Mould with secondary ejection control mechanism
By designing a simple and easy-to-operate secondary ejection control mechanism in the mold, the mold damage caused by improper resetting of the needle plate mechanism is solved, and efficient production of plastic products and extension of mold life is achieved.
Patent Information
- Application Number
- CN202323654209.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-31
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2033-12-31
AI Technical Summary
During the secondary ejection and resetting process of existing molds, the reset sequence or position of the needle plate mechanism is incorrect, resulting in a mold damage and reducing the mold life.
A simple and easy-to-operate secondary ejection control mechanism is designed. Through the cooperation of the insertion block, sliding block, fixed seat and second spring, the synchronous movement and smooth reset of the needle plate group are achieved to avoid interference from mold assembly.
It effectively avoids mold damage, ensures efficient and stable production of plastic products, and extends the service life of the mold.
Smart Images
Figure CN222712608U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of thermoplastic plastic molding molds and relates to a mold provided with a secondary ejection control mechanism. The utility model is mainly applied to a mold provided with a secondary ejection mechanism to solve the problem that the ejection and reset strokes of two sets of face needle plate mechanisms of the secondary ejection are not in place, and to prevent damage to the mold caused by the failure of the secondary ejection mechanism to reset in place. Background Art
[0002] Since the shape of plastic products is to meet the use requirements, they are often provided with complex internal structures. In the process of mold design, some plastic products cannot be demoulded after one ejection, and a secondary ejection mechanism is required to meet the ejection of plastic products. The secondary ejection mechanism is provided with two sets of face needle plate mechanisms. In practical applications, the biggest problem of this particular mechanism is the reset problem of the two sets of face needle plate mechanisms. If the reset sequence or position is incorrect, it will cause mold damage and reduce the life of the mold. The existing technology generally uses a long plate of the first reset mechanism to promote the reset of the face needle plate mechanism, or uses a snap-on strong reset mechanism. This type of technology has high cost, and the relevant parts are long and rely entirely on mechanical force to reset. Long-term use will cause damage, affecting the reset effect. Summary of the invention
[0003] The utility model aims to provide a mold with a secondary ejection control mechanism, which uses a simple and easy-to-operate structure to control the movement of the secondary ejection mechanism of the mold, prevent mold damage caused by mold component failure during mass production, and ensure efficient and stable production of plastic products.
[0004] The technical problem to be solved by the utility model is to provide a mold with a secondary ejection control mechanism to solve the problems existing in the production of the secondary ejection mechanism, especially the situation where the mold space is limited.
[0005] The technical scheme of the utility model is: a mold with a secondary ejection control mechanism includes: a movable template 1, a square iron 2, a first needle plate group 3, a second needle plate group 4, an insert block 5, a sliding block 6, a fixed seat 7, a shoulder bolt 8, a reset rod 9, a first spring 10, and a second spring 11, and the connection relationship is that the movable template 1 is surface-contacted with the square iron 2 and bolted and fixed, a step surface is provided on the square iron 2, the first needle plate group 3 is surface-contacted with the step surface provided on the square iron 2 and limited, the insert block 5 is surface-contacted with the movable template 1 and bolted and fixed, the insert block 5 is provided with an insert rod and an inclined surface, the sliding block 6 is provided with an inclined surface and a countersunk hole, and the sliding block 6 is in contact with the first The surface contact and sliding fit of the needle plate group 3 is limited by bolts, the second spring 11 is in clearance fit with the countersunk hole set on the sliding block 6, the second spring 11 is in surface contact and limited with the first needle plate group 3, the inclined surface set on the plug block 5 is in surface contact and limited with the inclined surface set on the sliding block 6, the fixed seat 7 is in surface contact with the second needle plate group 4 and is locked and fixed by bolts, a through groove is set on the fixed seat 7, the fixed seat 7 is in surface contact with the sliding block 6, the shoulder bolt 8 is threadedly connected with the first needle plate group 3 with clearance fit, the shoulder bolt 8 is in clearance fit with the second needle plate group 4, the reset rod 9 is in sliding fit with the movable template 1, and the reset rod 9 is in clearance fit with the first needle plate group 3. The reset rod 9 is in contact with the second needle plate group 4 and is limited by the hanging platform. The first spring 10 is in clearance with the movable template 1. The first spring 10 is in clearance with the first needle plate group 3. The first spring 10 is in contact with the second needle plate group 4. During the mold opening process, the fixed seat 7 applies a thrust to the sliding block 6 to cause the first needle plate group 3 and the second needle plate group 4 to move synchronously and perform the first ejection movement. When the first needle plate group 3 is in contact with the movable template 1, the first needle plate group 3 stops moving, the inclined surface set on the insert block 5 applies pressure to the inclined surface set on the sliding block 6, the second spring 11 is compressed, and the sliding block 6 is pressed into the first needle plate group 3, the second needle plate group 4 continues to move, and the insert block 5 is inserted into the through groove set on the fixed seat 7 to complete the second ejection movement; the first spring 10 applies a thrust to the second needle plate group 4 when resetting, and the second needle plate group 4 performs a resetting movement. When the shoulder bolt 8 contacts the countersunk surface set on the second needle plate group 4, the shoulder bolt 8 drives the first needle plate group 3 and the second needle plate group 4 to perform a resetting movement together, and the insert block 5 is separated from the fixed seat 7, and the sliding block 6 is reset under the action of the second spring 11, and the inclined surface set on the insert block 5 contacts the inclined surface set on the sliding block 6 and prompts the first needle plate group 3 to finally reset.
[0006] The first needle plate assembly 3 is provided with a cavity, and a gap between the cavity and the sliding block 6 is larger than a sliding stroke of the sliding block 6 .
[0007] The second needle plate assembly 4 is provided with a countersunk hole, and in the mold-closed state, a gap of 0.5 to 2 mm is provided between the shoulder bolt 8 and the bottom surface of the countersunk hole provided on the second needle plate assembly 4 .
[0008] The beneficial effects of the utility model are as follows: through the coordinated use of the insert block 5, the sliding block 6, the fixing seat 7 and the second spring 11, a simple mechanism is used to realize the smooth operation of the ejection and resetting of the secondary ejection mechanism of the plastic mold, thereby avoiding mold damage caused by interference of mold components, working smoothly and reliably, improving efficiency and extending the life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The following is a detailed description of the embodiments with reference to the accompanying drawings.
[0010] Figure 1 This is a schematic diagram of the assembly of a mold with a secondary ejection control mechanism. Figure 1 .
[0011] Figure 2 This is a schematic diagram of the assembly of a mold with a secondary ejection control mechanism. Figure 2 .
[0012] Figure 3 This is a schematic diagram of the assembly of a mold with a secondary ejection control mechanism. Figure 3 .
[0013] Figure 4 This is a partial diagram of a mold with a secondary ejection control mechanism. Figure 4 .
[0014] Figure 5 This is a partial diagram of a mold with a secondary ejection control mechanism. Figure 5 .
[0015] In the figure: 1 movable template; 2 square iron; 3 first needle plate group; 4 second needle plate group; 5 insert block; 6 sliding block; 7 fixed seat; 8 shoulder bolt; 9 reset rod; 10 first spring; 11 second spring. DETAILED DESCRIPTION
[0016] The specific embodiments of the utility model are described in detail below in combination with technical text and drawings.
[0017] like Figures 1 to 5 As shown, the utility model provides a mold with a secondary ejection control mechanism, the movable plate 1 is fixed by bolts in surface contact with the square iron 2, a step surface is provided on the square iron 2, the first needle plate group 3 is in surface contact with the step surface provided on the square iron 2 and is limited, and the insert block 5 is fixed by bolts in surface contact with the movable plate 1 (see Figure 1 ), the insert block 5 is provided with an insert rod and an inclined surface, and the sliding block 6 is provided with an inclined surface and a countersunk hole (see Figure 3 , 4), the sliding block 6 is in surface contact and sliding cooperation with the first needle plate group 3 and is limited by bolts, the second spring 11 is in clearance cooperation with the countersunk hole set on the sliding block 6, the second spring 11 is in surface contact and limited with the first needle plate group 3, the inclined surface set on the insert block 5 is in surface contact and limited with the inclined surface set on the sliding block 6, the fixed seat 7 is in surface contact with the second needle plate group 4 and is locked and fixed by bolts, a through groove is set on the fixed seat 7, and the fixed seat 7 is in surface contact with the sliding block 6 (see Figure 3 ), the shoulder bolt 8 is threadedly connected with the first needle plate group 3 with clearance fit, the shoulder bolt 8 is clearance fit with the second needle plate group 4, the reset rod 9 is slidingly matched with the movable template 1, the reset rod 9 is clearance fit with the first needle plate group 3, the reset rod 9 is in surface contact with the second needle plate group 4 and is limited by the hanging platform, the first spring 10 is clearance fit with the movable template 1, the first spring 10 is clearance fit with the first needle plate group 3, and the first spring 10 is in surface contact with the second needle plate group 4 (see Figure 2 ); During the mold opening process, the fixed seat 7 applies a thrust to the sliding block 6, prompting the first needle plate group 3 and the second needle plate group 4 to move synchronously and perform the first ejection movement. When the first needle plate group 3 contacts the movable template 1, the first needle plate group 3 stops moving, and the inclined surface set on the insert block 5 applies pressure to the inclined surface set on the sliding block 6. The second spring 11 is compressed, and the sliding block 6 is pressed into the cavity of the first needle plate group 3. The second needle plate group 4 continues to move, and the insert block 5 is inserted into the through groove set on the fixed seat 7. The first spring 10 applies a thrust to the second needle plate group 4 during resetting, and the second needle plate group 4 performs a resetting movement. When the shoulder bolt 8 contacts the countersunk surface provided on the second needle plate group 4, the shoulder bolt 8 drives the first needle plate group 3 and the second needle plate group 4 to perform a resetting movement together. At the same time, the insert block 5 is separated from the fixed seat 7, and the sliding block 6 is reset under the action of the second spring 11. The inclined surface provided on the insert block 5 contacts the inclined surface provided on the sliding block 6 and causes the first needle plate group 3 to be finally reset (see Figure 1 , 3 ).
[0018] The first needle plate group 3 is provided with a cavity, and the gap between the cavity and the sliding block 6 is larger than the sliding stroke of the sliding block 6 (see Figure 3 ).
[0019] The second needle plate group 4 is provided with a countersunk hole, and in the closed mold state, the shoulder bolt 8 and the bottom surface of the countersunk hole provided on the second needle plate group 4 are provided with a gap of 0.5 to 2 mm (see Figure 2 ).
[0020] When assembling the mold, the reset rod 9 is inserted into the mold cavity processed by the second needle plate group 4, the shoulder bolt 8 passes through the second needle plate group 4 and is threadedly locked with the first needle plate group 3, the first spring 10 is sleeved on the reset rod 9, the first spring 10 is fitted into the mold cavity processed by the sliding block 6, and the first spring 10 and the sliding block 6 are fitted as a whole into the mold cavity processed by the first needle plate group 3 (see Figure 4 , 5 ), the fixing seat 7 is installed in the mold cavity processed by the second needle plate group 4, and contacts and limits the sliding block 6. The first needle plate group 3 and the second needle plate group 4 are installed in the mold as a whole (see Figure 2 ), the first needle plate group 3 is assembled with the step processed on the square iron 2, the plug block 5 is assembled in the cavity processed by the moving template 1, the bolt passes through the plug block 5 to lock it, and the moving template 1 and the square iron 2 are assembled and fixed by bolts (see Figure 1 , 3 ).
[0021] The secondary ejection and reset process of the mold is as follows: after the injection molding is completed, the molding machine applies a thrust to the second needle plate group 4, the first spring 10 is compressed, and the fixed seat 7 applies a thrust to the sliding block 6 to realize the synchronous movement of the first needle plate group 3 and the second needle plate group 4. When the first needle plate group 3 is in contact with the movable template 1, the first ejection is completed, the plug block 5 pushes the sliding block 6 to retract, the second spring 11 is compressed, the plug block 5 is inserted into the fixed seat 7, and the second needle plate group 4 continues to move to realize the second ejection. When resetting, the first spring 10 applies a thrust to the second needle plate group 4, and the second needle plate group 4 moves. The shoulder bolt 8 links the first needle plate group 3 and the second needle plate group 4 to move together. When the plug block 5 is completely separated from the fixed seat 7, the plug block 5 contacts the inclined surface of the sliding block 6 and further promotes the reset of the first needle plate group 3.
[0022] The secondary ejection control mechanism can not only realize the motion control of the face needle plate group, but also can be widely used in the motion control of the template, especially can be widely used in the sequential mold opening process of multi-plate molds.
[0023] The above is a superior implementation method of the utility model. It should be pointed out that for technicians in the technical field to which the utility model belongs, several improvements and deformations can be made without departing from the technical principles of the utility model. These improvements and deformations should also be regarded as the protection scope of the utility model.
Claims
1. A mold with a secondary ejection control mechanism, characterized in that The structure comprises: a movable template (1), a square iron (2), a first needle plate group (3), a second needle plate group (4), an insert block (5), a sliding block (6), a fixed seat (7), a shoulder bolt (8), a reset rod (9), a first spring (10), and a second spring (11), wherein the connection relationship is as follows: a step surface is provided on the square iron (2), the first needle plate group (3) is in surface contact with and limited by the step surface provided on the square iron (2), the insert block (5) is in surface contact with the movable template (1) and is locked and fixed by bolts, the insert block (5) is provided with an insert rod and an inclined surface, the sliding block (6) is provided with an inclined surface and a countersunk hole, the sliding block (6) is in surface contact with and slidingly matched with the first needle plate group (3) and is limited by bolts, and the second spring (11) is in surface contact with and fixed by the sliding block. The countersunk hole provided on the moving block (6) is clearance-matched, the second spring (11) is in surface contact with and limited by the first needle plate group (3), the inclined surface provided on the insert block (5) is in surface contact with and limited by the inclined surface provided on the sliding block (6), the fixed seat (7) is in surface contact with the second needle plate group (4) and is fixed by bolt locking, a through groove is provided on the fixed seat (7), the fixed seat (7) is in surface contact with the sliding block (6), the shoulder bolt (8) is threadedly connected with the first needle plate group (3) in clearance match, the shoulder bolt (8) is clearance-matched with the second needle plate group (4), the reset rod (9) is slidingly matched with the moving template (1), the reset rod (9) is clearance-matched with the first needle plate group (3), and the reset rod (9) is in surface contact with the second needle plate group (4) The first spring (10) and the movable template (1) are limited by the hanging table, the first spring (10) and the first needle plate group (3) are in clearance fit, and the first spring (10) and the second needle plate group (4) are in surface contact; during the mold opening process, the fixed seat (7) applies a thrust to the sliding block (6), prompting the first needle plate group (3) and the second needle plate group (4) to move synchronously and perform the first ejection movement. When the first needle plate group (3) and the movable template (1) are in surface contact, the first needle plate group (3) stops moving, the inclined surface provided on the insert block (5) applies pressure to the inclined surface provided on the sliding block (6), the second spring (11) is compressed, and the sliding block (6) is pressed into the cavity of the first needle plate group (3). The second needle plate group (4) continues to move, and the insert block (5) is inserted into the through groove provided on the fixed seat (7) to complete the second ejection movement; the first spring (10) applies a thrust to the second needle plate group (4) during resetting, and the second needle plate group (4) performs a resetting movement. When the shoulder bolt (8) contacts the countersunk hole surface provided on the second needle plate group (4), the shoulder bolt (8) drives the first needle plate group (3) and the second needle plate group (4) to perform a resetting movement together, and at the same time, the insert block (5) is separated from the fixed seat (7), and the sliding block (6) is reset under the action of the second spring (11). The inclined surface provided on the insert block (5) contacts the inclined surface provided on the sliding block (6) and prompts the first needle plate group (3) to finally reset.
2. The mold with a secondary ejection control mechanism according to claim 1, characterized in that: The first needle plate group (3) is provided with a cavity, and the gap between the cavity and the sliding block (6) is greater than the sliding stroke of the sliding block (6).
3. The mold with a secondary ejection control mechanism according to claim 1, characterized in that: The second needle plate assembly (4) is provided with a countersunk hole, and in the mold-closed state, a gap of 0.5 to 2 mm is provided between the shoulder bolt (8) and the bottom surface of the countersunk hole provided on the second needle plate assembly (4).