Polycarbonate fan hub injection mold with locally side-concave wheel surface

Abstract

The utility model discloses a polycarbonate fan hub injection mold with a local side concave wheel surface, which relates to the technical field of molds and comprises a fixed mold fixing plate, a fixed mold plate, a movable mold plate and a movable mold fixing plate, a fixed mold insert is arranged in the middle of the fixed mold plate, wedge blocks are arranged on two sides of the fixed mold plate, the movable mold plate is connected with the movable mold fixing plate through a cushion block, and the movable mold plate is connected with the movable mold fixing plate through the cushion block. A movable mold core is arranged in the middle of the movable mold plate, a flat ejector rod and a runner ejector rod are arranged on the movable mold core in a penetrating mode, an ejector retainer plate and an ejector base plate are arranged below the flat ejector rod and the runner ejector rod, and a left side pulling part and a right side pulling part are arranged on the two sides of the movable mold plate respectively. Side pulling in two directions is completed by using a set of inclined guide pillar structure, so that the production efficiency is improved, and the product quality is ensured; the flexibility and the functionality of the mold are improved; the temperature of the mold can be effectively controlled; the heat of the mold can be managed more effectively by using the heat pipe, and deformation and abrasion of the mold are reduced; and the positioning concave block and the positioning convex block are matched for use, so that accurate positioning is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a polycarbonate fan hub injection mold with a partially undercut wheel surface. Background Art

[0002] As shown in the figure, the flow channel of the plastic product is drawn, and the product is arranged in the mold as follows. The product is a polycarbonate fan hub with partial undercuts, and some dimensions are shown in the figure. There are three evenly distributed undercuts on the cylindrical concave surface. The requirements for this mold are that the production cycle is within 55 seconds and the product precision is good. To meet this requirement, a two-plate mold is used, and the product is one piece per mold. The cylindrical concave surface needs to be formed using an inclined guide column slider structure, and one of the undercuts is on a slider. The remaining two undercuts in different directions are also set on another slider, and an inclined guide block is set. The inclined guide column slider structure also has side draws in different directions. In the process of the inclined guide column side draw slider, the demolding actions in different directions are completed at the same time. In the process of mold closing, the molds are closed in sequence without interference. Therefore, a special mold is designed based on the above characteristics. Utility Model Content

[0003] The utility model aims to provide a polycarbonate fan hub injection mold with a partially undercut wheel surface, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polycarbonate fan hub injection mold with a partially undercut wheel surface, comprising a fixed mold fixing plate, a fixed mold plate, a movable mold plate and a movable mold fixing plate, a fixed mold insert is provided in the middle of the fixed mold plate, wedge blocks are provided on both sides of the fixed mold plate, the movable mold plate and the movable mold fixing plate are interconnected by a pad, a movable mold core is provided in the middle of the movable mold plate, a flat ejector rod and a flow channel ejector rod are passed through the movable mold core, and a face needle plate and a bottom needle plate are provided below the flat ejector rod and the flow channel ejector rod, a left side drawer and a right side drawer are respectively provided on both sides of the movable mold plate, the left side drawer includes a left slider body and a left slider seat, and the right side drawer includes a right slider body, a right slider seat and a first drawer structure.

[0005] Further: oblique guide column holes are provided on the top of the left slider seat and the right slider seat, and the oblique guide columns can be inserted into the oblique guide column holes. Slider guide rails are provided on the sides of the two slider seats. The left slider body and the left slider seat are fixedly connected to each other, and a side pull-out core is provided in the middle of the head of the left slider body; side pull-out cores are provided on both sides of the head of the right slider seat, and the side pull-out cores here are arranged on the first pull-out structure.

[0006] Further: the first-pull structure includes a chute block and a first-pull guide block, the lower part of the first-pull guide block is fixedly connected to the right slider seat, the side-pull core is arranged at the head of the chute block, and a slider spring and a limit screw are provided in the middle of the right slider seat and the right slider body.

[0007] Preferably: a slider cooling pipe is provided at the rear of the left slider body and the right slider body, a return spring rod is provided at the rear middle of the left slider seat and the right slider seat, and the return spring rod is arranged on the outside of the movable template through a support.

[0008] Preferably: a positioning concave block and a positioning convex block are provided between the fixed template and the movable template, and the positioning concave block and the positioning convex block can cooperate with each other to achieve precise positioning, and a guide column is provided around the top of the movable template, and the guide column can be inserted into the guide sleeve of the fixed template.

[0009] Preferably, the dynamic mold core is arranged in the middle of the dynamic mold plate through a dynamic mold insert, and heat pipes are arranged in both the dynamic mold insert and the fixed mold insert.

[0010] Preferably, an ejection pad is provided below the bottom needle plate, the ejection pad is arranged in a through hole of the movable mold fixing plate, and a return spring rod is provided at a diagonal position of the surface needle plate.

[0011] There are two core technologies: one is the side demoulding of the inclined guide column slider. The other is sequential side extraction: the inclined guide column slider has side extractions in different directions, and the inclined guide blocks are reasonably set and completed using the same inclined guide column side extraction structure.

[0012] Demolding on the side of the inclined guide pin and the slider. A fixed inclined guide pin is set on one side of the mold frame, and a slider is set on the other side. The slider has an inclined hole that cooperates with the inclined guide pin. The mold opening action causes relative movement between the inclined guide pin and the inclined guide pin slider. Since the hole is inclined, when it is relatively far away, the slider will be driven by the inclined guide pin and move in the vertical direction of the opening and closing direction. Generally, it slides to the outside of the mold.

[0013] Sequential side withdrawal: Under the action of the spring, the slider and the slider seat are first separated, and the side withdrawal is first made into place through the inclined guide block fixed on the slider seat, while the slider body does not move. As the side withdrawal continues, under the action of the limit screw, the slider body is driven by the slider and continues to be withdrawn into place, thereby completing the sequential side withdrawal action.

[0014] Compared with the prior art, the utility model has the following beneficial effects: sequential side extraction is achieved through the inclined guide column slider structure, two side extraction parts are designed, and side extraction in two directions is completed using a set of inclined guide column structures. This design can improve production efficiency while ensuring product quality; the left side extraction part can realize two-stage side extraction, which increases the flexibility and functionality of the mold; through the cooling water channel design, the temperature of the mold can be effectively controlled to ensure product quality and the service life of the mold; heat pipes are used in the inserts of the fixed mold and the movable mold for cooling, and this design can more effectively manage the heat of the mold, improve production efficiency, and reduce deformation and wear of the mold; through the coordinated use of positioning concave blocks and positioning convex blocks, precise positioning of the mold is achieved, ensuring the dimensional accuracy and consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 It is a vertical cross-sectional view of the utility model;

[0017] Figure 3 It is a top view of the movable mold part;

[0018] Figure 4 This is a schematic diagram of the product structure;

[0019] Figure 5 This is an enlarged schematic diagram of point A;

[0020] Figure 6 This is an enlarged schematic diagram of point B;

[0021] Figure 7 It is a schematic diagram of the left side drawing part;

[0022] Figure 8 It is a schematic diagram of the right side drawing part;

[0023] Fig. 9 It is a top view of the right side drawer;

[0024] Fig.10 This is an enlarged schematic diagram of point C;

[0025] Fig.11 It is the state diagram of the right side withdrawal;

[0026] Fig.12 This is the right side drawing;

[0027] Fig.13 This is a schematic diagram of the cooling of the fixed mold insert;

[0028] Fig.14 This is the local cooling diagram of the moving mold;

[0029] Fig.15 Schematic diagram of cooling of movable mold insert.

[0030] In the figure: 1, fixed mold fixing plate, 2, fixed mold plate, 3, wedge block, 4, fixed mold insert, 5, inclined guide column, 6, left drawer, 7, right drawer, 8, movable mold plate, 9, movable mold core, 10, cushion block, 11, surface needle plate, 12, bottom needle plate, 13, movable mold fixing plate, 14, flat ejector rod, 15, runner ejector rod, 16, return spring rod, 17, guide column, 18, movable mold insert, 19, heat pipe, 2 0. Ejector pad, 21. Positioning concave block, 22. Positioning convex block, 23. Slider guide rail, 24. Slider cooling tube, 25. Side pull-out core, 26. Reset spring rod, 61. Left slider body, 62. Left slider seat, 71. Right slider body, 72. Right slider seat, 73. Pre-pull structure, 74. Limit cover, 75. Slider spring, 76. Limit screw, 731. Bevel slot block, 732. Pre-pull guide block. DETAILED DESCRIPTION

[0031] The present invention will be described below based on the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. However, it is worth noting that the present invention is not limited to these embodiments. In the detailed description of the present invention below, some specific details are described in detail. However, for the parts that are not described in detail, those skilled in the art can also fully understand the present invention.

[0032] In addition, those skilled in the art should understand that the drawings are only provided to illustrate the purpose, features and advantages of the present invention, and the drawings are not actually drawn according to scale.

[0033] At the same time, unless the context clearly requires otherwise, the words "include", "comprises" and similar words throughout the specification and claims should be interpreted as inclusive rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0034] See also Figure 1-Figure 15 The utility model provides a technical solution: it includes a fixed mold fixing plate 1, a fixed mold plate 2, a movable mold plate 8 and a movable mold fixing plate 13, a fixed mold insert 4 is provided in the middle of the fixed mold plate 2, wedge blocks 3 are provided on both sides of the fixed mold plate 2, the movable mold plate 8 and the movable mold fixing plate 13 are interconnected through a cushion block 10, a movable mold core 9 is provided in the middle of the movable mold plate 8, a flat ejector rod 14 and a flow channel ejector rod 15 are passed through the movable mold core 9, and a surface needle plate 11 and a bottom needle plate 12 are provided below the flat ejector rod 14 and the flow channel ejector rod 15, and a left side drawer 6 and a right side drawer 7 are provided on both sides of the movable mold plate 8, respectively, the left side drawer 6 includes a left slider body 61 and a left slider seat 62, and the right side drawer 7 includes a right slider body 71, a right slider seat 72 and a first drawer structure 73.

[0035] The left slider seat 62 and the right slider seat 72 are each provided with an inclined guide column hole on the top, and the inclined guide column 5 can be inserted into the inclined guide column hole. Slider guide rails 23 are provided on the sides of the two slider seats. The left slider body 61 and the left slider seat 62 are fixedly connected to each other, and a side pull-out core 25 is provided in the middle of the head of the left slider body 61; side pull-out cores 25 are provided on both sides of the head of the right slider seat 72, and the side pull-out cores 25 here are arranged on the first pull-out structure 73.

[0036] The first-pull structure 73 includes an inclined slot block 731 and a first-pull guide block 732. The lower part of the first-pull guide block 732 is fixed to the right slider seat 72. The side-pull core 25 is arranged at the head of the inclined slot block 731. A slider spring 75 and a limit screw 76 are provided between the right slider seat 72 and the right slider body 71.

[0037] A slider cooling pipe 24 is provided at the rear of the left slider body 61 and the right slider body 71 , and a return spring rod 26 is provided at the rear middle of the left slider seat 62 and the right slider seat 72 . The return spring rod 26 is arranged on the outside of the movable template 8 through a support.

[0038] A positioning recess 21 and a positioning protrusion 22 are provided between the fixed template 2 and the movable template 8, and the positioning recess 21 and the positioning protrusion 22 can cooperate with each other to achieve precise positioning. A guide column 17 is provided around the top of the movable template 8, and the guide column 17 can be inserted into the guide sleeve of the fixed template 2.

[0039] The movable mold core 9 is arranged in the middle of the movable mold plate 8 through a movable mold insert 18 , and heat pipes 19 are arranged in both the movable mold insert 18 and the fixed mold insert 4 .

[0040] An ejection pad 20 is disposed below the bottom needle plate 12 , and the ejection pad 20 is disposed in a through hole of the movable mold fixing plate 13 .

[0041] The two ends of the mold are fixed to the fixed plate of the injection molding machine through an I-shaped panel, which belongs to the general technology of technicians in this field. Before the mold is opened, the left and right side withdrawal parts are contacted and wedged by the wedging block 3. When the mold is opened, the movable and fixed molds are separated from the parting surface, and the wedging blocks 3 on both sides move apart together. The inclined guide column 5 drives the left and right slider seats to start moving to realize the first step of mold opening and side withdrawal at the same time. As the mold opening proceeds, when the inclined guide column 5 is completely pulled out of the inclined guide holes of the two slider seats, the side withdrawal is in place. The structural principle of the left and right side inclined guide columns 5 is the same. The structure here is a technical means commonly used by technicians in this field, and the structure is slightly different. However, there are some differences between the left and right side withdrawal parts. Two strong slider springs 75 are arranged between the right slider seat 72 and the right slider body 71. Under the action of the spring force, the right slider seat 72 is withdrawn first, while the right slider body 71 remains stationary. There are also two first withdrawal structures 73 in different directions on the right slider body 71. By utilizing the relative movement between the right slider body 71 and the right slider seat 72, a first withdrawal guide block 732 is fixed on the right slider seat 72, which cooperates with the inclined groove block 731 on the side withdrawal core 25 to produce relative sliding. Due to the angle relationship, the two side withdrawal cores are each withdrawn to the rear side by a certain appropriate distance (controlled by the limit stroke of the limit screw 76) and completely retracted into the molding surface (as shown in the attached figure). Fig.12 As shown), demoulding is completed in one direction, and under the action of mold opening and inclined guide pillars 5, it is pushed to a suitable position that does not affect the ejection of the product from the mold. When the mold is opened to the point where the product and runner can be smoothly taken out from the mold parting surface, the mold opening stops. Next, under the control of the injection molding machine control system, the ejector mechanism on the dynamic mold side of the injection molding machine is activated, and the ejector bar presses against the ejector pad 20, pushing the bottom needle plate 12 and the face needle plate 11, and overcoming the pressing force of the return spring rod 16 to drive the flat ejector rod 14 and the runner ejector rod 15 above to tighten the product on the dynamic mold cavity (as shown in the attached figure). Figure 4 As shown in the figure, the mold is ejected from the cavity, and the runner condensate is ejected at the same time. As the ejection continues and reaches a suitable height, the product is completely out of contact with the movable mold, and then the ejection stops. At this time, we can easily take out the product and the gate condensate from the mold. Then the reverse work is reset to enter the next working cycle.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polycarbonate fan hub injection mold with a partially undercut wheel surface, comprising a fixed mold plate (1), a fixed mold plate (2), a movable mold plate (8) and a movable mold fixed plate (13), characterized in that: A fixed mold insert (4) is provided in the middle of the fixed mold plate (2), wedge blocks (3) are provided on both sides of the fixed mold plate (2), the movable mold plate (8) and the movable mold fixing plate (13) are interconnected through a cushion block (10), a movable mold core (9) is provided in the middle of the movable mold plate (8), a flat ejector rod (14) and a flow channel ejector rod (15) are passed through the movable mold core (9), and a surface needle plate (11) and a bottom needle plate (12) are provided below the flat ejector rod (14) and the flow channel ejector rod (15), and a left side drawer (6) and a right side drawer (7) are provided on both sides of the movable mold plate (8), respectively, the left side drawer (6) includes a left slider body (61) and a left slider seat (62), and the right side drawer (7) includes a right slider body (71), a right slider seat (72) and a first drawer structure (73).

2. The polycarbonate fan hub injection mold with a partially undercut wheel surface according to claim 1, characterized in that: The upper parts of the left slider seat (62) and the right slider seat (72) are both provided with oblique guide post holes, into which the oblique guide posts (5) can be inserted, and the sides of the two slider seats are provided with slider guide rails (23), the left slider body (61) and the left slider seat (62) are fixedly connected to each other, and a side-drawing core (25) is provided in the middle of the head of the left slider body (61); side-drawing cores (25) are provided on both sides of the head of the right slider seat (72), and the side-drawing cores (25) here are arranged on the first-drawing structure (73).

3. The polycarbonate fan hub injection mold with a partially undercut wheel surface according to claim 2, characterized in that: The first-draw structure (73) includes an inclined slot block (731) and a first-draw guide block (732), the lower part of the first-draw guide block (732) is fixedly connected to the right slider seat (72), the side-draw core (25) is arranged at the head of the inclined slot block (731), and a slider spring (75) and a limit screw (76) are arranged between the right slider seat (72) and the right slider body (71).

4. The polycarbonate fan hub injection mold with a partially undercut wheel surface according to claim 2, characterized in that: A slider cooling pipe (24) is provided at the rear of the left slider body (61) and the right slider body (71), and a return spring rod (26) is provided at the rear middle of the left slider seat (62) and the right slider seat (72), and the return spring rod (26) is arranged on the outside of the movable template (8) through a support.

5. The polycarbonate fan hub injection mold with a partially undercut wheel surface according to claim 1, characterized in that: A positioning concave block (21) and a positioning convex block (22) are provided between the fixed die plate (2) and the movable die plate (8), and the positioning concave block (21) and the positioning convex block (22) can cooperate with each other to achieve precise positioning. A guide column (17) is provided around the upper part of the movable die plate (8), and the guide column (17) can be inserted into the guide sleeve of the fixed die plate (2).

6. The polycarbonate fan hub injection mold with a partially undercut wheel surface according to claim 1, characterized in that: The movable mold core (9) is arranged in the middle of the movable mold plate (8) through a movable mold insert (18), and heat pipes (19) are arranged in both the movable mold insert (18) and the fixed mold insert (4).

7. The polycarbonate fan hub injection mold with a partially undercut wheel surface according to claim 1, characterized in that: An ejection pad (20) is provided below the bottom needle plate (12), and the ejection pad (20) is arranged in a through hole of the movable mold fixing plate (13).

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