Double-layer sliding block mold for plastic spring

Abstract

A double-layer sliding block mold for a plastic spring comprises an upper mold assembly and a lower mold assembly, the upper mold assembly comprises an upper mold ejector plate and an upper mold plate, the lower mold assembly comprises a lower mold plate and a lower mold bearing plate, the upper mold ejector plate is provided with an upper mold insert which movably penetrates out of the upper mold plate downwards, and the lower end of the upper mold insert is matched with the inner wall of the plastic spring; driving rods fixed to the upper die plate are arranged on the two sides of the upper die insert correspondingly, each driving rod comprises a first inclined guide column, a connecting column and a second inclined guide column which are sequentially arranged, the connecting columns are vertically arranged, the inclined guide columns are arranged in parallel, and the distance between the connecting columns and the axis of the upper die insert is gradually increased from top to bottom, and the lower die bearing plate is provided with a lower die punch capable of movably penetrating out of the lower die plate upwards. The upper end of the lower die punch is matched with the inner wall of the plastic spring, sliding block assemblies corresponding to the driving rods are arranged on the two sides of the axis of the lower die punch and comprise upper sliding blocks and lower sliding blocks, the lower sliding blocks are arranged on the upper side face of the lower die plate in a sliding mode, and the upper sliding blocks are in sliding fit with the lower die plate and located above the lower sliding blocks. The upper sliding block and the lower sliding block are respectively provided with upper and lower sliding holes matched with the driving rod; and a forming cavity is formed among the slide block assembly, the upper die insert and the lower die punch after die assembly.

Description

Technical Field

[0001] The utility model specifically relates to a double-layer slider die for plastic springs. Background Art

[0002] Most of the existing cosmetic plastic packaging bottles are installed with metal springs. Through the elasticity of the metal springs, the elastic components have pressing elasticity, so as to achieve the purpose of taking cosmetics. However, according to the regulations in the waste plastic recycling technical specifications, when there are metal products installed in plastic bottles, they do not belong to the category of recyclable plastics. The common methods for recycling and reusing existing waste plastics are mainly waste plastic melting and reprocessing methods. Before melting and processing plastics, waste plastics need to be crushed and screened to distinguish plastics of different materials, and then melted and processed. When there is metal in the plastic, the metal spring needs to be removed first and then recycled. Moreover, the use of metal springs in plastic packaging will cause the phenomenon of spring rusting and contaminating cosmetics, and will also increase the recycling difficulty. Therefore, plastic springs are widely used and replace the application of metal springs in cosmetic packaging bottles.

[0003] However, most of the existing plastic springs are bellows-shaped, and their inner diameters vary in size, as shown in the attachment. Figure 1 And there are mainly two ways for the existing production injection molding equipment to separate the mold after the mold closing and injection molding are completed. The first one is to open the slider first and then core-pull; the disadvantage is that it cannot guarantee that the product stays in the upper mold or the lower mold after mold separation, that is, there is uncertainty, and it has been gradually eliminated. The second one is to core-pull first, and then open the slider after core-pulling. The problem is that it is easy to cause the product to be damaged due to core-pulling, resulting in a low qualified rate. To solve the above problems, a double-layer slider die for plastic springs is specifically proposed. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a double-layer slider die for plastic springs with a simple structure, reliable mold separation, and capable of effectively guaranteeing the qualified rate of products.

[0005] To solve the above technical problems, the utility model is solved by the following technical solutions: A double-layer slider mold for a plastic spring, comprising an upper mold assembly and a lower mold assembly. The upper mold assembly includes an upper mold ejector plate and an upper template. The lower mold assembly includes a lower template and a lower mold carrier plate. The upper mold top plate is provided with an upper mold insert that moves downward through the upper template. The lower end of the upper mold insert matches the inner wall of the plastic spring. On both sides of the upper mold insert, there are driving rods fixed to the upper template. The driving rods include a first inclined guide post, a connecting post, and a second inclined guide post arranged in sequence. The connecting post is vertically arranged. The first inclined guide post and the second inclined guide post are parallel to each other. The distances from the first inclined guide post and the second inclined guide post to the axis of the upper mold insert gradually increase from top to bottom. The lower mold carrier plate is provided with a lower mold punch that can move upward through the lower template. The upper end of the lower mold punch matches the inner wall of the plastic spring. On both sides of the axis of the lower mold punch, there are slider assemblies corresponding to the driving rods. The slider assembly includes an upper slider and a lower slider. The lower slider is slidably arranged on the upper side of the lower template. The upper slider is slidably matched with the lower template and is located above the lower slider. The upper slider and the lower slider are respectively provided with upper sliding holes and lower sliding holes that cooperate with the driving rods. After the mold is closed, a molding cavity is formed between the slider assembly, the upper mold insert, and the lower mold punch.

[0006] Preferably, one side wall of the upper sliding hole close to the upper mold insert is vertically arranged, and the other side wall is parallel to the first inclined guide post. One side wall of the lower sliding hole close to the lower mold punch is vertically arranged, and the other side is parallel to the second inclined guide post. The advantage is that through the vertically arranged side wall of the upper sliding hole and the vertically arranged side wall of the lower sliding hole, it can ensure that the driving rod can drive the slider assembly in three sections during the rising process, that is, during the mold opening process, when moving upward, it first drives the upper slider to move. Then, when the upper slider does not move and the driving rod continues to move upward, the driving rod drives the lower slider to move horizontally and separate. Finally, the mold opening is realized.

[0007] Preferably, the upper mold insert and the lower mold punch are coaxially and vertically arranged, and the upper mold insert is provided with a positioning groove, and the lower mold punch is provided with a positioning protrusion corresponding to the positioning groove. The advantage is that through the coaxially arranged upper mold insert and lower mold punch, it can ensure the coaxiality of the upper part and the lower part during the injection molding process of the plastic spring. And through the cooperation of the positioning groove and the positioning protrusion, the alignment degree can be further ensured.

[0008] Preferably, the lower template is provided with a push plate. The push plate is provided with a movable hole. The lower mold punch movably passes through the movable hole. The inner diameter of the movable hole is larger than the diameter of the lower mold punch and smaller than the diameter of the plastic spring. The advantage is that through the provided push plate, it can ensure the smooth demolding of the plastic spring when the lower mold punch moves downward, that is, it can smoothly come off the lower mold punch.

[0009] Preferably, first slide bars are arranged on both sides of the lower slider, and first sliding grooves corresponding to the first slide bars are formed in the lower template; the advantage is that the transverse sliding stability of the lower slider can be ensured through the cooperation of the first slide bars and the first sliding grooves.

[0010] Furthermore, fixing plates are arranged on both sides of the lower slider, second slide bars are arranged on both sides of the upper slider, and second sliding grooves corresponding to the second slide bars are formed in the fixing plates; the advantage is that the transverse sliding stability of the upper slide plate can be ensured through the cooperation of the second slide bars and the second sliding grooves, and at the same time, the upper slider is slidably arranged between the two fixing plates of the lower slider, which can effectively ensure the stability and consistency after closing.

[0011] Preferably, a fixing part fixed to the upper template is arranged at the upper end of the first inclined guide post, and the first inclined guide post, the connecting column and the second inclined guide post are integrally formed; the advantage is that the stability and resistance of the driving rod can be effectively ensured through the integrally formed first inclined guide post, connecting column and second inclined guide post.

[0012] Preferably, the length of the connecting column is greater than the thickness of the upper slider; the advantage is that it can ensure that when the mold is separated, the second inclined guide post drives the lower slider to move after the upper mold insert moves a certain distance, ensuring the reliability of the mold separation of the upper mold insert and reducing interference.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the first inclined guide post, the connecting column and the second inclined guide post arranged on the driving rod can realize a three-stage driving slider assembly when the mold is separated, that is, when the upper template moves upward, the first inclined guide post first drives the upper slider to move, and then the connecting column continues to move upward in the upper sliding hole. At this time, the upper slider does not move, and the second inclined guide post drives the lower slider to move horizontally and separate. Finally, the second inclined guide post enters the upper slider and drives the upper slider to move horizontally to realize the complete separation of the driving rod and the slider assembly. During the mold separation process, the upper slider is separated first to facilitate the core pulling of the upper mold insert, and then the lower sliders are separated from each other to facilitate the core pulling of the lower mold punch, realizing the gradual mold separation of the plastic spring and facilitating the blanking of the plastic spring after injection molding. The design has a simple structure, can reliably separate the plastic spring, and improves the qualified rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2One of the schematic diagrams of the open-mold state of the present utility model;

[0017] Figure 3 Two of the schematic diagrams of the open-mold state of the present utility model;

[0018] Figure 4 Three of the schematic diagrams of the open-mold state of the present utility model;

[0019] Figure 5 Schematic diagram of the cooperation between the upper slider and the lower slider of the present utility model;

[0020] Figure 6 Schematic diagram of the structure of the plastic spring of the present utility model. Detailed implementation mode

[0021] The following combines the attached Figures 1-6 Further describe the present utility model in detail.

[0022] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description of the present utility model can be used in other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not deviate from the spirit and scope of the present utility model.

[0023] Those skilled in the art should understand that in the disclosure of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model in a simplified manner, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0024] As attached Figures 1-5A double-layer slider die for a plastic spring as shown, comprising an upper die assembly and a lower die assembly. The upper die assembly includes an upper die ejector plate 1 and an upper template 3. The lower die assembly includes a lower template 5 and a lower die carrier plate 6. An upper die insert 2 is provided on the upper die top plate and extends downward through the upper template 3. The lower end of the upper die insert 2 is matched with the inner wall of the plastic spring 10. On both sides of the upper die insert 2, there are driving rods 4 fixed to the upper template 3. The driving rod 4 includes a first inclined guide post 4.1, a connecting post 4.2, and a second inclined guide post 4.3 arranged in sequence. The connecting post 4.2 is vertically arranged. The first inclined guide post 4.1 and the second inclined guide post 4.3 are parallelly arranged. The distances from the first inclined guide post 4.1 and the second inclined guide post 4.3 to the axis of the upper die insert 2 gradually increase from top to bottom. The lower die carrier plate 6 is provided with a lower die punch 7 that can move upward through the lower template 5. The upper end of the lower die punch 7 is matched with the inner wall of the plastic spring 10. On both sides of the axis of the lower die punch 7, there are slider assemblies corresponding to the driving rods 4. The slider assembly 9 includes an upper slider 9.1 and a lower slider 9.2. The lower slider 9.2 is slidably arranged on the upper side of the lower template 5. The upper slider 9.1 is slidably engaged with the lower template 5 and is located above the lower slider 9.2. The upper slider 9.1 and the lower slider 9.2 are respectively provided with upper sliding holes 9.11 and lower sliding holes 9.21 that are engaged with the driving rods 4. After the die is closed, a forming cavity is formed between the slider assembly 9, the upper die insert 2, and the lower die punch 7. Among them, the length of the connecting post 4.2 is greater than the thickness of the upper slider 9.1.

[0025] When the die is closed, the upper template 3 and the lower template 5 are tightly attached to each other. The upper die ejector plate 1 presses above the upper template 3. The lower die carrier plate 6 is used to carry the lower template 5. At this time, the upper die insert 2 passes through the upper template 3, and the lower die punch 7 passes through the lower template 5, and the upper die insert 2 is aligned with the lower die punch 7. At the same time, the driving rod 4 drives the upper sliders 9.1 to close together and the lower sliders 9.2 to close together, and forms a forming cavity with the upper die insert 2 and the lower die punch 7. The plastic spring 10 is formed by injecting materials into the forming cavity through injection molding.

[0026] During mold separation, the top plate of the upper mold moves upward with the upper mold plate 3. At this time, the driving rod 4 of the upper mold plate 3 drives the slider assembly 9 to separate the mold, that is, the three-stage driving slider assembly 9 is realized through the first inclined guide column 4.1, the connecting column 4.2 and the second inclined guide column 4.3 set by the driving rod 4. Specifically, during the upward movement of the upper mold plate 3, the first inclined guide column 4.1 first drives the upper slider 9.1 to move. Since the connecting column 4.2 is vertically set, when the connecting column 4.2 is located in the upper slide hole 9.11 and continues to move upward, the upper slider 9.1 does not move, so that the upper mold core is pulled out of place, avoiding the interference of the plastic spring 10 pressed by the upper mold slider when the upper mold insert 2 is pulled out. Then the upper mold plate 3 continues to move upward, and at this time the second inclined guide column 4.3 drives the lower slider 9.2 to move horizontally and separate, so that the lower mold core is pulled out of place, avoiding the interference of the plastic spring 10 pressed by the lower slider 9.2 when the lower mold punch 7 is pulled out. Finally, the second inclined guide column 4.3 enters the upper slide hole 9.11 to drive the upper slide block 9.1 to move horizontally to achieve complete separation of the driving rod 4 and the slide block assembly 9. In the mold separation process, the upper slide block 9.1 is first separated to facilitate the core pulling of the upper mold insert 2, and then the lower slide blocks 9.2 are separated from each other to facilitate the core pulling of the lower mold punch 7, thereby realizing the gradual mold separation of the plastic spring 10 and facilitating the unloading of the plastic spring 10 after injection molding.

[0027] On the basis of the above, the upper sliding hole 9.11 is vertically arranged on one side wall close to the upper mold insert 2, and the other side wall is parallel to the first inclined guide column 4.1; the lower sliding hole 9.21 is vertically arranged on one side wall close to the lower mold punch 7, and the other side wall is parallel to the second inclined guide column 4.3; the vertically arranged side wall of the upper sliding hole 9.11 and the vertically arranged side wall of the lower sliding hole 9.21 can ensure the reliability of the three-stage driving slider assembly 9 to gradually separate the mold during the rising process of the driving rod 4.

[0028] It is worth mentioning that in the present design, the upper die insert 2 and the lower die punch 7 are coaxially and vertically arranged, and the upper die insert 2 is provided with a positioning groove 2.1, and the lower die punch 7 is provided with a positioning protrusion 7.1 corresponding to the positioning groove 2.1. The coaxially arranged upper die insert 2 and lower die punch 7 ensure the coaxiality of the upper part and the lower part during the injection molding process of the plastic spring 10; and the alignment can be further ensured by the cooperation of the arranged positioning groove 2.1 and the positioning protrusion 7.1.

[0029] In order to further ensure the reliability of demoulding, a push plate 8 is provided on the lower mold plate 5. The push plate 8 is provided with a movable hole. The lower die punch 7 movably passes through the movable hole. The inner diameter of the movable hole is larger than the diameter of the lower die punch 7 and smaller than the diameter of the plastic spring 10. The interference of the push plate 8 is used to drive the plastic spring 10 to be smoothly removed from the lower die punch 7.

[0030] To ensure the lateral movement stability of the slider assembly 9, first slide bars 9.22 are provided on both sides of the lower slider 9.2, and the lower template 5 is provided with first sliding grooves corresponding to the first slide bars 9.22. Further, fixing plates 9.23 are provided on both sides of the lower slider 9.2, second slide bars 9.12 are provided on both sides of the upper slider 9.1, and the fixing plates 9.23 are provided with second sliding grooves corresponding to the second slide bars 9.12. The cooperation between the second slide bars 9.12 and the second sliding grooves can ensure the lateral sliding stability of the upper slide plate. At the same time, sliding the upper slider 9.1 between the two fixing plates 9.23 of the lower slider 9.2 can effectively ensure the stability and consistency after closing.

[0031] At the upper end of the first inclined guide post 4.1 of the present utility model, a fixing portion 4.4 fixed to the upper template 3 is provided. The first inclined guide post 4.1, the connecting post 4.2 and the second inclined guide post 4.3 are integrally formed. The integrally formed first inclined guide post 4.1, connecting post 4.2 and second inclined guide post 4.3 can effectively ensure the stability and resistance of the driving rod 4.

[0032] The plastic spring described in this design is as shown in the Figure 6 accompanying drawings.

[0033] Those skilled in the art should understand that the embodiments of the present utility model described above and shown in the accompanying drawings are only examples and do not limit the present utility model. The object of the present utility model has been completely and effectively achieved. The functions and structural principles of the present utility model have been shown and described in the embodiments. Without departing from the above principles, the embodiments of the present utility model can have any deformation or modification.

Claims

1. A double-layer slider mold for a plastic spring, comprising an upper mold assembly and a lower mold assembly, wherein the upper mold assembly comprises an upper mold ejector plate and an upper mold plate, and the lower mold assembly comprises a lower mold plate and a lower mold support plate, characterized in that: The upper die ejector plate is provided with an upper die insert that moves downward and passes through the upper die plate, the lower end of the upper die insert matches the inner wall of the plastic spring, and driving rods fixed to the upper die plate are provided on both sides of the upper die insert, and the driving rod includes a first oblique guide column, a connecting column and a second oblique guide column that are arranged in sequence, the connecting column is arranged vertically, the first oblique guide column and the second oblique guide column are arranged in parallel, and the distance between the first oblique guide column and the second oblique guide column from the upper die insert axis gradually increases from top to bottom, and the lower die support plate is provided with a lower die punch that can move upward and pass through the lower die plate, the upper end of the lower die punch matches the inner wall of the plastic spring, and slider assemblies corresponding to the driving rod are provided on both sides of the axis of the lower die punch, and the slider assembly includes an upper slider and a lower slider, and the lower slider is slidably arranged on the upper side of the lower die plate, the upper slider is slidably matched with the lower die plate and is located above the lower slider, and the upper slider and the lower slider are respectively provided with an upper sliding hole and a lower sliding hole that match the driving rod; after the mold is closed, a molding cavity is formed between the slider assembly and the upper die insert and the lower die punch.

2. A double-layer slider mold for a plastic spring according to claim 1, characterized in that: The upper sliding hole is vertically arranged near one side wall of the upper die insert, and the other side wall is parallel to the first inclined guide column. The lower sliding hole is vertically arranged near one side wall of the lower die punch, and the other side wall is parallel to the second inclined guide column.

3. The double-layer slider mold for a plastic spring according to claim 1, characterized in that: The upper die insert is coaxially and vertically arranged with the lower die punch, and the upper die insert is provided with a positioning groove, and the lower die punch is provided with a positioning protrusion corresponding to the positioning groove.

4. The double-layer slider mold for a plastic spring according to claim 1, characterized in that: The lower mold plate is provided with a push plate, and the push plate is provided with a movable hole. The lower die punch movably passes through the movable hole, and the inner diameter of the movable hole is larger than the diameter of the lower die punch and smaller than the diameter of the plastic spring.

5. The double-layer slider mold for a plastic spring according to claim 1, characterized in that: First slide bars are arranged on both sides of the lower sliding block, and the lower template is provided with first slide grooves corresponding to the first slide bars.

6. The double-layer slider mold for a plastic spring according to claim 5, characterized in that: Fixed plates are arranged on both sides of the lower slider, second slide bars are arranged on both sides of the upper slider, and second slide grooves corresponding to the second slide bars are formed on the fixed plates.

7. The double-layer slider mold for a plastic spring according to claim 1, characterized in that: A fixing portion fixed to the upper template is disposed at the upper end of the first oblique guide column, and the first oblique guide column, the connecting column and the second oblique guide column are integrally formed.

8. The double-layer slider mold for a plastic spring according to claim 1, characterized in that: The length of the connecting column is greater than the thickness of the upper sliding block.

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