. At the same time, the two auxiliary gears 53 mesh with one driving gear 52 for transmission. For the convenience of gear installation and the need of space avoidance, an additional auxiliary gear 53 can also be added between the two auxiliary gears 53 and one driving gear 52 as a transition, and the transmission of the rotational force between the driving gear 52 and the two auxiliary gears 53 is completed by means of the transition gear. After applying this structure, the uniformity and accuracy of power transmission are ensured by the driving member 51 and the driving gear 52 arranged on the movable mold 1, and the auxiliary gear 53 meshing therewith. This layout not only optimizes the stability of power output, but also reduces the structural complexity and mechanical wear of the device due to the direct meshing between the gears, thereby improving production efficiency while enhancing the reliability and durability of the entire system. In addition, a structure in which multiple auxiliary gears 53 are arranged between the driving gear 52 and the driven gear 4 ensures that one driving gear 52 can drive multiple driven gears 4 to rotate at the same time, thereby reducing the use of the driving member 51.
[0024] like Figure 2 and 4 As shown, the bottom of the fixed mold 2 is provided with a mold frame 6 and a plurality of through holes 21 corresponding to the mold cavity 20, and a lift plate 61 that can be lifted and moved is provided inside the mold frame 6. A plurality of ejector posts 62 corresponding to the mold cavity 20 are provided on the top of the ejector post 61. The ejector posts 62 are inserted into the mold cavity 20 through the through holes 21, and the outer peripheral walls of the ejector posts 62 are sealed with the cavity wall of the mold cavity 20. After the injection molded part is demolded, it can be efficiently and smoothly ejected from the mold cavity 20 by means of the up and down lifting action of the ejector plate 61 and the precise positioning of the ejector posts 62, which greatly improves the production efficiency and optimizes the demolding accuracy.
[0025] like Figure 4As shown, the bottom of the fixed mold 2 is provided with a plurality of straight guide posts 71, and the ejector plate 61 is provided with a plurality of through holes 72 that penetrate the plate surface from top to bottom. The straight guide posts 71 are correspondingly inserted into the through holes 72, and the lower end of the straight guide posts 71 has an anti-slip structure. The straight guide posts 71 are sleeved with springs 73, and the two ends of the springs 73 abut between the top of the ejector plate 61 and the bottom of the fixed mold 2. After the structure is applied, the straight guide posts 71 and the springs 73 constitute an elastic reset mechanism. When the ejector plate 61 drives the ejector post 62 to rise and eject the injection molded part out of the mold cavity 20, the elastic reset mechanism has a buffering effect, preventing the injection molded part from being subjected to a large impact force, and has the function of protecting the product. After the injection molded part is ejected out of the mold cavity 20, the rebound force of the spring 73 is used to help the ejector post 62 return to the initial position quickly and smoothly, so as to prepare for the next round of operation.
[0026] After the injection molded part is formed, the steps for completing the demoulding operation using the utility model are as follows:
[0027] Step A: The driving member 51 drives the driving gear 52 to rotate, and the driving gear 52 drives the multiple driven gears 4 to rotate through the meshing transmission of the auxiliary gear 53, that is, the multiple mold rods 11 rotate simultaneously; while the mold rods 11 rotate, the threaded mechanism at the lower end thereof is used to screw out from the threaded hole of the injection molded part;
[0028] Step B: The movable mold 1 is driven by an external force to rise, and at the same time, the inclined guide pillar 12 is driven to rise. At the same time, the inclined guide pillar 12 cooperates with the inclined guide hole 31 to drive the undercut mold 3 to slide horizontally away from the mold cavity 20, so that the undercut mold 3 is separated from the undercut of the injection molded part;
[0029] Step C: The ejector plate 61 rises under the action of external force and drives the ejector column 62 to rise synchronously. After the ejector column 62 rises to eject the injection molded part upward from the corresponding mold cavity 20, the ejector column 62 descends and resets under the action of the rebound force of the spring 73.
[0030] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.
Claims
1. A demoulding mechanism for an injection molded part with an undercut and an internal thread, comprising a movable mold (1) and a fixed mold (2) which are arranged to open and close up and down, and an undercut mold (3) which is horizontally slidable in the fixed mold (2), characterized in that: The movable mold (1) is movable and can be raised and lowered and is arranged on the top of the fixed mold (2); the fixed mold (2) is provided with a plurality of mold cavities (20) for molding the main body of the injection molded part; the movable mold (1) is provided with a plurality of mold rods (11) whose lower ends are correspondingly inserted into the mold cavities (20); the lower ends of the mold rods (11) have threaded structures for molding threaded holes of the injection molded part; the mold rods (11) are rotatably raised and lowered on the movable mold (1); one end of the undercut mold (3) is connected to the mold cavity (20) and has a plurality of flanges (30) arranged corresponding to the mold cavity (20); the flanges (30) are used for undercut molding of the injection molded part.
2. The demoulding mechanism for injection molded parts with undercuts and internal threads according to claim 1, characterized in that: The undercut mold (3) is provided with an inclined guide hole (31), and the movable mold (1) is provided with an inclined guide column (12) corresponding to the inclined guide hole (31). The lower end of the inclined guide column (12) is inserted into the inclined guide hole (31) and is used to drive the undercut mold (3) to slide open when the movable mold (1) rises and opens relative to the fixed mold (2).
3. The demoulding mechanism for injection molded parts with undercuts and internal threads according to claim 1, characterized in that: A driven gear (4) is provided at the upper end of each mold rod (11), and a gear driving mechanism (5) for driving a plurality of driven gears (4) to rotate synchronously is provided on the movable mold (1).
4. The demoulding mechanism for injection molded parts with undercuts and internal threads according to claim 3, characterized in that: The gear drive mechanism (5) comprises a driving member (51), a driving gear (52) and a plurality of auxiliary gears (53); the driving member (51) is arranged on the movable mold (1) and the driving gear (52) is mounted on the output end of the driving member (51); the plurality of auxiliary gears (53) are arranged on the movable mold (1) so as to rotate around an axis and are meshedly connected between the driving gear (52) and the driven gear (4).
5. The demoulding mechanism for injection molded parts with undercuts and internal threads according to claim 1, characterized in that: The bottom of the fixed mold (2) is provided with a mold frame (6) and a plurality of through holes (21) corresponding to the mold cavity (20); a liftable ejector plate (61) is provided inside the mold frame (6); a plurality of ejector posts (62) corresponding to the mold cavity (20) are provided on the top of the ejector plate (61); the ejector posts (62) are inserted into the mold cavity (20) via the through holes (21), and the outer peripheral walls of the ejector posts (62) are sealed with the cavity wall of the mold cavity (20).
6. The demoulding mechanism for injection molded parts with undercuts and internal threads according to claim 5, characterized in that: A plurality of straight guide pillars (71) are provided at the bottom of the fixed mold (2); a plurality of through holes (72) penetrating the plate surface from top to bottom are provided on the ejector plate (61); the straight guide pillars (71) are correspondingly inserted into the through holes (72); and the lower ends of the straight guide pillars (71) have an anti-slip structure; a spring (73) is sleeved on the straight guide pillars (71); and both ends of the spring (73) abut between the top of the ejector plate (61) and the bottom of the fixed mold (2).