Thermosetting plastic injection molding type compression molding mold

Abstract

The invention discloses a thermosetting plastic injection molding type compression molding mold. The mold comprises a bottom fixing assembly used for fixing the upper end of the molding mold; the middle baffle assembly is arranged at the upper end of the bottom mold core fixing assembly and used for fixing the side face of the forming mold; the upper end fixing assembly is arranged at the upper end of the middle baffle assembly and used for fixing the upper end of the forming mold. The forming die is located on the bottom fixing assembly and the upper end fixing assembly. A feeding cavity is formed in the upper end fixing assembly, a feeding runner communicated with the feeding cavity is arranged in the upper end fixing assembly, and materials are injected into a cavity of the forming mold through the feeding cavity and the feeding runner. The mold is simple in structure, easy to manufacture and low in cost, product forming can be achieved on an oil press equipment platform, the injection molding type plastic pressing mold with the function of one mold with two pieces is provided, and a solution for simplified mold injection molding production is provided for enterprises without injection molding equipment and injection mold production conditions.

Description

Technical Field

[0001] The invention relates to the technical fields of mold design and non-metal composite material molding, and in particular to a thermosetting plastic injection molding mold. Background Art

[0002] Conventional chopped fiber premixes are generally formed by a compression molding process, which places the prepreg directly into the mold cavity and solidifies it under high temperature and high pressure. It has the advantages of high product dimensional accuracy, good repeatability, and the ability to form products with complex structures. However, this method is mainly suitable for larger products. For extremely small products, this method has low production efficiency and high cost.

[0003] At present, the domestic development of thermoplastics includes injection molding, but the injection molding of thermosetting plastics has relatively high requirements for injection molding machines. There are basically no mature implementation cases and reference solutions for the application of thermosetting plastic injection molding in China. Due to the poor fluidity of thermosetting plastics, the production method basically adopts single-piece compression molding. For the production of small parts and small batches, the production efficiency will be greatly reduced, the production cost will be high, and the labor intensity will be high. Therefore, it is urgent to design an injection-compression mold with simple manufacturing and injection molding function, and use the existing hydraulic press equipment to realize the preparation of micro and complex composite products. Summary of the invention

[0004] In view of this, the present invention proposes a thermosetting plastic injection molding mold in order to enable enterprises without injection molding equipment and injection mold production conditions to produce composite materials products with complex microstructures in small batches at low cost through mold design and manufacturing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A thermosetting plastic injection molding die, comprising:

[0007] A bottom fixing assembly is used to fix the upper end of the forming mold;

[0008] A middle baffle assembly is arranged at the upper end of the bottom core fixing assembly and is used to fix the side of the forming mold;

[0009] An upper end fixing assembly is arranged at the upper end of the middle baffle assembly and is used to fix the upper end of the forming mold;

[0010] A molding die, used for product molding, located between the bottom fixing assembly and the upper fixing assembly, with the side surface in contact with the middle baffle assembly;

[0011] The upper end fixing component is provided with a feeding cavity, and a feeding channel connected with the feeding cavity is provided inside, and the material is injected into the cavity of the forming mold through the feeding cavity and the feeding channel.

[0012] As a further improvement of the above technical solution:

[0013] Preferably, the molding mold includes an arc-shaped convex core located on the middle baffle assembly and whose upper end is limited by an upper end fixing assembly, and an arc-shaped concave core arranged at the upper end of the arc-shaped convex core and limited by an upper end fixing assembly. The arc-shaped convex core and the arc-shaped concave core constitute a cavity, and an inner core is arranged in the cavity. The lower end of the inner core passes through the arc-shaped convex core and the middle baffle assembly in sequence and is fixed on the bottom fixing assembly, and a feeding channel is arranged in the arc-shaped concave core.

[0014] Preferably, the bottom fixing assembly comprises a bottom plate and a core fixing plate connected as a whole by a first screw, and the bottom of the inner core is arranged on the bottom plate and the upper end slides through the core fixing plate.

[0015] Preferably, the middle baffle assembly comprises a core baffle and a core seat connected as a whole by a second screw, the inner core penetrates and slides in the core baffle, and the arc-shaped convex core is arranged on the core baffle and is limited on the left and right sides by the core seat.

[0016] Preferably, a first clamping groove is provided on the core seat, and first clamping blocks are provided on the left and right sides of the lower end of the arc-shaped convex core, and the arc-shaped convex core is fixed by the core seat through the cooperation between the first clamping groove and the first clamping block.

[0017] Preferably, a guide column is provided on the core baffle, second clamping blocks are provided on the left and right sides of the lower end of the guide column, and a second clamping groove is provided on the core seat, and the guide column is fixed to the core seat through the cooperation between the second clamping groove and the second clamping block.

[0018] Preferably, the upper fixing assembly is provided with a guide hole, which matches the guide column, and the guide column cooperates with the guide hole, so that the upper fixing assembly and the middle baffle assembly complete the guidance to ensure the shape and size of the product.

[0019] Preferably, the upper end fixing assembly includes a mold sleeve and a core pressure plate connected into a whole by a third screw, a third slot is arranged on the mold sleeve, and third blocks are arranged on the left and right sides of the upper end of the arc-shaped concave core, and the arc-shaped concave core is fixed by the mold sleeve through the cooperation between the third slot and the third block, and the height of the lower surface of the mold sleeve is lower than the height of the upper surface of the arc-shaped convex core, so that the mold sleeve limits the left and right sides of the arc-shaped convex core, thereby ensuring the alignment between the arc-shaped convex core and the arc-shaped concave core.

[0020] Preferably, it also includes a demoulding frame, which includes a demoulding plate and a demoulding rod arranged at the upper end of the demoulding plate. The demoulding frame is used to demould the product from the molding mold after molding is completed.

[0021] Preferably, it also includes a demolding frame, and the bottom fixing component, the middle baffle component and the upper fixing component are provided with a first demolding groove and a second demolding groove which are staggered up and down, the first demolding groove runs through the bottom fixing component and the middle baffle component, the second demolding groove runs through the upper fixing component and the middle baffle component, the demolding frame includes a demolding plate and a plurality of demolding rods arranged on the demolding plate, the plurality of demolding rods match the distribution of the plurality of first demolding grooves or the plurality of second demolding grooves, and the length of the demolding rod is greater than the length of the first demolding groove and the second demolding groove.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The mold structure of the present invention is simple, easy to manufacture and low in cost. It can realize product molding on the hydraulic press equipment platform. The injection-type plastic compression mold with one mold and two functions provides a solution for streamlined mold injection production for enterprises that do not have injection molding equipment and injection mold production conditions.

[0024] 2. The present invention has a runner system for an injection mold, which uses the pressure of a hydraulic press to inject the chopped premix in the mold feeding cavity into the mold cavity through the mold runner and solidify it into shape. An insert groove is designed in the mold, so that composite materials with relatively complex structures and metal inserts can be formed at low cost and with high efficiency through the injection mold.

[0025] 3. The present invention also designs a demoulding frame and a demoulding frame, so that the overall technical solution has the effect of rapid demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the cross-sectional structure of the front view of the present invention;

[0027] Figure 2 It is a side view cross-sectional structural schematic diagram of the present invention;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the demoulding frame of the present invention;

[0029] Figure 4 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the mold withdrawal frame of the present invention.

[0031] In the figure: 1, bottom plate; 2, core fixing plate; 3, core baffle; 4, core seat; 5, sleeve; 6, core pressure plate; 7, arc-shaped convex core; 8, arc-shaped concave core; 9, inner core; 10, first screw; 11, second screw; 12, third screw; 13, feeding chamber; 14, feeding channel; 15, first slot; 16, first block; 17, guide column; 18, second block; 19, second slot; 20, third slot; 21, third block; 22, stripping plate; 23, stripping rod; 24, first ejection groove; 25, second ejection groove; 26, ejection plate; 27, ejection rod. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] As attached Figure 1 With attached Figure 2 As shown, the injection mold with two functions in one mold of the technical solution mainly consists of the following parts:

[0036] Bottom plate 1, core fixing plate 2, core baffle 3, core seat 4, arcuate convex core 7, inner core 9, sleeve 5, arcuate concave core 8, core pressing plate 6, feeding cavity 13, guide column 17, first screw 10, second screw 11, third screw 12.

[0037] The main body of the technical solution is the arc-shaped convex core 7, the inner core 9 and the arc-shaped concave core 8, which together constitute the cavity and flow channel system of the main molding product of the mold;

[0038] The inner mold core 9 is mainly used for fixing the inserts and forming the inner mold of the product;

[0039] The arc-shaped convex core 7 is mainly used to form the arc surface of the lower surface of the product;

[0040] The arc-shaped concave core 8 is mainly used for molding the upper mold surface of the product and positioning the position of the insert on the mold core, and a feeding channel 14 is designed inside it.

[0041] The bottom plate 1 and the core fixing plate 2 are connected and fixed with the inner core 9 by the first screws 10 .

[0042] The core baffle plate 3 and the core seat 4 are connected with a second screw 11 to further fix the core and play a role in guiding the core. The core baffle plate 3 and the core seat 4 are arranged on the upper ends of the base plate 1 and the core fixing plate 2. A first clamping groove 15 is arranged on the core seat 4, and first clamping blocks 16 are arranged on the left and right sides of the lower end of the arc-shaped convex core 7. The arc-shaped convex core 7 is fixed by the core seat 4 through the cooperation between the first clamping groove 15 and the first clamping block 16.

[0043] The bottom of the inner core 9 is arranged on the bottom plate 1 and the upper end slides through the core fixing plate 2, the core baffle plate 3 and the arc-shaped convex core 7 in sequence to penetrate into the cavity.

[0044] A guide column 17 is provided on the core baffle 3, and second clamping blocks 18 are provided on the left and right sides of the lower end of the guide column 17. A second clamping groove 19 is provided on the core seat 4. The guide column 17 is fixed to the core seat 4 through the cooperation between the second clamping groove 19 and the second clamping block 18.

[0045] The mold sleeve 5 and the core pressing plate 6 are connected by the third screw 12. At the same time, a guide hole is provided on the mold sleeve 5 to match the guide column 17. The mold sleeve 5 and the core pressing plate 6 are connected to the core baffle 3 and the core seat 4 through the cooperation between the guide column 17 and the guide hole.

[0046] A third slot 20 is provided on the mold sleeve 5, and third blocks 21 are provided on the left and right sides of the upper end of the arc-shaped concave core 8. The arc-shaped concave core 8 is fixed by the mold sleeve 5 through the cooperation between the third slot 20 and the third block 21. The height of the lower surface of the mold sleeve 5 is lower than the height of the upper surface of the arc-shaped convex core 7, so that the mold sleeve 5 limits the left and right sides of the arc-shaped convex core 7, thereby ensuring the alignment between the arc-shaped convex core 7 and the arc-shaped concave core 8.

[0047] The mold sleeve 5 and the core pressing plate 6 are mainly used to fix the positions of the arc-shaped concave core 8 and the arc-shaped convex core 7 so that the product molding dimensions meet the requirements of the drawings;

[0048] A feeding cavity 13 is provided at the upper end of the core pressing plate 6, and the feeding cavity 13 is connected with the feeding flow channel 14. After the thermosetting plastic is heated and melted through the feeding cavity 13, the material is injected into the cavity under pressure to fill the entire cavity. The feeding cavity 13 is mainly used for adding raw materials, and the material is squeezed into the cavity and formed under the pressure of the upper press.

[0049] As attached Figure 3 As shown, it is a demoulding frame, which is composed of a demoulding rod 23 and a demoulding plate 22. Its shape is the same as the position of the inner core 9. The size and length of the demoulding rod 23 are different. The demoulding frame is used to demould the product from the arc-shaped convex core 7. When the mold is pushed open by the demoulding frame, a part of it consisting of the core baffle 3, the core seat 4, the arc-shaped convex core 7 and the second screw 11 is taken out from the core hole and the product located above the arc-shaped convex core 7 is ejected by the demoulding frame.

[0050] As attached Figure 4 With attached Figure 5 As shown, the bottom plate 1, the core fixing plate 2, the core baffle plate 3, the core seat 4, the mold sleeve 5 and the core pressing plate 6 are provided with first die-removing grooves 24 and second die-removing grooves 25 which are staggered up and down.

[0051] The first mold withdrawal groove 24 penetrates the bottom plate 1, the core fixing plate 2, the core baffle plate 3, and the core seat 4, and the second mold withdrawal groove 25 penetrates the core baffle plate 3, the core seat 4, the mold sleeve 5, and the core pressing plate 6.

[0052] The demolding frame includes a demolding plate 26 and a plurality of demolding rods 27 arranged on the demolding plate 26. The plurality of demolding rods 27 match the distribution of the plurality of first demolding grooves 24 or the plurality of second demolding grooves 25. The length of the demolding rods 27 is greater than the length of the first demolding grooves 24 and the second demolding grooves 25.

[0053] There are one ejection frame at the top and one at the bottom. The ejection rod 27 is placed and inserted into the first ejection groove 24 or multiple second ejection grooves 25. By extruding up and down, after the product is formed and solidified, the mold is divided into three sections of the cavity and opened. The upper, middle and lower cavities are opened through the ejection frame to expose the product in the cavity, which can then be removed.

[0054] The principle of demolding by the demolding frame is as follows: when the demolding rod 27 is inserted, the end of the demolding rod 27 at the lower end abuts against the mold sleeve 5, and the end of the demolding rod 27 at the upper end abuts against the core fixing plate 2. Therefore, when the upper and lower forces are applied together, the force is not applied to the middle core baffle 3 and core seat 4. Therefore, by pushing hard, the upper and lower ends are separated from the middle core baffle 3 and core seat 4 to achieve the effect of mold separation.

[0055] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thermosetting plastic injection molding die, characterized in that: include: A bottom fixing assembly is used to fix the upper end of the forming mold; A middle baffle assembly is arranged at the upper end of the bottom core fixing assembly and is used to fix the side of the forming mold; An upper end fixing assembly is arranged at the upper end of the middle baffle assembly and is used to fix the upper end of the forming mold; A molding die, used for product molding, located between the bottom fixing assembly and the upper fixing assembly, with the side surface in contact with the middle baffle assembly; The upper fixed component is provided with a feeding cavity (13), and a feeding channel (14) connected to the feeding cavity (13) is provided inside, and the material is injected into the cavity of the molding die through the feeding cavity (13) and the feeding channel (14).

2. The thermosetting plastic injection molding die according to claim 1, characterized in that: The molding die comprises an arcuate convex core (7) located on the middle baffle assembly and whose upper end is limited by an upper end fixing assembly, and an arcuate concave core (8) arranged at the upper end of the arcuate convex core (7) and limited by the upper end fixing assembly. The arcuate convex core (7) and the arcuate concave core (8) form a cavity, an inner core (9) is arranged in the cavity, and the lower end of the inner core (9) passes through the arcuate convex core (7) and the middle baffle assembly in sequence and is fixed on the bottom fixing assembly. A feeding channel (14) is arranged in the arcuate concave core (8).

3. The thermosetting plastic injection molding die according to claim 2, characterized in that: The bottom fixing assembly comprises a bottom plate (1) and a core fixing plate (2) connected as a whole by a first screw (10); the bottom of the inner core (9) is arranged on the bottom plate (1) and the upper end slides through the core fixing plate (2).

4. The thermosetting plastic injection molding die according to claim 2, characterized in that: The middle baffle assembly comprises a core baffle (3) and a core seat (4) connected as a whole by a second screw (11); the inner core (9) penetrates and slides in the core baffle (3); the arc-shaped convex core (7) is arranged on the core baffle (3) and is limited on the left and right sides by the core seat (4).

5. The thermosetting plastic injection molding die according to claim 4, characterized in that: A first clamping groove (15) is provided on the core seat (4), and first clamping blocks (16) are provided on the left and right sides of the lower end of the arc-shaped convex core (7). The arc-shaped convex core (7) is fixed by the core seat (4) through the cooperation between the first clamping groove (15) and the first clamping block (16).

6. The thermosetting plastic injection molding die according to claim 4, characterized in that: A guide column (17) is arranged on the core baffle (3), and second clamping blocks (18) are arranged on the left and right sides of the lower end of the guide column (17). A second clamping groove (19) is arranged on the core seat (4), and the guide column (17) is fixed to the core seat (4) through the cooperation between the second clamping groove (19) and the second clamping block (18).

7. The thermosetting plastic injection molding die according to claim 6, characterized in that: The upper fixing assembly is provided with a guide hole which matches the guide post (17). The guide post (17) cooperates with the guide hole so that the upper fixing assembly and the middle baffle assembly are guided to ensure the shape and size of the product.

8. The thermosetting plastic injection molding die according to claim 2, characterized in that: The upper end fixing assembly comprises a mold sleeve (5) and a core pressing plate (6) connected as a whole by a third screw (12); a third clamping groove (20) is arranged on the mold sleeve (5); and third clamping blocks (21) are arranged on the left and right sides of the upper end of the arc-shaped concave core (8); the arc-shaped concave core (8) is fixed by the mold sleeve (5) through the cooperation between the third clamping groove (20) and the third clamping block (21); the lower surface height of the mold sleeve (5) is lower than the upper surface height of the arc-shaped convex core (7), so that the mold sleeve (5) limits the left and right sides of the arc-shaped convex core (7), thereby ensuring the alignment between the arc-shaped convex core (7) and the arc-shaped concave core (8).

9. The thermosetting plastic injection molding die according to claim 1, characterized in that: It also comprises a demoulding frame, which comprises a demoulding plate (22) and a demoulding rod (23) arranged at the upper end of the demoulding plate (22). The demoulding frame is used to demould the product from the molding mold after molding is completed.

10. The thermosetting plastic injection molding die according to claim 1, characterized in that: The invention also comprises a die-removing frame, wherein the bottom fixing assembly, the middle baffle assembly and the upper fixing assembly are provided with first die-removing grooves (24) and second die-removing grooves (25) which are staggered in upper and lower directions, the first die-removing grooves (24) penetrate the bottom fixing assembly and the middle baffle assembly, and the second die-removing grooves (25) penetrate the upper fixing assembly and the middle baffle assembly, and the die-removing frame comprises a die-removing plate (26) and a plurality of die-removing rods (27) arranged on the die-removing plate (26), the plurality of die-removing rods (27) match the distribution of the plurality of first die-removing grooves (24) or the plurality of second die-removing grooves (25), and the length of the die-removing rods (27) is greater than the length of the first die-removing grooves (24) and the second die-removing grooves (25).

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