JP3152578U - Fitting structure of template and gate chip in hot runner system - Google Patents

Abstract

Provided is a fitting structure in which concentricity of a template and a gate bush can be easily performed with a certain accuracy, and a hot half portion can be integrated and disassembled and attached easily and easily. A gate chip 3 is provided at a tip of a gate nozzle for pouring molten resin into a cavity in a mold plate, and the gate chip protrudes from a lower surface of a receiving plate. Two or more guide portions protrude more vertically from the lower surface of the receiving plate and stand upright. An insertion hole 6 into which the gate chip is inserted is formed on the upper surface of the template. Further, two or more guide holes into which the guide portions are inserted are formed on the upper surface of the template, the guide portions are inserted into the guide holes, and an annular guide ring 10 is formed on the outer peripheral surface in the vicinity of the tip portion of the gate chip 3. Is formed. [Selection] Figure 2

Description

  The present invention relates to a fitting structure between a gate chip and a mold plate in a hot runner system for manufacturing a plastic molded product, and in particular, a gate chip installed at the tip of a gate nozzle or the like is incorporated into or removed from a mold as a hot half. The present invention relates to a fitting structure of a template and a gate chip in a hot runner system that makes it easy to perform.

Conventionally, the thing of various structures is known as a hot runner system (refer patent documents 1 and 2 grades).
In these hot runner systems, when a mold plate and a gate nozzle are assembled, if a gap of about 1/100 to 3/100 mm is generated between the gate chip and the mold plate arranged at the tip of the gate nozzle, burrs are generated. It was known to occur. For this reason, it is necessary to incorporate the gate chip by a precise operation without bringing the tip of the gate chip into contact with the template.
The hot runner system incorporates a large number of heaters, sensors, and the like, and it is necessary to carefully incorporate these wirings so that they are not sandwiched between a plurality of mold members during assembly.
Also, when removing the gate nozzle from the hot runner system at the time of repair, etc., quick work is required, and disassembly work can only be done by skilled workers. The need for disassembly work was also required.

For example, in a current hot runner system, a general process for disassembling a gate nozzle and the like from a template and an assembling process will be described with reference to FIGS.
As shown in FIG. 4, in order to disassemble the hot runner system 40, the temperature of the hot runner portion is raised, and then the valve pin 41 is removed. Thereafter, the mounting bolts 44 attaching the hot halves 43 to the template (cavity plate) 42 are removed, and the mounting plate 45 is lifted and removed from the template 42. Thereafter, the hot block 48, the spacer block 46, the gate nozzle 47, the receiving plate 49, etc. are removed in order.

  FIG. 5 is a conceptual diagram showing a more detailed disassembly example of the hot runner system. Reference numeral 101 is a sprue bush, 102 is a center positioning pin, 103 is a positioning pin for both ends, 104 is a locating ring, 105 is a manifold sensor, 106 is a coil heater, 107-A is a full-body gate chip, and 107-B is bodyless Type gate chip, 107-C is a sprue type gate chip, 108 is a pin guide, 109 is a gate nozzle, 110 is a pin bushing, 111 is a pin bushing retainer, 112 is an air cylinder, 114 is a valve pin, 115 is a valve pin spacer, 116 is a valve pin retainer, 120 is a receiving plate, 121 is a mounting plate, 122 is a spacer block, and 123 is a hot block.

  On the other hand, in order to assemble the hot runner system 40, it is necessary to carefully install the gate nozzle 47 on the template 42 so as not to hit the template 42. Thereafter, the hot block 48 is installed with care so as not to pinch each wire between the members, and is fixed with bolts 50. Thereafter, the spacer block 46 and the mounting plate 45 are installed in this order and fixed with the mounting bolts 44. Then, the temperature of the hot runner part is raised and the valve pin 41 is arranged.

  As described above, in the conventional hot runner system, it is difficult to disassemble and assemble in a short time, and skilled skills are necessary to perform in a short time, and it is difficult to secure skilled workers. there were.

JP 2008-62521 A JP 2002-113746 A

In order to solve the above-described problems, the present invention provides a mold plate and a gate chip that can be easily and accurately concentric with a mold plate and a gate nozzle when fitting the mold plate and the gate nozzle. An object is to provide a fitting structure.
In addition, a mold plate and a gate chip that can be easily disassembled and attached to the mold of the hot runner system while the gate nozzle, hot block, spacer block, receiving plate, etc., where the gate chip is disposed, are integrally coupled. An object is to provide a fitting structure.

  In order to solve the above-mentioned problems, the present invention provides a guide pin for aligning the concentricity of the template and the gate nozzle before fitting the template and the gate chip. The following configuration was adopted that allowed disassembly and mounting from the template while maintaining the gate nozzle, hot block, spacer block, backing plate, etc.).

(1) A fitting structure between a gate nozzle and a mold plate arranged in a hot half in a hot runner system, and having a gate chip at the tip of the gate nozzle for pouring molten resin into a cavity in the mold plate, The gate chip protrudes from the lower surface of the receiving plate, and two or more gate chip portions protruding from the lower surface of the receiving plate are vertically erected vertically, and the gate chip is fitted into the fitting. An insertion hole is formed in the upper surface of the template, and two or more guide holes into which the guide portion is inserted are formed in the upper surface of the template, and the guide portion is inserted into the guide hole. Accordingly, the axial center of the gate chip and the center of the inlet of the molten resin in the cavity are positioned approximately, and the opening edge of the insertion hole of the template is formed on the outer peripheral surface near the tip. Characterized by the precise positioning at the gate chip convex guide ring annular contact is formed, a fitting structure of the template and the gate chip in the hot runner system.

(2) The mold plate and gate chip in the hot runner system according to the above (1), wherein at least the gate nozzle, the hot block, the spacer block, the mounting plate, and the receiving plate are integrally coupled to the hot half. This is a fitting structure.
(3) The hot half valve gate system is selected from a full body type gate tip, and / or a sprue type gate tip or an open gate system, selected from a sprue gate tip, an extended sprue gate tip, a ring gate tip, and a point gate tip. In the hot runner system described in (1) or (2) above, one or more gate nozzles are installed.

  The present invention is a system that allows the hot runner part and the template part to be easily attached and removed when using the hot runner system. Provided is a fitting structure that allows a non-skilled worker to easily perform the work that has been performed by providing a guide mechanism.

  In addition, after the mold is molded once and a plastic molded product is confirmed, it is necessary to perform dimensional correction, embossing, engraving, gas venting, and the like. In each case, when hot runner parts need to be disassembled and reassembled, there are many cases where the use is avoided even though there are advantages such as saving resin, compressing industrial waste, shortening the molding cycle, etc. By using the fitting structure according to the present invention, it can be used in a wide range.

It is a conceptual diagram for demonstrating the fitting structure of the template and the gate chip in the hot runner system concerning this invention. It is a partial conceptual diagram for demonstrating the fitting structure of the gate chip and template which are used for the hot runner system concerning this invention. It is a conceptual diagram which shows an example of the fitting structure of the gate chip and template which are used for the hot runner system which concerns on this invention. It is drawing for demonstrating the process and assembly process of disassembling a gate nozzle etc. from the conventional template. It is drawing for demonstrating the process and assembly process of disassembling a gate nozzle etc. from the conventional template.

An example of an embodiment according to the present invention will be described below with reference to the drawings.
FIG. 1 is a conceptual diagram for explaining a fitting structure of a template and a gate chip in a hot runner system according to the present invention.
As shown in FIG. 1A, in the fitting structure 1 according to the present invention, a gate chip 3 is formed at the tip of a gate nozzle for pouring molten resin into a cavity in a template 2. The gate chip 3 protrudes from the lower surface of the receiving plate 4. Two guide portions 5, 5 stand vertically downward from the lower surface of the receiving plate 4.
An insertion hole 6 into which the gate chip 3 is inserted is formed on the upper surface of the template 2. Two guide holes 7 and 7 into which the guide portions 5 and 5 are inserted are formed on the upper surface of the template 2.

As shown in FIG. 1B, the guide portions 5 and 5 are fitted into the guide holes 7 and 7, thereby positioning the axis center of the gate chip 3 and the center of the molten resin inlet in the cavity (not shown). be able to. After positioning the shaft center, the hot half portion 9 is lowered and the mounting bolt 8 is screwed, whereby the hot runner system can be assembled easily as shown in FIG. On the other hand, the hot runner system can be disassembled simply by reversing the process, that is, by removing the mounting bolt 8 that fastens the template 2 and the hot half 9 and pulling up the hot half 9. Can do.
That is, by adopting the above-mentioned fitting structure, it is possible to easily disassemble and reassemble the hot runner system with the gate nozzle, the receiving plate and the like arranged with the gate chip in the hot half portion 9 being integrally coupled. .

FIG. 2 is a partial conceptual diagram for explaining a fitting structure between a gate chip and a template used in the hot runner system according to the present invention. Components corresponding to those in FIG. 1 are denoted by the same reference numerals. FIGS. 2A to 2C correspond to FIGS. 1A to 1C in time series.
As shown in FIG. 2A, an annular convex guide ring 10 is formed on the outer peripheral surface near the tip of the gate chip 3. The convex guide ring 10 is formed in an annular shape without a cut in FIG. 2A, but may be formed intermittently. Reference numeral 2 is a template, and reference numeral 6 is an insertion hole.

FIG. 2B shows a state in which the gate chip 3 is lowered. As the gate chip 3 is lowered, the center of the shaft is positioned by fitting the guide portion 7 and the guide hole 7 as shown in FIG. After the shaft center is positioned, the convex guide ring 10 formed in the vicinity of the distal end portion of the gate chip 3 is brought into contact with the opening edge portion 11 of the fitting insertion hole 6 in the template to fit in two stages. Combined positioning can be performed. When the gate chip 3 is further lowered, the tip of the gate chip 3 can be smoothly assembled into the insertion hole of the template 2 as shown in FIG.
Thus, by positioning the fitting between the mold plate and the gate chip in two stages, it is possible to reliably suppress burrs that are likely to occur in the fitting portion between the outer periphery of the mold plate 2 and the gate chip 3.

FIG. 3 is a conceptual diagram showing an example of a fitting structure between a gate chip and a template used in the hot runner system according to the present invention.
As shown in FIG. 3, the fitting structure according to the present invention can be disassembled and assembled in a short time. In order to assemble the hot runner system 20, hot half portions such as the gate nozzle 27, the hot block 28, the spacer block 26, the mounting plate 25, and the receiving plate 29 are integrally coupled.

Here, the structure disclosed in FIGS. 1 and 2 is adopted as the fitting structure of the template 22 and the gate chip 18. With such a structure, the hot half portion can be integrally fitted to the template, and there is no fear that each wiring in the hot half is sandwiched during assembly.
In order to disassemble the hot runner system 20, the mounting bolt 21 that attaches the integrated hot half to the template 22 is removed, and the gate nozzle 27, hot block 28, spacer block 26, mounting plate 25, and receiving plate. The hot half portions 29 and the like are lifted together and removed from the template 22.

  In this way, if the fitting structure according to the present invention is adopted, a system in which the hot runner part and the template part can be easily attached and detached can be formed. It is possible to achieve an excellent effect that the work that has been disassembled and reassembled while being carried can be easily performed even by an unskilled worker.

DESCRIPTION OF SYMBOLS 1 Fitting structure 2,22 Template 3,18 Gate chip 4,29 Receiving plate 5 Guide part 6 Insertion hole 7 Guide hole 9 Hot half part 10 Convex guide ring 11 Opening edge part 25 Mounting plate 26 Spacer block 27 Gate Nozzle 28 hot block

Claims (3)

A fitting structure of a gate nozzle and a mold plate arranged in a hot half in a hot runner system, the gate chip having a gate chip at the tip of the gate nozzle for pouring molten resin into a cavity in the mold plate, and the gate chip Protrudes from the lower surface of the receiving plate, and two or more gate tip portions projecting from the lower surface of the receiving plate are vertically erected vertically, and an insertion hole into which the gate chip is inserted is provided. Two or more guide holes into which the guide portion is inserted are formed on the upper surface of the template, and the guide portion is inserted into the guide hole. The axial center of the gate chip and the center of the inlet of the molten resin in the cavity are positioned approximately, and the outer peripheral surface near the tip is in contact with the opening edge of the insertion hole of the template Annular, characterized in that the precise positioning at the gate chip guide ring is formed of convex fitting structure of the template and the gate chip in the hot runner system that. 2. The mold plate and gate chip fitting structure in a hot runner system according to claim 1, wherein at least the gate nozzle, the hot block, the spacer block, the mounting plate, and the receiving plate are integrally coupled to the hot half. . In the hot half, one or more selected from a full body type gate tip in a valve gate system, or a sprue gate tip, an extended sprue gate tip, a ring gate tip, and a point gate tip in a sprue type gate tip or an open gate system. 3. A fitting structure for a template and a gate chip in a hot runner system according to claim 1, wherein the gate nozzle is installed.

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