Slide core-pulling structure
The step-by-step demolding core-pulling structure solves the problems of difficult demolding of inserts and damage to finished products in injection molds, and realizes the smooth extraction of inserts and protection of finished products.
Patent Information
- Application Number
- CN202520317173.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The insert structure in existing injection molds is difficult to demold and can easily damage the finished product.
The slide core-pulling structure adopts a step-by-step demolding method. Through the coordinated design of lifting blocks, first slide, second slide, inclined rod and insert pin, the insert pin can be pulled out step by step, which reduces the demolding difficulty and avoids damage to the finished product.
It effectively reduces demolding difficulty, avoids damage to injection molded products, and ensures smooth demolding of finished products.
Smart Images
Figure CN223790955U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mold technology, specifically relating to a core-pulling structure for a sliding position. Background Technology
[0002] In injection mold design, the slide (also known as a slider or side core-pulling mechanism) is a key component. The inner wall of the slide not only forms part of the injection cavity, but its design is also crucial to ensuring smooth demolding of the finished product. When the mold is closed, the slide, together with other mold components, forms a sealed space—the injection cavity—where plastic material is injected and solidifies.
[0003] In some complex injection-molded product designs, it may be necessary to form structures such as holes or grooves inside the part. To achieve this, inserts (also known as cores or pins) are specially designed during the mold design phase. These inserts are typically mounted on slides, and their positions and shapes are precisely calculated to ensure that the required holes or grooves can be accurately formed during the injection molding process.
[0004] However, this design presents a challenge: during demolding, the insert must be able to be pulled cleanly and efficiently out of the newly formed hole, while the slide must also move accordingly to facilitate the product's release from the mold. During this process, the shrinkage of the plastic material upon cooling may generate a certain clamping force, causing the insert to become tightly embedded in the hole, thus increasing the difficulty of demolding. If this clamping force is too great, it may lead to incomplete demolding or damage to the finished product. Utility Model Content
[0005] To address the aforementioned technical problems, this utility model provides a sliding core-pulling structure to solve the problems of difficult demolding and demolding damage in existing injection molds with insert structures. This sliding core-pulling structure can demold in stages, reducing demolding difficulty and avoiding damage to the injection molded product.
[0006] This utility model provides a sliding core-pulling structure, including a lifting block, a first sliding position, a second sliding position, a diagonal rod, and a pin. The first sliding position is horizontally slidably disposed on the second sliding position. The pin extends horizontally, with one end fixed to the first sliding position and the other end slidably passing through the second sliding position. The second sliding position has a vertically penetrating and horizontally extending strip-shaped hole. The first sliding position has a vertically penetrating circular hole. The top end of the diagonal rod is fixed to the lifting block, and the bottom end of the diagonal rod passes obliquely downward through the circular hole and the strip-shaped hole. The lifting block can be positioned at a first position... The second and third positions rise sequentially. When the lifting block is in the first position, the inclined rod is located at one end of the strip hole. During the process of the lifting block rising from the first position to the second position, the second sliding position remains stationary, and the inclined rod slides from one end of the strip hole to the other end of the strip hole. The cooperation between the inclined rod and the circular hole causes the first sliding position to slide horizontally relative to the second sliding position, and the first sliding position causes the insert pin to slide relative to the second sliding position. During the process of the lifting block rising from the second position to the third position, the inclined rod causes the first sliding position and the second sliding position to slide horizontally simultaneously.
[0007] Furthermore, a stop block is provided on one side of the bottom of the lifting block, and the side of the second moving position abuts against the side wall of the stop block.
[0008] Furthermore, there are multiple inserts, which are arranged in parallel at intervals on one side of the first row.
[0009] In this core-pulling structure, the second slide is the slide that directly contacts the injection-molded product. During demolding, the lifting block rises from the first position to the second position, and the inclined rod slides from one end of the strip hole to the other end. At this time, the second slide remains stationary, thus maintaining a constant position between the second slide and the injection-molded product. The engagement of the inclined rod with the circular hole causes the first slide to slide horizontally relative to the second slide. The first slide causes the insert pin to slide relative to the second slide, thereby releasing and removing the insert pin from the injection-molded product. During the process of the lifting block rising from the second position to the third position, the inclined rod causes the first and second slides to slide horizontally simultaneously, separating the second slide from the injection-molded product. This achieves the effect of first removing the insert pin and then disengaging it from the second slide, effectively reducing demolding difficulty and avoiding damage to the injection-molded product. Attached Figure Description
[0010] 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.
[0011] Figure 1 This is a schematic diagram of a row-position core-pulling structure;
[0012] Figure 2 This is a cross-sectional view of a row-position core-pulling structure. Detailed Implementation
[0013] This utility model discloses a sliding core-pulling structure, which can perform demolding in stages, reducing demolding difficulty and avoiding damage to injection molded products.
[0014] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0015] See Figure 1 and Figure 2As shown, this utility model discloses a sliding core-pulling structure, including a lifting block 1, a first sliding position 4, a second sliding position 5, a diagonal rod 3, and an insert pin 8. The first sliding position 4 is horizontally slidably disposed on the second sliding position 5. The insert pin 8 extends horizontally, with one end fixed to the first sliding position 4 and the other end slidably passing through the second sliding position 5. The second sliding position 5 has a vertically penetrating and horizontally extending strip-shaped hole 6, and the first sliding position 4 has a vertically penetrating circular hole 7. The top end of the diagonal rod 3 is fixed to the lifting block 1, and the bottom end of the diagonal rod 3 passes obliquely downward through the circular hole 7 and the strip-shaped hole 6. The lifting block 1 can slide horizontally on the first sliding position 4. The lifting block 1 rises sequentially from the first position to the second position and then to the third position. When the lifting block 1 is in the first position, the inclined rod 3 is located at one end of the strip hole 6. During the process of the lifting block 1 rising from the first position to the second position, the second sliding position 5 remains stationary, and the inclined rod 3 slides from one end of the strip hole 6 to the other end. The cooperation between the inclined rod 3 and the circular hole 7 causes the first sliding position 4 to slide horizontally relative to the second sliding position 5. The first sliding position 4 causes the insert pin 8 to slide relative to the second sliding position 5. During the process of the lifting block 1 rising from the second position to the third position, the inclined rod 3 causes the first sliding position 4 and the second sliding position 5 to slide horizontally simultaneously.
[0016] A stop block 2 is provided on one side of the bottom of the lifting block 1, and the side of the second moving position 5 abuts against the side wall of the stop block 2.
[0017] The number of the inserts 8 is multiple, and the multiple inserts 8 are arranged in parallel at intervals on one side of the first row position 4.
[0018] In this core-pulling structure, the second slide 5 is the slide that directly contacts the injection-molded product. During demolding, the lifting block 1 rises from the first position to the second position, and the inclined rod 3 slides from one end of the strip hole 6 to the other end. At this time, the second slide 5 remains stationary, thus maintaining a constant position between the second slide 5 and the injection-molded product. The cooperation between the inclined rod 3 and the circular hole 7 causes the first slide 4 to slide horizontally relative to the second slide 5. The first slide 4 causes the insert pin 8 to slide relative to the second slide 5, thereby releasing and removing the insert pin 8 from the injection-molded product. During the process of the lifting block 1 rising from the second position to the third position, the inclined rod 3 causes the first slide 4 and the second slide 5 to slide horizontally simultaneously, causing the second slide 5 to separate from the injection-molded product. This achieves the effect of first removing the insert pin 8 and then removing it from the second slide 5, effectively reducing the demolding difficulty and avoiding damage to the injection-molded product.
[0019] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.
Claims
1. A core pulling structure, characterized by, The device comprises a lifting block, a first row, a second row, a slanted rod and a pin, the first row is horizontally slidably arranged on the second row, the pin is horizontally arranged, one end of the pin is fixed on the first row, the other end of the pin is slidably arranged through the second row, the second row is provided with a strip hole extending horizontally and vertically, the first row is provided with a circular hole extending vertically, the top end of the slanted rod is fixed on the lifting block, the bottom end of the slanted rod is sequentially arranged through the circular hole and the strip hole, the lifting block can be sequentially lifted at a first position, a second position and a third position, when the lifting block is at the first position, the slanted rod is at one end of the strip hole, during the lifting of the lifting block from the first position to the second position, the second row keeps the position unchanged, the slanted rod is slid from one end of the strip hole to the other end of the strip hole, the slanted rod drives the first row to slide horizontally relative to the second row in cooperation with the circular hole, the first row drives the pin to slide relative to the second row, during the lifting of the lifting block from the second position to the third position, the slanted rod drives the first row and the second row to slide horizontally at the same time.
2. A core pulling structure according to claim 1, wherein The bottom side of the lifting block is provided with a stop block, the side surface of the second row abuts against the side wall of the stop block.
3. The row core structure according to claim 1, wherein, The number of the pins is multiple, the multiple pins are arranged in parallel and at intervals on one side of the first row.