Insert internal drawing type mechanism for injection mold

Abstract

The utility model discloses an insert internal pulling type mechanism for an injection mold, which comprises a front mold plate and a rear mold plate, a fixed block is arranged on the rear mold plate, a stepped hole through which an insert can pass is formed in the fixed block, the insert passes through the stepped hole and is matched with the front mold plate, a core pulling insert is in sliding fit in the stepped hole, and the core pulling insert is matched with the front mold plate. The insert is arranged at the end, close to the stepped hole, of the core-pulling insert, a limiting head extends from the end, away from the stepped hole, of the core-pulling insert, the core-pulling insert is sleeved with a spring, the two ends of the spring abut against the stepped hole and the limiting head respectively to force the core-pulling insert to move away from the front mold plate, and a check block for limiting the maximum moving range of the limiting head is arranged on one side of the limiting head. A front mold shoveling machine matched with the limiting head is arranged on the front mold plate, so that the core-pulling insert drives the insert to penetrate through the stepped hole to be matched with the front mold plate; through the mode, the front mold plate and the insert can be prevented from being scraped during mold opening and mold closing.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to an insert inner-drawing mechanism for an injection mold. Background Art

[0002] The injection molding process is an optimal process that can meet the processing and production of various non-standard special-shaped parts. Compared with traditional cutting and punching and milling processing methods, it has the significant advantages of one-time molding and scalable production. However, due to the diverse shapes of injection molded products, some products require insert molding in the mold. As the installation of inserts in products becomes more and more complicated, if there is a slight positional deviation of the insert position, after the insert is placed on the slider and the mold is closed, the front template is likely to scratch the insert during movement, resulting in the generation of metal wire or metal chips, so that the mold must be removed for maintenance, and at the same time, it causes equipment downtime costs. Utility Model Content

[0003] The main technical problem solved by the utility model is to provide an insert inner-drawing mechanism for an injection mold, which can avoid scratches between the front template and the insert during mold opening and mold closing.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide an insert inner pulling mechanism for an injection mold, comprising: a front template and a rear template, a fixed block is provided on the rear template, the fixed block is provided with a stepped hole that allows the insert to pass through, the insert passes through the stepped hole and cooperates with the front template, a core pulling insert is slidably fitted in the stepped hole, the insert is provided at one end of the core pulling insert close to the stepped hole, a limiting head is extended at the end of the core pulling insert away from the stepped hole, a spring is sleeved on the core pulling insert, the two ends of the spring respectively resist the stepped hole and the limiting head to force the core pulling insert to move away from the front template, a block is provided on one side of the limiting head to limit the maximum moving range of the limiting head, and a front mold shovel machine cooperating with the limiting head is provided on the front template, so that the core pulling insert drives the insert to pass through the stepped hole and cooperate with the front template.

[0005] Preferably, one end of the front mold shovel is fixedly connected to the front mold plate, and the other end of the front mold shovel is provided with a first inclined surface on the side close to the limit head, and the limit head is provided with a second inclined surface parallel to the first inclined surface on the side close to the first inclined surface. When the front mold shovel is close to the limit head, the first inclined surface and the second inclined surface are pressed against each other and push the core-pulling insert toward the stepped hole.

[0006] Preferably, the fixing block is provided with an opening for the front mold shovel machine to pass through.

[0007] Preferably, the stop block is provided with a limiting guide groove that cooperates with the front mold shovel machine.

[0008] The beneficial effects of the utility model are as follows: by installing the insert on the core-pulling insert, the sliding of the core-pulling insert drives the change of the position of the insert, so that the insert is in the working position when the mold is closed, thereby avoiding the front template from scratching the insert during the mold closing process; when the mold is opened, the insert leaves the working position, thereby avoiding the front template from scratching the insert during the mold opening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional view of the utility model when the mold is opened;

[0010] Figure 2 It is a cross-sectional view of the utility model when the mold is closed;

[0011] Figure 3 It is an exploded schematic diagram of the present utility model.

[0012] The markings of the components in the accompanying drawings are as follows:

[0013] 1. Front template; 2. Rear template; 3. Fixed block; 31. Stepped hole; 32. Opening; 4. Core-pulling insert; 41. Limiting head; 411. Second inclined surface; 42. Spring; 5. Stop block; 51. Limiting guide groove; 6. Front mold shovel; 61. First inclined surface; 7. Insert. DETAILED DESCRIPTION

[0014] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0017] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0018] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0020] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) basic units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0021] Example:

[0022] The cam 31 is provided with a plurality of locking cams 36 which are provided on the front plate 1 and the locking cam 37 which are provided on the front plate 1. The cam 31 is provided with a plurality of locking cams 37 which are provided on the front plate 1 and the locking cam 37 which are provided on the front plate 1 are provided with a plurality of locking cams 36 which are provided on the front plate 1.

[0023] One end of the front mold shovel 6 is fixedly connected to the front mold plate 1, and the other end of the front mold shovel 6 is provided with a first inclined surface 61 on the side close to the limit head 41, and the limit head 41 is provided with a second inclined surface 411 parallel to the first inclined surface 61 on the side close to the first inclined surface 61. When the front mold shovel 6 is close to the limit head 41, the first inclined surface 61 and the second inclined surface 411 are pressed against each other and push the core-pulling insert 4 toward the stepped hole 31.

[0024] When the mold is opened, the front template 1 moves upward. At this time, the limit head 41 of the core pulling insert 4 is not compressed, so that the core pulling insert 4 is forced to move with the insert 7 away from the stepped hole 31 under the action of the elastic force of the spring 42, that is, it is retracted into the stepped hole 31, and then the insert 7 is no longer in the working position. In this way, the front template 1 and the insert 7 are prevented from scratching each other during the mold opening process, and the position of the fixed block 3 blocks the maximum distance of the core pulling insert 4 away from the stepped hole 31; when the mold is closed, the front template 1 moves downward, driving the front mold shovel 6 to move downward, and the first inclined surface 61 of the front mold shovel 6 gradually slides and presses against the second inclined surface 411 of the limit head 41, thereby forcing the core pulling insert 4 to move toward the stepped hole 31 under the action of the pressure of the front mold shovel 6, and then driving the insert 7 to extend out of the stepped hole 31 to the working position, and the mold closing is also completed at this time, thereby avoiding scratching between the front template 1 and the insert 7 during the mold closing process.

[0025] An opening 32 is provided on the fixed block 3 for the front mold shovel machine 6 to pass through, so that the front mold shovel machine 6 can directly extend into the fixed block 3 from the opening 32 and cooperate with the limit head 41, and completely extend out of the fixed block 3 relative to the limit head 41, so that the length of the core-pulling insert 4 can be reduced.

[0026] The block 5 is provided with a limiting guide groove 51 which cooperates with the front mold shovel machine 6. The limiting guide groove 51 limits the maximum descending distance of the front mold shovel machine 6 on the one hand, and guides the front mold shovel machine 6 on the other hand, so that the front mold shovel machine 6 is more stable during the descending or ascending process.

[0027] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An insert inner-drawing mechanism for an injection mold, characterized in that: include: A front template (1) and a rear template (2), wherein a fixing block (3) is provided on the rear template (2), wherein the fixing block (3) is provided with a stepped hole (31) through which an insert (7) can pass, wherein the insert (7) passes through the stepped hole (31) and cooperates with the front template (1), wherein a core-pulling insert (4) is slidably fitted in the stepped hole (31), wherein the insert (7) is provided at one end of the core-pulling insert (4) close to the stepped hole (31), and a limiting head (41) is extended from one end of the core-pulling insert (4) away from the stepped hole (31). The core-pulling insert (4) is sleeved with a spring (42), and the two ends of the spring (42) respectively contact the stepped hole (31) and the limit head (41) to force the core-pulling insert (4) to move away from the front template (1). One side of the limit head (41) is provided with a stopper (5) for limiting the maximum movement range of the limit head (41). The front template (1) is provided with a front mold shovel (6) that cooperates with the limit head (41), so that the core-pulling insert (4) drives the insert (7) to pass through the stepped hole (31) and cooperate with the front template (1).

2. The insert inner-drawing mechanism for an injection mold according to claim 1, characterized in that: One end of the front mold shovel (6) is fixedly connected to the front mold plate (1); the other end of the front mold shovel (6) is provided with a first inclined surface (61) on a side close to the limiting head (41); the side of the limiting head (41) close to the first inclined surface (61) is provided with a second inclined surface (411) parallel to the first inclined surface (61); when the front mold shovel (6) is close to the limiting head (41), the first inclined surface (61) and the second inclined surface (411) are pressed against each other and push the core-pulling insert (4) to move toward the stepped hole (31).

3. The insert inner-drawing mechanism for an injection mold according to claim 2, characterized in that: The fixed block (3) is provided with an opening (32) for the front mold shovel machine (6) to pass through.

4. The insert inner-drawing mechanism for an injection mold according to claim 1, characterized in that: The stopper (5) is provided with a limiting guide groove (51) that matches the front mold shovel machine (6).

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