An automatic constant temperature injection mold

Abstract

The invention relates to the technical field of injection mold production, and in particular to a constant temperature injection mold with automatic temperature control, comprising an upper mold and a lower mold: a cooling water tank is riveted inside the upper mold, a hot water inlet is provided at the upper left of the cooling water tank, a cold water inlet is provided at the top of the rear side of the cooling water tank, a baffle is arranged at the end of the cold water inlet, a switch gear is welded above the baffle, a gear rotating disk is meshed on the right side of the switch gear, a spiral mounting hole is provided at the center of the gear rotating disk, a spiral rod is meshed inside the spiral mounting hole, a spiral rod through hole is provided at the center of a return spring mounting block, a return spring is riveted below the return spring mounting block, a partition block is provided below the return spring, a spiral rod is welded above the partition block, and a feed hole is provided in the middle of the upper mold; the invention can automatically control the temperature, and the movement of the partition block is driven by the expansion of liquid mercury, so as to control the cold water switch and the hot water switch, and realize the self-regulation of the temperature.

Description

Technical Field

[0001] The invention relates to the technical field of injection mold production, and in particular to an automatically controlled constant temperature injection mold. Background Art

[0002] In recent years, my country's plastic mold industry has developed rapidly. At present, plastic molds account for about 30% of the entire mold industry, and injection molds have the largest demand in the entire plastic mold market. However, there are still many problems with current injection molds. The more serious problem is that the temperature of the mold cannot be actively regulated. It can only be cooled according to the water channels on the mold structure, and cannot adapt to various situations. For example, during injection molding, if the temperature of the mold is relatively low, the injection material is not easy to form or fill. If the temperature of the mold is too high, the injected molten material is not easy to cool and shape. The product is also prone to dents and deformations, and burrs are also prone to appear.

[0003] Based on this, the present invention designs an automatically controlled constant temperature injection mold to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide an automatically controlled constant temperature injection mold to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatically controlled constant temperature injection mold, comprising an upper mold and a lower mold, a hot water inlet is provided at the upper left of the upper mold, a cold water inlet is provided at the upper rear of the upper mold, a water outlet is provided at the lower right of the upper mold, a cooling water tank is riveted inside the upper mold, a hot water inlet is provided at the upper left of the cooling water tank, a cold water inlet is provided at the top of the rear side of the cooling water tank, a baffle is provided at the end of the cold water inlet, a switch gear is welded above the baffle, a gear rotating disk is meshed on the right side of the switch gear, and a gear rotating disk is provided at the center of the gear rotating disk There is a spiral mounting hole, the inside of the spiral mounting hole engages with a spiral rod, a spiral rod through hole is opened in the center of the return spring mounting block, a return spring is riveted below the return spring mounting block, a partition block is provided below the return spring, a spiral rod is welded above the partition block, a feed hole is opened in the middle of the upper mold, a cavity is cast below the feed hole, a sealing ring mounting hole is opened on the surface of the lower mold, a sealing ring is installed inside the sealing ring mounting hole, a supporting rod mounting hole is opened inside the lower mold, a supporting rod is installed inside the supporting rod mounting hole, and a supporting plate is riveted to the bottom of the supporting rod.

[0006] Furthermore, there are two switch gears, one above the cold water inlet and the other above the hot water inlet.

[0007] Furthermore, the cooling water tank is connected to the cold water inlet and the hot water inlet of the upper mold through a rubber sleeve.

[0008] Furthermore, the screw rod mounting hole is rotationally engaged with the screw rod.

[0009] Furthermore, the mounting hole of the cooling water tank is larger than the cooling water tank.

[0010] Further, the gear rotating disk is larger than the switch gear.

[0011] Furthermore, liquid mercury is placed below the internal partition block of the temperature controller.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The thermostatic injection mold with automatic temperature control starts to move downward through the upper mold and sticks to the mold surface of the lower mold. Because the liquid mercury does not feel the temperature of the mold, the liquid mercury does not expand. The partition block is sealed below the space, so the partition block is fixed and does not move upward. Therefore, the screw rod does not move upward. The gear rotating disk meshing with the screw rod does not rotate because the screw rod does not move upward. Therefore, the cold water switch is not turned on, the hot water switch is not turned off, and the hot water channel passes hot water to the cooling water tank. The mold starts to preheat the mold because of the cooling water tank;

[0014] 2. The constant temperature injection mold with automatic temperature control, when the injection hole of the mold begins to inject the molten material into the cavity, the mold is heated, and the heat is transferred to the thermostat. The liquid mercury inside the thermostat expands due to the heat. Because of the partition block, the bottom of the thermostat is closed. Therefore, the liquid mercury expands due to the heat, pushing the partition block to move upward. As the partition block moves upward, the screw rod also moves upward. Because the screw rod and the gear rotating disk are spirally meshed, when the screw rod moves upward, the gear rotating disk starts to rotate, and drives the cold water switch gear and the hot water switch gear to rotate together, opening the cold water channel, closing the hot water channel, and letting cold water into the water tank. The mold absorbs heat from the water tank and the mold begins to cool down slowly.

[0015] 3. The present invention can automatically control the temperature. The expansion of liquid mercury drives the movement of the partition block, thereby controlling the cold water switch and the hot water switch to achieve self-regulation of the temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a front and side view of the upper mold of the present invention;

[0019] Figure 3 This is a front view of the upper mold of the present invention;

[0020] Figure 4 It is a front and side view of the lower mold of the present invention;

[0021] Figure 5 This is the front view of the lower mold of the present invention;

[0022] Figure 6 It is a front and side view of the cooling water tank of the present invention;

[0023] Figure 7 It is a front view of the thermostat of the present invention;

[0024] Figure 8 It is a front and side view of the thermostat of the present invention.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-upper die; 2-lower die; 3-gear rotating disk; 4-screw rod; 5-screw rod mounting hole; 6-switch gear; 7-return spring mounting block; 8-return spring; 9-separator block; 10-temperature controller; 11-support rod; 12-sealing ring; 13-sealing ring mounting hole; 14-support rod mounting hole; 15-support plate; 16-feeding hole; 17-cavity; 18-water outlet; 19-cold water inlet; 20-hot water inlet; 21-cooling water tank. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-8The present invention provides a technical solution: comprising an upper mold 1 and a lower mold 2, a hot water inlet 20 is provided at the upper left of the upper mold 1, a cold water inlet 19 is provided at the upper rear of the upper mold 1, a water outlet 18 is provided at the lower right of the upper mold 1, a cooling water tank 21 is riveted inside the upper mold 1, the mounting hole of the cooling water tank 21 is larger than the cooling water tank 21, a hot water inlet 19 is provided at the upper left of the cooling water tank 21, a cold water inlet 19 is provided at the top of the rear side of the cooling water tank 21, the cooling water tank 21 is connected to the cold water inlet 19 and the hot water inlet 20 provided by the upper mold 1 through a rubber sleeve, a baffle is provided at the end of the cold water inlet 19, a switch gear 6 is welded above the baffle, there are two switch gears 6, which are respectively above the cold water inlet 19 and the hot water inlet 20, a gear rotating disk 3 is meshed on the right side of the switch gear 6, and the gear rotating disk 3 is larger than the open The gear 6 is large, a spiral mounting hole 5 is provided at the center of the gear rotating disk 3, and the spiral mounting hole 5 is internally meshed with the spiral rod 4, and the spiral rod mounting hole 5 is rotationally meshed with the spiral rod 4. A through hole for the spiral rod 4 is provided at the center of the return spring mounting block 7, a return spring 8 is riveted below the return spring mounting block 7, and a partition block 9 is provided below the return spring 8. Liquid mercury is installed below the internal partition block 9 of the temperature controller 10, and the spiral rod 4 is welded above the partition block 9. A feed hole 16 is provided in the middle of the upper mold 1, and a cavity 17 is cast below the feed hole 16. A sealing ring mounting hole 13 is provided on the surface of the lower mold 2, and a sealing ring 12 is installed inside the sealing ring mounting hole 13. A supporting rod mounting hole 14 is provided inside the lower mold 2, and a supporting rod 11 is installed inside the supporting rod mounting hole 14, and a supporting plate 15 is riveted to the bottom of the supporting rod 11.

[0029] A specific application of this embodiment is: when in use, after the mold feed hole 16 starts to inject the molten material into the cavity 17, the mold is heated, and the heat is transferred to the thermostat 10. The liquid mercury inside the thermostat 10 expands due to the heat. Because of the partition block 9, the bottom of the thermostat 10 is closed. Therefore, the liquid mercury expands due to the heat, pushing the partition block 9 to move upward. Because the partition block 9 moves upward, the screw rod 4 also moves upward. Because the screw rod 4 and the gear rotating disk 3 are helically meshed, when the screw rod 4 moves upward, the gear rotating disk 3 starts to rotate and drives the cold water switch gear 6 and the hot water switch gear 6 to rotate together, opening the cold water channel 19, closing the hot water channel 20, and passing cold water into the water tank. The mold absorbs heat from the water tank and the mold begins to cool down slowly. When the mold temperature decreases, the temperature of the liquid mercury inside the thermostat 10 decreases and the volume begins to shrink. The force on the partition block 9 decreases because the partition block 9 previously moved upward and compressed the return spring 8. Now the force on the partition block 9 decreases. Therefore, the partition block 9 begins to move downward due to the return spring 8. As the partition block 9 moves downward, the screw rod 4 also moves downward. As the screw rod 4 moves downward, the gear rotating disk 3 rotates in the opposite direction. As the gear rotating disk 3 rotates in the opposite direction, the switch gear 6 also rotates in the opposite direction, thereby closing the cold water channel 19 and opening the hot water channel 20.

[0030] To sum up, when the constant temperature injection mold with automatic temperature control starts to move downward through the upper mold 1 and fits tightly with the molding surface of the lower mold 2, the liquid mercury does not expand because the liquid mercury does not feel the temperature of the mold. The partition block 9 is fixed and does not move up because the space below is sealed, so the screw rod 4 does not move up. The gear rotating disk 3 meshing with the screw rod 4 does not rotate because the screw rod 4 does not move up. Therefore, the cold water switch is not turned on, the hot water switch is not turned off, and the hot water channel 19 supplies hot water to the cooling water tank. The mold starts to preheat because of the cooling water tank.

[0031] When the mold feed hole 16 starts to inject the molten material into the cavity 17, the mold is heated and the heat is transferred to the thermostat 10. The liquid mercury inside the thermostat 10 expands due to the heat. Because of the partition block 9, the bottom of the thermostat 10 is closed. Therefore, the liquid mercury expands due to the heat, pushing the partition block 9 to move upward. As the partition block 9 moves upward, the screw rod 4 also moves upward. Because the screw rod 4 and the gear rotating disk 3 are helically meshed, when the screw rod 4 moves upward, the gear rotating disk 3 starts to rotate and drives the cold water switch gear 6 and the hot water switch gear 6 to rotate together, opening the cold water channel 19, closing the hot water channel 20, and introducing cold water into the water tank. The mold absorbs heat from the water tank and the mold begins to cool down slowly.

[0032] The product model provided by the present invention is only used for the technical solution according to the structural characteristics of the product. The product can be adjusted and modified after purchase to make it more matching and conforming to the technical solution of the present invention. It is a technical solution for the best application of the technical solution. The product model can be replaced and modified according to the required technical parameters, which is well known to the technical personnel in this field. Therefore, the technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the present invention.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatically controlled constant temperature injection mold, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper left corner of the upper mold (1) is provided with a hot water inlet (20), the upper rear corner of the upper mold (1) is provided with a cold water inlet (19), the lower right corner of the upper mold (1) is provided with a water outlet (18), the upper mold (1) is internally riveted with a cooling water tank (21), the upper left corner of the cooling water tank (21) is provided with a hot water inlet (20), the rear top of the cooling water tank (21) is provided with a cold water inlet (19), the end of the cold water inlet (19) is provided with a baffle, a switch gear (6) is welded above the baffle, a gear rotating disk (3) is meshed on the right side of the switch gear (6), a spiral rod mounting hole (5) is provided at the center of the gear rotating disk (3), the spiral rod (4) is meshed inside the spiral rod mounting hole (5), and the return A through hole for the spiral rod (4) is provided at the center of the return spring mounting block (7), a return spring (8) is riveted below the return spring mounting block (7), a partition block (9) is provided below the return spring (8), the spiral rod (4) is welded above the partition block (9), a feed hole (16) is provided in the middle of the upper mold (1), a cavity (17) is cast below the feed hole (16), a sealing ring mounting hole (13) is provided on the surface of the lower mold (2), a sealing ring (12) is installed inside the sealing ring mounting hole (13), a supporting rod mounting hole (14) is provided inside the lower mold (2), a supporting rod (11) is installed inside the supporting rod mounting hole (14), and a supporting plate (15) is riveted to the bottom of the supporting rod (11); There are two switch gears (6), one above the cold water inlet (19) and the other above the hot water inlet (20); The cooling water tank (21) is connected to the cold water inlet (19) and the hot water inlet (20) provided on the upper mold (1) via a rubber sleeve.

2. An automatic constant temperature injection mold according to claim 1, characterized in that: The screw rod mounting hole (5) is rotationally engaged with the screw rod (4).

3. An automatic constant temperature injection mold according to claim 1, characterized in that: The mounting hole of the cooling water tank (21) is larger than the cooling water tank (21).

4. An automatic constant temperature injection mold according to claim 1, characterized in that: The gear rotating disk (3) is larger than the switch gear (6).

5. The automatic constant temperature injection mold according to claim 1, characterized in that: Liquid mercury is contained below the internal partition block (9) of the temperature controller (10).

Images