Core pulling mechanism of elbow injection mold
By designing a core extraction mechanism including straight sliders, curved inserts, swing arms and guide structures, the problems of complex and costly core extraction structure of existing bent pipe injection molds are solved, and simple, low cost and high efficiency are achieved. core extraction operation.
Patent Information
- Application Number
- CN202411952618.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-02-25
AI Technical Summary
The core extraction structure of existing bent pipe injection molds is complex and has high cost, resulting in high manufacturing cost and long manufacturing time.
A core pulling mechanism including a straight slider horizontally disposed on the mold side, a rotatable arc insert, a hinged swing arm and a guide structure is designed. The rear movement of the straight slider drives the swing arm to pull the arc insert to rotate, achieving easy and stable core pulling operation.
The core extraction mechanism of the bent injection mold with simple structure, low cost, short manufacturing time and convenient assembly is realized, and the yield and production efficiency of the mold are improved.
Smart Images
Figure CN119502270A_ABST
Abstract
Description
[Technical field]
[0001] The invention relates to a core-pulling mechanism of a bent pipe injection mould. [Background technology]
[0002] There are more and more plastic products in our daily life. With the rapid development of the plastic industry and the continuous improvement of the strength and quality of general and engineering plastics, plastic products are all processed by injection molds. In the process of mold design and manufacturing, especially the core-pulling structure used in the molds of arc-shaped bends for injection molding automobiles, many of them use the oil cylinder core-pulling structure because the products have arc-shaped bends. In order to improve the product yield, the oil cylinder core-pulling structure is relatively complex and has high production costs, resulting in high mold manufacturing costs and long mold manufacturing time.
[0003] The present invention is to solve the problem that the core pulling structure used in the arc bending mold is too complicated and the cost is too high. [Summary of the invention]
[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a core pulling mechanism for a bent pipe injection mold that can simplify the structure, easily and stably realize the core pulling of the bent pipe, has a simple structure, low cost, short manufacturing time, and is easy to assemble.
[0005] The object of the present invention is achieved in that:
[0006] A core pulling mechanism for a bent pipe injection mold, characterized in that it includes a straight slider horizontally arranged on one side of the mold, a rotatable arc-shaped insert is provided on the mold, a swing arm is hinged between the lower part of the straight slider and the lower part of the arc-shaped insert, a guide structure is provided between the mold and the arc-shaped insert to enable the arc-shaped insert to rotate to achieve core pulling, the mold is also provided with a support member to prevent the insert from retreating during injection molding, and the lower part of the inner side of the straight slider is also provided with a pusher that can push the arc-shaped insert to reset.
[0007] The core pulling mechanism of a bent tube injection mold as described above is characterized in that the guide structure includes guide seats provided on both sides of the arc-shaped insert on the mold, arc-shaped guide grooves are provided on the guide seats, and arc-shaped guide blocks cooperating with the arc-shaped guide grooves are provided on both sides of the arc-shaped insert.
[0008] The core pulling mechanism of the bent pipe injection mold as described above is characterized in that a through hole is provided on the mold, and lower grooves for installing the guide seat are provided on both sides of the bottom of the through hole, and the top wall of the lower groove forms a support member to prevent the insert from retreating during injection molding.
[0009] The core pulling mechanism of the bent tube injection mold as described above is characterized in that a cover plate is provided on the upper inner side of the straight sliding block, a positioning protrusion is provided on the inner side of the cover plate, and a positioning hole is provided on the arc-shaped insert to be inserted into the positioning protrusion.
[0010] The core pulling mechanism of the bent tube injection mold as described above is characterized in that one end of the swing arm is hinged to the inner lower end of the straight slider through a first pin, and the other end of the swing arm is hinged to the lower end of the arc insert through a second pin.
[0011] The core-pulling mechanism of the bent tube injection mold as described above is characterized in that raised mold cores are provided on both sides of the through hole on the upper surface of the mold, and the arc-shaped insert rotates between the two mold cores.
[0012] The beneficial effects of the present invention are:
[0013] The invention comprises a straight slider horizontally arranged on one side of a mold, a rotatable arc-shaped insert is arranged on the mold, a swing arm is hinged between the lower part of the straight slider and the lower part of the arc-shaped insert, and a guide structure that can rotate the arc-shaped insert to realize core pulling is arranged between the mold and the arc-shaped insert. When the mold is opened after injection molding, the straight slider moves backward and pulls the arc-shaped insert to rotate through the swing arm, so that core pulling is easily and stably realized, and the structure is simple, the cost is low, the manufacturing time is long, and the assembly is convenient.
Brief Description of the Drawings
[0014] Figure 1 is a stereogram of the present invention;
[0015] Figure 2 It is a three-dimensional diagram of another direction of the present invention;
[0016] Figure 3 It is an exploded view of the structure of the present invention;
[0017] Figure 4 yes Figure 2 The structural diagram under the curved insert is removed in the state;
[0018] Figure 5 It is a structural diagram of the mold of the present invention. [Specific implementation method]
[0019] The present invention will be further described below in conjunction with the accompanying drawings:
[0020] A core pulling mechanism for a curved tube injection mold, comprising a straight slider 2 horizontally arranged on one side of a mold 1, a rotatable arc-shaped insert 3 on the mold 1, a swing arm 4 hinged between the lower part of the straight slider 2 and the lower part of the arc-shaped insert 3, a guide structure 5 for rotating the arc-shaped insert to achieve core pulling is provided between the mold 1 and the arc-shaped insert 3, a support member 6 for preventing the insert from retreating during injection molding is also provided on the mold 1, and a pusher 7 for pushing the arc-shaped insert 3 to reset is also provided at the lower inner part of the straight slider 2. When the mold is opened after injection molding, the straight slider 2 moves backward and pulls the arc-shaped insert to rotate through the swing arm 4 to achieve core pulling, and the structure is simple and the cost is low.
[0021] The guide structure 5 of the present invention comprises guide seats 51 provided on both sides of the arc-shaped insert 3 on the mold 1, arc-shaped guide grooves 52 are provided on the guide seats 51, and arc-shaped guide blocks 53 cooperating with the arc-shaped guide grooves 52 are provided on both sides of the arc-shaped insert 3. Under the action of the arc-shaped guide grooves 52, the arc-shaped guide blocks 53 can realize core pulling when the arc-shaped insert 3 rotates downward, and when the straight-moving slide block 2 moves forward, the straight-moving slide block 2 drives the ejection pusher 7 to push the arc-shaped insert 3 upward to rotate and realize resetting.
[0022] The pusher 7 of the present invention is preferably a pair, which is respectively connected to the two sides of the lower swing arm 4 inside the straight slider 2, and a side groove 10 is provided on one side of the lower part of the mold 1 for the pair of pushers 7 and the swing arm 4 to pass through.
[0023] The mold 1 of the present invention is provided with a through hole 11, and lower grooves 12 for mounting the guide seat 51 are provided on both sides of the bottom of the through hole 11, and the top wall of the lower groove 12 forms a support member 6 for preventing the insert from retreating during injection molding. The guide seat 51 is provided with a mounting hole, and the lower groove 12 is also provided with a mounting hole, and the guide seat 51 is fixed to the bottom of the mold by screws.
[0024] The upper inner part of the straight slide block 2 of the present invention is provided with a cover plate 8, the inner side of the cover plate 8 is provided with a positioning protrusion 81, and the arc-shaped insert 3 is provided with a positioning hole 31 that can be inserted into the positioning protrusion. When the arc-shaped insert 3 is rotated upward to reset, the positioning protrusion 81 is inserted into the positioning hole 31 to achieve positioning.
[0025] One end of the swing arm 4 of the present invention is hinged to the inner lower end of the straight slider 2 through a first pin 41, and the other end of the swing arm 4 is hinged to the lower end of the arc insert 3 through a second pin 42. The first pin 41 and the second pin 42 are used as connections and rotation axes.
[0026] The mold 1 of the present invention has protruding mold cores 13 on both sides of the through hole 11 on the upper surface, and the arc-shaped insert rotates between the two mold cores 13 .
[0027] The overall shape of the arc insert 3 of the present invention is similar to a semicircular solid tube shape, which is divided into an upper part 301 and a lower part 302. The upper part is used to cooperate with the mold to inject the product, and the lower part is used to cooperate with the straight slider 2 to rotate and play a transmission role. The guide seat 51 is arranged on both sides of the lower part 302.
[0028] The arc-shaped insert 3 of the present invention is provided with an avoidance groove 32 in the middle of the lower part, and the arc-shaped insert 3 is provided with an axial hole 33 at the lower part. The axial hole 33 passes through the avoidance groove 32 , and one end of the swing arm 4 can be inserted into the avoidance groove 32 .
Claims
1. A core pulling mechanism for a pipe bending injection mold, characterized in that The invention comprises a straight-moving slider (2) arranged horizontally on one side of a mold (1); a rotatable arc-shaped insert (3) is arranged on the mold (1); a swing arm (4) is hinged between the lower part of the straight-moving slider (2) and the lower part of the arc-shaped insert (3); a guide structure (5) is arranged between the mold (1) and the arc-shaped insert (3) for rotating the arc-shaped insert to realize core pulling; a support member (6) is also arranged on the mold (1) for preventing the insert from retreating during injection molding; and a push member (7) is also arranged at the lower part of the inner side of the straight-moving slider (2) for pushing the arc-shaped insert (3) to reset.
2. The core-pulling mechanism of a bent tube injection mold according to claim 1, characterized in that The guide structure (5) comprises guide seats (51) provided on both sides of the arc-shaped insert (3) on the mold (1), arc-shaped guide grooves (52) are provided on the guide seats (51), and arc-shaped guide blocks (53) matching the arc-shaped guide grooves (52) are provided on both sides of the arc-shaped insert (3).
3. The core-pulling mechanism of a pipe bending injection mold according to claim 2, characterized in that The mold (1) is provided with a through hole (11), and lower grooves (12) for installing a guide seat are provided on both sides of the bottom of the through hole (11), and the top wall of the lower groove (12) forms a support member (6) for preventing the insert from retreating during injection molding.
4. The core-pulling mechanism of a bent tube injection mold according to claim 1, characterized in that A cover plate (8) is provided on the inner upper part of the straight-moving slide block (2), a positioning protrusion (81) is provided on the inner side of the cover plate (8), and a positioning hole (31) that can be inserted into the positioning protrusion is provided on the arc-shaped insert (3).
5. The core-pulling mechanism of a bent tube injection mold according to claim 1, characterized in that One end of the swing arm (4) is hinged to the inner lower end of the straight-moving slider (2) through a first pin (41), and the other end of the swing arm (4) is hinged to the lower end of the arc-shaped insert (3) through a second pin (42).
6. The core-pulling mechanism of a pipe bending injection mold according to claim 1, characterized in that Both sides of the through hole (11) on the upper surface of the mold (1) are provided with protruding mold cores (13), and the arc-shaped insert rotates between the two mold cores (13).