Mold cavity top piece structure of bottle cap injection mold

Abstract

The utility model provides a bottle cap injection mold cavity top piece structure, which relates to the technical field of plastic processing, and comprises a fixed module, a plurality of mold cavity modules are embedded on the fixed module, an outer cylinder pipe is inserted in the mold cavity modules, a mold groove is formed at the outer end part of the outer cylinder pipe, and a cooling ring is fixed at the inner end part of the outer cylinder pipe; the fixed module is axially provided with a top leaf spring coil seat below the cooling ring, and a pressure contact switch seat is fixed at the bottom of the top leaf spring coil seat; the utility model has the beneficial effects that a cooling water channel structure in a die can be combined, and a top sheet structure consisting of the outer cylinder pipe and the cooling ring is utilized to exchange heat and cool through the contact between the heat exchange seat and flowing cooling liquid in the cooling ring when the top sheet structure is combined with a die cavity; and meanwhile, a pressing contact switch formed by combining a top leaf spring coil seat and a pressing contact switch seat is adopted for controlling the on-off state of a single mold cavity module, so that a product can be smoothly separated from a mold cavity during separation and demolding, and the practicability of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, and relates to a cavity top sheet structure of a bottle cap injection mold. Background Art

[0002] The bottle cap injection mold usually consists of two parts: a movable mold and a fixed mold. The movable mold is installed on the movable template of the injection molding machine, and the fixed mold is installed on the fixed template of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic product.

[0003] In order to meet the mold temperature requirements of the injection process, a temperature control system is required to adjust the temperature of the mold. For injection molds for thermoplastics, the main thing is to design a cooling system to cool the mold. The common method for mold cooling is to open a cooling water channel in the mold and use circulating cooling water to take away the heat of the mold. However, since the contact area between the conventional cooling water channel and the bottle cap cavity is limited by the depth of the bottle cap cavity, the cooling water channel assembly usually does not have a good cooling effect when facing a shallow cavity injection molding process, so that the product cannot be smoothly separated from the cavity during the later stage of demolding, which has limitations in use. Utility Model Content

[0004] In view of the above technical problems existing in the prior art, a bottle cap injection mold cavity top sheet structure is provided.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means:

[0006] A bottle cap injection mold cavity top plate structure, comprising a fixed module, a plurality of cavity modules are mounted on the fixed module, an outer tube is inserted into the cavity module, a mold groove is formed at the outer end of the outer tube, and a cooling ring is fixed at the inner end;

[0007] The fixed module is axially provided with a top leaf spring coil seat under the cooling ring, and a pressure touch switch seat is fixed at the bottom of the top leaf spring coil seat;

[0008] The cooling ring has a heat exchange seat extending from the bottom of the die groove, and a pair of one-way plugs are provided between the heat exchange seat and the outer tube, the cooling ring is externally connected to a liquid pipe, and the one-way plugs are both connected to the liquid pipe;

[0009] An outer ring pipe connected to an external liquid source is embedded in the fixed module, and a branch pipe is connected between the outer ring pipe and the liquid pipe.

[0010] Furthermore, the fixed module is provided with a row of mold channels between each row of mold cavity modules, and a heat insulation board is provided at the inner end between the row of mold channels and the mold cavity modules.

[0011] Furthermore, a pair of positioning shafts are symmetrically arranged on both sides of the outer port between the outer cylinder tube and the cavity module, and the positioning shafts are slidably engaged with the cavity module.

[0012] Furthermore, there is a slideway with a distance of at least 5 mm between the outer cylinder tube and the cavity module through the top spring ring seat.

[0013] Furthermore, the heat exchange base is made of a material with high thermal conductivity and uniform temperature, and the contact surface between the heat exchange base and the mold groove of the outer cylinder tube is filled with thermal conductive glue.

[0014] Furthermore, there is a groove cavity between the two ends of the heat exchange base and the one-way plug, and a plurality of annular tubes are arranged annularly between the groove cavity and the outer wall of the mold groove of the outer cylinder tube.

[0015] Furthermore, the cooling ring is a pipe diameter structure filled inside.

[0016] Furthermore, there is at least 2 mm of movement allowance at the pressure contact joint end between the top spring ring seat and the pressure contact switch seat.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] The cavity top sheet structure of this kind of bottle cap injection mold can combine with the cooling water channel structure in the mold, utilize the top sheet structure composed of the outer cylinder tube and the cooling ring, and perform heat exchange and cooling through the contact between the heat exchange base and the cooling liquid flowing in the cooling ring when combined with the cavity. At the same time, a pressure contact switch composed of a top spring ring seat and a pressure contact switch seat is used to control the on-off state of a single cavity module, so as to ensure that the product can be smoothly separated from the cavity during separation and demolding, improving the practicability of this structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structure schematic diagram of the present utility model;

[0020] Figure 2 is the internal plane structure schematic diagram of the outer cylinder tube and the cooling ring of the present utility model;

[0021] Figure 3 is the internal structure schematic diagram of the cavity module of the present utility model.

[0022] Markings in the figure: 1 - fixed module; 2 - row type channel; 3 - cavity module; 4 - outer cylinder tube; 5 - cooling ring; 6 - positioning shaft; 7 - liquid pipe; 8 - top spring ring seat; 9 - pressure contact switch seat; 10 - heat exchange base; 11 - annular tube; 12 - one-way plug; 13 - heat insulation board; 14 - outer ring tube; 15 - branch tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Please refer to Figures 1-3 , for further description of the embodiments of the present utility model;

[0024] A top sheet structure for the cavity of a bottle cap injection mold, comprising a fixed mold block 1, on which a plurality of cavity modules 3 are embedded and installed. An outer cylinder tube 4 is inserted into the cavity module 3, and a mold groove is formed at the outer end of the outer cylinder tube 4, and a cooling ring 5 is fixed at the inner end.

[0025] Axially below the cooling ring 5 on the fixed mold block 1, there is a top sheet spring seat 8, and a pressure contact switch seat 9 is fixed at the bottom of the top sheet spring seat 8.

[0026] The cooling ring 5 extends to the bottom of the mold groove to form a heat exchange seat 10, and a pair of one-way plugs 12 are arranged through between the heat exchange seat 10 and the outer cylinder tube 4. The cooling ring 5 is externally connected with a liquid pipe 7, and both one-way plugs 12 are communicated with the liquid pipe 7.

[0027] An outer ring pipe 14 connected to an external liquid source is embedded in the fixed mold block 1, and a branch pipe 15 is connected between the outer ring pipe 14 and the liquid pipe 7.

[0028] In this structure, mainly the mold groove of the outer cylinder tube 4 in the cavity module 3 is used as the butt end of the cavity forming material. The cavity structure is combined and arranged in the outer cylinder tube 4, and drives the outer cylinder tube 4 to penetrate deep into the cavity module 3 along the mold groove of the outer cylinder tube 4 in the injection molding state. By means of pressing the top sheet spring seat 8, the outer cylinder tube 4 is ejected by the axial reaction force of the top sheet spring seat 8 during demolding.

[0029] At the same time, this structure can also cooperate with the cooling water channel in the mold to make the coolant circulate and flow into the heat exchange seat 10 in the cooling ring 5, and cooperate with the contact between the heat exchange seat 10 and the mold groove to perform external cooling on the bottom surface of the cavity, so that the root of the product is separated from the cavity after molding and is smoothly separated from the cavity during the subsequent demolding process, improving the demolding efficiency and cooling effect of this structure.

[0030] Compared with the traditional mold, this top sheet structure can be installed outside the cavity structure and is inserted and combined with the cavity structure, and cooperate with the cooling structure therein to perform combined cooling with the cooling water channel of the mold, avoiding the problem that the traditional cooling water channel cooling method is limited by the relatively shallow cavity of the bottle cap injection molding and has poor cooling effect, and improving the applicability and practicability of this structure.

[0031] Preferably, a row-shaped channel 2 is separately arranged between each row of cavity modules 3 on the fixed mold block 1, and a heat insulation plate 13 is separately arranged at the inner end between the row-shaped channel 2 and the cavity module 3. By arranging the row-shaped channel 2, each cavity module 3 is separated to avoid heat conduction and mutual influence during the injection molding process of a single group of cavity modules 3.

[0032] Preferably, a pair of positioning shafts 6 are symmetrically arranged on both sides of the outer port between the outer cylinder tube 4 and the cavity module 3, and the positioning shafts 6 are in sliding fit with the cavity module 3. By means of the positioning shafts 6, the combination accuracy of the cavity module 4 and the outer cylinder tube 4 is improved, and at the same time, the sliding positioning shafts 6 are used to adapt to the ejection movement of the outer cylinder tube 4.

[0033] Preferably, there is a slideway with a distance of at least 5 mm between the outer cylinder tube 4 and the mold cavity module 3 through the top piece spring seat 8, and the axial sliding distance between the outer cylinder tube 4 and the mold cavity module 3 is adapted by the reserved slideway sliding distance, and at the same time, it conforms to the acting force of the top piece spring seat 8 in the compressed state.

[0034] Preferably, the heat exchange seat 10 is made of a uniform temperature material with high thermal conductivity, and a thermal conductive adhesive is filled between the contact surface of the heat exchange seat 10 and the mold groove of the outer cylinder tube 4, further improving the heat conduction efficiency at the contact end of the bottom surface of the mold groove between the heat exchange seat 10 and the outer cylinder tube 4 and enhancing the cooling effect.

[0035] Preferably, there is a groove cavity between the two ends of the heat exchange seat 10 and the one-way plug 12, and a plurality of annular tubes 11 are arranged in a ring between the groove cavity and the outer wall of the mold groove of the outer cylinder tube 4. Through the annular tubes 11 arranged in the model gun, the flowing cooling medium is utilized to cooperate with the contact of the annular tubes 11, acting on the contact end between the mold groove and the mold cavity structure, and synchronously enhancing the cooling effect.

[0036] Preferably, the cooling ring 5 is a pipe diameter structure filled inside. Compared with the pipeline structure using the liquid pipe 7 to connect the one-way plug 12, using the cooling ring 5 as the filling cavity for the coolant is convenient for the coolant to circulate through the two one-way plugs 12, and at the same time, it is convenient to utilize the coolant temperature to affect the internal heat exchange seat 10 to ensure the cooling effect.

[0037] Preferably, there is at least 2 mm of movement allowance at the contact end of the top piece spring seat 8 and the pressure contact switch seat 9. With the reserved 2 mm movement sliding distance, it is ensured that the top piece spring seat 8 can stably trigger the pressure contact switch seat 9 at the minimum and maximum sliding distances to control the on-off of the cooling water channel.

[0038] The implementation mode of the device is as follows:

[0039] In the structure, the mold groove of the outer cylinder tube 4 is used as the butt joint end of the mold cavity forming material. In the injection molding state, the outer cylinder tube 4 is driven along the mold groove of the outer cylinder tube 4 and inserted deeply into the mold cavity module 3. When demolding, the outer cylinder tube 4 is pushed out by the axial reaction force of the top piece spring seat 8;

[0040] At the same time, when injecting the mold into the outer cylinder tube 4, the top piece spring seat 8 is axially pressed by the cooling ring 5 to press and trigger the switch on the pressure contact switch seat 9. The on-off of the valve body at the end of the outer ring tube 14 is controlled through the switch electrical signal, and coolant is filled into the local outer ring tube 14. The coolant will enter the liquid pipe 7 along the opened branch pipe 15 and fill the entire cooling ring 5. During the process, the coolant will enter the heat exchange seat 10 through one one-way plug 12 and flow out along the other one-way plug 12. During the process, the coolant temperature acts on the heat exchange seat 10 and the annular tubes 11 arranged in its internal cavity to perform external cooling on the bottom surface of the mold cavity.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A bottle cap injection mold cavity top sheet structure, comprising a fixed module (1), characterized in that: A plurality of cavity modules (3) are mounted on the fixed module (1), an outer tube (4) is inserted into the cavity module (3), a mold groove is formed at the outer end of the outer tube (4), and a cooling ring (5) is fixed at the inner end; The fixed module (1) is axially provided with a top leaf spring coil seat (8) below the cooling ring (5), and a pressure touch switch seat (9) is fixed at the bottom of the top leaf spring coil seat (8); The cooling ring (5) is provided with a heat exchange seat (10) extending toward the bottom of the mold cavity, and a pair of one-way plugs (12) are provided between the heat exchange seat (10) and the outer tube (4); the cooling ring (5) is externally connected to a liquid pipe (7), and the one-way plugs (12) are both in communication with the liquid pipe (7); An outer ring pipe (14) provided with an external liquid source is embedded in the fixed module (1), and a branch pipe (15) is connected between the outer ring pipe (14) and the liquid pipe (7).

2. The bottle cap injection mold cavity top sheet structure according to claim 1, characterized in that: The fixed module (1) is provided with a row of mold paths (2) between each row of mold cavity modules (3), and a heat insulation board (13) is provided at the inner end between the row of mold paths (2) and the mold cavity modules (3).

3. The bottle cap injection mold cavity top sheet structure according to claim 1, characterized in that: A pair of positioning shafts (6) are symmetrically arranged on both sides of the outer port between the outer barrel (4) and the mold cavity module (3), and the positioning shafts (6) are slidably matched with the mold cavity module (3).

4. The bottle cap injection mold cavity top sheet structure according to claim 1, characterized in that: The outer tube (4) passes through a slideway with a distance of at least 5 mm between the top leaf spring coil seat (8) and the mold cavity module (3).

5. The bottle cap injection mold cavity top sheet structure according to claim 1, characterized in that: The heat exchange seat (10) is made of a temperature-averaging material with high thermal conductivity, and the contact surface between the heat exchange seat (10) and the die groove of the outer barrel (4) is filled with heat-conducting glue.

6. The bottle cap injection mold cavity top sheet structure according to claim 1, characterized in that: A groove-shaped cavity is left between the two ends of the heat exchange seat (10) and the one-way plug (12), and a plurality of annular tubes (11) are arranged between the groove-shaped cavity and the outer wall of the mold groove of the outer tube (4).

7. The bottle cap injection mold cavity top sheet structure according to claim 1, characterized in that: The cooling ring (5) is an internally filled pipe diameter structure.

8. The bottle cap injection mold cavity top sheet structure according to claim 1, characterized in that: The pressure-touch joint end of the top leaf spring coil seat (8) and the pressure-touch switch seat (9) has a movable margin of at least 2 mm.

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