Anti-sticking injection mold for pitched roof
By introducing a stop bar in the injection mold to prevent the plastic part from sticking to the molding inclined block, the problem of uneven ejection of the plastic part is solved, and smooth ejection and good molding of the plastic part are achieved.
Patent Information
- Application Number
- CN202422654714.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-10-31
AI Technical Summary
When ejecting plastic parts from existing injection molds, the plastic parts tend to stick to the inclined ejector mold, resulting in uneven ejection, deformation of the plastic parts, and poor molding effect.
A blocking rod is used to prevent the plastic part from sticking to the molding angled ejector block. The blocking rod extends into the rear mold when the ejector pin and molding angled ejector block eject the plastic part. The blocking rod prevents the plastic part from sticking to the molding angled ejector block, prevents synchronous movement, and ensures that the plastic part is ejected smoothly.
This allows for smooth ejection of plastic workpieces, preventing deformation and improving molding results.
Smart Images
Figure CN223493758U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of injection molds, and in particular to a slanted-top anti-stick injection mold. Background Technology
[0002] Currently, existing injection molds, due to the presence of both straight ejector pins and angled ejector pins, exhibit several problems during mold opening and ejection of plastic parts. When the plastic part is ejected, the straight ejector pins push the part straight out, but parts of the part can stick to the angled ejector pins and move in the opposite direction. The angled ejector pins then pull the plastic part along with them, causing uneven ejection, jamming of the plastic part within the mold, deformation, and poor molding results. Therefore, the structure of existing injection molds needs further improvement. Utility Model Content
[0003] The purpose of this invention is to provide a slanted top anti-stick injection mold that makes it easy to eject plastic parts and provides good molding results.
[0004] The purpose of this utility model is achieved as follows:
[0005] A slanted ejector anti-stick injection mold includes a base plate, an ejector pin mounting plate, a rear mold, a rear mold base, and a front mold. The rear mold includes a rear die, a blocking rod, and a rear mold base. The rear mold base is located on the front side of the base plate and is fixedly connected to the base plate. The rear die is mounted on the rear mold base. The front mold has an inlet, a hot runner, and an outlet. The back of the front mold has a front forming groove. The front surface of the rear mold has a rear forming groove corresponding to the position of the front forming groove. The front surface of the rear mold has multiple slanted ejector forming grooves corresponding to the positions of multiple ejector pins. The slanted ejector forming grooves communicate with the rear forming grooves. The ejector pin mounting plate is horizontally slidably disposed between the base plate and the rear mold. The ejector mounting plate is provided with multiple ejector pins, and the ejector cover plate is located on the front surface of the ejector mounting plate. The front end of the ejector pin passes horizontally forward through the ejector cover plate, the rear mold base and the rear mold in sequence. Multiple ejector rods are inclined and arranged on the ejector cover plate. The rear ends of the multiple ejector rods are rotatably connected to the ejector cover plate. The front ends of the multiple ejector rods are provided with forming inclined ejector blocks. The forming inclined ejector blocks are slidably located in the inclined ejector forming groove. The forming inclined ejector blocks are provided with side forming grooves, which are connected to the inclined ejector forming groove. The first end of the blocking rod is located on the ejector cover plate, and the second end of the blocking rod extends horizontally forward and is located in front of the forming inclined ejector block. This invention utilizes a blocking rod to prevent the plastic part from sticking to the molding angled ejector block and to prevent the two from moving synchronously. When the ejector pin and molding angled ejector block eject the plastic workpiece, the blocking rod also extends into the rear mold. The blocking rod prevents the plastic part from sticking to the molding angled ejector block and moves to one side with the molding angled ejector block, thereby making the plastic workpiece eject smoothly without deformation. The plastic part separates from the molding angled ejector block, which facilitates the ejector pin and molding angled ejector block to eject the plastic workpiece smoothly.
[0006] The present invention can be further improved in the following ways.
[0007] The first end of the blocking rod has a forming groove on its side, and the forming groove is connected to the front of the side forming groove.
[0008] The inclined top forming groove is an inclined groove.
[0009] The ejector mounting plate has a first clearance hole corresponding to the position of the blocking rod, the ejector cover plate has a second clearance hole corresponding to the position of the blocking rod, and the rear mold base has a third clearance hole corresponding to the position of the blocking rod. The front end of the ejector pin passes horizontally forward through the second clearance hole into the rear mold, and the front end of the blocking rod passes horizontally through the ejector mounting plate, the ejector cover plate, and the rear mold base in sequence.
[0010] The beneficial effects of this utility model are as follows:
[0011] I. This utility model utilizes a blocking rod to prevent the plastic part from sticking to the molding inclined ejector block and to prevent the two from moving synchronously. When the ejector pin and molding inclined ejector block eject the plastic workpiece, the blocking rod also extends into the rear mold. The blocking rod prevents the plastic part from sticking to the molding inclined ejector block and moves to one side with the molding inclined ejector block, thereby making the plastic workpiece eject smoothly without deformation. The plastic part separates from the molding inclined ejector block, which facilitates the ejector pin and molding inclined ejector block to eject the plastic workpiece smoothly. Attached Figure Description
[0012] Figure 1 This is a structural schematic diagram of the inclined top anti-stick injection mold of this utility model.
[0013] Figure 2 This is a structural schematic diagram of the inclined top anti-stick injection mold of this utility model from another angle.
[0014] Figure 3 This is an exploded view of the angled anti-stick injection mold of this utility model.
[0015] Figure 4 This is a cross-sectional view of the inclined top anti-stick injection mold of this utility model.
[0016] Figure 5 This is a schematic diagram of the structure of the inclined anti-stick injection mold of this utility model, omitting the front mold, rear mold, rear mold base, ejector pin, and forming inclined ejector block.
[0017] Figure 6 This is a schematic diagram of the structure of the inclined top anti-stick injection mold of this utility model, omitting the front mold, rear mold, and rear mold base.
[0018] Figure 7 This is a top view of the inclined top anti-stick injection mold of this utility model, omitting the front mold, rear mold, and rear mold base.
[0019] Figure 8 yes Figure 7 Side view.
[0020] Figure 9 yes Figure 7 Sectional view at point AA.
[0021] Figure 10 yes Figure 9 Enlarged view of point A in the middle.
[0022] Figure 11 yes Figure 7 Sectional view at point BB.
[0023] Figure 12 yes Figure 7 Sectional view at point CC.
[0024] Figure 13 yes Figure 12 Enlarged view of point B in the middle.
[0025] Figure 14 This is a schematic diagram of the front mold of this utility model. Detailed Implementation
[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0027] Example 1, as Figures 1 to 14 As shown, a slanted ejector anti-stick injection mold includes a base plate 3, an ejector mounting plate 5, a rear mold 2, and a front mold 1. The rear mold 2 includes a rear mold 23, multiple blocking rods 6, and a rear mold base 20. The rear mold base 20 is located on the front side of the base plate 3 and is fixedly connected to the base plate 3. The rear mold 23 is located on the rear mold base 20. The front mold 1 is provided with a sprue 11, a hot runner 13, and a discharge port 12. The back of the front mold 1 is provided with a front forming groove 10. The front surface of the rear mold 23 is provided with a rear forming groove 22 corresponding to the position of the front forming groove 10. The front surface of the rear mold 23 is provided with multiple slanted ejector forming grooves 21 corresponding to the positions of the multiple ejector rods 8. The slanted ejector forming grooves 21 communicate with the rear forming grooves 22. The ejector mounting plate 5 is horizontally slidably disposed on the base plate 3 and the front mold 1. Between the rear mold 23, multiple ejector pins 7 are provided on the ejector pin mounting plate 5. The ejector pin cover plate 4 is located on the front surface of the ejector pin mounting plate 5. The front ends of the ejector pins 7 pass horizontally forward through the ejector pin cover plate 4, the rear mold base 20, and the rear mold 23 in sequence. Multiple ejector rods 8 are inclined and arranged on the ejector pin cover plate 4. The rear ends of the multiple ejector rods 8 are rotatably connected to the ejector pin cover plate 4. The front ends of the multiple ejector rods 8 are provided with forming inclined ejector blocks 81. The forming inclined ejector blocks 81 are slidably disposed in the inclined ejector forming groove 21. The forming inclined ejector blocks 81 are provided with side forming grooves 82, which are connected to the inclined ejector forming groove 21. The first end of the blocking rod 6 is located on the ejector pin cover plate 4, and the second end of the blocking rod 6 extends horizontally forward and is located in front of the forming inclined ejector block 81. The structure of the front mold 1 of this utility model is prior art, and its structure and working principle will not be described in detail here.
[0028] This is a more specific technical solution of the present invention.
[0029] The first end of the blocking rod 6 has a forming groove 60 on its side, and the forming groove 60 is connected to the front of the side forming groove 82.
[0030] The inclined top forming groove 21 is an inclined groove.
[0031] The front end of the blocking rod 6 is provided with a connecting slider 61, which is located between the ejector pin mounting plate 5 and the base plate 3. A delay spring 63 is provided between the connecting block and the rear surface of the ejector pin mounting plate 5.
[0032] The side wall of the blocking rod 6 is provided with a limiting protrusion 62. The limiting protrusion 62 is located between the front surface of the ejector mounting plate 5 and the rear surface of the ejector cover plate 4. The front surface of the ejector mounting plate 5 is provided with a limiting groove 65 corresponding to the limiting protrusion 62. When the connecting slider 61 abuts against the base plate 3, there is a gap 64 between the bottom surface of the limiting protrusion 62 and the limiting groove 65.
[0033] The ejector mounting plate 5 is provided with a first clearance hole 51 corresponding to the position of the blocking rod 6, the ejector cover plate 4 is provided with a second clearance hole 41 corresponding to the position of the blocking rod 6, and the rear mold base 20 is provided with a third clearance hole 29 corresponding to the position of the blocking rod 6. The front end of the ejector pin 7 passes horizontally forward through the second clearance hole 41 and passes horizontally through the ejector mounting plate 5, the ejector cover plate 4, and the rear mold base 20 in sequence.
[0034] The plastic workpiece 9 of this utility model includes a horizontal arm 91 and multiple vertical arms 92, which are perpendicularly connected to the horizontal arm 91.
[0035] The working principle of this utility model is as follows:
[0036] In operation, the front mold 1 and the rear mold 23 close, and the front forming groove 10 and the rear forming groove 22 close together. Molten plastic material is then injected into the mold through the inlet 11, enters the hot runner for further heating, and flows from the outlet 12 into the front forming groove 10 and the rear forming groove 22, and then into the inclined ejector forming groove 21, the side forming groove 82, and the forming small groove 60. The molten plastic material begins to form and then cools. The front mold 1 and the rear mold 23 then open. Afterward, the hydraulic cylinder drives the ejector mounting plate 5 and the ejector cover plate 4 forward, and the ejector pin 7 and the inclined ejector forming block begin to eject the plastic workpiece 9. Due to the gap 6 between the limiting protrusion 62 and the bottom surface of the limiting groove 65... 4. The delay spring 63 continues to press the connecting slider 61 and the blocking rod 6. The blocking rod 6 does not move forward until there is no gap 64 between the limiting protrusion 62 and the limiting groove 65. Only then does the ejector plate 5 drive the blocking rod 6 to move forward. The blocking rod 6 extends forward into the inclined ejector forming groove 21. The blocking rod 6 just blocks the longitudinal arm 92 of the plastic workpiece 9. The longitudinal arm 92 will no longer stick to the inclined ejector forming block. The longitudinal arm 92 will not move to one side with the inclined ejector forming block. Therefore, the plastic workpiece 9 of this utility model is ejected smoothly, the plastic workpiece 9 does not deform, and the plastic part is separated from the forming inclined ejector block 81, which facilitates the ejector pin 7 and the forming inclined ejector block 81 to eject the plastic workpiece 9 smoothly.
Claims
1. A slanted-top anti-stick injection mold, comprising a base plate (3), an ejector pin mounting plate (5), a rear mold (2), a rear mold base (20), and a front mold (1). The rear mold (2) comprises a rear mold (23) and a rear mold base (20). The rear mold base (20) is located on the front side of the base plate (3) and is fixedly connected to the base plate (3). The rear mold (23) is located on the rear mold base (20). The front mold (1) is provided with a sprue (11), a hot runner (13), and a discharge port (12). The back side of the front mold (1) is provided with a front forming groove (10). The front surface of the rear mold (23) corresponds to the front forming groove. The rear forming groove (22) is provided at the position of the rear mold (23). The front surface of the rear mold (23) is provided with multiple inclined forming grooves (21) corresponding to the positions of multiple ejector pins (8). The inclined forming grooves (21) are connected to the rear forming groove (22). The ejector pin mounting plate (5) is horizontally slidably set between the base plate (3) and the rear mold (23). Multiple ejector pins (7) are provided on the ejector pin mounting plate (5). The ejector pin cover plate (4) is set on the front surface of the ejector pin mounting plate (5). The front end of the ejector pin (7) passes horizontally forward through the ejector pin cover plate (4), the rear mold base (20) and the rear mold (23) in sequence. Its characteristic is that... The rear mold (2) also includes a blocking rod (6). Multiple ejector rods (8) are inclined and arranged on the ejector cover plate (4). The rear ends of the multiple ejector rods (8) are rotatably connected to the ejector cover plate (4). The front ends of the multiple ejector rods (8) are provided with a forming inclined ejector block (81). The forming inclined ejector block (81) is slidably disposed in the inclined ejector forming groove (21). The forming inclined ejector block (81) is provided with a side forming groove (82). The side forming groove (82) is connected to the inclined ejector forming groove (21). The first end of the blocking rod (6) is disposed on the ejector cover plate (4). The second end of the blocking rod (6) extends horizontally forward and is located on the front side of the forming inclined ejector block (81).
2. The inclined ejector anti-stick injection mold according to claim 1, characterized in that: The first end of the blocking rod (6) is provided with a forming groove (60) on its side, and the forming groove (60) is connected to the front of the side forming groove (82).
3. The inclined top anti-stick injection mold according to claim 1, characterized in that: The inclined top forming groove (21) is an inclined groove.
4. The inclined ejector anti-stick injection mold according to claim 1, characterized in that: The ejector mounting plate (5) is provided with a first clearance hole (51) corresponding to the position of the blocking rod (6), the ejector cover plate (4) is provided with a second clearance hole (41) corresponding to the position of the blocking rod (6), and the rear mold base (20) is provided with a third clearance hole (29) corresponding to the position of the blocking rod (6). The front end of the ejector (7) passes horizontally forward through the second clearance hole (41) and passes horizontally through the ejector mounting plate (5), the ejector cover plate (4), and the rear mold base (20) in sequence.