Embedded PIN type injection molding device with multiple sliding blocks for preventing oil cylinder from retreating

Abstract

The invention relates to the technical field of injection molding, in particular to a PIN-embedded injection molding device with multiple sliding blocks for preventing an oil cylinder from retreating, comprising: a fixed mold, the lower end of the fixed mold is attached to a movable mold, and the left and right end surfaces of the fixed mold are both recessed inwards to form two mounting grooves; the two female mold cores are symmetrically embedded in the lower end of the fixed mold; the two male mold cores are symmetrically embedded in the upper end of the movable mold; the left end and the right end of the male mold core are connected with the pushing pieces in a sliding manner; the four second oil cylinders are respectively mounted in the four mounting grooves; the four first shifting blocks are installed at the lower ends of the movable parts of the four second oil cylinders correspondingly, and the cross section of each first shifting block is in a trapezoid shape with the lower portion narrower than the upper portion; by means of the design, the sliding block is prevented from retreating, the probability that the sliding block retreats due to injection molding pressure factors formed during plastic molding is effectively reduced, the probability that defective injection molding products occur is effectively reduced, and the injection molding effect and quality are effectively guaranteed.

Description

Technical Field

[0001] The invention relates to a buried PIN type injection molding device with multiple slide blocks for preventing an oil cylinder from retreating, and belongs to the technical field of injection molding. Background Art

[0002] Injection molding is a manufacturing process widely used to create the shapes of industrial products. It primarily includes rubber and plastic injection molding. Depending on the molding method, the injection molding process can be further divided into compression molding and die casting. Injection molding machines, as core equipment, efficiently produce a variety of plastic products using thermoplastic or thermosetting materials through matching plastic molding molds. This process offers significant advantages, including high production speed, high efficiency, and ease of automation.

[0003] Embedded PIN injection molds are a special type of injection mold. To ensure the precise embedding of metal PINs, a dedicated positioning master mold is usually designed on the mold. When in use, the fisheye portion of the metal PIN must first be accurately placed in the positioning master mold before the mold closing and injection molding operation is performed. Due to product structural requirements, some embedded PIN injection molds require complex shapes such as grooves to be molded on the side of the injection position. For this purpose, a driver is installed on the side of the mold, and a molding slider is configured that extends into the molding cavity and is connected to the movable part of the driver. However, the existing design has obvious defects: the driver can only provide power during the movement phase. When the plastic material is injected into the mold, the molding slider will be subjected to strong injection pressure and is prone to backward displacement. This phenomenon greatly increases the probability of defective products and seriously affects the molding effect and quality stability of injection molded products. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a buried PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A PIN-type injection molding device with multiple slides to prevent the oil cylinder from retreating, comprising:

[0007] A fixed mold, the lower end of which is in contact with the movable mold, and the left and right end surfaces of the fixed mold are both concave inward to form two mounting grooves;

[0008] A mother mold core, wherein two mother mold cores are provided and the two mother mold cores are symmetrically embedded in the lower end of the fixed mold;

[0009] The male mold core is provided with two male mold cores, the two male mold cores are symmetrically embedded in the upper end of the movable mold, and the two male mold cores are respectively attached to the lower ends of the two female mold cores;

[0010] Pushing members, two pushing members are symmetrically installed on the left and right ends of the movable mold, and the left and right ends of the male mold core are slidably connected to the pushing members;

[0011] Embedded PIN auxiliary parts: two embedded PIN auxiliary parts are symmetrically embedded on the upper end of the male mold core, and the embedded PIN auxiliary parts are located on the inner side of the pusher;

[0012] A second oil cylinder, wherein four second oil cylinders are provided and the four second oil cylinders are respectively installed in four installation grooves;

[0013] Four first shifting blocks are provided, and the four first shifting blocks are respectively mounted on the lower ends of the movable parts of the four second oil cylinders. The four first shifting blocks respectively penetrate the four pushing members, and the cross-section of the first shifting blocks is a trapezoidal shape with a narrow bottom and a wide top;

[0014] Auxiliary parts, four of which are provided, and the four auxiliary parts are respectively installed at the lower ends of the four first shifting blocks, and the auxiliary parts are located on the lower side of the pushing member;

[0015] A conveying member is connected to the upper ends of the two female mold cores, the conveying member is installed in the fixed mold, and the conveying member extends out of the upper side of the fixed mold;

[0016] The limiting parts are fitted on the upper end of the male mold core with four limiting parts, and the four limiting parts are respectively clamped on the four side ends of the female mold core, and the limiting parts are located on the outside of the pushing part.

[0017] Furthermore, the limiting member includes a second slider, which is slidably connected to the upper end of the movable mold, and the second slider is attached to the upper end of the male mold core. The second slider is located in a second groove, and the second groove is opened at the lower end of the fixed mold. A second shift block is installed at the top of the second groove, and the cross-section of the second shift block is a trapezoidal shape with a narrow bottom and a wide top. The second shift block passes through the second slider, and the second slider passes through the female mold core and is connected to the molding cavity at the lower end of the female mold core.

[0018] Furthermore, the conveying part includes an injection port, which is arranged in the middle of the upper end of the fixed mold, and the lower end of the injection port is connected to a diverter plate, and the diverter plate is located in the fixed mold, and the lower end of the diverter plate is symmetrically connected to two nozzles, which are respectively installed on the upper ends of two mother mold cores, and the nozzles pass through the mother mold core and are connected to the molding cavity at the lower end of the mother mold core.

[0019] Furthermore, the pushing member includes a first oil cylinder, which is installed at the side end of the movable mold. The movable part of the first oil cylinder is provided with a first slider toward the inner end. The first slider is slidably connected to the movable mold, and the first shift block passes through the first slider. The first slider is slidably connected to the side end of the male mold core, and the first slider extends into the male mold core.

[0020] Furthermore, the PIN embedding auxiliary part includes a metal PIN embedded mother mold, the metal PIN embedded mother mold is embedded in the upper end of the male mold core, and the metal PIN embedded mother mold is located on the inner side of the first slider, the upper end surface of the metal PIN embedded mother mold is recessed downward to form two slots, and the slots are connected to the forming cavity at the upper end of the male mold core, and a guide correction groove is provided at the upper opening of the slot.

[0021] Furthermore, the auxiliary part includes a backhoe insert, which is arranged at the lower end of the first shift block and is located on the lower side of the first slider. The upper end surface of the backhoe insert is recessed downward to form a trapezoidal groove, and the trapezoidal groove is arranged to be wide at the top and narrow at the bottom. The lower end of the first shift block extends into the trapezoidal groove.

[0022] Furthermore, the bottom end surface of the trapezoidal groove is recessed downward to form a first groove, the lower end of the first shift block is embedded with a magnetic plate, and the magnetic plate is located at the upper end of the first groove, a magnetic block is installed in the first groove, and the magnetic block is located directly below the magnetic plate, and the magnetic block and the magnetic plate are arranged to repel each other.

[0023] Beneficial effects of the present invention:

[0024] During the mold closing process, the second shift block will move downward, and then the second shift block will pass through the second slider and restrict the second slider. Then the second oil cylinder will be used to drive the first shift block to move downward, and the first shift block will pass through the first slider and restrict the first slider. The restricted first and second sliders will resist the injection pressure generated during injection molding, and prevent the slider from retreating, effectively reducing the probability of the slider retreating due to the injection pressure factor generated during plastic molding, effectively reducing the probability of defective injection molded products, and effectively ensuring the injection molding effect and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 This is a structural schematic diagram of a buried PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to the present invention;

[0027] Figure 2 This is a cross-sectional view of a buried PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to the present invention;

[0028] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0029] Figure 4 This is an assembly diagram of the fixed mold, injection port and manifold in a buried PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to the present invention;

[0030] Figure 5 This is an assembly diagram of the fixed mold and the nozzle of a buried PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to the present invention;

[0031] Figure 6 A three-dimensional diagram of a movable mold in a buried PIN type injection molding device with multiple slide blocks to prevent the oil cylinder from retreating according to the present invention;

[0032] Figure 7 This is an assembly diagram of the first oil cylinder, the second oil cylinder, the female mold core, and the male mold core in a buried PIN type injection molding device with multiple slide blocks to prevent the oil cylinder from retreating according to the present invention;

[0033] Figure 8 This is an assembly diagram of the first slider and the first shift block in a multi-slider embedded PIN type injection molding device for preventing the oil cylinder from retreating according to the present invention;

[0034] Figure 9 This is an assembly diagram of the second slider and the second shift block in a multi-slider embedded PIN type injection molding device for preventing the oil cylinder from retreating according to the present invention;

[0035] Figure 10 for Figure 9 sectional view of .

[0036] In the picture:

[0037] 1. Fixed mold, 11. Injection port, 12. Diverter plate, 13. Nozzle;

[0038] 2. Moving mold, 3. First oil cylinder, 31. First slide;

[0039] 4. Second oil cylinder, 41. First shift block, 411. Magnetic plate, 42. Backhoe insert, 421. Magnetic block, 422. First groove;

[0040] 5. Female mold core, 51. Second slider, 52. Second shift block, 6. Male mold core, 61. Metal PIN embedded in the female mold, 62. Slot. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0042] Example 1: Figures 1-10As shown, a multi-slider embedded PIN type injection molding device for preventing the oil cylinder from retreating is provided, comprising: a fixed mold 1, a movable mold 2 is attached to the lower end of the fixed mold 1, a mounting carrier is provided for the female mold core 5 through the fixed mold 1, and a mounting carrier is provided for the male mold core 6 through the movable mold 2. Two mounting grooves are formed inwardly on both the left and right end surfaces of the fixed mold 1, and the mounting grooves provide mounting space for the second oil cylinder 4. The two female mold cores 5 are symmetrically embedded in the lower end of the fixed mold 1, and then the two male mold cores 6 attached to the lower ends of the two female mold cores 5 are symmetrically embedded in the upper end of the movable mold 2. The male mold core 6 and the female mold core 5 are used in conjunction with each other to form an injection molding cavity.

[0043] The injection port 11 is set on the middle part of the upper end of the fixed mold 1, and the raw material melt is transported to the diverter plate 12 through the injection port 11, and the diverter plate 12 located in the fixed mold 1 is connected and installed on the lower end of the injection port 11, and a hot runner system is set on the diverter plate 12. The transported raw material melt is diverted through the diverter plate 12, and then the two nozzles 13 installed on the upper ends of the two mother mold cores 5 are symmetrically connected and set on the lower end of the diverter plate 12, and the nozzles 13 pass through the mother mold core 5 and are connected with the molding cavity at the lower end of the mother mold core 5. The raw material melt is transported to the molding cavity at the lower end of the mother mold core 5 through the nozzles 13.

[0044] Two metal PIN embedded female molds 61 are symmetrically embedded on the upper end of the male mold core 6 and are located on the inner side of the first slider 31. The metal PIN embedded female mold 61 provides a carrier for the slots 62. The upper end surface of the metal PIN embedded female mold 61 is recessed downward to form two slots 62 that are connected to the molding cavity at the upper end of the male mold core 6. The slots 62 provide installation space for the metal PINs. A guide correction groove is provided at the upper end opening of the slots 62 to correct the angle of the metal PIN inserted into the slots 62.

[0045] Two first oil cylinders 3 are symmetrically installed at the left and right ends of the movable mold 2. The first oil cylinders 3 drive the first slider 31 to move. The first slider 31, which is slidably connected to the movable mold 2, is set on the inner end of the movable part of the first oil cylinder 3. The first slider 31 extending into the male mold core 6 is slidably connected to the side end of the male mold core 6. The first slider 31 is used to assist the injection molding operation of the metal PIN;

[0046] The four second oil cylinders 4 are respectively installed in the four installation slots. The first shifting block 41 is driven to move up and down by the second oil cylinders 4. Four first shifting blocks 41 with a trapezoidal cross section and a narrow bottom and wide top arrangement, which respectively pass through the four first sliding blocks 31, are respectively installed on the lower ends of the movable parts of the four second oil cylinders 4. The first shifting blocks 41 restrict the first sliding blocks 31.

[0047] Four second sliders 51 slidably connected to the upper end of the movable mold 2 are attached to the upper end of the male mold core 6, and the second slider 51 located on the outside of the first slider 31 passes through the female mold core 5 and is connected to the molding cavity at the lower end of the female mold core 5. The second slider 51 is used to assist the injection molding operation of the metal PIN, and the second slider 51 is located in the second groove opened at the lower end of the fixed mold 1. The second groove provides an installation space for the second slider 51, and a second shift block 52 with a trapezoidal cross-section that is narrow at the bottom and wide at the top and passes through the second slider 51 is installed on the top inside the second groove. The second shift block 52 restricts the second slider 51.

[0048] During use, the metal PIN is first inserted into the slot 62, and with the help of the guide correction groove, the metal PIN is effectively installed. Then, the fixed mold 1 and the movable mold 2 are closed. At this time, the two female mold cores 5 are respectively fitted with the two male mold cores 6. During the closing process, the second shift block 52 moves downward, and then the second shift block 52 passes through the second slider 51. Because the cross-section of the second shift block 52 is a trapezoidal shape with a narrow bottom and a wide top, the second slider 51 moves inward to a predetermined position during the process of the second shift block 52 passing through the second slider 51. At this time, the second shift block 52 will restrict the second slider 51, effectively preventing the second slider 51 from retreating.

[0049] Then, the first oil cylinder 3 is activated, thereby driving the first slide 31 to move inward to a predetermined position. Then, the second oil cylinder 4 is activated, thereby driving the first shift block 41 downward and causing the first shift block 41 to penetrate the first slide 31. Because the cross-section of the first shift block 41 is a trapezoidal shape with a narrow bottom and a wide top, after the first shift block 41 penetrates the first slide 31, the first shift block 41 will restrict the first slide 31. At this time, a forming cavity is formed between the female mold core 5, the male mold core 6, the first slide 31, and the second slide 51, and the top of the metal PIN is located in the forming cavity.

[0050] The raw material melt is then transported to the diverter plate 12 through the injection port 11, and then the diverter plate 12 diverts the raw material melt and transports it to the two nozzles 13, and then the raw material melt is transported to the molding cavity through the nozzle 13. The raw material melt is solidified and molded with the metal PIN in the molding cavity, thereby completing the injection molding operation of the metal PIN. The restricted first slider 31 and the second slider 51 will resist the injection pressure generated during injection molding, and realize the anti-retreat operation of the slider, effectively reducing the probability of the slider retreating due to the injection pressure factor formed during plastic molding, effectively reducing the probability of defective injection molded products, and effectively ensuring the injection molding effect and quality.

[0051] Example 2: Figure 2 and Figure 3As shown, four backhoe inserts 42 located on the lower side of the first slider 31 are respectively set on the lower ends of the four first shift blocks 41. The backhoe inserts 42 provide a processing carrier for the trapezoidal groove. The upper end surface of the backhoe insert 42 is recessed downward to form a trapezoidal groove that is wide at the top and narrow at the bottom. The lower end of the first shift block 41 extends into the trapezoidal groove, and the trapezoidal groove is used to position the downwardly moving first shift block 41.

[0052] The bottom end surface of the trapezoidal groove is recessed downward to form a first groove 422. The first groove 422 provides installation space for the magnetic block 421. The magnetic plate 411 located at the upper end of the first groove 422 is embedded in the lower end of the first shift block 41, and the magnetic block 421 located directly below the magnetic plate 411 and arranged to repel the magnetic plate 411 is installed in the first groove 422. The magnetic plate 411 and the magnetic block 421 are used in conjunction with each other to assist the return movement of the first shift block 41.

[0053] When in use, first insert the metal PIN into the slot 62, and with the help of the guide correction groove, the metal PIN is effectively installed, and then the fixed mold 1 and the movable mold 2 are closed. At this time, the two female mold cores 5 are respectively fitted with the two male mold cores 6. During the closing process, the second shift block 52 moves down and passes through the second slider 51, thereby restricting the second slider 51. Then, the first oil cylinder 3 is used to move the first slider 31 inward to a predetermined position, and then the second oil cylinder 4 is used to make the first shift block 41 pass through the first slider 31 and insert into the trapezoidal groove, thereby positioning the first shift block 41 and effectively restricting the first slider 31. At this time, the magnetic plate 411 and the magnetic block 421 are close to each other, and because the magnetic plate 411 and the magnetic block 421 are arranged to repel each other, a repulsive force is generated between the magnetic plate 411 and the magnetic block 421.

[0054] After the mold is closed, a molding cavity is formed between the female mold core 5, the male mold core 6, the first slider 31 and the second slider 51, and the top of the metal PIN is located in the molding cavity. Then, the raw material melt is transported to the two molding cavities respectively through the injection port 11, the diverter plate 12 and the two nozzles 13, so as to carry out the injection molding operation of the metal PIN. At this time, the first shift block 41 and the second shift block 52 are used to prevent the first slider 31 and the second slider 51 from retreating.

[0055] When the injection molding is completed, the second oil cylinder 4 is first used to move the first shift block 41 upward. At the same time, the repulsive force between the magnetic plate 411 and the magnetic block 421 will apply an upward thrust to the first shift block 41, thereby assisting the upward movement of the first shift block 41, effectively reducing the probability of jitter caused by the extrusion factor generated by the injection pressure on the contact surface between the first shift block 41 and the first slider 31 facing the molding cavity, effectively reducing the probability of defective injection molded products, and effectively ensuring the injection molding effect and quality.

[0056] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A multi-slide PIN-type injection molding device that prevents the oil cylinder from retreating, characterized in that: include: A fixed mold, the lower end of which is in contact with the movable mold, and the left and right end surfaces of the fixed mold are both concave inward to form two mounting grooves; A mother mold core, wherein two mother mold cores are provided and the two mother mold cores are symmetrically embedded in the lower end of the fixed mold; The male mold core is provided with two male mold cores, the two male mold cores are symmetrically embedded in the upper end of the movable mold, and the two male mold cores are respectively attached to the lower ends of the two female mold cores; Pushing members, two pushing members are symmetrically installed on the left and right ends of the movable mold, and the left and right ends of the male mold core are slidably connected to the pushing members; Embedded PIN auxiliary parts: two embedded PIN auxiliary parts are symmetrically embedded on the upper end of the male mold core, and the embedded PIN auxiliary parts are located on the inner side of the pusher; A second oil cylinder, wherein four second oil cylinders are provided and the four second oil cylinders are respectively installed in four installation grooves; Four first shifting blocks are provided, and the four first shifting blocks are respectively mounted on the lower ends of the movable parts of the four second oil cylinders. The four first shifting blocks respectively penetrate the four pushing members, and the cross-section of the first shifting blocks is a trapezoidal shape with a narrow bottom and a wide top; Auxiliary parts, four of which are provided, and the four auxiliary parts are respectively installed at the lower ends of the four first shifting blocks, and the auxiliary parts are located on the lower side of the pushing member; A conveying member is connected to the upper ends of the two female mold cores, the conveying member is installed in the fixed mold, and the conveying member extends out of the upper side of the fixed mold; The limiting parts are fitted on the upper end of the male mold core with four limiting parts, and the four limiting parts are respectively clamped on the four side ends of the female mold core, and the limiting parts are located on the outside of the pushing part.

2. The embedded PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to claim 1 is characterized in that: The limiting member includes a second slider, which is slidably connected to the upper end of the movable mold and is attached to the upper end of the male mold core. The second slider is located in a second groove, and the second groove is opened at the lower end of the fixed mold. A second shift block is installed at the top end of the second groove, and the cross-section of the second shift block is a trapezoidal shape with a narrow bottom and a wide top. The second shift block passes through the second slider, and the second slider passes through the female mold core and is connected to the molding cavity at the lower end of the female mold core.

3. The embedded PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to claim 1 is characterized in that: The conveying part includes an injection port, which is arranged in the middle of the upper end of the fixed mold. The lower end of the injection port is connected to a diverter plate, and the diverter plate is located in the fixed mold. The lower end of the diverter plate is symmetrically connected to two nozzles, which are respectively installed on the upper ends of two mother mold cores, and the nozzles pass through the mother mold core and are connected to the molding cavity at the lower end of the mother mold core.

4. The embedded PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to claim 1 is characterized in that: The pushing member includes a first oil cylinder, which is installed at the side end of the movable mold. The movable part of the first oil cylinder is provided with a first slider toward the inner end. The first slider is slidably connected to the movable mold, and the first shift block passes through the first slider. The first slider is slidably connected to the side end of the male mold core, and the first slider extends into the male mold core.

5. The embedded PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to claim 4 is characterized in that: The PIN embedding auxiliary part includes a metal PIN embedded female mold, which is embedded in the upper end of the male mold core and is located on the inner side of the first slider. The upper end surface of the metal PIN embedded female mold is recessed downward to form two slots, and the slots are connected to the forming cavity at the upper end of the male mold core, and a guide correction groove is provided at the upper opening of the slot.

6. The embedded PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to claim 4 is characterized in that: The auxiliary part includes a backhoe insert, which is arranged at the lower end of the first shift block and is located on the lower side of the first sliding block. The upper end surface of the backhoe insert is recessed downward to form a trapezoidal groove, and the trapezoidal groove is arranged to be wide at the top and narrow at the bottom. The lower end of the first shift block extends into the trapezoidal groove.

7. The embedded PIN type injection molding device with multiple slides to prevent the oil cylinder from retreating according to claim 6, characterized in that: The bottom end surface of the trapezoidal groove is recessed downward to form a first groove. The lower end of the first shift block is inlaid with a magnetic plate, and the magnetic plate is located at the upper end of the first groove. A magnetic block is installed in the first groove, and the magnetic block is located directly below the magnetic plate. The magnetic block and the magnetic plate are arranged to repel each other.

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