Multi-density EPS forming mold core assembly and injection mold
By designing a multi-density EPS forming core assembly, the molding cavity is divided into multiple spaces using the barrier drive assembly and the barrier plate, and the simultaneous forming of different density EPS is achieved, which solves the problems of low production efficiency and high cost, and improves the production efficiency and Product pass rate.
Patent Information
- Application Number
- CN202420482422.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-12
AI Technical Summary
When producing EPS helmet guards of various densities, the prior art leads to low production efficiency and high cost, and is prone to waste of materials.
A multi-density EPS forming core assembly is designed, including an upper and lower core plates. The molding cavity is divided into multiple spaces through the barrier drive assembly and the barrier plate, so as to achieve simultaneous molding of different density EPS and through telescopic retraction. The drive of the cylinder and the drive plate controls the bonding and separation of the barrier plate, and realizes the connection of EPS bodies of different densities during the first forming process.
Improve production efficiency, reduce subsequent processing steps, reduce labor costs, avoid material waste, and improve product qualification rate.
Smart Images
Figure CN222135714U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of injection molds, in particular to a multi-density EPS molding mold core component and an injection mold. Background Art
[0002] An injection mold is a mold used to produce injection molded products. It usually consists of a mold base, an upper mold plate, a lower mold plate, guide pins, guide sleeves, ejector pins, ejector pins, positioning rings, screws, mold plates, cooling systems and other components. The working principle of an injection mold is to inject molten plastic into the mold cavity and form the desired plastic product after cooling. Injection molds can produce a variety of complex plastic products, such as auto parts, home appliance accessories, daily necessities, etc. The quality and performance of injection molds directly affect the molding quality and production efficiency of plastic products, so they play a very important role in injection molding production. With the continuous development of science and technology, the design and manufacturing technology of injection molds are also constantly improving to meet the market demand for high-quality and high-precision plastic products.
[0003] Among them, EPS board (also known as benzene board) is the abbreviation of expandable polystyrene board. It is a polystyrene foam plastic board with a closed-cell structure made by pre-foaming expandable polystyrene beads and then heating and molding them in a mold. It is made of raw materials through pre-expansion, maturation, molding, drying and cutting. It can be made into foam products of different densities and shapes, and can also produce foam boards of various thicknesses. It has the advantages of light weight, low price, low thermal conductivity, low water absorption, good electrical insulation, sound insulation, shockproof, moisture-proof, and simple molding process. Therefore, it is widely used as thermal insulation, sound insulation, and earthquake-resistant materials for buildings, ships, automobiles, trains, refrigeration, and freezing. Using EPS boards in helmets can effectively improve the shock resistance and protection effect of helmets. However, for a helmet protective gear with multiple different densities, it is necessary to cut and mold EPS materials of different densities separately, and then fix them by gluing to form a whole, which has low production efficiency and is easy to cause waste of EPS materials of different densities, and the production cost is high. Utility Model Content
[0004] The utility model aims to provide a multi-density EPS molding core component and an injection mold, aiming to improve the problems of high production cost and low production efficiency for helmet protective gear composed of EPS of various densities.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A multi-density EPS molding mold core assembly comprises an upper mold core plate and a lower mold core plate, wherein the upper mold core plate is covered on the lower mold core plate and encloses a molding cavity, wherein a blocking channel and at least two injection ports are provided on the upper mold core plate, wherein the blocking channel is located between the injection ports, and the blocking channel and the injection ports are connected to the molding cavity.
[0007] A blocking drive assembly is fixed on the upper mold core plate, a blocking plate is fixed on the driving end of the blocking drive assembly, the blocking plate is embedded in the blocking channel, the bottom surface of the blocking plate is a fitting surface, the shape of the fitting surface matches the shape of the corresponding position of the lower mold core plate, and the blocking drive assembly drives the fitting surface of the blocking plate to fit or separate from the lower mold core plate.
[0008] Furthermore, the blocking drive assembly includes a telescopic cylinder and a drive plate, one end of the drive plate is fixedly connected to the drive end of the telescopic cylinder, the other end of the drive plate is fixedly connected to the top of the blocking plate, and the telescopic cylinder is fixed on the upper mold core plate.
[0009] Furthermore, connecting arms extending outward are arranged on both sides of the other end of the driving plate, and the free ends of the connecting arms are fixedly connected to the top surface of the blocking plate.
[0010] Furthermore, the plurality of injection ports include a first injection port and a second injection port, the blocking plate and the blocking channel are tilted toward the first injection port, the blocking plate is provided with a clearance gap, and the clearance gap is located in the extension direction of the first injection port.
[0011] Furthermore, a feed pipe is fixed on the first injection port, and the feed pipe extends vertically upward through the clearance gap.
[0012] Furthermore, an insert groove is formed on the lower mold core plate, an insert is embedded in the insert groove, and the top end of the insert protrudes from the insert groove and extends into the molding cavity.
[0013] Furthermore, a convex eave is provided on the top side of the blocking plate, and the convex eave is located above the opening of the blocking channel. The size of the convex eave is larger than the opening size of the blocking channel.
[0014] Furthermore, a plurality of positioning grooves are provided on the bottom surface of the upper mold core plate, and a plurality of positioning blocks are provided on the top surface of the lower mold core plate. The plurality of positioning blocks correspond to the positioning grooves one by one and are respectively embedded in the positioning grooves.
[0015] Furthermore, indicating grooves are provided on the bottom surface of the upper mold core plate and the top surface of the lower mold core plate.
[0016] In order to achieve the above purpose, the utility model also adopts the following technical solutions:
[0017] An injection mold comprises a mold body and the above-mentioned multi-density EPS molding core component, wherein the multi-density EPS molding core component is fixed in the mold body.
[0018] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:
[0019] In this solution, the blocking drive assembly drives the blocking plate to enter the molding cavity and abut against the upper surface of the lower mold core plate. The side wall of the blocking plate fits against the inner wall of the upper mold core plate. The blocking plate divides the molding cavity into a first molding space and a second molding space. The first body and the second body of the helmet guard are molded in the first molding space and the second molding space respectively. Different feeding times are set according to the densities of different bodies to achieve simultaneous molding of EPS bodies of different densities in one molding process. At the same time, after the feeding is completed, the blocking plate leaves the molding cavity to connect the first body and the second body, avoiding the need to bond the first body and the second body in subsequent processing, saving labor costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic structural diagram of the multi-density EPS molding core assembly of the utility model;
[0021] Figure 2 This is a schematic cross-sectional structure diagram of the first state of the multi-density EPS molding core assembly of the utility model;
[0022] Figure 3 This is a schematic cross-sectional structure diagram of the second state of the multi-density EPS molding core assembly of the utility model;
[0023] Figure 4 This is a schematic diagram of the bottom structure of the multi-density EPS molding core assembly of the utility model from an exploded perspective;
[0024] Figure 5 This is a schematic diagram of the top structure of the multi-density EPS molding core assembly of the utility model from an exploded perspective;
[0025] Figure 6 This is a schematic diagram of the blocking drive assembly and the blocking plate structure of the multi-density EPS molding core assembly of the utility model;
[0026] Figure 7 It is a schematic diagram of the upper mold core plate structure of the multi-density EPS molding mold core assembly described in the utility model.
[0027] Description of reference numerals:
[0028] 1. Upper mold core plate; 101. First injection port; 102. Second injection port; 103. Blocking channel; 104. Positioning groove; 105. Indicating groove;
[0029] 2. Lower mold core plate; 201. Insert groove; 202. Insert; 203. Positioning block;
[0030] 3. Molding cavity; 301. First molding space; 302. Second molding space;
[0031] 4. Blocking drive assembly; 401. Telescopic cylinder; 402. Drive plate; 4021. Connecting arm; 403. Support rod;
[0032] 5. blocking plate; 501. fitting surface; 502. clearance gap; 503. convex eaves;
[0033] 6. Feed pipe. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0035] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0036] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0037] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.
[0038] Example
[0039] Please refer to Figure 1-7As shown, this embodiment provides a multi-density EPS molding core assembly for molding a helmet protector. The specific EPS helmet protector includes a first body and a second body that are integrally molded. The EPS densities of the first body and the second body are different, and the connecting surface of the first body and the second body is an inclined surface.
[0040] Please refer to Figure 2 and Figure 3 As shown, the multi-density EPS molding core assembly includes an upper mold core plate 1 and a lower mold core plate 2, the upper mold core plate 1 is covered on the lower mold core plate 2, and encloses to form a molding cavity 3, and the molding cavity 3 is used to mold the helmet protective gear. A blocking channel 103 and at least two injection ports are opened on the upper mold core plate 1, and the blocking channel 103 is located between the injection ports. The blocking channel 103 and the injection ports are connected to the molding cavity 3. In this embodiment, the number of injection ports is two, including a first injection port 101 and a second injection port 102, respectively. The first injection port 101 and the second injection port 102 are respectively used to inject the first body and the second body. According to different EPS densities, different feeding times are set respectively to improve the qualified rate of the product. Similarly, according to the division of different density bodies of the product, three or more injection ports can be set, and partitions can be added according to different density intervals, that is, when the number of bodies of different densities of the product is N, the number of partitions is (N-1). One-time injection molding of products with multiple densities is achieved.
[0041] The upper mold core plate 1 is fixed with a blocking driving assembly 4, and a blocking plate 5 is fixed to the driving end of the blocking driving assembly 4. The blocking plate 5 is embedded in the blocking channel 103, and the bottom surface of the blocking plate 5 is a fitting surface 501. The shape of the fitting surface 501 matches the shape of the corresponding position of the lower mold core plate 2. The blocking driving assembly 4 drives the fitting surface 501 of the blocking plate 5 to fit or separate from the lower mold core plate 2. Please refer to Figure 2 As shown, when the blocking driving assembly 4 drives the contact surface 501 of the blocking plate 5 to contact the lower mold core plate 2, the molding cavity 3 is divided into a first molding space 301 and a second molding space 302 by the blocking plate 5, and the first body and the second body are molded in the first molding space 301 and the second molding space 302 respectively. Figure 3 and Figure 3As shown, after the density of the first body and the second body in the first molding space 301 and the second molding space 302 reaches the requirement, the blocking drive assembly 4 drives the blocking plate 5 upward, and the fitting surface 501 moves to the outside of the molding cavity 3, and the first molding space 301 and the second molding space 302 are connected, so that the edges of the first body and the second body are close to each other until they contact and adhere to each other. The bodies with higher density are fed synchronously to ensure that the density of the first body and the second body meets the requirements and improve the finished product yield of the helmet protective gear. In the one-time molding process, the helmet protective gear composed of two EPS bodies with different densities is realized, and the subsequent adhesion steps of the first body and the second body are reduced, and the production efficiency is higher.
[0042] Please refer to Figure 1-6 As shown, in this embodiment, the blocking drive assembly 4 includes a telescopic cylinder 401 and a drive plate 402, one end of the drive plate 402 is fixedly connected to the drive end of the telescopic cylinder 401, and the other end of the drive plate 402 is fixedly connected to the top of the blocking plate 5, and the telescopic cylinder 401 is fixed on the upper mold core plate 1. Specifically, the drive end of the telescopic cylinder 401 faces downward, and four support rods 403 are fixed to the bottom of the telescopic cylinder 401, and the four support rods 403 are respectively located at the four corners of the bottom of the telescopic cylinder 401, which provide good support for the telescopic cylinder 401. The ends of the support rods 403 are fixedly connected to the upper mold core plate 1 to fix the telescopic cylinder 401.
[0043] The other end of the driving plate 402 is provided with connecting arms 4021 extending outward on both sides, and the free ends of the connecting arms 4021 are fixedly connected to the top surface of the blocking plate 5. Two connecting arms 4021 are provided to connect the top two sides of the blocking plate 5 to ensure that the driving force applied to the blocking plate 5 by the telescopic cylinder 401 can act evenly on the blocking plate 5, thereby improving the stability of the driving plate 402 during the upward or downward movement, thereby ensuring that the fitting surface 501 of the blocking plate 5 can be in close contact with the lower mold core plate 2, ensuring that the blocking plate 5 has a good segmentation effect on the molding cavity 3, and making the multi-density EPS molding mold core assembly more accurate in controlling the density of the first body and the second body.
[0044] In this embodiment, the blocking plate 5 and the blocking channel 103 are arranged to be inclined toward the first injection port 101, that is, the inclination direction of the blocking plate 5 and the blocking channel 103 is the same as the inclination direction of the inclined surface. A clearance notch 502 is arranged on the blocking plate 5, and the clearance notch 502 is located in the extension direction of the first injection port 101. A feed pipe 6 is fixed on the first injection port 101, and the feed pipe 6 extends vertically upward through the clearance notch 502. The clearance notch 502 makes way for the space above the first injection port 101 to avoid affecting the extension of the feed pipe 6, reduce the layout length of the feed pipe 6, and reduce the cost.
[0045] In this embodiment, a convex eave 503 is provided on the top side of the blocking plate 5, and the convex eave 503 is located above the opening of the blocking channel 103, and the size of the convex eave 503 is larger than the opening size of the blocking channel 103. The convex eave 503 abuts against the upper opening of the blocking channel 103, and plays a limiting role on the blocking plate 5, so as to prevent the telescopic cylinder 401 from driving the blocking plate 5 to move downward excessively, causing the blocking plate 5 to apply excessive thrust to the lower mold core plate 2, causing the blocking plate 5 and the lower mold core plate 2 to be deformed and damaged, thereby increasing the service life of the blocking plate 5 and the lower mold core plate 2 and reducing costs. At the same time, the energy loss of the telescopic cylinder 401 is reduced, further reducing costs.
[0046] Please refer to Figure 2 and Figure 3 As shown, an insert groove 201 is provided on the lower mold core plate 2, and an insert 202 is embedded in the insert groove 201. The top of the insert 202 protrudes from the insert groove 201 and extends into the molding cavity 3. In this embodiment, the insert 202 is detachably fixed in the insert groove 201 by bolts. After the molding is completed, the insert 202 is demoulded along with the helmet guard. The insert 202 and the helmet guard are subsequently separated to realize the molding of the holes or grooves on the helmet guard. Similarly, during the demoulding process, the insert 202 can exert a downward limiting force on the product, so that the helmet guard can be better separated from the upper mold core plate 1. The bolts are subsequently opened to realize the disassembly of the insert 202, and the demoulding of the helmet guard is carried out in steps to avoid damage to the helmet guard by the mold during the demoulding process and reduce product loss.
[0047] Please refer to Figure 4 and Figure 5 As shown, a plurality of positioning grooves are provided on the bottom surface of the upper mold core plate 1, and a plurality of positioning blocks 203 are provided on the top surface of the lower mold core plate 2. The plurality of positioning blocks 203 correspond to the positioning grooves one by one and are respectively embedded in the positioning grooves. This ensures that the upper mold core plate 1 and the lower mold core plate 2 are positioned more accurately when the mold is closed, thereby improving the structural accuracy of the helmet protective gear and the qualified rate of the product.
[0048] Indicator grooves 105 are provided on the bottom surface of the upper mold core plate 1 and the top surface of the lower mold core plate 2. The indicator grooves 105 remind the construction personnel to avoid installation errors of the upper mold core plate 1 and the lower mold core plate 2, so that the installation direction of the upper mold core plate 1 or the lower mold core plate 2 is reversed, resulting in a collision between the upper mold core plate 1 and the lower mold core plate 2 during the mold closing process, causing damage to the mold.
[0049] This embodiment also provides an injection mold, including a mold body and the above-mentioned multi-density EPS molding core assembly, and the multi-density EPS molding core assembly is fixed in the mold body.
[0050] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A multi-density EPS molding core assembly, characterized in that: The mold comprises an upper mold core plate and a lower mold core plate, wherein the upper mold core plate is covered on the lower mold core plate and encloses a molding cavity, and a blocking channel and at least two injection ports are provided on the upper mold core plate, wherein the blocking channel is located between the injection ports, and the blocking channel and the injection ports are connected to the molding cavity. A blocking drive assembly is fixed on the upper mold core plate, a blocking plate is fixed on the driving end of the blocking drive assembly, the blocking plate is embedded in the blocking channel, the bottom surface of the blocking plate is a fitting surface, the shape of the fitting surface matches the shape of the corresponding position of the lower mold core plate, and the blocking drive assembly drives the fitting surface of the blocking plate to fit or separate from the lower mold core plate.
2. The multi-density EPS molding core assembly according to claim 1, characterized in that: The blocking drive assembly includes a telescopic cylinder and a drive plate, one end of the drive plate is fixedly connected to the drive end of the telescopic cylinder, and the other end of the drive plate is fixedly connected to the top of the blocking plate. The telescopic cylinder is fixed on the upper mold core plate.
3. The multi-density EPS molding core assembly according to claim 2, characterized in that: Connecting arms extending outward are arranged on both sides of the other end of the driving plate, and the free ends of the connecting arms are fixedly connected to the top surface of the blocking plate.
4. The multi-density EPS molding core assembly according to claim 1, characterized in that: The plurality of injection ports include a first injection port and a second injection port, the blocking plate and the blocking channel are tilted toward the first injection port, a clearance gap is provided on the blocking plate, and the clearance gap is located in the extension direction of the first injection port.
5. The multi-density EPS molding core assembly according to claim 4, characterized in that: A feed pipe is fixed on the first injection port, and the feed pipe extends vertically upward through the clearance gap.
6. The multi-density EPS molding core assembly according to claim 1, characterized in that: An insert groove is formed on the lower mold core plate, an insert is embedded in the insert groove, and a top end of the insert protrudes from the insert groove and extends into the molding cavity.
7. The multi-density EPS molding core assembly according to claim 1, characterized in that: A convex eave is arranged on the top side of the blocking plate, and the convex eave is located above the opening of the blocking channel. The size of the convex eave is larger than the opening of the blocking channel.
8. The multi-density EPS molding core assembly according to claim 1, characterized in that: A plurality of positioning grooves are provided on the bottom surface of the upper mold core plate, and a plurality of positioning blocks are provided on the top surface of the lower mold core plate. The plurality of positioning blocks correspond to the positioning grooves one by one and are respectively embedded in the positioning grooves.
9. The multi-density EPS molding core assembly according to claim 1, characterized in that: The bottom surface of the upper mold core plate and the top surface of the lower mold core plate are both provided with indicating grooves.
10. An injection mold, characterized in that: It comprises a mould body and a multi-density EPS moulding core assembly as claimed in any one of claims 1 to 9, wherein the multi-density EPS moulding core assembly is fixed in the mould body.