CN221873012U - Rear mould ejection mechanism - Google Patents

Abstract

The utility model discloses a rear mold ejection mechanism, including a driven mold group, a fixed mold group that fixes a demoulding core body and limits the stroke of the driven mold group, and a movable mold group that drives the driven mold group to move so that the demoulding core body is separated from the driven mold group and the driven mold group is demoulded in a limited state. The utility model drives the driven mold group through the movable mold group, so that the driven mold group is relatively displaced relative to the fixed mold group, so that the demoulding core body fixed on the fixed mold group is separated from the driven mold group, and the driven mold group continues to move in the limited state to demould the product. The technical solution has high continuity in the operation process of ejecting the demoulding core body and ejecting the product, which can realize effective demoulding and automatic falling off of the product, saving injection molding time and cost, and effectively improving the quality of mold products. The technical solution can solve the problem that plastic products cannot fall off automatically after one ejection, and is suitable for the application of products with extremely high precision requirements for related internal features.

Description

A rear mold ejection mechanism

Technical Field

The utility model belongs to the technical field of injection molding equipment, and in particular relates to a rear mold ejection mechanism.

Background Art

In the injection molds of automobile interior and exterior assembly plastic parts or other plastic parts, there are products with many structural features. Such products have thin outer walls and many and deep features inside. The surface quality requirements cannot be met through ordinary left and right conventional mold opening. It is necessary to design a mechanism to demold the internal core of the product before ejecting the product. In this way, when the plastic parts are opened and ejected, it is possible to avoid the plastic parts adhering to the mold core and not being able to fall off automatically, resulting in the risk of product distortion and mold parts breaking. Now more and more automation is used, so for such structures that cannot be ejected automatically by one-time mold opening and closing, it is particularly important to design a mechanism that first demolds the core and then ejects, so that the product can be effectively ejected and automatically fall off.

Utility Model Content

The purpose of the utility model is to provide a rear mold ejection mechanism to solve the above technical problems. The movable mold group drives the driven mold group, so that the driven mold group is relatively displaced relative to the fixed mold group, so that the demoulding core fixed on the fixed mold group is separated from the driven mold group, thereby completing the operation of first ejecting the demoulding core body. After completing the operation of ejecting the demoulding core body, the fixed mold group forms a limit on the driven mold group, so that the driven mold group continues to move the movable mold group to demould the product under the limited state, thereby completing the process of first ejecting the demoulding core body and then ejecting the product. The technical solution has high continuity in the operation process of ejecting the demoulding core body and ejecting the product, which can realize the effective demoulding and automatic falling off of the product, saving injection molding time and cost, and effectively improving the quality of mold products. The technical solution can solve the problem that plastic products cannot automatically fall off after one ejection, and is suitable for the application of products with extremely high precision requirements for related internal features.

In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

A rear mold ejection mechanism includes a driven mold group, a fixed mold group that fixes a demoulding core body and limits the stroke of the driven mold group, and a movable mold group that drives the driven mold group to move so that the demoulding core body is separated from the driven mold group and the driven mold group is demoulded in a limited state. A demoulding rod is set at one end of the movable mold group, and the driven mold group is driven by the movable mold group to make the driven mold group relatively displaced relative to the fixed mold group, so that the demoulding core body fixed on the fixed mold group is separated from the driven mold group, thereby completing the operation of first ejecting the demoulding core body. After completing the operation of ejecting the demoulding core body, the fixed mold group forms a limit on the driven mold group, so that the driven mold group continues to move the movable mold group in the limited state to demould the product, thereby completing the process of first ejecting the demoulding core body and then ejecting the product. The technical solution has high continuity in the operation process of ejecting the demoulding core body and ejecting the product, which can realize effective demoulding and automatic falling of the product, saving injection molding time and cost, and effectively improving the quality of mold products. This technical solution can solve the problem that plastic products cannot automatically fall off after being ejected once, and is suitable for applications where the relevant internal features have extremely high precision requirements.

Preferably, the movable mold group includes a push rod and a moving module connected to the push rod; the driven mold group includes an auxiliary plate connected to one end of the moving module, and a B plate connected to the auxiliary plate and moving synchronously with the auxiliary plate; the fixed mold group includes a square iron arranged corresponding to one side of the auxiliary plate, and a B plate sub-plate arranged on one side of the square iron and fixing the demolding core body, and the B plate, B plate sub-plate, square iron, moving module, and auxiliary plate are arranged in sequence in the opposite direction of the ejection process. The B plate, B plate sub-plate, square iron, moving module and auxiliary plate are arranged in sequence. When the moving module drives the auxiliary plate to move synchronously, the B plate is moved, so that the B plate and the B plate sub-plate move relative to each other, so that the demoulding core is ejected from the B plate while the product remains in the B plate. The square iron is arranged corresponding to the auxiliary plate to limit the moving stroke of the auxiliary plate. Under the stroke restriction of the square iron on the auxiliary plate, the B plate is restricted and cannot move, and the ejector rod continues to move to drive the moving module to continue to move, thereby ejecting the product from the B plate. The technical solution has high continuity in the operation process of ejecting the demoulding core and ejecting the product, can realize the effective demolding and automatic falling off of the product, saves injection molding time and cost, and effectively improves the quality of mold products.

Preferably, the mobile module includes an ejector panel, an ejector base plate fixedly connected to the ejector panel, the ejector base plate is fixedly connected to the ejector rod, and the ejector base plate is movably connected to the auxiliary plate. One end of the ejector rod is in conflict with one side of the ejector panel. The ejector panel and the ejector base plate are arranged, and the ejector base plate is fixedly connected to the ejector rod, so that the mobile module as a whole can move synchronously with the ejector rod, and the ejector base plate is connected to the ejector panel at the same time, so as to increase the contact area of the transmission and improve the movement stability of the ejector panel, wherein the ejector base plate is movably connected to the auxiliary plate, so that after the mobile module moves a certain distance, the auxiliary plate releases the connection between the ejector base plate and the auxiliary plate under the limiting action of the square iron, thereby completing the pre-ejection of the demoulding core body, and then completing the multi-stage operation of ejecting the product. The technical solution has high continuity in the operation process of ejecting the demoulding core body and ejecting the product, and can realize that the product can be effectively ejected and automatically fall off, saving injection molding time and cost, and effectively improving the quality of mold products.

Preferably, the ejector panel is connected to the ejector pins that penetrate the B plate and the B plate sub-plate. The ejector pins are arranged in multiple groups, and the ejector pins penetrate the space formed between the square irons, the B plate sub-plate and the B plate, and can move in the space formed between the square irons, inside the B plate sub-plate and inside the B plate; the ejector panel is provided with ejectors, and after the ejection of the demoulding core body is completed, the ejector pins are used to eject the product in the B plate in a state where the B plate is limited in stroke. This product ejection process is simple, and the product can be effectively ejected from the mold and automatically fall off, saving injection time and cost, and effectively improving the quality of mold products.

Preferably, the ejector bottom plate is connected to a nylon buckle, and one end of the nylon buckle is connected to the auxiliary plate. The ejector bottom plate and the auxiliary plate are connected by the nylon buckle, so that the auxiliary plate can move with the ejector panel. When the auxiliary plate contacts the square iron for limiting, the nylon buckle is provided to release the connection between the ejector bottom plate and the auxiliary plate, so that the auxiliary plate can continue to move the moving module in the limited state. Since the auxiliary plate is fixedly connected to the B plate, the B plate is in a stationary state. When the moving module continues to move, the product in the stationary B plate is ejected, thereby completing the pre-ejection of the demoulding core body, and then completing the multi-stage operation of ejecting the product. The technical solution has high continuity in the operation process of ejecting the demoulding core body and ejecting the product, and can realize that the product can be effectively ejected and automatically fall off, saving injection molding time and cost, and effectively improving the quality of mold products.

Preferably, the square iron is provided with a conflict groove for limiting the travel of the auxiliary plate; the square iron is arranged in groups, and a moving channel for providing movement of the mobile module is arranged between the square irons. The two ends of the auxiliary plate are arranged corresponding to the conflict groove. The conflict groove corresponds to the two ends of the auxiliary plate. When the auxiliary plate moves a certain distance, one end of the conflict groove conflicts with the auxiliary plate to limit the auxiliary plate, thereby limiting the auxiliary plate from continuing to move. When the ejector rod continues to move, the nylon buckle connecting the ejector base plate and the auxiliary plate is disengaged, thereby releasing the connection between the ejector base plate and the auxiliary plate, so that the mobile module of the auxiliary plate can continue to move under the limited state. At the same time, the moving channel between the square irons prevents the square irons from interfering with the moving path of the mobile module.

Preferably, the length of the ejector panel and the ejector bottom plate in a direction perpendicular to the ejection direction is less than the length of the auxiliary plate. The length of the ejector panel and the ejector bottom plate is sufficient to move in the moving channel formed between the square irons, wherein the length of the auxiliary plate is sufficient to limit the stroke of the interference groove.

Preferably, the auxiliary plate is fixedly connected to the auxiliary plate locking bolt, one end of the auxiliary plate locking bolt is connected to the B plate locking bolt, and the B plate locking bolt is connected to the B plate. The auxiliary plate is connected to the B plate through the auxiliary plate locking bolt and the B plate locking bolt, and the B plate is driven to move when the auxiliary plate moves; when the auxiliary plate is limited in stroke, the B plate is kept stationary, the moving module continues to move, and the ejector continues to move to eject the product.

Preferably, the B plate sub-plate is connected to a spring, one end of which is in conflict with the moving module. The spring is sleeved on the outer surface of the auxiliary plate locking bolt; wherein one end of the spring is in conflict with the surface of one side of the ejector panel. The provision of the spring is conducive to the auxiliary plate and the moving module returning to the initial position under the action of the thrust of the ejector rod, which is convenient for the preparation of the next injection molding demoulding process.

Preferably, the rear mold ejection mechanism further includes a lower fixing plate, which is arranged on one side of the auxiliary plate. The ejector rod passes through the lower fixing plate, wherein one side of the lower fixing plate contacts one side of the square iron. The lower fixing plate is provided to facilitate the stability of the overall structure, and the ejector rod passes through the lower fixing plate, so that the lower fixing plate limits the moving direction of the ejector rod to prevent the ejector rod from shaking.

This application has achieved beneficial technical effects:

The utility model drives the driven module through the moving module, so that the driven module is relatively displaced with respect to the fixed module, so that the demoulding core fixed on the fixed module is separated from the driven module, thereby completing the operation of first demoulding the demoulding core. After completing the operation of demoulding the demoulding core, the fixed module forms a limit on the driven module, so that the driven module continues to move the moving module to demould the product under the limit state, thereby completing the process of first demoulding the demoulding core and then ejecting the product. The technical solution has high continuity in the operation process of demoulding the demoulding core and ejecting the product, which can realize the effective demoulding and automatic falling off of the product, saving injection molding time and cost, and effectively improving the quality of mold products. The technical solution can solve the problem that plastic products cannot automatically fall off after one ejection, and is suitable for the application of products with extremely high precision requirements for related internal features.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram showing the structure of the present utility model;

FIG2 is a schematic diagram of a cross-sectional structure along the line A-A of FIG1 ;

FIG3 is a bottom view of the structure of the present invention;

FIG4 is a schematic diagram of the product structure of the utility model;

FIG5 is a schematic diagram of a cross-sectional structure taken along the line B-B of FIG4 ;

FIG6 is a schematic diagram of the side structure of the product;

FIG7 is a schematic diagram of the rear view structure of the product;

FIG. 8 is another schematic diagram showing the product structure of the product.

Figure numerals: 1. upper fixed plate, 2. A plate, 3. B plate, 4. B plate sub-plate, 5. square iron, 6. ejector panel, 7. ejector bottom plate, 8. auxiliary plate, 9. lower fixed plate, 10. auxiliary plate locking bolt, 11. ejector, 12. ejector plate locking bolt, 13. B plate locking bolt, 14. demoulding core, 15. product, 16. nylon buckle, 17. ejector rod, 18. spring, 51. moving channel, 52. resistance groove.

DETAILED DESCRIPTION

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

The technical solution of the utility model is described in detail below with specific embodiments.

Example 1

As shown in Figures 1 to 8, a rear mold ejection mechanism includes a driven mold group, a fixed mold group that fixes the demolding core 14 and limits the stroke of the driven mold group, and a movable mold group that drives the driven mold group to move so that the demolding core 14 is separated from the driven mold group and the driven mold group is demolded in a limited state. A demoulding rod 17 is provided at one end of the movable mold group, and the movable mold group drives the driven mold group, so that the driven mold group is relatively displaced relative to the fixed mold group, and the demoulding core 14 fixed on the fixed mold group is separated from the driven mold group, thereby completing the operation of first demoulding the demoulding core 14. After completing the operation of demoulding the demoulding core 14, the fixed mold group forms a limit on the driven mold group, so that the driven mold group continues to move the movable mold group to demould the product 15 under the limited state, thereby completing the process of first demoulding the demoulding core 14 and then ejecting the product. The technical solution has high continuity in the operation process of ejecting the demoulding core and ejecting the product, which can realize the effective demoulding and automatic falling off of the product, saving injection molding time and cost, and effectively improving the quality of mold products. This technical solution can solve the problem that plastic products cannot automatically fall off after one ejection, and is suitable for the application of products with extremely high precision requirements for related internal features.

The movable die set includes a push rod 17 and a moving module connected to the push rod 17; the driven die set includes an auxiliary plate 8 connected to one end of the moving module, and a B plate 3 connected to the auxiliary plate 8 and moving synchronously with the auxiliary plate 8; the fixed die set includes a square iron 5 arranged corresponding to one side of the auxiliary plate 8, and a B plate sub-plate 4 arranged on one side of the square iron 5 and fixing the demoulding core 14, and the B plate 3, the B plate sub-plate 4, the square iron 5, the moving module, and the auxiliary plate 8 are arranged in sequence in the opposite direction of the ejection process. The B plate sub-plate 4 is connected to the auxiliary plate 8, wherein the B plate sub-plate 4 fixes the demoulding core. One side of the square iron 5 is in conflict with one side of the B plate sub-plate 4; the B plate 3, the B plate sub-plate 4, the square iron 5, the moving module, and the auxiliary plate 8 are arranged in sequence, and when the moving module drives the auxiliary plate 8 to move synchronously, the B plate 3 is moved, so that the B plate 3 and the B plate sub-plate 4 move relative to each other, so that the demoulding core 14 is ejected from the B plate 3 and the product 15 remains in the B plate 3, and the square iron 5 is arranged corresponding to the auxiliary plate 8 to limit the moving stroke of the auxiliary plate 8. Under the stroke restriction of the square iron 5 on the auxiliary plate 8, the B plate 3 is restricted and cannot move, and the ejector rod 17 continues to move, thereby driving the moving module to continue to move, thereby ejecting the product from the B plate 3. The technical solution has high continuity in the operation process of ejecting the demoulding core 14 and ejecting the product, which can realize the effective demolding and automatic falling off of the product, saving injection molding time and cost, and effectively improving the quality of mold products.

The mobile module includes an ejector panel 6, an ejector bottom plate 7 fixedly connected to the ejector panel 6, the ejector bottom plate 7 is fixedly connected to an ejector rod 17, and the ejector bottom plate 7 is movably connected to an auxiliary plate 8. One end of the ejector rod 17 contacts one side of the ejector panel 6. The ejector panel 6 and the ejector bottom plate 7 are connected by the ejector plate locking bolt 12, and the ejector panel 6 and the ejector bottom plate 7 are provided, and the ejector bottom plate 7 is fixedly connected with the ejector rod 17, so that the moving module as a whole can move synchronously with the ejector rod 17, and the ejector bottom plate 7 is connected with the ejector panel 6 to increase the contact area of the transmission and improve the movement stability of the ejector panel 6, wherein the ejector bottom plate 7 is movably connected with the auxiliary plate 8, so that after the moving module moves a certain distance, the auxiliary plate 8 releases the connection between the ejector bottom plate 7 and the auxiliary plate 8 under the limiting action of the square iron 5, thereby completing the pre-ejection of the demoulding core 14, and then completing the multi-stage operation of ejecting the product. The technical solution has high continuity in the operation process of ejecting the demoulding core 14 and ejecting the product, which can realize the effective demoulding and automatic falling off of the product, saving injection molding time and cost, and effectively improving the quality of the mold product.

The ejector panel 6 is connected to the ejector pins 11 that penetrate the B plate 3 and the B plate sub-plate 4. The ejector pins 11 are arranged in multiple groups, and the ejector pins 11 penetrate the moving channel 51 formed between the square irons 5, the B plate sub-plate 4 and the B plate 3, and can move in the space formed between the square irons 5, inside the B plate sub-plate 4 and inside the B plate 3; the ejector panel 6 is provided with the ejector pins 11, and after the ejection of the demoulding core 14 is completed, the ejector pins are used to eject the product 15 in the B plate 3 in the state where the stroke of the B plate 3 is limited. This product ejection process is simple, and the product can be effectively ejected from the mold and automatically fall off, saving injection time and cost, and effectively improving the quality of mold products.

The ejector bottom plate 7 is connected to a nylon buckle 16, and one end of the nylon buckle 16 is connected to the auxiliary plate 8. The ejector bottom plate 7 and the auxiliary plate 8 are connected by the nylon buckle 16, so that the auxiliary plate 8 can move with the ejector panel 6. When the auxiliary plate 8 is in conflict with the square iron 5 for limiting, the nylon buckle 16 is provided to release the connection between the ejector bottom plate 7 and the auxiliary plate 8, so that the auxiliary plate can continue to move the moving module in the limited state. Since the auxiliary plate 8 is fixedly connected to the B plate 3, the B plate 3 is in a stationary state. When the moving module continues to move, the product 15 in the stationary B plate 3 is ejected, thereby completing the pre-ejection of the demoulding core 14, and then completing the multi-stage operation of ejecting the product. The technical solution has high continuity in the operation process of ejecting the demoulding core 14 and ejecting the product, which can realize the effective demoulding and automatic falling of the product, saving injection molding time and cost, and effectively improving the quality of mold products.

The square iron 5 is provided with a conflict groove 52 for limiting the travel of the auxiliary plate 8; the square iron 5 is arranged in groups, and a moving channel 51 for providing movement of the mobile module is arranged between the square irons 5. The two ends of the auxiliary plate 8 are arranged corresponding to the conflict groove 52. The conflict groove 52 corresponds to the two ends of the auxiliary plate 8. When the auxiliary plate 8 moves a certain distance, one end of the conflict groove 52 conflicts with the auxiliary plate 8 to limit the auxiliary plate 8, thereby limiting the auxiliary plate 8 from continuing to move. When the ejector rod 17 continues to move, the nylon buckle 16 connecting the ejector base plate 7 and the auxiliary plate 8 is disengaged, thereby releasing the connection between the ejector base plate 7 and the auxiliary plate 8, so that the auxiliary plate 8 can continue to move the mobile module in the limited state. At the same time, the moving channel 51 between the square irons 5 prevents the square iron from interfering with the moving path of the mobile module. The projection of the auxiliary plate 8 in the ejection direction intersects with the conflict groove 52.

The length of the ejector panel 6 and the ejector bottom plate 7 in the direction perpendicular to the ejection direction is smaller than the length of the auxiliary plate 8. The different widths make the ejector panel 6 and the ejector bottom plate 7 not limited by the square iron, and only the auxiliary plate is limited by the square iron, so that the auxiliary plate can eject the product 15 from the driven module in the limited state; the length of the ejector panel 6 and the ejector bottom plate 7 is sufficient to move in the moving channel formed between the square irons 5, and the length of the auxiliary plate 8 is sufficient to limit the stroke of the abutment groove 52.

The auxiliary plate 8 is fixedly connected to the auxiliary plate locking bolt 10, one end of which is connected to the B plate locking bolt 13, and the B plate locking bolt 13 is connected to the B plate 3. The auxiliary plate locking bolt 10 passes through the ejector panel 6 and the ejector bottom plate 7, and when the auxiliary plate 8 is in the limited state, the ejector panel 6 and the ejector bottom plate 7 can move relative to the auxiliary plate locking bolt 10; when the auxiliary plate 8 is connected to the mobile module through the nylon buckle 16, the auxiliary plate locking bolt 10 moves synchronously with the mobile module;

The auxiliary plate locking bolt 10 penetrates the B plate sub-plate 4, and the auxiliary plate locking bolt 10 can move inside the B plate sub-plate 4, and drive the B plate 3 to move through the B plate locking bolt 13. The auxiliary plate 8 is connected to the B plate 3 through the auxiliary plate locking bolt 10 and the B plate locking bolt 13, and drives the B plate 3 to move when the auxiliary plate 8 moves; when the auxiliary plate 8 is limited in stroke, the B plate 3 is in a stationary state, and the moving module continues to move, and the ejector 11 continues to move to eject the product 15.

The B-plate sub-plate 4 is connected to a spring 18, one end of which is in conflict with the moving module. The spring 18 is sleeved on the outer surface of the auxiliary plate locking bolt 10; one end of the spring 18 is in conflict with the surface of one side of the ejector panel 6. The provision of the spring 18 is conducive to the auxiliary plate 8 and the moving module returning to the initial position under the action of the thrust of the ejector rod 17, so as to prepare for the next injection molding demoulding process.

The rear mold ejection mechanism also includes a lower fixed plate 9, i.e., a movable mold plate, which is arranged on one side of the auxiliary plate 8. The ejector rod 17 passes through the lower fixed plate 9, wherein one side of the lower fixed plate 9 contacts one side of the square iron 5. The lower fixed plate 9 is provided to facilitate the stability of the overall structure, and the ejector rod 17 passes through the lower fixed plate, so that the lower fixed plate 9 limits the moving direction of the ejector rod 17 to prevent the ejector rod 17 from shaking.

The rear mold ejection mechanism also includes an A plate 2 arranged on one side of the B plate 3, and an upper fixed plate 1, i.e., a fixed mold plate, is arranged on one side of the A plate 2. The product is arranged on the driven mold assembly, specifically in the B plate 3.

In the injection molds of automobile interior and exterior assembly plastic parts or other plastic parts, there are products with many structural features. Such products cannot meet the surface quality requirements through ordinary left and right conventional mold opening. It is necessary to design a mechanism to demold the internal core of the product before ejecting the product. In this way, the plastic parts can be opened and ejected without sticking to the mold core and not falling off automatically, which will cause the risk of product distortion and mold parts breaking. Especially when the mold is opened with the core structure inserted into the interior of the product, the product cannot fall off automatically under the action of the ejector after the mold is opened. Due to the high surface temperature of the product when the mold is opened, if the manual removal direction is tilted, the product quality may be unqualified, and a lot of time will be wasted, and the cost will increase. Here, a mechanism is designed to demold the core first and then eject it, which can make the product effectively demolded and automatically fall off, which can effectively improve the quality of mold products and reduce costs. A mechanism is designed to demold the core first and then eject it, which can make the product effectively demolded and automatically fall off, saving injection time and cost, and effectively improving the quality of mold products.

In this technical solution, when the front and rear molds of the mold are opened, the demolding core first withdraws from the plastic product, and then the ejector ejects the plastic product, so that the plastic product automatically falls off under its own gravity, effectively improving the injection molding efficiency and reducing labor costs.

The mold closing state is shown in Figure 1. The auxiliary plate 8 and the B plate 3 are locked together by the auxiliary plate locking bolts 10 and the B plate locking bolts 13, that is, the auxiliary plate 8 and the B plate 3 are fixedly connected, the ejector panel 6 and the ejector bottom plate 7 are fixedly connected together by the ejector plate locking bolts 12, and the ejector bottom plate 7 and the auxiliary plate 8 are interference fit by the nylon buckle 16, which can be separated with a little force when moving.

When the injection molding is completed, the mold is opened. At this time, the A plate 2 and the B plate 3 are separated, and then the ejector rod 17 is ejected under the action of the injection molding machine. The ejector panel 6, the ejector bottom plate 7 and the auxiliary plate 8 are lifted by the ejector rod 17 and move to the right of the cross-sectional view of Figure 1. The B plate sub-plate 4 and the square iron 5 and the lower fixed plate 9 are locked together on the machine and do not move. In addition, the B plate 3 is ejected under the auxiliary plate locking bolt 10 and moves to the right together with the ejector panel 6, and the demoulding core 14 is locked on the B plate sub-plate 4. All relative to the product 15, the product 15 is now As the B plate 3 moves to the right, the demoulding core 14 does not move, and the product 15 leaves the demoulding core 14 until the auxiliary plate 8 in the top view contacts the square iron 5 for limiting. At this time, the auxiliary plate 8 is restricted and the B plate 3 is also pulled by the auxiliary plate locking bolts 10 and the B plate locking bolts 13. However, the ejector rod 17 continues to be ejected, and the nylon buckle 16 between the ejector bottom plate 7 and the auxiliary plate 8 is detached. At this time, the auxiliary plate 8 does not move, and the ejector panel 6 and the ejector bottom plate 7 continue to move to the right to eject the product 15 again, completing the injection molding.

The above molds are also equipped with trigger rods and micro switches, which are mainly used to determine the opening and closing stroke of the mold; the side lock mainly functions for precise positioning; the above two combinations can ensure good surface quality of the injection molded products.

This technical solution has the following technical effects:

1) Through this mechanism of demolding the core first and then ejecting, the injection molding time and cost can be saved, the product can be ejected from the ejector pin, and the quality of the mold product can be effectively improved.

2) This mechanism of demolding the core first and then ejecting can avoid the problem that the product cannot be ejected at one time due to complex internal features, especially the products that require extremely high precision on the mating surface, so that the product function can be fully considered in the product design stage and all the required features can be laid out.

3) Through this demolding core first and then ejection mechanism and its setting method, when opening the mold, the inserts at the product feature are first withdrawn and then ejected, so that the product can be ejected safely and the product quality can be effectively improved.

This technical solution can solve the problem that plastic products cannot automatically fall off after being ejected once, and is suitable for applications where the relevant internal features have extremely high precision requirements.

The number and position of the demoulding cores 14 in the mold can be arranged according to the shape of the product.

The technical solution can be applied to the above-mentioned automobile interior and exterior decoration assembly plastic parts or other plastic parts injection molds which are difficult to eject in one go.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

The above is a detailed description of an embodiment of a rear mold ejection mechanism provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims (9)

1. A rear mold ejection mechanism, characterized in that it comprises a driven mold group, a fixed mold group for fixing a demoulding core (14) and limiting the stroke of the driven mold group, and a movable mold group for driving the driven mold group to move so that the demoulding core (14) is separated from the driven mold group and the driven mold group is demoulded in a limited state; The movable die set comprises an ejector rod (17) and a moving module connected to the ejector rod (17); the driven die set comprises an auxiliary plate (8) connected to one end of the moving module and a B plate (3) connected to the auxiliary plate (8) and moving synchronously with the auxiliary plate (8); the fixed die set comprises a square iron (5) arranged corresponding to one side of the auxiliary plate (8) and a B plate sub-plate (4) arranged on one side of the square iron (5) and fixing the demoulding core (14); the B plate (3), the B plate sub-plate (4), the square iron (5), the moving module and the auxiliary plate (8) are arranged in sequence in the opposite direction of the ejection process. 2. The rear mold ejection mechanism according to claim 1 is characterized in that the movable module comprises an ejector panel (6), an ejector base plate (7) fixedly connected to the ejector panel (6), the ejector base plate (7) is fixedly connected to the ejector rod (17), and the ejector base plate (7) is movably connected to the auxiliary plate (8). 3. The rear mold ejection mechanism according to claim 2 is characterized in that the ejector panel (6) is connected to the ejector (11) that passes through the B plate (3) and the B plate sub-plate (4). 4. The rear mold ejection mechanism according to claim 2 is characterized in that the ejector base plate (7) is connected to a nylon buckle (16), and one end of the nylon buckle (16) is connected to an auxiliary plate (8). 5. The rear mold ejection mechanism according to claim 1 is characterized in that the square iron (5) is provided with a resistance groove (52) for limiting the stroke of the auxiliary plate (8); the square irons (5) are arranged in groups, and a moving channel (51) is provided between the square irons (5) to provide a moving module for movement. 6. The rear mold ejection mechanism according to claim 2 is characterized in that the length of the ejector panel (6) and the ejector bottom plate (7) in a direction perpendicular to the ejection direction is smaller than the length of the auxiliary plate (8). 7. The rear mold ejection mechanism according to claim 1 is characterized in that the auxiliary plate (8) is fixedly connected to the auxiliary plate locking bolt (10), one end of the auxiliary plate locking bolt (10) is connected to the B plate locking bolt (13), and the B plate locking bolt (13) is connected to the B plate (3). 8. The rear mold ejection mechanism according to claim 7, characterized in that the B-plate sub-plate (4) is connected to a spring (18), and one end of the spring (18) is in conflict with the moving module. 9. The rear mold ejection mechanism according to claim 1, characterized in that the rear mold ejection mechanism further comprises a lower fixing plate (9), and the lower fixing plate (9) is arranged on one side of the auxiliary plate (8).