A front mold inclined position structure for an injection mold

Abstract

The utility model relates to the technical field of injection molding process especially is used to a front mould oblique position structure for injection mould, including the front mould fixed plate, the water gap board, the backing plate, the front mould frame and the front mould kernel that set up in proper order, still include the front mould insert piece and the row position guide pillar, the front mould insert piece is worn and is set in the front mould kernel, and under the guidance of the mould kernel inclined plane of front mould kernel, oblique inserts injection molding cavity, thereby injection molding forms the oblique recess of plastic part, the one end of row position guide pillar is fixedly connected in the water gap board, its other end passes through the backing plate and the front mould frame, and with the front mould insert piece forms the lock joint of movable, makes row position guide pillar drive front mould insert piece and exits from the oblique recess. Above all, the utility model through the lock joint and water gap board linkage drive of ingenuity, has simplified the mould structure significantly, has improved injection molding efficiency, has guaranteed the plastic part forming quality. Its modular design and high performance price ratio make it easy to manufacture, maintain and market promotion.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molding process, and in particular to a front mold inclined slide structure for injection mold. Background Technology

[0002] With the continuous expansion of applications for plastic products, injection molding technology is also constantly advancing. As a key piece of equipment for achieving high-quality and efficient manufacturing of plastic parts, the structural design of injection molds directly affects the precision, efficiency, and lifespan of injection molding. For products containing complex, deep, and angled grooves, traditional injection molds often employ side core pulling, side parting, or slider structures. While these solutions can achieve demolding of plastic parts, they have the following shortcomings:

[0003] Complex structure and difficult manufacturing: Traditional side core pulling mechanisms usually rely on multiple guide pillars, sliders and linkage devices. The mold structure is complex and the manufacturing process is difficult, resulting in a long mold manufacturing cycle and high cost.

[0004] The large size of the mold restricts the selection of injection molding machines and production layout: multiple guide rods and slider mechanisms often lead to a bulky front mold structure, increasing the size and weight of the mold, which is not conducive to quick mold change and the layout of automated production lines.

[0005] Low injection molding efficiency: Complex demolding mechanisms require multiple linked actions during mold opening and closing, affecting the speed of mold opening and closing and reducing the efficiency of injection molding cycles.

[0006] Limited molding quality: Due to the complexity of the demolding mechanism and the gaps between multiple parts, the cavity may not be properly sealed, affecting the surface quality and dimensional accuracy of the plastic parts. In particular, the precision control of structures such as inclined grooves is more difficult.

[0007] Given the aforementioned technical bottlenecks, the industry urgently needs an injection mold structure that is simple in structure, low in cost, highly efficient in molding, and suitable for deep and sloping groove plastic parts, in order to improve the industrialization level and economic benefits of injection molding production. Utility Model Content

[0008] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0009] This utility model provides a front mold inclined slide structure for injection molds, further comprising a front mold fixing plate, a sprue plate, a backing plate, a front mold frame, and a front mold core arranged in sequence, and also including a front mold insert and a slide guide post. The front mold insert passes through the front mold core and, guided by the inclined surface of the front mold core, is inclinedly inserted into the injection cavity, thereby injection molding an inclined groove for the plastic part. One end of the slide guide post is fixed to the sprue plate, and the other end passes through the backing plate and the front mold frame, forming a movable snap-fit ​​connection with the front mold insert, so that the slide guide post drives the front mold insert to exit from the inclined groove.

[0010] Furthermore: One end of the guide post connected to the front mold insert is provided with a main snap-fit, and the end of the front mold insert corresponding to the main snap-fit ​​is provided with a movable snap-fit. The movable snap-fit ​​and the main snap-fit ​​cooperate with each other to form a snap-fit ​​connection, and the movable snap-fit ​​can slide a certain distance along the main snap-fit ​​while maintaining the snap-fit ​​connection.

[0011] Furthermore, the front mold insert is also equipped with a lateral spring. One end of the lateral spring abuts against the front mold core, and the other end abuts against the front mold insert. Its elastic force drives the front mold insert to move away from the injection cavity. The front mold core is equipped with an insert slot and a lateral stop. The insert slot is used to accommodate the front mold insert, and the lateral stop is set at the opening of the insert slot to prevent the front mold insert from dislodging from the insert slot.

[0012] Furthermore, the guide post is provided with a first inclined surface at one end facing the front mold insert. The first inclined surface is used to abut and press against the top surface of the front mold insert when the mold is closed.

[0013] Furthermore, it also includes a pressure block, one end of which is fixed to the sprue plate, and the other end of which is provided with a second inclined surface. The second inclined surface is used to abut against and press the top surface of the front mold insert when the mold is closed.

[0014] Furthermore: the main buckle position is provided with a first hook tongue and a first hook groove, and the movable buckle position is provided with a second hook tongue and a second hook groove. The first hook tongue is embedded in the second hook groove, and the second hook tongue is embedded in the first hook groove, thereby forming a buckling connection, and the second hook tongue can slide along the buckling surface.

[0015] Furthermore: the engagement surfaces of the main snap-fit ​​and the movable snap-fit ​​are perpendicular to the inclined surface of the front mold core.

[0016] Furthermore: the front mold insert is provided with an insert block and a snap-fit ​​seat. One end of the insert block is fixed to the snap-fit ​​seat, and the other end is inserted into the front mold core to form an injection cavity; one end of the snap-fit ​​seat is fixed to the insert block, and the other end is used to set a movable snap-fit.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Simplified mold structure: The front mold insert guided by the inclined plane is connected to the slide guide pillar, avoiding complex mechanisms such as multi-linked sliders, making the mold structure more compact and simple.

[0019] 2. Improve injection molding efficiency: By utilizing the opening and closing movement of the sprue plate to drive the oblique movement of the slide guide pillars and the front mold insert, the number of opening and closing action steps is reduced, the injection molding cycle is shortened, and production efficiency is improved.

[0020] 3. Achieve reliable molding and demolding of complex inclined grooves: The front mold insert is inserted and withdrawn obliquely along the inclined surface of the mold core, ensuring that the inclined groove of the plastic part is completely molded and demolded smoothly, avoiding deformation and damage.

[0021] 4. Enhanced cavity sealing performance: The uniform pressing of multi-directional pressure blocks ensures a tight fit between the insert and the front mold core, improving cavity sealing and the quality of molded plastic parts.

[0022] 5. Reduced manufacturing and maintenance costs: The modular design of the front mold insert facilitates replacement and maintenance, reduces maintenance time and costs, adapts to various plastic part specifications, and offers high flexibility.

[0023] 6. Ingenious structural design, easy to market: The structure is simple and practical, easy to industrialize and promote, and suitable for meeting the needs of modern injection molding industry for efficient, high-quality and low-cost molds.

[0024] Through the aforementioned improvements, this invention significantly simplifies the mold structure, improves injection molding efficiency, and ensures the quality of molded parts by ingeniously using a snap-fit ​​connection and a sprue plate linkage drive. Its modular design and high cost-effectiveness make it easy to manufacture, maintain, and market.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a structural schematic diagram of the front mold core and the front mold insert of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the mold core inclined surface and the insert hole groove of this utility model;

[0029] Figure 3 This is a structural schematic diagram of the lateral spring and movable latch of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the sliding guide post and pressure block of this utility model;

[0031] Figure 5 This is a cross-sectional schematic diagram of the main buckle position of this utility model;

[0032] Figure 6 This is a cross-sectional schematic diagram of the sprue plate and the guide post of this utility model;

[0033] Figure 7 This is a cross-sectional schematic diagram of the mold-open state of this utility model.

[0034] The reference numerals and names in the figure are as follows:

[0035] 10 Front mold fixing plate; 11 Sprue plate; 12 Pad plate; 13 Front mold frame; 14 Pressure block; 15 Second inclined surface; 20 Front mold core; 21 Mold core inclined surface; 22 Insert hole slot; 23 Side stop block; 30 Front mold insert; 31 Side spring; 32 Movable snap-fit; 33 Second hook tongue; 34 Second hook groove; 35 Insert block; 36 Snap-fit ​​seat; 40 Slide guide post; 41 First inclined surface; 42 Main snap-fit; 43 First hook tongue; 44 First hook groove; 50 Plastic part. Detailed Implementation

[0036] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] Please see Figures 1 to 7 In this embodiment of the present invention, a front mold inclined sliding structure for an injection mold includes a front mold fixing plate 10, a sprue plate 11, a pad plate 12, a front mold frame 13, and a front mold core 20 arranged sequentially. It also includes a front mold insert 30 and a sliding guide post 40. The front mold insert 30 passes through the front mold core 20 and is inclinedly inserted into the injection cavity under the guidance of the mold core inclined surface 21 of the front mold core 20, thereby injection molding an inclined groove of the plastic part 50. One end of the sliding guide post 40 is fixed to the sprue plate 11, and the other end passes through the pad plate 12 and the front mold frame 13, forming a movable snap-fit ​​connection with the front mold insert 30, so that the sliding guide post 40 drives the front mold insert 30 to exit from the inclined groove.

[0038] Specifically, in the injection mold industry, side core pulling or side parting is usually used to demold undercut, recessed, and other parts of the product. However, for relatively deep sloping grooves on plastic parts 50, injection molding using side core pulling or side parting mold structures can easily lead to a very complex mold structure, reduce injection molding efficiency, and increase mold costs.

[0039] This invention features a front mold insert 30 that can move obliquely a certain distance within the front mold core 20. During mold closing, guided by the inclined surface 21 of the front mold core 20, the insert smoothly inserts obliquely into the front mold core 20, forming the corresponding injection cavity and thus injection molding the oblique groove on the plastic part 50. During mold opening, a sliding guide post 40 is provided. Utilizing a variable-position fastening connection, the sliding guide post 40 can both drive the front mold insert 30 during mold opening and allow the insert to move obliquely a certain distance under the reverse guidance of the inclined surface 21, smoothly exiting the oblique groove and completing the mold opening operation.

[0040] This structure cleverly utilizes the movement of the sprue plate 11 during mold opening and closing to drive the sliding guide pillars 40 to open and close the front mold insert 30. Through a movable and repositionable interlocking connection, the front mold insert 30 can perform both mold closing and injection molding operations, as well as mold opening and exit operations. Furthermore, its ingenious design, simple structure, high injection molding efficiency, and low mold manufacturing cost make it suitable for market promotion.

[0041] like Figure 3 , Figure 5 and Figure 6 As shown, preferably, the end of the guide post 40 connected to the front mold insert 30 is provided with a main snap-fit ​​position 42, and the end of the front mold insert 30 corresponding to the main snap-fit ​​position 42 is provided with a movable snap-fit ​​position 32. The movable snap-fit ​​position 32 and the main snap-fit ​​position 42 cooperate with each other to form a snap-fit ​​connection, and the movable snap-fit ​​position 32 can slide a certain distance along the main snap-fit ​​position 42 while maintaining the snap-fit ​​connection.

[0042] Specifically, to achieve the snap-fit ​​connection, a main snap-fit ​​42 is preferably provided at one end of the guide post 40, and a movable snap-fit ​​32 is provided at the corresponding end of the front mold insert 30. This allows the movable snap-fit ​​32 to be pulled and moved by the main snap-fit ​​42. While maintaining the pulled connection, the movable snap-fit ​​32 can also slide a certain distance along the main snap-fit ​​42, thereby changing its positional relationship. Guided by the inclined surface 21 of the mold core 20, it exits from the inclined groove of the molded plastic part 50, smoothly completing the mold opening operation. That is, after sliding a certain distance, the front mold insert 30 can continue to be pulled by the guide post 40.

[0043] Secondly, after the guide post 40 continues to pull the front mold insert 30 to move obliquely a certain distance, the lateral position of the front mold insert 30 changes, thereby causing the movable snap-fit ​​32 to disengage from the snap-fit ​​surface of the main snap-fit ​​42, separating the snap-fit ​​connection between the two, allowing the guide post 40 to continue to move in the mold opening direction, while the front mold insert 30 remains in the front mold core 20, waiting for the next mold closing operation.

[0044] like Figures 1 to 3 As shown, preferably, the front mold insert 30 is also provided with a lateral spring 31. One end of the lateral spring 31 abuts against the front mold core 20, and the other end abuts against the front mold insert 30. Its elastic force drives the front mold insert 30 to move away from the injection cavity. The front mold core 20 is provided with an insert slot 22 and a lateral stop 23. The insert slot 22 is used to accommodate the front mold insert 30, and the lateral stop 23 is provided at the opening of the insert slot 22 to prevent the front mold insert 30 from dislodging from the insert slot 22.

[0045] Specifically, during mold closing, it is necessary to ensure that the front mold insert 30 and the sliding guide post 40 can re-establish a snap-fit ​​connection. Therefore, a lateral spring 31 can be installed on the front mold insert 30. The elastic force of the lateral spring 31 drives the front mold insert 30 to remain in an outward disengaged state, ensuring that during the mold closing process, when the end of the sliding guide post 40 with the main snap 42 moves downward, the movable snap 32 will not interfere with or hinder the formation of a snap-fit ​​connection between the main snap 42 and the movable snap 32. That is, during the mold closing movement, the end of the sliding guide post 40 with the main snap 42 first contacts the end of the front mold insert 30 with the movable snap 32, thereby causing the vertical movement of the sliding guide post 40 to drive the front mold insert 30 to move synchronously. Under the limitation and guidance of the mold core inclined surface 21 of the front mold core 20, the front mold insert 30 moves laterally towards the injection cavity and re-inserts into the insert hole slot 22 of the front mold core 20, completing the enclosure of the injection cavity.

[0046] Secondly, in order to prevent the front mold insert 30 from detaching from the front mold core 20 under the elastic force of the side spring 31, a side stop 23 can be installed on the side wall of the insert slot 22 facing the guide post 40. The side stop 23 can block the front mold insert 30, and the side stop 23 is preferably fixed to the front mold core 20 with bolts.

[0047] like Figure 4 As shown, preferably, the end of the slide guide post 40 facing the front mold insert 30 is also provided with a first inclined surface 41, which is used to abut and press against the top surface of the front mold insert 30 when the mold is closed.

[0048] Specifically, when the guide post 40 moves during mold closing, the end that first contacts the front mold insert 30 may also be provided with a first inclined surface 41 for abutting the top surface of the front mold insert 30. After mold closing is completed, the first inclined surface 41 continues to press against the top surface of the front mold insert 30, so that the front mold insert 30 and the front mold core 20 form a tight fit and connection, and cooperate with the rear mold core (not shown in the figure) to form an injection cavity.

[0049] like Figure 4 As shown, preferably, it also includes a pressure block 14, one end of which is fixed to the sprue plate 11, and the other end of which is provided with a second inclined surface 15. The second inclined surface 15 is used to abut against and press the top surface of the front mold insert 30 when the mold is closed.

[0050] Specifically, in order to optimize the contact and pressing of the front mold insert 30, preferably, four pressure blocks 14 are also provided around the slide guide post 40, and a second inclined surface 15 is provided at the bottom of the pressure block 14. Through the second inclined surface 15 at the bottom of the four pressure blocks 14, pressure is applied to the top surface of the front mold insert 30 from four directions, which enhances the tightness of the fit between the front mold insert 30 and the front mold core 20 and ensures the sealing of the injection cavity.

[0051] like Figure 3 and Figure 5 As shown, preferably, the main buckle 42 is provided with a first hook tongue 43 and a first hook groove 44, and the movable buckle 32 is provided with a second hook tongue 33 and a second hook groove 34. The first hook tongue 43 is embedded in the second hook groove 34, and the second hook tongue 33 is embedded in the first hook groove 44, thereby forming a buckling connection, and the second hook tongue 33 can slide along the buckling surface.

[0052] Specifically, in order to form a mutually engaging connection between the main latch 42 and the movable latch 32, it is preferable to provide a first hook tongue 43 in the main latch 42, and form a first hook groove 44 between it and the main body of the sliding guide post 40. Similarly, a second hook tongue 33 is provided in the movable latch 32, and forms a second hook groove 34 between it and the main body of the movable latch 32, so that the first hook tongue 43 can be inserted into the second hook groove 34 to a certain depth, and the second hook tongue 33 can be inserted into the first hook groove 44 to a certain depth, thereby forming a latching connection between the first hook tongue 43 and the second hook tongue 33, and thus allowing the sliding guide post 40 to pull the front mold insert 30 to move in the mold opening direction.

[0053] Secondly, due to the limitation of the mold core slope 21 of the front mold core 20, the front mold insert 30 cannot move parallel to the mold opening direction, but can only move obliquely along the mold core slope 21. Therefore, the second hook tongue 33 of the movable latch 32 needs to be set to slide a certain distance along the latching surface so that it can move obliquely smoothly.

[0054] like Figure 6As shown, preferably, the engagement surface of the main snap-fit ​​position 42 and the movable snap-fit ​​position 32 is perpendicular to the mold core inclined surface 21 of the front mold core 20.

[0055] Specifically, in order to make the movable snap fastener 32 slide more smoothly along the snap-fit ​​surface when it moves laterally, it is preferable to set the snap-fit ​​surface to be perpendicular to the mold core inclined surface 21, so that when the first hook tongue 43 of the main snap fastener 42 pulls the movable snap fastener 32, it can drive the movable snap fastener 32 to move along the snap-fit ​​surface more smoothly.

[0056] like Figure 3 As shown, preferably, the front mold insert 30 is provided with an insert block 35 and a snap-fit ​​seat 36. One end of the insert block 35 is fixed to the snap-fit ​​seat 36, and the other end of the insert block 35 is inserted into the front mold core 20 to form an injection cavity. One end of the snap-fit ​​seat 36 is fixed to the insert block 35, and the other end of the snap-fit ​​seat 36 is used to set the movable snap-fit ​​32.

[0057] Specifically, for ease of manufacturing, maintenance, and replacement, the front mold insert 30 is preferably configured as a two-piece assembly. This involves separating the snap-fit ​​seat 36 (with the movable snap-fit ​​32) from the insert block 35, and then fixing them together with bolts to form a single unit. In subsequent production, when different plastic parts 50 with different lateral grooves need to be produced, the corresponding insert block 35 can be directly replaced. Alternatively, after prolonged production, if the movable snap-fit ​​32 wears down, the snap-fit ​​seat 36 can be directly replaced.

[0058] like Figure 7 As shown, preferably, when the mold is opened, the front mold fixing plate 10 and the sprue plate 11 first move in the mold opening direction, for example, move by five millimeters, so that the main buckle 42 of the slide guide post 40 pulls the movable buckle 32 of the front mold insert 30, and under the guidance of the mold core inclined surface 21, the front mold insert 30 moves obliquely and exits from the oblique groove of the plastic part 50.

[0059] Meanwhile, under the elastic force of the side spring 31, the front mold insert 30 continues to move obliquely, causing the movable snap-fit ​​32 to disengage from the pull of the main snap-fit ​​42. That is, in the direction parallel to the mold opening, the main snap-fit ​​42 and the movable snap-fit ​​32 disengage from each other, allowing the slide guide post 40 to continue to move in the mold opening direction. The front mold insert 30 is blocked by the side stop 23 and stays in the insert hole groove 22 of the front mold core 20.

[0060] Subsequently, the pad plate 12, the front mold base 13, and the front mold core 20, driven by other existing mold opening structures (not shown in the figure), together with the front mold fixing plate 10 and the sprue plate 11, make the final mold opening movement, adding up the entire mold opening stroke.

[0061] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A front mold slant slide structure for injection molds, characterized in that, The mold includes a front mold fixing plate (10), a sprue plate (11), a pad plate (12), a front mold frame (13), and a front mold core (20) arranged in sequence. It also includes a front mold insert (30) and a sliding guide post (40). The front mold insert (30) passes through the front mold core (20) and is inserted obliquely into the injection cavity under the guidance of the mold core inclined surface (21) of the front mold core (20), thereby injection molding the oblique groove of the plastic part (50). One end of the sliding guide post (40) is fixed to the sprue plate (11), and the other end passes through the pad plate (12) and the front mold frame (13) to form a movable snap-fit ​​connection with the front mold insert (30), so that the sliding guide post (40) drives the front mold insert (30) to exit from the oblique groove.

2. The front mold inclined slide structure for injection molds according to claim 1, characterized in that, The guide post (40) is connected to the front mold insert (30) at one end with a main snap-fit ​​(42). The front mold insert (30) is connected to the main snap-fit ​​(42) at one end with a movable snap-fit ​​(32). The movable snap-fit ​​(32) and the main snap-fit ​​(42) cooperate with each other to form a snap-fit ​​connection. The movable snap-fit ​​(32) can slide a certain distance along the main snap-fit ​​(42) while maintaining the snap-fit ​​connection.

3. The front mold inclined slide structure for injection molds according to claim 1, characterized in that, The front mold insert (30) is also provided with a side spring (31). One end of the side spring (31) abuts against the front mold core (20) and the other end abuts against the front mold insert (30). Its elastic force drives the front mold insert (30) to move away from the injection cavity. The front mold core (20) is provided with an insert slot (22) and a side stop (23). The insert slot (22) is used to accommodate the front mold insert (30). The side stop (23) is set at the opening of the insert slot (22) to prevent the front mold insert (30) from dislodging from the insert slot (22).

4. The front mold slant slide structure for injection molds according to claim 1, characterized in that, The guide post (40) facing the front mold insert (30) is also provided with a first inclined surface (41), which is used to abut and press against the top surface of the front mold insert (30) when the mold is closed.

5. The front mold inclined slide structure for injection molds according to claim 1, characterized in that, It also includes a pressure block (14), one end of which is fixed to the sprue plate (11), and the other end of which is provided with a second inclined surface (15). The second inclined surface (15) is used to abut and press the top surface of the front mold insert (30) when the mold is closed.

6. The front mold slant slide structure for injection molds according to claim 1, characterized in that, The main buckle (42) is provided with a first hook tongue (43) and a first hook groove (44), and the movable buckle (32) is provided with a second hook tongue (33) and a second hook groove (34). The first hook tongue (43) is embedded in the second hook groove (34), and the second hook tongue (33) is embedded in the first hook groove (44), thereby forming a buckling connection, and the second hook tongue (33) can slide along the buckling surface.

7. The front mold inclined slide structure for injection molds according to claim 2, characterized in that, The engagement surfaces of the main snap-fit ​​position (42) and the movable snap-fit ​​position (32) are perpendicular to the mold core inclined surface (21) of the front mold core (20).

8. The front mold slant slide structure for injection molds according to claim 1, characterized in that, The front mold insert (30) is provided with insert block (35) and snap seat (36). One end of insert block (35) is fixed to snap seat (36), and the other end is inserted into the front mold core (20) to form an injection cavity. One end of snap seat (36) is fixed to insert block (35), and the other end is used to set the movable snap seat (32).

Images