    <SEC-DOCUMENT>0001026655-22-000020-index.html : 20220401
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    <ACCEPTANCE-DATETIME>20220401103302
    ACCESSION NUMBER:		0001026655-22-000020
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		36
    CONFORMED PERIOD OF REPORT:	20220401
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20220401
    DATE AS OF CHANGE:		20220401

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			CORE MOLDING TECHNOLOGIES INC
    		CENTRAL INDEX KEY:			0001026655
    		STANDARD INDUSTRIAL CLASSIFICATION:	PLASTICS PRODUCTS, NEC [3089]
    		IRS NUMBER:				311481870
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-12505
    		FILM NUMBER:		22796347

    	BUSINESS ADDRESS:
    		STREET 1:		800 MANOR PARK DRIVE
    		STREET 2:		P O BOX 28183
    		CITY:			COLUMBUS
    		STATE:			OH
    		ZIP:			43228
    		BUSINESS PHONE:		8006666960

    	MAIL ADDRESS:
    		STREET 1:		800 MANOR PARK DR
    		STREET 2:		P O BOX 28183
    		CITY:			COLUMBUS
    		STATE:			OH
    		ZIP:			43228

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	CORE MATERIALS CORP
    		DATE OF NAME CHANGE:	19961107
    </SEC-HEADER>
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    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>cmt-20220401.htm
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    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>investorpresentationapri.htm
    <DESCRIPTION>EX-99.1 SPRING 2022 INVESTOR PRESENTATION
    <TEXT>
    Document 2 - file: investorpresentationapri.htm

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    <SEQUENCE>26
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    <SEQUENCE>29
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    <SEQUENCE>30
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    <TYPE>EXCEL
    <SEQUENCE>31
    <FILENAME>Financial_Report.xlsx
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    Document 31 - file: Financial_Report.xlsx

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    <SEQUENCE>32
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    <SEQUENCE>33
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    <TYPE>XML
    <SEQUENCE>34
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