Injection mold capable of preventing mold from being not fully filled

Abstract

The invention relates to the technical field of mold injection molding, and particularly discloses an injection mold for preventing insufficient filling of a mold, the injection mold comprises a male mold and a female mold, the male mold is arranged at the upper end of the female mold, the male mold and the female mold are matched with each other, the injection mold also comprises a plurality of groups of detection mechanisms, and the plurality of groups of detection mechanisms are respectively embedded in the male mold; each group of detection mechanism comprises a detection cylinder, a detection column, a pressure sensor and a spring, the detection cylinder is embedded in the male mold, the detection column is in sliding connection with the detection cylinder, the pressure sensor is fixedly connected with the detection cylinder and is embedded in the detection cylinder, the output end of the pressure sensor is matched with the detection column, and the spring is embedded in the detection cylinder. Whether the whole cavity is filled with injection molding materials or not is judged according to pressure detection of multiple point positions, real-time detection can be conducted on injection molding, the machining efficiency is improved, meanwhile, unqualified products can be quickly known, and the injection molding machining flexibility is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mold injection, and in particular to an injection mold for preventing the mold from being insufficiently filled. Background Art

[0002] At present, injection molds are a tool for producing plastic products, and are also tools that give plastic products complete structures and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by an injection molding machine, and after cooling and solidification, a molded product is obtained. During the mold injection process, holes formed by bubbles will appear on the surface of the finished plastic products, especially in the corners of the mold and where the plastic is thicker. This is generally because the plastic is filled too quickly, and the air has no time to be discharged and is covered by the plastic, resulting in bubbles on the surface of the finished product. In addition, there are impurities and moisture remaining in the mold, which will also cause the plastic to be incompletely filled during the injection molding process.

[0003] The prior art CN107672126A provides an injection mold for preventing the mold from being insufficiently filled. The mold is safe and convenient to use. A high-pressure air nozzle is arranged on the mold. Before each injection molding, the nozzle is used to clean the inside of the mold to remove the residual impurities and water vapor in the mold, so that no impurities and bubbles will appear when the plastic is filled. A plurality of plastic guide grooves are arranged on the inner surface of the mold model. During injection molding, the melted plastic will flow along the guide grooves instead of flowing in a disorderly manner as before. The speed at which the plastic fills the model can be accelerated, and the air in the model can be squeezed out. Air guide pipes are arranged at the corners of the model to discharge all the air in some dead corners, so that the plastic is fully filled without leaving any gaps, and the surface of the product quality produced is smooth without bubbles.

[0004] However, in the prior art, there is a lack of detection of the mold during the injection molding process, and it is impossible to ensure whether the mold is fully filled during the injection molding process. Summary of the invention

[0005] The object of the present invention is to provide an injection mold that prevents the mold from being insufficiently filled, aiming to solve the technical problem in the prior art of lack of detection of the mold during the injection molding process and inability to ensure whether the mold is fully filled during the injection molding process.

[0006] To achieve the above-mentioned purpose, the present invention adopts an injection mold for preventing the mold from being insufficiently filled, including a male mold and a female mold, wherein the male mold is arranged at the upper end of the female mold, and the male mold and the female mold are adapted to each other, and also includes multiple groups of detection mechanisms, and the multiple groups of detection mechanisms are respectively embedded in the interior of the male mold; each group of the detection mechanisms includes a detection cylinder, a detection column, a pressure sensor and a spring, the detection cylinder is embedded in the interior of the male mold, and the detection cylinder and the male mold are adapted to each other, the detection column is slidably connected to the detection cylinder and embedded in the interior of the detection cylinder, the pressure sensor is fixedly connected to the detection cylinder and embedded in the interior of the detection cylinder, and the output end of the pressure sensor is adapted to the detection column, and the spring is embedded in the interior of the detection cylinder and located between the detection cylinder and the detection column.

[0007] Among them, the detection cylinder includes a detection base plate, a cylinder column, a first bolt column and a second bolt column. The cylinder column is arranged at the lower end of the detection base plate. The number of the first bolt column and the second bolt column are respectively multiple. The multiple first bolt columns respectively penetrate the detection base plate and are threadedly connected to the cylinder column. The multiple groups of the second bolt columns respectively penetrate the detection base plate and are threadedly connected to the male mold.

[0008] The detection base plate includes a plate body and a limiting boss, the limiting boss is fixedly connected to the plate body and is located on one side of the plate body, and the plate body and the limiting boss respectively have a plurality of heat dissipation through holes.

[0009] Among them, the cylinder includes an outer cylinder and an oil sealing ring, the oil sealing ring is embedded in the inner side of the outer cylinder, and the oil sealing ring and the outer cylinder are adapted to each other, the outer cylinder has multiple groups of oil filling holes, and the multiple groups of oil filling holes are evenly arranged on the outer wall of the outer cylinder.

[0010] The outer cylinder further has a first spiral groove, which is evenly arranged on the inner wall of the outer cylinder, and both sides of the first spiral groove are chamfered.

[0011] The detection column includes a column, a mounting platform and an ejector pin, wherein the mounting platform is fixedly connected to the column and located at one end of the column, and the ejector pin is fixedly connected to the mounting platform and located at one side of the mounting platform.

[0012] The column has a second spiral groove, and the second spiral groove is evenly arranged on the outer wall of the column, and two sides of the second spiral groove are chamfered.

[0013] The present invention provides an injection mold for preventing insufficient filling of a mold. The plurality of detection mechanisms are installed in the male mold. The male mold is matched with the female mold, and the male mold covers the female mold. During injection molding, injection plastic is injected into the injection port of the female mold. The injection plastic quickly fills the cavity formed by the male mold and the female mold. After the injection plastic fills the entire cavity, the detection column is squeezed and pushed to slide inside the detection cylinder. The end of the detection column squeezes the spring. At the same time, the end of the detection column contacts and squeezes the detection end of the pressure sensor. The pressure detected by the pressure sensor is transmitted in real time. The pressure sensor is input to the backend, and when the detected pressure reaches the preset pressure value of the corresponding workpiece, it means that the current area of ​​the surface is fully filled. When each of the pressure sensors reaches the preset pressure value, it indicates that the injection molding has been fully filled. After cooling, demolding can be performed. After demolding, the detection column is reset under the elastic force of the spring, and the detection cylinder can be disassembled for replacement and maintenance. The above structure can perform trigger pressure detection on multiple positions of the cavity, and judge whether the injection plastic fills the entire cavity based on the pressure detection of multiple points. The injection molding can be detected in real time, which improves the processing efficiency and quickly knows the unqualified products, thereby improving the flexibility of injection molding processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 The invention is a schematic structural diagram of an injection mold for preventing insufficient filling of the mold.

[0016] Figure 2 It is a structural cross-sectional view of an injection mold for preventing insufficient filling of the mold according to the present invention.

[0017] Figure 3 It is a partial structural sectional view of an injection mold for preventing insufficient filling of the mold according to the present invention.

[0018] Figure 4 It is a cross-sectional view of the internal structure of the detection mechanism of the present invention.

[0019] Figure 5 It is a cross-sectional view of the internal structure of the outer cylinder of the present invention.

[0020] Figure 6 It is a structural cross-sectional view of the column of the present invention.

[0021] 101-male mold, 102-female mold, 103-pressure sensor, 104-spring, 105-first bolt column, 106-second bolt column, 107-plate body, 108-limiting boss, 109-heat dissipation hole, 110-outer cylinder, 111-oil sealing ring, 112-oil filling hole, 113-first spiral groove, 114-column, 115-mounting table, 116-thrust pin, 117-second spiral groove, 118-cooling base, 119-cooling fins, 120-cooling sleeve, 121-cooling fan body, 122-silicone strip. DETAILED DESCRIPTION

[0022] See also Figures 1 to 6 The present invention provides an injection mold for preventing insufficient filling of a mold, comprising a male mold 101 and a female mold 102, wherein the male mold 101 is arranged at the upper end of the female mold 102, and the male mold 101 and the female mold 102 are adapted to each other, and further comprising a plurality of detection mechanisms, wherein the plurality of detection mechanisms are respectively embedded in the interior of the male mold 101; each group of the detection mechanisms comprises a detection cylinder, a detection column, a pressure sensor 103 and a spring 104, wherein the detection cylinder is embedded in the interior of the male mold 101, and the detection cylinder and the male mold 101 are adapted to each other, the detection column is slidably connected to the detection cylinder and embedded in the interior of the detection cylinder, the pressure sensor 103 is fixedly connected to the detection cylinder and embedded in the interior of the detection cylinder, and the output end of the pressure sensor 103 is adapted to the detection column, and the spring 104 is embedded in the interior of the detection cylinder and located between the detection cylinder and the detection column.

[0023] In this embodiment, multiple groups of the detection mechanisms are installed in the male mold 101, the male mold 101 is adapted to the female mold 102, and the male mold 101 covers the female mold 102. During injection molding, injection plastic is injected into the injection port of the female mold 102, and the injection plastic quickly fills the cavity formed by the male mold 101 and the female mold 102. After the injection plastic fills the entire cavity, the detection column is squeezed and pushed, so that the detection column slides inside the detection cylinder, so that the end of the detection column is pressed against the spring 104. The mold is extruded, and at the same time, the end of the detection column contacts and squeezes the detection end of the pressure sensor 103. The pressure detected by the pressure sensor 103 is transmitted to the background in real time. When the detected pressure reaches the preset pressure value of the corresponding workpiece, the current area of ​​the surface is fully filled. When each of the pressure sensors 103 reaches the preset pressure value, it indicates that the injection molding has been fully filled, and demolding can be performed after cooling. After demolding, the detection column is reset under the elastic force of the spring 104, and the detection cylinder can be disassembled for replacement and maintenance.

[0024] Furthermore, the detection cylinder includes a detection base plate, a cylinder column, a first bolt column 105 and a second bolt column 106, the cylinder column is arranged at the lower end of the detection base plate, the number of the first bolt column 105 and the second bolt column 106 are respectively multiple, multiple first bolt columns 105 respectively penetrate the detection base plate and are threadedly connected to the cylinder column, and multiple groups of second bolt columns 106 respectively penetrate the detection base plate and are threadedly connected to the public mold 101.

[0025] In this embodiment, the detection base plate and the cylinder are connected and fixed by the first bolt column 105, the cylinder column and the detection base plate are respectively embedded in the inside of the public mold 101, and then a plurality of sets of the second bolt columns 106 are used to fix the detection base plate and the cylinder column.

[0026] Furthermore, the detection base plate includes a plate body 107 and a limiting boss 108 , wherein the limiting boss 108 is fixedly connected to the plate body 107 and is located on one side of the plate body 107 , and the plate body 107 and the limiting boss 108 respectively have a plurality of heat dissipation holes 109 .

[0027] In this embodiment, the plate body 107 is used to disassemble and install the detection base plate onto the male mold 101, and to install and fix the limiting boss 108. At the same time, the limiting boss 108 limits one end of the spring 104, which can prevent the end of the spring 104 from moving randomly inside the detection cylinder during the extrusion and compression process to affect the detection data of the pressure sensor 103.

[0028] Furthermore, the cylinder includes an outer cylinder 110 and an oil sealing ring 111, the oil sealing ring 111 is embedded in the inner side of the outer cylinder 110, and the oil sealing ring 111 and the outer cylinder 110 are adapted to each other, and the outer cylinder 110 has multiple groups of oil filling holes 112, and the multiple groups of oil filling holes 112 are evenly arranged on the outer wall of the outer cylinder 110.

[0029] In this embodiment, lubricating oil is added between the outer cylinder 110 and the detection column through the oil filling hole 112 to lubricate the outer cylinder 110 and the detection column, thereby reducing the friction between the outer cylinder 110 and the detection column. At the same time, the sealing oil ring can prevent excess lubricating oil from overflowing.

[0030] Furthermore, the outer cylinder 110 further has a first spiral groove 113 , and the first spiral groove 113 is evenly arranged on the inner wall of the outer cylinder 110 , and two sides of the first spiral groove 113 are chamfered.

[0031] In this embodiment, after the lubricating oil enters between the detection column and the outer cylinder 110 through the oil filling hole 112, the detection column continuously expands and contracts inside the outer cylinder 110, and the lubricating oil is evenly applied to the entire inner wall of the outer cylinder 110 along the first spiral groove 113, and is also evenly applied to the entire outer wall of the detection column.

[0032] Furthermore, the detection column includes a column 114 , a mounting platform 115 and a ejector pin 116 , wherein the mounting platform 115 is fixedly connected to the column 114 and is located at one end of the column 114 , and the ejector pin 116 is fixedly connected to the mounting platform 115 and is located at one side of the mounting platform 115 .

[0033] In this embodiment, one end of the ejector pin 116 is mounted to one end of the column 114 through the mounting platform 115. The column 114 is pushed by the extrusion of the injection molding material, so that the column 114 is telescopically moved inside the outer cylinder 110, pushing the mounting platform 115 and the ejector pin 116. The mounting platform 115 limits the other end of the spring 104. At the same time, one end of the ejector pin 116 approaches the detection end of the pressure sensor 103 until it contacts, and finally squeezes the pressure sensor 103. The pressure sensor 103 detects the pressure applied by the ejector pin 116 in real time.

[0034] Furthermore, the column 114 has a second spiral groove 117 , and the second spiral groove 117 is evenly arranged on the outer wall of the column 114 , and two sides of the second spiral groove 117 are chamfered.

[0035] In this embodiment, the second spiral groove 117 guides and diverts the lubricating oil, and the second spiral groove 117 and the first spiral groove 113 have opposite spiral directions, which can improve the flow efficiency of the lubricating oil between the column 114 and the outer cylinder 110, make the friction between the column 114 and the outer cylinder 110 smaller, and reduce the wear of the column 114 and the outer cylinder 110.

[0036] Furthermore, the injection mold for preventing insufficient filling of the mold further comprises a cooling unit, and the cooling unit is fixedly connected to the detection cylinder and is located at the upper end of the detection cylinder.

[0037] In this embodiment, the cooling unit cools the detection mechanism to avoid a decrease in the detection accuracy of the pressure sensor 103 due to an overly high temperature inside the detection mechanism, and can also effectively extend the service life of the pressure sensor 103.

[0038] Furthermore, the cooling unit includes a cooling base 118, cooling fins 119, a cooling sleeve 120 and a cooling fan body 121. The cooling base 118 is fixedly connected to the detection cylinder and is located at the upper end of the detection cylinder. The cooling fins 119 are provided in multiple groups. Each group of cooling fins 119 is respectively fixedly connected to the cooling base 118 and is respectively located at the upper end of the cooling base 118. The cooling sleeve 120 is threadedly connected to the cooling base 118 and is sleeved on the outer wall of the cooling base 118. The cooling fan body 121 is fixedly connected to the cooling sleeve 120 and is embedded in the interior of the cooling sleeve 120.

[0039] In this embodiment, the cooling base 118 installs and fixes the cooling fins 119. The cooling fins 119 can increase the heat fan area and improve the heat exchange efficiency. The cooling sleeve 120 is installed on the cooling base 118, and the cooling sleeve 120 is tightened so that the cooling fan body 121 is located at the upper end of multiple groups of cooling fins 119. The cooling fan body 121 is started to rotate, so as to quickly cool down the multiple groups of cooling fins 119, and at the same time, the interior of the outer tube 110 is cooled by air to avoid the detection accuracy of the pressure sensor 103 being reduced due to the excessively high temperature inside the detection mechanism, and at the same time, the service life of the pressure sensor 103 can be effectively extended.

[0040] Furthermore, the cooling unit further includes a plurality of groups of silicone strips 122 . Each group of silicone strips 122 is fixedly connected to the cooling sleeve 120 and is located on the outer wall of the cooling sleeve 120 .

[0041] In this embodiment, a plurality of groups of the silicone strips 122 are evenly arranged on the outer wall of the cooling sleeve 120 , which can increase the friction between the hand and the cooling sleeve 120 when tightening and loosening the cooling sleeve 120 , thereby achieving an effective anti-slip effect.

[0042] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. An injection mold for preventing insufficient filling of a mold, comprising a male mold and a female mold, wherein the male mold is arranged at the upper end of the female mold, and the male mold and the female mold are adapted to each other, characterized in that: It also includes a plurality of detection mechanisms, wherein the plurality of detection mechanisms are respectively embedded in the interior of the male mold; Each group of the detection mechanism includes a detection cylinder, a detection column, a pressure sensor and a spring. The detection cylinder is embedded in the male mold, and the detection cylinder and the male mold are adapted to each other. The detection column is slidably connected to the detection cylinder and embedded in the detection cylinder. The pressure sensor is fixedly connected to the detection cylinder and embedded in the detection cylinder, and the output end of the pressure sensor is adapted to the detection column. The spring is embedded in the detection cylinder and is located between the detection cylinder and the detection column.

2. An injection mold for preventing insufficient mold filling according to claim 1, characterized in that: The detection cylinder includes a detection base plate, a cylinder column, a first bolt column and a second bolt column. The cylinder column is arranged at the lower end of the detection base plate. The first bolt column and the second bolt column are respectively multiple in number. The multiple first bolt columns respectively penetrate the detection base plate and are threadedly connected to the cylinder column. The multiple groups of the second bolt columns respectively penetrate the detection base plate and are threadedly connected to the male mold.

3. An injection mold for preventing insufficient mold filling according to claim 2, characterized in that: The detection base plate includes a plate body and a limiting convex column, wherein the limiting convex column is fixedly connected to the plate body and is located at one side of the plate body, and the plate body and the limiting convex column respectively have a plurality of heat dissipation through holes.

4. An injection mold for preventing insufficient mold filling as claimed in claim 2, characterized in that: The cylinder includes an outer cylinder and an oil sealing ring, wherein the oil sealing ring is embedded in the inner side of the outer cylinder and the oil sealing ring and the outer cylinder are adapted to each other, and the outer cylinder has a plurality of groups of oil injection holes, which are evenly arranged on the outer wall of the outer cylinder.

5. An injection mold for preventing insufficient mold filling according to claim 4, characterized in that: The outer cylinder also has a first spiral groove, which is evenly arranged on the inner wall of the outer cylinder, and both sides of the first spiral groove are chamfered.

6. An injection mold for preventing insufficient mold filling according to claim 1, characterized in that: The detection column comprises a column, a mounting platform and an ejector pin. The mounting platform is fixedly connected to the column and located at one end of the column. The ejector pin is fixedly connected to the mounting platform and located at one side of the mounting platform.

7. An injection mold for preventing insufficient mold filling according to claim 6, characterized in that: The column has a second spiral groove, and the second spiral groove is evenly arranged on the outer wall of the column, and two sides of the second spiral groove are respectively chamfered.

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