Bakelite injection molding equipment
By combining the inclined column with the mating hole and using ejector pins, the problem of breakage and scratches of bakelite products during demolding is solved, achieving smooth demolding of bakelite products and efficient use of the mold.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN CHENGXIN ELECTRONIC PLASTIC CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-30
AI Technical Summary
In the prior art, bakelite products are prone to breakage or surface scratches during demolding due to increased friction, especially bakelite products with bosses or ribs around the perimeter.
By using a combination of inclined columns and mating holes, the vertical movement of the upper mold is converted into the horizontal movement of the molding blocks. The demolding of bakelite products is achieved through the synchronous separation of the first and second molding blocks. Combined with the ejection operation of the ejector pins, uneven friction caused by unilateral drive is avoided.
It enables smooth demolding of bakelite products, reduces the risk of breakage and surface scratches, and improves the service life of the mold and demolding efficiency.
Smart Images
Figure CN224426360U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of injection molding technology, and in particular to a bakelite injection molding apparatus. Background Technology
[0002] In related technologies, most use a single ejector pin or a simple array of ejector pins for demolding bakelite products. That is, ejector pins are used to push bakelite products out of the mold. For bakelite products with bosses or ribs around the perimeter, the contact area with the mold core is large, which increases the friction during demolding and can easily cause the bakelite products to break or have surface scratches.
[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0004] In view of at least one of the above technical problems, this application provides a bakelite injection molding apparatus.
[0005] This application provides a bakelite injection molding apparatus, the apparatus comprising:
[0006] A molding die includes a die body, a die core, a first molding block, and a second molding block. The die core is fixed in the die body, and the first molding block and the second molding block are movably disposed on both sides of the die core. The first molding block is provided with a first mating hole, and the second molding block is provided with a second mating hole.
[0007] The upper mold is symmetrically provided with a first inclined post and a second inclined post. The first inclined post mates with a first mating hole, and the second inclined post mates with a second mating hole.
[0008] Ejector pins, which are multiple and movably inserted into the mold core.
[0009] This bakelite injection molding device converts the vertical movement of the upper mold into the horizontal movement of the first molding block and the second molding block by the first inclined column engaging with the first mating hole and the second inclined column engaging with the second mating hole. This allows the first molding block and the second molding block to separate from the bakelite product simultaneously during demolding, facilitating the subsequent demolding of the bakelite product by ejector pins.
[0010] In some possible implementations, the movement direction of the first forming block and the second forming block is perpendicular to the movement direction of the upper mold.
[0011] In some possible implementations, the first and second inclined columns are arranged in a figure-eight pattern.
[0012] In some possible implementations, the first inclined post and the second inclined post are both cylinders, and the first mating hole and the second mating hole are both circular holes.
[0013] In some possible implementations, the molding die includes a left abutment block and a right abutment block, both of which are installed in the mold body. The left abutment block is located on one side of the first molding block, and the right abutment block is located on one side of the second molding block.
[0014] In some possible implementations, the first molding block includes a first sliding part and a first molding part. The first sliding part is movably disposed on one side of the mold core, and the first molding part is fixed on the first sliding part. The surface of the first molding part facing the mold core has a first molding protrusion.
[0015] In some possible implementations, the second molding block includes a second sliding part and a second molding part. The second sliding part is movably disposed on one side of the mold core, and the second molding part is fixed on the second sliding part. The surface of the second molding part facing the mold core has a second molding protrusion.
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is an exploded view of the structure of the bakelite injection molding apparatus provided in the embodiments of this application;
[0019] Figure 2 This is a schematic diagram of the molding die provided in the embodiments of this application;
[0020] In the picture:
[0021] 100. Molding mold; 110. Mold body; 120. Mold core; 130. First molding block; 140. Second molding block; 150. Left abutment block;
[0022] 160. Right abutment block;
[0023] 131. First sliding part; 132. First forming part; 141. Second sliding part; 142. Second forming part;
[0024] 200. Upper mold; 210. First inclined column; 220. Second inclined column;
[0025] 300. Threshold pin; Detailed Implementation
[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a bakelite injection molding apparatus, which includes: a molding die 100, an upper die 200, and an ejector pin 300.
[0028] The molding die 100 includes a die body 110, a die core 120, a first molding block 130, and a second molding block 140. The die core 120 is fixed in the die body 110. The first molding block 130 and the second molding block 140 are movably disposed on both sides of the die core 120. The first molding block 130 is provided with a first mating hole, and the second molding block 140 is provided with a second mating hole. The upper die 200 is symmetrically provided with a first inclined post 210 and a second inclined post 220. The first inclined post 210 mates with the first mating hole, and the second inclined post 220 mates with the second mating hole. Multiple ejector pins 300 are movably disposed in the die core 120.
[0029] This bakelite injection molding device converts the vertical movement of the upper mold 200 into the horizontal movement of the first molding block 130 and the second molding block 140 by engaging the first inclined column 210 with the first mating hole and the second inclined column 220 with the second mating hole. This allows the first molding block 130 and the second molding block 140 to separate from the bakelite product simultaneously during demolding, facilitating the subsequent demolding of the bakelite product by ejector pin 300.
[0030] The upper mold 200 is symmetrically provided with a first inclined column 210 and a second inclined column 220, wherein the inclination angle of the first inclined column 210 is 20° and the inclination angle of the second inclined column 220 is 20°. The bottom ends of the first inclined column 210 and the second inclined column 220 are both hemispherical. Thus, the first inclined column 210 and the first molding block 130 form an inclined top sliding pair, and the second inclined column 220 and the second molding block 140 form an inclined top sliding pair.
[0031] During the mold closing stage, the upper mold 200 moves downward, and the first inclined pillar 210 and the second inclined pillar 220 are inserted into the first and second mating holes, respectively. The inclined surfaces push the first molding block 130 and the second molding block 140 laterally towards the mold core 120 until the three parts are assembled to form a complete cavity. During the injection molding stage, molten bakelite material is injected into the cavity through the gating system, and then held under pressure and cooled to form the final shape. During the demolding stage, the upper mold 200 rises, and the first inclined pillar 210 and the second inclined pillar 220 slide into the inclined tops of the mating holes. The first and second molding blocks 140 retract laterally; the ejector pins 300, driven by the ejector pins, push the bakelite product upward, completing the demolding process.
[0032] like Figure 1 and Figure 2 As shown, in some embodiments, the moving directions of the first molding block 130 and the second molding block 140 are perpendicular to the moving direction of the upper mold 200.
[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the first inclined column 210 and the second inclined column 220 are arranged in a figure-eight pattern.
[0034] Understandably, the projections of the first inclined column 210 and the second inclined column 220 on the horizontal plane form a figure-eight shape. This avoids the problems of asynchronous movement of the molding block and misalignment of the cavity that may be caused by driving the inclined column on one side, and ensures that the fitting accuracy of the parting surfaces on both sides is ≤0.03mm.
[0035] During mold closing, the upper mold 200 descends, and the first inclined column 210 and the second inclined column 220 insert into the mating holes. As the upper mold 200 continues to descend, the inclined columns synchronously push the first and second forming blocks 140 toward the center of the mold core 120 through the horizontal component force. Due to the figure-eight layout, the forming blocks on both sides are subjected to symmetrical forces and move at the same speed, eventually synchronously abutting against the mold core 120 to complete mold closing.
[0036] like Figure 1 and Figure 2 As shown, in some embodiments, the first inclined post 210 and the second inclined post 220 are both cylinders, and the first mating hole and the second mating hole are both round holes.
[0037] like Figure 1 and Figure 2 As shown, in some embodiments, the molding mold 100 includes a left abutment block 150 and a right abutment block 160. Both the left abutment block 150 and the right abutment block 160 are installed in the mold body 110. The left abutment block 150 is located on one side of the first molding block 130, and the right abutment block 160 is located on one side of the second molding block 140.
[0038] A buffer layer is provided on the surface of the left abutment block 150 facing the first molding block 130, and a buffer layer is provided on the surface of the right abutment block 160 facing the second molding block 140. In this way, the rubber layers can reduce the rigid impact between the molding block and the abutment block, reduce noise, and extend the service life of the mold.
[0039] like Figure 1 and Figure 2 As shown, in some embodiments, the first molding block 130 includes a first sliding part 131 and a first molding part 132. The first sliding part 131 is movably disposed on one side of the mold core 120, and the first molding part 132 is fixed on the first sliding part 131. The surface of the first molding part 132 facing the mold core 120 has a first molding protrusion.
[0040] like Figure 1 and Figure 2 As shown, in some embodiments, the second molding block 140 includes a second sliding portion 141 and a second molding portion 142. The second sliding portion 141 is movably disposed on one side of the mold core 120, and the second molding portion 142 is fixed on the second sliding portion 141. The surface of the second molding portion 142 facing the mold core 120 has a second molding protrusion.
[0041] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0042] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0044] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0045] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0046] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.
Claims
1. A bakelite injection molding apparatus, characterized in that, The device includes: A molding die, comprising a die body, a die core, a first molding block, and a second molding block, wherein the die core is fixed in the die body, and the first molding block and the second molding block are movably disposed on both sides of the die core, wherein the first molding block is provided with a first mating hole, and the second molding block is provided with a second mating hole; The upper mold is symmetrically provided with a first inclined post and a second inclined post, the first inclined post is engaged with the first mating hole, and the second inclined post is engaged with the second mating hole; Ejector pins, having a plurality of them, are movably inserted into the mold core.
2. The bakelite injection molding apparatus according to claim 1, characterized in that, The moving directions of the first molding block and the second molding block are perpendicular to the moving direction of the upper mold.
3. The bakelite injection molding apparatus according to claim 1, characterized in that, The first and second inclined columns are arranged in a figure-eight pattern.
4. The bakelite injection molding apparatus according to claim 1, characterized in that, Both the first inclined post and the second inclined post are cylindrical, and both the first mating hole and the second mating hole are circular holes.
5. The bakelite injection molding apparatus according to claim 1, characterized in that, The molding die includes a left abutment block and a right abutment block, both of which are installed in the mold body. The left abutment block is located on one side of the first molding block, and the right abutment block is located on one side of the second molding block.
6. The bakelite injection molding apparatus according to claim 1, characterized in that, The first molding block includes a first sliding part and a first molding part. The first sliding part is movably disposed on one side of the mold core, and the first molding part is fixed on the first sliding part. The first molding part has a first molding protrusion on its surface facing the mold core.
7. The bakelite injection molding apparatus according to claim 1, characterized in that, The second molding block includes a second sliding part and a second molding part. The second sliding part is movably disposed on one side of the mold core, and the second molding part is fixed on the second sliding part. The surface of the second molding part facing the mold core has a second molding protrusion.