Hot runner system for injection mold

Abstract

The utility model discloses a hot runner system for an injection mold, and relates to the technical field of injection molds. The hot runner system for the injection mold comprises a lower mold, an upper mold is slidably connected to the upper portion of the lower mold, and a mold cavity is formed in the attaching position when the upper mold and the lower mold are attached; the buckle assemblies are mounted on the two sides of the lower mold and used for clamping the upper mold above the upper mold for positioning; compared with a traditional method for fixing the upper mold and the lower mold through bolts, the buckle assembly is arranged, so that the upper mold and the lower mold can be more rapidly and conveniently combined, and the injection molding efficiency is improved; according to the device, the cutting-off assembly is arranged, so that the cutter on the other side can synchronously move by randomly stirring the cutter on one side, the adhesion part of the mold cavity and the guide pipe can be conveniently, rapidly and accurately cut, and the injection molding efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and particularly relates to a hot runner system for an injection mold. Background Art

[0002] The hot runner for an injection mold is an advanced heating component system, which keeps the plastic in the runner and the gate in a molten state by heating, so as to realize the convenience of not having to remove the runner and the sprue during the injection process.

[0003] Referring to a hot runner for an injection mold disclosed in the patent application with the publication number CN108556274B, which includes a first template, a second template is attached to the top of the first template, a through hole is opened at the center position inside the second template, a sleeve is fixed at the center position of the top of the second template, a connecting rod is fixed to the top inner wall of the through hole, and a top plate is fixed to the right side of the connecting rod. For this hot runner for an injection mold, through the cooperation of the first template and the second template, the plasticizer is fixed. Through the cooperation of the sleeve and the first rubber block, and through the cooperation of the vertical rod and the second rubber block, during the injection process, when the plastic enters the joint between the first template and the second template, due to the poor fluidity of the plasticizer, the air pressure increases, thereby pushing the first rubber block upward. According to the position of the first rubber block, it is judged whether the plasticizer fills the gap between the first template and the second template. It has strong practical performance, is simple to operate, and is conducive to popularization.

[0004] As shown in the above prior art, in the existing injection mold hot runner, after the mold is injected, it is necessary to use a blade to cut off the adhesion of the plasticizer inside the mold and the catheter one by one to ensure the quality of the injection mold. However, cutting off the adhesion part one by one results in low injection efficiency; in the prior art, the plasticizer is injected into the joint between the first template and the second template through a catheter. The plasticizer is viscous and easy to solidify, and when encountering cold weather, the plasticizer is likely to block the catheter during the downstream process, affecting the injection process.

[0005] Therefore, it is necessary to provide a hot runner system for an injection mold to solve the above technical problems. Summary of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] To solve the above technical problems, the utility model provides a hot runner system for an injection mold.

[0008] (2) Technical Solutions

[0009] To achieve the above purposes, the utility model is realized through the following technical solutions: A hot runner system for an injection mold, comprising:

[0010] A lower mold, with an upper mold slidably connected above the lower mold. When the upper mold and the lower mold are in contact, a mold cavity is formed at the contact area;

[0011] A snap component, installed on both sides of the lower mold, used to snap and position the upper mold above the upper mold;

[0012] A graduated cylinder component, installed in the middle of the upper mold. The lower end of the graduated cylinder component is connected to the mold cavity, and the filling of the plasticizer in the mold cavity is judged by observing the graduated cylinder component;

[0013] Conduits, symmetrically installed on both sides of the upper mold, used to inject the plasticizer into the mold cavity;

[0014] A heating component, installed on one side of the upper mold, used to synchronously heat the outer walls of the two conduits to melt the plasticizer in the conduits;

[0015] A cutting component, installed on both sides of the upper mold, used to simultaneously cut the adhesion between the plasticizer in the two conduits and the molded mold in the mold cavity.

[0016] Preferably, the snap component includes slots opened on both sides of the upper mold. Fixed blocks are fixed on both sides above the lower mold. A block is slidably connected to the inner wall of the fixed block. The block is snapped with the slot. A sliding rod is fixed on one side of the block close to the fixed block. The sliding rod is slidably connected to the fixed block. A pulling block is fixed at one end of the sliding rod passing through the fixed block. A spring is fixed on one side of the block close to the sliding rod. The end of the spring away from the block is fixed to the inner wall of the fixed block.

[0017] Preferably, the heating component includes a chute opened inside the upper mold. A connecting piece is slidably connected to the inner wall of the chute. A heat-conducting shell is slidably connected to the outer wall of the conduit close to the connecting piece. An electric heating wire is installed inside the heat-conducting shell. The two heat-conducting shells are connected by the connecting piece. A moving component for moving the connecting piece up and down is installed on one side of the upper mold close to the connecting piece.

[0018] Preferably, the moving component includes a screw rod rotatably connected to one side of the upper mold. A knob is fixed at the upper end of the screw rod. The outer wall of the screw rod is threadedly connected to the connecting piece. One side of the connecting piece close to the upper mold is slidably connected to the upper mold.

[0019] Preferably, the cutting component includes moving slots opened on both sides inside the upper mold. A cutter is slidably connected in the moving slots. The lower end of the cutter is connected to the lower end of the conduit. A synchronous movement component for making the two cutters move relative to each other is installed above the upper mold.

[0020] Preferably, the synchronous motion component includes a housing rotatably connected to the outer wall of the upper end of the graduated cylinder component. A gear is fixed to the outer wall of the housing. Extension rods are fixed to the upper ends of both cutting tools. The extension rods are slidably connected to the upper mold. A rack is fixed to one end of the extension rod close to the gear. The two racks are meshed with the gear.

[0021] (III) Advantageous Effects

[0022] The present utility model provides a hot runner system for an injection mold. Compared with the prior art, the following advantageous effects are achieved:

[0023] 1. By providing a snap component, compared with the traditional method of fixing the upper mold and the lower mold with bolts, the snap component can align the upper mold and the lower mold more quickly and conveniently, thus accelerating the injection efficiency.

[0024] 2. By providing a heating component, when the plasticizer adheres and blocks in the conduit and cannot smoothly enter the mold cavity, the outer wall of the conduit is heated to melt the adhered plasticizer, ensuring the smooth flow of the plasticizer in the conduit, which is practical.

[0025] 3. By providing a cutting component, any one of the cutting tools can be toggled to make the other cutting tool move synchronously, facilitating the precise cutting of the adhesion part between the mold cavity and the conduit, and further improving the injection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0027] Figure 2 is a schematic diagram of the relationship between the connecting member and the screw of the present utility model;

[0028] Figure 3 is a schematic diagram of the relationship between the conduit and the heat conducting shell of the present utility model.

[0029] Reference numerals in the figures: 1, lower mold; 2, upper mold; 3, mold cavity; 4, graduated cylinder component; 5, conduit; 6, card slot; 7, fixed block; 8, card block; 9, sliding rod; 10, pulling block; 11, spring; 12, sliding groove; 13, heat conducting shell; 14, heating wire; 15, connecting member; 16, screw; 17, moving groove; 18, cutting tool; 19, housing; 20, extension rod; 21, gear; 22, rack; 23, knob. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The utility model provides two technical solutions:

[0032] Figures 1 to 3 A first embodiment is shown: a hot runner system for an injection mold, comprising:

[0033] A lower mold 1, an upper mold 2 is slidably connected to the upper part of the lower mold 1, and a mold cavity 3 is formed at the bonding position when the upper mold 2 and the lower mold 1 are bonded together;

[0034] The buckle assembly is installed on both sides of the lower mold 1 and is used to clamp the upper mold 2 on the upper mold 2 for positioning;

[0035] The graduated cylinder assembly 4 is installed in the middle of the upper mold 2. The lower end of the graduated cylinder assembly 4 is connected to the mold cavity 3. By observing the graduated cylinder assembly 4, it can be judged whether the plastic fills the mold cavity 3.

[0036] The conduits 5 are symmetrically mounted on both sides of the upper mold 2 and are used to inject the plastic into the mold cavity 3;

[0037] A heating assembly is installed on one side of the upper mold 2 and is used to heat the outer walls of the two conduits 5 simultaneously to melt the plastic in the conduits 5;

[0038] The cutting assembly is installed on both sides of the upper mold 2 and is used to simultaneously cut off the adhesion between the plastic agent in the two conduits 5 and the molding mold in the mold cavity 3.

[0039] The buckle assembly includes a slot 6 opened on both sides of the upper mold 2, fixed blocks 7 are fixed on both sides above the lower mold 1, a block 8 is slidably connected to the inner wall of the fixed block 7, the block 8 is snapped into the slot 6, a slide rod 9 is fixed to the side of the block 8 close to the fixed block 7, the slide rod 9 is slidably connected to the fixed block 7, a pull block 10 is fixed to one end of the slide rod 9 that passes through the fixed block 7, a spring 11 is fixed to the side of the block 8 close to the slide rod 9, and the end of the spring 11 facing away from the block 8 is fixed to the inner wall of the fixed block 7.

[0040] The heating component includes a slide groove 12 opened inside the upper mold 2, the inner wall of the slide groove 12 is slidably connected with a connecting piece 15, the outer wall of the conduit 5 on the side close to the connecting piece 15 is slidably connected with a heat-conducting shell 13, an electric heating wire 14 is installed inside the heat-conducting shell 13, the two heat-conducting shells 13 are connected by the connecting piece 15, and a moving component for moving the connecting piece 15 up and down is installed on the side of the upper mold 2 close to the connecting piece 15.

[0041] The moving component includes a screw rod 16 rotatably connected to one side of the upper mold 2. A knob 23 is fixed to the upper end of the screw rod 16. The outer wall of the screw rod 16 is threadedly connected to a connecting member 15, and one side of the connecting member 15 close to the upper mold 2 is slidably connected to the upper mold 2.

[0042] By providing a heating component in this application, when the plasticizer adheres and blocks in the conduit 5 and cannot smoothly enter the mold cavity 3, the outer wall of the conduit 5 is heated to melt the plasticizer at the bonding part, ensuring the smooth flow of the plasticizer in the conduit 5, which is practical.

[0043] Figures 1 to 2 The second embodiment is shown. The main difference from the first embodiment is that the cutting component includes moving grooves 17 opened on both sides inside the upper mold 2. A cutter 18 is slidably connected in the moving grooves 17. The lower end of the cutter 18 communicates with the lower end of the conduit 5. A synchronous movement component for making the two cutters 18 move relative to each other is installed above the upper mold 2.

[0044] The synchronous movement component includes a sleeve 19 rotatably connected to the outer wall of the upper end of the graduated cylinder component 4. A gear 21 is fixed to the outer wall of the sleeve 19. Extension rods 20 are fixed to the upper ends of both cutters 18. The extension rods 20 are slidably connected to the upper mold 2. A rack 22 is fixed to one end of the extension rod 20 close to the gear 21. The two racks 22 are meshed with the gear 21.

[0045] By providing a cutting component in this application, any one of the cutters 18 can be toggled to make the other cutter 18 move synchronously, facilitating the precise cutting of the adhesion part between the mold cavity 3 and the conduit 5, and further improving the injection molding efficiency.

[0046] Working principle:

[0047] The graduated cylinder component 4 and the cutter 18 adopt the sleeve, connecting rod, first rubber block, slider, blade, baffle, etc. in CN108556274B, which are prior arts and will not be elaborated.

[0048] First, the upper mold 2 is clamped above the lower mold 1. When the lower end of the upper mold 2 touches the inclined surface of the block 8, the block 8 is squeezed into the fixed block 7, and the spring 11 is compressed at the same time. The sliding rod 9 slides in the fixed block 7 until the upper mold 2 is completely attached to the lower mold 1. The block 8 is aligned with the card slot 6, and the spring 11 rebounds to snap the block 8 into the card slot 6, so that the upper mold 2 is clamped above the lower mold 1.

[0049] Inject plasticizer into the mold cavity 3 through the conduit 5, and observe the graduated cylinder assembly 4 to determine whether the mold cavity 3 is filled; after the mold in the mold cavity 3 is formed, move any one of the cutting tools 18 in the direction close to the graduated cylinder assembly 4, then the extension rod 20 connected to the cutting tool 18 drives the rack 22 to move the gear 21, and the gear 21 rotates with the housing 19, so that the two racks 22 move simultaneously, driving the two cutting tools 18 to approach each other, and cutting the bonding part between the conduit 5 and the mold cavity 3.

[0050] Pull the pull block 10 in the direction away from the upper mold 2 to make the latch 8 leave the card slot 6, then the upper mold 2 can be removed, and the formed mold can be taken out.

[0051] When encountering cold weather and the plasticizer blocks the conduit 5 during the downstream process, the knob 23 can be rotated to make the screw 16 rotate, driving the connecting piece 15 to move in the chute 12, so that the heat conducting shell 13 moves on the outer wall of the conduit 5, and the heating wire 14 heats the blocked part of the conduit 5, so as to ensure that the plasticizer smoothly passes through the conduit 5 and enters the mold cavity 3.

[0052] Meanwhile, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0053] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0054] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hot runner system for an injection mold, characterized in that: include: A lower mold (1), wherein an upper mold (2) is slidably connected to the upper portion of the lower mold (1), and when the upper mold (2) and the lower mold (1) are bonded together, a mold cavity (3) is formed at the bonding portion; Buckle assemblies are installed on both sides of the lower mold (1) and are used to clamp the upper mold (2) above the upper mold (2) for positioning; A graduated cylinder assembly (4) is installed in the middle of the upper mold (2), the lower end of the graduated cylinder assembly (4) is connected to the mold cavity (3), and whether the plastic fills the mold cavity (3) can be judged by observing the graduated cylinder assembly (4); The conduits (5) are symmetrically mounted on both sides of the upper mold (2) and are used to inject the plastic into the mold cavity (3); A heating assembly is installed on one side of the upper mold (2) and is used to simultaneously heat the outer walls of the two conduits (5) to melt the plastic agent in the conduits (5); The cutting components are installed on both sides of the upper mold (2) and are used to simultaneously cut off the adhesion between the plastic agent in the two conduits (5) and the molding mold in the mold cavity (3).

2. A hot runner system for an injection mold according to claim 1, characterized in that: The buckle assembly comprises a clamping groove (6) provided on both sides of the upper mold (2); fixed blocks (7) are fixed on both sides above the lower mold (1); a clamping block (8) is slidably connected to the inner wall of the fixed block (7); the clamping block (8) is clamped with the clamping groove (6); a sliding rod (9) is fixed on the side of the clamping block (8) close to the fixed block (7); the sliding rod (9) is slidably connected to the fixed block (7); a pulling block (10) is fixed on one end of the sliding rod (9) passing through the fixed block (7); a spring (11) is fixed on the side of the clamping block (8) close to the sliding rod (9); and the end of the spring (11) facing away from the clamping block (8) is fixed to the inner wall of the fixed block (7).

3. A hot runner system for an injection mold according to claim 2, characterized in that: The heating component comprises a slide groove (12) opened inside the upper mold (2), the inner wall of the slide groove (12) is slidably connected to a connecting piece (15), the outer wall of the conduit (5) on one side close to the connecting piece (15) is slidably connected to a heat-conducting shell (13), a heating wire (14) is installed inside the heat-conducting shell (13), the two heat-conducting shells (13) are connected by the connecting piece (15), and a moving component for moving the connecting piece (15) up and down is installed on one side of the upper mold (2) close to the connecting piece (15).

4. A hot runner system for an injection mold according to claim 3, characterized in that: The moving assembly comprises a screw rod (16) rotatably connected to one side of the upper mold (2), a knob (23) being fixed to the upper end of the screw rod (16), an outer wall of the screw rod (16) being threadedly connected to a connecting piece (15), and a side of the connecting piece (15) close to the upper mold (2) being slidably connected to the upper mold (2).

5. A hot runner system for an injection mold according to claim 4, characterized in that: The cutting assembly comprises movable grooves (17) provided on both sides of the interior of the upper mold (2), wherein a tool (18) is slidably connected in the movable groove (17), wherein the lower end of the tool (18) is connected to the lower end of the guide tube (5), and a synchronous motion assembly is installed above the upper mold (2) to enable the two tools (18) to move relative to each other.

6. A hot runner system for an injection mold according to claim 5, characterized in that: The synchronous motion assembly comprises a casing (19) rotatably connected to the outer wall of the upper end of the scale cylinder assembly (4), a gear (21) being fixed to the outer wall of the casing (19), an extension rod (20) being fixed to the upper ends of the two cutting tools (18), the extension rod (20) being slidably connected to the upper mold (2), a rack (22) being fixed to one end of the extension rod (20) close to the gear (21), and the two racks (22) being meshingly connected to the gear (21).

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