A mould structure for forming a profiled double-sided straight body with a release

Abstract

The utility model discloses a mould structure of special-shaped double -sided straight body demoulding, including front mould and back mould, front mould and back mould are used to install on die -casting machine bed, and be provided with feed port on the front mould, still include demoulding device and cooling device, the demoulding device includes locating post, thimble assembly and sliding sleeve, and locating post fixed mounting is on the front mould, and is used for with the interference fit of die casting, and sliding sleeve sliding installation is on the locating post, and die -casting machine bed is used for driving sliding sleeve to slide in the inside of front mould, the die casting has ladder face after forming, the end surface of sliding sleeve is used for with ladder face contact, and thimble assembly is used for to the die casting and carries out the auxiliary demoulding, the cooling device includes the circulating cold water channel of setting in the inside of locating post, the utility model discloses the purpose is to solve the mould demoulding structure among the prior art, when carrying out demoulding to work piece, and thimble impact arrives work piece, will leave the impact mark on work piece, and then leads to the work piece and appears the flaw, influences the problem of subsequent application.

Description

Technical Field

[0001] This utility model relates to the technical field of mold demolding structure, specifically to a mold structure for demolding irregular double-sided straight molds. Background Technology

[0002] Metal casting molds are a crucial step in the process of injecting and shaping molten metal. Liquid aluminum alloy is poured into the mold cavity using gravity-fed natural filling, and after solidification, a casting is formed.

[0003] Poor demolding effect, easy material jamming, resulting in uneven processing and low processing efficiency. In addition, the demolding is carried out by springs, which will fatigue after long-term use, resulting in weak ejection in the later stage. It also causes serious heat generation during long-term operation, poor safety, requires cooling, and slow processing speed.

[0004] Demolding products using mold ejector pins can result in demolding marks, and the demolding structure is prone to jamming and wear under thermal expansion and contraction conditions, leading to poor stability.

[0005] The invention patent with application number CN201911220798.X and publication number CN110884056A (hereinafter referred to as "Prior Art 1") discloses an injection mold and its demolding method, including a mold base, a lifting frame, a front mold, a rear mold, a drive mechanism, an ejection mechanism, a cooling mechanism, and a feed port. The rear mold is composed of two identical modules spliced ​​together. An ejection mechanism is provided in the center of the mold base. Slide rails are symmetrically arranged on both sides of the ejection mechanism. Modules are arranged in the slide rails through sliders. An ejection mechanism is also provided on each module. A cooling mechanism is embedded in each module. A drive mechanism is provided on one side of each module. A lifting frame is provided on the mold base. The front mold is mounted on the lifting frame. The front mold corresponds to the rear mold. A feed port is provided on the front mold.

[0006] The specification of prior art 1 discloses an injection mold and its demolding method. When in use, it can quickly cool down and demold efficiently, effectively ensuring demolding efficiency and quality, and improving product qualification rate and processing efficiency. However, in actual application, when demolding the workpiece, the ejector pin impacts the workpiece and leaves impact marks on the workpiece, resulting in defects in the production of the workpiece and affecting subsequent applications. Utility Model Content

[0007] This utility model provides a mold structure for demolding irregular double-sided straight body, which aims to solve the problem in the existing mold demolding structure where, when demolding the workpiece, the ejector pin impacts the workpiece, leaving impact marks, which in turn causes defects in the workpiece and affects subsequent applications.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] A mold structure for demolding irregular double-sided straight-body parts includes a front mold and a rear mold, which are mounted on a die-casting machine. The front mold has a feed port. It also includes a demolding device and a cooling device. The demolding device includes a positioning pin, an ejector pin assembly, and a sliding sleeve. The positioning pin is fixedly mounted on the front mold and is used for interference fit with the die-cast part. The sliding sleeve is slidably mounted on the positioning pin. The die-casting machine drives the sliding sleeve to slide inside the front mold. After molding, the die-cast part has a stepped surface. The end face of the sliding sleeve is used to contact the stepped surface. The ejector pin assembly is used to assist in demolding the die-cast part. The cooling device includes a circulating cold water channel inside the positioning pin, which circulates and discharges cooling liquid.

[0010] The front mold is also equipped with a lubrication device, which is used to introduce grease into the gap between the sliding sleeve and the positioning pin.

[0011] Furthermore, the mold structure also includes a forming device, which includes a rear mold seat disposed on the rear mold and a front mold seat disposed on the front mold. The front mold seat is used to fasten onto the rear mold seat and form a die-casting cavity with the positioning post and the rear mold seat. The die-casting cavity is used to connect and communicate with the feed port. The positioning post is also fixedly connected to the front mold.

[0012] Furthermore, a sliding area is provided on the front mold, and a clamping block is slidably disposed inside the sliding area, the clamping block being used to fix the sliding sleeve.

[0013] Furthermore, the clamping block includes an upper clamping block and a lower clamping block. The lower clamping block is provided with a stepped groove. The end of the sliding sleeve is provided with an installation ring. The installation ring is used to install inside the stepped groove. The upper clamping block and the lower clamping block are fixed together by bolts.

[0014] Furthermore, the demolding device has two parts, and the number and position of the cooling device and the molding device correspond to the number and position of the demolding device. The two die-casting cavities are interconnected, and the end of the ejector pin assembly is used to connect with the two sides of the two die-cast parts.

[0015] Furthermore, the ejector assembly includes several ejector bodies disposed on the front mold. The die-casting machine tool is used to drive the ejector bodies to slide inside the front mold. The ends of the ejector bodies are used to contact the two ends and the middle of the die-cast part after molding.

[0016] Furthermore, a die-casting channel is provided on the front mold base, with both ends of the die-casting channel connected to the feed port and the die-casting cavity, respectively.

[0017] Furthermore, the circulating cold water channel has a U-shaped structure, with both ends connected to the outside. One end is connected to the cold water source via a water pump, and the other end is connected to the cold water pool.

[0018] Furthermore, the lubrication device includes a lubrication channel and an injection nozzle. The injection nozzle is located at the end of the front mold, and the lubrication channel is located inside the front mold. One end of the lubrication channel is connected to the injection nozzle, and the other end is connected to the stepped groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This utility model mainly includes a front mold and a rear mold. In actual use, the operator first uses a die-casting machine to control the front mold to press down, so that the front mold and the rear mold interlock. Then, through a lubrication device, grease is introduced into the gap between the sliding sleeve and the positioning pin. Next, a high-temperature zinc alloy solution is added to the feed inlet. The high-temperature zinc alloy solution enters the feed inlet and finally flows into the rear mold for cooling and forming. At this time, the positioning pin contacts the high-temperature zinc alloy solution. Simultaneously, coolant is introduced into the circulating cooling water channel, allowing the coolant to flow in the circulating cooling water channel. After the workpiece cools, the die-casting machine controls the front mold to rise and open the mold. Due to the contact with the positioning pin, the die-cast part adheres to the positioning pin. Then, the die-casting machine drives the sliding sleeve and ejector pin assembly... The sliding mechanism in the front mold causes the sliding sleeve to impact the stepped surface of the die-casting part, while the ejector pin assembly impacts the burrs on the edge of the die-casting part. Finally, the demolded die-casting part is collected. The advantages of this design are that the circulating coolant in the cooling water channel reduces the expansion of the locating pins after heating, preventing the sliding sleeve from getting stuck on the locating pins. Cooling with coolant effectively prevents this from happening. Furthermore, because the end face of the sliding sleeve is a smooth flat structure, no impact marks will appear when the sliding sleeve impacts the stepped surface of the workpiece during demolding, effectively protecting the production quality of the workpiece. In addition, the lubrication device introduces grease between the locating pins and the sliding sleeve, which reduces the friction between the sliding sleeve and the locating pins, allowing the sliding sleeve to demold the die-casting part more effectively. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the usage state of this utility model.

[0024] Figure 3This utility model Figure 1 A magnified view of a portion of point A in the middle.

[0025] In the diagram, 101-front mold, 102-rear mold, 103-feed inlet, 104-locating pin, 105-sliding sleeve, 106-stepped surface, 107-circulating cooling water channel, 108-rear mold base, 109-front mold base, 110-die casting cavity, 111-sliding area, 112-upper clamping block, 113-lower clamping block, 114-stepped groove, 115-mounting ring, 116-ejector body, 117-die casting channel, 118-lubrication channel, 119-injection nozzle. Detailed Implementation

[0026] The present invention will be further described below with reference to embodiments. These embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0027] Please see Figures 1-3 As shown, this embodiment discloses a mold structure for demolding a non-standard double-sided straight body, including a front mold 101 and a rear mold 102. The front mold 101 and the rear mold 102 are used to be mounted on a die-casting machine tool. The front mold 101 is provided with a feed port 103. It also includes a demolding device and a cooling device. The demolding device includes a positioning pin 104, an ejector pin assembly, and a sliding sleeve 105. The positioning pin 104 is fixedly mounted on the front mold 101 and is used to have an interference fit with the die-casting part. The sliding sleeve 105 is slidably mounted on the positioning pin 104. The die-casting machine tool is used to drive the sliding sleeve 105 to slide inside the front mold 101. After the die-casting part is formed, it has a stepped surface 106. The end face of the sliding sleeve 105 is used to contact the stepped surface 106. The ejector pin assembly is used to assist in demolding the die-casting part. The cooling device includes a circulating cold water channel 107 disposed inside the positioning pin 104. The circulating cold water channel 107 is used for circulating injection and discharge of cooling liquid.

[0028] The front mold 101 is also equipped with a lubrication device, which is used to introduce grease into the gap between the sliding sleeve 105 and the positioning post 104.

[0029] This utility model mainly includes a front mold 101 and a rear mold 102. In actual use, the operator first uses a die-casting machine to control the front mold 101 to press down, so that the front mold 101 and the rear mold 102 are interlocked. Then, through a lubrication device, grease is introduced into the gap between the sliding sleeve 105 and the positioning pin 104. Then, a high-temperature zinc alloy solution is added to the feed port 103. The high-temperature zinc alloy solution enters the feed port 103 and finally flows into the rear mold 102 for cooling and forming. At this time, the positioning pin 104 is in contact with the high-temperature zinc alloy solution. At the same time, coolant is introduced into the circulating cold water channel 107, so that the coolant flows in the circulating cold water channel 107. After the workpiece is cooled, the front mold 101 is controlled to rise by the die-casting machine to open the mold. Due to the contact with the positioning pin 104, the die-cast part is attached to the positioning pin 104. Then, the die-casting machine is driven to drive the sliding sleeve 105 and the ejector pin assembly. The sliding sleeve 105 impacts the stepped surface 106 of the die-casting part in the front mold 101, and the ejector pin assembly impacts the burrs on the edge of the die-casting part. Finally, the die-casting part that has been demolded is collected. The advantage of this setting is that the circulation of coolant in the circulating cooling water channel 107 reduces the expansion of the positioning pin 104 after heating, and prevents the sliding sleeve 105 from getting stuck on the positioning pin 104. Cooling by the coolant can effectively prevent this situation from happening. Furthermore, when the sliding sleeve 105 demolds, since the end face of the sliding sleeve 105 is a smooth planar structure, no impact marks will appear when the sliding sleeve 105 impacts the stepped surface 106 of the workpiece, effectively protecting the production quality of the workpiece. In addition, by introducing grease between the positioning pin 104 and the sliding sleeve 105 through the lubrication device, the friction between the sliding sleeve 105 and the positioning pin 104 can be reduced, allowing the sliding sleeve 105 to demold the die-casting part better.

[0030] In some embodiments, the mold structure further includes a molding device, which includes a rear mold base 108 disposed on the rear mold 102 and a front mold base 109 disposed on the front mold 101. The front mold base 109 is used to fasten onto the rear mold base 108 and form a die-casting cavity 110 with the positioning post 104 and the rear mold base 108. The die-casting cavity 110 is used to connect and communicate with the feed port 103. The positioning post 104 is also fixedly connected to the front mold 101.

[0031] In actual use, after the front mold base 109 and the rear mold base 108 are engaged with each other, the bottom surface of the rear mold base 108, the top surface of the front mold base 109, and the positioning post 104 form a die casting area. The die casting area is the shape of the die casting part that needs to be die cast. The high-temperature zinc alloy solution enters the die casting cavity 110 through the feed port 103 and forms the final die casting part after cooling.

[0032] In some embodiments, a sliding area 111 is provided on the front mold 101, and a clamping block is slidably disposed inside the sliding area 111 for fixing the sliding sleeve 105.

[0033] In actual use, the purpose of setting the sliding area 111 is to facilitate the sliding of the clamping block and the sliding sleeve 105 within the sliding area 111.

[0034] In some embodiments, the clamping block includes an upper clamping block 112 and a lower clamping block 113. The lower clamping block 113 is provided with a stepped groove 114. The end of the sliding sleeve 105 is provided with a mounting ring 115. The mounting ring 115 is used to be installed inside the stepped groove 114. The upper clamping block 112 and the lower clamping block 113 are fixed together by bolts.

[0035] In actual use, the cross-section of the sliding sleeve 105 is the same as the cross-section of the stepped groove 114. During installation, the sliding sleeve 105 is first installed between the upper clamping block 112 and the lower clamping block 113 to finally fix the sliding sleeve 105. After the upper clamping block 112 is connected to the die-casting machine tool, the die-casting machine tool controls the entire clamping block to slide inside the sliding area 111.

[0036] In some embodiments, there are two demolding devices, and the number and position of cooling devices and molding devices correspond to the number and position of demolding devices. The two die-casting cavities 110 are interconnected, and the ends of the ejector pin assembly are used to connect with the two sides of the two die-cast parts.

[0037] In actual use, the mold structure disclosed in this utility model is a mold for demolding two workpieces. Therefore, two demolding devices are set up, corresponding to two die-casting cavities 110. The two die-casting cavities 110 are interconnected, which can improve the die-casting efficiency. After the die-casting is formed, the two die-castings are interconnected, which facilitates the ejector pin assembly and the sliding sleeve 105 to demold the two workpieces as a whole.

[0038] In some embodiments, the ejector assembly includes a plurality of ejector bodies 116 disposed on the front mold 101. The die casting machine tool is used to drive the ejector bodies 116 to slide inside the front mold 101. The ends of the ejector bodies 116 are used to contact the two ends and the middle of the die-cast part after molding.

[0039] In actual use, the ejector pin body 116 is slidably mounted on the front mold 101. When in use, the position of the bottom surface of the ejector pin corresponds to the position of the edge burr of the die-cast part after molding and the position of the connection between the two die-cast parts. When demolding, the ejector pin body 116 and the sliding sleeve 105 demold the die-cast part together, so that the demolding effect of the die-cast part is more rigid and better.

[0040] In some embodiments, a die-casting channel 117 is provided on the front mold base 109, and the two ends of the die-casting channel 117 are respectively connected to the feed port 103 and the die-casting cavity 110.

[0041] In actual use, the upper end of the die casting channel 117 is sealed to the die casting nozzle, and the lower end is connected to the die casting cavity 110 on the rear mold base 108. When the high-temperature zinc alloy solution enters the feed port 103, it enters the die casting cavity 110 through the die casting channel 117.

[0042] In some embodiments, the circulating cold water channel 107 has a U-shaped structure, with both ends of the circulating cold water channel 107 connected to the outside. One end is connected to a cold water source via a water pump, and the other end is connected to a cold water pool.

[0043] In actual use, the U-shaped circulating cooling water channel 107 has water entering and exiting at both ends, ensuring the flow of coolant inside the circulating cooling water channel 107 to achieve the purpose of circulating cooling.

[0044] In some embodiments, the lubrication device includes a lubrication channel 118 and an injection nozzle 119. The injection nozzle 119 is disposed at the end of the front mold 101, and the lubrication channel 118 is disposed inside the front mold 101. One end of the lubrication channel 118 is connected to the injection nozzle 119, and the other end is connected to the stepped groove 114.

[0045] In actual use, the staff regularly injects lubrication into the gap between the sliding sleeve 105 and the positioning post 104 through the injection nozzle 119 into the lubrication channel 118, thereby completing the lubrication between the sliding sleeve 105 and the positioning post 104.

[0046] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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 utility model.

[0047] Furthermore, the terms “first,” “second,” “third,” and “fourth” 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. Thus, a feature defined as “first,” “second,” “third,” or “fourth” may explicitly or implicitly include at least one of those features.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," 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. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold structure for demolding irregular double-sided straight-body die, comprising a front mold and a rear mold, the front mold and the rear mold being mounted on a die-casting machine tool, the front mold being provided with a feed inlet, characterized in that, Also includes: The demolding device includes a positioning pin, an ejector pin assembly, and a sliding sleeve. The positioning pin is fixedly installed on the front mold and is used to have an interference fit with the die-casting part. The sliding sleeve is slidably installed on the positioning pin. The die-casting machine tool is used to drive the sliding sleeve to slide inside the front mold. After the die-casting part is formed, it has a stepped surface. The end face of the sliding sleeve is used to contact the stepped surface. The ejector pin assembly is used to assist in demolding the die-casting part. A cooling device, comprising a circulating cold water channel disposed inside a positioning column, wherein the circulating cold water channel is used for circulating injection and discharge of cooling liquid; The front mold is also equipped with a lubrication device, which is used to introduce grease into the gap between the sliding sleeve and the positioning pin.

2. The mold structure for demolding irregular double-sided straight body according to claim 1, characterized in that: The mold structure also includes a forming device, which includes a rear mold seat on the rear mold and a front mold seat on the front mold. The front mold seat is used to fasten onto the rear mold seat and form a die-casting cavity with the positioning post and the rear mold seat. The die-casting cavity is used to connect and communicate with the feed port. The positioning post is also fixedly connected to the front mold.

3. The mold structure for demolding irregular double-sided straight body according to claim 2, characterized in that: A sliding area is provided on the front mold, and a clamping block is slidably disposed inside the sliding area. The clamping block is used to fix the sliding sleeve.

4. The mold structure for demolding irregular double-sided straight body according to claim 3, characterized in that: The clamping block includes an upper clamping block and a lower clamping block. The lower clamping block is provided with a stepped groove. The end of the sliding sleeve is provided with a mounting ring. The mounting ring is used to install inside the stepped groove. The upper clamping block and the lower clamping block are fixed together by bolts.

5. The mold structure for demolding irregular double-sided straight body according to claim 1, characterized in that: The demolding device has two parts, and the number and position of the cooling device and the forming device correspond to the number and position of the demolding device. The two die-casting cavities are interconnected, and the end of the ejector pin assembly is used to connect with the two sides of the two die-cast parts.

6. The mold structure for demolding irregular double-sided straight body according to claim 5, characterized in that: The ejector assembly includes several ejector bodies disposed on the front mold. The die-casting machine tool is used to drive the ejector bodies to slide inside the front mold. The ends of the ejector bodies are used to contact the two ends and the middle of the die-cast part after molding.

7. The mold structure for demolding irregular double-sided straight body according to claim 2, characterized in that: The front mold base is equipped with a die-casting channel, and the two ends of the die-casting channel are connected to the feed port and the die-casting cavity, respectively.

8. The mold structure for demolding irregular double-sided straight body according to claim 1, characterized in that: The circulating cold water channel has a U-shaped structure, with both ends connected to the outside. One end is connected to the cold water source via a water pump, and the other end is connected to the cold water pool.

9. The mold structure for demolding irregular double-sided straight body according to claim 4, characterized in that: The lubrication device includes a lubrication channel and an injection nozzle. The injection nozzle is located at the end of the front mold, and the lubrication channel is located inside the front mold. One end of the lubrication channel is connected to the injection nozzle, and the other end is connected to the stepped groove.

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