A mold facilitating demolding

Abstract

The utility model relates to the technical field of molds, and particularly relates to a mold convenient for demolding, which comprises a processing table. At the four corners of the upper end surface of the processing table, support columns are fixedly connected. The upper ends of the support columns are fixedly connected with a top plate. A lower mold is arranged on the upper surface of the processing table. An upper mold is arranged at the bottom of the top plate. A cylinder is arranged at the top of the top plate. The output shaft of the cylinder passes through the top plate and is connected with the top of the upper mold. An upper cavity is formed on one side of the upper mold opposite to the lower mold. A plurality of ejector pins are slidably arranged at the bottom of the upper cavity. At least one linkage rod is slidably arranged on both sides of the opening of the upper cavity of the upper mold. A linkage structure is arranged between the linkage rod and the ejector pin, which can make the top surface of the ejector pin be at the same horizontal plane as the bottom of the upper cavity when the end of the linkage rod abuts against the lower mold. The beneficial effect of the utility model is to provide a mold convenient for demolding, which can quickly demold and does not damage the product.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a mold that is easy to demold. Background Technology

[0002] Injection molds are tools used to produce plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used to mass-produce certain complex-shaped parts.

[0003] However, the demolding effect of existing molds is generally poor, and they cannot demold quickly. The demolding process in current molds is usually as follows: after opening the upper mold, the product after injection molding is lifted by the ejector pin assembly set in the lower mold to achieve demolding. For example, an ultra-precision high-precision composite plastic mold with publication number "CN222792858U" uses a motor, threaded sleeve, threaded sleeve and ejector plate to cooperate. After the mold is shaped, the motor is started. The motor drives the threaded sleeve to rotate. The rotation of the threaded sleeve drives the threaded sleeve to move upward, which drives the ejector plate to move upward and causes the connecting rod and the limiting block to slide in the limiting groove. The movement of the ejector plate drives the shaped mold to be ejected. This achieves the purpose of facilitating the ejection of the mold.

[0004] The above document lacks a demolding structure in the upper mold. As a result, it was found during use that if the product has a strong adhesion to the upper mold, the upper mold may stick to the product when it moves upward during mold opening, causing product damage and making it impossible to demold completely. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a mold that can be quickly demolded without damaging the product, in order to address the shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a mold for easy demolding, comprising a processing table, characterized in that: a support column is fixedly connected to the upper surface of the processing table at its four corners, a top plate is fixedly connected to the upper end of the support column, a lower mold is provided on the upper surface of the processing table, an upper mold is provided at the bottom of the top plate, and a cylinder is provided at the top of the top plate. The output shaft of the cylinder passes through the top plate and is connected to the top of the upper mold. An upper cavity is opened on the side of the upper mold opposite to the lower mold. Several ejector pins are slidably provided at the bottom of the upper cavity. At least one linkage rod is slidably provided on both sides of the opening of the upper cavity. A linkage structure is provided between the linkage rod and the ejector pin, which can cause the top surface of the ejector pin to be on the same horizontal plane as the bottom of the upper cavity when the end of the linkage rod abuts against the lower mold.

[0007] The above technical solution, compared with the existing technology where the upper mold lacks a demolding structure, utilizes a linkage rod. When the upper and lower molds are separated, both the linkage rod and the ejector pin are protruding. When the cylinder pushes the upper mold closer to the lower mold for mold closing, the linkage rod abuts against the lower mold and is compressed, causing the linkage rod to retract into the lower mold. Simultaneously, through the linkage structure, the retraction of the linkage rod drives the retraction of the ejector pin, making the top surface of the ejector pin and the bottom of the upper cavity the same horizontal plane, allowing injection molding to proceed. After injection molding is completed and cooled, the cylinder is activated to move the upper mold upward. At this point, the force resisting the linkage rod disappears, the linkage rod resets, and the ejector pin resets, thereby the ejector pin pushes the formed product, achieving demolding of the product part located in the upper cavity.

[0008] A further feature of this invention is that the linkage structure includes a sliding plate at the top of the linkage rods on both sides, the ejector pins are arranged sequentially on the sliding plate, the upper mold has a sliding cavity for longitudinal movement of the sliding plate, the upper mold also has a sliding space for sliding of the linkage rods, and a number of elastic elements are provided between the sliding cavity and the sliding plate.

[0009] The above technical solution is as follows: During use, when the mold is closed, the linkage rod abuts against the lower mold and moves upward along the sliding space, driving the sliding plate to move upward along the sliding cavity, thereby causing the ejector pin to move, so that the top surface of the ejector pin is on the same horizontal plane as the bottom of the upper cavity. At this time, the elastic element is compressed. When the injection molding is completed and the mold is opened, the upper mold moves upward, the force against the linkage rod disappears, the elastic potential energy of the elastic element is released, and the sliding plate, ejector pin and linkage rod are pushed to reset, so that the ejector pin can push the molded product to separate from the upper cavity and complete the demolding.

[0010] A further feature of this invention is that a through hole is provided on the bottom of the upper cavity for the ejector pin to pass through, and the through hole is connected to the sliding cavity.

[0011] The above technical solution ensures the effectiveness of the ejector pin by setting through holes that are connected to the sliding cavity.

[0012] A further feature of this invention is that the four sides of the upper mold located at the opening of the upper cavity are chamfered, and the four sides of the top of the lower mold are provided with chamfered grooves corresponding to the chamfered areas of the upper mold.

[0013] The above technical solution, through the setting of chamfers and chamfer grooves, can play a positioning role during mold closing, ensuring that the upper mold can be tightly closed with the lower mold.

[0014] A further feature of this invention is that the back of the upper mold is provided with an injection hole.

[0015] The above technical solution ensures normal injection molding by setting up injection holes.

[0016] A further feature of this invention is that: the lower mold has a lower cavity, the bottom of the lower cavity has a placement groove, the placement groove has a push plate, the bottom of the processing table has an electric push rod, the output end of the electric push rod has a fixing plate, and the fixing plate and the push plate are connected by a connecting plate.

[0017] Using the above technical solution: After the upper mold is demolded, the electric push rod is activated to drive the push plate to move upward, so that the product can be completely demolded and separated from the lower cavity.

[0018] A further feature of this invention is that: the bottom of the processing table is provided with a mounting bracket for mounting an electric push rod; the outer wall of the electric push rod is provided with two symmetrical mounting covers; a mounting hole for mounting the electric push rod is formed between the mounting covers; and two first mounting blocks are symmetrically provided on opposite sides of the mounting covers, while a second mounting block for mounting with the mounting bracket is provided on the other side of the mounting covers.

[0019] The above technical solution facilitates the assembly of electric push rods onto the processing table by setting up mounting brackets and mounting covers.

[0020] A further feature of this invention is that a water inlet is provided on one side of the lower mold, and a water outlet is provided on the other side. A flow channel is provided between the water inlet and the water outlet, and the cross-section of the flow channel is curved in an "S" shape.

[0021] The above technical solution achieves the cooling function of the mold by setting up water inlet holes, water outlet holes and flow channels, which accelerates the formation of products. At the same time, the flow channel is set in a curved "S" shape, which extends the flow path of the coolant and prolongs the cooling time of the coolant on the lower mold, thus ensuring the cooling effect.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a cross-sectional view of the upper mold of this utility model.

[0025] Figure 3 This is an exploded view of the upper mold of this utility model.

[0026] Figure 4 This is a schematic diagram of the lower mold structure of this utility model.

[0027] Figure 5 These are schematic diagrams of the lower mold structure from different perspectives of this utility model.

[0028] Figure 6 This is a cross-sectional view of the lower mold of this utility model.

[0029] Labeling descriptions: Processing table 1, Support column 11, Top plate 12, Cylinder 13, Electric push rod 14, Fixed plate 141, Connecting plate 142, Mounting cover 143, First mounting block 144, Second mounting block 145, Mounting bracket 15, Upper mold 2, Upper cavity 21, Ejector pin 22, Linkage rod 23, Sliding plate 24, Sliding cavity 25, Sliding space 26, Elastic element 27, Through hole 28, Injection hole 29, Lower mold 3, Lower cavity 31, Placement groove 311, Push plate 312, Chamfer groove 32, Water inlet hole 33, Water outlet hole 34, Flow channel 35. Detailed Implementation

[0030] In the accompanying drawings of this specific embodiment and the disclosed embodiments, only the structures involved in the disclosed embodiments are involved. Other structures can be referred to with ordinary design. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of this utility model, they are protected by patent law.

[0031] like Figure 1-6 The mold shown is easy to demold, including a processing table 1. Support columns 11 are fixedly connected to the upper end of the processing table 1 at its four corners. A top plate 12 is fixedly connected to the upper end of the support columns 11. A lower mold 3 is provided on the upper surface of the processing table 1. An upper mold 2 is provided at the bottom of the top plate 12. A cylinder 13 is provided at the top of the top plate 12. The output shaft of the cylinder 13 passes through the top plate 12 and is connected to the top of the upper mold 2. An upper cavity 21 is opened on the side of the upper mold 2 opposite to the lower mold 3. Several ejector pins 22 are slidably provided at the bottom of the upper cavity 21. At least one linkage rod 23 is slidably provided on both sides of the opening of the upper cavity 21. A linkage structure is provided between the linkage rod 23 and the ejector pin 22, which can cause the top surface of the ejector pin 22 to be on the same horizontal plane as the bottom of the upper cavity 21 when the end of the linkage rod 23 abuts against the lower mold 3.

[0032] like Figure 2-3 The linkage structure shown includes a sliding plate 24 at the top of the linkage rods 23 on both sides, ejector pins 22 arranged sequentially on the sliding plate 24, a sliding cavity 25 for the sliding plate 24 to move longitudinally in the upper mold 2, a sliding space 26 for the linkage rods 23 to slide in the upper mold 2, and several sets of elastic elements 27 between the sliding cavity 25 and the sliding plate 24.

[0033] like Figure 2-4 The upper cavity 21 shown has a through hole 28 for the ejector pin 22 to pass through, and the through hole 28 is connected to the sliding cavity 25; the four sides of the upper mold 2 at the opening of the upper cavity 21 are chamfered, and the four sides of the top of the lower mold 3 are chamfered grooves 32 corresponding to the chamfer of the upper mold 2; the back of the upper mold 2 is provided with an injection hole 29.

[0034] like Figure 4-5 The lower mold 3 shown has a lower cavity 31, and the bottom of the lower cavity 31 has a placement groove 311. A push plate 312 is placed inside the placement groove 311. An electric push rod 14 is located at the bottom of the processing table 1. A fixing plate 141 is located at the output end of the electric push rod 14. The fixing plate 141 and the push plate 312 are connected by a connecting plate 142. Figure 5 The bottom of the processing table 1 shown is provided with a mounting bracket 15 for mounting an electric push rod 14. The outer wall of the electric push rod 14 is provided with two symmetrical mounting covers 143. A mounting hole for mounting the electric push rod 14 is formed between the mounting covers 143. Two first mounting blocks 144 are symmetrically provided on the opposite side of the mounting cover 143. A second mounting block 145 is provided on the other side of the mounting cover 143 for mounting with the mounting bracket 15.

[0035] like Figure 4 , 6 The lower mold 3 shown has a water inlet hole 33 on one side and a water outlet hole 34 on the other side. A flow channel 35 is provided between the water inlet hole 33 and the water outlet hole 34. The cross-section of the flow channel 35 is set in a curved "S" shape.

[0036] In use, compared with the prior art where the upper mold 2 lacks a demolding structure, this utility model, through the setting of the linkage rod 23, ensures that when the upper mold 2 and the lower mold 3 are in a separated state, both the linkage rod 23 and the ejector pin 22 are in a protruding state. When the cylinder 13 pushes the upper mold 2 closer to the lower mold 3 for mold closing, the linkage rod 23 abuts against and is compressed against the lower mold 3, causing the linkage rod 23 to move upward along the sliding space 26, and driving the sliding plate 24 to move upward along the sliding cavity 25, thereby causing the ejector pin 22 to move, so that the top surface of the ejector pin 22 is in contact with the upper mold. When the bottom of cavity 21 is on the same horizontal plane, the elastic element 27 is compressed. When the injection molding is completed and the mold is opened, the upper mold 2 moves upward, the force against the linkage rod 23 disappears, the elastic potential energy of the elastic element 27 is released, and the sliding plate 24, ejector pin 22 and linkage rod 23 are reset, so that the ejector pin 22 can push the molded product to separate from the upper cavity 21 and complete the demolding. When the upper mold 2 is demolded, the electric push rod 14 is activated to drive the push plate 312 to move upward, so that the product can be completely demolded and separated from the lower cavity 31.

Claims

1. A mold for easy demolding, comprising a processing table, characterized in that: The upper surface of the machining platform is fixedly connected to support columns at its four corners. A top plate is fixedly connected to the upper end of the support columns. A lower mold is provided on the upper surface of the machining platform. An upper mold is provided at the bottom of the top plate. A cylinder is provided at the top of the top plate. The output shaft of the cylinder passes through the top plate and is connected to the top of the upper mold. An upper cavity is opened on the side of the upper mold opposite to the lower mold. Several ejector pins are slidably provided at the bottom of the upper cavity. At least one linkage rod is slidably provided on both sides of the opening of the upper cavity. A linkage structure is provided between the linkage rod and the ejector pin, which can cause the top surface of the ejector pin to be on the same horizontal plane as the bottom of the upper cavity when the end of the linkage rod abuts against the lower mold.

2. The mold for easy demolding according to claim 1, characterized in that: The linkage structure includes sliding plates at the top of the linkage rods on both sides, and the ejector pins are arranged sequentially on the sliding plates. The upper mold has a sliding cavity for the longitudinal movement of the sliding plates, and the upper mold also has a sliding space for the linkage rods to slide. Several sets of elastic elements are provided between the sliding cavity and the sliding plate.

3. The mold for easy demolding according to claim 2, characterized in that: The upper cavity has a through hole at the bottom for the ejector pin to pass through, and the through hole is connected to the sliding cavity.

4. The mold for easy demolding according to claim 3, characterized in that: The upper mold has chamfered edges on all four sides at the opening of the upper cavity, and the lower mold has chamfered grooves on its top four sides corresponding to the chamfered edges of the upper mold.

5. A mold for easy demolding according to claim 4, characterized in that: The upper mold has injection holes on its back side.

6. A mold for easy demolding according to any one of claims 1-5, characterized in that: The lower mold has a lower cavity, the bottom of the lower cavity has a placement groove, the placement groove has a push plate, the bottom of the processing table has an electric push rod, the output end of the electric push rod has a fixing plate, and the fixing plate and the push plate are connected by a connecting plate.

7. A mold for easy demolding according to claim 6, characterized in that: The bottom of the processing table is provided with a mounting bracket for installing an electric push rod. The outer wall of the electric push rod is provided with two symmetrical mounting covers. The mounting covers form a mounting hole for installing the electric push rod. Two first mounting blocks are symmetrically provided on opposite sides of the mounting covers. A second mounting block for mounting with the mounting bracket is provided on the other side of the mounting cover.

8. A mold for easy demolding according to claim 7, characterized in that: The lower mold has a water inlet hole on one side and a water outlet hole on the other side. A flow channel is provided between the water inlet hole and the water outlet hole, and the cross-section of the flow channel is curved "S" shaped.

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